1. A heat storage type steam supply system is characterized by comprising a gas-liquid heat exchanger, a heat storage tank, a heat exchanger, a preheater and a water tank; wherein the content of the first and second substances,

the gas-liquid heat exchanger comprises a waste heat gas inlet, a waste heat gas outlet, a first medium inlet and a first medium outlet, the heat storage tank comprises a second medium inlet, a second medium outlet, a third medium inlet and a third medium outlet, the heat exchanger comprises a fourth medium inlet, a fourth medium outlet, a liquid inlet and a steam outlet, and the preheater comprises a fifth medium inlet, a fifth medium outlet, a water inlet and a water outlet;

the waste hot gas inlet is communicated with an industrial high-temperature exhaust port through a pipeline, the waste hot gas outlet is used for discharging industrial exhaust gas, the first medium inlet is communicated with the second medium outlet through a pipeline, and the first medium outlet is communicated with the second medium inlet through a pipeline so as to recover and store industrial waste heat through heat transfer media flowing through the gas-liquid heat exchanger and the heat storage tank;

the third medium outlet is communicated with the fourth medium inlet through a pipeline, the fourth medium outlet is communicated with the fifth medium inlet through a pipeline, the fifth medium outlet is communicated with the third medium inlet through a pipeline, the water tank is communicated with the water inlet through a pipeline, the water outlet is communicated with the liquid inlet through a pipeline, the steam outlet is communicated with a pipeline of a heat user so as to supply heat stored in the heat storage tank to the heat user through the heat exchanger and the heat transfer medium of the preheater.

2. The thermal storage type steam supply system according to claim 1, wherein the material of the heat transfer medium is heat transfer oil or molten salt.

3. The thermal storage steam supply system of claim 2, wherein when the material of the heat transfer medium is a molten salt, the heat transfer medium is NaNO₃、KNO₃、NaNO₂、Ca(NO₃)₂、LiNO₃Mixed molten salt composed of at least one of the above materials.

4. The thermal storage steam supply system of claim 3, wherein the melting point of the heat transfer medium is below 100 ℃ and the decomposition temperature of the heat transfer medium is above 500 ℃.

5. The heat-storage steam supply system according to claim 1, wherein an exhaust fan is arranged in a pipeline between the waste heat gas inlet and the industrial high-temperature exhaust port; a first heat transfer medium conveying pump is arranged on a pipeline between the second medium outlet and the first medium inlet; a second heat transfer medium conveying pump is arranged on a pipeline between the third medium outlet and the fourth medium inlet; and a circulating water pump is arranged on a pipeline connecting the water tank and the water inlet.

6. The thermal storage steam supply system according to claim 5, wherein a first stop valve is provided on a pipeline between the second medium outlet and the first medium inlet; a second stop valve is arranged on a pipeline between the third medium outlet and the fourth medium inlet; and a third stop valve is arranged on a pipeline between the water tank and the water inlet.

7. The thermal storage steam supply system of claim 1, wherein the thermal storage tank comprises a housing, a thermal storage medium, a first liquid inlet pipe, a second liquid inlet pipe, a first liquid outlet pipe, a second liquid outlet pipe, and a medium guiding mechanism;

the first liquid inlet pipe and the second liquid outlet pipe are arranged at the top of the shell, the first liquid outlet pipe and the second liquid inlet pipe are arranged at the bottom of the shell, and ports of the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe, which are positioned outside the shell, are respectively a second medium inlet, a third medium inlet, a second medium outlet and a third medium outlet;

the heat storage medium is positioned in the shell, the liquid level of the heat storage medium submerges the ports of the first liquid inlet pipe and the second liquid outlet pipe which are positioned in the shell, and the heat storage medium is made of the same material as the heat transfer medium;

the medium guide mechanism is positioned between the top of the shell and the bottom of the shell and used for guiding the heat storage medium to flow in a one-way mode along the arrangement direction of the top of the shell and the bottom of the shell.

8. The thermal storage steam supply system of claim 7, wherein the medium guide mechanism comprises a plurality of first baffles and a plurality of second baffles, which are staggered and arranged in parallel with each other in a direction from the top of the housing to the bottom of the housing; wherein the content of the first and second substances,

a space is reserved between the adjacent first baffle and the second baffle;

the first baffle plate is provided with two parallel side edges, a first gap is formed between each of the two side edges and the side wall of the shell, and the other edge parts of the first baffle plate except the two side edges are hermetically connected with the side wall of the shell;

the edge of the second baffle is connected with the side wall of the shell in a sealing mode, and a second gap which is parallel to the two side edges of the first baffle is formed in the middle area of the second baffle.

9. The thermal storage steam supply system of claim 8, wherein the material of the medium directing mechanism is a low thermal conductivity material.

10. The thermal storage steam supply system of claim 8, wherein the material of the medium guide mechanism is at least one of carbon steel, stainless steel, glass reinforced plastic, copper, brass, ceramic, and polytetrafluoroethylene.

