CN111271718A - A device and method for blowing soot by using flue gas in a low-low temperature economizer - Google Patents

A device and method for blowing soot by using flue gas in a low-low temperature economizer Download PDF

Info

Publication number
CN111271718A
CN111271718A CN202010184485.XA CN202010184485A CN111271718A CN 111271718 A CN111271718 A CN 111271718A CN 202010184485 A CN202010184485 A CN 202010184485A CN 111271718 A CN111271718 A CN 111271718A
Authority
CN
China
Prior art keywords
low
flue
temperature economizer
low temperature
electrostatic precipitator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010184485.XA
Other languages
Chinese (zh)
Inventor
王伟
刘惠勇
赵江翔
张吉祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Londian Hongtai Environmental Technology Co ltd
Original Assignee
Beijing Londian Hongtai Environmental Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Londian Hongtai Environmental Technology Co ltd filed Critical Beijing Londian Hongtai Environmental Technology Co ltd
Priority to CN202010184485.XA priority Critical patent/CN111271718A/en
Publication of CN111271718A publication Critical patent/CN111271718A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02Cleaning furnace tubes; Cleaning flues or chimneys
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/006Layout of treatment plant

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrostatic Separation (AREA)

Abstract

The invention relates to a device and a method for blowing soot by using flue gas of a low-temperature economizer, which mainly comprise the low-temperature economizer (or the low-temperature economizer), a low-temperature economizer inlet flue, a low-temperature economizer outlet flue, an electrostatic precipitator outlet flue, a soot blowing fan inlet baffle door, a soot blowing fan outlet baffle door, an air distribution pipe and a fluidization plate. The invention relates to the field of low-temperature electric dust removal and flue gas waste heat recovery of boilers in thermal power plants, and is suitable for the application field of arranging low-temperature economizers and low-temperature economizers in a horizontal flue in a high-ash environment. The invention has low operation cost and convenient maintenance and repair.

Description

一种用于低低温省煤器利用烟气吹灰的装置和方法A device and method for blowing soot by using flue gas in a low-low temperature economizer

技术领域technical field

本发明涉及火电厂锅炉低低温电除尘及烟气余热回收领域,适用于高灰环境下水平烟道内布置低低温省煤器、低温省煤器的应用领域。The invention relates to the field of low-low temperature electrostatic precipitator and flue gas waste heat recovery of boilers in thermal power plants, and is suitable for the application field of arranging low-low temperature economizers and low-temperature economizers in a horizontal flue in a high-ash environment.

背景技术Background technique

低低温电除尘技术是目前国内应用较多的一种新型除尘技术,在一定条件下可以降低比电阻,提高静电除尘器除尘效率。低低温省煤器通常采用水媒式换热,将金属换热管布置在静电除尘器前的烟道内,利用水与烟气进行间接换热,降低烟气温度,降低粉尘比电阻,从而提高静电除尘器的除尘效率,加热后的水可以回到锅炉给水或热网水进行余热回收。Low and low temperature electrostatic precipitator technology is a new type of dust removal technology that is widely used in China. Under certain conditions, it can reduce the specific resistance and improve the dust removal efficiency of electrostatic precipitators. The low and low temperature economizer usually adopts water-mediated heat exchange, and the metal heat exchange tube is arranged in the flue in front of the electrostatic precipitator, and the indirect heat exchange between water and flue gas is used to reduce the temperature of flue gas and the specific resistance of dust, thereby increasing the The dust removal efficiency of the electrostatic precipitator, the heated water can be returned to the boiler feed water or hot network water for waste heat recovery.

由于低低温省煤器通常布置在静电除尘器的水平烟道内,不可避免的出现积灰现场,目前的低低温省煤器通常采用声波吹灰器或固定旋转式蒸汽吹灰器,但这两种方式对清除低低温省煤器管束上积灰具有一定的作用,但对于在低低温省煤器底部积灰无法进行有效清除。Since the low and low temperature economizer is usually arranged in the horizontal flue of the electrostatic precipitator, the ash accumulation site is inevitable. The current low and low temperature economizer usually adopts a sonic sootblower or a fixed rotary steam sootblower, but these two This method has a certain effect on removing the ash deposits on the tube bundles of the low-low temperature economizer, but cannot effectively remove the ash deposits at the bottom of the low-low temperature economizer.

