CN221279698U - Circulating ammonia water waste heat recycling system - Google Patents

Circulating ammonia water waste heat recycling system Download PDF

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Publication number
CN221279698U
CN221279698U CN202323054289.9U CN202323054289U CN221279698U CN 221279698 U CN221279698 U CN 221279698U CN 202323054289 U CN202323054289 U CN 202323054289U CN 221279698 U CN221279698 U CN 221279698U
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China
Prior art keywords
water
pipe
circulating
distributor
storage tank
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CN202323054289.9U
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Chinese (zh)
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高博
黄保光
王龙
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Shenhua Bayannur Energy Co Ltd
National Energy Group Coal Coking Co Ltd
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Shenhua Bayannur Energy Co Ltd
National Energy Group Coal Coking Co Ltd
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Abstract

The utility model discloses a circulating ammonia water waste heat recycling system, which comprises a lithium bromide unit, an ammonia water circulating pipeline, a cooling water circulating pipeline, a water storage tank and a heat exchanger, wherein the lithium bromide unit is connected with the ammonia water circulating pipeline; the ammonia water circulating pipeline is connected with a generator of the lithium bromide unit, and the cooling water circulating pipeline is connected with a condenser of the lithium bromide unit; the water storage tank is internally provided with an upper water distributor and a lower water distributor, a circulating water pipe is connected between the upper water distributor and the lower water distributor, and the heat exchanger is connected in series on the circulating water pipe; a first cooling pipe is connected between the evaporator of the lithium bromide unit and the lower water distributor; the first return pipe is connected between the evaporator and the upper water distributor, so that the cold produced by the lithium bromide unit can be stored in the water storage tank, and the cold can be supplied to the user side through the heat exchanger for cooling, so that the lithium bromide unit can continuously recover the heat of ammonia water without stopping, the heat capacity of recovering the heat of the ammonia water is greatly improved, and the waste of the heat of the ammonia water is avoided.

Description

Circulating ammonia water waste heat recycling system
Technical Field
The utility model relates to the technical field of ammonia water waste heat utilization in coking industry, in particular to a circulating ammonia water waste heat recycling system.
Background
In the coal coking industry, ammonia water is adopted to take away heat of raw gas, in order to recover part of the heat, a lithium bromide unit is often adopted to recover the heat, then refrigeration is carried out, and then cooling capacity is supplied to a user side, such as an air conditioner, a cooling process and the like.
The lithium bromide unit is a relatively mature technology and comprises an absorber, a generator, a condenser, an evaporator, a booster pump, a throttle valve and the like which are sequentially connected. The generator has lithium bromide solution therein. The ammonia water circulation pipeline is connected with the generator to absorb the heat of the ammonia water. The cooling water circulation pipeline of the cooling tower is connected with the condenser and is used for taking away the heat of the condenser. The waterway of the user side is connected with the evaporator to absorb the cold energy of the evaporator so as to cool the user side.
In the prior art, a lithium bromide unit utilizes the heat of ammonia water for refrigeration and is continuously supplied to a user side. If the user end does not use cold or the used cold is small, the cold produced by the lithium bromide unit can be released, or the machine is stopped, and the heat of the ammonia water is not recovered continuously, so that energy waste is caused.
In view of the above, it is necessary to provide a circulating ammonia water waste heat recovery and utilization system with an energy storage function.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art and provides a circulating ammonia water waste heat recycling system with an energy storage function.
The technical scheme of the utility model provides a circulating ammonia water waste heat recycling system, which comprises a lithium bromide unit, an ammonia water circulating pipeline, a cooling water circulating pipeline, a water storage tank and a heat exchanger for exchanging heat with a user side;
The ammonia water circulating pipeline is connected with a generator of the lithium bromide unit, and the cooling water circulating pipeline is connected with a condenser of the lithium bromide unit;
The water storage tank is internally provided with an upper water distributor and a lower water distributor, a circulating water pipe is connected between the upper water distributor and the lower water distributor, the heat exchanger is connected in series on the circulating water pipe, and the circulating water pipe is provided with a bidirectional water pump and an electric control valve;
A first cooling pipe is connected between the evaporator of the lithium bromide unit and the lower water distributor, and the first cooling pipe is provided with a water supply pump and at least one electric control valve;
A first return pipe is connected between the evaporator and the upper water distributor, and a return pump and at least one electric control valve are arranged on the first return pipe.