11. The thermal storage steam supply system of claim 7, wherein the thermal storage tank further comprises a flow dividing mechanism, and the flow dividing mechanism is connected to ports of the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe inside the housing.

12. The thermal storage steam supply system of claim 11, wherein the flow dividing mechanism is plate-shaped, cylindrical or spherical, and the flow dividing mechanism has a plurality of uniformly distributed through holes.

Background

Energy safety has an extremely important strategic position in national economy in China, targets of 'carbon neutralization' and 'carbon peak reaching' are put forward in the center, renewable energy sources are vigorously developed in China and energy conservation and emission reduction of high-energy-consumption industries are enhanced, waste heat resources of steel industries, cement industries and synthetic ammonia industries with huge total waste heat amount in China are the first three, energy consumption of China industrial departments accounts for about 70% of national energy consumption, energy utilization by heat energy is more than 90%, coal consumption of China power generation industries is close to 20 hundred million tons (approximately 45% of total energy consumption) every year, and about 40-50% of the coal is discharged by low-grade waste heat. A large amount of waste heat is discharged after being fully utilized, so that huge energy waste is caused, and heat pollution is brought to the atmosphere. Therefore, the storage of waste heat and the continuous and stable output are important to realize the vision of 'carbon neutralization' and 'carbon peak reaching'.

Disclosure of Invention

The invention provides a heat storage type steam supply system which can well solve the problems of waste heat intermittence and fluctuation, can continuously and stably supply steam, can improve the utilization rate of a heat storage tank and save the manufacturing cost of the system.

In order to achieve the purpose, the invention provides the following technical scheme:

a heat storage type steam supply system comprises a gas-liquid heat exchanger, a heat storage tank, a heat exchanger, a preheater and a water tank; wherein the content of the first and second substances,

the gas-liquid heat exchanger comprises a waste heat gas inlet, a waste heat gas outlet, a first medium inlet and a first medium outlet, the heat storage tank comprises a second medium inlet, a second medium outlet, a third medium inlet and a third medium outlet, the heat exchanger comprises a fourth medium inlet, a fourth medium outlet, a liquid inlet and a steam outlet, and the preheater comprises a fifth medium inlet, a fifth medium outlet, a water inlet and a water outlet;

the waste hot gas inlet is communicated with an industrial high-temperature exhaust port through a pipeline, the waste hot gas outlet is used for discharging industrial exhaust gas, the first medium inlet is communicated with the second medium outlet through a pipeline, and the first medium outlet is communicated with the second medium inlet through a pipeline so as to recover and store industrial waste heat through heat transfer media flowing through the gas-liquid heat exchanger and the heat storage tank;

the third medium outlet is communicated with the fourth medium inlet through a pipeline, the fourth medium outlet is communicated with the fifth medium inlet through a pipeline, the fifth medium outlet is communicated with the third medium inlet through a pipeline, the water tank is communicated with the water inlet through a pipeline, the water outlet is communicated with the liquid inlet through a pipeline, the steam outlet is communicated with a pipeline of a heat user so as to supply heat stored in the heat storage tank to the heat user through the heat exchanger and the heat transfer medium of the preheater.

The heat storage type steam supply system provided by the embodiment of the invention comprises a gas-liquid heat exchanger, a heat storage tank, a heat exchanger, a preheater and a water tank, wherein, the residual heat gas inlet of the gas-liquid heat exchanger is communicated with the industrial high-temperature exhaust port, the residual heat gas outlet of the gas-liquid heat exchanger is used for discharging industrial exhaust gas, an exhaust loop of the industrial exhaust gas can be formed, the first medium inlet of the gas-liquid heat exchanger is communicated with the second medium outlet on the heat storage tank, the first medium outlet of the gas-liquid heat exchanger is communicated with the second medium inlet on the heat storage tank, heat transfer medium can sequentially flow through the second medium outlet on the heat storage tank, the first medium inlet of the gas-liquid heat exchanger, the first medium outlet and the second medium inlet of the heat storage tank, and a heat storage loop can be formed, the heat transfer medium and the industrial high-temperature exhaust gas are subjected to heat exchange, and industrial waste heat in the industrial high-temperature exhaust gas is recovered and stored in the heat storage tank; and the third medium outlet of the heat storage tank is communicated with the fourth medium inlet of the heat exchanger, the fourth medium outlet of the heat exchanger is communicated with the fifth medium inlet of the preheater, the fifth medium outlet of the heat exchanger is communicated with the third medium inlet of the heat reservoir, the heat transfer medium can sequentially flow through the third medium outlet of the heat storage tank, the fourth medium inlet of the heat exchanger, the fourth medium outlet of the heat exchanger, the fifth medium inlet of the preheater, the fifth medium outlet and the third medium inlet of the heat storage tank to form a heat supply loop, the water tank is communicated with the water inlet of the preheater, the water outlet of the preheater is communicated with the liquid inlet of the heat exchanger, the steam outlet of the heat exchanger is communicated with the pipeline of the heat consumer, and water in the water tank can flow through the water inlet and the water outlet of the preheater and the liquid inlet of the heat exchanger to exchange heat with the heat transfer medium flowing through the heat exchanger, so that high-temperature water vapor is formed to supply heat to the heat consumer. Above-mentioned heat storage formula supplies steam system can collect waste heat recovery, the heat-retaining, the function in an organic whole of heat supply and steam production, setting up through the heat-retaining jar can be stored with the industry waste heat that has intermittent type nature and volatility, and can realize lasting stable heat supply, fine solution waste heat intermittent type nature and volatility's problem, make this system can last stable supply steam, and just can realize the function of heat-retaining and heat supply simultaneously through same heat-retaining jar, can improve the utilization ratio of heat-retaining jar, the cost of manufacture of saving system.

