CN216744978U - Absorption type unit and waste heat recovery system - Google Patents
Absorption type unit and waste heat recovery system Download PDFInfo
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- CN216744978U CN216744978U CN202220403535.3U CN202220403535U CN216744978U CN 216744978 U CN216744978 U CN 216744978U CN 202220403535 U CN202220403535 U CN 202220403535U CN 216744978 U CN216744978 U CN 216744978U
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- absorber
- pipeline
- generator
- evaporator
- condenser
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 42
- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000006096 absorbing agent Substances 0.000 claims abstract description 48
- 239000003507 refrigerant Substances 0.000 claims abstract description 43
- 239000000498 cooling water Substances 0.000 claims description 48
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 239000000295 fuel oil Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 2
- 230000002528 anti-freeze Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 description 56
- 238000005057 refrigeration Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Sorption Type Refrigeration Machines (AREA)
Abstract
The application relates to an absorption type unit and a waste heat recovery system, wherein the absorption type unit comprises a generator, a condenser, an evaporator and an absorber; the refrigerant water outlet of the condenser is communicated with the evaporator through a first pipeline, and the refrigerant water outlet of the condenser is also introduced into the generator together with the dilute solution of the absorber through a second pipeline. The absorption type unit can recover all heat of the driving heat source, and can simplify the whole structure of the system and reduce the cost.
Description
Technical Field
The application relates to the technical field of waste heat recovery, in particular to an absorption unit and a waste heat recovery system.
Background
A large amount of various waste heat is discharged in the production process of industries such as steel and petroleum smelting, and the waste heat can be used as a driving heat source and utilized by an absorption unit to meet the requirements of process cooling, heating, air conditioning refrigeration and heating. In some cases, the waste heat needs to be fully utilized, but the driving heat source may not be fully consumed in the low load of the absorption unit, and at this time, an additional external cooling device needs to be arranged to consume the redundant waste heat to meet the production requirement, so that the system structure is complex and the cost is high.
Therefore, how to provide an absorption unit that can recover all the heat of the driving heat source, simplify the overall system structure, and reduce the cost is a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The purpose of this application is to provide an absorption formula unit and waste heat recovery system, can retrieve the whole heat of drive heat source to can simplify system overall structure, reduce cost.
In order to solve the technical problem, the application provides an absorption type unit, which comprises a generator, a condenser, an evaporator and an absorber; the refrigerant water outlet of the condenser is communicated with the evaporator through a first pipeline, and the refrigerant water outlet of the condenser is also introduced into the generator together with the dilute solution of the absorber through a second pipeline.
The refrigerant water generated by the condenser is discharged from the refrigerant water outlet, and then can be introduced into the evaporator through the first pipeline, and can also be introduced into the generator together with the dilute solution of the absorber through the second pipeline. By the arrangement, the heat of the driving heat source can be completely consumed under any load condition of the absorption unit.
When the purpose of consuming the driving heat source is partially taken, the absorption unit provided by the embodiment can completely consume the heat of the driving heat source, and does not need to be additionally provided with external cooling equipment, so that the overall structure of the waste heat recovery system can be simplified, the field arrangement condition is simplified, and the cost is reduced.
Optionally, the refrigerant water outlet of the condenser is in communication with the absorber via a second line.
Optionally, the first pipeline and the second pipeline are respectively provided with a regulating valve for regulating flow.
Optionally, the evaporator further comprises a temperature controller, wherein the temperature controller is used for adjusting the opening degree of each adjusting valve according to the temperature difference between the cold water inlet and the cold water outlet of the evaporator.
Optionally, the system further comprises a heat exchange portion, a concentrated solution pipeline and a dilute solution pipeline are communicated between the absorber and the generator, the dilute solution in the absorber can be introduced into the generator along the dilute solution pipeline, and the concentrated solution in the generator can be introduced into the absorber along the concentrated solution pipeline; the cooling pipeline of the heat exchange part is communicated with the dilute solution pipeline, and the heat supply pipeline of the heat exchange part is communicated with the concentrated solution pipeline.
Optionally, the absorber and the condenser are respectively provided with a cooling water inlet, and the cooling water inlet of the condenser and the cooling water inlet of the absorber are connected in series or in parallel.
Optionally, the evaporator is a two-stage evaporator;
and/or, the absorber is a two-stage absorber;
and/or the generator is a multi-stage generator.
The utility model also provides a waste heat recovery system which comprises the absorption unit, wherein a driving heat source is communicated with the heat source inlet of the generator and used for supplying heat to the generator so as to heat and concentrate the dilute solution in the generator into the concentrated solution.
The technical effect of the waste heat recovery system with the absorption unit is similar to that of the absorption unit, and is not repeated herein for saving space.
Optionally, the driving heat source is steam, hot water, conduction oil, flue gas, natural gas, artificial gas, light oil or heavy oil.