In one optional technical scheme, the first cooling pipe is connected with a second cooling pipe for directly cooling the cold end, the connection point of the second cooling pipe and the first cooling pipe is positioned between the water supply pump and the lower water distributor, and the second cooling pipe is provided with at least one electric control valve;
The first return pipe is connected with a second return pipe for returning from the cold end, the connection point of the second return pipe and the first return pipe is positioned between the return pump and the upper water distributor, and at least one electric control valve is arranged on the second return pipe.
In one optional technical scheme, the water storage tank comprises a plurality of water storage tanks and a plurality of heat exchangers;
The lower water distributor of each water storage tank is connected with the evaporator through a first cold supply pipe, and the upper water distributor of each water storage tank is connected with the evaporator through a first return pipe;
and the circulating water pipe of each water storage tank is connected with one heat exchanger in series.
In one optional technical scheme, two sides of the circulating water pipe, which are positioned on the heat exchanger, are respectively provided with the two-way water pump and the electric control valve.
In one optional technical scheme, the circulating water pipe is connected with a plurality of heat exchangers in series.
In one optional technical scheme, the bidirectional water pump, the water supply pump and the reflux pump are all variable-frequency water pumps.
In one optional technical scheme, the electric control valve is an electromagnetic control valve.
In one optional technical scheme, a temperature sensor is arranged in the water storage tank.
In one optional technical scheme, a first heat supply pipe is connected between the condenser and the upper water distributor, and the first heat supply pipe is provided with the water supply pump and at least one electric control valve;
A third return pipe is connected between the condenser and the lower water distributor, and the third return pipe is provided with a return pump and at least one electric control valve.
In one optional technical scheme, the water storage tank comprises a plurality of water storage tanks and a plurality of heat exchangers;
The upper water distributor of each water storage tank is connected with the condenser through a first heat supply pipe, and the lower water distributor of each water storage tank is connected with the condenser through a third return pipe;
and the circulating water pipe of each water storage tank is connected with one heat exchanger in series.
By adopting the technical scheme, the method has the following beneficial effects:
the circulating ammonia water waste heat recycling system provided by the utility model is provided with the water storage tank and the heat exchanger, the lower water distributor of the water storage tank is connected with the evaporator through the first cooling pipe, and the upper water distributor of the water storage tank is connected with the evaporator through the first return pipe so as to realize water circulation, thereby storing cold water in the water storage tank. A circulating water pipe is connected between the lower water distributor and the upper water distributor, and the heat exchanger is connected in series on the circulating water pipe. The user side waterway of the user side is connected with the heat exchanger.
When the water storage tank is used for storing cold, hot water in the water storage tank enters the evaporator through the upper water distributor and the first return pipe to exchange heat and cool, and cooled cold water returns to the water storage tank through the first cold supply pipe and the lower water distributor.
When the user side needs to be cooled, cold water in the water storage tank enters the circulating water pipe from the lower water distributor, and then the water in the waterway of the user side is cooled in the heat exchanger so as to cool the user side. The water after heat exchange returns to the water storage tank through the upper water distributor.
Therefore, the circulating ammonia water waste heat recycling system provided by the utility model has an energy storage function, can store the cold energy produced by absorbing the heat of ammonia water by the lithium bromide unit into the water storage tank, can supply the cold energy to the user side for cooling by the heat exchanger, can store the cold energy produced by the lithium bromide unit by the water storage tank when the user side is not used for cooling or the used cold energy is small, does not need to be stopped, can continuously recover the heat of the ammonia water, greatly improves the capacity of recovering the heat of the ammonia water, and avoids the waste of the heat of the ammonia water.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. It should be understood that: the drawings are for illustrative purposes only and are not intended to limit the scope of the present utility model. In the figure:
Fig. 1 is a schematic diagram of a circulating ammonia waste heat recovery and utilization system according to an embodiment of the present utility model.
