A double-layer filter tube

Abstract

Novel double-layer filter pipe The invention belongs to the technical field of nuclear fuel element production, and particularly relates to a novel double-layer filter pipe; the technical problem solved by the invention is to provide a novel bidirectional filter tank which has high filtering stability and meets national discharge standards in production; the technical scheme adopted by the utility model is that the filter pipe comprises a mounting flange (1), an outer layer pipe (2), an inner layer pipe (3) and an annular plate (4), wherein the mounting flange (1) has a bicylindrical boss structure; the inner layer pipe (3) sleeves an inner boss and is welded with the inner boss; the outer layer pipe (2) sleeves an outer boss and is welded with the outer boss; the annular plate (4) has a single annular boss structure; the inner layer pipe (3) is welded on the inner circle of the boss, and the outer layer pipe (2) is welded on the outer circle of the boss. The beneficial effects of the invention are that the filtering stability is high; national discharge standards for uranium-containing by-products (HF) are met during production; the filtering area for a single filter tank is increased; the filtering precision is improved significantly; and the service life is increased greatly.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel element production, and in particular relates to a double-layer filter tube. Background technique [0002] At present, the filter tubes used in domestic fuel chemical industry lines are important components in the filtration of uranium-containing dust exhaust gas. Previously, the filter tube technology has been relying on South African star tubes. The filter tubes independently developed in my country are circular single-layer tubes. : φ110×4×1000; filter area about: 0.34m 2 / Zhiru figure 1 shown. Compared with the original star-shaped tube in South Africa, the pressure drop of the domestic self-developed filter tube is much larger, and it quickly reaches a high level above 10KPa when it starts to operate. From the pressure drop formula, the main reason is that the filter area is reduced (the total filter area of ​​4 pipes is reduced from 2.5m 2 Reduced to 1.2m 2 ); caused by poor air pe...

AI Technical Summary

Problems solved by technology

Excessive pressure drop will cause excessive burden on the exhaust system, which is not conducive to the stable operation of production. Therefore, under the premise of not affecting other effects, the filter pressure drop should be reduced as much as possible

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