WO2021203836A1 - 一种内通道可变的袋底增强式滤袋清灰方法及过滤装置 - Google Patents

一种内通道可变的袋底增强式滤袋清灰方法及过滤装置 Download PDF

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Publication number
WO2021203836A1
WO2021203836A1 PCT/CN2021/076391 CN2021076391W WO2021203836A1 WO 2021203836 A1 WO2021203836 A1 WO 2021203836A1 CN 2021076391 W CN2021076391 W CN 2021076391W WO 2021203836 A1 WO2021203836 A1 WO 2021203836A1
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Prior art keywords
bag
filter bag
filter
cloth bag
shaped steel
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PCT/CN2021/076391
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English (en)
French (fr)
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葛仕福
周彩玲
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东南大学
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Publication of WO2021203836A1 publication Critical patent/WO2021203836A1/zh

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    • 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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • 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
    • B01D46/0001—Making filtering elements
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • B01D46/60—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Definitions

  • the invention relates to a dust removal method and a filter device for a bag bottom reinforced filter bag with a variable inner channel for a bag filter, which can enhance the dust removal effect and uniformity, increase the area of the filter bag per unit volume, and reduce the bag dust removal The floor space and manufacturing cost of the device.
  • Bag filter is the main and key equipment for the treatment of flue gas particulate matter. It has been industrially used for nearly a hundred years and has a great demand. Improvements in increasing the collection area per unit volume and enhancing the ash removal effect will produce a greater social economy benefit.
  • the filter bag filter adopts pulse cleaning, and there is also a small amount of atmospheric back-blowing cleaning. Both cleaning methods use the cleaning airflow. Its function is mainly to change the normal operation state and cause filtration. The instantaneous positive pressure and shaking inside the bag will cause the dust outside the filter bag to fall off to achieve dust removal. There are two main factors that affect the cleaning effect: (1) The peak pressure in the filter bag during cleaning is related to the flow rate of cleaning air per unit area of the channel in the filter bag. For a certain amount of cleaning air flow, the filter bag The smaller the cross-sectional area of the inner channel, the greater the pressure peak, the better the cleaning effect; (2) The pressure rise in the filter bag is positively correlated with the axial velocity of the cleaning air flow. The greater the axial speed of the cleaning air flow, the pressure inside the filter bag The greater the ascent speed, the better the cleaning effect.
  • the filter bag is a straight cylinder, the upper and lower cross-sectional areas are the same.
  • the axial velocity of the upper part of the filter bag is relatively large.
  • the flow rate of ash cleaning air is reduced, the axial velocity of ash cleaning air flow is reduced, the pressure rise rate in the filter bag is reduced, and the cleaning effect at the bottom of the filter bag is worse than that in the middle.
  • the flow of ash cleaning gas at the bottom of the filter bag is small, and the cross-sectional area of the channel in the filter bag does not change, resulting in a drop in the pressure peak in the filter bag.
  • the cleaning effect is poor.
  • the long filter bag bag filter used for waste incineration flue gas treatment has high flue gas moisture content, and the phenomenon of particulate matter sticking to the filter bag at the bottom of the filter bag often affects the dust removal effect and the normal operation of the equipment.
  • the filter bag of the bag filter has a large filtering area.
  • the equipment manufacturing cost, installation and civil construction costs of the bag filter are relatively high.
  • the existing filter bag is a straight tube, and the volume space in the filter bag is still relatively large, which is not used. Get up, wasted.
  • the present invention provides a dust removal method and a filter device for a bag bottom reinforced filter bag with a variable inner channel for a bag filter.
  • the present invention can strengthen the dust removal effect of the filter bag, especially the length
  • the uniformity of the peak pressure distribution on the side wall ensures that all parts of the filter bag have the same cleaning strength.
  • the method for cleaning dust from a bag bottom reinforced filter bag with a variable inner channel Take a filter bag and make the inner channel in the filter bag through which the airflow of cleaning dust flows is variable, and the inner channel is variable
  • the cross-sectional area of the inner channel is reduced from the opening of the filter bag to the bottom of the filter bag.
