CN220366723U - Desulfurizing slurry heat recovery system - Google Patents
Desulfurizing slurry heat recovery system Download PDFInfo
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- CN220366723U CN220366723U CN202320322528.5U CN202320322528U CN220366723U CN 220366723 U CN220366723 U CN 220366723U CN 202320322528 U CN202320322528 U CN 202320322528U CN 220366723 U CN220366723 U CN 220366723U
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- desulfurizing tower
- pipe
- pipeline
- controller
- heat pump
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- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 39
- 239000002002 slurry Substances 0.000 title claims abstract description 35
- 238000011084 recovery Methods 0.000 title claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 27
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 27
- 230000023556 desulfurization Effects 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000010438 heat treatment Methods 0.000 claims description 25
- 239000006096 absorbing agent Substances 0.000 claims description 19
- 239000000110 cooling liquid Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 10
- 239000003546 flue gas Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
Embodiments of the present disclosure provide a desulfurization slurry heat recovery system, the system comprising: absorption heat pump, desulfurizing tower and booster pump; the booster pump suction pipe is connected with the desulfurizing tower, and the booster pump discharge pipe is connected with the absorption heat pump; the absorption heat pump is connected with the desulfurizing tower through a slurry pipeline. The technical scheme that this application provided is used for solving heat exchanger and condenser and needs frequent change or the problem of maintenance.
Description
Technical Field
This document relates to boiler water conservation technology field, especially relates to a desulfurization thick liquid heat recovery system.
Background
The heat loss of the exhaust smoke of the coal-fired power plant boiler in operation accounts for a large proportion, and the operation exhaust smoke temperature of some thermal power plants is often higher than a design value. Therefore, the reduction of the exhaust gas temperature of the power station boiler has important practical significance for energy conservation and emission reduction.
In the prior art, a flue gas condenser is arranged at a desulfurization outlet of a part of power plants to condense water vapor in wet saturated flue gas for recycling.
However, due to the high loading of the flue, the above solution is highly corrosive to the condensing heat exchanger, resulting in frequent replacement or repair of the heat exchanger and condenser, and thus high costs.
Disclosure of Invention
In view of the above analysis, the present application aims to provide a desulfurization slurry heat recovery system for recovering desulfurization slurry heat, reducing the exhaust gas temperature and the water vapor discharge amount of a desulfurization tower, and finally achieving the purposes of energy saving, emission reduction and cost saving at the same time.
One or more embodiments of the present specification provide a desulfurization slurry heat recovery system comprising: absorption heat pump, desulfurizing tower and booster pump;
the booster pump suction pipe is connected with the desulfurizing tower, and the booster pump discharge pipe is connected with the absorption heat pump;
the absorption heat pump is connected with the desulfurizing tower through a slurry pipeline.
Further, the absorption heat pump includes: an evaporator;
the evaporator is connected with the booster pump and is connected with the desulfurizing tower through the slurry pipeline.
Further, a heating pipe is arranged in the heating chamber of the evaporator;
the liquid inlet of the heating pipe is connected with the booster pump discharge pipe;
and the liquid outlet of the heating pipe is connected with the desulfurizing tower through the slurry pipeline.
Further, the system further comprises: a slurry circulation pump;
a spraying layer is arranged at the upper part of the desulfurizing tower;
the spraying layer is connected with the bottom of the desulfurizing tower through the slurry circulating pump.
Further, the system further comprises: a piping system;
and the pipeline system is respectively connected with the cooling liquid inlet of the absorption heat pump and the heat supply pipe network.
Further, the absorption heat pump includes: an absorber;
the absorber is provided with a cooling pipe;
the cooling pipe is provided with the cooling liquid inlet.
Further, the piping system includes: a water inlet pipe;
one end of the water inlet pipeline is connected with the cooling liquid inlet, and the other end of the water inlet pipeline is connected with the heat supply pipe network.
Further, the absorption heat pump includes: an evaporator;
the evaporation chamber of the evaporator is connected with the steam inlet of the absorber.
Further, the absorption heat pump includes: a condenser;
the absorber is provided with a cooling liquid outlet;
the cooling liquid outlet is connected with a condensate inlet of the condenser.
Further, the piping system includes: a water outlet pipe;
one end of the water outlet pipeline is connected with a condensate outlet of the condenser, and the other end of the water outlet pipeline is connected with a heat supply pipe network.
Compared with the prior art, the application can at least realize the following technical effects:
the application is through the absorption heat pump of the desulfurization liquid push in the booster pump with the desulfurizing tower. And then, the pressed desulfurization liquid exchanges heat in the absorption heat pump to complete the recovery of the heat of the desulfurization liquid. Finally, the cooled desulfurization liquid enters the desulfurization tower from the absorption heat pump through the slurry pipeline so as to reduce the temperature of the desulfurization tower, thereby reducing the water vapor entering the atmosphere in the desulfurization tower.
Drawings
For a clearer description of one or more embodiments of the present description or of the solutions of the prior art, the drawings that are necessary for the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description that follow are only some of the embodiments described in the description, from which, for a person skilled in the art, other drawings can be obtained without inventive faculty.