Detailed Description
Specific embodiments of the present utility model will be further described below with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
As shown in fig. 1, the circulating ammonia waste heat recycling system provided by an embodiment of the utility model comprises a lithium bromide unit 1, an ammonia circulating pipeline 2, a cooling water circulating pipeline 3, a water storage tank 4 and a heat exchanger 5 for exchanging heat with a user side.
The ammonia water circulation pipeline 2 is connected with a generator 12 of the lithium bromide unit 1, and the cooling water circulation pipeline 3 is connected with a condenser 13 of the lithium bromide unit 1.
The water storage tank 4 is provided with an upper water distributor 42 and a lower water distributor 41, a circulating water pipe 43 is connected between the upper water distributor 42 and the lower water distributor 41, the heat exchanger 5 is connected in series on the circulating water pipe 43, and the circulating water pipe 43 is provided with a bidirectional water pump 6 and an electric control valve 7.
A first cooling pipe 10 is connected between the evaporator 14 and the lower water distributor 41 of the lithium bromide unit 1, and a water supply pump 8 and at least one electric control valve 7 are arranged on the first cooling pipe 10.
A first return pipe 20 is connected between the evaporator 14 and the upper water distributor 42, and a return pump 9 and at least one electric control valve 7 are arranged on the first return pipe 20.
The utility model provides a circulating ammonia water waste heat recycling system which comprises a lithium bromide unit 1, an ammonia water circulating pipeline 2, a cooling water circulating pipeline 3, a water storage tank 4, a heat exchanger 5, a bidirectional water pump 6, an electric control valve 7, a water supply pump 8, a reflux pump 9 and the like.
The lithium bromide unit 1 comprises an absorber 11, a generator 12, a condenser 13, an evaporator 14, a liquid pump, a throttle valve, etc., which are the contents of the prior art, and the working process thereof is referred to the description of the prior art and will not be repeated herein.
The ammonia water circulation pipeline 2 is connected between an ammonia water pipe of the coke system and the generator 12 and is used for inputting ammonia water with heat into the generator 12, heating lithium bromide solution in the generator 12 and outputting the cooled ammonia water to a designated place through the ammonia water circulation pipeline 2.
The cooling water circulation pipeline 3 is connected between the cooling tower and the condenser 13 and is used for cooling and condensing the water vapor in the condenser 13. The cooling water is introduced into the condenser 13 for use in cooling the lithium bromide unit 1 in summer.
The water storage tank 4 is provided with a lower water distributor 41 and an upper water distributor 42, cold water has a higher density than hot water, and the cold water is arranged below the hot water. Cold water enters and exits the water storage tank 4 through the lower water distributor 41, and hot water enters and exits the water storage tank 4 through the upper water distributor 42.
A circulating water pipe 43 is connected between the upper water distributor 42 and the lower water distributor 41, the circulating water pipe 43 is positioned outside the water storage tank 4, and the heat exchanger 5 is connected in series on the circulating water pipe 43. The heat exchanger 5 is used for being connected with a waterway of the user end so as to cool the user end. The circulating water pipe 43 is provided with a bidirectional water pump 6 and an electric control valve 7. The bi-directional water pump 6 is used to power the water in the circulation pipe 43. The bidirectional water pump 6 can pump cold water out of the lower water distributor 41, and return to the water storage tank 4 through the circulating water pipe 43 and the upper water distributor 42. The bidirectional water pump 6 can also pump hot water out of the upper water distributor 42 and return to the water storage tank 4 through the circulating water pipe 43 and the lower water distributor 41. The electric control valve 7 can be automatically controlled to be opened and closed by a control system of the circulating ammonia water waste heat recycling system so as to control the on-off of the circulating water pipe 43.
