WO2015032018A1 - 分室除尘器 - Google Patents

分室除尘器 Download PDF

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Publication number
WO2015032018A1
WO2015032018A1 PCT/CN2013/001439 CN2013001439W WO2015032018A1 WO 2015032018 A1 WO2015032018 A1 WO 2015032018A1 CN 2013001439 W CN2013001439 W CN 2013001439W WO 2015032018 A1 WO2015032018 A1 WO 2015032018A1
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Prior art keywords
chamber
dust
air inlet
dust collector
dust cleaning
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PCT/CN2013/001439
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English (en)
French (fr)
Inventor
仲仁兵
束必银
Original Assignee
江苏绿叶机械有限公司
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Publication of WO2015032018A1 publication Critical patent/WO2015032018A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring

Definitions

  • the invention relates to a compartment dust collector, in particular to a dust collector which is automatically switched off-line and online cleaning.
  • the dust collector is a common device used to eliminate dust in dusty airflow in environmental protection engineering and labor protection work.
  • bag filters in China, such as pulse bag type dust collectors, LFS type anti-drying double bag type dust collectors, and so on. Bags During the working process, dust accumulates on the dust bag after a period of time, which may cause problems such as excessive resistance and reduced dust removal efficiency. Therefore, it is necessary to regularly clean the dust bag.
  • Chinese Patent No. CN2 167765Y discloses a bag type dust remover which utilizes valve control to remove dust accumulated in the bag by means of compartmental airflow reversal and cloth bag self-shake off dust.
  • CN1219576C discloses a rotary pulse bag type dust remover which uses an off-line valve to close the cleaning chamber.
  • the pulsed compressed air is used to shake off the dust, and the offline cleaning process is sequentially performed for other sub-chambers in turn.
  • the valve of the chamber is closed, and the filter bag does not participate in dust collection, which will increase the filtering wind speed in the entire precipitator and accelerate the wear of the filter bag.
  • the system resistance will also suddenly increase and the consequences of airflow instability will occur. This is especially true when the dust collector is less than 5 chambers.
  • This kind of cleaning method wants to achieve high dust collection efficiency, and often requires a large product space, which results in high product cost.
  • the present invention is directed to overcoming the above drawbacks, and provides a dust collector for off-line, on-line cleaning automatic switching, specifically, including a dust collector support leg, a lock damper, a ash hopper, a middle box, a steam box, and an upper box.
  • the upper and middle tanks of the dust collector are rectangular, the upper box And a plurality of chambers are respectively formed in the middle of the middle box by means of a partition plate, and the flower board is provided with a plurality of flower plate holes, a filter bag assembly composed of a filter bag and a bag cage connected under the flower plate hole, a dust collector air inlet and an air outlet A pressure sensor is provided, and the pressure sensor sends the measured pressure signal to the electronic control system.
  • the horizontal cross-sectional areas of the plurality of filter chambers are the same, but the poppet valve specifications of the respective 'chambers are different.
  • the poppet valve size of the chamber is sequentially increased from the side closest to the intake port to the farthest from the intake port; or, the flower plate hole area of the sub-chamber located in the middle is larger than the flower plate hole area of the divided chambers on both sides.
  • the horizontal cross-sectional areas of the plurality of filter chambers are different, and the area of the flower plate holes per unit area is kept constant, a single flower
  • the plate hole area can also be kept the same.
  • the poppet valve specifications of the chamber are sequentially increased from the side closest to the intake port to the side farthest from the intake port; or, the horizontal cross-sectional area of the sub-chamber located in the middle is larger than the panel hole area of the divided chambers on both sides.
  • the invention also relates to a dust collector cleaning process, comprising: selecting a compartment cleaning, when the pressure difference of the outlet port relative to the air inlet is not lower than a set value, the cleaning chamber poppet valve is closed, the cleaning chamber
  • the filter bag does not participate in the work, the dust collector performs off-line cleaning, and the cleaning system is used.
  • the system can be, for example, a pulse reverse blow-off cleaning device; when offline cleaning for a period of time, the air outlet pressure is relatively advanced due to the increase in resistance.
  • the purging chamber poppet valve is opened, and online cleaning is performed; when the pressure difference of the outlet port relative to the air inlet is not lower than the set value again, the chamber can be offline again.
  • Ash after the lower than the set value, the line is cleaned; the cycle is repeated, and the number of cycles is selected; after that, the above operation is performed for other chambers until all the dust collector compartments are cleaned.
  • the pressure difference of the air outlet pressure with respect to the air inlet is set to -10 O OPa , and this parameter can be adjusted according to the dust characteristics.
  • the cleaning operation is first started from the chamber having the smallest specification of the poppet valve, and the cleaning chamber is selected in the order of small to large according to the specifications.
  • the dust collector and the operation process of the offline and online cleaning automatic switching according to the present invention have the following advantages: the offline switching and the online cleaning automatic switching can be realized, the utilization rate of the dust collector is improved, and the use space of the device is saved. The service life of the filter bag is extended and the airflow of the dust collector is more stable.
