CN209116583U - A kind of residual heat of electric power plant utilization system - Google Patents
A kind of residual heat of electric power plant utilization system Download PDFInfo
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- CN209116583U CN209116583U CN201821900926.6U CN201821900926U CN209116583U CN 209116583 U CN209116583 U CN 209116583U CN 201821900926 U CN201821900926 U CN 201821900926U CN 209116583 U CN209116583 U CN 209116583U
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Abstract
The utility model relates to a kind of residual heat of electric power plant utilization systems, belong to residual heat of electric power plant and utilize field.This system extracts circulating water afterheat by absorption heat pump using a part of high-temperature flue gas and is provided out circulating hot water, and circulating hot water is used for heating gas and cold net discharge flue gas after another part high-temperature flue gas secondary heat exchange.The utility model improves as-fired coal temperature degree, achievees the purpose that improve plant thermal efficiency；It heats cold net discharge flue gas and reaches chimney of electric plant and take off white environmental requirement；Air-introduced machine inlet flue gas temperature is reduced, air-introduced machine power consumption is reduced；It is lowered into the smoke temperature of desulfurizing tower, reduces spray desuperheating water consumption, has saved water resource.
Description
Technical field
The utility model belongs to residual heat of electric power plant using field, is related to a kind of residual heat of electric power plant utilization system.
Background technique
Consistent dedusting, the desulfurization for very focusing on power-plant flue gas in power plant environment pollution harnessing, coal-fired clean processing, with
And the pollution emission standard of strict control nucleic, huge heat contained by recirculated cooling water is thrown aside in the possible negative hot shadow of environment
Ring, in addition thermal pollution harm be but easy it is ignored.
Electric power plant circulating water is compared with currently used low-temperature heat source, and have significant advantage: 1) heat contained is huge, temperature
It spends moderate and stablizes；2) water quality is good, compared with surface water, municipal sewage, will not influence heat transfer effect because of factors such as burn into obstructions
Fruit；3) environment protecting is significant, due to utilizing waste heat, can reduce heat dissipation and moisture evaporation of the cooling tower to environment, reduce to power plant
The hot wet soiling of surrounding enviroment.In recent years, heat pump techniques had obtained popularity application in China, and heat pump can be using absorption
Formula, using steam, combustion gas, flue gas etc. as drive energy.
The wet flue gas of chimney of electric plant discharge is in contact with the lower surrounding air of temperature, flue gas cool-down, in the process
In flue gas institute's moisture vapor supersaturation condense, condensing water droplet to light generate refraction, scattering, thus make plume show white or
" wet plume " (being commonly called as " big white cigarette ", " white haze " etc.) of person's grey.When wet flue gas discharges, the rising height of " plume " can be dropped
Low, diffusion effect is relatively poor, and flooring concentration of the pollutant near chimney will increase, and aggravates gray haze phenomenon, influences visibility.
When environment temperature is low, defogging effect is poor, it is likely that " chimney rain " phenomenon occurs, while being unfavorable for plume rise diffusion,
Local acid rain, corrosion engineering facility and building etc. can even be aggravated.Wet plume phenomenon has seriously affected power plant's nearby residents
Production and living weaken the public to the satisfaction of environmental protection work, and the resident of quite a few near power station is to wet plume
Improvement proposes related demand, and local department, government concerned also proposes requirement to the control of wet plume.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of residual heat of electric power plant utilization systems, using heat pump skill
Art, using flue gas as drive energy, is extracted electric power plant circulating water waste heat, uses high-temperature flue gas using electric power plant circulating water as low-temperature heat source
Reheating heat pump outlet recirculated water improves its temperature again, high-temperature-hot-water heating gas and takes off as neat stress white.
