The filtering principle of Pall filter

The Pall filter is an important equipment in the S-zorb unit, responsible for significant gas-solid separation. The normal use of the Pall filter is a key point in this unit, and only the normal operation of the Pall filter can ensure that the catalyst is not severely lost.The main filter product names of China Strainer Network include:Flange-connection Y Fype Strainer,Hand-Operated Brush Type Strainer,Oxygen Strainer,P Type Automatic Sewage Disposal Strainer,SRB Series Basket Type Strainer,Stainless Steel Y Type Strainer

The filtering principle of the Pall filter in the S-zorb device is shown in the figure above. During the filtering process, the surface of the filter first forms a shape as shown in the left figure. When the design differential pressure is reached, reverse blowing begins, as shown in the right figure. The reverse blowing time is very short, and the result of reverse blowing is to blow large particles down from the surface of the filter, while fine particles can firmly adhere to the surface of the filter, forming a supplementary filtering layer and increasing the filtering effect. During the filtering process, smaller particles can be filtered out, and the filtering differential pressure of the filter itself changes to a constant value (which is greater than the differential pressure of the filter itself), achieving a supplementary balance. The relationship diagram between differential pressure and time during filter operation is as follows:

Note: △ P differential pressureInitial Differential Pressure of Initial △ P FilterPermanent cake △ P permanent filter layer differential pressure (the differential pressure when the filter is stable minus the initial differential pressure of the filter)Initiati.n. f bl. wback Start Backblowing Filter Differential Pressure

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