  • Figure 1 is a schematic view showing the structure of a dust collector according to the present invention.
  • Figure 2 is a schematic view of the dust collector showing the state of the online cleaning gas stream
  • Figure 3 is a schematic view of the dust collector showing the state of off-line cleaning gas flow
  • Figure 4 is a cross-sectional view taken along line ⁇ - ⁇ in Figure 2 or Figure 3.
  • the dust collector support leg 1, the air lock valve 2, the ash hopper 3, the middle box 4 (filter box), the air box 5, and the upper box are automatically switched according to the present invention.
  • 6 clean air box
  • cleaning system ladder 8
  • guardrail 9 dust filter bag 10
  • bag cage 1 poppet valve 1
  • poppet valve flower plate ⁇
  • partition plate 1 air inlet and outlet.
  • the upper and middle tanks of the dust collector are rectangular, and the upper and middle tanks respectively form a plurality of chambers by means of the partitions 14, wherein the middle tank comprises a plurality of filtering compartments, and the upper tank comprises a plurality of clean air. room.
  • the flower board 13 has a filter bag assembly composed of a plurality of flower plate holes, and a filter bag and a bag cage connected to the flower plate hole.
  • the air inlet and the air outlet of the dust collector are provided with a pressure sensor, and the pressure sensor sends the measured pressure signal to the electronic control System.
  • the dust collector When the dust collector is working, the dusty airflow enters the ash hopper from the air inlet, part of the dust hits the baffle between the box and the ash hopper and falls into the ash hopper. The remaining dust enters the middle tank with the airflow, and then passes through the dust collecting filter.
  • the bag enters the upper casing, and the dust is trapped on the outer surface of the dust collecting filter bag. The thousand airflow enters the windbox through the upper tank and is then discharged from the air outlet.
  • the plurality of filter chambers of the precipitator according to the present invention have the same horizontal cross-sectional area, but the poppet valve specifications of the respective chambers are different (for example, the area of each of the flower plate holes is the same, the number of sets is different; if the number is set Different, the area of the flower plate holes used in a certain room is not equal, and the filter bag assembly is different at this time: the former is preferred)own
  • the poppet valve specifications of the chamber are sequentially increased; in another embodiment, the partition area of the partition in the middle is larger than the area of the partition of the partitions on both sides.
  • the plurality of filter chambers of the precipitator according to the present invention have different poppet valve specifications, and the unit of the flower area per unit area is from the side closest to the inlet port to the side farthest from the inlet port.
  • the riser valve specification of the chamber increases sequentially; in another embodiment, the level of the compartment located in the middle The cross-sectional area is larger than the flower plate hole area of the compartments on both sides. The purpose of this setting is the same as above.
  • the cleaning chamber poppet valve When it is necessary to clean the dust (for example, it can be monitored by the pressure of the pressure sensor), for a certain chamber, when the pressure difference between the air outlet pressure and the air inlet is not lower than the set value, the cleaning chamber poppet valve is closed.
  • the cleaning chamber filter bag does not participate in the work, the dust collector is off-line cleaning, and the cleaning system is used.
  • the system can be, for example, a pulse reverse blow-off cleaning device; the air flow state is as shown in Fig. 3, and the air flow is from non-cleaning.
  • the chamber passes. When the line is cleaned for a period of time, the resistance of the outlet is reduced, and the pressure difference between the outlet port and the air inlet is lower than the set value.
  • the cleaning chamber poppet valve is opened, and the online cleaning is performed (the cleaning valve is cleaned after being opened).
  • the room generates airflow disturbance, which can shake off the dust on the filter bag), and the cleaning chamber filter bag is put into operation.
  • the pressure difference between the outlet port and the air inlet is not lower than the set value
  • the chamber can be cleaned again offline, and then the line is cleaned when the value is lower than the set value; and the appropriate number of cycles can be selected to ensure the cycle number is ensured.
  • the above operation can be performed for other chambers until all the dust collector compartments are cleaned.
  • Related operations can be done by an electronic control system.
  • the pressure difference of the outlet port pressure with respect to the air inlet is set to -1 000 Pa. Since the absolute difference between the pressure of the air outlet and the air inlet is not excessive, the wear of the filter bag is reduced.
  • the cleaning operation is first started from the chamber with the smallest poppet valve specification.
  • the compartments are selected for cleaning operations in order of small to large size. In this way, cleaning from the chamber with the highest specification of the poppet valve can effectively reduce the absolute value of the pressure difference between the outlet port and the air inlet, thereby reducing the wear of the filter bag and making the dust collector flow more stable.
  • the dust remover according to the present invention can realize off-line, automatic on-line cleaning, which improves the utilization rate of the dust collector, saves the use space of the equipment, prolongs the service life of the filter bag, and makes the airflow of the dust collector more stable.

