1. Steam comprehensive utilization system, its characterized in that includes:

a first input line for receiving high grade steam from a power plant;

a steam turbine connected to the first input line for receiving the high-grade steam from the power plant and converting steam heat energy of the high-grade steam into mechanical energy to convert the high-grade steam into low-grade steam;

a first output pipeline, wherein a first end of the first output pipeline is connected with the steam turbine;

and the lithium bromide refrigerating unit is connected with the second end of the first output pipeline and is used for refrigerating the low-grade steam output by the steam turbine to output condensed water.

2. The steam integrated utilization system of claim 1, further comprising:

the first end of the second input pipeline is connected with the first input pipeline, and the second end of the second input pipeline is connected with the lithium bromide refrigerating unit;

the first control mechanism is used for receiving and outputting a first signal according to the operating condition of the power plant;

and the adjusting mechanism is arranged on the second input pipeline and is used for adjusting the steam volume of the first input pipeline entering the second input pipeline according to the first signal.

3. The steam integrated utilizing system according to claim 2, further comprising:

the second control mechanism is used for receiving and outputting a second signal according to the operation condition of the steam turbine fed back by the steam turbine;

the adjusting mechanism is further used for receiving the second signal and adjusting the steam quantity entering the second input pipeline through the first input pipeline according to the second signal.

4. The steam integrated utilizing system according to claim 2 or 3, further comprising:

the third control mechanism is used for acquiring steam parameters fed back by the lithium bromide refrigerating unit and outputting a third signal according to the steam parameters and preset steam parameters of the lithium bromide refrigerating unit;

the adjusting mechanism is further used for receiving the third signal and adjusting the steam quantity entering the second input pipeline from the first input pipeline according to the third signal.

5. The steam integrated utilizing system according to claim 4, wherein the third control means comprises:

the acquisition unit is used for acquiring steam parameters of low-grade steam output by the lithium bromide refrigerating unit;

the comparison unit is used for comparing the steam parameters with preset steam parameters of the lithium bromide refrigerating unit and outputting comparison results;

and the output unit is used for outputting a third signal according to the comparison result.

6. The steam recycling system of claim 2, wherein the adjustment mechanism is a regulator valve.

7. The steam integrated utilization system of claim 1, further comprising:

and the pump is connected with the steam turbine and is used for driving according to the mechanical energy output by the steam turbine.

8. The steam integrated utilization system of claim 3, further comprising:

the pump detection mechanism is used for detecting the lift and the flow of the pump;

and the gearbox is used for adjusting the rotating speed of the pump according to the lift and the flow.

9. The steam integrated utilization system of claim 1, further comprising:

the generator is connected with the steam turbine and used for converting the mechanical energy generated by the steam turbine into electric energy.

10. The steam integrated utilization system of claim 1, further comprising:

and the second output pipeline is connected with the lithium bromide refrigerating unit and is used for transmitting the condensed water output by the lithium bromide refrigerating unit.

Background

The energy problem is one of the major social problems faced by countries in the world at present, and the rapid increase of population and economy aggravates the consumption and exhaustion of mineral energy, so that the environment is seriously polluted and damaged.

The regional centralized energy station runs in multiple modes of energy storage, multi-energy complementation and the like, and centralizes the regional cooling station and the heating station, so that the requirements of users for heat supply, refrigeration and the like can be met. If places which can generate high-grade steam such as a waste incineration plant, a power plant and the like are attached to the outside of the energy station, the energy station can utilize the steam of the waste power plant and a coal/gas power plant, adopts a lithium bromide absorption refrigerating unit for refrigeration, and can utilize hydrophobic hot water for heat supply.

In the related art, steam from a power plant passes through a temperature and pressure reducing device and is directly sent to a lithium bromide absorption refrigerating unit, so that the high grade of the steam is not fully utilized, and energy waste is caused. Steam that the power plant took out, in order to overcome pipe network resistance loss and heat dissipation, general grade is higher, and the second grade steam parameter of for example msw incineration power plant is: 1.1MPa, 290 ℃. And the steam parameters of the lithium bromide absorption type unit refrigeration meet 0.8MPa and 170 ℃. A large level difference exists between the two parts, and the steam is directly sent into the lithium bromide absorption refrigerating unit for refrigeration, thereby causing resource waste.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. Therefore, the steam comprehensive utilization system can recover partial steam enthalpy values, comprehensively utilize heat energy, improve energy utilization efficiency and avoid resource waste.

