CN2631613Y - 大型分室脉动反吹袋式除尘器 - Google Patents

大型分室脉动反吹袋式除尘器 Download PDF

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CN2631613Y
CN2631613Y CN 03211376 CN03211376U CN2631613Y CN 2631613 Y CN2631613 Y CN 2631613Y CN 03211376 CN03211376 CN 03211376 CN 03211376 U CN03211376 U CN 03211376U CN 2631613 Y CN2631613 Y CN 2631613Y
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彭志民
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Beijing Medium Energy Environmental Engineering Co Ltd
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Abstract

一种大型分室脉动反吹袋式除尘器,它包括多个单台分室脉动反吹袋式除尘器组合而成,在每单台除尘器的入口装有单板柔缘截止阀、气流分布板及粉尘预分离装置、冷风阀、粉尘预涂装置,在每单台除尘器的出口装有单板柔缘截止阀,在除尘器的旁路烟道装有柔性薄板提升阀。这种新型的装置可使烟气流速均匀、大颗粒粉尘及未燃尽的煤粒预先被分离至集灰斗中,避免滤袋被磨损和烧坏;并可实现功换在线检修;可广泛用于处理600MW发电机组燃煤锅炉的烟气。

Description

大型分室脉动反吹袋式除尘器
技术领域
:本实用新型涉及一种大型分室脉动反吹袋式除尘装置。
背景技术
:目前,国内外燃煤使用的袋式除尘装置主要有这么几种,1、大型分室反吹袋式除尘器,属内滤式低气布比除尘器,利用净化后的烟气进行分室反吹,有利延长滤袋寿命,存在的不足是设备占地面积大、造价高、结构复杂。2、回转式低压脉冲除尘器,此种除尘器设备占地面积小、清灰压力低、一般用0.1MPA左右的压缩空气进行回转式逐袋反向脉冲清灰,有利于延长滤袋寿命,存在的不足是设备造价昂贵、清灰频率较高、运行耗电较高。为了解决这一问题,人们作了多种努力,如中国专利公布了一项名称为“分室脉动反吹玻璃纤维袋式除尘器”的技术,该装置利用分室定位回转机构实现分室脉动反吹,属离线弱性清灰,清灰压力仅为0.003MPA,清灰效率高,除尘器维护量小、耗电量少、占地面积小,存在的不足是实现大型化需进一步改进。
实用新型内容:本实用新型要解决的技术问题是提供一种大型分室脉动反吹袋式除尘器,大型分室脉动反吹袋式除尘器包括多个单台分室脉动反吹袋式除尘器组合而成,在每单台除尘器的入口装有单板柔缘截止阀、气流分布板及粉尘预分离装置、冷风阀、粉尘预涂装置,在每单台除尘器的出口装有单板柔缘截止阀,在除尘器的旁路烟道装有柔性薄板提升阀。本实用新型由于是由多个单台分室脉动反吹袋式除尘器组合而成,因此可处理600MW发电机组燃煤锅炉的烟气;本实用新型由于设置有分室脉动反吹装置与高密度袋笼自动张紧滤袋装置因此使外滤式高气布比袋式除尘器实现了离线反吹,替代了以往压缩空气系统数量较多脉冲阀清灰装置,使除尘器成为运行可靠、少维护、体积小、造价低由于在每单台除尘器的烟进气口处装有气流分布板与粉尘预分离装置,可使烟气流速均匀、大颗粒粉尘及未燃尽的煤粒预先被分离至集灰斗中,避免滤袋被磨损和烧坏;由于在每台除尘器的进出气口处装有单板柔缘截止阀因此可实现功换在线检修;由于在每单台除尘器的烟气口处装有冷风阀,因此在除尘器停机时打开冷风阀,把滞留在除尘器的锅炉烟气置换出去可防止除尘器停机后产生结露。
附图说明
:图1为本实用新型正面视图;图2为图1的俯视图;图3为图1的A-A剖视图;图4为柔性薄板提升阀正常运行状态视图;图5为柔性薄板提升阀旁路运行状态视图;图6为截止阀截止工作状态视图;图7为截止阀导通工作状态视图;具体实施方式:如图所示,大型分室脉动反吹袋式除尘器包括多个单台分室脉动反吹袋式除尘器15组合而成,每个单台由钢支架1、集灰斗2、壳体3组成,分室脉动反吹装置由反吹风机、脉动阀、分度凸轮间歇传动机构组成,其工作过程是:反吹风机把净化后的烟气抽回、经脉动阀形成脉动气流由分度凸轮间歇传动机构把脉动反吹气流分配到各个袋室进行逐室脉动离线反吹。在除尘器的进风口11装有单板柔缘截止阀5、气流分布板及粉尘预分离装置、冷风阀、粉尘预涂装置,在每单台除尘器的出口装有单板柔缘截止阀。在除尘器的旁路烟道装有柔性薄板提升阀,柔性薄板提升阀包括一个阀体、其内装有阀座、电动推杆的下部固定有阀板、电动推杆的支座固定在阀体上。在除尘壳体3内,设置有高密度袋笼自动张紧滤袋装置。当烟气进入风口时,经气流分布板及粉尘预分离装置4时、烟气流速变成均匀的,大棵粒粉尘及未燃尽的煤粒被予先分离进集灰斗2、经均布和予分离的烟气进入除尘壳体3内,在高密度袋笼自动张紧滤袋装置6的阻挡和筛滤下、粉尘被阻挡在滤袋的外表面,被净化的烟气穿过滤袋、从滤袋的上口的导风罩8进入除尘器的净气室,由出风口10排出。被滞留在滤袋外表面的粉尘层增厚、阻力增大,当达到调定值时,压差计输出电信号,反吹风机12、脉动阀13、分室反吹机构9同时启动,反吹风机吸进净化后的烟气、经脉动阀13的作用形成脉动气流,由分室反吹机构9的间歇定位作用把脉动反吹气体依次反吹进各导风罩8,脉动反吹气流从滤袋的内表面把滤袋的外表面的粉尘层吹落进集灰斗2,当每套分室反吹机构依次清完灰后,除尘器的阻力下降到调定下限值时,差压仪输出停止电信号,反吹风机12、脉动阀13、分室反吹机构9同时停止,除尘器全部进入过滤状态。当锅炉发生尾部燃烧产生高温烟气达到温度上限时,旁路烟道中的柔性薄板提升阀14自动打开,使高温烟气暂时旁路、保护滤袋不被烧损;锅炉故障排除后,烟气达到下限时柔性薄板提升阀14自动关闭。。当锅炉停炉时,烟气温度降到下限冷风阀7自动打开,在锅炉引风机的作用下室外空气被吸入、滞留在除尘器内部的烟气被排出后冷风阀7自动关闭,这样除尘器停机后不会发生结露。当锅炉点炉时,可打开粉尘预涂装置,在锅炉引风机的作用下把粉尘先吸附在滤袋外表面形成粉尘后除尘器再投入运行,不会发生油污粘袋现象。

Claims (3)

1.一种大型分室脉动反吹袋式除尘器其特征在于:它包括多个单台分室脉动反吹袋式除尘器组合而成,在每单台除尘器的入口装有单板柔缘截止阀、气流分布板及粉尘预分离装置、冷风阀、粉尘预涂装置,在每单台除尘器的出口装有单板柔缘截止阀,在除尘器的旁路烟道装有柔性薄板提升阀。
2.如权利要求1所述的除尘器,其特征在于:柔性薄板提升阀包括一个阀体、其内装有阀座、电动推杆的下部固定有阀板、电动推杆的支座固定在阀体上。
3.如权利要求1所述的除尘器,其特征在于:除尘壳体内设置有高密度袋笼自动张紧滤袋装置。
CN 03211376 2003-02-13 2003-02-13 大型分室脉动反吹袋式除尘器 Expired - Lifetime CN2631613Y (zh)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1330402C (zh) * 2005-02-21 2007-08-08 张彤 一种用于燃煤锅炉或炉窑的袋式除尘器
CN101972572A (zh) * 2010-10-30 2011-02-16 山西平朔煤矸石发电有限责任公司 分室反吹除尘器
CN103657280A (zh) * 2012-09-19 2014-03-26 江苏省旭日冶金环保设备有限公司 一种多功能脉冲袋式收尘器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1330402C (zh) * 2005-02-21 2007-08-08 张彤 一种用于燃煤锅炉或炉窑的袋式除尘器
CN101972572A (zh) * 2010-10-30 2011-02-16 山西平朔煤矸石发电有限责任公司 分室反吹除尘器
CN103657280A (zh) * 2012-09-19 2014-03-26 江苏省旭日冶金环保设备有限公司 一种多功能脉冲袋式收尘器

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