CN102705861A - Air pre-heater system for fuel coal industrial boiler - Google Patents
Air pre-heater system for fuel coal industrial boiler Download PDFInfo
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- CN102705861A CN102705861A CN201210199480XA CN201210199480A CN102705861A CN 102705861 A CN102705861 A CN 102705861A CN 201210199480X A CN201210199480X A CN 201210199480XA CN 201210199480 A CN201210199480 A CN 201210199480A CN 102705861 A CN102705861 A CN 102705861A
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- side air
- air preheater
- pipeline
- water
- water tank
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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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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention relates to an air pre-heater system for a fuel coal industrial boiler, which comprises a smoke-side air pre-heater, an air-side air pre-heater, a heat medium water tank, a water circulating pump, a three-way adjusting valve, a water-discharging tank pipeline, a hot water pipeline, a cold water pipeline and a bypass pipeline, wherein the air-side air pre-heater is mounted at an outlet of an air blower of the industrial boiler; the air-side air pre-heater is connected with the heat medium water tank through the cold water pipeline; the heat medium water tank is connected with the smoke-side air pre-heater through the water-discharging tank pipeline; the water circulating pump is mounted on the water-discharging tank pipeline; the smoke-side air pre-heater is connected with an input end of the three-way adjusting valve through the hot water pipeline; two output ends of the three-way adjusting valve are respectively connected with the bypass pipeline and the air-side air pre-heater; and the bypass pipeline is connected with the hot water pipeline or the heat medium water tank. Compared with the prior art, the air pre-heater system for the fuel coal industrial boiler has the advantages of high safety, energy-saving property, environmental protection, and the like.
Description
Technical field
The present invention relates to the relevant power-saving technology of a kind of Industrial Boiler, especially relate to a kind of coal-burned industrial boiler air preheater system.
Background technology
For Industrial Boiler, flue gas loss q
2Be a maximum loss of boiler thermal output, wherein flue-gas temperature is too high is main cause.Since in the boiler in the acid dew point of flue gas and coal and water content, air themperature and humidity, excess air coefficient, the coal sulfur content and ash amount, flying dust several factors such as to compare relevant; So in boiler design; Consider the influence of acid dew point; For avoiding the back-end surfaces cold end corrosion of (comprising air preheater), the value of cigarette temperature is generally higher, and the waste of flue gas heat is so just arranged inevitably.Secondly; Boiler afterbody heating surface is that the wall temperature of air preheater, its heating surface is the mean value of flue-gas temperature and air themperature basically; Institute thinks and guarantees tube wall temperature greater than dew-point temperature, and the air design of exhaust gas temperature when the coldest also makes the allowance of cigarette Wen Youda.Heat pipe preheater also is the air preheater of using always, and its shortcoming is that exhanst gas outlet section tube wall temperature is passive, and is uncontrollable, and its value is the mean value of flue-gas temperature and air themperature basically, so the temperature that flue gas reduces is limited.
Summary of the invention
The object of the invention is exactly the coal-burned industrial boiler air preheater system that a kind of safe, economical environment-protective is provided in order to overcome the defective that above-mentioned prior art exists.
The object of the invention can be realized through following technical scheme:
A kind of coal-burned industrial boiler air preheater system; It is characterized in that; Comprise fume side air preheater, air side air preheater, heating agent water tank, water circulating pump, three-way control valve, water tank pipeline, hot water line, cold water pipeline and bypass line; Described fume side air preheater is installed in the flue of Industrial Boiler; Described air side air preheater is installed in the blower export place of Industrial Boiler, and described air side air preheater is connected with the heating agent water tank through the cold water pipeline, and described heating agent water tank is connected with the fume side air preheater through the water tank pipeline; Described water circulating pump is installed on the water tank pipeline; Described fume side air preheater is connected with the input of three-way control valve through the hot water line, and two outputs of described three-way control valve are connected with bypass line, air side air preheater respectively, and described bypass line is connected with cold water pipeline or heating agent water tank.
Described fume side air preheater, air side air preheater all adopt tubular type flue gas water-to-water heat exchanger.
Described heating agent water tank is provided with the temperature sensor that is used to control three-way control valve.