The steam comprehensive utilization system according to the embodiment of the application comprises:

a first input line for receiving high grade steam from a power plant;

a steam turbine connected to the first input line for receiving the high-grade steam from the power plant and converting steam heat energy of the high-grade steam into mechanical energy to convert the high-grade steam into low-grade steam;

a first output pipeline, wherein a first end of the first output pipeline is connected with the steam turbine;

and the lithium bromide refrigerating unit is connected with the second end of the first output pipeline and is used for refrigerating the low-grade steam output by the steam turbine to output condensed water.

The steam comprehensive utilization system according to the embodiment of the application has at least the following beneficial effects: high-grade steam from a power plant directly enters a steam turbine through a first input pipeline, the steam turbine applies work to convert heat energy in the high-grade steam into mechanical energy, and low-grade steam is obtained. And the low-grade steam is output to the lithium bromide refrigerating unit from the steam turbine through the first output pipeline, and the lithium bromide refrigerating unit is used for refrigerating according to the low-grade steam and outputting condensed water. Through the arrangement, the high-grade steam firstly drives the steam turbine to do work, the grade of the steam is reduced while the heat energy is converted into mechanical energy, the enthalpy value of part of the steam is recycled, the utilization efficiency of energy is improved, and the waste of resources is avoided.

According to some embodiments of the present application, the steam integrated utilization system further comprises:

the first end of the second input pipeline is connected with the first input pipeline, and the second end of the second input pipeline is connected with the lithium bromide refrigerating unit;

the first control mechanism is used for receiving and outputting a first signal according to the operating condition of the power plant;

and the adjusting mechanism is arranged on the second input pipeline and is used for adjusting the steam volume of the first input pipeline entering the second input pipeline according to the first signal.

According to some embodiments of the present application, the steam integrated utilization system further comprises:

the second control mechanism is used for receiving and outputting a second signal according to the operation condition of the steam turbine fed back by the steam turbine;

the adjusting mechanism is further used for receiving the second signal and adjusting the steam quantity entering the second input pipeline through the first input pipeline according to the second signal.

According to some embodiments of the present application, the steam integrated utilization system further comprises:

the third control mechanism is used for acquiring steam parameters fed back by the lithium bromide refrigerating unit and outputting a third signal according to the steam parameters and preset steam parameters of the lithium bromide refrigerating unit;

the adjusting mechanism is further used for receiving the third signal and adjusting the steam quantity entering the second input pipeline from the first input pipeline according to the third signal.

According to some embodiments of the present application, the third control mechanism comprises:

the acquisition unit is used for acquiring steam parameters of low-grade steam output by the lithium bromide refrigerating unit;

the comparison unit is used for comparing the steam parameters with preset steam parameters of the lithium bromide refrigerating unit and outputting comparison results;

and the output unit is used for outputting a third signal according to the comparison result.

According to some embodiments of the application, the adjustment mechanism is a regulator valve.

According to some embodiments of the present application, the steam integrated utilization system further comprises:

and the pump is connected with the steam turbine and is used for driving according to the mechanical energy output by the steam turbine.

According to some embodiments of the present application, the steam integrated utilization system further comprises:

the pump detection mechanism is used for detecting the lift and the flow of the pump;

and the gearbox is used for adjusting the rotating speed of the pump according to the lift and the flow.

According to some embodiments of the present application, the steam integrated utilization system further comprises:

the generator is connected with the steam turbine and used for converting the mechanical energy generated by the steam turbine into electric energy.

According to some embodiments of the present application, the steam integrated utilization system further comprises:

and the second output pipeline is connected with the lithium bromide refrigerating unit and is used for transmitting the condensed water output by the lithium bromide refrigerating unit.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic structural diagram of a steam comprehensive utilization system provided in an embodiment of the present application;

FIG. 2 is a schematic view showing a structure of a steam utilizing system in the related art;

FIG. 3 is a schematic structural diagram of a steam comprehensive utilization system provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a steam comprehensive utilization system provided in an embodiment of the present application.

Reference numerals: 100. a first input line; 200. a steam turbine; 300. a first output line; 400. a lithium bromide refrigeration unit; 500. a pressure reducing and temperature reducing device; 600. a second input line; 700. an adjustment mechanism; 800. a pump; 900. a gearbox; 1000. a generator; 1100. a second output line.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1, some embodiments of the present application provide a steam integrated utilization system including a first input line 100, a steam turbine 200, a first output line 300, and a lithium bromide refrigeration unit 400. A first input line 100 for receiving high-grade steam from a power plant; a steam turbine 200 is connected to the first input pipeline 100 for receiving high-grade steam from the power plant and converting steam heat energy in the high-grade steam into mechanical energy to convert the high-grade steam into low-grade steam; the first output pipeline 300 has a first end connected to the steam turbine 200 and a second end connected to the lithium bromide refrigeration unit 400, and is configured to transmit the low-grade steam output from the steam turbine 200 to the lithium bromide refrigeration unit 400. The lithium bromide refrigerating unit 400 is connected to a second end of the first output pipeline 300, and is configured to refrigerate the low-grade steam output by the steam turbine 200 to output condensed water.

