What is the process of fluid filtration by sintered felt?
The sintered felt is made of micron diameter metal fibers laid, stacked and sintered at high temperature. The multi-layer metal fiber felt has pore gradient formed by layers with different pore sizes, which can be controlled to achieve higher filtration accuracy and greater dirt retention capacity than single-layer felt. The wave can be folded to increase the filtering area and can be welded; it can continuously maintain the filtering effect of the filter cloth, and has the characteristics of three-dimensional network, porous structure, high porosity, large surface area, pore size and uniform distribution. So, what are the filtration processes of sintered felt?
The first stage (i.e. stable stage): the filter material of metal fiber sintered felt filter is original clean, and its material structure shape is fixed. In the initial stage of filtration, when the dust containing fluid passes through the pore channel of the filter material, under the joint action of various filtering mechanisms, the fluid mixed with pollution particles will quickly increase, fill each channel of the filter material and accumulate in it On the surface of the inner hole or the surface of the filter material, with the continuous seepage, the liquid flow mainly moves along the normal channel. At this time, the resistance of the filter material is relatively stable. This stage is actually short-lived and will soon end.
The second stage (i.e. unstable stage): as the pores of the filter material become more and more narrow or even gradually blocked, the pollution particles accumulate continuously on the surface of the filter material to form a filter cake and form a new filter layer. This process is the main working condition of the filter material. In this state, the system pollution particles are subject to the dual filtration of filter cake and filter material at the same time, At this time, the resistance of the filter material is rising, and the filtration effect is in an unstable state, and its filtration efficiency is much higher than that of the filter cake on the surface of the filter material.
So, Sintered felt It overcomes the shortcomings of metal mesh, which is easy to block and damage. It makes up for the vulnerability and low flow rate of powder filtration products, and solves the characteristics of high temperature and pressure resistance of filter paper and cloth. Therefore, stainless steel sintered felt has excellent filtration performance and is an ideal choice for high temperature resistance, corrosion resistance and high temperature resistance. High precision filter materials can be folded to increase the filtering area, and can be welded; large dust capacity, high filtering accuracy, slow pressure rise, long replacement cycle; high porosity, good permeability, small pressure loss and large flow rate.