CN114014402A - Vertical-layout desulfurization slurry flash evaporation heat extraction system and working method thereof - Google Patents
Vertical-layout desulfurization slurry flash evaporation heat extraction system and working method thereof Download PDFInfo
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- CN114014402A CN114014402A CN202111447069.5A CN202111447069A CN114014402A CN 114014402 A CN114014402 A CN 114014402A CN 202111447069 A CN202111447069 A CN 202111447069A CN 114014402 A CN114014402 A CN 114014402A
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- spray tower
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- 239000002002 slurry Substances 0.000 title claims abstract description 67
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 46
- 230000023556 desulfurization Effects 0.000 title claims abstract description 46
- 238000001704 evaporation Methods 0.000 title claims abstract description 32
- 230000008020 evaporation Effects 0.000 title claims abstract description 32
- 238000000605 extraction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 50
- 239000000498 cooling water Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000007701 flash-distillation Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000009834 vaporization Methods 0.000 claims 1
- 230000008016 vaporization Effects 0.000 claims 1
- 230000008676 import Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 30
- 239000004744 fabric Substances 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a desulfurization slurry flash evaporation heat extraction system in vertical layout and a working method thereof, wherein the desulfurization slurry flash evaporation heat extraction system comprises a flash evaporation tower and a spray tower; a desulfurization slurry inlet is formed in the flash tower, a cold slurry outlet is formed in the bottom of the flash tower, and a connecting pipe is communicated with the top of the flash tower; the spray tower sets up directly over the flash column, and during the spray tower was stretched into at the connecting pipe top, be provided with the plate washer directly over the connecting pipe top, the spray tower was located the top at connecting pipe top and is provided with the cooling water import, and the spray tower bottom is provided with the cooling water export, and the spray tower in-connection has the vacuum pump. The floor area of the flash evaporation heat extraction system can be effectively reduced.
Description
Technical Field
The invention belongs to the field of flash evaporation, and relates to a vertical desulfurization slurry flash evaporation heat extraction system and a working method thereof.
Background
The desulfurization slurry flash evaporation heat extraction technology is a novel flue gas waste heat recovery technology. The technology utilizes the characteristic that the boiling point of the slurry in the wet flue gas desulfurization process is reduced along with the reduction of the environmental pressure to establish a vacuum phase change environment, so that the desulfurization slurry above the current negative pressure saturation temperature is subjected to flash evaporation, negative pressure steam is generated and is conveyed to an absorption heat pump to carry out condensation and heat release on a low-temperature medium, and clean, efficient and low-cost recovery of the waste heat of the desulfurization slurry is realized. The technology can realize multiple purposes of saving energy and water, improving the desulfurization efficiency and eliminating visual pollution of smoke plume, and can simultaneously take energy conservation and emission reduction into consideration.
Because the space of a power plant is limited, the existing flash evaporation heat extraction system has larger occupied area and low space utilization rate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a desulfurization slurry flash evaporation heat-extraction system in a vertical layout and a working method thereof, which can effectively reduce the floor area of the flash evaporation heat-extraction system.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a vertically-arranged desulfurization slurry flash evaporation heat-extraction system comprises a flash evaporation tower and a spray tower;
a desulfurization slurry inlet is formed in the flash tower, a cold slurry outlet is formed in the bottom of the flash tower, and a connecting pipe is communicated with the top of the flash tower;
the spray tower sets up directly over the flash column, and during the spray tower was stretched into at the connecting pipe top, be provided with the plate washer directly over the connecting pipe top, the spray tower was located the top at connecting pipe top and is provided with the cooling water import, and the spray tower bottom is provided with the cooling water export, and the spray tower in-connection has the vacuum pump.
Preferably, the baffle plate at the top of the connecting pipe adopts a hood.
Preferably, the spray tower is provided with a vacuum pipeline, the front end of the vacuum pipeline is communicated with the interior of the spray tower, the vacuum pump is arranged in the vacuum pipeline, and a partition plate is arranged in front of and above the front end of the vacuum pipeline.