Optionally, the material of the heat transfer medium is a heat transfer oil or a molten salt.

Optionally, when the material of the heat transfer medium is a molten salt, the heat transfer medium is NaNO₃、KNO₃、NaNO₂、Ca(NO₃)₂、LiNO₃Mixed molten salt composed of at least one of the above materials.

Optionally, the melting point of the heat transfer medium is below 100 ℃ and the decomposition temperature of the heat transfer medium is above 500 ℃.

Optionally, an exhaust fan is arranged in a pipeline between the waste heat gas inlet and the industrial high-temperature exhaust port; a first heat transfer medium conveying pump is arranged on a pipeline between the second medium outlet and the first medium inlet; a second heat transfer medium conveying pump is arranged on a pipeline between the third medium outlet and the fourth medium inlet; and a circulating water pump is arranged on a pipeline connecting the water tank and the water inlet.

Optionally, a first stop valve is arranged on a pipeline between the second medium outlet and the first medium inlet; a second stop valve is arranged on a pipeline between the third medium outlet and the fourth medium inlet; and a third stop valve is arranged on a pipeline between the water tank and the water inlet.

Optionally, the heat storage tank includes a housing, a heat storage medium, a first liquid inlet pipe, a second liquid inlet pipe, a first liquid outlet pipe, a second liquid outlet pipe, and a medium guiding mechanism;

the first liquid inlet pipe and the second liquid outlet pipe are arranged at the top of the shell, the first liquid outlet pipe and the second liquid inlet pipe are arranged at the bottom of the shell, and ports of the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe, which are positioned outside the shell, are respectively a second medium inlet, a third medium inlet, a second medium outlet and a third medium outlet;

the heat storage medium is positioned in the shell, the liquid level of the heat storage medium submerges the ports of the first liquid inlet pipe and the second liquid outlet pipe which are positioned in the shell, and the heat storage medium is made of the same material as the heat transfer medium;

the medium guide mechanism is positioned between the top of the shell and the bottom of the shell and used for guiding the heat storage medium to flow in a one-way mode along the arrangement direction of the top of the shell and the bottom of the shell.

Optionally, the medium guide mechanism includes a plurality of first baffles and a plurality of second baffles, which are staggered with each other along a direction from the top of the housing to the bottom of the housing and are arranged in parallel; wherein the content of the first and second substances,

a space is reserved between the adjacent first baffle and the second baffle;

the first baffle plate is provided with two parallel side edges, a first gap is formed between each of the two side edges and the side wall of the shell, and the other edge parts of the first baffle plate except the two side edges are hermetically connected with the side wall of the shell;

the edge of the second baffle is connected with the side wall of the shell in a sealing mode, and a second gap which is parallel to the two side edges of the first baffle is formed in the middle area of the second baffle.

Optionally, the material of the medium guide mechanism is a low thermal conductivity material.

Optionally, the material of the medium guide mechanism is at least one of carbon steel, stainless steel, glass fiber reinforced plastic, red copper, brass, ceramic and polytetrafluoroethylene.

Optionally, the heat storage tank further comprises a flow dividing mechanism, and the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe are located on the port inside the shell and are connected with the flow dividing mechanism.

Optionally, the flow dividing mechanism is plate-shaped, cylindrical or spherical, and the flow dividing mechanism has a plurality of uniformly distributed through holes.

Drawings

Fig. 1 is a schematic structural diagram of a thermal storage type steam supply system according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating an operating state of a thermal storage type steam supply system according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating an operating state of another thermal storage type steam supply system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a heat storage tank according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating an operating state of a heat storage tank according to an embodiment of the present invention;

fig. 6 is a schematic view illustrating an operation state of another thermal storage tank according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first baffle according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a second baffle according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a shunt mechanism according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another shunt mechanism according to an embodiment of the present invention.

