CN205878129U - Multistage flue gas waste heat utilization WGGH system - Google Patents
Multistage flue gas waste heat utilization WGGH system Download PDFInfo
- Publication number
- CN205878129U CN205878129U CN201620805180.5U CN201620805180U CN205878129U CN 205878129 U CN205878129 U CN 205878129U CN 201620805180 U CN201620805180 U CN 201620805180U CN 205878129 U CN205878129 U CN 205878129U
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- CN
- China
- Prior art keywords
- heater
- flue gas
- water inlet
- water
- heat medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model provides a multistage flue gas waste heat utilization WGGH system, includes hot media water circulation heating device and expansion tank, export of wind heater expansion tank and hot media water circulation heating device water inlet intercommunication, this hot media water circulation heating device delivery port and original flue gas cooler water inlet intercommunication, this original flue gas cooler delivery port respectively with condense water heater and clean flue gas reheater's water inlet intercommunication, clean flue gas reheater delivery port of wind heater and wind heater water inlet intercommunication, the clean flue gas reheater delivery port of wind heater still is linked together through first stop valve and wind heater hot media water circulation heating device water inlet, this wind heater soft breeze heater condenses the water heater delivery port and communicates with wind heater hot media water circulation heating device water inlet respectively. Can avoid original flue gas temperature fluctuations to influence flue gas cooler outlet temperature and clean flue gas reheater exit temperature, reach the purpose that prevents low temperature corrosion, reduces heat transfer area.
Description
Technical field
This utility model relates to energy field, is specifically related to a kind of multi-stage flue gas UTILIZATION OF VESIDUAL HEAT IN WGGH system.
Background technology
In recent years, China's most area atmospheric pollution was very serious, and acid rain and haze meteorological disaster take place frequently, serious shadow
Ring national economy and people's lives.To this end, relevant government department has put into effect relevant coal unit minimum discharge and reducing energy consumption
Planning and requirement.Flue gas from wet desulphurization out after temperature about 48-50 DEG C, if described flue gas is expelled directly out, it will cause
On-site severe contamination, it is therefore desirable to discharge after heating.In prior art, mainly having 4 kinds of mode of heatings, the first is revolution
Formula flue gas-flue gas heater, the most no longer uses owing to there is the problems such as leakage, corrosion；The second is steam-flue gas
Device, owing to expend a large amount of steam, there is also serious etching problem simultaneously and fails to promote use；The third is closed type hot
Matchmaker's waterpipe type heat-exchange system, is called again MGGH system, it may be assumed that pipe heat exchanger is arranged in desulfurizer entrance, reclaims with heat medium water
Heat, adds heat smoke by being arranged in the smoke re-heater of desulfurizer outlet, due to the corrosion of inevitable pipe heat exchanger
It is difficult to promote the use of；4th kind is low temperature enclosed heating agent waterpipe type heat-exchange system, and described system includes former gas cooler, electricity
Cleaner unit, smoke re-heater, circulating pump, auxiliary steam heater etc., the flue-gas temperature after gas cooler is reduced to 90
About DEG C, then through cleaner unit, desulfurizer, eventually passing smoke re-heater, gas cooler exit gas temperature must drop
As little as about 90 DEG C, to ensure that electric cleaner is in low low temperature state and runs, improve efficiency of dust collection, neat stress heater outlet cigarette
Temperature needs to control, at >=80 DEG C, to be also higher than 72 DEG C at underload, to prevent chimney from corroding, when gas cooler entrance cigarette
When temperature is more than 140 DEG C, smoke re-heater exit gas temperature is more than 100 DEG C, and described system can not in actual motion
Meet parameters under various operating mode, various season environment and reach design load, or in order to reach design load, heat exchange area needs
Increase more than 40%, considerably increase cost but also energy-conservation requirement can not be reached.
Utility model content
This utility model, for the deficiencies in the prior art, proposes a kind of multi-stage flue gas UTILIZATION OF VESIDUAL HEAT IN WGGH system, concrete skill
Art scheme is as follows:
A kind of multi-stage flue gas UTILIZATION OF VESIDUAL HEAT IN WGGH system, it is characterised in that: include heat medium water circulating heater (1) and swollen
Swollen water tank (2), described expansion tank (2) outlet connects with heat medium water circulating heater (1) water inlet；
This heat medium water circulating heater (1) outlet connects with former gas cooler (3) water inlet, and this former flue gas cools down
Device (3) outlet water inlet with condensation water heater (4) and neat stress reheater (5) respectively connects；
Described neat stress reheater (5) outlet connects with wind heater (6) water inlet；
Described neat stress reheater (5) outlet is also through the first stop valve (7) and described heat medium water circulating heater (1)
Water inlet is connected；
This wind heater (6) and described condensation water heater (4) outlet respectively with described heat medium water circulating heater
(1) water inlet connection；
Described heat medium water circulating heater (1) includes heat medium water circulating pump (8) and auxiliary steam heater (9), in institute
Stating heat medium water circulating pump (8) water inlet and be communicated with the second stop valve (10), described auxiliary steam heater (9) water inlet is by the
Three stop valves (11) connection is at described second stop valve (10) water inlet port, and outlet is connected in institute by the 4th stop valve (12)
State the second stop valve (7) water outlet port；
Described heat medium water circulating heater (1) water inlet is described second stop valve (10) water inlet port, and outlet is
Described heat medium water circulating pump (8) outlet.
For preferably realizing this utility model, may further be:
Heat medium water uses demineralized water.
Further: between described former gas cooler (3) and neat stress reheater (5), to be serially connected with flue demister.
The beneficial effects of the utility model are: first, and former flue-gas temperature influence of fluctuations gas cooler can be avoided to export
Temperature and neat stress reheater outlet temperature, reach to prevent cold end corrosion, the purpose of minimizing heat exchange area.Second, possess more
Regulating measure flexibly, can adjust flue gas waste heat recovery according to variation of ambient temperature utilizes purposes, reach not only environmental protection but also
Energy-conservation purpose.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
As shown in Figure 1: a kind of multi-stage flue gas UTILIZATION OF VESIDUAL HEAT IN WGGH system, including heat medium water circulating heater 1 and expansion
Water tank 2, expansion tank 2 outlet connects with heat medium water circulating heater 1 water inlet；
This heat medium water circulating heater 1 outlet connects with former gas cooler 3 water inlet, this former gas cooler 3
Outlet water inlet with condensation water heater 4 and neat stress reheater 5 respectively connects；
Neat stress reheater 5 outlet connects with wind heater 6 water inlet；
Neat stress reheater 5 outlet is also connected with heat medium water circulating heater 1 water inlet through the first stop valve 7；
This wind heater 6 connects with heat medium water circulating heater 1 water inlet respectively with condensation water heater 4 outlet；
Heat medium water circulating heater 1 includes heat medium water circulating pump 8 and auxiliary steam heater 9, at heat medium water circulating pump 8
Water inlet is communicated with the second stop valve 10, and auxiliary steam heater 9 water inlet is connected in the second cut-off by the 3rd stop valve 11
Valve 10 is intake port, and outlet is connected at the second stop valve 7 water outlet port by the 4th stop valve 12；
Heat medium water circulating heater 1 water inlet is that the second stop valve 10 is intake port, and outlet is heat medium water circulating pump 8
Outlet.
Work process: in use, former gas cooler 3 is arranged between boiler air preheater and electric cleaner, neat stress
Reheater 5 is arranged in desulfurization outlet, and wind heater 6 is arranged in bellows, and condensation water heater 4 is according to the low adding system of unit
Distribution of water temperature and arrange.Heat medium water used is power plant's demineralized water.Purpose is to be reduced to electric cleaner entrance flue gas temperature
90 DEG C, effectively remove the SO in flue gas3, it is to avoid cold end corrosion.
Exhaust gas temperature, winter and summer can differ about 20 DEG C, and in boiler actual motion, exhaust gas temperature can be
Between 120-160 DEG C；Meanwhile, winter and atmospheric temperature in summer can differ 20-40 DEG C, for most of areas, the cigarette in chimney
Gas is to reach same diffusion effect, needs winter to be heated to more than 80 DEG C, and needs only to summer be heated to more than 72 DEG C；No
The biggest adjustment space can be had with the fume afterheat Land use systems in season.
