CN103759284A - Electrostatic precipitation technology with flue gas heat exchange system configured - Google Patents
Electrostatic precipitation technology with flue gas heat exchange system configured Download PDFInfo
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- CN103759284A CN103759284A CN201410057368.1A CN201410057368A CN103759284A CN 103759284 A CN103759284 A CN 103759284A CN 201410057368 A CN201410057368 A CN 201410057368A CN 103759284 A CN103759284 A CN 103759284A
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- flue gas
- heat exchange
- exchange system
- electrostatic precipitation
- heat exchanging
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Abstract
The invention relates to an electrostatic precipitation technology with a flue gas heat exchange system configured, and the electrostatic precipitation technology achieves not only emission reduction of contaminants, but also high efficiency and energy saving. The flue gas heat exchange system and an electrostatic dedusting device are sequentially arranged behind a boiler air pre-heater in the flue gas flowing direction, and the flue gas heat exchange system is provided with an adjusting valve and a frequency conversion booster pump. The efficiency of an electrostatic dust collector is improved, the emission concentration of flue gas and dust is reduced, the waste heat of flue gas is fully utilized, the energy saving is achieved, the running cost is low, adjustment, overhaul and operating maintenance are convenient, and the electrostatic precipitation technology is applicable to dust purification of coal-fired flue gas.
Description
Technical field
The present invention relates to a kind of electrostatic precipitator technology, relate in particular to a kind of pollution reduction, energy-efficient electrostatic precipitator technology that disposes smoke heat exchanging system of while both realized.
Background technology
At present, society and the public have become the real needs of life to the pursuit of environmental quality, and the world's most countries that comprises China is all constantly revising and improving pollutant emission standard, to realize continuable environmental development target.
Electrostatic precipitator has been put in most coal burning machine assembly of China, in actual moving process, on the one hand, uses coal and design coal and exists larger deviation; On the other hand, the exhaust gas temperature of boiler has again larger rising compared with design load, causes exhaust gas dust concentration of emission not reach the discharge standard of national increasingly stringent.
The present invention adopts heat exchange principle, by reducing electrostatic precipitator entrance flue gas temperature to low low-temperature condition, when improving electrostatic precipitator efficiency, reducing exhaust gas dust concentration of emission, makes full use of again fume afterheat, has reached energy-conservation object.
Summary of the invention
The electrostatic precipitator technology that the object of this invention is to provide a kind of energy-saving and emission-reduction.The present invention sets gradually smoke heat exchanging system and electrostatic precipitator after boiler air preheater along flue gas flow direction, smoke heat exchanging system is provided with control valve and frequency conversion booster.The present invention, when improving electrostatic precipitator efficiency, reducing exhaust gas dust concentration of emission, makes full use of again fume afterheat, has reached energy-conservation object, and operating cost is low, and adjusting, maintenance and operation maintenance are convenient, is applicable to the dust purification of coal-fired flue-gas.
For achieving the above object, boiler smoke enters after boiler air preheater, and the flue gas of approximately 150 ℃ of left and right of temperature enters smoke heat exchanging system of the present invention subsequently, and after heat exchange, flue-gas temperature is down to the low low-temperature condition of 100 ℃ of left and right.Flue gas is under low low-temperature condition, and flue gas volume flow reduces, and dust specific resistance increases, thereby has improved the efficiency of dust collection of electrostatic precipitator, has reduced exhaust gas dust concentration of emission.Meanwhile, the hot flue gas after steam turbine condensed water and boiler air preheater is through smoke heat exchanging system generation heat exchange, and the condensed water after heating imports steam turbine main condensate, takes full advantage of fume afterheat and improves condensate temperature, has reached energy-conservation object.
Smoke heat exchanging system of the present invention by boiler air preheater after hot flue gas and the steam turbine condensed water of approximately 150 ℃ of left and right realize heat exchange.Flue-gas temperature after heat exchange is down to the low low-temperature condition of 100 ℃ of left and right by 150 ℃ of left and right, enter electrostatic precipitator.The condensed water that after heat exchange, temperature is improved imports steam turbine main condensate.In the steam turbine condensed water inlet ductwork of smoke heat exchanging system, control valve and frequency conversion booster are set respectively, control valve is used for regulating condensed water inflow temperature, and frequency conversion booster is used for regulating condensed water flow of inlet water.
Compared with prior art, the present invention has following characteristics:
(1) owing to having adopted heat exchange principle, by reducing electrostatic precipitator entrance flue gas temperature to low low-temperature condition, flue gas volume flow reduces, dust specific resistance increases, when improving electrostatic precipitator efficiency, reducing exhaust gas dust concentration of emission, the steam turbine condensate temperature that raise, makes full use of fume afterheat, has reached energy-conservation object.
(2) in the steam turbine condensed water inlet ductwork of smoke heat exchanging system, control valve and frequency conversion booster are set respectively, inflow temperature and flow of inlet water are convenient to regulate.