Icon:

1-a gas-liquid heat exchanger; 2-heat storage tank; 21-a housing; 211-inner shell; 212-an insulating layer; 213-a housing; 22-a heat storage medium; 231-a first liquid inlet pipe; 232-a second liquid inlet pipe; 233-first liquid outlet pipe; 234-a second outlet pipe; 24-a media guide mechanism; 241-a first baffle; 2411-a first gap; 242 — a second baffle; 2421-a second gap; 25-a flow-splitting mechanism; 251-a through hole; 3-a heat exchanger; 4-a preheater; 5-a water tank; 6-industrial high-temperature exhaust port; 7-hot user; 8-an exhaust fan; 9-a first heat transfer medium delivery pump; 10-a second heat transfer medium delivery pump; 11-a circulating water pump; 12-a first stop valve; 13-a second stop valve; 14-third stop valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 2 and fig. 3, the present invention provides a heat storage type steam supply system, which includes a gas-liquid heat exchanger 1, a heat storage tank 2, a heat exchanger 3, a preheater 4 and a water tank 5; wherein the content of the first and second substances,

the gas-liquid heat exchanger 1 comprises a waste heat gas inlet, a waste heat gas outlet, a first medium inlet and a first medium outlet, the heat storage tank 2 comprises a second medium inlet, a second medium outlet, a third medium inlet and a third medium outlet, the heat exchanger 3 comprises a fourth medium inlet, a fourth medium outlet, a liquid inlet and a steam outlet, and the preheater 4 comprises a fifth medium inlet, a fifth medium outlet, a water inlet and a water outlet;

the waste heat gas inlet is communicated with the industrial high-temperature exhaust port 6 through a pipeline, the waste heat gas outlet is used for exhausting industrial exhaust gas, the first medium inlet is communicated with the second medium outlet through a pipeline, and the first medium outlet is communicated with the second medium inlet through a pipeline so as to recover and store industrial waste heat through heat transfer media flowing through the gas-liquid heat exchanger 1 and the heat storage tank 2;

the third medium outlet is communicated with the fourth medium inlet through a pipeline, the fourth medium outlet is communicated with the fifth medium inlet through a pipeline, the fifth medium outlet is communicated with the third medium inlet through a pipeline, the water tank 5 is communicated with the water inlet through a pipeline, the water outlet is communicated with the liquid inlet through a pipeline, and the steam outlet is communicated with a pipeline of a heat user 7 so as to supply heat stored in the heat storage tank 2 to the heat user 7 through heat transfer media flowing through the heat exchanger 3 and the preheater 4.

In the heat storage type steam supply system provided by the embodiment of the invention, as shown in fig. 1, the heat storage type steam supply system comprises a gas-liquid heat exchanger 1, a heat storage tank 2, a heat exchanger 3, a preheater 4 and a water tank 5, wherein as shown in fig. 2, a residual heat gas inlet of the gas-liquid heat exchanger 1 is communicated with an industrial high-temperature exhaust port 6, a residual heat gas outlet of the gas-liquid heat exchanger 1 is used for exhausting industrial exhaust gas, an exhaust gas loop of the industrial exhaust gas can be formed, a first medium inlet of the gas-liquid heat exchanger 1 is communicated with a second medium outlet of the heat storage tank 2, a first medium outlet of the gas-liquid heat exchanger 1 is communicated with a second medium inlet of the heat storage tank 2, a heat transfer medium can sequentially flow through the second medium outlet of the heat storage tank 2, the first medium inlet of the gas-liquid heat exchanger 1, the first medium outlet and the second medium inlet of the, industrial waste heat in the industrial high-temperature exhaust gas is recovered and stored in the heat storage tank 2; moreover, as shown in fig. 3, the third medium outlet of the heat storage tank 2 is communicated with the fourth medium inlet of the heat exchanger 3, the fourth medium outlet of the heat exchanger 3 is communicated with the fifth medium inlet of the preheater 4, the fifth medium outlet of the heat exchanger 3 is communicated with the third medium inlet of the heat reservoir, the heat transfer medium can sequentially flow through the third medium outlet of the heat storage tank 2, the fourth medium inlet of the heat exchanger 3, the fourth medium outlet, the fifth medium inlet of the preheater 4, the fifth medium outlet and the third medium inlet of the heat storage tank 2 to form a heat supply loop, the water tank 5 is communicated with the water inlet of the preheater 4, the water outlet of the preheater 4 is communicated with the liquid inlet of the heat exchanger 3, the steam outlet of the heat exchanger 3 is communicated with the pipeline of the heat consumer 7, the water in the water tank 5 can flow through the water inlet and the water outlet of the preheater 4 and the liquid inlet of the heat exchanger 3 to exchange heat with the, high temperature water vapor is formed to supply heat to the heat consumer 7. Above-mentioned heat storage formula supplies steam system can collect waste heat recovery, the heat-retaining, the function in an organic whole of heat supply and steam production, can store the industry waste heat that has intermittent type nature and volatility earlier through setting up of heat storage jar 2, and can realize lasting stable heat supply, fine solution waste heat intermittent type nature and volatility's problem, make this system can last stable supply steam, and just can realize the function of heat-retaining and heat supply simultaneously through same heat storage jar 2, can improve heat storage jar 2's utilization ratio, save the cost of manufacture of system.