Abstract

提供了一种分室除尘器以及使用其的清灰工艺，该分室除尘器包括支撑腿（1）、锁风阀（2）、灰斗（3）、中箱体（4）、汇风箱（5）、上箱体（6）、清灰系统、爬梯（8）、护栏（9）、收尘滤袋（10）、袋笼（11）、提升阀（12）、花板（13）和隔板（14）、进风口和出风口，除尘器上箱体（6）和中箱体（4）呈矩形，上箱体（6）和中箱体（4）内部借助于隔板（14）分别形成多个室，花板（13）设有若干个花板孔，花板孔下连接滤袋（10）和袋笼（11）组成的滤袋组件，除尘器进风口和出风口设置有压力传感器。

Description

说 明 书
分室除尘器 技术领域
本发明涉及一种分室除尘器， 尤其涉及一种离线、 在线清灰自动切换的收尘器。
背景技术
除尘器是环境保护工程和劳动保护工作中用于消除含尘气流中的粉尘的常用装置。 国内 外的布袋除尘器种类很多， 例如脉冲袋式除尘器、 LFS 型反吹风双层袋式除尘器等等。 布袋 除尘器在工作过程中， 一段时间后粉尘在除尘布袋上积聚， 会导致阻力过大、 除尘效率下降 等问题， 因此需要定时针对除尘布袋进行清灰。 例如中国专利 CN2 167765Y公开了一种布袋式 除尘器， 其利用阀门控制， 采用分室气流换向、 布袋自行抖落粉尘的方式清除布袋内积尘。 再例如中国专利 CN1219576C公开了一种回转脉沖袋式除尘器, 其利用离线阀关闭清灰室. 采 用脉沖压缩空气抖落粉尘， 并回转地依次针对其他分室进行离线清灰处理。 但是， 当收尘器 的某个室离线清灰时， 该室的阀门关闭， 滤袋不参与收尘， 这将会导致整个除尘器内过滤风 速加大， 加快了滤袋的磨损， 同时由于系统阻力也会突然最大进而形成气流不稳的后果， 当 收尘器少于 5 个室时， 这种情况尤为明显。 这种清灰方式想要达到较高的收尘效率， 往往会 要求产品空间庞大， 因此造成产品成本过高。
发明内容
本发明旨在克服上述缺陷， 提供一种离线、 在线清灰自动切换的收尘器， 具体地， 包括 收尘器支撑腿、 锁风阀、 灰斗、 中箱体、 汇风箱、 上箱体、 清灰系统、 爬梯、 护栏、 收尘滤 袋、 袋笼、 提升阀、 花板和隔板、 进风口和出风口， 其特征在于除尘器上箱体和中箱体呈矩 形， 上箱体和中箱体内部借助于隔板分别形成多个室， 花板设有若千个花板孔， 花板孔下连 接滤袋和袋笼组成的滤袋组件， 收尘器进风口和出风口设置有压力传感器， 压力传感器将测 量到的压力信号发送至电控系统。
优选地， 多个过滤室的水平橫戴面积相同， 但各个 '室的提升阀规格不同。
优选地， 从最靠近进气口一侧到最远离进气口一例， 室的提升阀规格依次增大； 或者， 位于中间的分室的花板孔面积大于两边的分室的花板孔面积。
优选地， 多个过滤室的水平横截面积不同， 单位面积上的花板孔面积保持恒定， 单个花 板孔面积也可以保持相同。
优选地， 从最靠近进气口一侧到最远离进气口一侧， 室的提升阀规格依次增大； 或者， 位于中间的分室的水平横截面积大于两边的分室的花板孔面积。
本发明也涉及一种收尘器清灰工艺， 包括： 选择一分室清灰， 当出风口压力相对于进风 口的压力差不低于设定值时， 清灰室提升阀关闭， 清灰室滤袋不参加工作， 收尘器实行离线 清灰， 采用清灰系统， 该系统例如可以是脉冲反向分吹清灰装置； 当离线清灰一段时间， 由 于阻力增大， 出风口压力相对于进风口的压力差低于设定值时， 清灰室提升阀打开， 实行在 线清灰； 当出风口压力相对于进风口的压力差再次不低于设定值时， 可针对该室再次离线清 灰， 之后低于设定值时在线清灰； 周而复始， 并选择周期次数； 此后， 再针对其他室进行上 述操作， 直至全部除尘器分室清灰完毕。
优选地， 出风口压力相对于进风口的压力差设定值为- l O O OPa , 此参数可根据粉尘特征进 行调整。
优选地， 当各个室的花板孔总面积不同时， 首先从提升阀规格最小的那个室开始清灰操 作， 按规格依从小到大的次序选择分室进行清灰操作。
根据本发明的离线、 在线清灰自动切换的收尘器和操作工艺具有如下优点： 能够实现离 线、 在线清灰自动切换， 使得收尘器的利用率得到了提高， 节省了设备的使用空间、 延长了 滤袋的使用寿命、 收尘器气流更为平稳。
附图说明
图 1是根据本发明的收尘器的结构示意图；
图 2是显示在线清灰气流状态的收尘器示意图；
图 3是显示离线清灰气流状态的收尘器示意图；
图 4是图 2或图 3中的 Λ-Λ剖视图。
具体实施方式
参见图 1 -4， 根据本发明的离线、 在线清灰自动切换的收尘器支撑腿 1、 锁风阀 2、 灰斗 3、 中箱体 4 (过滤箱） 、 汇风箱 5、 上箱体 6 (净气箱） 、 清灰系统、 爬梯 8、 护栏 9、 收尘 滤袋 1 0、 袋笼 1 1、 提升阀 1 2、 花板 Π和隔板 1 4、 进风口和出风口。 除尘器上箱体和中箱体 呈矩形， 上箱体和中箱体内部借助于隔板 1 4分别形成多个室， 即中箱体包括多个过滤分室， 上箱体包括多个净气室。 花板 1 3设有若千个花板孔， 花板孔下连接滤袋和袋笼组成的滤袋组 件。 收尘器进风口和出风口设置有压力传感器， 压力传感器将测量到的压力信号发送至电控 系统。 收尘器工作时， 含尘气流从进风口进入灰斗， 部分粉尘撞击中箱体和灰斗之间的挡板 后落入灰斗， 其余粉尘随气流进入中箱体， 然后通过收尘滤袋进入上箱体， 此时粉尘被截留 在收尘滤袋外表面。 千净气流经由上箱体进入汇风箱， 然后从出风口排出。
优选地， 根据本发明的除尘器的多个过滤室的水平横截面积相同， 但各个室的提升阀规 格不同 （例如， 每个花板孔面积相同， 则设置个数不同； 如果设置个数不同， 则某个室采用 的花板孔面积不等， 此时滤袋组件也不同： 优选前者） „ 在一个实施方式中， 从最靠近进气 口一侧到最远离进气口一侧， 室的提升阀规格依次增大； 在另一个实施方式中， 位于中间的 分室的花板孔面积大于两边的分室的花板孔面积。 这种设置方式的目的在于， 含尘气流从进 风口进入灰斗， 灰斗中的气压分布是不均匀的， 在压力不同的地方选择不同的花板孔面积在 离线清灰时会造成更小的不良影响； 至于前两个实施方式的选择则与进风口设置的位置和角 度相关。
更优选地， 4艮据本发明的除尘器的多个过滤室的提升阀规格不同， 此时单位面积上的花 施方式中， 从最靠近进气口一侧到最远离进气口一侧， 室的提升阀规格（由于单位面积上的 花板孔面积保持恒定， 花板孔面积也正比于室的水平横截面积） 依次增大； 在另一个实施方 式中， 位于中间的分室的水平横截面积大于两边的分室的花板孔面积。 这种设置方式的目的 同上。
在需要清灰时 （例如可以通过压力传感器的压力来监测） ， 针对某个室来说， 当出风口 压力相对于进风口的压力差不低于设定值时， 清灰室提升阀关闭， 清灰室滤袋不参加工作， 收尘器实行离线清灰， 采用清灰系统， 该系统例如可以是脉冲反向分吹清灰装置； 气流状态 如图 3所示， 此时气流从非清灰室通过. 当离线清灰一段时间， 由于阻力减小， 出风口压力 相对于进风口的压力差低于设定值时， 清灰室提升阀打开， 实行在线清灰（提升阀打开后清 灰室产生气流扰动， 可以抖落滤袋上的灰尘） ， 清灰室滤袋投入工作。 当出风口压力再次相 对于进风口的压力差不低于设定值时， 可针对该室再次离线清灰， 之后低于设定值时在线清 灰； 周而复始， 可选择适当的周期次数， 确保清灰室清灰铰彻底即可 此后， 再针对其他室 进行上述操作， 直至全部除尘器分室清灰完毕。 相关操作可由电控系统完成。 优选地， 出风 口压力相对于进风口的压力差设定值为 -1 000Pa。由于出风口压力相对于进风口的压力差绝对 值不会过大， 因此降低了滤袋的磨损
优选地， 当各个室的提升阀规格不同时， 首先从提升阀规格最小的那个室开始清灰操作， 按规格依从小到大的次序选择分室进行清灰操作。 这样从提升阀规格最 、的那个室开始清灰 能够有效降低出风口压力相对于进风口的压力差绝对值， 进而也就可以降低滤袋的磨损， 同 时收尘器气流更为平稳。
根据本发明的除尘器能够实现离线， 在线清灰自动切换， 使得收尘器的利用率得到了提 高， 节省了设备的使用空间、 延长了滤袋的使用寿命、 收尘器气流更为平稳。

Claims

权 利 要 求 书
1、 一种分室除尘器， 包括收尘器支撑腿、 锁风阀、 灰斗、 中箱体、 汇风箱、 上箱体、 清灰系 统、 爬梯、 护栏、 收尘滤袋、 袋笼、 提升阀、 花板和隔板、 进风口和出风口， 其特征在于除 尘器上箱体和中箱体呈矩形， 上箱体和中箱体内部借助于隔板分别形成多个室， 花板设有若 千个花板孔， 花板孔下连接滤袋和袋笼组成的滤袋组件， 收尘器进风口和出风口设置有压力 传感器， 压力传感器将测量到的压力信号发送至电控系统。
2、 根据权利要求 1所述的分室除尘器， 其特征在于多个过滤室的水平横截面积相同， 但各个 室的提升阀规格不同。
3、根据权利要求 1和 1所述的分室除尘器， 其特怔在于从最靠近进气口一侧到最远离进气口 一侧， 室的提升阀规格依次增大； 或者， 位于中间的分室的花板孔面积大于两边的分室的花 板孔面积。
4、 根据前述任一项权利要求所述的分室除尘器， 其特征在于多个过滤室的提升阀规格不同， 单位面积上的花板孔面积保持恒定， 单个花板孔面积也保持相同。
5、根据前述任一项权利要求所述的分室除尘器， 其特征在于从最靠近进气口一侧到最远离进 气口一侧， 室的提升阀规格依次增大； 或者， 位于中间的分室的水平横截面积大于两边的分 室的花板孔面积。
6、 根据前述任一项权利要求所述的分室除尘器的清灰工艺， 其特征在于选择一分室清灰， 当 出风口压力相对于进风口的压力差不低于设定值时， 清灰室提升阀关闭， 清灰室滤袋不參加 工作， 收尘器实行离线清灰， 采用清灰系统， 该系统例如可以是脉冲反向喷吹清灰装置； 当 离线清灰一段时间， 由于阻力减小， 出风口压力相对于进风口的压力差低于设定值时， 清灰 室提升阀打开， 实行在线清灰； 当出风口压力相对于进风口的压力差再次不低于设定值时， 可针对该室再次离线清灰， 之后低于设定值时在线清灰； 周而复始， 并选择周期次数； 此后， 再针对其他室进行上述操作， 直至全部除尘器分室清灰完毕
7、根据权利要求 6所述的清灰工艺， 其特征在于出风口压力相对于进风口的压力差设定值为 -1 000Pa o
8、 根据权利要求 6或 7所述的分室除尘器， 其特征在于当各个室的提升阀规格不同时， 首先 从提升阀规格最 d、的那个室开始清灰操作，按面积依从 'j、到大的次序选择分室进行清灰操作。
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