(3) compact conformation of the present invention has the features such as adjusting, maintenance and operation maintenance convenience simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the process flow diagram of patent of the present invention.
In figure: 1. boiler air preheater, 2. smoke heat exchanging system, 3. electrostatic precipitator, 4. control valve, 5. frequency conversion booster.
The specific embodiment
In Fig. 1, along flue gas flow direction, after boiler air preheater, set gradually smoke heat exchanging system and electrostatic precipitator, in smoke heat exchanging system steam turbine condensed water inlet ductwork, be respectively arranged with control valve and frequency conversion booster.
When the present invention is in working order time, boiler smoke enters after boiler air preheater (1), and the flue gas of approximately 150 ℃ of left and right of temperature enters smoke heat exchanging system of the present invention (2) subsequently, and after heat exchange, flue-gas temperature is down to the low low-temperature condition of 100 ℃ of left and right.Flue gas is under low low-temperature condition, and flue gas volume flow reduces, and dust specific resistance increases, thereby has improved the efficiency of dust collection of electrostatic precipitator (3), has reduced exhaust gas dust concentration of emission.Meanwhile, there is heat exchange through smoke heat exchanging system (2) in the hot flue gas after steam turbine condensed water and boiler air preheater (1), and the condensed water after heating imports steam turbine main condensate, takes full advantage of fume afterheat and improves condensate temperature, has reached energy-conservation object.Smoke heat exchanging system of the present invention (2) is realized heat exchange by hot flue gas and the steam turbine condensed water of approximately 150 ℃ of left and right after boiler air preheater (1).Flue-gas temperature after heat exchange is down to the low low-temperature condition of 100 ℃ of left and right by 150 ℃ of left and right, enter electrostatic precipitator (3).The condensed water that after heat exchange, temperature is improved imports steam turbine main condensate.Control valve (4) and frequency conversion booster (5) are set respectively in the steam turbine condensed water inlet ductwork of smoke heat exchanging system (2), and control valve (4) is for regulating condensed water inflow temperature, and frequency conversion booster (5) is for regulating condensed water flow of inlet water.
Claims (2)
1. an electrostatic precipitator technology that configures smoke heat exchanging system, is comprised of smoke heat exchanging system and electrostatic precipitator etc., it is characterized in that: along flue gas flow direction, after boiler air preheater, set gradually smoke heat exchanging system and electrostatic precipitator.
2. a kind of electrostatic precipitator technology that configures smoke heat exchanging system according to claim 1, is characterized in that: smoke heat exchanging system is provided with control valve and frequency conversion booster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410057368.1A CN103759284A (en) | 2014-02-20 | 2014-02-20 | Electrostatic precipitation technology with flue gas heat exchange system configured |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410057368.1A CN103759284A (en) | 2014-02-20 | 2014-02-20 | Electrostatic precipitation technology with flue gas heat exchange system configured |
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| Publication Number | Publication Date |
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| CN103759284A true CN103759284A (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410057368.1A Pending CN103759284A (en) | 2014-02-20 | 2014-02-20 | Electrostatic precipitation technology with flue gas heat exchange system configured |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08187449A (en) * | 1995-01-06 | 1996-07-23 | Sumitomo Heavy Ind Ltd | Treatment of exhaust gas and apparatus therefor |
| CN101038137A (en) * | 2007-04-19 | 2007-09-19 | 上海发电设备成套设计研究院 | Automatic control system for wall temperature of boiler discharged smoke heat recovery heat exchanger |
| CN102425805A (en) * | 2011-11-22 | 2012-04-25 | 孙德义 | Air change and fresh air heating system of boiler house |
| CN202203971U (en) * | 2011-07-28 | 2012-04-25 | 中国电力工程顾问集团西南电力设计院 | Discharged smoke afterheat recycling and emission reduction comprehensive application system for coal-fired boiler in thermal power plant |
| CN103363536A (en) * | 2013-07-10 | 2013-10-23 | 浙江省电力设计院 | Low temperature electric precipitation system in fuel electric plant |
-
2014
- 2014-02-20 CN CN201410057368.1A patent/CN103759284A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08187449A (en) * | 1995-01-06 | 1996-07-23 | Sumitomo Heavy Ind Ltd | Treatment of exhaust gas and apparatus therefor |
| CN101038137A (en) * | 2007-04-19 | 2007-09-19 | 上海发电设备成套设计研究院 | Automatic control system for wall temperature of boiler discharged smoke heat recovery heat exchanger |
| CN202203971U (en) * | 2011-07-28 | 2012-04-25 | 中国电力工程顾问集团西南电力设计院 | Discharged smoke afterheat recycling and emission reduction comprehensive application system for coal-fired boiler in thermal power plant |
| CN102425805A (en) * | 2011-11-22 | 2012-04-25 | 孙德义 | Air change and fresh air heating system of boiler house |
| CN103363536A (en) * | 2013-07-10 | 2013-10-23 | 浙江省电力设计院 | Low temperature electric precipitation system in fuel electric plant |
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Application publication date: 20140430 |