  • the cross-sectional area of the channel in the filter bag is continuously reduced to continuously compress the filter bag.
  • the dust-cleaning airflow increases the impact pressure and speed of the dust-cleaning airflow, which strengthens the dust removal at the bottom of the filter bag, so that the dust particles adhered to the bottom of the filter bag can be removed.
  • the filtering device of the bag bottom reinforced filter bag dust cleaning method with variable inner channel includes a cage frame and a frame pressing sleeve.
  • a cloth bag is sheathed outside the cage frame and the cloth bag and the cage
  • the framework is fitted together.
  • the cage framework includes a cohesive connector and at least 3 V-shaped steel circles. One end of the V-shaped steel circle is fixed to the cohesive connector and encloses to form a conical inwardly recessed cavity.
  • the V-shaped steel The other end of the circle is gathered in the frame compression sleeve, a detachable cloth bag tensioning slider is arranged in the conical inwardly concave cavity, one end of the cloth bag is sleeved on the skeleton compression sleeve, and the other end of the cloth bag Tucked in the cloth bag tensioning slider, embedded in the tapered inwardly concave cavity along with the cloth bag tensioning slider, and secured by one end of the V-shaped steel circle.
  • the present invention has the following advantages:
  • the invention adopts a technical measure that the cross-sectional area of the inner channel is reduced from the opening of the filter bag to the bottom of the filter bag.
  • the filter bag gradually becomes smaller to compress the cleaning air flow to the bottom of the filter bag to maintain or even increase the impact strength of the air flow. And the impact speed, so that the highly viscous particles firmly attached to the lower part of the filter bag can be removed.
  • the filter bag collection surface is set both inside and outside the cage frame, which increases the area of the filter bag per unit volume by more than 50%.
  • the volume of the bag filter is reduced by more than 50%, reducing the equipment occupation.
  • Floor area and equipment manufacturing and installation costs of the bag filter are set both inside and outside the cage frame, which increases the area of the filter bag per unit volume by more than 50%.
  • a V-shaped steel circle is used and one end is fixed to the cohesive connector, and the other end is gathered in the V-shaped steel circle of the frame compression sleeve to form the cross-sectional area of the channel in the direction from the opening of the filter bag to the bottom of the filter bag.
  • the upper and lower filter bags are small, and the upper and lower filter bags are used to pressurize and increase the speed of the dust removal airflow, thereby strengthening the dust removal effect of the bag filter bag.
  • the V-shaped steel circle can also form a W-shaped filter bag and cage frame.
  • a trapping surface is set inside the filter bag, which changes the cross-sectional area of the channel in the filter bag, reduces the cross-sectional area of the lower internal channel, and increases the pressure rise in the filter bag. speed.
  • Figure 1 is a schematic diagram of the structure of the present invention.
  • Fig. 2 is a K-K cross-sectional view in Fig. 1.
  • Fig. 3 is a G-G cross-sectional view in Fig. 1.
  • Fig. 4 is a cross-sectional view of F-F in Fig. 1.
  • Fig. 5 is an enlarged view of E in Fig. 1.
  • Fig. 6 is an enlarged view of C in Fig. 1.
  • Fig. 7 is a cross-sectional view of H-H in Fig. 6.
  • Figure 8 is a schematic diagram of the existing filter bag and cage frame and a flow field diagram of the cleaning airflow.
  • Figure 9 is a schematic diagram of the filter bag and cage frame of the present invention and a flow field diagram of the ash cleaning airflow, in which the arrow indicates the direction of the ash cleaning airflow.
  • a bag bottom enhanced filter bag cleaning method with variable internal channels take a filter bag and make the internal channel in the filter bag through which the cleaning air flow is variable, and the internal channel is variable to make the internal channel
  • the cross-sectional area decreases from the opening of the filter bag to the bottom of the filter bag.
  • the cross-sectional area of the channel in the filter bag is continuously reduced to continuously compress the cleaning airflow and increase
  • the impact pressure and impact speed of the dust removal airflow strengthen the dust removal at the bottom of the filter bag, so that the dust particles stuck to the bottom of the filter bag can be removed.