In the heat storage type steam supply system, the industrial high-temperature exhaust port can be a high-temperature exhaust port of enterprises such as steel plants, cement plants, chemical plants and the like. The discharged industrial waste heat can be medium-high temperature flue gas or water vapor, and can provide a heat source for a steam supply system. And after the industrial waste heat is subjected to heat exchange through the gas-liquid heat exchanger 1, the industrial waste heat can flow into a flue pipeline to discharge gas into the atmosphere.

The heat transfer medium flowing in the pipeline in the heat storage type steam supply system can be heat transfer oil or molten salt. The molten salt used as a heat transfer medium has the advantages of wide source, low price, low corrosivity, high heat storage density, low system pressure and the like.

For example, the heat transfer medium may be NaNO₃、KNO₃、NaNO₂、Ca(NO₃)₂、LiNO₃One or more mixed molten salts, such as binary Solar salt, ternary HTS salt or ternary HTS XL salt.

Further, in order to reduce the heat loss and power loss of the system pipeline, the heat transfer medium can be a molten salt heat storage material with the melting point lower than 100 ℃ and the decomposition temperature, namely the upper limit use temperature higher than 500 ℃.

The structure of the gas-liquid heat exchanger 1 can be a plate type, tube type, shell-and-tube type and other heat exchange structures, is not limited herein, and can be selected according to actual conditions, and can exchange heat between industrial waste heat and heat transfer media in a pipeline.

The structure of the heat exchanger 3 can be a plate type, a tube type, a shell-and-tube type and other heat exchange structures, the material can be steel, stainless steel or copper, and the structure and the material of the heat exchanger 3 are not limited and can be determined according to actual conditions.

The water in the water tank 5 may be softened water.

The preheater 4 may include a heat exchange coil and an electric heating rod, the electric heating rod is used to heat water flowing through the preheater 4, and the heat exchange coil is used to heat a heat transfer medium and the heated water to heat the water in the preheater 4. It should be noted that, the temperature of the water before heat exchange in the preheater 4 should be higher than the melting point of the heat transfer medium, and the temperature of the water before heat exchange in the preheater 4 needs to be heated to be higher than the melting point of the heat transfer medium by using the electric heating rod, so as to avoid solidification of the heat transfer medium after heat exchange with the water, for example, when the heat transfer medium is molten salt, the temperature of the water in the preheater 4 should be higher than the melting point of the molten salt, so as to avoid solidification of the molten salt, and when the preheater 4 is started for the first time, the electric heating rod in the preheater 4 should be started to supply the water to be heated to be higher than the melting point of the heat transfer medium.

In the heat storage type steam supply system, an exhaust fan 8 can be arranged in a pipeline between the residual heat gas inlet of the gas-liquid heat exchanger 1 and the industrial high-temperature exhaust port, so that the industrial residual heat gas at the industrial high-temperature exhaust port is exhausted into the gas-liquid heat exchanger 1; a first heat transfer medium delivery pump 9 can be arranged on a pipeline between a second medium outlet of the heat storage tank 2 and a first medium inlet of the gas-liquid heat exchanger 1, so that low-temperature heat transfer medium can be delivered into the gas-liquid heat exchanger 1 from the heat storage tank 2, and a second heat transfer medium delivery pump 10 can be arranged on a pipeline between a third medium outlet of the heat storage tank 2 and a fourth medium inlet of the heat exchanger 3, so that high-temperature heat transfer medium can be delivered into the heat exchanger 3 from the heat storage tank 2; the water tank 5 can be provided with circulating water pump 11 on the pipeline of being connected with the water inlet, can take out the water in the water tank 5 to the pre-heater 4 in, guarantees that water continuously flows to the water inlet of pre-heater 4.

Specifically, the exhaust fan 8 may be a high-temperature exhaust fan made of cast steel, carbon steel, stainless steel, or the like; the types of the first heat transfer medium delivery pump 9 and the second heat transfer medium delivery pump 10 may be selected according to the type of the heat transfer medium, for example, the first heat transfer medium delivery pump 9 and the second heat transfer medium delivery pump 10 may be a heat transfer oil pump or a molten salt pump, and are not limited herein.

In the heat storage type steam supply system, a first stop valve 12 can be arranged on a pipeline between a second medium outlet of the heat storage tank 2 and a first medium inlet of the gas-liquid heat exchanger 1, and the communication between the heat storage tank 2 and the gas-liquid heat exchanger 1 can be adjusted to store heat by adjusting the on-off state of the first stop valve 12 on the pipeline; a second stop valve 13 can be arranged on a pipeline between the third medium outlet of the heat storage tank 2 and the fourth medium inlet of the heat exchanger 3, and the heat storage tank 2, the heat exchanger 3 and the preheater 4 can be adjusted to be communicated and supply heat to the outside by adjusting the on-off state of the second stop valve 13 on the pipeline; the pipeline between the water inlet of the water tank 5 and the water inlet of the preheater 4 can be provided with a third stop valve 14, and the water can be conveyed by adjusting the on-off state of the third stop valve 14 on the pipeline and communicating the water inlet of the water tank 5 and the water inlet of the preheater 4.

