Pressure drainage type radioactive sewage filter

Abstract

The invention provides a pressure drainage type radioactive sewage filter, and belongs to the technical field of radioactive decontamination of nuclear power plants. The filter comprises a shielding shell, an inner cylinder and a positioning sealing disc, an outer ring and an inner ring on the lower surface of the positioning sealing disc are respectively aligned and hermetically welded to upper ports of the shielding shell and the inner cylinder, and an interlayer space formed by welding the inner cylinder, the shielding shell and the positioning sealing disc is filled with a shielding lead plate, a recess for embedding a filter element adapter disc is formed in the middle of the upper surface of the positioning sealing disc, a shielding ring is fixed around the recess, the middle part ofthe filter element adapter disc is a filter element area, vertical drainage holes are distributed in the periphery of the filter element adapter disc at intervals, a shielding cover is arranged on the upper surface of the filter element adapter disc, an isolating ring for separating the filter element area from the vertical drainage holes is arranged on the lower surface of the shielding cover, and a medium inlet hole and a medium outlet hole are formed in the shielding cover. By the pressure drainage type radioactive sewage filter, the filtering effect can be guaranteed, the ideal anti-radiation performance is achieved, and maintenance and replacement are convenient.

Description

technical field [0001] The invention relates to a decontamination device for filtering a liquid medium containing radioactive suspended particles, in particular to a pressure discharge type radioactive sewage filter, which belongs to the technical field of radioactive decontamination of nuclear power plants. Background technique [0002] After chemical cleaning and radioactive decontamination of the inner surfaces of various equipment in nuclear power plants, a large amount of liquid media containing radioactive suspended particles will be produced. The direct discharge of these media will cause environmental pollution and radiation diffusion, and also cause a lot of waste, so it is necessary to filter and recycle the media. [0003] The typical structure of the filter device in the prior art is disclosed in the Chinese patent document with application number 201410324664.3. The filter device includes a hollow cylinder, an upper head and a lower head; a filter element is arr...

AI Technical Summary

Problems solved by technology

This type of prior art cannot be directly applied to the treatment of radioactive substances because it does not have a radiation protection function; and if a shielding device with a radiation protection function is added on its basis, not only the process is complicated, but also the assembly and replacement of filter elements will be very troublesome

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