Optionally, the system further comprises a cold water device, wherein the cold water device is communicated with the cold water inlet of the evaporator and is used for introducing cold water into the cold water inlet, and the cold water is mixed with an antifreezing agent.
Drawings
Fig. 1 is a schematic structural diagram of an absorption unit according to an embodiment of the present disclosure.
In fig. 1, the reference numerals are illustrated as follows:
1-generator, 11-heat source inlet, 12-heat source outlet;
2-condenser, 21-refrigerant water outlet, 22-second cooling water inlet, 23-second cooling water outlet;
3-evaporator, 31-cold water inlet, 32-cold water outlet;
4-absorber, 41-first cooling water inlet, 42-first cooling water outlet;
51-a first line, 52-a second line;
61-first regulating valve, 62-second regulating valve;
7-a temperature controller;
8-a heat exchange section;
91-dilute solution line, 92-concentrated solution line;
10-pumping means.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the present application is further described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the application provides an absorption unit and a waste heat recovery system, wherein the waste heat recovery system comprises the absorption unit and external equipment, specifically, as shown in fig. 1, the absorption unit comprises a generator 1, a condenser 2, an evaporator 3 and an absorber 4.
The external equipment comprises a driving heat source, a cooling water device and a cooling water device.
The generator 1 comprises a heat source inlet 11 and a heat source outlet 12, a driving heat source is communicated with the heat source inlet 11 and used for providing the heat source for the generator 1, dilute solution (such as lithium bromide dilute solution) in the generator 1 absorbs heat of the driving heat source and evaporates to form refrigerant steam and concentrated solution, the refrigerant steam is introduced into the condenser 2, and the concentrated solution is introduced into the absorber 4 through a concentrated solution pipeline 92.
The cooling water device is communicated with the second cooling water inlet 22 of the condenser 2 and is used for introducing cooling water into the condenser 2, the refrigerant steam introduced from the generator 1 exchanges heat with the cooling water and then is condensed to form liquid refrigerant water, the temperature of the cooling water discharged from the second cooling water outlet 23 is increased, and the liquid refrigerant water can be introduced into the evaporator 3 along the first pipeline 51 and can also be introduced into the absorber 4 along the second pipeline 52.
The evaporator 3 includes a cold water inlet 31 and a cold water outlet 32, a cold water device is communicated with the cold water inlet 31 for providing cold water into the evaporator 3, the refrigerant water introduced into the evaporator 3 along the first pipeline 51 absorbs heat of the cold water through evaporation to form refrigerant vapor again, so that the temperature of the cold water discharged from the cold water outlet 32 is lowered, and the refrigerant vapor is introduced into the absorber 4.
The cooling water device is also communicated with a first cooling water inlet 41 of the absorber 4 and is used for introducing cooling water into the absorber 4, the refrigerant steam introduced from the evaporator 3 is absorbed by the concentrated solution to release heat (the temperature of the cooling water discharged from the first cooling water outlet 42 is increased), the concentrated solution introduced from the generator 1 into the absorber 4 absorbs the refrigerant steam of the evaporator 3 and is mixed with the refrigerant water introduced into the absorber 4 along a second pipeline 52 to obtain a dilute solution, and the dilute solution is introduced into the generator 1 to absorb the heat of the driving heat source again.
The driving heat source heats the refrigerant solution in the generator 1 under the condition of heat exchange of the refrigerant solution in the circulation loop in the absorption unit, the concentration of the refrigerant solution is increased while the refrigerant steam is generated, the high-concentration refrigerant solution is introduced into the absorber 4 for dilution, then the high-concentration refrigerant solution is introduced into the generator 1 along the dilute solution pipeline 91 again, the heat exchange is carried out again with the driving heat source, and the heat of the driving heat source is continuously consumed.
The refrigerant water produced by the condenser 2 is discharged from the refrigerant water outlet 21, and then can be respectively introduced into the evaporator 3 and the absorber 4 through two pipelines, when the absorption type unit is in full load operation, the refrigerant water can be introduced into the evaporator 3 only through the first pipeline 51, the heat of the driving heat source can be completely consumed, when the absorption type unit is in operation below the full load, the temperature difference between the cold water outlet 32 and the cold water inlet 31 in the evaporator 3 is reduced (the refrigeration effect is reduced), at the moment, part of the refrigerant water is directly introduced into the absorber 4 through the second pipeline 52, that is, the refrigerant water introduced into the evaporator 3 through the first pipeline 51 can absorb the temperature of cold water to evaporate and participate in refrigeration, and the refrigerant water directly introduced into the absorber 4 through the second pipeline 52 does not participate in refrigeration but directly participate in heat exchange. By the arrangement, the heat of the driving heat source can be completely consumed under any load condition of the absorption unit.
