1. Introduction to stainless steel wire mesh filter

(1) Concept: The machine for installing the filter is called a filter. It is a new type of porous functional material with ideal uniform pore size distribution and excellent fluid permeability. It has high strength and can withstand heat well. Stress and impact, can be machined, welded, cleaned and regenerated, especially for high-purity, high-safety purification systems.

(2) Uses: Filters are mainly used for the filtration of water and food, while others are mainly used for the filtration of paint and coating impurities.

    

2. Analysis of performance influencing factors and significance of research

 

At present, the development and application of purification and separation technology and equipment based on rigid sintered stainless steel wire mesh materials. Analysis and research on the influencing factors of the performance of stainless steel wire mesh filter have important guiding significance for reducing the filtration cost, optimizing the design of the filter and prolonging the service life of the filter.

 

A comprehensive analysis of the factors affecting the performance of the stainless steel wire mesh filter provides advice on the good operation of the filter. Based on the mechanism of separation and filtration, the factors affecting the performance of the filter, including the wire mesh structure, the number of cycles, the filtration rate, the fluid concentration and temperature, and the granular particles, were analyzed from three aspects: filtration efficiency, pressure drop and residual pressure drop. The diameter, compressibility of the filter cake, maximum allowable pressure drop, backflush pressure, etc. The results show that the factors affect each other, and the actual filtration process must be considered comprehensively to achieve the expected performance of the filter.

 

 3. Filtration mechanism of stainless steel wire mesh

 

 The stainless steel wire mesh filtration process mainly includes the following four stages:

 

(1) The initial stage of filtration: the impurity particles are deposited on the surface of the clean mesh as the fluid passes through the screen medium. At this time, no continuous particle layer is formed, and the pressure drop loss is small, mainly relying on the interception and diffusion mechanism.

 

 (2) Intermediate stage of filtration: a continuous filtration layer, that is, a filter cake, is gradually formed. At this time, the filtration pore size is reduced, the interception and deposition of dust is greatly improved, the filtration efficiency is sharply increased, and the pressure difference is rapidly increased.

(3) Filtration stabilization stage: This stage mainly relies on the filtration and screening action of the filter cake, and the screen acts to form a filter cake and support reinforcement. At this time, the filtration mechanism is mainly screening. At this time, the pressure difference changes slowly, and the relative intermediate phase is approximately unchanged.

 

 (4) Filtration backflushing stage: As the filter cake is continuously thickened, it is necessary to perform on-line cleaning to achieve recycling of the filter. At this point, the dust removal efficiency is slightly reduced, and a filtration cycle is completed.