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Introduction to Metal filter
2021-08-24
Metal filter is the general name of precision filter, and the filtering effect is general, high efficiency, and precision. The main materials are stainless steel mesh, sintered mesh, sintered felt, honeycomb core and other high-efficiency filter materials. It has a wide range of uses, and the filter medium can be as large as small and even accurate to micrometers. It is widely used in various industries such as pharmacy, machinery, electric power, chemical industry, food processing, oil refining, steel plant, sewage treatment, precision filtration, scientific experiment and so on.
Among all the filter materials, the metal filter has the advantages of high strength, pressure resistance, uniform force, good high temperature resistance, and high content of connected pores.
The metal filter is mainly made of metal powder and its alloy powder as raw materials. It is made into parts of various shapes and specifications by pressing or loose sintering. It is suitable for normal temperature and temperatures below 1000 ℃, and separates the filtrate from the filtrate. .
The metal filter can filter out dust particles (about 0.2μm) to coarse particles in the air, and the filtration particle size starts from 0.2μm to several hundred microns. Due to the high strength of dry metal, pressure filtration can increase the separation speed of the filtrate and the filtrate, so the filtration efficiency is increased. The filter permeability coefficient can be quoted by Darcy's formula to illustrate the gas permeability. Under laminar flow conditions, the volumetric flow rate per unit area is proportional to its pressure gradient and inversely proportional to the viscosity coefficient of the medium. The proportional constant is called The air permeability of the material.
Among all the filter materials, the metal filter has the advantages of high strength, pressure resistance, uniform force, good high temperature resistance, and high content of connected pores.
The metal filter is mainly made of metal powder and its alloy powder as raw materials. It is made into parts of various shapes and specifications by pressing or loose sintering. It is suitable for normal temperature and temperatures below 1000 ℃, and separates the filtrate from the filtrate. .
The metal filter can filter out dust particles (about 0.2μm) to coarse particles in the air, and the filtration particle size starts from 0.2μm to several hundred microns. Due to the high strength of dry metal, pressure filtration can increase the separation speed of the filtrate and the filtrate, so the filtration efficiency is increased. The filter permeability coefficient can be quoted by Darcy's formula to illustrate the gas permeability. Under laminar flow conditions, the volumetric flow rate per unit area is proportional to its pressure gradient and inversely proportional to the viscosity coefficient of the medium. The proportional constant is called The air permeability of the material.
In the liquid, the weight of the liquid needs to be considered, which is called the permeability coefficient after correction. When the pore size is 2~3μm, the difference between the permeability coefficient of liquid and gas can be up to 20 times, but when the pore size is 500um, it is the same. According to the requirements, the metal filter is made of tin bronze, nickel, Monel, stainless steel, titanium, titanium aluminum 30. Sintered low-carbon steel and other powders. Used in the purification of blast furnace gas, argon and nitrogen for semiconductors, air, etc.; dust removal and particle recovery; bacteria filtering and pharmaceutical and liquefied gas purification.