Preferably, be provided with the defroster in the flash column, the defroster is located the top of desulfurization thick liquid import.
Preferably, the desulfurization slurry inlet is connected with cloth thick liquid tube bank, and cloth thick liquid tube bank is located the flash column, and cloth thick liquid tube bank level sets up, and it has a plurality of thick liquid exports to follow its axial direction equipartition on the cloth thick liquid tube bank, and the thick liquid export sets up towards the flash column bottom.
Further, one slurry nozzle is connected to each slurry outlet.
Preferably, the cooling water inlet is connected with a water distribution pipe bundle, the water distribution pipe bundle is positioned in the spray tower and horizontally arranged, a plurality of water outlets are uniformly distributed on the water distribution pipe bundle along the axial direction of the water distribution pipe bundle, and the water outlets are arranged towards the bottom of the spray tower.
Further, each water outlet is connected with a cooling water nozzle.
Preferably, the desulfurization slurry inlet and the cooling water inlet are both connected with a pump.
A working method of a desulfurization slurry flash evaporation heat-extraction system based on any one of the vertical layouts comprises the following steps:
the desulfurization slurry enters the flash tower through a desulfurization slurry inlet, the vacuum pump extracts the interior of the flash tower and the interior of the spray tower into a negative pressure environment, the desulfurization slurry is subjected to flash evaporation, and the water vapor obtained by flash evaporation enters the spray tower through a connecting pipe; cooling water enters the spray tower through the cooling water inlet, and the water vapor flashed out is cooled and condensed, mixed with the water vapor and then flows out from the cooling water outlet.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the connecting pipe is arranged through the hole at the upper part of the flash tower, the connecting pipe extends into the spray tower, and the baffle plate is arranged at the top of the connecting pipe, so that cooling water is prevented from entering the flash tower, and therefore, water vapor is heated in the spray tower, the flash tower and the spray tower are vertically arranged, and the floor area of a flash evaporation heating system can be effectively reduced.
Further, set up the hood on the connecting pipe, prevent that spray water from getting into the flash column, and can play the effect of reposition of redundant personnel equipartition to flash steam, improve the heat exchange efficiency of steam and cooling water, fully retrieve flash steam waste heat.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein: 1-a flash column; 2-a demister; 3-cooling water inlet pump; 4-laying a slurry tube bundle; 5-slurry nozzle; 6-slurry pump; 7-distributing water pipe bundles; 8-a vacuum pump; 9-cooling water outlet pump; 10-a spray tower; 11-a separator; 12-a cold slurry pump; 13-a connecting tube; 14-blast cap.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the desulfurization slurry flash evaporation heat-extraction system with vertical layout according to the present invention comprises a flash evaporation tower 1 and a spray tower 10.
Flash column 1 is circular structure, includes defroster 2, desulfurization thick liquid import, cold thick liquid export and connecting pipe 13 in the flash column 1.
Desulfurization slurry import sets up at 1 middle zone in flash column, desulfurization slurry access connection has cloth thick liquid tube bundle 4, cloth thick liquid tube bundle 4 is located flash column 1, cloth thick liquid tube bundle 4 advance the thick liquid mouth with coal-fired unit wet flue gas desulfurization tower's desulfurization thick liquid exit linkage, stretch into in the flash column, cloth thick liquid tube bundle 4 level sets up, cloth thick liquid tube bundle 4 is gone up and is had a plurality of thick liquid exports along its axial direction equipartition, the thick liquid export sets up towards 1 bottom in the flash column, every thick liquid exit linkage has a thick liquid nozzle 5, thick liquid pump 6 is located cloth thick liquid tube bundle 4 advances the thick liquid mouth, be arranged in extracting thick liquid to flash column 1 in the follow desulfurizing column.
