1. The cooling and heat recovery comprehensive utilization system comprises a workshop heat recovery system and a tail gas heat utilization system; the workshop heat recovery system is characterized by comprising a first heat exchanger, a workshop cooler, a second heat exchanger and a cooling reservoir, wherein the first heat exchanger and the second heat exchanger both comprise a heat source pipe and a cold source pipe; the heat source pipe of the first heat exchanger, the workshop cooler, the heat source pipe of the second heat exchanger and the cooling reservoir are sequentially communicated through pipelines, the water inlet end of the cold source pipe of the first heat exchanger is connected with the normal-temperature water pipe, and the water outlet end of the cold source pipe of the first heat exchanger is communicated with the water inlet end of the cold source pipe of the second heat exchanger;

the tail gas heat recovery system comprises a smoke temperature recovery device and a water storage tank, the water storage tank comprises a low-temperature water storage tank and a high-temperature water storage tank which are communicated with each other at the bottoms, the smoke temperature recovery device acts on the smoke outlet of the gas boiler and at least comprises a primary smoke temperature recoverer, a secondary smoke temperature recoverer and a tertiary smoke temperature recoverer which are sequentially communicated, wherein the first-stage smoke temperature recoverer is close to the smoke outlet, the water outlet end of the cold source pipe of the second heat exchanger is divided into a first branch and a second branch, the first branch is connected to the low-temperature water storage tank, the low-temperature water storage tank is connected to the second-stage smoke temperature recoverer, the second-stage smoke temperature recoverer is further connected to the high-temperature water storage tank, the high-temperature water storage tank is connected to the primary smoke temperature recoverer, the water outlet end of the primary smoke temperature recoverer is connected to the gas-fired boiler, the second branch is connected to a third-stage smoke temperature recoverer, and the third-stage smoke temperature recoverer is connected to a low-temperature water storage tank.

2. The cooling and heat recovery integrated utilization system according to claim 1, wherein: a fourth-stage smoke temperature recovery device is added into the smoke temperature recovery device, the fourth-stage smoke temperature recovery device is connected with a fifth heat exchanger through a circulating pump, and the fifth heat exchanger acts on a fan for blowing air to the gas-fired boiler.

3. The cooling and heat recovery integrated utilization system according to claim 2, wherein: the high-temperature water storage tank is connected with a heat exchanger, and an adjusting heat exchanger for supplementing heat is connected between the high-temperature water storage tank and the water outlet end of the first smoke temperature recoverer.

4. The cooling and heat recovery integrated utilization system according to claim 1, wherein: the system is characterized by further comprising a first heating heat exchanger, a second heating heat exchanger and a heating facility, wherein the first heating heat exchanger, the workshop cooler and the heating facility are communicated to form a heating main loop, and the second heating heat exchanger is connected between the high-temperature water storage tank and the heating facility to form a heating adjusting loop.

5. The cooling and heat recovery integrated utilization system according to claim 1, wherein: and a water collecting device is arranged between the second heat exchanger and the workshop cooler.

6. The cooling and heat recovery integrated utilization system according to claim 3, wherein: the pipeline that the first branch road inserts to low temperature water storage tank and the pipeline that tertiary cigarette temperature recoverer inserts to low temperature water storage tank share one, and first branch road and tertiary cigarette temperature recoverer all are provided with the valve before inserting low temperature water storage tank.

7. The cooling and heat recovery integrated utilization system according to claim 6, wherein: the bottom of the low-temperature water storage tank is communicated with the bottom of the high-temperature water storage tank through a pipeline.

8. The cooling and heat recovery integrated utilization system according to claim 1 or 7, wherein: the smoke heat recovery device comprises a shell and a smoke temperature recoverer, wherein the shell is used for being installed at a smoke exhaust end of a gas boiler, the smoke temperature recoverer is used for recovering smoke heat, the smoke temperature recoverer is divided into a first-level smoke temperature recoverer, a second-level smoke temperature recoverer, a third-level smoke temperature recoverer and a fourth-level smoke temperature recoverer, the first-level smoke temperature recoverer, the second-level smoke temperature recoverer, the third-level smoke temperature recoverer and the fourth-level smoke temperature recoverer are sequentially fixed in the shell and are sealed with the shell, heat exchange fins are distributed on the outer side of a heat exchange tube of the smoke temperature recoverer to contact with smoke for absorbing heat, circulating water to be heated is arranged on the inner side of the heat exchange tube, and the circulating water in the heat exchange tube is heated through heat conduction of the heat exchange tube.

9. The cooling and heat recovery integrated utilization system according to claim 8, wherein: the first heat exchanger, the second heat exchanger and the first heating heat exchanger are connected in parallel on the pipelines corresponding to the positions of the first heat exchanger, the second heat exchanger and the first heating heat exchanger through bypass branch pipes, and regulating valves are arranged at the corresponding pipelines.

Background

Along with the rapid development of society, the target of carbon neutralization is a strategic target of the state, a large amount of heat sources can be generated in the production process of people, waste heat can be recycled for the heat sources of high heat source fields, such as ore smelting, chemical industry, but the temperature generated by the heat sources is not high, but the heat sources are always wasted in the field of long-term generation, for example, in the wine brewing industry, in the wine brewing process, distiller grains need to be distilled, although the distillation temperature is usually about 100 ℃, wine liquid needs to be collected after distillation and needs to be condensed, the condensation process is a heat exchanger which is directly adopted, heat is exchanged through the heat exchanger, and the exchanged heat is directly and naturally cooled and discharged; in order to make efficient use of this heat.

In the same brewing environment, high-heat steam is generally adopted to ensure the heat required by distillation in the distillation process, the steam is generated by steam boiler equipment, the economic heating mode of the steam boiler generally generates a heat source by burning combustible materials, and the combustible materials can be natural gas, coal and the like; in order to ensure the full combustion of the combustible materials, a combustion chamber of the steam boiler is provided with a fan for supplying air and a smoke exhaust pipe for exhausting smoke; but the exhausted flue gas also carries heat, and the temperature of the heat is about 200 ℃; for brewing factories, partial heat is directly discharged or simply recycled, and higher recycling benefit cannot be achieved.

Under the great trend of energy conservation and emission reduction, aiming at the production environment such as a brewing factory and the like, how to efficiently utilize the heat sources becomes a research object, and the applicant always researches how to more economically and environmentally utilize the heat sources, for example, the applicant's earlier patent applications have the following publication numbers: CN202010053976.0, waste heat intelligent recovery system; the publication number is: CN202010859544.9 is an energy-saving energy utilization system with cooling and heat energy recovery functions, which realizes the research of heat energy recovery and utilization aiming at different scenes; however, due to the difference of application environments, the adopted solution is also different, and the energy-saving systems of other application environments are directly applied to the brewing production environment, so that not only the investment is increased, but also the waste of energy is caused.

Disclosure of Invention

The application aims to provide the cooling requirement of production in an environment with low-temperature heat sources at multiple places, and meanwhile, the heat sources can be recycled more efficiently.

In order to achieve the purpose, the cooling and heat recovery comprehensive utilization system comprises a workshop heat recovery system and a tail gas heat utilization system; the workshop heat recovery system comprises a first heat exchanger, a workshop cooler, a second heat exchanger and a cooling reservoir, wherein the first heat exchanger and the second heat exchanger respectively comprise a heat source pipe and a cold source pipe; the heat source pipe of the first heat exchanger, the workshop cooler, the heat source pipe of the second heat exchanger and the cooling reservoir are communicated in sequence through pipelines, the water inlet end of the cold source pipe of the first heat exchanger is connected with a normal-temperature water pipe, the water outlet end of the cold source pipe of the first heat exchanger is communicated with the water inlet end of the cold source pipe of the second heat exchanger, the tail gas heat recovery system comprises a smoke temperature recovery device and a water storage tank, the water storage tank comprises a low-temperature water storage tank and a high-temperature water storage tank which are communicated with each other at the bottom, the smoke temperature recovery device acts on the smoke outlet of the gas boiler, the smoke temperature recovery device at least comprises a primary smoke temperature recoverer, a secondary smoke temperature recoverer and a tertiary smoke temperature recoverer which are communicated in sequence, wherein the primary smoke temperature recoverer is close to the smoke outlet, the water outlet end of the cold source pipe of the second heat exchanger is divided into a first branch and a second branch, the first branch is connected to the low-temperature water storage tank, the low-temperature water storage tank is connected to the secondary smoke temperature recoverer, the second-stage smoke temperature recoverer is further connected into a high-temperature water storage tank, the high-temperature water storage tank is connected onto the first-stage smoke temperature recoverer, the water outlet end of the first-stage smoke temperature recoverer is connected into the gas boiler, the second branch is connected onto the third-stage smoke temperature recoverer, and the third-stage smoke temperature recoverer is connected into the low-temperature water storage tank.

