Smoke filter pipe and method for coating same

Abstract

The invention relates to a method for coating a smoke filter pipe, wherein the smoke filter pipe is in a hollow cylindrical structure, the support surface of the filter pipe is coated with a fibrous membrane, a mullite film is also coated on the fibrous membrane, and the aperture of the mullite film is smaller than the aperture of the fibrous membrane. A coating technology is adopted to manufacture, the method avoids the defects of not high filter precision and easy blocking in the prior art through adopting a structure of a mullite support body, an aluminum silicate fibrous membrane and the mullite film, because a multilayer structure is adopted and layers with different apertures form aperture gradients, higher filter precision can be controlled and obtained, ash is easily backflushed and removed during the filter process, and as a result, the service life of the filter pipe is prolonged. During the coating process, paints are adopted to coat, so the defects of uneven coating and low efficiency of manual coating in the prior are avoided, the production efficiency is improved, the surface of the filter pipe is uniformly coated, and accordingly, the smoke filter pipe with higher filter precision is realized.

Description

technical field [0001] The invention relates to flue gas purification equipment, in particular to a flue gas filter pipe and a coating method thereof. Background technique [0002] At present, high-temperature and low-pressure flue gas filter tubes are mainly used in chemical industry, petroleum, metallurgy, electric power and other industries. The principle is to use the porosity of the filter tube to filter a large amount of flue gas, so as to meet the requirements of clean energy. The structure of the flue gas filter pipe in the prior art is a support, and the surface of the support body is coated with a fiber membrane, which has a simple structure and is convenient to manufacture. structure, its filtration accuracy is not enough, long-term use is easy to block the filter tube, the product needs to be cleaned and replaced frequently, the service life of the product is low, and the use cost of the filter tube is increased. [0003] In addition, in the manufacturing proces...

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Problems solved by technology

[0004] Aiming at the disadvantages of low filtration precision and easy clogging of the flue gas filter tube in the above-mentioned prior art, the applicant provides a flue gas filter tube with reasonable structure and convenient manufacture and its coating method. Through the multi-layer film structure, different The pore size layer forms a pore gradient, which improves the filtration accuracy, facilitates cleaning and prolongs the service life

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