The difference between top-mounted wire mesh demister and bottom-mounted wire mesh demister

The difference between top-mounted wire mesh demister and bottom-mounted wire mesh demister

Top-mounted wire mesh demister is also called top-mounted wire mesh demister , S-type wire mesh demister , wire mesh mist arrester, wire mesh demister.

Wire mesh demister type: Wire mesh demister is divided into: (S top loading type), (X bottom loading type)

Selection of top-mounted wire mesh demister: When the inlet hole is opened on the top of the wire mesh demister, or there is no inlet hole but there is an equipment flange, a top-mounted wire mesh demister is selected.

Top mounted wire mesh demister specifications/materials:

Top mounted wire mesh demister diameter: DN300mm-35200mm,

Top mounted wire mesh demister thickness: 100mm. 150mm

The commonly used metal materials for top-loading wire mesh demisters are: (201、304、321、304A、316、304L、316L、2205 stainless steel wire) titanium wire, nickel wire, monel wire；

The plastic material of the top-mounted wire mesh demister is: (PTFE polytetrafluoroethylene wire) (PP polypropylene wire) mixed glass fiber and stainless steel wire, etc.

Top-mounted wire mesh demister purpose: Top-mounted wire mesh demister (demister) is used to separate the droplets entrained by the gas in the tower, so as to improve the mass transfer efficiency, reduce the loss of valuable materials and improve the operation of the compressor after the tower. Generally, top-mounted wire mesh demister is installed on the top of the tower. It can effectively remove the droplets of 3--5um. If a demister is installed between the tower plates, it can not only improve the mass transfer efficiency of the tower plates, but also reduce the distance between the plates. Therefore, top-mounted wire mesh demister is mainly used for gas-liquid separation. It can also be used as an air filter for gas separation. In addition, the wire mesh of the top-mounted wire mesh demister can also be used as a buffer for various instruments in the instrument industry to prevent electronic shielding from radio wave interference.

Bottom-mounted wire mesh demister is also called bottom-mounted wire mesh demister, bottom-mounted wire mesh demister , X-type wire mesh demister

Bottom-mounted wire mesh demister materials : PTFE polytetrafluoroethylene wire, PP polypropylene wire, 304/321/201/304A/316/316L stainless steel wire, Q235 wire, titanium wire, nickel wire, monel alloy wire and other common materials.

Selection of bottom-mounted wire mesh demister: When the inlet hole is located below the wire mesh demister, use a bottom-mounted wire mesh demister.

Specifications/types of bottom-mounted wire mesh demister:

(X) Diameter range of bottom-mounted wire mesh demister: DN400-34600mm Thickness: 100-150mm

Working principle of bottom-mounted wire mesh demister: The diameter of dispersed droplets in the gas encountered in normal chemical operations is about 0.1 to 5000μm. Generally, the separation problem of particles with a particle size of more than 100μm is easy to solve due to the fast sedimentation rate. Usually, droplets with a diameter greater than 50μm can be separated by gravity sedimentation; droplets with a diameter greater than 5μm can be separated by inertial collision and centrifugal separation; for smaller fine mist, it is necessary to try to aggregate them to form larger particles, or use fiber filters and electrostatic demisters. The bottom-mounted wire mesh demister is mainly used to separate droplets with a diameter greater than 3μm to 5μm. When the gas with mist rises at a certain speed and passes through the metal wire mesh mounted on the grid, due to the inertial effect of the rising mist, the mist collides with the filaments and adheres to the surface of the filaments. The mist on the surface of the filaments further diffuses and the gravity sedimentation of the mist itself causes the mist to form larger droplets that flow along the filaments to its interweaving. Due to the wettability of the filaments, the surface tension of the liquid and the capillary action of the filaments, the droplets grow larger and larger until their own gravity exceeds the combined force of the rising buoyancy of the gas and the surface tension of the liquid, and then they are separated and fall down, flowing to the downstream equipment of the container. As long as the operating conditions such as the gas velocity are properly selected, the defoaming efficiency of the gas after passing through the bottom-mounted wire mesh demister can reach more than 97%, which can achieve the purpose of completely removing the mist.