The system has the following working mode and principle that firstly, a workshop heat recovery system is utilized to recover low-temperature heat generated in a production link, for example, gasified alcohol needs to be condensed in a distillation process, firstly, heat concentrated in a cooling water reservoir with residual heat is recovered, and the heat in the cooling water reservoir is generally 40-48 ℃. The cooling reservoir is connected to a heat source pipe of the first heat exchanger, tap water (normal temperature water) with the temperature of 15-20 ℃ is connected to a cold source pipe of the first heat exchanger, and the temperature of the tap water after heat exchange is increased to 30-35 ℃. The second heat source is a distiller in a workshop, the heat in the distiller is collected by a workshop cooler, the cooling water in the workshop cooler is heated to 55-60 ℃, and the tap water from the first heat exchanger is heated to 50-55 ℃ again by a second heat exchanger.

Retrieve gas boiler's tail gas heat, this application is accomplished through multistage recoverer and is retrieved step by step. The method comprises the steps of introducing tap water heated by a workshop heat recovery system into a three-stage smoke temperature recoverer, heating the tap water at 50-55 ℃ by utilizing tail gas heat absorbed by a first-stage smoke temperature recoverer and a second-stage smoke temperature recoverer, introducing the tap water into a low-temperature water storage tank again when the temperature of the tap water rises to 60-65 ℃, introducing water in the low-temperature water storage tank into the second-stage smoke temperature recoverer again through a water pump, absorbing the heat by the second-stage smoke temperature recoverer, raising the temperature of the tap water to 80-85 ℃, and directly introducing the tap water into a high-temperature water storage tank of the water storage tank for later. And finally, the tap water with the temperature of 80-85 ℃ is introduced into the first-stage recovery pipe again to be heated to the temperature of more than 90 ℃, and the part of the water is introduced into the gas-fired boiler, so that the water of the gas-fired boiler has higher temperature, and the use of gas can be greatly reduced.

The application has the advantages that: comprehensively absorbs the heat of tail gas in a production workshop, a cooling reservoir and a gas boiler, thereby heating tap water only at about 20 ℃ to 80-85 ℃, fully recycling the heat source produced in the workshop in the whole process and realizing multi-stage refined heat source collection. The water can be used for boiler water, and the requirements of heat utilization and heating are expanded.

Two heat exchange tubes in a heat exchanger are referred to herein as a heat source tube and a cold source tube, respectively.

In order to reuse the waste heat of the flue gas, a fourth-stage flue gas temperature recovery device is added into the flue gas temperature recovery device, the fourth-stage flue gas temperature recovery device is connected with a fifth heat exchanger through a circulating pump, the fifth heat exchanger acts on a fan for blowing air to the gas-fired boiler, and the purpose is to heat the air at the fan, effectively increase the temperature of a hearth, improve the production efficiency of the boiler and reduce the fuel consumption. And the tail gas discharged from the gas boiler is below 45 ℃, thereby avoiding scalding the skin of the human body.

In order to fully utilize the heat recovery heat and create greater benefit, the high-temperature water storage tank is connected with a heat output circulating heat exchange system to provide heat for other heat utilization units; a circulating branch pipe is arranged in front of a water outlet end of the first-stage smoke temperature recoverer, and the circulating branch pipe and a water inlet pipe of the first-stage smoke temperature recoverer form a loop, so that when the outlet temperature of the first-stage smoke temperature recoverer is higher than a set temperature, a circulating pump on the loop is automatically started, a heat exchanger on the loop is used for cooling, meanwhile, heat is conducted to a heat output circulating heat exchange system to supplement the heat of the system, and waste of heat energy is avoided.

