Method for cleaning blocked tower top filter of ion exchange tower

Abstract

The invention discloses a method for cleaning a blocked tower top filter of an ion exchange tower, which can realize the cleaning of the tower top filter under the condition of no disassembly, reduce the disassembly frequency of the tower top filter, reduce the labor intensity of personnel and guarantee the continuous operation of an ion exchange process. The method disclosed by the invention has the beneficial effects that the blocked tower top filter is cleaned by adopting an adsorption tail liquid combined compressed air flushing process and an in-tower solution self-circulation and compressed air combined flushing process respectively, and the back flushing flow after cleaning can be recovered to 90% or above of the initial flow, so that the normal operation of an ion exchange process is effectively ensured.

Description

A kind of cleaning method of ion exchange tower top filter after clogging technical field The invention belongs to in-situ leaching and mining uranium technical field, be specifically related to a kind of cleaning of ion exchange tower tower top filter after blocking The washing method is to use the combination of high-pressure water and high-pressure gas to clean the blocked fixed-bed ion exchange tower top filter. wash. Background technique Existing large amount of uranium deposits use CO 2 +O 2 In-situ leaching uranium mining process, uranium hydrometallurgy ion exchange process includes absorbing Attachment, rinsing and backflushing process. The adsorption process adopts fixed-bed two-column adsorption in series, and the adsorption material adopts 201×7 type resin, and a single column is used for adsorption. The average loading amount of resin is about 6t, and the resin particle size is concentrated in 315-1250μm, accounting for more than 95%; The main...

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Problems solved by technology

[0004] Under the large recoil flow rate, the resin and sediment in the tower are in a suspended state. In order to realize the separation of the resin and the sediment, a whole-plate laser-slit type and a winding rod-wound bracket welding type tower top filter are installed on the top of the tower. However, after 1-2 adsorption-recoil cycles, the device is easily blocked by sediment and resin in the tower, and the blocked tower top filter needs to be manually disassembled and cleaned, which takes a long time and is difficult to disassemble and clean. 3~4h), which seriously affects the operation of the ion exchange process

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