Dust removal method

Abstract

The invention discloses a dust removal method which is characterized in that a dust removal device is adopted, the dust removal device comprises a filter structure, the filter structure comprises a filter element, the filter element comprises filter tubes, and tube bodies of the filter tubes are formed by shaping metal or a sheet-shaped material taking metal as a matrix in a rolled manner and sealing and processing joints; the outer diameter of the tube bodies is only 20-200 mm, and the distance between every two adjacent filter tubes is 5-100 mm; the filtering wind speed is 0.8-2 m / min, and the temperature of gas to be filtered is less than or equal to 800 DEG C. Due to the adoption of a filtering structure with a larger filtering area, the filtering resistance is smaller, and the filtering wind speed is lower; the tube bodies made of the metal or the sheet-shaped material taking the metal as the matrix is adopted, so the filter element has the filtering resistance obviously smaller than that of a ceramic filter element, and can bear the filtering temperature far higher than that of a non-metal cloth bag. Therefore, compared with the prior art, the dust removal method solves the problems that a non-metal cloth bag is not resistant to high temperature and not high in precision, and the technical problem that the filtering resistance is large due to small filtering area is solved.

Description

[0001] This application claims the priority of the first application in China with the application number 2020102681879, the application date is April 8, 2020, and the title is "filter tube, cluster filter element and its application". technical field [0002] The invention relates to the technical field of flake materials and filtration, in particular, to a dust removal method. Background technique [0003] Sheet-shaped materials have significantly better high-temperature resistance than non-metallic cloth bags and lower filtration resistance than ceramic filter elements, so tubular filter elements rolled from sheet-shaped materials are widely used. [0004] The patent publication numbers that the applicant of the present application has submitted are CN104759630A, CN104759629A, CN104874798A, CN104959611A, CN104959612A and CN104874801A and other Chinese invention patent applications disclose unsupported or supported (referring to raw material powder is attached on the suppor...

AI Technical Summary

Problems solved by technology

[0005] (1) The inside or outside of the filter element is provided with a support body, which significantly increases the weight and cost;

[0006] (2) Due to the large diameter of the filter element, the sealing of both ends of the filter element is particularly complicated (such as the inner filter filter device published by the Chinese invention patent with the application number of 2018103243431), and once the filter element is damaged, it is usually replaced directly due to the difficulty of repair. very high cost;

[0007] (3) The diameter of the filter element is large, and the filter device requires a large footprint;

[0008] (4) If you want to reduce the seams to improve the strength of the filter element, you need to make the porous film before rolling have a very large area, which not only significantly increases the production cost, but also causes waste of small-area porous film after cutting;

[0009] (5) Since the filter element is very long, and the added support body significantly increases in weight, the handling and installation of the filter element requires the cooperation of multiple staff, which is time-consuming and laborious;

[0010] (6) When the filter element is very long, the uniformity of the blowback effect along the axial distribution of the filter element becomes worse;

[0011] (7) Due to limiting factors such as the site, the filter area of ​​the filter element is limited.

[0012] However, there is no effective and low-cost means to increase the filtration area and strength of the filter element rolled from sheet-like materials, except for increasing the diameter and length and setting the support body.

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