Ventilation and dust removal device and dust removal method and purification and dehumidification method thereof

Abstract

The invention belongs to the technical field of nuclear facility ventilation, and particularly relates to a ventilation and dust removal device, a dust removal method of the ventilation and dust removal device and a purification and dehumidification method of the ventilation and dust removal device. The ventilation and dust removal device is arranged on an air outlet of a mixer of a cement solidification line of a nuclear power station. The ventilation and dust removal device comprises a wet dust removal filter (3), the air inlet end of the wet dust removal filter (3) communicates with a dust collection hose (1), the air outlet end of the wet dust removal filter (3) communicates with a condensation dehumidification device (5). The ventilation and dust removal device further comprises a first water tank (4) connected with the wet dust removal filter (3). The air inlet end of the dust collection hose (1) is connected with an air outlet of the mixer. Dust-containing air discharged from the mixer enters the wet dust removal filter (3) through the dust collection hose (1) for dust removal, then enters the condensation dehumidification device (5) for dehumidification treatment to form clean air to be discharged; and the dust removal is realized by circulating water in the first water tank (4). On the premise of meeting the air exhaust quality requirement, a large amount of dry cement materials are prevented from being lost due to ventilation, meanwhile, the water consumption is reduced, and the output of secondary waste is reduced.

Description

technical field [0001] The invention belongs to the technical field of nuclear facility ventilation, and in particular relates to a ventilation and dust removal device, a dust removal method, and a purification and dehumidification method. Background technique [0002] The cement solidification line belongs to the solid waste treatment system of the nuclear power plant. Its function is to mix radioactive waste with cement dry material, put them into standard steel drums and seal them to form a hard solidified body for storage. In the mixer of cement dry material and radioactive waste, due to the input of cement dry material, a large amount of cement dust will fly; and the conveying pipeline of cement dry material needs to be continuously fed with dry hot air to avoid cement hardening and blockage caused by moisture in the mixer , further exacerbated the floating of cement dust. Therefore, the mixer needs to be equipped with an efficient ventilation and dust removal system, ...

AI Technical Summary

Problems solved by technology

[0004] The air quality after filtering by the filter element dust filter is good, but due to the high humidity in the mixer, there are problems of hardening and blockage of the filter element after the combination of dust and water vapor, resulting in frequent replacement problems; the dust removal efficiency of wet dust removal filters is generally greater than 90% , up to 99.5%, but it has problems such as large energy consumption, a lot of secondary waste such as waste liquid and mud, and high air humidity after filtration.

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