In order to achieve the above objectives, the utility model provides the following technical solutions:
A kind of residual heat of electric power plant utilization system, including condenser (1), absorption heat pump (2), air preheater (3), cigarette
Air-water heat exchanger (4), heat-exchanger pump (5), gas heater (6), neat stress-water- to-water heat exchanger (7), air-introduced machine (8) and desulfurizing tower and
Wet electricity (9)；
The condenser (1) is connect using recirculated water branch pipe with absorption heat pump (2)；
The high-temperature flue gas of air preheater (3) discharge is divided into two parts, a part of into absorption heat pump (2), another portion
Divide into gas-water heat exchanger (4), exhaust gas volumn adjusting is carried out using valve；
The absorption heat pump (2), gas-water heat exchanger (4), gas heater (6) and neat stress-water- to-water heat exchanger (7)
It is connected by closed cycle waterpipe, provides circulation power by heat-exchanger pump (5)；
The absorption heat pump (2), gas-water heat exchanger (4) and entrance air-introduced machine (8) are sequentially connected；The high temperature cigarette
Gas is by entering air-introduced machine (8) behind absorption heat pump (2) and gas-water heat exchanger (4) cooling；
Air-introduced machine (8) exiting flue gas enters neat stress-water- to-water heat exchanger (7) after desulfurizing tower and wet electric (9), net cigarette
Gas is heated to be taken off white heel row and goes out chimney.
Further, the absorption heat pump (2) is provided with valve, for controlling closed cycle water, to control extraction
Low-temperature heat quantity, by valve control enter absorption heat pump (2) high-temperature flue gas amount, to control the entrance of high temperature heat source
Amount.
Further, the recirculated water in the closed cycle waterpipe is after absorption heat pump (2) heat absorption, and temperature rises to 75~
90 DEG C, the recirculated water after heating enters back into gas-water heat exchanger (4) and carries out secondary heat exchange, final control loop water supply water temperature
180 DEG C of >.
Further, the gas-water heat exchanger (4) successively connects with gas heater (6) and neat stress-water- to-water heat exchanger (7)
It connecing, the high temperature circulation water that gas-water heat exchanger (4) comes out respectively enters gas heater (6) and neat stress-water- to-water heat exchanger (7),
Heat temperature raising is carried out to coal gas and neat stress, wherein gas temperature improves.
Further, the gas heater (6) and neat stress-water- to-water heat exchanger (7) be provided with valve for control entrance
Cycling hot water, for gas temperature can be improved to greatest extent again while meeting neat stress and taking off white requirement.
Further, the gas heater (6), neat stress-water- to-water heat exchanger (7) and chimney are an integral device.
Further, the high-temperature flue gas of air preheater (3) discharge is exchanged heat by absorption heat pump (2) and gas-water
After device (4) heat exchange, flue-gas temperature is down to~100 DEG C, and temperature controls more than flue gas dew point temperature.
Further, the flue-gas temperature in the air-introduced machine (8) reduces, i.e., reduces into the volume flow of blower, to drop
The power consumption of low air-introduced machine；
The desulfurizing tower and the wet type desulfurizing optimal reaction temperature of wet electric (9) are 50~60 DEG C, the cigarette of air-introduced machine (8) outlet
Temperature degree reduces the desuperheat amount of water sprayed for reducing desulfurizing tower inlet flue gas.
The utility model has the beneficial effects that:
(1) it is extracted electric power plant circulating water waste heat, improves residual heat of electric power plant utilization rate；
(2) fume afterheat is adequately and reasonably utilized；
(3) boiler inlet gas temperature and plant thermal efficiency are improved；
(4) " plume " phenomenon for eliminating chimney emission, meets environmental requirements；
(5) air-introduced machine inlet flue gas temperature and blower power consumption are reduced；
(6) desulfurizing tower inlet flue gas temperature and amount of water sprayed are reduced, water resource has been saved.
Detailed description of the invention
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, the utility model provides as follows
Attached drawing is illustrated:
Fig. 1 is the recycling of electric power plant circulating water waste heat, flue gas waste heat recovery, heated by gas, neat stress heating, wet desulfurization system
Schematic diagram.
Appended drawing reference: 1- condenser, 2- absorption heat pump, 3- air preheater, 4- gas-water heat exchanger, 5- heat-exchanger pump,
6- gas heater, 7- neat stress-water- to-water heat exchanger, 8- air-introduced machine, 9- desulfurizing tower and wet electricity.
Specific embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
Referring to Fig. 1, the system that the utility model includes has electric power plant circulating water residual neat recovering system, flue gas waste heat recovery system
System, closed hot water circulation system, gas heating system, neat stress heating system, wet desulphurization tower and wet electric system.
Electric power plant circulating water residual neat recovering system is attached condenser 1 and absorption heat pump 2 by circulating water pipeline,
Using circulating water afterheat as the low-temperature heat source of absorption heat pump, pass through valve control loop water.