  • the filter bag adopts a W-shaped filter bag with a W-shaped axial interface, and uses a W-shaped filter bag with a large upper and a small W-shaped filter bag to compress the cleaning air flow toward the bottom of the filter bag, and strengthen the cleaning air flow to the lower part of the filter bag. The impact of this force forced the dust particles adhered to the lower part of the filter bag to fall off.
  • a filter device of a bag bottom reinforced filter bag dust removal method with a variable inner channel comprising a cage frame and a frame pressing sleeve 6, a cloth bag is sleeved on the outside of the cage frame, and the cloth bag 1 is attached to the cage frame
  • the cage frame includes a cohesive connector 4 and at least three V-shaped steel circles 2.
  • One end of the V-shaped steel circle 2 is fixed to the cohesive connector 4 and encloses to form a cone-shaped inwardly recessed cavity, refer to the figure 5.
  • one end of the V-shaped steel circle 2 can be welded to the position D of the cohesive connector 4, and the other end of the V-shaped steel circle 2 can be gathered in the frame pressing sleeve 6.
  • the V-shaped steel circle can be specifically The other end of the steel circle 2 is welded to the C of the frame pressing sleeve 6, a detachable cloth bag tensioning slider 3 is provided in the conical inwardly concave cavity, and one end of the cloth bag 1 is sleeved on the frame pressing sleeve 6 Above, the other end of the cloth bag 1 is gathered in the cloth bag tensioning slider 3, and the cloth bag tensioning slider 3 is inserted into the conical inwardly recessed cavity and secured by one end of the V-shaped steel circle 2. Wherein, the cloth bag 1 is attached to the cage frame, which means that the cloth bag 1 is well covered on the cage frame.
  • the cloth bag 1 is made into a cloth cover with a large upper and a small lower diameter. Similar to the outer diameter of the cage frame, the lower part of the cloth cover gradually shrinks and is gathered in the cloth bag tensioning slider 3.
  • An upper elastic ring 9 and a lower elastic ring 10 are wrapped around one end of the cloth bag 1, and the upper elastic ring 9 and the lower elastic ring 10 form an embedding groove for inserting into the separator 5 of the bag filter, referring to FIG. 6,
  • the distance between the upper elastic ring 9 and the lower elastic ring 10 is greater than the thickness of the separator 5 of the bag filter by 2 to 3 mm.
  • a flange is provided on the skeleton pressing sleeve 6, and the upper elastic ring 9 is located under the flange, and the upper elastic ring 9 can be covered under the flange as shown in FIG. 1 or FIG. 6.
  • the other end of the cloth bag 1 is tied to the cloth bag tensioning slider 3 by a temperature-resistant cord 11, and a circular groove is provided on the cloth bag tensioning slider 3, and the temperature-resistant cord 11 is embedded in the circular groove.
  • a bolt 12 is provided on the cloth bag tensioning slider 3, and a through hole is provided on the cohesive connector 4. After the bolt 12 passes through the through hole, the nut 7 is screwed, and the nut 7 is rotated to adjust the For the clamping force of one end of the V-shaped steel circle 2 on the cloth bag tensioning slider 3 and the cloth bag, referring to FIG.
