Filter tubes and preparation method thereof

Abstract

The invention discloses filter tubes and a preparation method thereof. When in use, the filter tubes are densely distributed in a filter in an array manner and are used for carrying out gas-solid separation filtration and / or liquid-solid separation filtration on a to-be-filtered object, and tube bodies of the filter tubes are formed by shaping metal or a sheet-shaped material taking metal as a matrix in a rolling manner and carrying out sealing processing on joints; and the outer diameter of the tube bodies formed by rolling is only 20 to 200 mm, preferably 20 to 90 mm, further preferably 20 to 60 mm, and further preferably 25 to 50 mm. The preparation method of the filter tubes comprises the steps: rolling the sheet-shaped material with the thickness of 0.2-2.5 mm into the tube bodies with the outer diameter of 20-200 mm; and when the diameter of the filter tubes is reduced to be 200 mm or less, the strength of the filter tubes can be maintained in a tube shape even if a support bodyis not arranged any more, and self-support can be realized, so that the weight and the cost can be remarkably reduced; therefore, the technical problems of high cost and low strength of a filter element in the prior art are effectively 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 filter tube and a method for preparing the filter tube. 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 materi...

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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