本发明拟开发一种针对低低温省煤器底部积灰进行清灰的方法。The present invention intends to develop a method for cleaning the ash deposited at the bottom of the low and low temperature economizer.

发明内容SUMMARY OF THE INVENTION

为使低低温省煤器底部积灰能有效清除。本发明的技术方案以如下方式实现:In order to effectively remove the ash deposits at the bottom of the low and low temperature economizer. The technical scheme of the present invention is realized in the following manner:

一种用于低低温省煤器利用烟气吹灰的装置和方法,其特征在于,它包括低低温省煤器(或低温省煤器)、低低温省煤器进口烟道、低低温省煤器出口烟道、静电除尘器、静电除尘器出口烟道、吹灰烟道、吹灰风机、吹灰风机进口挡板门、吹灰风机出口挡板门、布风管、流化板。A device and method for low-low temperature economizer using flue gas soot blowing, characterized in that it comprises a low-low temperature economizer (or low-temperature economizer), a low-low temperature economizer inlet flue, a low-low temperature economizer, and a low-low temperature economizer. Coaler outlet flue, electrostatic precipitator, electrostatic precipitator outlet flue, soot blowing flue, soot blower, soot blower inlet baffle door, soot blower outlet baffle door, air distribution pipe, fluidization plate.

当低低温省煤器投入运行时,从静电除尘器出口烟道内抽取经除尘后的洁净烟气,经风机加压后与低低温省煤器底部壳体的布风管连接,将空气通入流化板,将底部积灰流化后由烟气带走。When the low and low temperature economizer is put into operation, the clean flue gas after dedusting is extracted from the outlet flue of the electrostatic precipitator, and after being pressurized by the fan, it is connected to the air distribution pipe of the bottom shell of the low and low temperature economizer, and the air is passed into the flow The ash at the bottom is fluidized and taken away by the flue gas.

所述通过低低温省煤器出口烟道与静电除尘器连接;所述静电除尘器出口烟道布置在静电除尘器出口;所述吹灰烟道连接低低温省煤器底部壳体和静电除尘器出口烟道;所述吹灰风机进口挡板门、吹灰风机、风机出口挡板门、布风管、流化板依次布置在吹灰烟道上;所述流化板为半球形结构,均匀布置在低低温省煤器壳体底部;所述布风管水平接入流化板。The outlet flue of the low and low temperature economizer is connected to the electrostatic precipitator; the outlet flue of the electrostatic precipitator is arranged at the outlet of the electrostatic precipitator; the soot blowing flue is connected to the bottom shell of the low and low temperature economizer and the electrostatic precipitator The soot blower outlet flue; the soot blower inlet baffle door, the soot blower, the fan outlet baffle door, the air distribution pipe, and the fluidization plate are sequentially arranged on the soot blower flue; the fluidization plate is a hemispherical structure, It is evenly arranged at the bottom of the low and low temperature economizer shell; the air distribution pipe is horizontally connected to the fluidization plate.

所述低低温省煤器(低温省煤器)换热管采用光管、螺旋翅片、H型翅片或双H型翅片型式,换热管材质采用20钢、ND钢、不锈钢管等。The low and low temperature economizer (low temperature economizer) heat exchange tube adopts the type of plain tube, spiral fin, H-shaped fin or double H-shaped fin, and the heat exchange tube is made of 20 steel, ND steel, stainless steel tube, etc. .

下面结合附图和具体实施方式对发明做进一步说明。The invention will be further described below with reference to the accompanying drawings and specific embodiments.

附图说明Description of drawings

下面结合附图和具体实施方式对本发明做进一步说明。The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

图1是本发明专利的工艺流程示意图。Fig. 1 is the process flow schematic diagram of the patent of the present invention.