Flue gas waste heat recovery system, high-temperature flue gas are divided into two parts, and a part air preheater 3 and is absorbed by flue
Formula heat pump 2 is attached, and using high-temperature flue gas as the high temperature heat source of absorption heat pump, controls exhaust gas volumn by valve；Another portion
Divide and air preheater 3 and gas-water heat exchanger 4 are attached by flue, using high-temperature flue gas as the high temperature side of heat exchanger
Heat source controls exhaust gas volumn by valve.
Closed hot water circulation system adds absorption heat pump 2, gas-water heat exchanger 4, heat-exchanger pump 5, coal gas by pipeline
Hot device 6 and neat stress-water- to-water heat exchanger 7 are connected, and form closed hot water circulation system, hot water is in absorption heat pump 2 and flue gas-
It absorbs heat in water- to-water heat exchanger 4, radiates in gas heater 6 and neat stress-water- to-water heat exchanger 7.Heat-exchanger pump 5 provides circulation
Power, mating voltage-stabilizing system.
Gas heating system, by plate heat exchanger or heat-pipe heat exchanger, hot side is hot water, and cold side is coal gas, is led to
Cross valve control hot water flow.
Neat stress heating system, by plate heat exchanger or heat-pipe heat exchanger, hot side is hot water, and cold side is net cigarette
Gas controls hot water flow by valve.
The absorption heat pump 2 is provided with valve, for controlling closed cycle water, to control the Low Temperature Thermal of extraction
Amount enters the high-temperature flue gas amount of absorption heat pump 2 by valve control, to control the inlet of high temperature heat source.
Recirculated water in the closed cycle waterpipe is after the heat absorption of absorption heat pump 2, and temperature rises to 75~90 DEG C, heating
Recirculated water afterwards enter back into gas-water heat exchanger 4 carry out secondary heat exchange, final 180 DEG C of control loop water supply water temperature >.
The high temperature circulation water that the gas-water heat exchanger 4 comes out respectively enters gas heater 6 and neat stress-water heat exchange
Device 7 carries out heat temperature raising to coal gas and neat stress, and wherein gas temperature improves, and achievees the purpose that improve plant thermal efficiency, net cigarette
The raising of temperature degree reaches power plant and takes off white environment protection emission requirement.
The valve that is provided with of the gas heater 6 and neat stress-water- to-water heat exchanger 7 is used to control the circulating hot water entered
Amount, so that heating efficiency is controlled, for coal can be improved to greatest extent again while meeting neat stress and taking off white requirement
Temperature degree.
The gas heater 6, neat stress-water- to-water heat exchanger 7 and chimney are an integral device.
After the high-temperature flue gas that the air preheater 3 is discharged is exchanged heat by absorption heat pump 2 and gas-water heat exchanger 4, cigarette
Temperature degree is down to~100 DEG C, and temperature controls more than flue gas dew point temperature.
The flue-gas temperature of the air-introduced machine 8 reduces, that is, the volume flow of blower is lowered into, to reduce the electricity of air-introduced machine
Consumption；
The desulfurizing tower and wet electric 9 wet type desulfurizing optimal reaction temperature be 50~60 DEG C, air-introduced machine 8 export flue gas temperature
Degree reduces the desuperheat amount of water sprayed for reducing desulfurizing tower inlet flue gas.
Finally, it is stated that preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, can make various changes, without departing from the utility model claims book institute to it in the form and details
The range of restriction.
Claims (8)
1. a kind of residual heat of electric power plant utilization system, it is characterised in that: pre- including condenser (1), absorption heat pump (2), air
Hot device (3), gas-water heat exchanger (4), heat-exchanger pump (5), gas heater (6), neat stress-water- to-water heat exchanger (7), air-introduced machine (8)
With desulfurizing tower and wet electricity (9)；
The condenser (1) is connect using recirculated water branch pipe with absorption heat pump (2)；
The high-temperature flue gas of the air preheater (3) discharge is divided into two parts, a part into absorption heat pump (2), another part into
Gas-water heat exchanger (4) carries out exhaust gas volumn adjusting using valve；
The absorption heat pump (2), gas-water heat exchanger (4), gas heater (6) and neat stress-water- to-water heat exchanger (7) pass through
The series connection of closed cycle waterpipe provides circulation power by heat-exchanger pump (5)；
The absorption heat pump (2), gas-water heat exchanger (4) and entrance air-introduced machine (8) are sequentially connected；The high-temperature flue gas is logical
Enter air-introduced machine (8) after crossing absorption heat pump (2) and gas-water heat exchanger (4) cooling；
Air-introduced machine (8) exiting flue gas enters neat stress-water- to-water heat exchanger (7) after desulfurizing tower and wet electric (9), neat stress warp
Heating takes off white heel row and goes out chimney.
