CN209431454U - A kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable - Google Patents
A kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable Download PDFInfo
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- CN209431454U CN209431454U CN201822047475.2U CN201822047475U CN209431454U CN 209431454 U CN209431454 U CN 209431454U CN 201822047475 U CN201822047475 U CN 201822047475U CN 209431454 U CN209431454 U CN 209431454U
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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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Abstract
The utility model relates to air preheater operation and boiler exhaust gas field of waste heat utilization, particularly disclose a kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable.The controllable water-borne formula steam air heater of air preheater cold-end air expansion, including air preheater, the gas-water heat exchanger being sequentially arranged in boiler back end ductwork, it is characterized by: being disposed with water-borne formula steam air heater on supply air duct where the air preheater, the heat exchanger outlet pipe of gas-water heat exchanger connects the water inlet of water-borne formula steam air heater, the introduction pipe of the heat exchanger water inlet pipe connection condensate system of gas-water heat exchanger, the steam air heater return pipe of water coal formula steam air heater are connected to main condensate pipeline；Steam air heater shunt valve is linked between heat exchanger outlet pipe and steam air heater return pipe.The utility model structure is simple, and adjustment flexibly, the import wind-warm syndrome and outlet smoke temperature of preheater is adjusted flexibly using bypass mechanism, guarantees the sealing effect and operational safety of air preheater.
Description
(1) technical field
The utility model relates to air preheater operation and boiler exhaust gas field of waste heat utilization, in particular to a kind of air are pre-
The controllable water-borne formula steam air heater of hot device cold end expansion.
(2) background technique
Large capacity fired power generating unit rotary regenerative air preheater cold end integrated temperature is lower, and cold end Expansion sealing effect is poor,
So that air-heater leakage amount is big, cold end dust stratification, blocking, corrosion condition are extremely serious, cause air preheater heat exchange efficiency
It reduces, ventilation resistance increase, unit is also resulted in when serious and is contributed by forced landing.It need to usually arrange steam warming machine or fume afterheat
Steam air heater, by steam or fume afterheat heating boiler blow in the way of, prevent control preheater corrosion, but due to heating cold wind
Temperature is lower, and the promotion of cold end integrated temperature is limited, and Expansion sealing is ineffective, cannot guarantee air preheat within the scope of full load
The operational safety of device.
(3) summary of the invention
The utility model in order to make up for the deficiencies of the prior art, provides that a kind of structure is simple, sealing effect is good, using spirit
The controllable water-borne formula steam air heater of living, operational safety air preheater cold-end air expansion.
The utility model is achieved by the following technical solution:
A kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable, including along flue gas stream in boiler back end ductwork
Air preheater that dynamic direction is sequentially arranged, gas-water heat exchanger, it is characterised in that: the air-supply where the air preheater
Water-borne formula steam air heater is disposed on air duct, the heat exchanger outlet pipe of gas-water heat exchanger connects the water inlet of water-borne formula steam air heater,
The introduction pipe of the heat exchanger water inlet pipe connection condensate system of gas-water heat exchanger, the steam air heater return water of water coal formula steam air heater
Pipe is connected to main condensate pipeline；Steam air heater shunt valve is linked between heat exchanger outlet pipe and steam air heater return pipe.
The utility model arranges gas-water heat exchanger in boiler back end ductwork, arranges that water-borne formula is warm in supply air duct
Wind device, by the steam air heater shunt valve of water-borne formula steam air heater inlet and outlet design, adjustment bypass water changes water-borne formula steam air heater
Heat exchange amount, to change air preheater cold-end air integrated temperature.
The more excellent technical solution of the utility model are as follows:
Booster is installed on the heat exchanger water inlet pipe, main condensate, boosted pumping are drawn from condensate system
Enter gas-water heat exchanger, water-borne formula steam air heater heat release is entered after heat absorption, return water is back to main condensate pipeline.
Bypass valve is installed on the steam air heater shunt valve, for controlling the cold wind temperature for entering air preheater.
Mixed water temperature regulating valve is installed on the introduction pipe of the condensate system, to the water flow in introduction pipe into
Row is adjusted.
Deduster is disposed in the flue, gas-water heat exchanger is arranged in house outlet rear pass, and steam air heater returns
The tie point of water pipe and main condensate pipeline is before the dry point of low-temperature condensate.
It is disposed with deduster in the flue, gas-water heat exchanger is arranged in the flue before deduster entrance, warm wind
The tie point of device return pipe and main condensate pipeline is after the dry point of condensed water in high temperature.
The raising of air preheater import cold wind temperature and exit gas temperature improves the synthesis of air preheater cold-end air
The cold end expansion clearance of tube wall temperature, air preheater becomes smaller, and strengthens Expansion sealing effect, it is stifled to mitigate air preheater cold-end air
Ash, burn into leak out.The inlet and outlet design bypass of water-borne formula steam air heater, can under the variable working condition such as boiler load variation, seasonal variations,
It avoids causing air pre-heater sealing deterioration or sound component friction because of entrance wind-warm syndrome underheat or excessively heating, controls cold end
Expansion guarantees that air preheater operates normally.
The utility model structure is simple, and adjustment flexibly, using smoke discharging residual heat greatly heating boiler cold wind, utilizes side
Road mechanical flexibility adjusts the import wind-warm syndrome and outlet smoke temperature of preheater, controls air preheater cold-end air integrated temperature, guarantees air
The sealing effect and operational safety of preheater；The setting of the installation site of gas-water heat exchanger and water-borne formula steam air heater return water point
It can be according to actual exhaust gas temperature and on-site actual situations flexible arrangement.
(4) Detailed description of the invention
The utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is the structural schematic diagram of the utility model.
In figure, 1 air preheater, 2 supply air ducts, 3 water-borne formula steam air heaters, 4 dedusters, 5 gas-water heat exchangers, 6 boostings
Pump, 7 heat exchanger water inlet pipes, 8 heat exchanger outlet pipes, 9 steam air heater return pipes, 10 steam air heater shunt valves, 11 bypass valves, 12 is mixed
Close temperature regulator.
(5) specific embodiment
Attached drawing is a kind of specific embodiment of the utility model.The embodiment includes in boiler back end ductwork along flue gas stream
Air preheater 1 that dynamic direction is sequentially arranged, gas-water heat exchanger 5, cloth on the supply air duct 2 where the air preheater 1
It is equipped with water-borne formula steam air heater 3, the heat exchanger outlet pipe 8 of gas-water heat exchanger 5 connects the water inlet of water-borne formula steam air heater 3, cigarette
The heat exchanger water inlet pipe 7 of air-water heat exchanger 5 is connected to the introduction pipe of condensate system, the steam air heater return water of water coal formula steam air heater 3
Pipe 9 is connected to main condensate pipeline；Steam air heater shunt valve 10 is linked between heat exchanger outlet pipe 8 and steam air heater return pipe 9.
Booster 6 is installed on the heat exchanger water inlet pipe 7；Bypass valve is installed on the steam air heater shunt valve 10
11；Mixed water temperature regulating valve 12 is installed on the introduction pipe of the condensate system.
Deduster 4 is disposed in the flue, gas-water heat exchanger 5 is arranged in deduster 4 and exports in rear pass, warm wind
The tie point of device return pipe 9 and main condensate pipeline is before the dry point of low-temperature condensate；Dedusting is disposed in the flue
Device 4, gas-water heat exchanger 5 are arranged in the flue before 4 entrance of deduster, steam air heater return pipe 9 and main condensate pipeline
Tie point is after the dry point of condensed water in high temperature.