  • the assembly of the filter bag of the present invention is as follows: (1) The upper elastic ring and the lower elastic ring are sewn into the upper port of the filter bag with a temperature-resistant cord, and the distance between the upper and lower elastic rings is greater than the thickness of the separator of the bag filter; (2) The bottom of the filter bag is tied to the cloth bag tensioning slider with a temperature-resistant rope, and the temperature-resistant rope is embedded in the groove of the tensioning slider; (3) The filter bag is sleeved on the filter bag cage made of V-shaped round steel; 4) Pass the upper bolts of the cloth bag tensioning slider with the filter bag through the cohesive connector, and use the nut to connect the bottom of the filter bag to the cohesive connector through the bag tensioning slider; (5) Sewing the upper After the upper port of the filter bag of the elastic ring and the lower elastic ring is deformed, they will be stuck in the corresponding hole on the separator of the bag filter; (6) Press the frame cover at the upper end of the filter bag cage downward to make the upper elastic ring Press in
  • the invention can increase the collection area per unit volume, thereby reducing the manufacturing, installation and civil construction costs of the entire bag filter equipment, and at the same time strengthen the dust removal effect and the uniformity of the filter bag dust removal, and is particularly suitable for the collection of easily hygroscopic dust and high Dust removal of wet flue gas.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

一种内通道可变的袋底增强式滤袋清灰方法及过滤装置，用于强化滤袋清灰。方法：将清灰气流通入内通道的横截面积沿滤袋开口至滤袋底部方向减小的滤袋，流向滤袋底部中，不断减小滤袋内通道横截面积使滤袋持续压缩清灰气流并提高清灰气流冲击压力和冲击速度。装置包括笼骨架及骨架压套，在笼骨架的外部套设有布袋且布袋与笼骨架贴合，笼骨架包括内聚连接件和至少3根V形钢园，一端固定于内聚连接件并形成锥形向内凹陷腔体，另一端收拢于骨架压套内，在锥形向内凹陷腔体内设有布袋张紧滑块，布袋的一端套在骨架压套上，另一端收拢于布袋张紧滑块，随布袋张紧滑块嵌入锥形向内凹陷腔体并由所述V形钢园的一端固紧。

Description

一种内通道可变的袋底增强式滤袋清灰方法及过滤装置 技术领域
本发明涉及一种用于袋式除尘器的内通道可变的袋底增强式滤袋清灰方法及过滤装置，可增强清灰效果和均匀性，提高单位体积滤袋面积，降低袋式除尘器占地面积和制造成本。
背景技术
袋式除尘器是烟气颗粒物治理的主要以及关键设备，工业应用已有近百年历史，需求量极大，提高单位体积捕集面积、增强清灰效果等方面的改进会产生较大的社会经济效益。
现有袋式除尘器绝大部分采用的是脉冲清灰，也有少量的大气反吹清灰，两者清灰方式均是利用清灰气流，它的作用主要是改变了正常运行状态，造成滤袋内瞬时正压和抖动，滤袋外粉尘脱落，实现清灰。影响清灰效果的主要因素有两点：(1)清灰时滤袋内压力峰值，它与单位滤袋内通道截面积的清灰气流量有关，对于一定量的清灰气流量，滤袋内通道截面积越小，压力峰值越大，清灰效果越好；(2)滤袋内压力上升速度与清灰气流轴向速度成正相关，清灰气流轴向速度越大，滤袋内压力上升速度越大，清灰效果越好。
然而现有的袋式除尘器滤袋及笼骨架，基本都采用直筒式，如图(7)所示，这样的结构形式存在以下问题：
(1)由于滤袋是直筒形式，上下截面积相同，清灰气流引入后，滤袋内上部分清灰气流轴向速度较大，轴向向下运动时，一部分清灰气流穿过滤袋，清灰气流量降低，清灰气流轴向速度减少，滤袋内压力上升速度降低，滤袋底部清灰效果比中部差。并且滤袋下部清灰气流量少，而滤袋内通道截面积没有变化，造成滤袋内压力峰值下降，特别在颗粒物易吸湿、烟气含湿量大以及滤袋长度大等情况下，底部清灰效果较差。例如，用于垃圾焚烧烟气处理的长滤袋袋式除尘器，烟气湿含量大，滤袋底部经常出现颗粒物糊死滤袋现象，影响除尘效果及设备的正常运行。
(2)一般袋式除尘器滤袋过滤面积很大，袋式除尘器的设备制造成本、安装及土建成本较高，现有滤袋是直筒形式，滤袋内体积空间还比较大，没有利用起来，白白浪费。
发明内容
本发明提供一种用于袋式除尘器的内通道可变的袋底增强式滤袋清灰方法及过滤装置，本发明能够强化滤袋清灰效果，尤其是能够有效改善滤筒沿长度方向的侧壁压力峰值分布的均匀性，保证滤袋各部分具有相同的清灰强度。
本发明与如下技术方案：
本发明所述的一种内通道可变的袋底增强式滤袋清灰方法：取一滤袋并使清灰气流流经的滤袋袋内的内通道可变，所述内通道可变是使内通道的横截面积沿滤袋开口至滤袋底部方向减小，清灰气流进入滤袋并流向滤袋底部的过程 中，不断减小滤袋内通道横截面积使滤袋持续压缩清灰气流并提高清灰气流冲击压力和冲击速度，强化了滤袋底部的清灰，使粘结于滤袋底部的粉尘颗粒得以清除。
本发明所述的一种所述内通道可变的袋底增强式滤袋清灰方法的过滤装置，包括笼骨架及骨架压套，在笼骨架的外部套设有布袋且所述布袋与笼骨架贴合，所述笼骨架包括内聚连接件和至少3根V形钢园，V形钢园的一端固定于内聚连接件并围合形成一锥形向内凹陷腔体，V形钢园的另一端收拢于所述骨架压套内，在所述锥形向内凹陷腔体内设有可拆卸的布袋张紧滑块，所述布袋的一端套在骨架压套上，布袋的另一端收拢于布袋张紧滑块，随布袋张紧滑块嵌入锥形向内凹陷腔体并由所述V形钢园的一端固紧。
有益效果：与现有技术相比，本发明具有以下优点：
针对现有技术在袋式除尘器滤袋的清灰气流清灰过程中，清灰气流沿其流向(即流向滤袋底部)的气流强度变弱、冲击变缓、冲击速度下降的问题，本发明采用内通道的横截面积沿滤袋开口至滤袋底部方向减小的技术措施，利用其逐渐变小的滤袋，对流向滤袋底部的清灰气流实施压缩，保持甚至提高气流冲击强度和冲击速度，使得牢固附着于滤袋下部的高粘稠颗粒物得以清除。
(1)W形滤袋及笼骨架，如图(9)所示，在笼骨架内外部均设置了滤袋捕集面，滤袋内通道下部截面积减少，在清灰气流引入时，提高了滤袋底部清灰气流轴向速度以及单位滤袋内通道截面积的清灰气流量，滤袋底部内压力峰值及压力上升速度均得到提升，增强了滤袋底部的清灰效果，可用于特长形滤袋及清灰难度大的颗粒物的捕集。在烟气干燥污泥的项目中应用表明：在颗粒物易吸湿、烟气含湿量大的情况下，底部清灰效果仍然较好。
