CN204100844U - Thermal power plant's Air-cooled Unit hot-air recycling system - Google Patents
Thermal power plant's Air-cooled Unit hot-air recycling system Download PDFInfo
- Publication number
- CN204100844U CN204100844U CN201420600867.6U CN201420600867U CN204100844U CN 204100844 U CN204100844 U CN 204100844U CN 201420600867 U CN201420600867 U CN 201420600867U CN 204100844 U CN204100844 U CN 204100844U
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- air
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- waste gas
- steam
- fan
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- 238000004064 recycling Methods 0.000 title claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 239000002912 waste gas Substances 0.000 claims abstract description 28
- 239000003245 coal Substances 0.000 claims abstract description 14
- 210000004907 gland Anatomy 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003546 flue gas Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000000203 mixture Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Air Supply (AREA)
Abstract
Thermal power plant's Air-cooled Unit hot-air recycling system, it relates to a kind of gas recovery system, and to solve in existing Air-cooled Unit, 40 ~ 50 DEG C of used heat air after being heated by air cooling tubes condenser directly enter the problem in air.The steam (vapor) outlet of boiler is connected with steam turbine by steam pipe, the exhaust vent of steam turbine is connected with air-cooled condenser by gland steam exhauster, the delivery port of air-cooled condenser is communicated with the water-cooling wall of boiler by return pipe, feed pump is arranged on return pipe, flue gas leading on air-cooled condenser divides two-way to introduce in the supply air system of boiler, wherein a road waste gas by the first waste gas siphunculus through pressure fan flapper valve, pressure fan, coal pulverizer passes in the supply air system of boiler, wherein another road waste gas by the second waste gas siphunculus through primary air fan flapper valve, primary air fan, air preheater, coal pulverizer passes in the supply air system of boiler.The utility model is used for Air-cooled Unit hot-air and reclaims.
Description
Technical field
The utility model relates to a kind of gas recovery system, is specifically related to a kind of thermal power plant Air-cooled Unit hot-air recycling system.
Background technology
Condenser is the requisite visual plant in thermal power generation unit, and condenser is a kind of heat exchanger turbine discharge being condensed into water, also known as steam condenser.Condenser is mainly used in steam turbine power plant, is divided into water-cooled condenser and air cooling tubes condenser two kinds.Condenser, except the steam discharge of steam turbine being condensed into water boiler of feeding and reusing, can also be set up vacuum and maintain vacuum, to ensure that thermal power generation unit has higher thermal efficiency of cycle at turbine discharge place.
1, the wet type type of cooling: the wet type type of cooling divides direct cooling and cooling tower two kinds.Wet type direct cooling is generally draw a certain amount of water as cooling water in the natural water bodies such as the Congjiang, river, lake, sea, and process for cooling equipment draws used heat makes water temperature raise, then enters river, river, lake, sea.When not possessing direct cooling condition, then need to cool with cooling tower.The effect of cooling tower is that the cooling water of used heat of carrying under one's arms is carried out heat exchange at Ta Nei and air, makes used heat be transferred to air and spills into air.
2, dry calibration mode (air cooling system): in water-deficient area, supplements because the water lost in cooling procedure is very difficult, adopts air cooled mode to address this problem well.In Air-cooling Process, the heat exchange of air and water (or steam discharge) is the spreader surface heat transfer by being made up of metal tube, by the air that the delivered heat of the water (or steam discharge) in pipe flows outward to radiator.
Current, air cooling system for power plant mainly contains three kinds, i.e. the indirect air cooling system (Harmon dry-cooling system) of direct air cooling system, belt surface formula condenser and the indirect air cooling system (Hai Leshi air cooling system) of band injecting type (hybrid) condenser.Direct Air-Cooled is exactly utilize the direct condensation of air from the exhaust of steam turbine, and air carries out heat exchange with exhaust by radiator.In the installed capacity of current air cooling system in the world according to statistics, direct air cooling system accounts for 43%, and Indirect Dry Cooling System with Surface Condenser accounts for 24%, and direct-contact type condenser indirect air cooling system accounts for 33%.
Along with the develop rapidly of power industry, building or putting into operation a large amount of air-cooled type power plants in the northwestern of the rich coal poor-water of China in recent years.Air-cooled Unit as the cooling medium of turbine discharge, is different from water chiller using surrounding air completely.The shortcomings such as compared with water, it is little that air has thermal capacitance, and thermal conductivity factor is low, therefore direct air cooled condenser generally adopts fin tube structure, and turbine discharge carries out condensation heat in finned tube, and the condensate water of formation directly enters condensate tank; By air heat convection outside finned tube that blower fan pressurizes.The advantages such as equipment investment is few although direct air cooling system has, system simple, water saving, environmental protection, but cool turbine discharge owing to directly adopting surrounding air, 40 ~ 50 DEG C of used heat air after being heated by air cooling tubes condenser directly enter in air, not only thermal pollution is produced to environment, and waste a large amount of heat energy, and then affect the economical operation of unit.