In the above-mentioned heat storage type steam supply system, specifically, as shown in fig. 4, the heat storage tank 2 may include a housing 21, a heat storage medium 22, a first liquid inlet pipe 231, a second liquid inlet pipe 232, a first liquid outlet pipe 233, a second liquid outlet pipe 234, and a medium guiding mechanism 24; the first liquid inlet pipe 231 and the second liquid outlet pipe 234 may be disposed at the top of the housing 21, the first liquid outlet pipe 233 and the second liquid inlet pipe 232 may be disposed at the bottom of the housing 21, and ports of the first liquid inlet pipe 231, the second liquid inlet pipe 232, the first liquid outlet pipe 233, and the second liquid outlet pipe 234, which are located outside the housing 21, are a second medium inlet, a third medium inlet, a second medium outlet, and a third medium outlet, respectively; the heat storage medium 22 is located inside the casing 21, and the liquid level of the heat storage medium 22 submerges the ports of the first liquid inlet pipe 231 and the second liquid outlet pipe 234, which are located inside the casing 21, and the material of the heat storage medium 22 is the same as that of the heat transfer medium; the medium guide mechanism 24 is located between the top of the casing 21 and the bottom of the casing 21, and is used for guiding the heat storage medium 22 to flow in one direction along the arrangement direction of the top of the casing 21 and the bottom of the casing 21. Because be provided with medium guiding mechanism 24 in the heat storage jar 2, can guide the heat transfer medium flow direction in the heat storage jar 2, avoid the high temperature heat transfer medium in top and the low temperature heat transfer medium of bottom to take place the convection current heat transfer, can only realize the function of heat-retaining and heat supply through a heat storage jar 2, the problem that volume utilization ratio is low, the cost is high when having avoided using a plurality of heat storage jars 2 to carry out heat-retaining and heat supply respectively.

Specifically, in the process of storing heat in the heat storage tank 2, as shown in fig. 5, a low-temperature heat transfer medium is pumped from a second medium outlet at the bottom of the heat storage tank 2 to a first medium inlet of the gas-liquid heat exchanger 1, a high-temperature heat transfer medium obtained by heat exchange of the gas-liquid heat exchanger 1 enters the heat storage tank 2 from a second medium inlet at the top of the heat storage tank 2, and the high-temperature heat transfer medium can flow from the top to the bottom of the heat storage tank 2 along the medium guide mechanism 24 and press the low-temperature heat transfer medium in the heat storage tank 2 down to the bottom of the heat storage tank 2, so that a heat storage cycle is performed.

On the other hand, in the process of supplying heat to the heat storage tank 2, as shown in fig. 6, the high-temperature heat transfer medium flows from the third medium outlet at the top of the heat storage tank 2 to the fourth medium inlet of the heat exchanger 3, the temperature of the high-temperature heat transfer medium is reduced after the high-temperature heat transfer medium exchanges heat with high-temperature water, the high-temperature heat transfer medium flows into the preheater 4 and then flows back to the third medium inlet at the bottom of the heat storage tank 2 after exchanging heat with water, the heat transfer medium remaining in the heat storage tank 2 flows from the bottom of the heat storage tank 2 to the top of the heat storage tank 2 along the medium guide mechanism 24, and the high-temperature heat transfer medium in the heat storage tank 2 can be pressed to the top of the heat storage tank 2 to perform heat supply circulation.

In the heat storage tank 2, as shown in fig. 4, the medium guide mechanism 24 may be provided to include a plurality of first baffles 241 and a plurality of second baffles 242 that are staggered and arranged in parallel with each other in a direction from the top of the casing 21 to the bottom of the casing 21;

wherein, a space is arranged between the adjacent first baffle 241 and the second baffle 242; as shown in fig. 7, the first blocking plate 241 has two parallel sides, each of the two sides and the side wall of the housing 21 has a first gap 2411, and the other edge portions of the first blocking plate 241 except the two sides are connected with the side wall of the housing 21 in a sealing manner; as shown in fig. 8, the edge of the second barrier 242 is sealingly connected with the sidewall of the case 21, and the middle region of the second barrier 242 has a second gap 2421 disposed in parallel with both side edges of the first barrier 241.

The medium guide mechanism 24 may be configured in a "bow" type structure, the heat transfer medium may flow through the first gap 2411 and the second gap 2421, and may guide the flow direction of the heat transfer medium, the first baffle 241 and the second baffle 242 may concentrate the low-temperature heat transfer medium at the bottom of the heat storage tank 2, and the high-temperature heat transfer medium at the top of the heat storage tank 2, and through the blocking effect of the first baffle 241 and the second baffle 242, the convection heat transfer of the top high-temperature heat transfer medium and the bottom low-temperature heat transfer medium may be avoided, and the flow speed of the heat transfer medium in the heat storage tank 2 may be slowed down, so as to avoid the problems of low heat storage amount or heat release amount, insufficient heat charging and discharging, and the like of the heat storage tank 2.

Specifically, in the medium guide mechanism 24, it may be arranged that the interval between every two adjacent first baffles 241 and every two adjacent second baffles 242 is the same, the side edge of each first baffle 241 extends along the first direction, and the first baffles 241 are symmetrically arranged with respect to the two first gaps 2411 formed by the side wall of the housing 21.

The material of the medium guide mechanism 24 may be a low thermal conductivity material, which can ensure that the heat transfer medium transfers heat through the path guided by the medium guide mechanism, avoid the heat transfer medium directly transferring heat through the medium guide mechanism, and ensure that the heat transfer medium transfers heat well in the heat storage tank, for example, the material of the medium guide mechanism 24 may be a ceramic material or polytetrafluoroethylene. The material of the medium guide 24 may be a material having a high thermal conductivity, for example, carbon steel, stainless steel, glass fiber reinforced plastic, or the like. The material of the medium guide mechanism can be specifically selected according to actual requirements, and is not limited herein.

Specifically, the material of the medium guide 24 may be at least one of carbon steel, stainless steel, glass fiber reinforced plastic, copper, brass, ceramic, and polytetrafluoroethylene.

In the above-mentioned heat storage type steam supply system, as shown in fig. 4, the heat storage tank 2 further includes a flow dividing mechanism 25, and the ports of the first liquid inlet pipe 231, the second liquid inlet pipe 232, the first liquid outlet pipe 233, and the second liquid outlet pipe 234 located inside the housing 21 are all connected with the flow dividing mechanism 25, so that the speed of the heat transfer medium is reduced and dispersed in the process of flowing into the heat storage tank 2 and flowing out of the heat storage tank 2, and the peripheral high-temperature or low-temperature heat transfer medium is discharged, thereby avoiding causing large stirring to the heat storage material in the heat storage tank 2.

Specifically, the flow dividing mechanism 25 may be plate-shaped, cylindrical or spherical, for example, the flow dividing mechanism 25 is cylindrical in fig. 9, the flow dividing mechanism 25 is plate-shaped in fig. 10, the flow dividing mechanism 25 has a plurality of uniformly distributed through holes 251, and the heat transfer medium can be divided by the through holes 251 in the flow dividing mechanism.

Specifically, the material of the shunt mechanism 25 may be a high thermal conductivity material. For example, the material of the flow dividing mechanism 25 is one of copper, steel and iron, which can have good heat conducting performance, and is beneficial to the heat transfer medium of the heat storage tank 2 to transfer heat.

In the above-described heat storage type steam supply system, as shown in fig. 4, the housing 21 of the heat storage tank 2 may include an inner shell 211, an insulating layer 213, and an outer shell 213, which are sequentially arranged in a direction from the inside of the housing 21 to the outside.

The material of the inner shell 211 may be a material with a high thermal conductivity coefficient, which is beneficial to the heat transfer of the heat transfer medium in the heat storage tank 2; specifically, the material of the inner shell 211 may be one of copper, steel or iron, which is not limited herein and may be determined according to actual situations.

The insulating layer 213 may be made of a material with a low thermal conductivity, so as to ensure the heat storage function of the heat storage tank 2. Specifically, the material of the insulating layer 213 is at least one of vermiculite, foam glass, rock wool, aerogel felt and ceramic fiber, which is not limited herein and may be determined according to actual situations.

The material of the outer case 213 may be one of a steel plate, an aluminum plate, an iron plate, and a plastic plate, which is not limited herein and may be determined according to the actual situation.

In the heat storage type steam supply system, the inner shell 211 can be a cylindrical structure, and the structure is simple, so that the heat storage tank 2 is favorable for the flow of the heat transfer medium. The inner housing 211 may also have other shapes, and is not limited herein and may be determined according to the actual situation. The inner housing 211 and the first baffle 241 and the second baffle 242 of the medium guide 24 may be connected by welding, bolts, or slots, which are not limited herein and may be determined according to actual situations.

In the heat storage tank 2, the top of the housing 21 may be a container cover, and the container cover may be a semicircular or arc structure.

In the above-described heat storage type steam supply system, the number of the heat storage tanks 2 may be set to at least one. For example, a plurality of heat storage tanks 2 may be arranged in the heat storage type steam supply system, each heat storage tank 2 can realize the functions of heat storage and heat supply, and the plurality of heat storage tanks 2 may be distributed in a centralized manner or may be distributed in a distributed manner according to different positions of the heat users 7.