图中:1. 低低温省煤器、2. 低低温省煤器进口烟道、3. 低低温省煤器出口烟道、4. 静电除尘器、5.静电除尘器出口烟道、6. 吹灰烟道、7. 吹灰风机、8. 吹灰风机进口挡板门、9. 吹灰风机出口挡板门、10.布风管、11.流化板。In the picture: 1. Low and low temperature economizer, 2. Low and low temperature economizer inlet flue, 3. Low and low temperature economizer outlet flue, 4. Electrostatic precipitator, 5. Electrostatic precipitator outlet flue, 6. Soot blowing flue, 7. Soot blower, 8. Soot blower inlet baffle door, 9. Soot blower outlet baffle door, 10. Air distribution duct, 11. Fluidization plate.

具体实施方式Detailed ways

参看图1,一种用于低低温省煤器利用烟气吹灰的装置和方法,其特征在于,它包括低低温省煤器(或低温省煤器)(1)、低低温省煤器进口烟道(2)、低低温省煤器出口烟道(3)、静电除尘器(4)、静电除尘器出口烟道(5)、吹灰烟道(6)、吹灰风机(7)、吹灰风机进口挡板门(8)、吹灰风机出口挡板门(9)、布风管(10)、流化板(11)。1, a device and method for low-low temperature economizer utilizing flue gas soot blowing is characterized in that it comprises a low-low temperature economizer (or low-temperature economizer) (1), a low-low temperature economizer Inlet flue (2), low and low temperature economizer outlet flue (3), electrostatic precipitator (4), electrostatic precipitator outlet flue (5), soot blowing flue (6), soot blower (7) , soot blower inlet baffle door (8), soot blower outlet baffle door (9), air distribution pipe (10), fluidization plate (11).

所述低低温省煤器出口烟道(3)与静电除尘器(4)连接;所述静电除尘器出口烟道(5)布置在静电除尘器(4)出口;所述吹灰烟道(6)连接低低温省煤器(1)底部壳体和静电除尘器出口烟道(5);所述吹灰风机进口挡板门(8)、吹灰风机(7)、风机出口挡板门(9)、布风管(10)、流化板(11)依次布置在吹灰烟道(6)上;所述流化板(11)为弧形结构,均匀布置在低低温省煤器(1)壳体底部;所述布风管(10)水平接入流化板(11)。The outlet flue (3) of the low-low temperature economizer is connected with the electrostatic precipitator (4); the outlet flue (5) of the electrostatic precipitator is arranged at the outlet of the electrostatic precipitator (4); the soot blowing flue ( 6) Connect the bottom shell of the low and low temperature economizer (1) and the outlet flue of the electrostatic precipitator (5); the inlet baffle door (8), the soot blower (7), and the fan outlet baffle door of the soot blower (9) The air distribution pipe (10) and the fluidizing plate (11) are arranged on the soot blowing flue (6) in sequence; the fluidizing plate (11) is of an arc structure and is evenly arranged on the low-low temperature economizer (1) The bottom of the casing; the air distribution pipe (10) is horizontally connected to the fluidization plate (11).

图1所述系统中,静电除尘器(4)正常运行时,无论低低温省煤器(1)是否处于投运状态,抽取静电除尘器出口烟道(5)中已除尘后的烟气进入吹灰烟道(6),经吹灰风机(7)加压后,将烟气通过布风管(10)均匀鼓入流化板(11),流化板(11)避开低低温省煤器(1)底部支座,均匀布置在低低温省煤器(1)底部壳体上,鼓入流化板(11)内的空气将底部积灰流化,使其具备更好的流动性,便于主烟气携带,从而达到减少低低温省煤器(1)底部积灰的目的。In the system shown in Fig. 1, when the electrostatic precipitator (4) is in normal operation, regardless of whether the low-low temperature economizer (1) is in operation or not, the dust-removed flue gas from the outlet flue (5) of the electrostatic precipitator is extracted into the system. The soot blowing flue (6), after being pressurized by the soot blower (7), blows the flue gas evenly into the fluidized plate (11) through the air distribution pipe (10), and the fluidized plate (11) avoids low and low temperature and saves coal The bottom support of the economizer (1) is evenly arranged on the bottom shell of the low and low temperature economizer (1). It is convenient for the main flue gas to be carried, so as to achieve the purpose of reducing the ash accumulation at the bottom of the low and low temperature economizer (1).