According to the steam comprehensive utilization system provided by the embodiment of the application, high-grade steam from a power plant directly enters the steam turbine 200 through the first input pipeline 100, the steam turbine 200 works under the pushing of the steam to convert heat energy in the high-grade steam into mechanical energy, and low-grade steam is obtained. The low-grade steam is output from the steam turbine 200 to the lithium bromide refrigeration unit 400 through the first output pipeline 300, and the lithium bromide refrigeration unit 400 performs refrigeration according to the low-grade steam and outputs condensed water. Through the arrangement, the high-grade steam firstly drives the steam turbine 200 to do work, the grade of the steam is reduced while the heat energy is converted into mechanical energy, the enthalpy value of part of the steam is recycled, the utilization efficiency of energy is improved, and the waste of resources is avoided.

Specifically, referring to fig. 1 and 2, in the related art, high-grade steam from a power plant is directly sent to a lithium bromide absorption refrigeration unit after passing through a pressure reduction and temperature reduction device 500, and heat energy in the high-grade steam is not fully utilized, which causes waste of resources. Such as: the secondary steam parameters of the waste incineration power plant are as follows: 1.1MPa, 290 ℃. And the steam grade of the lithium bromide absorption type unit meets 0.8MPa and is only at 170 ℃. A large grade difference exists between the two parts, and the waste water can be recycled and comprehensively utilized. In the embodiment, the first input pipeline 100 is connected to a power plant and is used for receiving high-grade steam from the power plant and transmitting the high-grade steam to the steam turbine 200 to drive the steam turbine 200 to do work, so that part of heat energy in the high-grade steam is converted into mechanical energy, and the heat energy of the high-grade steam is correspondingly reduced, so that the high-grade steam is converted into low-grade steam. The low-grade steam is output from the steam turbine 200 to the lithium bromide refrigeration unit 400 through the first output pipeline 300, and the lithium bromide refrigeration unit 400 performs refrigeration according to the low-grade steam to obtain condensed water.

Referring to fig. 3, in some embodiments of the present application, the steam integrated utilization system further comprises: a second inlet line 600, a first control mechanism (not shown), and an adjustment mechanism 700. Wherein, the first end of the second input pipeline 600 is connected with the first input pipeline 100, and the second end is connected with the lithium bromide refrigerating unit 400; the first control mechanism is used for receiving and outputting a first signal according to the operating condition of the power plant; the adjusting mechanism 700 is disposed on the second input pipeline 600, and is configured to adjust the amount of steam entering the second input pipeline 600 from the first output pipeline 300 according to the first signal.

The second input pipeline 600 directly connects the lithium bromide refrigeration unit 400 with the first input pipeline 100, and high-grade steam from a power plant can directly enter the lithium bromide refrigeration unit 400, so that the low-grade steam output by the first output pipeline 300 does not meet the refrigeration requirement of the lithium bromide refrigeration unit 400. In addition, the adjusting mechanism 700 is disposed on the second input pipeline 600, so that the amount of steam entering the second input pipeline 600 from the first input pipeline 100 can be adjusted, and waste of resources can be avoided. The first control mechanism is used for receiving and outputting a first signal according to the operation condition of the power plant, and the adjusting mechanism 700 is used for adjusting the amount of steam entering the second input pipeline 600 from the first input pipeline 100 according to the first signal, so that the applicability of the comprehensive steam utilization system is enhanced.

Specifically, under general conditions, the operation condition of the power plant is stable, the grade of steam output by the power plant is stable, and the system can normally operate. During the design of the system, the specifications of the steam turbine 200, the lithium bromide refrigerating unit 400 and the like are matched with the grade of steam output by the power plant under the normal operation, and when the operation condition of the power plant is changed, the operation of the steam turbine 200, the lithium bromide refrigerating unit 400 and the like in the system is abnormal. The first control mechanism is used for receiving and outputting a first signal according to the operation condition of the power plant. If the power plant is in overload operation, the first signal output by the first control mechanism is to increase the adjustment amount, so that the adjustment mechanism 700 increases the amount of steam entering the second input pipeline 600 from the first input pipeline 100 to prevent the turbine 200 from operating in overload; if the power plant has reduced output power, the first signal output by the first control means is a reduction of the manipulated variable, so that the control means 700 reduces the steam quantity from the first supply line 100 into the second supply line 600.

It will be appreciated that the first control means may set the level of the first signal in dependence of the actual operating conditions of the plant, in order for the adjustment means 700 to adjust the amount of steam entering the first inlet line 100 into the second inlet line 600. Such as: five levels are set according to the first signal of the actual operation condition of the power plant, the first level corresponds to the load operation of the highest level of the power plant, the opening degree of the adjusting mechanism 700 is 100%, and the steam quantity of the first input pipeline 100 entering the second input pipeline 600 reaches the maximum value; the second stage corresponds to the next higher load operation of the power plant, in which case the steam quantity entering the second inlet line 600 from the first inlet line 100 is reduced compared to the first stage, corresponding to an opening of 75% for the regulating member 700; the third level is a normal operation state, in which the steam amount entering the second input pipeline 600 from the first input pipeline 100 is in a normal state corresponding to the opening degree of the adjusting mechanism 700 being 50%; the fourth level is a second low power operating state, corresponding to an opening of 25% of the regulating mechanism 700, to reduce the amount of steam entering the second inlet line 600 from the first inlet line 100; the fifth level is the lowest power operation state, in which the opening degree of the adjusting mechanism 700 is 0, the adjusting mechanism 700 is completely closed, and the amount of steam entering the second input pipeline 600 from the first input pipeline 100 is 0.

In some embodiments of the present application, the steam integrated utilization system further comprises a second control mechanism (not shown). The second control mechanism is used for receiving and outputting a second signal according to the operation condition of the steam turbine 200 fed back by the steam turbine 200; the adjusting mechanism 700 is further configured to receive the second signal and adjust the amount of steam entering the second input line 600 from the first input line 100 according to the second signal.

Through setting up like this, not only can prevent that turbine 200 from appearing the overload operation, causing turbine 200 to damage or take place the incident, can prevent again that too much direct entering lithium bromide refrigerating unit 400 of high-grade steam from leading to the waste of resource.

Specifically, a second control mechanism is arranged to receive the operation condition of the steam turbine 200, and output a second signal according to the operation condition of the steam turbine 200, and the amount of steam entering the second input pipeline 600 from the first input pipeline 100 can be adjusted in real time through the adjusting mechanism 700, and the second signal may be output by the second control mechanism according to the feedback operation condition fed back by the steam turbine 200 itself, or may be a detection signal obtained by the second control mechanism actively detecting the operation condition of the steam turbine 200, and output the second signal according to the obtained detection signal. Such as: when the turbine 200 is overloaded, the turbine 200 feeds back its own operation condition as the overloaded operation, and the second control mechanism outputs the second signal to increase the opening degree of the adjusting mechanism 700, so as to increase the amount of steam entering the second input pipeline 600 from the first input pipeline 100. Such as: if the turbine 200 is operating normally, the second signal output by the second control mechanism is not adjusted. Such as: in the case of low power output of the steam turbine 200, the grade of the steam may decrease, and the second control mechanism outputs the second signal to decrease the opening of the adjusting mechanism 700 so as to decrease the amount of the steam entering the second input pipeline 600 from the first input pipeline 100.

In some embodiments of the present application, the steam integrated utilization system further comprises: a third control mechanism (not shown). The third control mechanism is used for acquiring steam parameters fed back by the lithium bromide refrigerating unit 400 and outputting a third signal according to the steam parameters and preset steam parameters of the lithium bromide refrigerating unit; the adjusting mechanism 700 is further configured to receive the third signal and adjust the amount of steam entering the second input line 600 from the first input line 100 according to the third signal.

Through setting up like this, can guarantee that lithium bromide refrigerating unit 400 normally works, can not appear the condition that can not work because the steam parameter is low excessively, also can avoid the too high condition that the wasting of resources appears of steam parameter.

