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Bag Filter Daily Use And Maintenance
- May 27, 2017 -

First, the principle of bag filter system

Bag filter is a new type of filtration system, the filter inside the metal mesh by supporting the filter bag, the liquid flow from the entrance, filtered by the filter bag after the outflow of impurities were intercepted in the filter bag. The filter bag can be replaced or cleaned after use.

Second, the installation

Ready to warn: After opening the lid, the falling lid will hurt.

1. First, make sure that the accessories required to install the bag filter system are ready:

① bag filter main body ② Ο type ring

③ metal network ④ filter bag ⑤ pressure gauge only 1

2, check the Ο type seal and the filter on the Ο type slot, if the Ο-type ring deformation, scratches or rupture, or Ο-type seal joint parts of the problem, please replace the new accessories.

When installing the installation, follow these steps:

1, the bag filter placed in the need to filter the station, connected to the import and export flange or tube, to be fixed; boring plug exhaust, or configure the exhaust valve. Jacketed connection heat source.

2, the metal net gently into the bag filter, so that the net collar and bag filter mouth anastomosis.

3, put the filter bag, so that the mouth of the filter bag and metal mesh collar anastomosis. Note: If you are using the sewing bag, please filter bag sewing edge folded into, can improve the filter bag filter effect.

4, the Ο type seal into the Ο type groove, Ο type ring can not be twisted or deformed, multi-bag filter button on the bag pressure ring.

5, one hand holding the cover handle, one hand to seize the other end of the cover (multi-bag filter turn the top hand wheel), the cover against the bag filter mouth, slowly down, naturally flat pressure on the type Circle and filter bag on the mouth.

6, the top of the cover, while tightening the diagonal of the two hats, all the hats one by one tightening (with a short stick into the rings twist).

7. Close the exhaust valve installed at the top of the bag filter.

8, please check the connection pipe is solid; work pressure is within the allowable range.

9, open the output valve. Open the heat source into the valve, so that the filter temperature rises to the specified temperature.

10, long open the input valve, so that the liquid slowly into and fill the filter, to prevent the liquid suddenly impact filter bag, causing rupture, and then observe whether the leak. If there is no leakage, you can start filtering.

Second, daily use and maintenance

First, daily use

Work in the filtration system to always check the import and export pressure difference, when the pressure difference to 0.05-0.1Mpa, should be promptly replaced filter bag, so as not to pressure over the filter bag rupture and support network damage.

Second, the correct open filter after the filter cover

WARNING: Do not open the lid with pressure in the bag filter, otherwise the remaining liquid may be ejected and cause liquid loss and personal injury.

So please strictly follow the following sequence:

1, closed input valve; outlet pressure, close the output valve.

2, to confirm the exhaust valve connected to the pipeline has been received after the safety or suction port (in the filtration of toxic and corrosive liquids should pay attention), and then open the exhaust valve to prevent the liquid on the staff and the surrounding environment damage and Pollution.

3, check the pressure gauge to determine the internal pressure is 0, then the bag filter should be separated from the pipeline system.

4, a drain valve, to confirm the discharge of liquid received to the recycling office, open the drain valve; to the bag filter in the remaining liquid flow through the drain valve, close the drain valve. This discharge can be done in a pressurized manner (please refer to the pressurized discharge process).

5, unscrew the cover cap, lift the cover, multi-bag filter to turn a certain angle.

Third, replace the filter bag

1, high efficiency filter bag is made of fine fibers, these materials are weak hydrophilic. The surface of the fiber will not be wet with water, so as the use of the same material using the same filter, before use, have to use other low surface tension of the liquid it moist. Before installation, you must immerse the filter bag in a pre-wetting solution that matches the filter fluid for several minutes.

2, open the bag filter cover.

3, will be stable on the cover, the filter bag carefully removed.

4, into the new filter bag, please refer to the installation process.

Fourth, monitoring the quality of filtration

In the case of liquid input pressure stability, the filter quality and filter bag pressure difference is closely related, if the pressure is too large, indicating that the filter bag filter pore is blocked, the filtration rate decreased. Therefore, we recommend that when the bag filter began to work, should regularly check the pressure, through the pressure gauge before and after the pressure difference to determine the time to replace the filter bag, the general filter bag can withstand the pressure of 0.5-1Kg / cm2 (0.05 -0.1Mpa) or so, when the pressure reaches this range, the filter bag should be replaced in time to avoid cracking bag, affecting the filtering effect.