2. a kind of residual heat of electric power plant utilization system according to claim 1, it is characterised in that: the absorption heat pump
(2) it is provided with valve, for controlling closed cycle water, to control the low-temperature heat quantity of extraction, controls to enter by valve and inhale
The high-temperature flue gas amount of receipts formula heat pump (2), to control the inlet of high temperature heat source.
3. a kind of residual heat of electric power plant utilization system according to claim 1, it is characterised in that: the closed cycle water pipe
Recirculated water in road is after absorption heat pump (2) heat absorption, and temperature rises to 75~90 DEG C, and the recirculated water after heating enters back into flue gas-
Water- to-water heat exchanger (4) progress secondary heat exchange, final 180 DEG C of control loop water supply water temperature >.
4. a kind of residual heat of electric power plant utilization system according to claim 1, it is characterised in that: the gas-water heat exchange
Device (4) is successively connect with gas heater (6) and neat stress-water- to-water heat exchanger (7), and the high temperature that gas-water heat exchanger (4) comes out follows
Ring water respectively enters gas heater (6) and neat stress-water- to-water heat exchanger (7), carries out heat temperature raising to coal gas and neat stress, wherein
Gas temperature improves.
5. a kind of residual heat of electric power plant utilization system according to claim 1, it is characterised in that: the gas heater
(6) and the valve that is provided with of neat stress-water- to-water heat exchanger (7) is used to control the cycling hot water entered, for meeting neat stress
Gas temperature can be improved while taking off white requirement to greatest extent again.
6. a kind of residual heat of electric power plant utilization system according to claim 1, it is characterised in that: the gas heater
(6), neat stress-water- to-water heat exchanger (7) and chimney are an integral device.
7. a kind of residual heat of electric power plant utilization system according to claim 1, it is characterised in that: the air preheater
(3) after the high-temperature flue gas being discharged is by absorption heat pump (2) and gas-water heat exchanger (4) heat exchange, flue-gas temperature is down to~100
DEG C, temperature controls more than flue gas dew point temperature.
8. a kind of residual heat of electric power plant utilization system according to claim 1, it is characterised in that: in the air-introduced machine (8)
Flue-gas temperature reduce, i.e., into blower volume flow reduce, to reduce the power consumption of air-introduced machine；
The desulfurizing tower and the wet type desulfurizing optimal reaction temperature of wet electric (9) are 50~60 DEG C, the flue gas temperature of air-introduced machine (8) outlet
Degree reduces the desuperheat amount of water sprayed for reducing desulfurizing tower inlet flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821900926.6U CN209116583U (en) | 2018-11-19 | 2018-11-19 | A kind of residual heat of electric power plant utilization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821900926.6U CN209116583U (en) | 2018-11-19 | 2018-11-19 | A kind of residual heat of electric power plant utilization system |
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| Publication Number | Publication Date |
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| CN209116583U true CN209116583U (en) | 2019-07-16 |
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| CN201821900926.6U Active CN209116583U (en) | 2018-11-19 | 2018-11-19 | A kind of residual heat of electric power plant utilization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405351A (en) * | 2018-11-19 | 2019-03-01 | 重庆赛迪热工环保工程技术有限公司 | A kind of residual heat of electric power plant utilization system |
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2018
- 2018-11-19 CN CN201821900926.6U patent/CN209116583U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405351A (en) * | 2018-11-19 | 2019-03-01 | 重庆赛迪热工环保工程技术有限公司 | A kind of residual heat of electric power plant utilization system |
| CN109405351B (en) * | 2018-11-19 | 2024-03-12 | 重庆赛迪热工环保工程技术有限公司 | Comprehensive utilization system for waste heat of power plant |
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