Bag filter manual

I. Introduction bag filter bag filter system theory is a new filtration system,

The inside of the filter is supported by a metal inner mesh. The liquid flows in from the inlet, passes through the filter bag and flows out, and the impurities are intercepted in the filter bag, as shown in the right figure. The filter bag can be replaced or cleaned before use.

Second, the installation ready Warning: After opening the lid, the lid will fall hurt the hand.

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

1 bag filter body 2 ÎŸ type seal ring 3 metal inner net 4 filter bag 5 pressure gauge two (optional)

2. Check the å¯†å°-type seal ring and the ÎŸ-shaped groove on the filter machine. If the å¯†å°-type seal ring is deformed, there is scratch or crack, or there is a problem with the joint of the ÎŸ-type seal ring, please replace the new one.

When installing and installing, please follow the steps below:

1. Place the bag filter on the station to be filtered, connect it to the inlet and outlet flanges or the tube, and fix it; stuff the exhaust port or configure the exhaust valve. Jacket type connection insulation heat source.

2. Gently put the metal inner mesh into the bag filter to make the inner mesh neckline match the bag filter.

3. Place the filter bag so that the ring of the filter bag matches the neckline of the metal inner net. Note: If you are using a sewn filter bag, fold the sewn edge of the filter bag and insert it to improve the filtering effect of the sewn filter bag.

4. Put the å¯†å°-type sealing ring into the ÎŸ-shaped groove, the ÎŸ-type sealing ring can not be twisted or deformed, and the multi-bag filter machine is fastened with the filter bag pressure ring.

5. Hold the handle of the upper cover with one hand, grasp the other end of the upper cover with one hand (turn the top handwheel with the multi-bag filter), align the upper cover with the mouth of the bag filter, slowly put it down, and naturally press it against the ÎŸ-type seal. Ring and filter bag ring mouth.

6. After the upper cover is aligned, tighten the two hanging caps at the same time and tighten all the caps one by one (inserted into the rings with a short stick).

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

8. Please check whether the connection pipes are firm; whether the working pressure is within the allowable range.

9. Open the output valve. Open the heat source inlet valve, which is the filter temperature rises to the specified temperature.

10. Open the input valve slowly, let the liquid slowly flow in and fill the filter to prevent the liquid from suddenly impacting the filter bag, causing cracking, and then observe whether there is any leakage. If no leaks occur, you can start filtering.

Third, the daily use and maintenance 1, daily use work filtration system must always check the import and export pressure difference when the pressure difference reaches 0.05-0.1Mpa, the bag should be replaced to avoid excessive pressure The ambassador filter bag broke and the support mesh was damaged.

2. Open the filtered filter cover correctly.

Warning: Do not open the cover under pressure in the bag filter, otherwise the remaining liquid may be ejected and cause fluid loss and personal injury.
Therefore, please strictly follow the sequence below:
(1) Closed input valve; when there is pressure at the outlet, close the output valve.
(2) Confirm that the pipe connected to the exhaust valve has been connected to the safety or suction port (except when filtering toxic and corrosive liquids), then open the exhaust valve to prevent the liquid from harming the workers and the surrounding environment. And pollution.
(3) Check the pressure gauge to determine that the internal pressure is 0. At this time, the bag filter should be separated from the piping system.
(4) If there is a drain valve, confirm that the drain liquid is connected to the recovery point and open the drain valve; the remaining liquid in the bag filter is drained through the drain valve, and the drain valve is closed. This discharge can be done in a pressurized manner (please refer to the pressurized discharge process).
(5) Unscrew the upper cover and lift the upper cover. The multi-bag filter needs to be rotated through a certain angle.

Fourth, replace the filter bag

1. High-efficiency filter bags are made of fine fibers, which are less hydrophilic. The surface of the fiber is not wetted by water, so as with other filter elements that use the same material, it is wetted with other liquids with a lower surface tension before use. Before installation, you must immerse the filter bag in the pre-wetting solution that matches the filtered liquid for a few minutes.

2. Open the top cover of the bag filter.

3. Stabilize the top cover and carefully remove the filter bag.

4. Put in a new filter bag, please refer to the installation process.

V. Monitoring and filtering quality

When the liquid input pressure is stable, the filtration quality is closely related to the pressure difference in the filter bag.

If the pressure difference is too large, the filter pore size of the filter bag is blocked and the filtration speed is lowered. Therefore, we recommend that when the bag filter starts working, the pressure difference should be checked regularly, and the pressure difference displayed by the front and rear pressure gauges should be used to determine the time to replace the filter bag. Generally, the filter bag can withstand a pressure of 0.5-1Kg/cm2 (0.05- About 0.1Mpa), when the pressure difference reaches this interval, the filter bag should be replaced in time to avoid the filter bag from rupturing and affecting the filtration effect.

If the pressure differential drops suddenly, stop the filtration immediately and check for leaks.

Sixth, the pressurized liquid discharged left when filtering high-viscosity liquids, can pass into the air by the exhaust valve, the acceleration residual liquid discharge, shorten the waiting time. Its device is shown in the figure. Please note: The air used for pressurized discharge must be stable and the pressure should not exceed the working pressure of the filter.

The steps are as follows:

1. Close the input valve.

2. Open the intake valve.

3. The gas is introduced into the bag filter to pressurize the remaining liquid.

4. Check the outlet pressure gauge to verify that the gauge pressure is equal to the compressed air pressure; verify that no liquid is flowing out of the outlet.

5. Close the intake valve.

6. Slowly open the exhaust valve; the outlet of the exhaust valve has a residual liquid that must be directed to a safe place or filter suction port.

7. When the compressed air is exhausted, close the exhaust valve. At this point, there should be no pressure inside the filter, and the cover can be opened.

Seven cleaning bag filter bag filter filtration if they continue the same kind of liquid, it does not need cleaning. However, if other types of liquid are filtered, it is necessary to clean the machine before use.

Eight, ÎŸ-ring maintenance and replacement maintenance: When using ÎŸ ÎŸ-ring-groove to be aligned into, to avoid undue compression causes ÎŸ-ring deformation; when not filtered, ÎŸ The sealing ring must be removed and wiped clean, otherwise the residual liquid will adhere to its surface after solidification, resulting in hardening and poor sealing.

Replace: If the å¯†å°-type seal is aging or damaged, please replace it in time. The same type of å¯†å°-type seal should be selected for replacement.

Special statement: 1. Under normal use, the filter and support net are guaranteed for one year. If the damage is caused by improper use, it is not covered by the warranty.

2, the standard bag filter zui design pressure is 1.0Mpa, recommended zui large working pressure is 0.5Mpa except for special specifications.

3, bag-type jacket filter jacket inside the Zui design pressure is 1.0Mpa, Zui big push its recommended working pressure is 0.6Mpa.

4. The design pressure of the multi-bag filter is 1.0Mpa, and the recommended working pressure of Zui is 0.6Mpa.

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Posted on January 22, 2021