Utility model content
The utility model is for solving in existing Air-cooled Unit, 40 ~ 50 DEG C of used heat air after being heated by air cooling tubes condenser directly enter in air, not only thermal pollution is produced to environment, and waste the problem of a large amount of heat energy, and a kind of thermal power plant Air-cooled Unit hot-air recycling system is provided.
Thermal power plant of the present utility model Air-cooled Unit hot-air recycling system comprises boiler, steam turbine, air-cooled condenser, feed pump, pressure fan flapper valve, primary air fan flapper valve, pressure fan, primary air fan, air preheater, coal pulverizer, steam pipe, gland steam exhauster, return pipe, first waste gas siphunculus and the second waste gas siphunculus, the steam (vapor) outlet of boiler is connected with steam turbine by steam pipe, the exhaust vent of steam turbine is connected with air-cooled condenser by gland steam exhauster, the delivery port of air-cooled condenser is communicated with the water-cooling wall of boiler by return pipe, feed pump is arranged on return pipe, flue gas leading on air-cooled condenser divides two-way to introduce in the supply air system of boiler, wherein a road waste gas by the first waste gas siphunculus through pressure fan flapper valve, pressure fan, coal pulverizer passes in the supply air system of boiler, wherein another road waste gas by the second waste gas siphunculus through primary air fan flapper valve, primary air fan, air preheater, coal pulverizer passes in the supply air system of boiler.
The utility model compared with prior art has following beneficial effect:
One, air-cooled condenser used heat air out divides two-way to introduce in boiler supply air system by the first waste gas siphunculus and the second waste gas siphunculus by the utility model, heat energy in air after being heated by air cooling tubes condenser in effective recycling Air-cooled Unit, on average improves the fired power generating unit thermal efficiency 3 ~ 5%.
Two, the utility model can improve the gentle secondary air temperature of boiler First air, is beneficial to boiler combustion and stablizes.
Three, the utility model does not change former Air-cooled Unit formation and equipment, and used heat air utilizes system to be provided with control valve, can regulate by boiler requirement, and system is simple, workable.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Detailed description of the invention
Detailed description of the invention one: composition graphs 1 illustrates present embodiment, present embodiment comprises boiler 1, steam turbine 2, air-cooled condenser 4, feed pump 5, steam pipe 13, gland steam exhauster 14, return pipe 15, pressure fan flapper valve 7, primary air fan flapper valve 8, pressure fan 9, primary air fan 10, air preheater 11, coal pulverizer 12, first waste gas siphunculus 16 and the second waste gas siphunculus 17, the steam (vapor) outlet of boiler 1 is connected with steam turbine 2 by steam pipe 13, the exhaust vent of steam turbine 2 is connected with air-cooled condenser 4 by gland steam exhauster 14, the delivery port of air-cooled condenser 4 is communicated with the water-cooling wall of boiler 1 by return pipe 15, feed pump 5 is arranged on return pipe 15, flue gas leading 4-1 on air-cooled condenser 4 divide two-way introduce boiler 1 supply air system in, wherein a road waste gas by the first waste gas siphunculus 16 through pressure fan flapper valve 7, pressure fan 9, coal pulverizer 12 passes in the supply air system of boiler 1, wherein another road waste gas by the second waste gas siphunculus 17 through primary air fan flapper valve 8, primary air fan 10, air preheater 11, coal pulverizer 12 passes in the supply air system of boiler 1.
Operation principle: the steam that boiler 1 produces enters steam turbine 2 red switch rotor drive electrical generators 3 and generates electricity, steam turbine 2 steam discharge is introduced air cooling tubes condenser 4 and is carried out heat exchange with cold air, and the condensate water of generation sends boiler 1 back to by feed pump 5, periodic duty like this; The used heat air of 40 DEG C ~ 50 DEG C after heating divides two-way i.e. the first waste gas siphunculus 16 and the second waste gas siphunculus 17 to introduce in boiler supply air system by air cooling tubes condenser 4, first waste gas siphunculus 16 installs pressure fan flapper valve 7, according to the quantity of hot air that boiler needs regulable control to introduce, enter air preheater 11 after being boosted by pressure fan 9 and continue heating; Second waste gas siphunculus 17 installs primary air fan flapper valve 8, according to the quantity of hot air that boiler 1 and coal pulverizer 12 need regulable control to introduce, enter air preheater 11 after being boosted by primary air fan 10 to continue after heating enters and form wind powder mixture and First air in coal pulverizer 12, to send into boiler furnace burning.
