Installation and replacement of filter bag of the bag filter method

installation and replacement of filter bag of the bag filter method


bag filter is a kind of filter is commonly used in water treatment equipment, the core of filter is the filter bag, filter bag and filter, to a certain amount of time has to be replaced, it also has the life, so in order to guarantee the filtering effect, we will filter bag for replacement of filters, that how to replace the bag filter in the filter bag, small butterfly below to introduce the filter bag to replace some of the ways.

change the filter bag

1) Efficient filter bag is a fine fiber is made, the material of hydrophilicity is weaker. Fiber surface will not be wet water, so like other filter using the same materials, before use, with some low surface tension of the liquid it moist. Before installation, you must immerse filter bag and filter liquid matching prewetting in a few minutes.

2） Open the bag filter machine cover.

3） Will be put on the cover, remove the filter bag carefully.

4） Add a new filter bag, please refer to the installation process. Installation



when installation, please complete the following steps to work

1, place the bag filter in filtering on the location of connecting flange or tube teeth, import and export and fixed; Exhaust valve MenDu vent, or configuration. Clip model connection heat preservation heat source.

2, will gently into the internal metal net, bag filter, mouth make Intranet neckline and bag filter.

3, place the filter bag, filter bag mouth ring and metal collar.

4, will & Omicron; Type sealing ring in & Omicron; Type slot, & Omicron; Type sealing ring cannot be distorted or deformation, bag filter filter bag pressure ring on the buckle.

5, holding the lid handle, grabbing at the other end of the cover ( The top of the bag filter rotation handwheel)

6, cover alignment, and tighten the two diagonal lifting cap, will tighten all the lifting cap ( Twisted) with short stick inserted within the rings 。

7, shut the exhaust valve installed on the top of the bag filter.

8, please check the connection pipe is strong; Working pressure is within the scope of the permit.

9 output, open the valve. Open the heat source into the valve, filter temperature rise to a specified temperature.

10, slowly open the input valve, let the liquid flowing and filter, prevent sudden shock liquid filter bag, rupture, and then observe the leaks. If not leak, filtering can begin.

filter bag block and its coping methods

( 1) Filter bag of congestion is the main reason is that high filtration velocity, dust carefully, a sticky dust, filter bag dust, filter bag bag, condensation and harden. Run if filter filtration wind speed in excess of the filter bag design standards, is easy to lead to fine dust in the flue gas into the filter bag inside fiber, filter bag jam resistance increases. The effect of filter material, filter material or coating on the surface of filter bag do precoating gray processing, is a good method. For dust big viscosity, you need to reduce the filtration velocity, or increasing injection pressure pulse, or with the method of off-line pulse dust filter bag, but a better method is to increase the filter area, reduce the filtration velocity, prolong the service life of filter bag.

（ 2) Filter bag dust bad mainly including soot 'frequent, soot cleaning time is too long. Clear grey number frequency, slag discharge pressure makes the fiber filter bag loosely organized so as to increase the fine in flue gas dust jam filter bag. Soot cleaning time is too long will be the initial powder layer on the surface of the filter bag cleaning off, along with all the falling filter bag filtration precision. If time is too short, clear ash on the surface of the filter bag dust is not entirely clear ash clean, immediately began to filter, dust accumulated on the surface of filter bag, filter bag caused by the blockage, to solve this problem, can adjust the blowing through several commissioning after control instrument.

（ 3) Water filter bag is the biggest cause of blockage, the cause of containing water usually occurs at low temperature condensation, especially in the treatment of high temperature flue gas, to such a situation can adopt the following methods to prevent avoid improper boot; Avoid resistance when the big boot in filter; The boot is lower than the dew point. Filter in run below the dew point, prone to problems, if the intake distribution uneven, easy to cause filter shell localized corrosion, therefore, should avoid dust catcher work below the dew point. Should be used if the inevitable cold boot, heat preservation device, such as steam heating or electric heating heat.

（ 4) Air infiltration. Flange of air infiltration often occurred in the filter, the access door, or the activities of the dust collector device, if the seal is lax, outside air into the filter, when dealing with high temperature flue gas, can produce low temperature inside the filter area, resulting in low temperature ChuJie dew, corrosion filter, filter bag paste bag or harden.
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