For winter condition, flue-gas temperature is reduced to about 90 DEG C by 165 DEG C by former gas cooler 3, smoke re-heater 5
Neat stress is heated to about 80 DEG C by 48 DEG C；Heat medium water after cooling is through wind heater 6, by a secondary wind by 5 DEG C of heating
To more than 50 DEG C, both met environment protection emission requirement, and increased again the pathogenic wind-warm entering boiler, improve boiler efficiency.
For summer condition, flue-gas temperature is reduced to about 90 DEG C by 155 DEG C by former gas cooler 3, smoke re-heater 5
Neat stress is heated to about 72 DEG C by 50 DEG C；Wind heater 6 can temporarily be stopped transport, and condenses water and is extracted out by No. 8 low entrances that add, warp
It is heated to about 60 DEG C by 32 DEG C after crossing condensation water heater 2, is back to No. 6 and low adds entrance, so can squeeze steam turbine and draw gas, joint
Can lower consumption, reach achieving environmental protection and energy saving purpose.
For season in spring and autumn, neat stress reheater 3 can be adjusted flexibly export according to unit load and the change of temperature
Temperature, wind heater 6 outlet temperature and condensation water heater 2 exit water temperature.
After the mode that operates above all can carry out being heated to predetermined temperature via auxiliary steam heater 9, then followed by heat medium water
Ring pump 8 continues to put out circulation, reaches to adjust the entrance heat medium water water temperature of former gas cooler 3, it is ensured that its reach 70 DEG C and more than,
In the range of ensureing that former gas cooler 3 heat exchanger tube operates in safe wall temperature.
Claims (3)
1. a multi-stage flue gas UTILIZATION OF VESIDUAL HEAT IN WGGH system, it is characterised in that: include heat medium water circulating heater (1) and expand
Water tank (2), described expansion tank (2) outlet connects with heat medium water circulating heater (1) water inlet；
This heat medium water circulating heater (1) outlet connects with former gas cooler (3) water inlet, this former gas cooler
(3) outlet water inlet with condensation water heater (4) and neat stress reheater (5) respectively connects；
Described neat stress reheater (5) outlet connects with wind heater (6) water inlet；
Described neat stress reheater (5) outlet is also intake with described heat medium water circulating heater (1) through the first stop valve (7)
Mouth is connected；
This wind heater (6) and described condensation water heater (4) outlet enter with described heat medium water circulating heater (1) respectively
The mouth of a river connects；
Described heat medium water circulating heater (1) includes heat medium water circulating pump (8) and auxiliary steam heater (9), in described heat
Matchmaker's water-circulating pump (8) water inlet is communicated with the second stop valve (10), and described auxiliary steam heater (9) water inlet passes through the 3rd section
Only valve (11) connection is intake port described second stop valve (10), outlet by the 4th stop valve (12) connection described the
Two stop valves (7) water outlet port；
Described heat medium water circulating heater (1) water inlet is described second stop valve (10) water inlet port, and outlet is described
Heat medium water circulating pump (8) outlet.
A kind of multi-stage flue gas UTILIZATION OF VESIDUAL HEAT IN WGGH system, it is characterised in that: heat medium water uses
Demineralized water.
A kind of multi-stage flue gas UTILIZATION OF VESIDUAL HEAT IN WGGH system, it is characterised in that: cold at described former flue gas
But it is serially connected with flue demister between device (3) and neat stress reheater (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620805180.5U CN205878129U (en) | 2016-07-28 | 2016-07-28 | Multistage flue gas waste heat utilization WGGH system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620805180.5U CN205878129U (en) | 2016-07-28 | 2016-07-28 | Multistage flue gas waste heat utilization WGGH system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205878129U true CN205878129U (en) | 2017-01-11 |
Family
ID=57698630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620805180.5U Expired - Fee Related CN205878129U (en) | 2016-07-28 | 2016-07-28 | Multistage flue gas waste heat utilization WGGH system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205878129U (en) |
-
2016
- 2016-07-28 CN CN201620805180.5U patent/CN205878129U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20170728 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |