Method for producing compound filter of multi-layer metal meshes and metal powder

Abstract

The invention relates to a method for producing compound filter of multi-layer metal meshes and metal powder, which comprises the steps of weaving metal wires to obtain metal meshes with different mesh numbers; laminating the metal meshes with different mesh numbers to obtain a laminated layer structure, wherein the mesh numbers of the laminated layers from one side to the other side increase continuously and the number of laminated layers is 2-6; then placing the laminated layer structure in a vacuum furnace and sintering at 1000-1600 DEG C to obtain a multiple support layers; then cooling and taking out of the support layers, manufacturing a metal compound layer of 100-600 meshes on one side of the support layer of high mesh by means of electrostatic spraying and curtain coating, controlling the thickness of the compound layer with 0.1-0.5mm and then sintering at 1000-1600 DEG C, cooling and taking out of the compound layer to obtain the compound filter of multi-layer metal meshes and metal powder. The compound filter has the advantages of low filtering resistance, large filter flux and strong bearing capacity and can be widely applied to industrial fields of chemical engineering, medicine, power generation,metallurgy, food and the like.

Description

technical field [0001] The invention belongs to the technical field of filter equipment production, and relates to a production method of a multilayer metal mesh and metal powder composite filter widely used in chemical industry, medicine, power generation, metallurgy, food and other industrial fields. The multilayer metal mesh and metal powder Composite filters are especially suitable for filtering high-temperature gases in petrochemical industry, purifying high-temperature flue gas in metallurgical industry, filtering and recycling catalysts in petrochemical industry, and purifying dust and exhaust gas in thermal power generation and nuclear power generation industries. Background technique [0002] The requirements for the filter material are to have as large a filtration flow as possible, and at the same time, the filter itself should have a small filtration resistance, so as to reduce energy consumption. However, in practice, for ordinary filters, such as various paper ...

AI Technical Summary

Problems solved by technology

However, in practice, for ordinary filters, such as various paper filters and metal mesh filters, there are often such contradictions: under the condition of large filtration flux, the filtration accuracy is often not high, when high-precision filtration is required , this kind of filter obviously cannot meet the practical requirements in terms of filtering accuracy

[0003] In order to achieve the purpose of high-precision filtration, metal powder tube filters and ceramic tube filters have been developed abroad. The filtration accuracy of these filters has been significantly improved. However, due to their brittleness and heat resistance Low shock capacity, so it can only be used in low temperature conditions, and it is easy to damage itself, and the production is difficult and the price is high

Although the metal powder tube filter has a greatly increased operating temperature, and some filters even exceed 1000 ° C, it also has the disadvantage of low pressure

In petrochemical and steel industry applications, since filters work in high-pressure and high-temperature environments, some filters often break, which leads to the failure of the entire filter system, which brings huge losses to production.