When the purpose of consuming the driving heat source is partially taken, the absorption unit provided by the embodiment can completely consume the heat of the driving heat source, and does not need to be additionally provided with external cooling equipment, so that the overall structure of the waste heat recovery system can be simplified, the field arrangement condition is simplified, and the cost is reduced.
Or, in this embodiment, the second pipeline 52 may also be communicated with the generator 1, and the refrigerant water is directly introduced into the generator 1, and is mixed with the dilute solution in the generator 1, and then is heated and evaporated by the driving heat source, or the second pipeline 52 may also be communicated with the dilute solution pipeline 91, that is, in this embodiment, the second pipeline 52 may be directly introduced into the absorber 4 to be mixed with the refrigerant solution, and the diluted dilute solution is introduced into the generator 1 through the dilute solution pipeline 91; the second pipeline 52 can also be directly introduced into the generator 1, mixed with the dilute solution introduced into the generator 1 through the dilute solution pipeline 91 and exchanges heat with the driving heat source; the second line 52 may be connected to the dilute solution line 91 and may be introduced into the generator 1 together with the dilute solution.
When the second pipeline 52 is directly communicated with the absorber 4, the whole structure can be simplified, and the temperature of the dilute solution can be reduced, so that the heat exchange with the concentrated solution can be conveniently carried out when the dilute solution passes through the heat exchange part 8, and the temperature of the concentrated solution introduced into the absorber 4 can be reduced.
The first pipeline 51 and the second pipeline 52 are respectively provided with a regulating valve, specifically, as shown in fig. 1, the first pipeline 51 is provided with a first regulating valve 61, the second pipeline 52 is provided with a second regulating valve 62, and the flow rates of the refrigerant water in the first pipeline 51 and the second pipeline 52 are respectively regulated through the two regulating valves, so that the amount of the refrigerant water introduced into the evaporator 3 and the absorber 4 can be conveniently regulated under different load states, and the heat of the driving heat source can be completely consumed while the refrigeration condition is met.
In detail, when the absorption unit is in a full load state, the first regulating valve 61 can be fully opened, the second regulating valve 62 is fully closed, the refrigerant water flowing out from the condenser 2 can be completely introduced into the evaporator 3 along the first pipeline 51, when the absorption unit is lower than the full load state, the first regulating valve 61 and the second regulating valve 62 are both in an open state, when the absorption unit does not need refrigeration, the first regulating valve 61 is fully closed, the second regulating valve 62 is fully opened, at this time, the refrigerant water can be completely flowed into the second pipeline 52, and the absorption unit is equivalent to a heat exchange device at this time.
The flow of the refrigerant water of the two parallel pipelines is respectively adjusted through the two adjusting valves, and the flexibility is good.
Alternatively, the flow rates of the refrigerant water in the first pipeline 51 and the second pipeline 52 may be adjusted by providing a three-way adjusting valve, which is not limited herein.
As shown in fig. 1, in this embodiment, the absorption unit further includes a temperature controller 7, and the temperature controller 7 is capable of monitoring a temperature difference between the cold water inlet 31 and the cold water outlet 32 of the evaporator 3, determining a current load condition of the absorption unit according to the temperature difference, and then adjusting the opening degree of each adjusting valve according to the load condition, thereby adjusting the flow rate of the refrigerant in the first pipeline 51 and the second pipeline 52.
Specifically, how the temperature controller 7 monitors the temperature difference and adjusts the opening of each regulating valve according to the temperature difference is well known in the prior art for those skilled in the art, and is not described herein for brevity.
A concentrated solution pipeline 92 and a dilute solution pipeline 91 are communicated between the absorber 4 and the generator 1, wherein the dilute solution in the absorber 4 can be introduced into the generator 1 along the dilute solution pipeline 91, and the concentrated solution in the generator 1 can be introduced into the absorber 4 along the concentrated solution pipeline 92. As shown in fig. 1, the absorption unit further includes a heat exchange portion 8, the heat exchange portion 8 includes a cooling pipeline and a heat supply pipeline, wherein the cooling pipeline is communicated with the dilute solution pipeline 91, the heat supply pipeline is communicated with the concentrated solution pipeline 92, that is, the concentrated solution with higher temperature can exchange heat with the dilute solution with lower temperature, so that the temperature of the concentrated solution is reduced, and then the concentrated solution is introduced into the absorber 4, and the temperature of the dilute solution is increased and then introduced into the generator 1.
The condenser 2 and the absorber 4 are respectively provided with a cooling water inlet, as shown in fig. 1, the absorber 4 is provided with a first cooling water inlet 41 and a first cooling water outlet 42, the condenser 2 is provided with a second cooling water inlet 22 and a second cooling water outlet 23, and the cooling water device is respectively communicated with the first cooling water inlet 41 and the second cooling water inlet 22 and is used for introducing cooling water into the absorber 4 and the condenser 2.