Compared with prior art, the present invention has the following advantages:
1, pass through the flue gas heating heat medium water, the heat medium water of heating adds hot-air again, thereby reaches purpose of energy saving;
2, can realize regulating automatically according to working conditions change; The inflow temperature of control fume side air preheater is higher than the acid dew point value, so just can effectively avoid taking place the cold end corrosion phenomenon, guarantees device security; Simultaneously reclaim fume afterheat again as wide as possible, reach fuel-saving purpose.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
As shown in Figure 1; A kind of coal-burned industrial boiler air preheater system; Comprise fume side air preheater 1, air side air preheater 2, heating agent water tank 3, water circulating pump 4, three-way control valve 5, water tank pipeline 6, hot water line 7, cold water pipeline 8 and bypass line 9; Described fume side air preheater 1 is installed in the flue of Industrial Boiler; Described air side air preheater 2 is installed in the blower export place of Industrial Boiler, and described air side air preheater 2 is connected with heating agent water tank 3 through cold water pipeline 8, and described heating agent water tank 3 is connected with fume side air preheater 1 through water tank pipeline 6; Described water circulating pump 4 is installed on the water tank pipeline 6; Described fume side air preheater 1 is connected with the input of three-way control valve 5 through hot water line 7, and two outputs of described three-way control valve 5 are connected with bypass line 9, air side air preheater 2 respectively, and described bypass line 9 is connected with cold water pipeline 8 or heating agent water tank 3.
Operation principle is following: according to the coal-burned industrial boiler operation characteristics; At boiler back end ductwork fume side air preheater 1 is installed; Simultaneously install air side air preheater 2 additional at blower export, between fume side air preheater 1 and air side air preheater 2, install heating agent water tank 3, water circulating pump 4 and three-way control valve 5 additional, heat medium water absorbs heat at fume side air preheater 1 earlier; Get into air side air preheater 2 again heat is passed to air; Ground heat medium water entering heating agent water tank 3 circulates next time after the heat release, and the inlet water temperature of three-way control valve 5 control fume side air preheaters 1 is avoided cold end corrosion simultaneously.So just reach and absorb fume afterheat under the prerequisite of guaranteeing device security as wide as possible.
Fume side air preheater 1 adopts heat exchange element to have the tubular type flue gas water-to-water heat exchanger of auxiliary heating surface (finned tube, aciculiform pipe, gilled tube) with air side air preheater 2; Heating agent water tank 3 is a normal atmospheric formula water tank; Water circulating pump 4 is a heat-exchanger pump, and three-way control valve 5 is pneumatic or electronic one-in-and-two-out formula three-way control valve.System intakes heating agent water tank 3 to ordinary water level on ON cycle water pump 4 before starting.Behind the boiler startup; Water in the heating agent water tank 3 is squeezed into fume side air preheater 1 by water circulating pump 4 through water tank pipeline 6; The heat of boiler smoke is passed to heat medium water through fume side air preheater 1, gets into air side air preheater 2 through hot water line 7, and heat is passed to air; The heat medium water that has changed heat flows back to heating agent water tank 3 through cold water pipeline 8, accomplishes once circulation.On hot water line 7, install three-way control valve 5 additional, it receives the control of temperature sensor 10, regulates part hot water and gets into cold water pipeline 8 (or directly getting into heating agent water tank 3) through bypass line 9.
In whole system, the YE on the temperature control three-way control valve 5 that temperature sensor 10 records, the coolant-temperature gage of using on the water tank pipeline is higher than acid dew-point temperature.
Claims (3)
1. coal-burned industrial boiler air preheater system; It is characterized in that; Comprise fume side air preheater (1), air side air preheater (2), heating agent water tank (3), water circulating pump (4), three-way control valve (5), water tank pipeline (6), hot water line (7), cold water pipeline (8) and bypass line (9); Described fume side air preheater (1) is installed in the flue of Industrial Boiler; Described air side air preheater (2) is installed in the blower export place of Industrial Boiler; Described air side air preheater (2) is connected with heating agent water tank (3) through cold water pipeline (8); Described heating agent water tank (3) is connected with fume side air preheater (1) through water tank pipeline (6), and described water circulating pump (4) is installed on the water tank pipeline (6), and described fume side air preheater (1) is connected with the input of three-way control valve (5) through hot water line (7); Two outputs of described three-way control valve (5) are connected with bypass line (9), air side air preheater (2) respectively, and described bypass line (9) is connected with cold water pipeline (8) or heating agent water tank (3).
2. a kind of coal-burned industrial boiler air preheater according to claim 1 system is characterized in that described fume side air preheater (1), air side air preheater (2) all adopt tubular type flue gas water-to-water heat exchanger.