Fig. 1 is a schematic structural diagram of an absorption heat pump according to one or more embodiments of the present disclosure;
FIG. 2 is a schematic diagram of a system for heat recovery of a desulfurization slurry according to one or more embodiments of the present disclosure.
Reference numerals: 1-absorption heat pump, 11-generator, 12-solution heat exchanger, 13-absorber, 14-solution pump, 15-working medium pump, 16-evaporator, 17-first throttle valve, 18-condenser, 19-second throttle valve. 2-pipeline system, 21-power plant heating pipe network water supply pipeline, 22-heat pump water outlet pipeline, 23-heating pipe network bypass pipeline, 24-heat pump water inlet pipeline, 25-power plant heating pipe network water return pipeline. 3-desulfurizing tower, 31-desulfurizing tower outlet, 32-spraying layer, 33-desulfurizing tower inlet, 34-slurry pipeline and 35-slurry circulating pump. 4-booster pump, 5-condensate tank, 51-condensate water pipeline.
Detailed Description
In order to enable a person skilled in the art to better understand the technical solutions in one or more embodiments of the present specification, the technical solutions in one or more embodiments of the present specification will be clearly and completely described below with reference to the drawings in one or more embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one or more embodiments of the present disclosure without inventive faculty, are intended to be within the scope of the present disclosure.
The steam in the flue gas of the desulfurizing tower is directly discharged into the atmosphere, so that serious moisture loss is caused for the power plant, and particularly for the power plant in the area of water resource shortage, the water resource is extremely valuable, and the water resource is a key factor for restricting the normal and stable operation of the power plant. In addition, the direct release of water vapor into the atmosphere also carries away a significant amount of heat, resulting in a significant amount of wasted heat.
Embodiments of the present application provide a desulfurization slurry heat recovery system, as shown in fig. 1 and 2, including: an absorption heat pump 1, a pipeline system 2, a desulfurizing tower 3, a booster pump 4 and a condensate tank 5.
Wherein the absorption heat pump 1 is provided with a generator 11, an absorber 13, an evaporator 16 and a condenser 18. A solution heat exchanger 12 is arranged between the generator 11 and the absorber 13, the generator 11 is connected with the solution heat exchanger 12 through a pipeline, the solution heat exchanger 12 is connected with the absorber 13 through a pipeline, the absorber 13 is connected with the evaporator 16 through a pipeline, the evaporator 16 is connected with the condenser 18 through a pipeline, a first throttle valve 17 is arranged on a pipe section between the evaporator 16 and the condenser 18, and the absorber 13 is connected with the condenser 18 through a pipeline. The exchanger 12 is connected to the absorber 13 by two pipes. The solution pump 14 is placed on one pipe between the solution heat exchanger 12 and the absorber 13, and the second throttle valve 19 is placed on the other pipe between the solution heat exchanger 12 and the absorber 13; the generator 11 is provided with a plant auxiliary steam pipe for introducing auxiliary steam. The condensed water tank 5 is connected with the generator through a condensed water pipeline 51, and the upper end and the lower end of the evaporator 16 are connected through a working medium pump 15.
The piping system 2 includes: a water inlet pipe, a water outlet pipe and a heat supply pipe network bypass pipe 23;
wherein, the inlet channel includes: a power plant heating pipe network return water pipe 25 and a heat pump water inlet pipe 24. The water outlet pipeline comprises: a water supply pipeline 21 of a power plant heating pipe network and a heat pump water outlet pipeline 22. A heating network bypass pipe 23 is installed between the heat pump water outlet pipe 22 and the heat pump water inlet pipe 24. Wherein, power plant's heating network return water pipe 25 connects power plant's heating network, and heat pump inlet 24 connects the cooling liquid entry. The water supply pipeline 21 of the power plant heating network is connected with a heating network, and the hot pump outlet pipeline 22 is connected with a condensate outlet of the condenser 18.
The desulfurizing tower 3 includes: a desulfurizing tower outlet 31, a spray layer 32, a desulfurizing tower inlet 33, a slurry pipe 34 and a slurry circulating pump 35. Wherein the flue gas enters the desulfurizing tower 3 from the desulfurizing tower inlet 33 and leaves the desulfurizing tower 3 from the desulfurizing tower outlet 31. The spray layer 32 sprays liquid to scrub the sulfur-containing gases in the flue gas. The slurry circulation pump 35 is used to deliver the liquid at the bottom of the column to the spray level 32.