本发明运行成本低、检修和运行维护方便。The invention has low operation cost, convenient maintenance and operation and maintenance.

上述仅为本发明的具体实施方式,本发明的技术特征并非局限于此,任何本领域的技术人员在本发明的领域内所作的变化或修饰均应纳入本发明的专利范围之中。The above are only specific embodiments of the present invention, and the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art in the field of the present invention should be included in the patent scope of the present invention.

Claims (3)

1.一种用于低低温省煤器利用烟气吹灰的装置和方法,主要由低低温省煤器(或低温省煤器)、低低温省煤器进口烟道、低低温省煤器出口烟道、静电除尘器、静电除尘器出口烟道、吹灰烟道、吹灰风机、吹灰风机进口挡板门、吹灰风机出口挡板门、布风管和流化板组成,其特征在于:所述低低温省煤器换热管采用光管、螺旋翅片、H型翅片或双H型翅片型式,换热管材质采用20钢、ND钢、不锈钢管等,所述低低温省煤器介质为水,壳程介质为烟气,所述低低温省煤器根据用途不同,包括低温省煤器、低压省煤器等。1. A device and method for low-low temperature economizer using flue gas soot blowing, mainly consisting of low-low temperature economizer (or low-temperature economizer), low-low temperature economizer inlet flue, low-low temperature economizer It is composed of outlet flue, electrostatic precipitator, electrostatic precipitator outlet flue, soot blowing flue, soot blower, soot blower inlet baffle door, soot blower outlet baffle door, air distribution pipe and fluidization plate. It is characterized in that: the low-low temperature economizer heat exchange tube adopts the type of plain tube, spiral fin, H-shaped fin or double H-shaped fin, and the heat exchange tube is made of 20 steel, ND steel, stainless steel tube, etc. The low and low temperature economizer medium is water, and the shell side medium is flue gas. The low and low temperature economizers include low temperature economizers, low pressure economizers, etc. according to different uses. 2.根据权利要求书1所述低低温省煤器出口烟道与静电除尘器连接;所述静电除尘器出口烟道布置在静电除尘器出口;所述吹灰烟道连接低低温省煤器底部壳体和静电除尘器出口烟道;所述吹灰风机进口挡板门、吹灰风机、风机出口挡板门、布风管、流化板依次布置在吹灰烟道上。2. According to claim 1, the outlet flue of the low-low temperature economizer is connected with the electrostatic precipitator; the outlet flue of the electrostatic precipitator is arranged at the outlet of the electrostatic precipitator; the soot blowing flue is connected to the low-low temperature economizer Bottom shell and electrostatic precipitator outlet flue; the soot blower inlet baffle door, soot blower, fan outlet baffle door, air distribution pipe and fluidization plate are arranged on the soot blower flue in sequence. 3.根据权利要求书1所述所述流化板为弧形结构,均匀布置在低低温省煤器壳体底部;所述布风管水平接入流化板,可以防止布风管内积灰,堵塞管道。3. According to claim 1, the fluidized plate has an arc-shaped structure and is evenly arranged at the bottom of the low-low temperature economizer shell; , block the pipe.
CN202010184485.XA 2020-03-17 2020-03-17 A device and method for blowing soot by using flue gas in a low-low temperature economizer Pending CN111271718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010184485.XA CN111271718A (en) 2020-03-17 2020-03-17 A device and method for blowing soot by using flue gas in a low-low temperature economizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010184485.XA CN111271718A (en) 2020-03-17 2020-03-17 A device and method for blowing soot by using flue gas in a low-low temperature economizer

Publications (1)

Publication Number Publication Date
CN111271718A true CN111271718A (en) 2020-06-12

Family

ID=70997817

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010184485.XA Pending CN111271718A (en) 2020-03-17 2020-03-17 A device and method for blowing soot by using flue gas in a low-low temperature economizer

Country Status (1)

Country Link
CN (1) CN111271718A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113834083A (en) * 2021-11-03 2021-12-24 西安热工研究院有限公司 System for preventing induced draft fan from stalling and working method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203099860U (en) * 2012-12-24 2013-07-31 华泰集团有限公司 Fluidifying ash conveying and discharging device below boiler economizer
CN103307617A (en) * 2013-06-05 2013-09-18 西安热工研究院有限公司 Pneumatic dust cleaning device of boiler
CN208536019U (en) * 2018-06-20 2019-02-22 中国华电科工集团有限公司 The deashing device of novel low low-level (stack-gas) economizer
CN109442445A (en) * 2018-10-16 2019-03-08 华电电力科学研究院有限公司 A kind of novel soot blower system and its working method for station boiler horizontal flue
CN110743301A (en) * 2019-10-18 2020-02-04 华电电力科学研究院有限公司 Coal-fired power plant electric bag dust removal system and method
CN212673251U (en) * 2020-03-17 2021-03-09 北京龙电宏泰环保科技有限公司 Device for blowing soot by using flue gas for low-temperature economizer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203099860U (en) * 2012-12-24 2013-07-31 华泰集团有限公司 Fluidifying ash conveying and discharging device below boiler economizer
CN103307617A (en) * 2013-06-05 2013-09-18 西安热工研究院有限公司 Pneumatic dust cleaning device of boiler
CN208536019U (en) * 2018-06-20 2019-02-22 中国华电科工集团有限公司 The deashing device of novel low low-level (stack-gas) economizer
CN109442445A (en) * 2018-10-16 2019-03-08 华电电力科学研究院有限公司 A kind of novel soot blower system and its working method for station boiler horizontal flue
CN110743301A (en) * 2019-10-18 2020-02-04 华电电力科学研究院有限公司 Coal-fired power plant electric bag dust removal system and method
CN212673251U (en) * 2020-03-17 2021-03-09 北京龙电宏泰环保科技有限公司 Device for blowing soot by using flue gas for low-temperature economizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113834083A (en) * 2021-11-03 2021-12-24 西安热工研究院有限公司 System for preventing induced draft fan from stalling and working method thereof

Similar Documents

Publication Publication Date Title
CN202254893U (en) Flue gas radiation-type waste heat boiler recovery system for electric arc furnace
CN102284361B (en) Flue gas dust removal system and electric dust remover thereof
CN103104926B (en) A kind of compound soot blower system in low-temperature flue gas waste heat recovery system
CN204438087U (en) A kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device
CN204307461U (en) Steam generator system high temperature fume dust removal device
CN210486528U (en) Industrial silicon flue gas purification system
CN201382702Y (en) A low-temperature flue gas waste heat power generation boiler for ferrosilicon submerged arc furnace
CN106996577A (en) A kind of block-resistant type air preheater step-by-step arrangement system
CN204268909U (en) The dedusting of industrial flue gas and heat recovery electricity generation system
CN101706109A (en) Embedded deep cooler for boiler flue gas
CN111271718A (en) A device and method for blowing soot by using flue gas in a low-low temperature economizer
CN201386997Y (en) Forced circulation type waste heat boiler of cement kiln
CN201028567Y (en) Heat Pipe Air Preheater
CN212673251U (en) Device for blowing soot by using flue gas for low-temperature economizer
CN202195467U (en) Coke oven flue gas waste heat recovery system
CN209706120U (en) A dust removal device for steam air preheater
CN209386333U (en) Smoke recycling and whitening system
CN111578723A (en) Metallurgical high temperature dust-containing waste gas treatment system
CN111947122B (en) Energy-efficient waste heat recovery system of hierarchical utilization
CN201351912Y (en) Steam superheater
CN109519951A (en) A type of flue gas recycling white system
WO2019010589A1 (en) Low-temperature coal-saving apparatus capable of sweeping ash
CN110715557A (en) A kiln flue gas waste heat recovery heat exchanger
CN217154207U (en) Online cleaning device for accumulated dust in boiler tail flue
CN201852473U (en) Cyclone heat exchanger

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination