CN105627289B - Low-level (stack-gas) economizer combines steam air heater cyclic utilization system - Google Patents
Low-level (stack-gas) economizer combines steam air heater cyclic utilization system Download PDFInfo
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- CN105627289B CN105627289B CN201610150598.1A CN201610150598A CN105627289B CN 105627289 B CN105627289 B CN 105627289B CN 201610150598 A CN201610150598 A CN 201610150598A CN 105627289 B CN105627289 B CN 105627289B
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- low
- stack
- economizer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/36—Water and air preheating systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
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Abstract
The invention belongs to power plant stack gas heat recovery technology fields, it is simple that purpose is to provide a kind of structure, it is energy saving, reduce the low-level (stack-gas) economizer joint steam air heater cyclic utilization system of cost, including low adding system, low-level (stack-gas) economizer, steam air heater, low adding system is connected to through inlet pipeline with the first water inlet of low-level (stack-gas) economizer, first water outlet of low-level (stack-gas) economizer is connected to through water return pipeline with low adding system, first water inlet of low-level (stack-gas) economizer is installed by the first solenoid valve, second water outlet of low-level (stack-gas) economizer is connect through the first pipeline with booster pump, the water outlet of booster pump is connected to through the second pipeline with steam air heater, the water outlet of steam air heater is connected to through third pipeline with the second water inlet of low-level (stack-gas) economizer, second water inlet of low-level (stack-gas) economizer is installed by the 4th solenoid valve, inlet pipeline is through water pipe and third pipeline connection, it connects on water pipe Water supply solenoid valve.
Description
Technical field
The invention belongs to power plant stack gas heat recovery technology fields, combine warm wind more particularly to a kind of low-level (stack-gas) economizer
Device cyclic utilization system.
Background technique
For generation current plant smoke residual heat recovery system there are two types of form, a kind of no economizer and steam air heater cause smoke evacuation temperature
Degree is high, and subsequent deduster efficiency of dust collection is low, causes containing a large amount of dust in smoke evacuation, due to also containing noxious material in dust
Deng being directly discharged into atmosphere and will cause environmental pollution.CN202675725U discloses a kind of smoke waste heat utilization system, including changes
Hot device, cooling tower, lithium bromide refrigerator, high-temp waste gas enter in heat exchanger, and tap water and exhaust gas heat exchange heating rear portion are used
In production and living, a part is used for lithium bromide refrigerating mechanism cold, but is not provided with steam air heater, causes air preheater low-temperature corrosion.Separately
A kind of to use common economizer, system complex, the hydrophobic trench that drains into can not recycle, or by other reducing-and-cooling plants by water temperature
It is down to recyclable state recycling, at high cost, heat waste is serious.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of structures, and low temperature that is simple, energy saving, reducing cost saves coal
Device combines steam air heater cyclic utilization system.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of low-level (stack-gas) economizer joint steam air heater cyclic utilization system, including low adding system, low-level (stack-gas) economizer, steam air heater,
Low adding system is connected to through inlet pipeline with the first water inlet of low-level (stack-gas) economizer, and the first water outlet of low-level (stack-gas) economizer is through return pipe
Road is connected to low adding system, and the first solenoid valve, the second water outlet of low-level (stack-gas) economizer are installed in the first water inlet of low-level (stack-gas) economizer
Mouth is connect through the first pipeline with booster pump, and the water outlet of booster pump is connected to through the second pipeline with steam air heater, the water outlet of steam air heater
It is connected to through third pipeline with the second water inlet of low-level (stack-gas) economizer, the 4th electromagnetism is installed in the second water inlet of low-level (stack-gas) economizer
Valve, inlet pipeline is through water pipe and third pipeline connection, serial make-up water solenoid valve on water pipe.
Low-level (stack-gas) economizer joint steam air heater cyclic utilization system of the present invention further includes further controller, the water inlet
First temperature sensor and first pressure sensor are installed on pipeline, second temperature sensor and the second pressure are installed on water return pipeline
Force snesor installs third temperature sensor and third pressure sensor on the first pipeline, installs the 4th temperature on the second pipeline
The outlet end of sensor and the 4th pressure sensor, steam air heater is installed by the 5th temperature sensor and the 5th pressure sensor, third
Series connection second is electric on the 6th temperature sensor of the installed in front of water pipe and the 6th pressure sensor, the second pipeline on pipeline
Magnet valve, the first to the 6th temperature sensor, the first to the 6th pressure sensor signal output end respectively with the signal of controller
Receiving end connection, the signal output end of controller respectively with booster pump, the first, second, the 4th solenoid valve, water supply solenoid valve letter
The connection of number receiving end.
Low-level (stack-gas) economizer of the present invention combines steam air heater cyclic utilization system, further, the import of the second solenoid valve
The bypass duct in parallel between the outlet end of steam air heater is held, third solenoid valve of connecting on bypass duct, the signal output of controller
End is connect with the signal receiving end of third solenoid valve.