Detailed description of the invention two: composition graphs 1 illustrates present embodiment, present embodiment and detailed description of the invention one also increase unlike it emptying flapper valve 6, and emptying flapper valve 6 is arranged on flue gas leading 4-1.Emptying flapper valve 6 is for regulating the used heat air total amount introduced in boiler supply air system.When boiler large load operation, turn down the aperture of emptying flapper valve 6, the used heat air total amount of introducing boiler supply air system is strengthened; Otherwise then open large emptying flapper valve 6 aperture.Other composition and annexation identical with detailed description of the invention one.
Claims (2)
1. thermal power plant's Air-cooled Unit hot-air recycling system, described system comprises boiler (1), steam turbine (2), air-cooled condenser (4), feed pump (5), steam pipe (13), gland steam exhauster (14) and return pipe (15), the steam (vapor) outlet of boiler (1) is connected with steam turbine (2) by steam pipe (13), the exhaust vent of steam turbine (2) is connected with air-cooled condenser (4) by gland steam exhauster (14), the delivery port of air-cooled condenser (4) is communicated with the water-cooling wall of boiler (1) by return pipe (15), feed pump (5) is arranged on return pipe (15), it is characterized in that: described system also comprises pressure fan flapper valve (7), primary air fan flapper valve (8), pressure fan (9), primary air fan (10), air preheater (11), coal pulverizer (12), first waste gas siphunculus (16) and the second waste gas siphunculus (17), flue gas leading (4-1) on air-cooled condenser (4) point two-way is introduced in the supply air system of boiler (1), wherein a road waste gas by the first waste gas siphunculus (16) through pressure fan flapper valve (7), pressure fan (9), coal pulverizer (12) passes in the supply air system of boiler (1), wherein another road waste gas by the second waste gas siphunculus (17) through primary air fan flapper valve (8), primary air fan (10), air preheater (11), coal pulverizer (12) passes in the supply air system of boiler (1).
2. thermal power plant's Air-cooled Unit hot-air recycling system according to claim 1, it is characterized in that: described system also comprises emptying flapper valve (6), emptying flapper valve (6) is arranged on flue gas leading (4-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420600867.6U CN204100844U (en) | 2014-10-16 | 2014-10-16 | Thermal power plant's Air-cooled Unit hot-air recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420600867.6U CN204100844U (en) | 2014-10-16 | 2014-10-16 | Thermal power plant's Air-cooled Unit hot-air recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204100844U true CN204100844U (en) | 2015-01-14 |
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| CN201420600867.6U Expired - Fee Related CN204100844U (en) | 2014-10-16 | 2014-10-16 | Thermal power plant's Air-cooled Unit hot-air recycling system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014516A (en) * | 2016-07-21 | 2016-10-12 | 大连理工大学 | Waste heat recycling system of energy-saving type indirect air cooling tower |
| CN107906974A (en) * | 2017-10-12 | 2018-04-13 | 国网河北能源技术服务有限公司 | A kind of Air-Cooling Island surplus energy utility system |
| CN109990616A (en) * | 2019-03-06 | 2019-07-09 | 梁新强 | A system device and method for changing the condenser of a steam turbine generator set from water cooling to air cooling |
| CN111043875A (en) * | 2019-08-26 | 2020-04-21 | 华北电力大学 | A system for recycling and reusing hot air in cooling towers between power stations |
| CN114383134A (en) * | 2022-02-12 | 2022-04-22 | 武汉轻工大学 | A system and method for recycling hot air of a closed dry air cooler |
| CN115614727A (en) * | 2020-11-12 | 2023-01-17 | 深圳市博众节能工程技术有限公司 | Method for improving economical efficiency of thermal generator set |
-
2014
- 2014-10-16 CN CN201420600867.6U patent/CN204100844U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014516A (en) * | 2016-07-21 | 2016-10-12 | 大连理工大学 | Waste heat recycling system of energy-saving type indirect air cooling tower |
| CN107906974A (en) * | 2017-10-12 | 2018-04-13 | 国网河北能源技术服务有限公司 | A kind of Air-Cooling Island surplus energy utility system |
| CN107906974B (en) * | 2017-10-12 | 2019-03-22 | 国网河北能源技术服务有限公司 | A kind of Air-Cooling Island surplus energy utility system |
| CN109990616A (en) * | 2019-03-06 | 2019-07-09 | 梁新强 | A system device and method for changing the condenser of a steam turbine generator set from water cooling to air cooling |
| CN111043875A (en) * | 2019-08-26 | 2020-04-21 | 华北电力大学 | A system for recycling and reusing hot air in cooling towers between power stations |
| CN115614727A (en) * | 2020-11-12 | 2023-01-17 | 深圳市博众节能工程技术有限公司 | Method for improving economical efficiency of thermal generator set |
| CN114383134A (en) * | 2022-02-12 | 2022-04-22 | 武汉轻工大学 | A system and method for recycling hot air of a closed dry air cooler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20161016 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |