Wedge Wire Screen VS Woven Mesh

In petrochemical filtration systems, filters are commonly used.  In recent years, wedge wire screens have increasingly replaced traditional woven mesh and perforated plates.

This is mainly determined by the unique structure and many advantages of the wedge wire screens.  

Within a certain range of pores, the fluid resistance drop of the wedge wire screen is significantly smaller than that of woven mesh and orifice plate structures. When designing and selecting filter materials, the calculation and comparison of resistance drop are carried out first, which has important guiding significance for the selection of filters.

The chemical pipeline filter element, the reactor support grid, and the dryer grille all need to use screens. 

When the fluid passes through the screen, there is a drop in resistance. The magnitude of the resistance drop not only involves energy consumption and production costs but also directly affects the condition of the processing system, thereby affecting production efficiency and product quality.

Therefore, without affecting the structure of the equipment, reducing the resistance of the filter screen can not only reduce energy consumption and reduce production costs but also has important significance for improving production efficiency and product quality.  

The Characteristics Of Woven Mesh

The most industrial application is the composite structure of the filter screen woven by metal wire and the perforated plate.

Due to the large contact area between solid particles (catalysts, molecular sieves, or various filter materials) and the wire mesh, the particles are easy to block or get stuck in the pores of the metal wire mesh or perforated plate, causing the pressure drop to increase.

After bending and deforming, it causes expensive media loss and even makes the device inoperable and difficult to repair.

Features of Wedge Wire Screen

The wedge wire screen is a V-shaped metal profile wire which is welded on the vertically arranged support rods by resistance welding.

A continuous and uniform gap is formed, and the filter is in contact with the surface of the filter at only two points.

The unique structural form of wedge wire screen determines that it has the characteristics that woven mesh have never had:

  1. Each intersection of the profile wire and the support rod is welded, with high accuracy and accurate gap.
  2. High strength and durability. 
  3. The opening range increases, the opening rate increases, and the effective circulation area increases. 
  4. The gap is continuous and the surface of the mesh is smooth, so that the catalyst flows smoothly, with less abrasion, and the particles are not easy to crush. 
  5. Anti-blocking. 
  6. Wear resistant. 

Comparison of Wedge Wire Screen and Woven Mesh

The anti-clogging performance of the two filter screens is significantly different. In addition, the strength of the woven mesh is relatively low, and it is generally required to be used in combination with a perforated plate during use.

Therefore, the open porosity of this composite structure is the product of the open porosity of the woven mesh and the porous plate, and the open porosity is greatly reduced.

Due to the different structures of the two filter screens, even without considering factors such as clogging, within a certain pore range, the resistance drop generated by the fluid passing through the two filter screens is quite different.

The resistance drop of the wedge wire screen is obviously smaller than that of the woven mesh. Therefore, without affecting the equipment structure, the use of wedge wire screen reduces energy consumption and production costs, and has obvious advantages over woven mesh in terms of improving production efficiency and product quality.