In one embodiment of the present application, in operation, booster pump 4 forces a portion of the desulfurization slurry of the desulfurization tower into the heating tube of evaporator 16 through the suction tube and the discharge tube. A heating pipe is provided in the heating chamber of the evaporator 16, i.e., the liquid in the heating chamber of the evaporator 16 is heated by the heat carried by the desulfurization slurry to recover the heat of the desulfurization slurry. Thereafter, the desulfurization slurry is refluxed into the desulfurization tower 3 through the slurry pipe 34 to lower the temperature in the desulfurization tower 3. Since the temperature in the desulfurizing tower 3 is lowered, the temperature of the flue gas in the desulfurizing tower 3 is lowered. The flue gas is typically saturated wet flue gas, and as the temperature of the flue gas decreases, part of the water vapor in the flue gas condenses into water, eventually reducing the water vapor exhausted from the desulfurizing tower 3. Since the desulfurizing tower 3 needs to be continuously replenished with the desulfurizing slurry, the temperature in the desulfurizing tower 3 does not always decrease. With the continuous circulation of the above process, the temperature in the desulfurizing tower 3 reaches an equilibrium value. For example, in the prior art, the temperature in the desulfurizing tower 3 (i.e., the exhaust gas temperature) is about 50 ℃, and after the technical scheme of the present application is adopted, the temperature in the desulfurizing tower 3 is reduced to about 45 ℃. Accordingly, for a 300MW boiler unit, the water vapor emission can be reduced by 5-30t/h. The desulfurization slurry cooled in the evaporator was about 25 ℃. Therefore, the technical scheme provided by the application can recycle the heat of the desulfurization slurry, reduce the exhaust gas temperature and reduce the water vapor discharge amount of the desulfurization tower.
Preferably, in order to control and enhance the cooling effect, a plurality of spray layers 32 are arranged in the desulfurizing tower and the same number of slurry circulating pumps 35 are matched, so that the sufficient contact between the gas phase and the liquid phase can be ensured, and the gas phase temperature can be further reduced.
In one embodiment of the present application, in operation, some water is extracted from the power plant heating network as cooling liquid through the power plant heating network return conduit 25. The extracted water passes through the heat pump water intake conduit 24 and the cooling liquid inlet enters the cooling pipes of the absorber 13. The absorption process in the absorber 13 generates heat which is absorbed by the cooling liquid. The cooling liquid then flows through the cooling liquid outlet and the condensate inlet of the condenser 18 into the condenser tube, again absorbing heat. Finally, the heat generated by the heat pump in the working process is used for heating by entering the heat supply pipe network through the water supply pipe 21 of the power plant heat supply pipe network and the heat pump water outlet pipe 22.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing description is by way of example only and is not intended to limit the present disclosure. Various modifications and changes may occur to those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principles of the present document are intended to be included within the scope of the claims of the present document.
Claims (9)
1. A desulfurization slurry heat recovery system, comprising: absorption heat pump, desulfurizing tower and booster pump;
the booster pump suction pipe is connected with the desulfurizing tower, and the booster pump discharge pipe is connected with the absorption heat pump;
the absorption heat pump is connected with the desulfurizing tower through a slurry pipeline;
the system further comprises: a slurry circulation pump;
a spraying layer is arranged at the upper part of the desulfurizing tower;
the spraying layer is connected with the bottom of the desulfurizing tower through the slurry circulating pump.
2. The system of claim 1, wherein the system further comprises a controller configured to control the controller,
the absorption heat pump includes: an evaporator;
the evaporator is connected with the booster pump and is connected with the desulfurizing tower through the slurry pipeline.
3. The system of claim 2, wherein the system further comprises a controller configured to control the controller,
a heating pipe is arranged in the heating chamber of the evaporator;
the liquid inlet of the heating pipe is connected with the booster pump discharge pipe;
and the liquid outlet of the heating pipe is connected with the desulfurizing tower through the slurry pipeline.
4. The system of claim 1, wherein the system further comprises a controller configured to control the controller,
the system further comprises: a piping system;
and the pipeline system is respectively connected with the cooling liquid inlet of the absorption heat pump and the heat supply pipe network.
5. The system of claim 4, wherein the system further comprises a controller configured to control the controller,
the absorption heat pump includes: an absorber;
the absorber is provided with a cooling pipe;
the cooling pipe is provided with the cooling liquid inlet.
6. The system of claim 5, wherein the system further comprises a controller configured to control the controller,
the piping system includes: a water inlet pipe;
one end of the water inlet pipeline is connected with the cooling liquid inlet, and the other end of the water inlet pipeline is connected with the heat supply pipe network.
7. The system of claim 5, wherein the system further comprises a controller configured to control the controller,
the absorption heat pump includes: an evaporator;
the evaporation chamber of the evaporator is connected with the steam inlet of the absorber.
8. The system of claim 5, wherein the system further comprises a controller configured to control the controller,
the absorption heat pump includes: a condenser;
the absorber is provided with a cooling liquid outlet;
the cooling liquid outlet is connected with a condensate inlet of the condenser.
9. The system of claim 8, wherein the system further comprises a controller configured to control the controller,
the piping system includes: a water outlet pipe;
one end of the water outlet pipeline is connected with a condensate outlet of the condenser, and the other end of the water outlet pipeline is connected with a heat supply pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320322528.5U CN220366723U (en) | 2023-02-16 | 2023-02-16 | Desulfurizing slurry heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320322528.5U CN220366723U (en) | 2023-02-16 | 2023-02-16 | Desulfurizing slurry heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220366723U true CN220366723U (en) | 2024-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320322528.5U Active CN220366723U (en) | 2023-02-16 | 2023-02-16 | Desulfurizing slurry heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220366723U (en) |
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2023
- 2023-02-16 CN CN202320322528.5U patent/CN220366723U/en active Active
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