3. a kind of coal-burned industrial boiler air preheater according to claim 1 system is characterized in that described heating agent water tank (3) is provided with the temperature sensor (10) that is used to control three-way control valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210199480.XA CN102705861B (en) | 2012-06-15 | 2012-06-15 | Air pre-heater system for fuel coal industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210199480.XA CN102705861B (en) | 2012-06-15 | 2012-06-15 | Air pre-heater system for fuel coal industrial boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102705861A true CN102705861A (en) | 2012-10-03 |
| CN102705861B CN102705861B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210199480.XA Expired - Fee Related CN102705861B (en) | 2012-06-15 | 2012-06-15 | Air pre-heater system for fuel coal industrial boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968410A (en) * | 2014-05-30 | 2014-08-06 | 上海汇闵能源科技有限公司 | System for recovering waste heat of low temperature smoke and flashing steam |
| CN104807035A (en) * | 2015-04-22 | 2015-07-29 | 郝江平 | Air preheating and flue gas waste heat utilizing system and method |
| CN105371267A (en) * | 2015-12-16 | 2016-03-02 | 广州粤能电力科技开发有限公司 | Double-reheat steam turbine heat regenerative energy utilizing system for primary air and secondary air of heating boiler |
| CN105423289A (en) * | 2015-12-31 | 2016-03-23 | 重庆川然节能技术有限公司 | Condensation-resistant system and method of flue gas outer circulation combustion equipment |
| CN106855249A (en) * | 2017-03-10 | 2017-06-16 | 孙立宇 | A kind of residual neat recovering system for preventing dewpoint corrosion |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4310746A (en) * | 1976-07-28 | 1982-01-12 | Elkern Kenneth E | Electric fluid heating apparatus |
| CN2417388Y (en) * | 2000-05-12 | 2001-01-31 | 上海华力燃烧设备有限公司 | Non low temp. corrosion type air preheater |
| CN201680401U (en) * | 2010-04-23 | 2010-12-22 | 深圳中节能环保有限公司 | Forced circulation heat exchanging system |
| CN102052210A (en) * | 2010-12-30 | 2011-05-11 | 江苏兆胜空调有限公司 | Method for cooling low sulfur oil |
| CN102155766A (en) * | 2011-03-30 | 2011-08-17 | 浙江大学 | Constant-temperature and constant-humidity air conditioning system adopting variable-flow variable-water-temperature surface cooler |
| CN202048561U (en) * | 2011-04-15 | 2011-11-23 | 蠡县富利革基布有限公司 | Smoke residual heat utilization device for boiler |
| CN102445027A (en) * | 2011-12-31 | 2012-05-09 | 广东欧科空调制冷有限公司 | Double-water tank hot water system of heat-recovery air-cooling heat pump unit |
-
2012
- 2012-06-15 CN CN201210199480.XA patent/CN102705861B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4310746A (en) * | 1976-07-28 | 1982-01-12 | Elkern Kenneth E | Electric fluid heating apparatus |
| CN2417388Y (en) * | 2000-05-12 | 2001-01-31 | 上海华力燃烧设备有限公司 | Non low temp. corrosion type air preheater |
| CN201680401U (en) * | 2010-04-23 | 2010-12-22 | 深圳中节能环保有限公司 | Forced circulation heat exchanging system |
| CN102052210A (en) * | 2010-12-30 | 2011-05-11 | 江苏兆胜空调有限公司 | Method for cooling low sulfur oil |
| CN102155766A (en) * | 2011-03-30 | 2011-08-17 | 浙江大学 | Constant-temperature and constant-humidity air conditioning system adopting variable-flow variable-water-temperature surface cooler |
| CN202048561U (en) * | 2011-04-15 | 2011-11-23 | 蠡县富利革基布有限公司 | Smoke residual heat utilization device for boiler |
| CN102445027A (en) * | 2011-12-31 | 2012-05-09 | 广东欧科空调制冷有限公司 | Double-water tank hot water system of heat-recovery air-cooling heat pump unit |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968410A (en) * | 2014-05-30 | 2014-08-06 | 上海汇闵能源科技有限公司 | System for recovering waste heat of low temperature smoke and flashing steam |
| CN103968410B (en) * | 2014-05-30 | 2017-01-04 | 上海汇闵能源科技有限公司 | A kind of low-temperature flue gas and the residual neat recovering system of flash-off steam |
| CN104807035A (en) * | 2015-04-22 | 2015-07-29 | 郝江平 | Air preheating and flue gas waste heat utilizing system and method |
| CN104807035B (en) * | 2015-04-22 | 2017-10-03 | 郝江平 | A kind of air preheat and smoke waste heat utilization system and method |
| CN105371267A (en) * | 2015-12-16 | 2016-03-02 | 广州粤能电力科技开发有限公司 | Double-reheat steam turbine heat regenerative energy utilizing system for primary air and secondary air of heating boiler |
| CN105371267B (en) * | 2015-12-16 | 2018-07-03 | 广州粤能电力科技开发有限公司 | The Double reheat steam turbine backheat energy utility system of heating boiler primary and secondary air |
| CN105423289A (en) * | 2015-12-31 | 2016-03-23 | 重庆川然节能技术有限公司 | Condensation-resistant system and method of flue gas outer circulation combustion equipment |
| CN105423289B (en) * | 2015-12-31 | 2018-05-18 | 重庆川然节能技术有限公司 | A kind of condensation prevention system and method for flue gas outer circulation combustion apparatus |
| CN106855249A (en) * | 2017-03-10 | 2017-06-16 | 孙立宇 | A kind of residual neat recovering system for preventing dewpoint corrosion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102705861B (en) | 2015-07-08 |
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Granted publication date: 20150708 Termination date: 20180615 |
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