The utility model exports the gas-water heat exchanger 5 installed in (or entrance) flue in deduster 4, and heat exchanger enters water
Booster 6 is set on pipe 7, draws low-pressure heater water outlet from condensate system, is controlled and mixed by mixed water temperature regulating valve 12
Water temperature is not less than setting value afterwards.It is water-borne in boiler supply air duct 2 into being arranged in through heat exchanger outlet pipe 8 after condensed water heat absorption
Formula steam air heater 3, heating boiler are blown to setting value, and return water takes through steam air heater return pipe 9 into condensate system low temperature after heat release
Before water spot (or after condensate system high temperature dry point), circulation loop is completed.Steam air heater shunt valve 10 is arranged in system, passes through
Bypass valve 11 adjusts the cold wind temperature for entering air preheater 1.
Greatly heating boiler cold wind, raising 1 cold end of air preheater are comprehensive using smoke discharging residual heat for the utility model
Temperature strengthens cold end Expansion sealing effect, reduces air preheater 1 and leaks out, and reduces the stifled ash of burn into of cold end；Simultaneously by warm
Wind device Bypass Control enters the cold wind temperature of air preheater 1, adjusts cold end integrated temperature, avoids that temperature rise is excessively high, expansion is excessive
Cause the sharp increase of 1 running current of air preheater or temperature rise deficiency, Expansion sealing that cannot play a role completely, ensure that air
The operational safety of preheater 1.
Claims (6)
1. a kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable, including along flow of flue gas in boiler back end ductwork
Air preheater (1) that direction is sequentially arranged, gas-water heat exchanger (5), it is characterised in that: where the air preheater (1)
Supply air duct (2) on be disposed with water-borne formula steam air heater (3), the heat exchanger outlet pipe (8) of gas-water heat exchanger (5) connects water
The water inlet of matchmaker's formula steam air heater (3), the fairlead of heat exchanger water inlet pipe (7) the connection condensate system of gas-water heat exchanger (5)
The steam air heater return pipe (9) in road, water coal formula steam air heater (3) is connected to main condensate pipeline；Heat exchanger outlet pipe (8) and steam air heater return
Steam air heater shunt valve (10) are linked between water pipe (9).
2. the controllable water-borne formula steam air heater of air preheater cold-end air expansion according to claim 1, it is characterised in that: described
Booster (6) are installed on heat exchanger water inlet pipe (7).
3. the controllable water-borne formula steam air heater of air preheater cold-end air expansion according to claim 1, it is characterised in that: described
Bypass valve (11) are installed on steam air heater shunt valve (10).
4. the controllable water-borne formula steam air heater of air preheater cold-end air expansion according to claim 1, it is characterised in that: described
Mixed water temperature regulating valve (12) are installed on the introduction pipe of condensate system.
5. the controllable water-borne formula steam air heater of air preheater cold-end air expansion according to claim 1, it is characterised in that: described
It is disposed in flue deduster (4), gas-water heat exchanger (5) is arranged in deduster (4) outlet rear pass, steam air heater return water
The tie point of pipe (9) and main condensate pipeline is before the dry point of low-temperature condensate.
6. the controllable water-borne formula steam air heater of air preheater cold-end air expansion according to claim 1, it is characterised in that: described
It is disposed in flue deduster (4), gas-water heat exchanger (5) is arranged in the flue before deduster (4) entrance, steam air heater
The tie point of return pipe (9) and main condensate pipeline is after the dry point of condensed water in high temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822047475.2U CN209431454U (en) | 2018-12-07 | 2018-12-07 | A kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822047475.2U CN209431454U (en) | 2018-12-07 | 2018-12-07 | A kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209431454U true CN209431454U (en) | 2019-09-24 |
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ID=67970715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822047475.2U Active CN209431454U (en) | 2018-12-07 | 2018-12-07 | A kind of water-borne formula steam air heater that air preheater cold-end air expansion is controllable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209431454U (en) |
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2018
- 2018-12-07 CN CN201822047475.2U patent/CN209431454U/en active Active
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