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A supercritical water oxidation reaction system for treating radioactive organic waste liquid

A technology of supercritical water oxidation and organic waste liquid, which is applied in the direction of radioactive pollutants, oxidized water/sewage treatment, special compound water treatment, etc., can solve the problems of easy corrosion of reactors, and achieve the effect of solving corrosion problems

Active Publication Date: 2021-07-09
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of easy corrosion of the reactor in the above-mentioned prior art, the present invention aims to provide a supercritical water oxidation reaction system for treating radioactive organic waste liquid

Method used

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  • A supercritical water oxidation reaction system for treating radioactive organic waste liquid

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Embodiment Construction

[0019] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0020] Such as figure 1 As shown, the supercritical water oxidation reaction system for treating radioactive organic waste liquid according to a preferred embodiment of the present invention includes a first feed tank 1, an oxidation liquid pump 2, a preheater 3, a second feed tank 4, a waste Liquid pump 5, reactor 6, condenser 7 and gas-liquid separator 8, wherein, the reaction medium water and oxidant (such as hydrogen peroxide, etc.) enter the preheating The radioactive organic waste liquid flows out from the second feed tank 4 under the action of the waste liquid pump 5 and mixes with the preheated reaction medium water and oxidant into the reactor 6 for supercritical water oxidation , the reaction product is cooled by the condenser 7 and enters the gas-liquid separator 8 for separation and discharge. In this embodiment, a thermocouple and th...

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Abstract

The invention relates to a supercritical water oxidation reaction system for treating radioactive organic waste liquid. The reactor includes an inner cylinder and an outer cylinder, the inner cylinder defines a reaction chamber, and the outer cylinder circumferentially surrounds the inner cylinder and is located between the outer cylinder and the inner cylinder. The cooling chamber is defined between the cooling chambers, and the cooling water flows in the cooling chamber to cool the inner cylinder; the reactor also includes a spiral electric resistance wire installed and fixed inside the reaction chamber, and the inner part formed by the electric resistance wire is surrounded by The ring chamber area forms a supercritical water oxidation zone, and the reactor also includes an inlet pipe extending into the supercritical water oxidation zone. The non-supercritical water oxidation zone in the reaction chamber forms a subcritical water zone, and the inorganic salts in the reaction product Redissolution takes place in the critical water zone. The invention cools the cylinder wall of the reactor by cooling water and dissolves the inorganic salt in the subcritical water area, effectively solves the problem of corrosion of the cylinder wall by the reaction fluid at high temperature, and ensures long-term safe and stable operation of the system.

Description

technical field [0001] The invention relates to the fields of environmental protection and chemical industry, and more specifically relates to a supercritical water oxidation reaction system for treating radioactive organic waste liquid. Background technique [0002] The main sources of radioactive organic liquid waste include: waste organic solvents, radioactive waste oil, etc. produced in nuclear power plant operation, decommissioning, equipment maintenance and accident handling; waste organic scintillation liquid produced in radiochemical laboratories of relevant research institutes; nuclear fuel cycle facilities Waste solvent extractant, etc. generated by operation. Radioactive organic waste liquid is flammable, volatile, easy to radiation decomposition, thermal decomposition and difficult to biodegrade. [0003] Supercritical Water Oxidation (SCWO for short) is an internationally recognized advanced radioactive organic waste treatment method, which was first proposed b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01D5/00C02F101/30C02F101/00
CPCB01D5/0051B01D5/0057B01D5/009C02F1/72C02F2101/006C02F2101/30C02F2305/02
Inventor 彭红花王帅秦强乔延波马洪军钱正华刘学阳何柳斌施柳青朱贵凤
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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