The evaporator 14 is connected with the lower water distributor 41 through the first cooling pipe 10, and the evaporator 14 is connected with the upper water distributor 42 through the first return pipe 20. The first cooling pipe 10 and the first return pipe 20 constitute a circulation line connected between the evaporator 14 and the water storage tank 4 for accumulating cold for the water storage tank 4. The first cooling pipe 10 is provided with a water supply pump 8 and at least one electric control valve 7, and the first return pipe 20 is provided with a return pump 9 and at least one electric control valve 7. The water supply pump 8 powers the water flow in the first supply line 10 and the return pump 9 powers the water flow in the first return line 20. The electric control valve 7 is used for switching on and off each water pipe.
When the water storage tank 4 is used for cold storage in summer, hot water in the water storage tank 4 enters the evaporator 14 through the upper water distributor 42 and the first return pipe 20 to exchange heat and cool, and cooled cold water returns to the water storage tank 4 through the first cold supply pipe 10 and the lower water distributor 41.
When the user side needs to be cooled, cold water in the water storage tank 4 enters the circulating water pipe 43 from the lower water distributor 41, and then water in the waterway of the user side is cooled in the heat exchanger 5 so as to cool the user side. The water after heat exchange returns to the water storage tank 4 through the upper water distributor 42.
Therefore, the circulating ammonia water waste heat recycling system provided by the utility model has an energy storage function, can store the cold energy produced by the lithium bromide unit 1 absorbing the heat of the ammonia water into the water storage tank 4, can supply the cold energy to the user side for cooling through the heat exchanger 5, can store the cold energy produced by the lithium bromide unit 1 through the water storage tank 4 when the user side is not cooled or the used cold energy is small, does not need to be stopped, can continuously recover the heat of the ammonia water, greatly improves the capacity of recovering the heat of the ammonia water, and avoids the waste of the heat of the ammonia water.
In one embodiment, as shown in fig. 1, the first cooling pipe 10 is connected with a second cooling pipe 30 for directly cooling the cold end, a connection point between the second cooling pipe 30 and the first cooling pipe 10 is located between the water supply pump 8 and the lower water distributor 41, and at least one electric control valve 7 is arranged on the second cooling pipe 30.
The first return pipe 20 is connected with a second return pipe 40 for returning from the cold end, the connection point of the second return pipe 40 and the first return pipe 20 is positioned between the return pump 9 and the upper water distributor 42, and at least one electric control valve 7 is arranged on the second return pipe 40.
In this embodiment, the second cold supply pipe 30 and the second return pipe 40 are configured to directly supply cold to the cold end, and the cold supply is more direct.
Specifically, the water inlet end of the second cooling pipe 30 is connected to the first cooling pipe 10, and the connection point is located between the water supply pump 8 and the lower water distributor 41, and the water supply pump 8 provides power for the flow of water in the second cooling pipe 30. The second cooling pipe 30 is provided with at least one electric control valve 7 for controlling the on-off of the second cooling pipe 30. The water outlet end of the second cold supply pipe 30 is directly connected with a water path with a cold end.
The water outlet end of the second return pipe 40 is connected with the first return pipe 20, the connection point is positioned between the return pump 9 and the upper water distributor 42, and the return pump 9 supplies power for the flow of water of the second return pipe 40. The second return pipe 40 is provided with at least one electric control valve 7 for controlling the on-off of the second return pipe 40. The water inlet end of the second cold supply pipe 30 is directly connected with the water path of the cold end.
The user can adopt catch basin 4 alone to supply cold junction cooling as required, also can select to adopt second cooling pipe 30 alone to supply cold junction cooling, also can adopt catch basin 4 and second cooling pipe 30 to supply cold junction cooling simultaneously.
According to the requirement, proportional regulating valves can be respectively arranged at the connection part of the second cold supply pipe 30 and the first cold supply pipe 10 and the connection part of the second return pipe 40 and the first return pipe 20 so as to regulate the water flow in each pipeline.
In one embodiment, a plurality of water reservoirs 4 and a plurality of heat exchangers 5 are included.
The lower water distributor 41 of each water storage tank 4 is connected with the evaporator 14 through a first cooling pipe 10, and the upper water distributor 42 of each water storage tank 4 is connected with the evaporator 14 through a first return pipe 20. A heat exchanger 5 is connected in series with the circulating water pipe 43 of each water storage tank 4.
In the present embodiment, by disposing the plurality of water reservoirs 4 in parallel with the evaporator 14, the cold storage capacity is improved, and more cold energy can be stored.
In one embodiment, as shown in fig. 1, two sides of the circulating water pipe 43, which are located at the heat exchanger 5, are respectively provided with a bidirectional water pump 6 and an electric control valve 7.
By configuring two bidirectional water pumps 6, the water circulation capacity in the circulation water pipe 43 is improved by synchronous opening. By configuring the two electric control valves 7, the safety of closing the circulation water pipe 43 is improved.
In one embodiment, the circulating water pipe 43 is connected with a plurality of heat exchangers 5 in series, and the heat exchangers can be respectively connected with pipelines in different areas to meet various demands of users.
In one embodiment, the bidirectional water pump 6, the water supply pump 8 and the reflux pump 9 are all variable frequency water pumps, and the rotation frequency can be adjusted according to the requirement to adjust the water pumping capacity.
In one embodiment, the electric control valve 7 is an electromagnetic control valve, so that the technology is mature and the use is convenient.
In one embodiment, as shown in fig. 1, a temperature sensor 44 is provided in the water storage tank 4 for monitoring the water temperature in the water storage tank 4 to determine whether the water temperature requirement of the user is met.
In one embodiment, as shown in fig. 1, a first heat supply pipe 50 is connected between the condenser 13 and the upper water distributor 42, and a water supply pump 8 and at least one electric control valve 7 are disposed on the first heat supply pipe 50.
A third return pipe 60 is connected between the condenser 13 and the lower water distributor 41, and a return pump 9 and at least one electric control valve 7 are arranged on the third return pipe 60.
In the present embodiment, the first heat supply pipe 50 and the third return pipe 60 connect the condenser 13 with the water storage tank 4, so that the heat storage function can be realized.
At the time of heat accumulation, the cooling water circulation line 3 is closed.
The upper water distributor 42 is connected with the condenser 13 through a first heat supply pipe 50, and hot water is supplied to the upper water distributor 42 through the first heat supply pipe 50.
The lower water distributor 41 is connected with the condenser 13 through a third return pipe 60, and cold water returns to the condenser 13 through the third return pipe 60 for heat exchange.
The first heat supply pipe 50 is provided with a water supply pump 8, and the third return pipe 60 is provided with a return pump 9. The water supply pump 8 powers the flow of water in the first heat supply pipe 50 and the return pump 9 powers the flow of water in the third return pipe 60. The electric control valve 7 is used for controlling the on-off of each pipeline.
When the water storage tank 4 is used for heat storage in winter, cold water in the water storage tank 4 enters the condenser 13 through the lower water distributor 41 and the third return pipe 60 to exchange heat and raise temperature, and heated hot water returns to the water storage tank 4 through the first heat supply pipe 50 and the upper water distributor 42.
When the heat is needed to be supplied to the user side, the hot water in the water storage tank 4 enters the circulating water pipe 43 from the upper water distributor 42, and then the water in the waterway of the user side is heated in the heat exchanger 5 so as to heat the user side. The water after heat exchange returns to the water storage tank 4 through the lower water distributor 41.
In one embodiment, a plurality of water reservoirs 4 and a plurality of heat exchangers 5 are included.
The upper water distributor 42 of each water storage tank 4 is connected with the condenser 13 through a first heat supply pipe 50, and the lower water distributor 41 of each water storage tank 4 is connected with the condenser 13 through a third return pipe 60.
A heat exchanger 5 is connected in series with the circulating water pipe 43 of each water storage tank 4.