The cold slurry outlet is positioned at the bottom of the flash tower 1, the cold slurry outlet is connected with a cold slurry outlet pipeline, and a cold slurry pump 12 is arranged in the cold slurry outlet pipeline.
The top of the flash tower 1 is communicated with the bottom of the connecting pipe 13.
The spray tower 10 is arranged right above the flash tower 1, and the spray tower 10 comprises a cooling water inlet, a cooling water outlet and a vacuum pump 8.
The top of the connecting pipe 13 extends into the spray tower 10, a baffle is arranged right above the top of the connecting pipe 13, and the baffle adopts a hood 14 to prevent spray water from entering the flash tower 1.
The cooling water inlet is positioned at the top of the spray tower 10 and above the top of the connecting pipe 13, the cooling water inlet is connected with a water distribution pipe bundle 7, the water distribution pipe bundle 7 is positioned in the spray tower 10, the water distribution pipe bundle 7 is horizontally arranged, a plurality of water outlets are uniformly distributed on the water distribution pipe bundle 7 along the axial direction of the water distribution pipe bundle, the water outlets are arranged towards the bottom of the spray tower 10, and each water outlet is connected with a cooling water nozzle; the tail end of the water distribution pipe bundle 7 is provided with a cooling water inlet pump 3.
A vacuum pipeline is arranged on the spray tower 10, the front end of the vacuum pipeline is communicated with the interior of the spray tower 10, a vacuum pump 8 is arranged in the vacuum pipeline, and the vacuum pump 8 is used for vacuumizing the flash tower 1; a partition plate 11 is arranged in front of and above the front end of the vacuum pipeline to prevent liquid drops from entering the vacuum pump.
The working process of the desulfurization slurry flash evaporation heat-extraction system vertically arranged comprises the following steps:
desulfurization slurry from the desulfurizing tower gets into cloth thick liquid tube bank 4, steps up the back through thick liquid pump 6, sprays through thick liquid nozzle 5 and breaks into the dribble, because the inner chamber of flash column 1 is negative pressure environment, the liquid drop of desulfurization slurry takes place the flash distillation, and the flash distillation goes out vapor, and vapor gets into connecting pipe 13 behind the defogging of defroster 2, then gets into in the spray column 10. The cooled cold slurry is collected at the bottom of the flash tower 1, and then is pressurized by the cold slurry pump 12 and then returns to the desulfurization tower.
Cooling water enters the water distribution pipe bundle 7, is subjected to pressure boosting through the cooling water inlet pump 3, is sprayed and crushed into small liquid drops through the cooling water nozzle 10, is cooled and condensed by water vapor flashed out, is mixed with the water vapor, is gathered at the lower part of the spray tower 10, and is subjected to pressure boosting through the cooling water outlet pump 9 and then returns.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A vertically-arranged desulfurization slurry flash evaporation heat-extraction system is characterized by comprising a flash evaporation tower (1) and a spray tower (10);
a desulfurization slurry inlet is arranged on the flash tower (1), a cold slurry outlet is arranged at the bottom of the flash tower (1), and the top of the flash tower (1) is communicated with a connecting pipe (13);
the spray tower (10) is arranged right above the flash tower (1), the top of the connecting pipe (13) stretches into the spray tower (10), a baffle plate is arranged right above the top of the connecting pipe (13), a cooling water inlet is arranged above the spray tower (10) which is positioned at the top of the connecting pipe (13), a cooling water outlet is arranged at the bottom of the spray tower (10), and a vacuum pump (8) is connected in the spray tower (10).
2. The vertically arranged desulfurization slurry flash evaporation heat-extraction system according to claim 1, characterized in that the baffle plate at the top of the connecting pipe (13) adopts a hood (14).
3. The vertically-arranged desulfurization slurry flash evaporation and heat extraction system according to claim 1, characterized in that a vacuum pipeline is arranged on the spray tower (10), the front end of the vacuum pipeline is communicated with the interior of the spray tower (10), the vacuum pump (8) is arranged in the vacuum pipeline, and a partition (11) is arranged in front of and above the front end of the vacuum pipeline.