(2)在笼骨架内外部均设置了滤袋捕集面，使得单位体积的滤袋面积提高50％以上，对于相同处理烟气量，袋式除尘器体积降低50％以上，减少了设备占地面积以及袋式除尘器的设备制造、安装成本。
(3)采用V形钢园并将其一端固定于内聚连接件，另一端收拢于骨架压套的V形钢园，形成沿滤袋开口至滤袋底部方向内通道截面积逐步减小即上大下小的滤袋，并利用上大下小滤袋对清灰气流进行增压、提速，从而强化了袋式除尘器滤袋的清灰效果。采用V形钢园还可以形成W形滤袋及笼骨架，在滤袋内部设置了捕集面，改变了滤袋内通道截面积，减少了下部内通道截面积，提高了滤袋内压力上升速度。
附图说明
图1为本发明结构示意图。
图2为图1中K-K剖面图。
图3为图1中G-G剖面图。
图4为图1中F-F剖面图。
图5为图1中E处的放大图。
图6为图1中C处的放大图。
图7为图6中H-H剖面图。
图8为现有滤袋与笼骨架示意及清灰气流流场图。
图9为本发明滤袋与笼骨架示意及清灰气流流场图，其中，箭头表示清灰气流方向。
图中：1—布袋，2—V形钢园，3—布袋张紧滑块，4—内聚连接件，5—袋 式除尘器隔板，6—骨架压套，7—螺母，8—反牙螺母，9—上弹性圈，10—下弹性圈，11—耐温绳，12—螺栓。
具体实施方式
以下结合附图对本发明介绍具体实施方式和具有的收益效果，旨在帮助阅读者更好的理解本发明的实质和精神所在，但不能构成对本发明实施范围的限定。
实施例1
一种内通道可变的袋底增强式滤袋清灰方法：取一滤袋并使清灰气流流经的滤袋袋内的内通道可变，所述内通道可变是使内通道的横截面积沿滤袋开口至滤袋底部方向减小，清灰气流进入滤袋并流向滤袋底部的过程中，不断减小滤袋内通道横截面积使滤袋持续压缩清灰气流并提高清灰气流冲击压力和冲击速度，强化了滤袋底部的清灰，使粘结于滤袋底部的粉尘颗粒得以清除。
在本实施例中，滤袋采用轴向界面为W形状的W形滤袋并利用上大下小的W形滤袋对冲向其底部的清灰气流实施压缩，强化清灰气流对滤袋下部的冲击，迫使粘结于滤袋下部的粉尘颗粒脱落。
实施例2
一种所述内通道可变的袋底增强式滤袋清灰方法的过滤装置，包括笼骨架及骨架压套6，在笼骨架的外部套设有布袋且所述布袋1与笼骨架贴合，所述笼骨架包括内聚连接件4和至少3根V形钢园2，V形钢园2的一端固定于内聚连接件4并围合形成一锥形向内凹陷腔体，参照图5，具体可以将V形钢园2的一端焊接在内聚连接件4的D处，V形钢园2的另一端收拢于所述骨架压套6内，参照图6，具体可以将V形钢园2的另一端焊接在骨架压套6的C处，在所述锥形向内凹陷腔体内设有可拆卸的布袋张紧滑块3，所述布袋1的一端套在骨架压套6上，布袋1的另一端收拢于布袋张紧滑块3，随布袋张紧滑块3嵌入锥形向内凹陷腔体并由所述V形钢园2的一端固紧。其中，所述布袋1与笼骨架贴合意味着布袋1很好的包覆在笼骨架上，其具体实施方式之一可以是将布袋1涉及成上大下小的布套，布套的内径与笼骨架的外径相仿，布套的下部逐渐收缩并收拢于布袋张紧滑块3。
在本实施例中，
V形钢园2的总根数为2N，N为自然数且N>1，例如：N＝2、3、4、5、6、……，V形钢园2的一端均布且固定于内聚连接件4，V形钢园2的另一端均布且固定于所述骨架压套6内，由此形成W形滤袋的骨架，其笼骨架也呈W形，W形笼骨架横截面形状一般为园形、椭圆形或梯形。
所述布袋1的一端翻边包裹有上弹性圈9和下弹性圈10，并由上弹性圈9与下弹性圈10构成用于嵌入袋式除尘器隔板5的嵌入槽，参照图6，在A、B处用高强度耐温线缝制，使上弹性圈9和下弹性圈10被包裹固定或连接，将袋式除尘器隔板5固定在上弹性圈9和下弹性圈10之间，上弹性圈9和下弹性圈10间距大于袋式除尘器隔板5的厚度2～3mm。
在骨架压套6上设有凸缘，所述上弹性圈9位于所述凸缘下，可以如图1或图6所示的将上弹性圈9罩在所述凸缘下面。
所述布袋1的另一端通过耐温绳11捆于布袋张紧滑块3上，在布袋张紧滑块3上设有园槽，所述耐温绳11嵌入园槽内。
