A kind of preparation method of high temperature resistant filter felt

Abstract

The invention relates to a preparation method of a high-temperature-resistant filter felt. The preparation method includes the specific steps: subjecting glass fiber to acid treatment and thermal sintering process to increase SiO2 content in glass and reduce shrinkage of the glass; by combing, laying and needling processes, preparing short glass fiber bundles into high-silica glass fiber needled felt, combining with base cloth, impregnating, and curing and setting to form the high-temperature-resistant filter felt. The preparation method has the advantages that after acid treatment and thermal sintering, SiO2 content of the glass fiber is increased and shrinkage of the glass fiber is decreased; the high-silica glass fiber can be used at 900 DEG C for a long time and can be used in the high-temperature insulating material field, the high-temperature smoke filtering field and other fields; the high-temperature-resistant filter felt composed of the high-silica glass fiber needled felt and the base cloth features high temperature resistance, flame retardancy, high filtering efficiency and the like, can effectively filter PM2.5 and has a promising application prospect in filtration of high-temperature flues and filtration of special gas heat media.

Description

technical field [0001] The invention relates to a method for preparing a filter felt, in particular to a method for preparing a high-temperature-resistant filter felt, which belongs to the field of filter materials. Background technique [0002] With the rapid development of science and technology, the continuous rise of industries such as electric power, steel, and construction has created a more affluent, convenient, and faster life for people, and at the same time, it has also posed a serious threat to the sustainable development of energy and the environment in our country. . Among the air pollutants emitted by these social industries, the main ones are corrosive chemicals such as high-temperature flue gas and dust emitted by industrial furnaces and garbage incineration. If they are directly discharged into the atmosphere without treatment, they will directly or indirectly affect people's health. Respiratory system, cardiovascular system, central nervous system, immune ...

AI Technical Summary

Problems solved by technology

However, its glass fiber has not been pre-treated, and SiO 2 The content is still relatively low, the high temperature resistance is poor, the strength is not enough, and the shrinkage rate is high