In order to utilize the high-temperature water storage tank, the high-temperature water storage tank is connected with a heat utilization heat exchanger for other expanding heat, and an adjusting heat exchanger for supplementing heat is connected between the high-temperature water storage tank and the water outlet end of the first smoke temperature recoverer.

In order to use the heat in the system for heating, the system further comprises a first heating heat exchanger, a second heating heat exchanger and a heating facility, wherein a heat source pipe of the first heating heat exchanger is arranged between an outlet of a workshop cooler and an inlet of a cooling tower and forms a heating main loop with a heating circulating system, and a heat source pipe of the second heating heat exchanger is arranged on a heat output circulating heat exchange system pipeline of the high-temperature water storage tank to form a heating regulating loop for the heating system.

In order to adjust the water quantity circulated by the system, a water collecting device is arranged between the second heat exchanger and the workshop cooler.

In order to save pipelines, the pipeline of the first branch circuit connected to the low-temperature water storage tank and the pipeline of the third-level smoke temperature recoverer connected to the low-temperature water storage tank share one pipeline, and valves are arranged before the first branch circuit and the third-level smoke temperature recoverer are connected to the low-temperature water storage tank.

In order to ensure that the water storage tank can also carry out heat exchange, the low-temperature water storage tank and the high-temperature water storage tank are independent box bodies, and the bottoms of the low-temperature water storage tank and the high-temperature water storage tank are communicated through a pipeline; let the low temperature water storage tank and the high temperature water storage tank alternate segregation of storing like this, realize the high efficiency that the heat absorbs water, the hydroenergy of bottom intercommunication simultaneously can not pass through external heat exchange, also can promote the temperature rapidly.

In order to adjust the water inflow entering the first heat exchanger, the second heat exchanger and the first heating heat exchanger, the first heat exchanger, the second heat exchanger and the first heating heat exchanger are connected in parallel on pipelines corresponding to the positions of the first heat exchanger, the second heat exchanger and the first heating heat exchanger through bypass branch pipes, and adjusting valves are arranged at the corresponding pipelines.

The smoke heat recovery device comprises a shell used for being installed at a smoke discharging end of a gas boiler and a smoke temperature recoverer used for recovering smoke heat, the smoke temperature recoverer is divided into a first-stage smoke temperature recoverer, a second-stage smoke temperature recoverer, a third-stage smoke temperature recoverer and a fourth-stage smoke temperature recoverer, the smoke temperature recoverer is sequentially fixed in the shell and sealed with the shell, heat exchange fins are distributed on the outer side of a heat exchange tube of the smoke temperature recoverer and contact with smoke to absorb heat, circulating water to be heated is arranged on the inner side of the heat exchange tube, and the circulating water in the heat exchange tube is heated through heat conduction of the heat exchange tube. The four-stage smoke temperature recoverer can gradually utilize the heat of the smoke generated by the steam boiler in a gradient manner, so that the heat of the smoke is fully recovered.

Drawings

FIG. 1: is a connection diagram of the vehicle-to-vehicle heat recovery system in example 1;

FIG. 2: the tail gas heat utilization system in the embodiment 2;

FIG. 3: the whole connection diagram of the cooling and heat recovery comprehensive utilization system in the embodiment 3 is shown;

FIG. 4: is a schematic structural diagram of the smoke temperature recovery device in fig. 3.

Detailed Description

The following is a more detailed description of the present invention with reference to specific embodiments.

The reference numbers of the drawings in the specification include: cooling the water reservoir 1; a smoke temperature recovery device 2; a first-stage smoke temperature recoverer 2-1; a second-stage smoke temperature recoverer 2-2; 2-3 of a three-level flue gas temperature recoverer; 2-4 of a four-stage smoke temperature recoverer; 2-5 parts of a shell; heat collecting fins 2-6; 2-7 condensate water drain pipes; a gas boiler 3; a fan 4; a fifth heat exchanger 4-1; a water storage tank 5; 5-1 of a low-temperature water storage tank; 5-2 parts of a high-temperature water storage tank; a heat supplementary heat exchanger 6; a first heat exchanger 7; a plant cooler 8; a first heating heat exchanger 9; a water collecting device 11; a second heat exchanger 12; a second heating heat exchanger 13; an expanding heat exchanger 14; the valve 15 is adjusted.

Example 1:

as shown in fig. 1, the system for recovering the plant heat comprises a first heat exchanger 7, a plant cooler 8, a second heat exchanger 12 and a cooling reservoir 1, wherein the first heat exchanger 7 and the second heat exchanger 12 both comprise a heat source pipe and a cold source pipe; the heat source pipe of the first heat exchanger 7, the workshop cooler 8, the heat source pipe of the second heat exchanger and the cooling reservoir 1 are sequentially communicated through pipelines, the water inlet end of the cold source pipe of the first heat exchanger is connected with a tap water pipe, and the water outlet end of the cold source pipe of the first heat exchanger is communicated with the water inlet end of the cold source pipe of the second heat exchanger; a water collecting device 11 is installed between the second heat exchanger 12 and the plant cooler 8.

The low-temperature heat generated in the production link is recovered by a workshop heat recovery system, for example, in the distillation process, gasified alcohol needs to be condensed, firstly, the heat concentrated in a cooling water reservoir 1 with residual heat is recovered, and the heat in the cooling water reservoir 1 is generally 40-48 ℃. The cooling reservoir 1 is connected to a heat source pipe of the first heat exchanger 7, tap water (normal temperature water) of 15-20 ℃ is connected to a cold source pipe of the first heat exchanger 7, and the temperature of the tap water after heat exchange is increased to 30-35 ℃. The second heat source is a distiller in a workshop, the heat in the distiller is collected through a workshop cooler 8, at the moment, cooling water in the workshop cooler 8 is heated to 55-60 ℃, tap water from the first heat exchanger 7 is heated to 50-55 ℃ again through a second heat exchanger 12, and the water collecting device 11 is used for adjusting the water quantity circulating for the whole water system so as to ensure that the water quantity fluctuates in the heat exchange process.

Example 2:

the tail gas heat recovery system shown in figure 2 comprises a smoke temperature recovery device 2 and a water storage tank 5, wherein the water storage tank 5 comprises a low-temperature water storage tank 5-1 and a high-temperature water storage tank 5-2 which are communicated with each other at the bottoms, the smoke temperature recovery device 2 acts on a smoke outlet of a gas boiler 3, the smoke temperature recovery device 2 comprises a primary smoke temperature recoverer 2-1, a secondary smoke temperature recoverer 2-2 and a tertiary smoke temperature recoverer 2-3 which are communicated with each other in sequence, wherein the primary smoke temperature recoverer 2-1 is close to the smoke outlet, the water outlet end of a cold source pipe of a second heat exchanger 12 is divided into a first branch and a second branch, the first branch is connected to the low-temperature water storage tank 5-1, the low-temperature water storage tank 5-1 is connected to the secondary smoke temperature recoverer 2-2, and the secondary smoke temperature recoverer 2-2 is further connected to the high-temperature water storage tank 5-2, the high-temperature water storage tank 5-2 is connected to the primary smoke temperature recoverer 2-1, the water outlet end of the primary smoke temperature recoverer 2-1 is connected to the gas boiler 3, the second branch is connected to the tertiary smoke temperature recoverer 2-3, and the tertiary smoke temperature recoverer 2-3 is connected to the low-temperature water storage tank 5-1.

The tap water heated to 50-55 ℃ in the embodiment 1 is divided into two parts, the first part is directly led into a low-temperature water storage tank 5-1 of a water storage tank 5, the second part is led into a three-stage smoke temperature recoverer 2-3 for the first time, the tap water at 50-55 ℃ is heated by utilizing the tail gas heat absorbed by a primary smoke temperature recoverer and a secondary smoke temperature recoverer, at the moment, the temperature of the tap water is raised to 60-65 ℃ and then led into a low-temperature water storage tank 5-1, the water in the low-temperature water storage tank 5-1 is led into the secondary smoke temperature recoverer 2-2 through a water pump, the temperature of the tap water is raised to 80-85 ℃ through the heat absorption of the secondary smoke temperature recoverer 2-2, and then the tap water is directly led into a high-temperature water storage tank 5-2 of the water storage tank.

