Revolving furnace tail gas filter device for manufacturing uranium dioxide from uranium hexafluoride

A technology of uranium dioxide and converter exhaust gas, which is applied in the direction of uranium dioxide, uranium oxide/hydroxide, chemical/physical/physicochemical processes, etc., can solve problems such as filter tube blockage, improve service life and avoid root Fracture effect

Inactive Publication Date: 2015-06-17
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Some uranyl fluoride in powder form is deposited on the outer surface of the filter tube walls, so that the filter tubes gradually become clogged during converter operation

Method used

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  • Revolving furnace tail gas filter device for manufacturing uranium dioxide from uranium hexafluoride
  • Revolving furnace tail gas filter device for manufacturing uranium dioxide from uranium hexafluoride
  • Revolving furnace tail gas filter device for manufacturing uranium dioxide from uranium hexafluoride

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the reaction chamber 1 of the converter is composed of a shell in a vertical position as a whole, and the gaseous uranium hexafluoride UF is fed through the feed nozzle 6 And water vapor is injected into the shell of reaction chamber 1. Uranium hexafluoride UF 6 The hydrolysis reaction with water vapor in reaction chamber 1 produces powdered uranyl fluoride. The uranyl fluoride powder falls to the bottom of reaction chamber 1 and is collected by a feeding screw, which puts it in the reaction chamber 1. The uranyl fluoride formed in solid powder form in the process is conveyed to the inlet of a furnace tube where it is converted to uranium dioxide.

[0027] The hydrolysis reaction of uranium hexafluoride produces gaseous HF in the reaction chamber 1 , and the gaseous HF is discharged out of the reaction chamber 1 by...

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Abstract

The invention belongs to a tail gas filter device, and in particular, relates to a revolving furnace tail gas filter device for manufacturing uranium dioxide from uranium hexafluoride. The device includes at least one tail gas filter unit; each tail gas filter unit includes a head and a filter tube; the filter tube of the tail gas filter unit is positioned inside a reaction chamber; the head of the tail gas filter unit is positioned at the outer side of the top end of the reaction chamber; the bottom end of the filter tube in the reaction chamber is sealed; the head is connected with a tail gas recovery tube, and moreover, the head is also connected with a reverse blowing connecting tube, and the other end of the reverse blowing connecting tube is connected with a reverse blowing pipeline. Adhesive uranyl fluoride UO2F2 particles can be separated from the outer wall of the filter tube, and blocking of the filter tube is effectively cleaned; through arrangement of a pull rod, root fracture of the filter pipe can be effectively avoided, and the service life of the filter tube is improved.

Description

technical field [0001] The invention belongs to a tail gas filter device, in particular to a converter tail gas filter device for producing uranium dioxide from uranium hexafluoride. Background technique [0002] Gaseous uranium hexafluoride UF 6 Manufacture of uranium dioxide UO 2 The method is called the dry method, and its core equipment is a converter, including a vertically arranged reaction chamber, uranium hexafluoride UF 6 And water vapor is sprayed into the reaction chamber at a temperature of 170 ° C, and uranium hexafluoride is converted into powdered form of uranyl fluoride UO by hydrolysis reaction 2 f 2 and HF in gaseous form: [0003] UF 6 +2H 2 O→UO 2 f 2 +4HF [0004] Uranyl fluoride UO 2 f 2 Descends and deposits at the bottom of the reaction chamber, is conveyed to the converter inlet by a feed screw, uranyl fluoride UO 2 f 2 Conversion to uranium dioxide UO by defluorination reduction reaction in converter 2 , Gas mixtures such as HF gas, wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/24B01D46/42C01G43/025B01J19/00
Inventor 江保军李顺祥孙瑞平
Owner CHINA NUCLEAR POWER ENG CO LTD
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