In a specific implementation manner, in the thermal storage type steam supply system provided by the embodiment of the present invention, as shown in fig. 1, three operation modes can be implemented:

the first mode is a heat storage mode, and the specific operation can be that a first stop valve 12 on a pipeline between the heat storage tank 2 and the gas-liquid heat exchanger 1 is opened, the pipeline between the gas-liquid heat exchanger 1 and the heat storage tank 2 is connected, an exhaust fan is opened, industrial waste heat is sent into the gas-liquid heat exchanger 1, a first heat transfer medium delivery pump 9 is opened, a low-temperature heat transfer medium is pumped into the gas-liquid heat exchanger 1 from the heat storage tank 2 to exchange heat with the industrial waste heat, the obtained high-temperature heat transfer medium flows back into the heat storage tank 2, the high-temperature heat transfer medium flowing back into the heat storage tank 2 is split and decelerated by a splitting mechanism 25, the high-temperature heat transfer medium flows slowly from the top of the heat storage tank 2 to the bottom of the heat storage tank 2 along with the guidance of a medium.

The second is a heat supply mode, and the specific operation can be that a second stop valve 13 on a pipeline between the heat storage tank 2 and the heat exchanger 3 is opened, a pipeline connected among the heat storage tank 2, the heat exchanger 3 and the preheater 4 is connected, a third stop valve 14 on a pipeline between the water tank 5 and the preheater 4 is opened, a pipeline connected among the water tank 5, the preheater 4 and the heat exchanger 3 is connected, a second heat transfer medium delivery pump 10 and a circulating water pump 11 are opened, a heat transfer medium flows through the heat exchanger 3 to exchange heat with high-temperature water, the temperature of the heat transfer medium is reduced, the heat transfer medium flows into the preheater 4 to exchange heat with the water and then flows back to the bottom of the heat storage tank 2, the heat transfer medium flowing back into the heat storage tank 2 is shunted and decelerated by a shunting structure, flows from the bottom of the heat storage tank 2 to the top of the heat storage tank 2 in an arch-shaped direction by the drainage of a medium guide mechanism 24, and presses the high-temperature heat transfer medium in the heat storage tank 2 to the top of the heat storage tank 2, the water in the water tank 5 is heated by the preheater 4 and then flows through the heat exchanger 3 to exchange heat to generate steam for supplying to a heat user 7.

The third mode is a heat storage and heat supply mode, namely the heat storage mode is started according to the first mode, and the heat supply mode is started according to the second mode, and the specific operation can be that the first stop valve 12 is started, a pipeline between the gas-liquid heat exchanger 1 and the heat storage tank 2 is connected, the first heat transfer medium delivery pump 9 is started, the exhaust fan 8 is started, and the low-temperature heat transfer medium is pumped into the gas-liquid heat exchanger 1 from the bottom of the heat storage light to be subjected to heat exchange to form a high-temperature heat transfer medium, and then the high-temperature heat transfer medium flows back; the second stop valve 13 is opened, the pipelines among the heat storage tank 2, the heat exchanger 3 and the preheater 4 are connected, the third stop valve 14 is opened, the water tank 5, the preheater 4, the pipeline among the heat exchanger 3 and the heat consumer 7 are connected, the second heat transfer medium delivery pump 10 and the circulating water pump 11 are opened, the heat transfer medium flows through the heat exchanger 3 to exchange heat with high-temperature water for cooling, then flows into the preheater 4 to exchange heat with water and then flows back to the bottom of the heat storage tank 2, the heat transfer medium flowing back to the bottom of the heat storage tank 2 is decelerated by the flow dividing mechanism 25 and flows from the bottom of the heat storage tank 2 to the top of the heat storage tank 2 through baffle drainage, and softened water flows through the heat exchanger 3 after being heated through the preheater 4 and exchanges heat with the heat transfer medium to generate steam to be supplied to the heat consumer 7.

In the third mode, specifically, the flow direction of the heat transfer medium in the heat storage tank 2 finally depends on the flow rate of the heat transfer medium during heat storage and the flow rate of the heat transfer medium during heat supply, for example, when the flow rate of the heat transfer medium flowing in from the second medium inlet during heat storage is equal to the flow rate of the heat transfer medium flowing out from the third medium outlet during heat supply, since the second medium inlet and the third medium outlet are both located at the top of the heat storage tank 2, the flow rate of the heat transfer medium during heat storage can be offset from the flow rate of the heat transfer medium during heat supply, and the heat transfer medium in the heat storage tank 2 does not flow; when the flow rate of the heat transfer medium during heat storage is larger than that during heat supply, one part of the flow rate of the heat transfer medium during heat storage is offset with the flow rate of the heat transfer medium during heat supply, and finally the flow direction of the heat transfer medium in the heat storage tank 2 flows from the top of the heat storage tank 2 to the bottom of the heat storage tank 2; and when the flow of the heat transfer medium during heat storage is smaller than the flow of the heat transfer medium during heat supply, a part of the flow of the heat transfer medium during heat supply is offset with the flow of the heat transfer medium during heat storage, and finally the flow of the heat transfer medium in the heat storage tank 2 flows from the bottom of the heat storage tank 2 to the top of the heat storage tank 2.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.