BP price-adjusting, degassing and acid-adjusting integrated device and method in Purex process

A technology for acid regulation and process, applied in Purex process BP price regulation, acid regulation integrated device, degassing field, can solve the problems of excessive consumption of nitrogen oxides, poor economy, complicated operation, etc., to reduce consumption and save The effect of post-processing cost and equipment simplification

Inactive Publication Date: 2015-07-22
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problems that the uranium and plutonium separation section of the Purex process uses nitrogen oxides to adjust the price, there are many equipments, the actual operation i...

Method used

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  • BP price-adjusting, degassing and acid-adjusting integrated device and method in Purex process
  • BP price-adjusting, degassing and acid-adjusting integrated device and method in Purex process

Examples

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Effect test

Embodiment 1

[0022] Using the Purex process BP price adjustment, degassing, and acid adjustment integrated device and method of the present invention to treat a certain 1BP feed liquid, the reducing agent in the 1BP feed liquid is dimethyl hydroxylamine-methyl Hydrazine salt-free reducing agent, the specific steps are as follows:

[0023] (1) Through the BP feed liquid inlet, NO 2 The feed port and the feed pipeline are continuously fed with BP feed liquid and NO 2 , air, let NO 2 The oxidation-reduction reaction occurs in countercurrent contact with the reducing agent, and the NO produced by the reaction is quickly absorbed by the O in the air. 2 Oxidation to NO 2 , continue to undergo oxidation-reduction reaction with the reducing agent, so as to realize the price adjustment of Pu, and the excess nitrogen oxides are transported to the exhaust gas treatment system through the exhaust gas outlet;

[0024] (2) After completing the price adjustment of Pu, stop feeding NO 2 , continue to...

Embodiment 2

[0028] Using the Purex process BP price adjustment, degassing, and acid adjustment integrated device and method of the present invention to process a certain 2BP feed liquid, the specific steps are as follows:

[0029] (1) Through the BP feed liquid inlet, NO 2 The feed port and the feed pipeline are continuously fed with BP feed liquid and NO 2 , air, let NO 2 The oxidation-reduction reaction occurs in countercurrent contact with the reducing agent, and the NO produced by the reaction is quickly absorbed by the O in the air. 2 Oxidation to NO 2 , continue to undergo oxidation-reduction reaction with the reducing agent, so as to realize the price adjustment of Pu, and the excess nitrogen oxides are transported to the exhaust gas treatment system through the exhaust gas outlet;

[0030] (2) After completing the price adjustment of Pu, stop feeding NO 2 , continue to pass air into the feed liquid through the feed pipe to remove excess nitrous acid in the feed liquid, convert...

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Abstract

The invention relates to a nuclear fuel reprocessing method in order to solve the problems that more devices are adopted, actual operation is complex, excessive nitric oxide is consumed, the economy is low and the like when a U/Pu separation section of the Purex process adopts nitric oxide for price adjustment, and provides a BP price-adjusting, degassing and acid-adjusting integrated device and method in a Purex process. The device comprises a filler column and a feed liquid receiving tank, wherein a BP feed liquid inlet and an NO2 feed port are formed in the filler column, a tail gas outlet is formed in the top, and a feed pipe extending to the feed liquid receiving tank is arranged on the feed liquid receiving tank. The method comprises steps of Pu price adjustment, nitrous acid removal and acid adjustment. According to the BP price-adjusting, degassing and acid-adjusting integrated device in the Purex process, nitric oxide price adjustment equipment is successfully simplified, the overall design of the adopted technological process is remarkably optimized, the nitric oxide consumption and the tail gas treatment quantity are remarkably reduced, the economy is remarkably improved, and a large quantity of costs is saved.

Description

technical field [0001] The invention relates to a nuclear fuel reprocessing method, in particular to a Purex process BP price adjustment, degassing, and acid adjustment integrated device and method. Background technique [0002] In the field of nuclear industry, the Purex process is widely used as a classic nuclear fuel reprocessing process. In the Purex process, Pu products at each stage are represented by BP (including 1BP and 2BP). [0003] In the uranium-plutonium separation section of the Purex process, it is necessary to use a reducing agent to reduce Pu(IV) in the organic phase to Pu(III), so that Pu enters the water phase, while uranium still exists in the organic phase in the U(VI) state, thus Realize the separation of uranium and plutonium. The Pu crude product 1BP feed liquid obtained in the uranium-plutonium separation section contains Pu(III) and the remaining reducing agent. In the Pu purification cycle, it is necessary to oxidize the remaining reducing agent...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B59/00G21C19/46
CPCY02E30/30Y02P10/20Y02W30/50
Inventor 左臣郑卫芳晏太红何辉李高亮常尚文矫海洋李传博袁中伟
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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