Principle and application field of the precision filter in the petrochemical industry

Wedge wire precision filter, also known as filter element type filter and security filter, is composed of two parts: filter and wedge net filter element, which can be single-core or multi-core. The specific filter element material and specification are selected according to the actual situation of customers; the production process can be mirror polishing or surface sandblasting.
The filter with different materials and different precision can effectively remove all kinds of small impurities based on the diameter of the filter.

Principle and structure of precision filter in the petrochemical industry

The filtering principle of the precision filter is that the liquid to be filtered is pressed in from the inlet of the filter, filtered into a clear liquid through the filter layer from the outside to the inside through the wedge wire filter element, and then discharged through the outlet.

The security filter adopts the shaped filter material. Under the action of pressure, the original liquid passes through the filter material, the filter residue remains on the pipe wall, and the filtrate flows out through the filter material, so as to achieve the purpose of filtration.

Structure: filter cloth, filter screen, filter piece, sintered filter tube, wedge wire filter element, melt blown filter element, etc. Due to different filter materials, the filtration pore size is also different.

Wedge wire filter precision filtration is a kind of filtration between sand filtration (coarse filtration) and ultrafiltration. The filtration aperture is generally in the range of 15-120 μM.

Components of the precision filter in the petrochemical industry

The filter is mainly composed of a filter shell and wedge wire filter elements. The filter shell is mostly made of 304 stainless steel. If it is used on special occasions such as acid and alkali resistance, r316 stainless steel can be used as the shell. It can be divided into flange type and clamp type, and flange type shell is mainly used on the occasion of large filtration flow.

Technical parameters of the precision filter in the petrochemical industry

Name of filter: precision filter

Number of filter elements (cores): 1, 3, 5, 7, 9, 11, 13, 15

Size of filter element (m): 5, 10, 20, 30

The precision of filter element (μ m): 15, 20, 25, 30, 50, 100, 150.

Category of filter element: folding type (222 inserts, 226 inserts), titanium rod, ceramic

Filter material: SUS304 / SUS316 / SUS316L

Operating pressure of filter (map): 0.1-0.6-1

Material: stainless steel (SUS) 304, SUS316, SUS316L

Filter element form: clip in 226, plug-in 222 filter element

Filter size: 10 inch, 20 inch, 30 inch, 40 inch

Surface treatment: cylinder mirror polishing, surface mechanical or electrolytic polishing, matte sandblasting

Note: the size, structure, and size of the filter element depend on the design

Table of the precision filter in the petrochemical industry

Precision filter model flow (T) caliber

Clamp type 5-core 10 inch ф 195 × 250 2.0-3.01 inch

Clamp type 5-core 10 inch ф 195 × 250 2.0-3.01 inch

Clamp type 5-core 20 inch ф 195 × 500 4.0-6.01 inch

Clamp type 5-core 30 inch ф 195 × 750 7.0-8.0 1.5 inch

Clamp type 5-core 40 inch ф 195 × 1000 9.0-11.0 1.5 inch

Clamp type 7-core 10 inch ф 230 × 250 3.0-4.0 1.2 inch

Clamp type 7-core 20 inch ф 230 × 500 6.0-8.0 1.5 inch

Clamp type 7-core 30 inch ф 230 × 750 10.0-11.0 2 inch

Clamp type 7-core 40 inch ф 230 × 1000 13.0-15.0 2 inch

Flange type 10 core 20 inch ф 273 × 500 7.0-9.02 inch

Flange type 10 core 30 inch ф 273 × 750 10.5-13.5 2 inch

Flange type 10 core 40 inch ф 273 × 1000 14.0-18.0 2 inch

Flange type 12 core 20 inch ф 300 × 500 9.0-10.0 2 inch

Flange type 12 core 30 inch ф 300 × 750 14.0-15.0 2 inch

Flange type 12 core 40 inch ф 300 × 1000 18.0-20.0 2 inch

Flange type 12-15 core 20 inch ф 325 × 500 12.0-15.0 2 inch

Flange type 12-15 core 30 inch ф 325 × 750 18.0-22.0 2 inch

Flange type 12-15 core 40 inch ф 325 × 1000 24.0-30.0 2 inch

Flange type 19-20 core 30 inch ф 400 × 750 27.5-30.0 2.5 inch

Flange type 19-20 core 40 inch ф 400 × 1000 38.0-40.0 2.5 inch

Flange type 22-25 core 40 inch ф 450 × 1000 44-50 2.5 inch

Flange type 30-35 core 30 inch ф 500 × 750 45.0-52.5 DN65

Flange type 30-35 core 40 inch ф 500 × 1000 60.0-70.0 DN80

Flange type 36-40 core 30 inch ф 600 × 750 54.0-60.0 DN80

Flange type 36-40 core 40 inch ф 600 × 1000 72.0-80.0 DN80

Flange type 41-50 core 40 inch ф 700 × 1000 82.0-100.0 DN80

Flange 41-50 core 40 inch ф 700 × 750 82.5-99.0 DN 100

Flange 51-66 core 40 inch ф 800 × 1000 110.0-132.0 DN 100

Application fields of precision filters in the petrochemical industry:

Precision filters in the petrochemical and chemical industry are applied to: purification of various fluids in the manufacturing process of hydrogen peroxide, resin, lubricating oil, polymer, viscose, aviation kerosene and various oil products, catalyst and chemical fiber, separation, and recovery of chemical intermediate products and chemical products, particle removal and filtration of lubricating oil, chemical drugs, oil, hot solvent, phosphate coating, etc.