CN218626806U - Water supply and air heating system for power station boiler - Google Patents
Water supply and air heating system for power station boiler Download PDFInfo
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- CN218626806U CN218626806U CN202223152959.6U CN202223152959U CN218626806U CN 218626806 U CN218626806 U CN 218626806U CN 202223152959 U CN202223152959 U CN 202223152959U CN 218626806 U CN218626806 U CN 218626806U
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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 a power plant boiler technical field specifically is a power plant boiler feeds water and air heating system, and it can effectively avoid air heater low temperature to corrode, and the guarantee lasts steady operation, can reduce equipment investment cost by a wide margin again, and unit generating efficiency is not influenced, and it includes boiler, oxygen-eliminating device, steam turbine, its characterized in that, the end input condensate water of intaking of oxygen-eliminating device, play water end are through water-feeding pump and play water piping connection the economizer one end of boiler, boiler other end steam outlet connects the steam turbine, oxygen-eliminating device and steam extraction heating air heater's heating end all are connected through steam conduit the steam extraction end of steam turbine, the air inlet end of steam extraction heating air heater connects the fan, gives vent to anger the end and connects the furnace of boiler.
Description
Technical Field
The utility model relates to a power plant boiler technical field specifically is a power plant boiler feedwater and air heating system.
Background
At present, a power station boiler generally adopts a process of heating feed water by extracting steam from a steam turbine and heating air by using boiler flue gas, and the condition of low-temperature corrosion of an air preheater generally exists. Later, a process was developed in which air was heated by feed water, an air preheater was externally installed, and the cooled feed water was heated by a flue gas cooler to achieve the designed flue gas temperature. The process solves the problem of low-temperature corrosion of the air preheater, but the equipment investment is greatly increased, and the total weight of a single boiler needs to be increased by about 15 percent according to estimation, so the economic benefit is not obvious.
Disclosure of Invention
Lead to equipment investment cost high, the poor problem of economic benefits for solving air preheater low temperature corrosion now, the utility model provides a power plant boiler feedwater and air heating system, it can effectively avoid air heater low temperature corrosion, and the guarantee lasts steady operation, can reduce equipment investment cost by a wide margin again, and the unit generating efficiency is not influenced.
The technical scheme is as follows: the utility model provides a power plant boiler feeds water and air heating system, its includes boiler, oxygen-eliminating device, steam turbine, its characterized in that, the end input condensate water of intaking of oxygen-eliminating device, play water end are through water-feeding pump and play water piping connection the economizer one end of boiler, boiler other end steam outlet connects the steam turbine, the oxygen-eliminating device all connects through steam conduit with the heating end of steam extraction heating air heater the steam extraction end of steam turbine, the air inlet end of steam extraction heating air heater connects the fan, gives vent to anger the end and connects the furnace of boiler.
Adopt the utility model discloses afterwards, air heater has been got rid of in the boiler, can effectively avoid air heater low-temperature corrosion, the guarantee lasts steady operation, the equipment investment expense has been reduced again, new extraction heating air heater equipment expense is compared with former high-pressure feed water heater, medium pressure is lower, the cost is only low not high, if with the scheme contrast that adopts cold ware of cigarette and external air heater, whole equipment investment expense can descend by a wide margin, utilize steam turbine extraction heating air, the heat of extraction obtains utilizing completely, the unit generating efficiency is not influenced.
Drawings
Fig. 1 is a schematic view of the system of the present invention.
Detailed Description
See figure 1 and show, a power plant boiler feeds water and air heating system, it includes boiler 1, deaerator 2, steam turbine 3, deaerator 2's the end input condensate that intakes, the economizer one end of water outlet end through water-feeding pump 4 and outlet pipe 5 connection boiler 1, steam turbine 3 is connected to the boiler other end, deaerator 2 and the heating end of steam extraction heating air heater 7 all connect steam turbine 3 through steam conduit 6, the air inlet end of steam extraction heating air heater 7 is connected fan 8, the furnace of boiler 1 is connected to the end of giving vent to anger.
Condensed water from the upstream is deoxidized by a deaerator 2, and then is boosted by a water feed pump 4 to enter a boiler 1 for heating to become steam, the steam then enters a steam turbine 3 for doing work, the steam turbine 3 extracts steam to enter an extraction steam heating air preheater 7 for heating boiler combustion air generated by a fan 8, and the heated air enters a hearth of the boiler 1 for mixed combustion with fuel.
The steam extraction of the steam turbine is utilized to heat air, the air temperature required by boiler combustion is achieved, and the temperature can be adjusted through the steam extraction amount. The original high-pressure feed water heater, the original smoke heating air preheater or the original feed water heating air preheater is cancelled, and the steam extraction heating air preheater is added. The boiler feed water temperature is about 104 ℃, the boiler feed water is not heated after passing through the deaerator, the boiler feed water directly enters the boiler economizer after being boosted by the feed water pump, and the flue gas can reach the qualified exhaust gas temperature after being subjected to heat exchange by the economizer.
Claims (1)
1. The utility model provides a power plant boiler feeds water and air heating system, its includes boiler, oxygen-eliminating device, steam turbine, its characterized in that, the end input condensate that intakes of oxygen-eliminating device, play water end pass through feed pump and go out water piping connection the economizer one end of boiler, boiler other end steam outlet connects the steam turbine, the oxygen-eliminating device all connects through steam conduit with the heating end of steam extraction heating air preheater the steam extraction end of steam turbine, the air inlet end of steam extraction heating air preheater connects the fan, gives vent to anger the end and connects the furnace of boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223152959.6U CN218626806U (en) | 2022-11-28 | 2022-11-28 | Water supply and air heating system for power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223152959.6U CN218626806U (en) | 2022-11-28 | 2022-11-28 | Water supply and air heating system for power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218626806U true CN218626806U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223152959.6U Active CN218626806U (en) | 2022-11-28 | 2022-11-28 | Water supply and air heating system for power station boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218626806U (en) |
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2022
- 2022-11-28 CN CN202223152959.6U patent/CN218626806U/en active Active
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