Low-level (stack-gas) economizer of the present invention combines steam air heater cyclic utilization system, further, the booster pump into and out of water end (W.E.)
Spare booster pump in parallel.
Low-level (stack-gas) economizer joint steam air heater cyclic utilization system of the present invention is joined using circulating chilled water by low-level (stack-gas) economizer
It closes steam air heater to recycle, to achieve the purpose that reduce exhaust gas temperature, while the cold wind of air preheater is heated, prevent its low
Temperature corrosion, the configuration of the present invention is simple is energy saving, reduces costs, and is entered by water supply solenoid valve, the 4th electromagnetism valve regulation low
The water of warm economizer achievees the purpose that control outlet smoke temperature.
Low-level (stack-gas) economizer joint steam air heater cyclic utilization system of the invention is described further with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that low-level (stack-gas) economizer of the present invention combines steam air heater cyclic utilization system.
Specific embodiment
As shown in Figure 1, low-level (stack-gas) economizer joint steam air heater cyclic utilization system of the present invention includes low adding system 1, low temperature province
Coal device 2, steam air heater 3, controller, low adding system 1 is connected to through inlet pipeline 11 with the first water inlet 21 of low-level (stack-gas) economizer 2, low
First water outlet 22 of warm economizer 2 is connected to through water return pipeline 23 with low adding system 1.First water inlet 21 of low-level (stack-gas) economizer 2
The first solenoid valve 24 is installed at place, installs the first temperature sensor 12 and first pressure sensor 13, return pipe on inlet pipeline 11
Second temperature sensor 25 and second pressure sensor 26 are installed on road 23.
Second water outlet 27 of low-level (stack-gas) economizer 2 is connect through the first pipeline 28 with booster pump 4, the water outlet warp of booster pump 4
Second pipeline 41 is connected to steam air heater 3, second water inlet of the water outlet of steam air heater 3 through third pipeline 31 Yu low-level (stack-gas) economizer 2
29 connections.
Third temperature sensor 14 and third pressure sensor 15 be installed on first pipeline 28, booster pump 4 into and out of water end (W.E.)
Spare booster pump 42 in parallel installs the 4th temperature sensor 43 and the 4th pressure sensor 44, the second pipeline on second pipeline 41
Series connection second solenoid valve 45 on 41, bypass duct 46 in parallel between the input end and the outlet end of steam air heater 3 of second solenoid valve 45,
Series connection third solenoid valve 47 on bypass duct 46, the 5th temperature sensor 32 is installed in the outlet end of steam air heater 3 and the 5th pressure passes
Sensor 33 installs the 4th solenoid valve 34 at second water inlet 29 of low-level (stack-gas) economizer 2.Inlet pipeline 11 is through water pipe 35 and
Three pipelines 31 are connected to, serial make-up water solenoid valve 36 on water pipe 35.In the installed in front of water pipe 35 on third pipeline 31
6th temperature sensor 37 and the 6th pressure sensor 38.
First to the 6th temperature sensor, the first to the 6th pressure sensor signal output end respectively with the letter of controller
Number receiving end connection, the signal output end of controller respectively with booster pump 4, first to fourth solenoid valve, water supply solenoid valve 36
Signal receiving end connection.
The course of work of low-level (stack-gas) economizer joint steam air heater cyclic utilization system of the present invention are as follows:
Cold water is provided by low adding system 1, cold water a part heats water, hot water by low-level (stack-gas) economizer 2, using fume afterheat
It is spare to be back to low adding system 1, another part enters low-level (stack-gas) economizer 2, and the hot water of heating is connected to steam air heater 3, and heating passes through
Recirculation of cold water to the low-level (stack-gas) economizer 2 of the cold wind of air preheater, outlet recycles, and the mesh of reduction exhaust gas temperature is reached with this
, air preheater entrance wind-warm syndrome is improved, hot water circuit is utilized, to greatest extent uses fume afterheat, and passes through control
Device implementing monitoring temperature, makes system reach the temperature of requirement.