在布袋张紧滑块3上设有螺栓12，在内聚连接件4上设有通孔，所述螺栓12穿过所述通孔后螺纹连接螺母7，旋转所述螺母7以调整所述V形钢园2的 一端对布袋张紧滑块3及布袋的夹紧力，参照图5，螺母7上设置反牙螺母8，螺母7与反牙螺母8并紧。
本发明所述滤袋的装配如下：(1)采用耐温绳将上弹性圈及下弹性圈缝制在滤袋上部端口内，上下弹性圈间距大于袋式除尘器隔板厚度；(2)将滤袋底部通过耐温绳捆于布袋张紧滑块上，耐温绳嵌入张紧滑块园槽内；(3)将滤袋套入V形圆钢组成的滤袋笼骨上；(4)将系有滤袋的布袋张紧滑块上端螺栓穿过内聚连接件，用螺母将滤袋底部通过布袋张紧滑块连在内聚连接件上；(5)将缝制有上弹性圈及下弹性圈的滤袋上部端口变形后，卡在袋式除尘器隔板上所对应的孔内；(6)将滤袋笼骨上端的骨架压盖向下用力，使得上弹性圈压在骨架压盖内，并且骨架压盖贴在袋式除尘器隔板上；(7)通过滤袋上端口，将连在穿过内聚连接件的布袋张紧滑块上端螺栓的螺母旋紧，即将滤袋拉紧，再在布袋张紧滑块上端螺栓上装一反牙螺母，以防滤袋工作时螺母松动。
本发明可提高单位体积捕集面积，从而降低整个袋式除尘器设备制造、安装及土建成本，同时强化清灰效果及滤袋清灰的均匀性，特别适合于易吸湿粉尘的捕集以及高湿烟气的除尘。
以上对本发明创造进行了详细说明，所述内容仅为本发明创造的较佳实施例，不能被认为用于限定本发明创造的实施范围。凡依本发明创造申请范围所做的均等变化与改进等，均应仍归属于本发明创造的专利涵盖范围之内。

Claims (8)

  1. 一种内通道可变的袋底增强式滤袋清灰方法，其特征在于，取一滤袋并使清灰气流流经的滤袋袋内的内通道可变，所述内通道可变是使内通道的横截面积沿滤袋开口至滤袋底部方向减小，清灰气流进入滤袋并流向滤袋底部的过程中，不断减小滤袋内通道横截面积使滤袋持续压缩清灰气流并提高清灰气流冲击压力和冲击速度，强化了滤袋底部的清灰，使粘结于滤袋底部的粉尘颗粒得以清除。
  2. 根据权利要求1所述的内通道可变的袋底增强式滤袋清灰方法，其特征在于，滤袋采用轴向界面为W形状的W形滤袋并利用上大下小的W形滤袋对冲向其底部的清灰气流实施压缩，强化清灰气流对滤袋下部的冲击，迫使粘结于滤袋下部的粉尘颗粒脱落。
  3. 一种用于权利要求1所述内通道可变的袋底增强式滤袋清灰方法的过滤装置，其特征在于，包括笼骨架及骨架压套(6)，在笼骨架的外部套设有布袋且所述布袋(1)与笼骨架贴合，所述笼骨架包括内聚连接件(4)和至少3根V形钢园(2)，V形钢园(2)的一端固定于内聚连接件(4)并围合形成一锥形向内凹陷腔体，V形钢园(2)的另一端收拢于所述骨架压套(6)内，在所述锥形向内凹陷腔体内设有可拆卸的布袋张紧滑块(3)，所述布袋(1)的一端套在骨架压套(6)上，布袋(1)的另一端收拢于布袋张紧滑块(3)，随布袋张紧滑块(3)嵌入锥形向内凹陷腔体并由所述V形钢园(2)的一端固紧。
  4. 根据权利要求3所述的过滤装置，其特征在于，V形钢园(2)的总根数为2N，N为自然数且N>1，V形钢园(2)的一端均布且固定于内聚连接件(4)，V形钢园(2)的另一端均布且固定于所述骨架压套(6)内，由此形成W形滤袋的骨架。
  5. 根据权利要求3或4所述的过滤装置，其特征在于，所述布袋(1)的一端翻边包裹有上弹性圈(9)和下弹性圈(10)，并由上弹性圈(9)与下弹性圈(10)构成用于嵌入袋式除尘器隔板(5)的嵌入槽。
  6. 根据权利要求5所述的滤袋，其特征在于，在骨架压套(6)上设有凸缘，所述上弹性圈(9)位于所述凸缘下。
  7. 根据权利要求3或4所述的过滤装置，其特征在于，所述布袋(1)的另一端通过耐温绳(11)捆于布袋张紧滑块(3)上，在布袋张紧滑块(3)上设有凹槽，所述耐温绳(11)嵌入凹槽内。
  8. 根据权利要求3、4或7所述的过滤装置，其特征在于，在布袋张紧滑块(3)上设有螺栓(12)，在内聚连接件(4)上设有通孔，所述螺栓(12)穿过所述通孔后螺纹连接螺母(7)，旋转所述螺母(7)以调整所述V形钢园(2)的一端对布袋张紧滑块(3)及布袋的夹紧力。
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