Specifically, the first cooling water inlet 41 and the second cooling water inlet 22 may be arranged in series or in parallel, and are not particularly limited herein.
When two cooling water inlets are arranged in series, the cooling water device is communicated with the first cooling water inlet 41 through a pipeline, the first cooling water outlet 42 is communicated with the second cooling water inlet 22, and the temperature of the cooling water discharged from the second cooling water outlet 23 is increased and can be directly discharged to the outside for use.
When the two cooling water inlets are arranged in parallel, the cooling water device is respectively communicated with the first cooling water inlet 41 and the second cooling water inlet 22 through pipelines, and the temperature of the cooling water discharged from the first cooling water outlet 42 and the second cooling water outlet 23 is increased and can be directly discharged to the outside for use.
In this embodiment, the absorption type unit may be a single-effect machine or a double-effect machine, the evaporator 3 may also be a two-stage evaporator 3, the absorber 4 may also be a two-stage receiver, and the generator 1 may also be a multi-stage generator 1, and is not limited by the unit type.
The driving heat source is steam, hot water, heat transfer oil, flue gas, natural gas, artificial gas, light oil, heavy oil, etc., and is not particularly limited herein.
As shown in fig. 1, a pumping device 10 is further provided in a part of the pipeline in the absorption unit for providing power for the liquid circulation in the pipeline. Specifically, the number and the arrangement position of the pumping devices 10 are not particularly limited, and may be set according to the specific situation of each pipeline.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. An absorption type unit is characterized by comprising a generator (1), a condenser (2), an evaporator (3) and an absorber (4);
the refrigerant water outlet (21) of the condenser (2) is communicated with the evaporator (3) through a first pipeline (51), and the refrigerant water outlet (21) of the condenser (2) is also communicated with the dilute solution of the absorber (4) through a second pipeline (52) into the generator (1).
2. Absorption unit according to claim 1, wherein the refrigerant water outlet (21) of the condenser (2) communicates with the absorber (4) via a second line (52).
3. Absorption unit according to claim 1, wherein the first (51) and the second (52) line are each provided with a regulating valve for regulating the flow.
4. An absorption unit according to claim 3, further comprising a temperature controller (7) for adjusting the opening of each of the regulating valves according to the temperature difference between the cold water inlet (31) and the cold water outlet (32) of the evaporator (3).
5. The absorption unit according to any one of claims 1 to 4, further comprising a heat exchange portion (8), wherein a rich solution pipeline (92) and a dilute solution pipeline (91) are communicated between the absorber (4) and the generator (1), the dilute solution in the absorber (4) can be introduced into the generator (1) along the dilute solution pipeline (91), and the rich solution in the generator (1) can be introduced into the absorber (4) along the rich solution pipeline (92);
and a cooling pipeline of the heat exchange part (8) is communicated with the dilute solution pipeline (91), and a heat supply pipeline of the heat exchange part (8) is communicated with the concentrated solution pipeline (92).
6. Absorption unit according to any of claims 1-4, wherein the absorber (4) and the condenser (2) are provided with a cooling water inlet, respectively, and the cooling water inlet of the condenser (2) and the cooling water inlet of the absorber (4) are connected in series or in parallel.
7. Absorption unit according to any of claims 1-4, wherein the evaporator (3) is a two-stage evaporator (3);
and/or the absorber (4) is a two-stage absorber (4);
and/or the generator (1) is a multi-stage generator (1).
8. A waste heat recovery system comprising an absorption unit according to any one of claims 1 to 7, a driving heat source communicating with the heat source inlet (11) of the generator (1) for supplying heat to the generator (1) to heat and concentrate the dilute solution in the generator (1) to form a concentrated solution.
9. The waste heat recovery system of claim 8, wherein the driving heat source is steam, hot water, conduction oil, flue gas, natural gas, artificial gas, light oil, or heavy oil.
10. The waste heat recovery system according to claim 8, further comprising a cold water device, wherein the cold water device is communicated with the cold water inlet (31) of the evaporator (3) and is used for introducing cold water into the cold water inlet (31), and the cold water is mixed with an antifreeze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220403535.3U CN216744978U (en) | 2022-02-25 | 2022-02-25 | Absorption type unit and waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220403535.3U CN216744978U (en) | 2022-02-25 | 2022-02-25 | Absorption type unit and waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216744978U true CN216744978U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220403535.3U Active CN216744978U (en) | 2022-02-25 | 2022-02-25 | Absorption type unit and waste heat recovery system |
Country Status (1)
| Country | Link |
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| CN (1) | CN216744978U (en) |
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- 2022-02-25 CN CN202220403535.3U patent/CN216744978U/en active Active
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