Low-level (stack-gas) economizer joint steam air heater cyclic utilization system of the present invention compared with prior art, has below beneficial to effect
Fruit:
The present invention uses circulating chilled water, combines steam air heater by low-level (stack-gas) economizer and recycles, and reduces smoke evacuation temperature to reach
The purpose of degree, while the cold wind of air preheater is heated, its low-temperature corrosion is prevented, the configuration of the present invention is simple is energy saving, drop
Low cost, the water of low-level (stack-gas) economizer is entered by water supply solenoid valve, the 4th electromagnetism valve regulation, reaches control outlet smoke temperature
Purpose, system designs multi-step temperature, pressure sensor carries out the monitoring of temperature and pressure, guarantees system stable operation, whole to make
A system has enough power cycles, and system design has booster pump and spare booster pump.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (2)
1. a kind of low-level (stack-gas) economizer combines steam air heater cyclic utilization system, it is characterised in that: save coal including low adding system, low temperature
Device, steam air heater, low adding system are connected to through inlet pipeline with the first water inlet of low-level (stack-gas) economizer, the first water outlet of low-level (stack-gas) economizer
Mouth is connected to through water return pipeline with low adding system, and the first solenoid valve, low-level (stack-gas) economizer are installed in the first water inlet of low-level (stack-gas) economizer
The second water outlet connect through the first pipeline with booster pump, the water outlet of booster pump is connected to through the second pipeline with steam air heater, warm wind
The water outlet of device is connected to through third pipeline with the second water inlet of low-level (stack-gas) economizer, the second water inlet installation of low-level (stack-gas) economizer
4th solenoid valve, inlet pipeline is through water pipe and third pipeline connection, serial make-up water solenoid valve on water pipe；
Further include controller, the first temperature sensor and first pressure sensor be installed on the inlet pipeline, on water return pipeline
Second temperature sensor and second pressure sensor are installed, third temperature sensor and third pressure sensing are installed on the first pipeline
Device, the 4th temperature sensor and the 4th pressure sensor are installed on the second pipeline, and the outlet end of steam air heater is installed the 5th temperature and passed
Sensor and the 5th pressure sensor are passed in the 6th temperature sensor of installed in front of water pipe and the 6th pressure on third pipeline
Sensor, second solenoid valve of connecting on the second pipeline, the signal of the first to the 6th temperature sensor, the first to the 6th pressure sensor
Output end is connect with the signal receiving end of controller respectively, the signal output end of controller respectively with booster pump, first, second,
The signal receiving end connection of 4th solenoid valve, water supply solenoid valve；
Bypass duct in parallel between the input end of the second solenoid valve and the outlet end of steam air heater, third of connecting on bypass duct
The signal output end of solenoid valve, controller is connect with the signal receiving end of third solenoid valve.
2. low-level (stack-gas) economizer according to claim 1 combines steam air heater cyclic utilization system, it is characterised in that: the pressurization
Pump into and out of water end (W.E.) spare booster pump in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150598.1A CN105627289B (en) | 2016-03-16 | 2016-03-16 | Low-level (stack-gas) economizer combines steam air heater cyclic utilization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610150598.1A CN105627289B (en) | 2016-03-16 | 2016-03-16 | Low-level (stack-gas) economizer combines steam air heater cyclic utilization system |
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| CN105627289A CN105627289A (en) | 2016-06-01 |
| CN105627289B true CN105627289B (en) | 2018-12-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504477A (en) * | 2016-06-14 | 2017-12-22 | 天津华赛尔传热设备有限公司 | A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer |
| CN107023819A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Low low-level (stack-gas) economizer Two-way Cycle heating system and Two-way Cycle heating means |
| CN108800598B (en) * | 2018-06-22 | 2020-08-18 | 中国电建集团都江电力设备有限公司 | Flue gas waste heat recycling combined air heater double-bypass wide-load adjusting method |
| CN109442379A (en) * | 2018-10-09 | 2019-03-08 | 中国神华能源股份有限公司 | Flue gas waste heat recovery system and boiler system |
| CN114526495A (en) * | 2022-02-25 | 2022-05-24 | 西安西热锅炉环保工程有限公司 | Variable heat source air heater system and control method thereof |
| CN114459016A (en) * | 2022-02-25 | 2022-05-10 | 西安西热锅炉环保工程有限公司 | Low-temperature economizer combined air heater all-condition adjusting system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205424887U (en) * | 2016-03-16 | 2016-08-03 | 天津爱尔普科技发展有限公司 | Fan heater cyclic utilization system is united to low -level (stack -gas) economizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5223526B2 (en) * | 2008-07-31 | 2013-06-26 | 三浦工業株式会社 | Boiler water supply system |
| CN202109463U (en) * | 2011-06-20 | 2012-01-11 | 中国华能集团清洁能源技术研究院有限公司 | Combined smoke waste heat comprehensive utilization system |
| CN204574092U (en) * | 2014-12-05 | 2015-08-19 | 浙江省电力设计院 | Boiler tail flue gas waste heat complicated utilization system |
| CN105351915B (en) * | 2015-11-10 | 2018-03-27 | 上海羲蓝节能环保科技有限公司 | A kind of bicirculating boiler smoke discharging residual heat recovery is heated into stove wind devices and method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205424887U (en) * | 2016-03-16 | 2016-08-03 | 天津爱尔普科技发展有限公司 | Fan heater cyclic utilization system is united to low -level (stack -gas) economizer |
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Granted publication date: 20181214 Termination date: 20190316 |