And part of water in the high-temperature water storage tank 5-2 is introduced into the first-stage flue gas recoverer 2-1 again to heat the flue gas to above 90 ℃, and then the part of water is introduced into the gas-fired boiler 3, so that the water of the gas-fired boiler 3 has higher temperature, and the use of gas can be greatly reduced.

The pipeline of the first branch connected to the low-temperature water storage tank 5-2 and the pipeline of the third-level smoke temperature recoverer 2-3 connected to the low-temperature water storage tank share one pipeline, and valves are arranged in front of the first branch and the third-level smoke temperature recoverer which are connected to the low-temperature water storage tank.

A four-stage smoke temperature recovery device 2-4 is added into the smoke temperature recovery device 2, the four-stage smoke temperature recovery device 2-4 is connected with a fifth heat exchanger 4-1 through a circulating pump, and the fifth heat exchanger 4-1 acts on a fan 4 for blowing air to the gas-fired boiler, so that the air at the fan 4 is heated, and the heat consumed by heating the air by fuel can be reduced.

Example 3:

as shown in fig. 3, a workshop recovery system and a tail gas heat recovery system form a heat recovery whole, and a collected heat source is used for expanding heat and indoor heating, wherein the heat is replaced by water which is heated to 50-55 ℃ in the workshop recovery system through a first heating heat exchanger 9, the temperature of the replaced water is 45-50 ℃, and in order to compensate the fluctuation of the water temperature from the first heating heat exchanger 9, the heat at the high-temperature water storage tank 5-2 is replaced by heat through a second heating heat exchanger 13; this ensures that the heating temperature is above 50 ℃.

The heat for other expansion is partially completed by an expansion heat exchanger 14, and the heat in the high-temperature water storage tank 5-2 is directly replaced for daily expansion. A heat supplement heat exchanger 6 is arranged between the heat exchanger 14 for expansion and the primary recovery pipe 2-1, the heat supplement heat exchanger 6 supplements the temperature of other heat for expansion, if the temperature from the high-temperature water storage tank 5-2 can not meet the temperature of hot water, the temperature of the water from the primary smoke temperature recovery device 2-1 is heated by the heat supplement heat exchanger 6, so that the temperature of the heat for expansion is kept at 80-90 ℃.

The extended heat herein may be used for hot water supply in life, or for locations where heat sources are replenished.

In order to adjust the water inflow entering the first heat exchanger 7, the second heat exchanger 12 and the first heating heat exchanger 9, the first heat exchanger 7, the second heat exchanger 12 and the first heating heat exchanger 9 are connected in parallel on the corresponding pipelines at the positions through bypass branch pipes, and the corresponding pipelines are provided with adjusting valves 15.

Example 4:

the smoke temperature recovery device 2 shown in fig. 4 comprises a shell 2-5 used for being installed at the smoke discharging end of a steam boiler and a smoke temperature recoverer used for recovering smoke heat, wherein the smoke temperature recoverer is divided into a first-stage smoke temperature recoverer 2-1, a second-stage smoke temperature recoverer 2-2, a third-stage smoke temperature recoverer 2-3 and a fourth-stage smoke temperature recoverer 2-4 which are sequentially fixed in the shell 2-5, the smoke temperature recoverer is sealed with the shell, heat conducting fins 2-6 are arranged at the outer side part of a heat exchange tube of the smoke temperature recoverer and are contacted with smoke, circulating water to be heated is arranged in the heat exchange tube and is used for heating the circulating water in the heat exchange tube through the wall of the heat exchange tube, and a condensed water drain pipe 2-7 specially used for discharging condensed water is arranged at the bottom of the shell 2-5 of the smoke temperature recovery device.

Can utilize the tail gas heat that gas boiler produced step by step like this for the heat of tail gas is fully exchanged out, and the exhaust temperature of tail gas is between 40 ~ 50 ℃.

The above are only examples of the present application, and common general knowledge of known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.