Continuous deslagging method and system

Abstract

The invention discloses a continuous deslagging method which comprises the following steps: S1, intermittently introducing first compressed gas into a purging device placed in feed liquid of a feed liquid storage tank so as to enable the feed liquid entering the purging device to be sprayed out to form feed liquid jet flow, and purging residues dispersed in the feed liquid storage tank to a risersuction inlet of the lifting device through the feed liquid jet flow; and S2, continuously introducing second compressed gas into the lifting device so as to suck residues in the feed liquid storage tank through a lifting pipe suction inlet of the lifting device, and discharging the residues after lifting. The invention further discloses a continuous deslagging system for the method. According tothe invention, stable and continuous deslagging can be realized, and the problems of violent vibration and the like are avoided.

Description

technical field [0001] The invention belongs to the field of nuclear technology, and in particular relates to a continuous slag discharge method and system for residues produced in the process of dissolving spent fuel reprocessing. Background technique [0002] During the continuous dissolution process of spent fuel reprocessing, the short pieces of sheared spent fuel are continuously added to the dissolver, and react with the nitric acid in the dissolver, and the dissolution reaction will continuously produce insoluble residues, which cannot be tolerated. The accumulation at the bottom of the flat tank of the dissolver may cause problems such as local heating and hardening of the bottom of the flat tank, so it needs to be discharged in time. [0003] At present, the deposited residue is mainly taken out through the cooperative operation of the purging device and the lifting device. However, the traditional purging device blows the residue to the residue inlet of the liftin...

AI Technical Summary

Problems solved by technology

However, the traditional purging device blows the residue to the residue inlet of the lifting device through the blown compressed air flow. This way of blowing the residue by the air flow formed by the compressed air will make the material in the dissolver The liquid, residue and the purging device itself produce severe vibrations, which is not conducive to lifting and removing the residue

In addition, the lifting air intake pipe of the existing lifting device is directly connected to the lifting pipe. When the air intake flow rate is large, it is easy to form an airflow blowing to the lower part of the rising pipe, causing back blowing, and instead blows the residue from the residue inlet of the lifting device. from, reducing the effect of slag discharge

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