Method and device for cyclone separation and purification of radioactive waste liquid in waste liquid treatment system

Abstract

The invention relates to a waste liquid processing system radiating waste liquid whirl separating purifying method and device and provides the waste liquid processing system radiating waste liquid whirl separating purifying method. The method comprises the following steps that (i) a micro whirl separating sleeve device is provided, wherein the micro whirl separating sleeve device comprises a shell body (1) including an upper cavity body, a middle cavity body (6) and a lower cavity body, a micro whirl separator (3) arranged inside the middle cavity body (6) and an ash bucket (9) arranged inside the upper cavity body, (ii) radiating waste liquid with particle impurities are sent to the middle cavity body of the micro whirl separating sleeve device, the micro whirl separator conducts the whirl separating on the radiating waste liquid, so that the particle impurities can be separated from the radiating waste liquid, and concentrate liquid with the particle impurities and clear liquid can be obtained; (iii) the obtained concentrate liquid with the particle impurities is sent to the upper cavity body to subside in the ash bucket, and filtering liquid is obtained; (iv) the obtained filtering liquid and the clear liquid are mixed and flow to downstream equipment.

Description

technical field [0001] The invention belongs to the field of nuclear power environmental protection, and relates to a swirl separation method and device that has a long continuous operation period, low radioactive solid waste generation, and can effectively remove particulate impurities in radioactive waste liquid, and specifically relates to an integrated micro-swirl flow separation The invention discloses a method for purifying resin and other particulate impurities in the radioactive waste liquid of a nuclear power plant waste liquid treatment system with a filter and ash hopper, and a device for implementing the method. Background technique [0002] Since the IAEA (International Atomic Energy Organization) published "Minimization of Radioactive Waste at Nuclear Power Plants and Nuclear Fuel Cycle Terminals" (Technical Report Series No. 377), waste minimization has become an important part of radioactive waste management and nuclear safety culture. And to a certain extent...

AI Technical Summary

Problems solved by technology

However, most of these filters are in a radioactive environment, and their filter elements need to be replaced as required after reaching the end of their service life, becoming radioactive waste filter elements that need to be stored in isolation; periodic filter element replacement is not only costly, but also results in a large amount of radioactive solids. It also brings potential nuclear radiation risks to maintenance and replacement work

[0004] The current research on exploring new high-efficiency separation methods for nuclear power plants includes: Chinese patent ZL201010128657.8 discloses a device that uses supercritical water to filter the mixture of fine particles in nuclear power plants; The immersion membrane is used as a device for recovering radioactive solid waste in radioactive equipment in nuclear power plants. Chinese patent ZL 201010272918.3 discloses a method for purifying and filtering the condensate polishing system of nuclear power plants using precision filters, but none of the above methods can effectively solve the problem of radioactivity. Common problems such as secondary pollution of solid waste and long-term stable operation of the device

[0005] At present, cyclones have been widely used in many industries such as petrochemical, biomedicine, and mining coal preparation. Related research includes: Chinese patent ZL 200910045839.6 discloses a method and device for removing particles in coal tar by using a cyclone, Chinese patent ZL 200810042716.2 discloses a method of using a microcyclone to recover MTO (methanol to olefins) quenching water and washing water spent catalyst, but there is currently no research report on the application of a cyclone to purify radioactive waste in the nuclear power industry

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