​Analysis of sealing property of bag filter

Bag filters are a series of suspended filter bags made from polypropylene or polyethylene filter cloth, similar to electroplated anode bags, but much larger. It is a kind of pressure filter device, mainly composed of filter cylinder, filter cylinder cover and filter basket and other main components, using the side into the bottom out way, through the pressure in the pipeline will filter the liquid medium into or pumped into the filter cylinder, to filter the liquid medium through the support of the filter basket to filter the filter bag, produce the ideal solid-liquid separation to achieve the effect of liquid medium is filtered. Different filtration accuracy depends on the filter bag of different precision.

Its big advantage is energy saving, which is in line with the basic needs of today's equipment, it can work in a closed environment, and can be applied to different jobs. If you look at the system, you can see that the filter bag has a very special structure, and there is also a supporting body, which is a metal net. During use, the liquid flows in and out through the inlet and outlet, with a filtration process in between so that impurities are removed.

For people who use bag filters, a common problem is that filtrate comes out of the gap between the filter plate and the filter plate (that is, the filter chamber can not be sealed), and then affects the filter quality and power. When encountering such application problems, we can deal with them from the following reasons:

1. Incorrect placement of press cloth

There are many reasons why the filter chamber cannot be sealed. We need to start from a simple point of view. We need to coil around the filter chamber to see whether the filter cloth is wrinkled or damaged along the edge of the filter cloth. Because the structure of the filter chamber is made of filter plate and filter cloth cutting each other, the general filter plate has no problems, the remaining is the filter cloth. Between the consolidation of the filter plate to form a seal, play a key role in the filter cloth, the crease or damage of the filter cloth is simply formed between the filter plate there is a gap, the filter chamber will not constitute a seal.

2. Lack of pressure

The filter plate and the filter cloth should be under pressure to complete the closed filter chamber structure. When the pressure is lack, the pressure applied to the filter plate is less than the pressure of the filtrate, the filtrate will not move to the bottom can be exposed from the gap.

3. bag filter deformation or damage

When the edge of the filter plate is damaged, even if the slight bulge, even if one side is often worn, the same contact with other filter plates, no matter what kind of pressure, the filtration chamber will be exposed. According to the situation of the leakage point to distinguish, because the filter plate damage constitutes the disclosure generally will be relatively large, there may be eruption.