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System and method for processing PVA product in nuclear power station

A processing system and technology for nuclear power plants, applied in the field of PVA product processing systems in nuclear power plants, can solve the problems of backward processing methods and unsatisfactory volume reduction effect, and achieve the effect of reducing the amount of accumulation and disposal, obvious volume reduction effect and convenient operation.

Inactive Publication Date: 2018-11-13
北京中安吉泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The radiation protection of power stations produces a large number of paper clothing, gas clothing, gas masks, etc., and a large number of film products, mops, rags, head covers, shoe covers and other accessories are also produced during maintenance. These wastes contribute greatly to the solid waste output of power stations. At present, it can only be processed by compression, the processing method is relatively backward, and the capacity reduction effect is not ideal

Method used

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  • System and method for processing PVA product in nuclear power station

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Effect test

Embodiment 1

[0043] Embodiment 1 A kind of nuclear power plant PVA product processing system

[0044] A nuclear power plant PVA product processing system, which: includes a dissolution tank 1, a filter 2, a thermal oxidizer 3 and a quenching tank 4;

[0045]The dissolving 1 is provided with a PVA product input port 5, a dissolved water inlet 6 and a chemical addition port 7;

[0046] The outlet of the solution of the dissolution tank 1 is connected to the inlet of the filter 2 through the first connecting pipe 8. There is a branch 9 on the first connecting pipe 8 and forms a first junction 10 with the branch 9. At the first junction A first reversing valve 11 is provided at 10, a first cooler 12 is provided on the branch 9, and the outlet of the first cooler 12 is connected to an inlet of the dissolution tank 1;

[0047] The filtrate outlet of the filter 2 is connected with the inlet of the thermal oxidizer 3 through the second connecting pipe 13, and the outlet of the thermal oxidizer 3 ...

Embodiment 2

[0059] Embodiment 2 A kind of nuclear power plant PVA product processing method

[0060] The present invention further provides a method for processing PVA products in nuclear power plants, comprising the steps of:

[0061] (1) Dissolving and cooling: Put the PVA protective clothing into the dissolving tank 1, start the solution delivery pump 26 to transport water from the solution tank 25 to the dissolving tank 1, and the dissolving tank 1 is equipped with a level detection system, and the output is equivalent to that of the PLC system Then, when the predetermined liquid level is reached, stop adding liquid. After the water in the dissolving tank 1 is heated to 110° C., the PVA product can be completely dissolved into about 8% PVA solution. During the dissolving process, the continuous operation of the first delivery pump 15 ensures that the mixture is evenly mixed. Once the PVA material dissolves completely, start the metering pump 20, from the chemical storage tank 19, qua...

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Abstract

The invention discloses a system and method for processing a PVA product in a nuclear power station, wherein the system comprises a dissolving tank, a filter, a thermal oxidizer and a quenching tank;the dissolving tank is provided with a PVA product feeding port, a dissolving water inlet and a chemicals feeding port; the solution outlet of the dissolving tank is connected with the filter inlet through a first connecting pipe, a branch is arranged on the first connecting pipe and forms a first connecting point with the connecting pipe, a first reversing valve is arranged at the first connecting point, a first cooler is arranged on the branch, the outlet of the first cooler is connected with one inlet of the dissolving tank; the filter filtrate outlet is connected with the inlet of the thermal oxidizer through a second connecting pipe, the outlet of the thermal oxidizer is connected with the inlet of the quenching tank, and a gas outlet and a liquid outlet are arranged on the quenchingtank. By using the system and method for processing the PVA product, solid radioactive waste accumulation in the nuclear power plant can be effectively reduced, the method has the advantages of simpleprocess and equipment, small occupied area, convenient operation and wide application prospect.

Description

technical field [0001] The invention relates to a nuclear power plant PVA product processing system and method, and belongs to the technical field of nuclear polluted solid waste processing. Background technique [0002] There are two main sources of solid waste generated during the operation of domestic nuclear power plants. One is the concentrated solidified radioactive waste water (usually cement solidified body), and the second is solid waste generated during maintenance and overhaul, including discarded mechanical parts and a large number of personnel. Protective equipment, this type of waste is also known as technical waste. Generally speaking, the annual production of technical waste is about 200 barrels (200L steel drum, 55 gallons), and the volume is about 45m 3 , accounting for about 30-40% of the total radioactive solid waste of nuclear power plants. It can be seen from this that adopting appropriate technical measures to reduce the volume of such waste is an im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/30G21F9/36
CPCG21F9/30G21F9/36
Inventor 徐光平徐俊张环茹
Owner 北京中安吉泰科技有限公司
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