In the present embodiment, by disposing a plurality of water storage tanks 4 in parallel with the evaporator 14, the heat storage capacity is improved, and more heat can be stored.
The above technical schemes can be combined according to the need to achieve the best technical effect.
The foregoing is only illustrative of the principles and preferred embodiments of the present utility model. It should be noted that several other variants are possible to those skilled in the art on the basis of the principle of the utility model and should also be considered as the scope of protection of the present utility model.

Claims (10)

1. The circulating ammonia water waste heat recycling system is characterized by comprising a lithium bromide unit, an ammonia water circulating pipeline, a cooling water circulating pipeline, a water storage tank and a heat exchanger for exchanging heat with a user side;
The ammonia water circulating pipeline is connected with a generator of the lithium bromide unit, and the cooling water circulating pipeline is connected with a condenser of the lithium bromide unit;
The water storage tank is internally provided with an upper water distributor and a lower water distributor, a circulating water pipe is connected between the upper water distributor and the lower water distributor, the heat exchanger is connected in series on the circulating water pipe, and the circulating water pipe is provided with a bidirectional water pump and an electric control valve;
A first cooling pipe is connected between the evaporator of the lithium bromide unit and the lower water distributor, and the first cooling pipe is provided with a water supply pump and at least one electric control valve;
A first return pipe is connected between the evaporator and the upper water distributor, and a return pump and at least one electric control valve are arranged on the first return pipe.
2. The circulating ammonia water waste heat recycling system according to claim 1, wherein,
The first cooling pipe is connected with a second cooling pipe for directly cooling the cold end, the connection point of the second cooling pipe and the first cooling pipe is positioned between the water supply pump and the lower water distributor, and the second cooling pipe is provided with at least one electric control valve;
The first return pipe is connected with a second return pipe for returning from the cold end, the connection point of the second return pipe and the first return pipe is positioned between the return pump and the upper water distributor, and at least one electric control valve is arranged on the second return pipe.
3. The circulating ammonia water waste heat recovery and utilization system according to claim 1, comprising a plurality of the water reservoirs and a plurality of the heat exchangers;
The lower water distributor of each water storage tank is connected with the evaporator through a first cold supply pipe, and the upper water distributor of each water storage tank is connected with the evaporator through a first return pipe;
and the circulating water pipe of each water storage tank is connected with one heat exchanger in series.
4. The circulating ammonia water waste heat recycling system according to claim 1, wherein,
And the two sides of the circulating water pipe, which are positioned on the heat exchanger, are respectively provided with the two-way water pump and the electric control valve.
5. The circulating ammonia water waste heat recycling system according to claim 1, wherein,
And the circulating water pipe is connected with a plurality of heat exchangers in series.
6. The circulating ammonia water waste heat recycling system according to claim 1, wherein,
The bidirectional water pump, the water supply pump and the reflux pump are all variable-frequency water pumps.
7. The circulating ammonia water waste heat recovery and utilization system according to claim 2, wherein,
The electric control valve is an electromagnetic control valve.
8. The circulating ammonia water waste heat recycling system according to claim 1, wherein,
And a temperature sensor is arranged in the water storage tank.
9. The circulating ammonia water waste heat recovery and utilization system according to any one of claims 1-8, wherein a first heat supply pipe is connected between the condenser and the upper water distributor, and the first heat supply pipe is provided with the water supply pump and at least one electric control valve;
A third return pipe is connected between the condenser and the lower water distributor, and the third return pipe is provided with a return pump and at least one electric control valve.
10. The circulating ammonia water waste heat recovery and utilization system according to claim 9, wherein the upper water distributor of each water storage tank is connected with the condenser through one first heat supply pipe, and the lower water distributor of each water storage tank is connected with the condenser through one third return pipe.
CN202323054289.9U 2023-11-10 Circulating ammonia water waste heat recycling system Active CN221279698U (en)

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CN221279698U true CN221279698U (en) 2024-07-05

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