4. The vertically-arranged desulfurization slurry flash evaporation heat-extraction system is characterized in that a demister (2) is arranged in the flash tower (1), and the demister (2) is positioned above the inlet of the desulfurization slurry.
5. The vertically-arranged desulfurization slurry flash evaporation heat-extraction system according to claim 1, characterized in that a desulfurization slurry inlet is connected with a slurry distribution pipe bundle (4), the slurry distribution pipe bundle (4) is positioned in the flash tower (1), the slurry distribution pipe bundle (4) is horizontally arranged, a plurality of slurry outlets are uniformly distributed on the slurry distribution pipe bundle (4) along the axial direction of the slurry distribution pipe bundle, and the slurry outlets are arranged towards the bottom of the flash tower (1).
6. A vertically arranged desulphurized slurry flash distillation heat extraction system according to claim 5 wherein one slurry nozzle (5) is connected to each slurry outlet.
7. The vertically-arranged desulfurization slurry flash evaporation heat-extraction system according to claim 1, characterized in that the cooling water inlet is connected with a water distribution pipe bundle (7), the water distribution pipe bundle (7) is positioned in the spray tower (10), the water distribution pipe bundle (7) is horizontally arranged, a plurality of water outlets are uniformly distributed on the water distribution pipe bundle (7) along the axial direction, and the water outlets are arranged towards the bottom of the spray tower (10).
8. The vertically arranged desulfurized slurry flash vaporization and heat extraction system of claim 7 wherein one cooling water nozzle is connected to each water outlet.
9. The vertically arranged desulfurization slurry flash evaporation heat-extraction system according to claim 1, wherein the desulfurization slurry inlet and the cooling water inlet are both connected with a pump.
10. A method for operating a desulfurization slurry flash evaporation heat-extraction system based on the vertical layout of any one of claims 1 to 9, which is characterized by comprising the following steps:
the desulfurization slurry enters the flash tower (1) through a desulfurization slurry inlet, the vacuum pump (8) pumps the flash tower (1) and the spray tower (10) into a negative pressure environment, the desulfurization slurry is subjected to flash evaporation, and the flash-evaporated water vapor enters the spray tower (10) through a connecting pipe (13); cooling water enters the spray tower (10) through the cooling water inlet, and the water vapor flashed out is cooled and condensed, mixed with the water vapor and then flows out from the cooling water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111447069.5A CN114014402A (en) | 2021-11-30 | 2021-11-30 | Vertical-layout desulfurization slurry flash evaporation heat extraction system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111447069.5A CN114014402A (en) | 2021-11-30 | 2021-11-30 | Vertical-layout desulfurization slurry flash evaporation heat extraction system and working method thereof |
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| CN114014402A true CN114014402A (en) | 2022-02-08 |
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| CN202111447069.5A Pending CN114014402A (en) | 2021-11-30 | 2021-11-30 | Vertical-layout desulfurization slurry flash evaporation heat extraction system and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114797407A (en) * | 2022-05-31 | 2022-07-29 | 华能营口热电有限责任公司 | Two-stage vacuumizing desulfurization slurry flash evaporation heat extraction system and method |
| WO2023097893A1 (en) * | 2021-11-30 | 2023-06-08 | 中国华能集团清洁能源技术研究院有限公司 | Vertically integrated desulfurization slurry flash evaporation heat extraction system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023097893A1 (en) * | 2021-11-30 | 2023-06-08 | 中国华能集团清洁能源技术研究院有限公司 | Vertically integrated desulfurization slurry flash evaporation heat extraction system |
| CN114797407A (en) * | 2022-05-31 | 2022-07-29 | 华能营口热电有限责任公司 | Two-stage vacuumizing desulfurization slurry flash evaporation heat extraction system and method |
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