Introduction to high-pressure membrane filter press

 The high-pressure membrane filter press is an intermittent pressurized filtration equipment, used for filtration of various media, with good filtration effect and low moisture content of the filter cake. The high-pressure membrane filter press adopts a building block structure. Each part has a reasonable structure and simple connection. It can be used in different combinations to meet the requirements of different users. The whole machine has the characteristics of high degree of automation, large production capacity, the ability to operate under high pressure, low liquid content of filter cake, high unit output, and small floor space: its use effect is comparable to that of imported filter presses.

1.filter effect

As a solid-liquid separation equipment in sewage treatment, filter press has a high usage rate. In most cases, ordinary chamber filter press can meet the demand. But there is another situation where a high-pressure membrane filter press can be used when the moisture content of the mud cake is high. Compared with ordinary chamber filter presses, high-pressure membrane filter presses are resistant to high pressure and have higher dehydration rates. The mud cake produced after filtration by ordinary chamber filter press is much drier. The moisture content of the filter cake after filtration is generally around 60%-65% (sometimes it can reach 40-45% depending on the industry and process).

2.working principle

With the assistance of the feed pump, the filter press inputs the filtered material into the filter chamber of the filter press, and then passes through the filter cloth outside the filter chamber (generally the filter cloth can only allow liquid and very small solid particles to pass). It seeps out, and the solids are intercepted on the filter cloth, thus completing the filtration effect of a general filter press.

The characteristic of the membrane filter press is that it can perform secondary pressing to further reduce the moisture content of the filter cake. Compared with the chamber filter press, the difference is that the diaphragm filter plates and the chamber filter plates with the same appearance are staggered to form filter chambers. When the material is filtered and pressed in the first stage, a fixed pressure is injected into the diaphragm filter plate cavity. The gas (or liquid) causes the diaphragm plate to bulge and squeeze the filter cake in reverse direction to reduce the moisture content of the filter cake. High-pressure air passes through the filter cake to squeeze out and separate the capillary water, structural water and other moisture in the filter cake.

If you choose water pressure for secondary pressing, the diaphragm filter press needs to be equipped with two pumps to work, one is a feed pump and the other is a press pump. The feed pump of the diaphragm filter press is normally equipped with a pump, and the secondary press pump can use a water pump ( Multi-stage centrifugal pump) for squeezing, the use of water pump requires a water tank at the same time. If you choose air pressure, the feed pump is normally equipped. An air compressor can be used instead of a water pump for secondary pressing. If air pressure is used, a water tank is not required.

3.Structural features of membrane filter press:

The diaphragm filter press is composed of a diaphragm plate and a chamber filter plate arranged to form a filter chamber. Under the pressure of the feeding pump, the slurry is input into the filter chamber, and the solids and liquids in the slurry are separated through the filter medium (filter cloth). After the solids in the slurry form a cake, air is introduced into the membrane to fully squeeze the solids in the filter chamber and reduce the moisture content. For users who filter viscous materials and have higher requirements for moisture content, this machine has its own unique characteristics.

The same as the conventional configuration, automatic turning plates, automatic water flushing, conveyors, mud storage hoppers and other devices can be added according to needs.

The filter plate of the membrane filter press is composed of a chamber filter plate and a membrane filter plate arranged at intervals. The diaphragm plate of the diaphragm filter press is equipped with an air pipe device for the secondary pressing function. welcome send your inquiry！