polyester fiberCentrifugal filter bagAlso known as filter cloth, filter bag, etc., it is the filtering medium of a centrifuge. The centrifuge rotates, and the liquid seeps through the filter cloth and flows out of the machine. Solid substances are trapped on the filter cloth. After stopping the machine, the solid substances on the filter cloth are removed and placed back in the filter cloth for the next dehydration process. The material of the filter bag is generally polypropylene, with a mesh size between 500-1000.

The filter bag is placed inside the centrifuge liner. When the machine is running, the moisture in the material permeates through the filter bag and flows out of the machine, while the solid material is trapped on the filter bag. After the machine stops, remove the material from the filter bag to complete a dehydration process.

1. Before installation, it is necessary to check whether the interface of the centrifuge and the specifications and models of the filter bags that need to be installed are consistent, and to check for any quality defects.
2. The filter bag should be used together with the support net and should be tightly attached to the inner wall of the support net.
3. When the pressure difference between the upstream and downstream of the filter bag is 1-1.5kg/cm ², the filter bag needs to be cleaned or replaced.
4. Pre wet the filter bag for a few minutes before use to effectively reduce initial pressure loss.

1. Gas cleaning, with the help of high-pressure gas or external atmosphere, can blow back the filter bag to clean the accumulated dust on the filter bag.
2. Mechanical vibration cleaning, using a mechanical vibration device to periodically and alternately vibrate each row of filter bags to clean the accumulated dust on the filter bags.
3. Patting the filter bag by hand can also clean the accumulated dust on the filter bag.

The fabric and design of filter bags should strive for effective filtration, easy dust removal, and durability. The main materials for centrifuge filter bags on the market are non-woven fabric series, including woven fabric, PE polyester, polypropylene 621, PP polypropylene, etc. Choose the appropriate diameter based on the size and specifications of the centrifuge.
The calculated parameters include door width, height, cap diameter, cap height, and diameter of the liquid interception port. When choosing to purchase, one should consider acid and alkali resistance as well as durability; The chemical composition will directly affect the filtration effect. Before operation, it is necessary to have a good estimation of the acidity and alkalinity of the material.

1. Choose a suitable mesh filter bag based on the coarse line condition of the material. If the mesh size of the filter bag is too small, the material is prone to material leakage during the separation process, which cannot achieve the effect of solid-liquid separation; If the mesh size of the filter bag is too large, the permeability of the material will decrease, making it difficult to separate and potentially leading to high moisture content and reduced separation efficiency. So only filter bags with appropriate mesh size can have good separation effect.
2. According to the size of the centrifuge drum, process and manufacture suitable filter bags. On one hand, the filter bags processed by inexperienced manufacturers on the market are the same size as the drum, and during separation, the filter bags are easily stretched and broken due to centrifugal force, which reduces the separation effect.