Specifically, a third control mechanism is arranged to receive steam parameters of the lithium bromide refrigerating unit 400, and then a third signal is output according to the steam parameters and preset steam parameters of the lithium bromide refrigerating unit, the steam quantity of the first input pipeline 100 entering the second input pipeline 600 can be adjusted through the adjusting mechanism 700 in real time, the third signal can be steam parameters fed back by the lithium bromide refrigerating unit 400, and then signals output according to the steam parameters and the preset parameters of the lithium bromide refrigerating unit, or the third control mechanism can actively detect the obtained steam parameters of the lithium bromide refrigerating unit, and then signals output according to the steam parameters and the preset parameters of the lithium bromide refrigerating unit. Such as: the steam entering the lithium bromide refrigeration unit 400 is of too high grade, and the third signal is to reduce the opening degree of the adjusting mechanism 700, so as to reduce the amount of steam entering the second input pipeline 600 from the first input pipeline 100. Such as: the grade of the steam entering the lithium bromide refrigeration unit 400 is too low, and the third signal is to increase the opening degree of the adjusting mechanism 700, so as to increase the amount of the steam entering the second input pipeline 600 from the first input pipeline 100.

In some embodiments of the present application, the third control mechanism comprises: the device comprises an acquisition unit, a comparison unit and an output unit. The acquisition unit is used for acquiring steam parameters of low-grade steam output by the lithium bromide refrigerating unit 400; the comparison unit is used for comparing the steam parameters with preset steam parameters of the lithium bromide refrigerating unit and outputting comparison results; the output unit is used for outputting a third signal according to the comparison result.

Specifically, if the steam parameter of the low-grade steam is lower than the preset steam parameter of the lithium bromide refrigeration unit, the comparison result is lower than the preset value, and the third signal is to increase the opening degree of the adjusting mechanism 700; if the steam parameters of the low-grade steam are more than the preset steam parameters of the lithium bromide refrigerating unit, the comparison result is that the steam parameters are higher than the preset value, and the third signal is to reduce the opening degree of the adjusting mechanism 700.

In some embodiments of the present application, the adjustment mechanism 700 is a regulator valve.

Referring to fig. 4, in some embodiments of the present application, the steam integrated utilization system further comprises: a pump 800. The pump 800 is connected to the steam turbine 200 and is driven according to the mechanical energy output from the steam turbine 200. Through the arrangement, the mechanical energy output by the steam turbine 200 drives the pump 800 to drive, and the utilization efficiency of energy is improved.

The pump 800 may be a cooling water pump of a cooling water circulation system of a power plant, a pump of a driving pipe network system, or a cooling water pump of a lithium bromide cooling water circulation system. A pipe network system: and the pipeline system is connected with the energy station and the user side heat exchange station.

In some embodiments of the present application, the steam integrated utilization system further comprises: pump 800 detects a mechanism (not shown) and gearbox 900. The pump 800 detecting mechanism is used for detecting the lift and the flow of the pump 800, and the gearbox 900 is used for adjusting the rotating speed of the pump 800 according to the lift and the flow.

When the water amount in the cooling water circulation system in the pipe network system or the power plant changes, the lift and the flow rate of the pump 800 change correspondingly, and therefore, the lift and the flow rate of the pump 800 need to be adjusted by adjusting the rotation speed of the pump 800. The gearbox 900 is arranged to adjust the rotation speed of the pump 800, so that the pump 800 is more suitable for a pipe network system or a cooling water circulation system.

In some embodiments of the present application, the steam integrated utilization system further comprises: a generator 1000. The generator 1000 is connected to the turbine 200 for converting mechanical energy generated by the turbine 200 into electrical energy. By arranging the generator 1000, the mechanical energy generated by the steam turbine 200 is used for generating electricity, so that the consumption of the electric energy of the energy station is reduced, and the utilization efficiency of the energy is improved.

Such as: the secondary steam parameters of the waste incineration power plant are as follows: the refrigeration capacity of the lithium bromide absorption type unit is 4220kW at the temperature of 1.1MPa and 290 ℃, and the steam grade is required to be 0.8MPa and 170 ℃. The steam comprehensive utilization system of the embodiment of the application conveys high-grade steam output by a power plant into the steam turbine 200, and the steam turbine 200 can obtain 190kW of energy according to the work of the high-grade steam. The cooling water pump 800 of the lithium bromide absorption refrigeration unit consumes 120kW of energy, and the mechanical energy obtained by the steam turbine 200 by applying work is 70kW of energy used for the generator 1000 to generate electricity in addition to the cooling water pump 800. By the arrangement, the waste of high-grade steam is avoided, the consumption of electric energy of the energy station is reduced, and the utilization efficiency of energy is improved.

In some embodiments of the present application, the steam integrated utilization system further comprises: a second output line 1100. The second output pipeline 1100 is connected to the lithium bromide refrigeration unit 400, and is configured to transmit condensed water output by the lithium bromide refrigeration unit 400.

It can be understood that the condensed water output by the second output pipeline 1100 has a certain temperature, and can be used for supplying heat to users by a heating system and can be recycled to a power plant for reuse.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.