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Device and method for reducing fluoride through thermal plasma

A thermal plasma and plasma torch technology, which is applied in the field of devices for ion reduction of fluoride, can solve problems such as secondary pollution, and achieve the effects of less secondary pollution, easy industrialization and low production cost

Pending Publication Date: 2022-04-08
SOUTHWESTERN INST OF PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a device and method for thermal plasma reduction of fluoride, which has the characteristics of high production efficiency and short industrial process, belongs to a one-step rapid reduction method, and can solve the environmental problems caused by the intermediate product of the existing fluoride treatment method. Secondary pollution and other problems reduce the treatment cost and have the potential for industrial application

Method used

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  • Device and method for reducing fluoride through thermal plasma
  • Device and method for reducing fluoride through thermal plasma

Examples

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Effect test

Embodiment 1

[0040] In this embodiment, carbon tetrafluoride CF 4 , using thermal plasma to reduce carbon tetrafluoride to generate simple carbon, which specifically includes the following steps:

[0041] Step 1. Vacuumize the reaction chamber

[0042] Pump the vacuum in the reaction chamber to less than 5×10 -3 Pa, until it reaches 2~3×10 -3 After Pa, fill the reaction chamber with argon to 10 3 Pa, its purpose is to remove the air in the reaction chamber and prevent the product from being oxidized during the reduction reaction;

[0043] Step 2, Turn on and adjust the DC arc plasma torch until it runs stably

[0044] Turn on the DC arc plasma torch, the working gas is argon, and the flow rate is 3m 3 / h, adjust the power of the plasma torch to 50kW until it runs stably;

[0045] Step 3, mixing gaseous fluoride and hydrogen into the plasma torch for reduction treatment

[0046] The carbon tetrafluoride gas to be reduced and the hydrogen gas are uniformly mixed at a flow rate of 20sc...

Embodiment 2

[0051] In this example, sulfur hexafluoride SF 6 As the fluoride to be reduced, the reduction of fluoride is carried out, which specifically includes the following steps:

[0052] Step 1. Vacuumize the reaction chamber

[0053] Pump the vacuum in the reaction chamber to less than 5×10 -3 Pa, until it reaches 2~3×10 -3 After Pa, fill the reaction chamber with argon to 10 3 Pa, its purpose is to remove the air in the reaction chamber and prevent the product from being oxidized during the reduction reaction;

[0054] Step 2, Turn on and adjust the DC arc plasma torch until it runs stably

[0055] Turn on the DC arc plasma torch, the working gas is argon, and the flow rate is 3m 3 / h, adjust the power of the plasma torch to 50kW until it runs stably;

[0056] Step 3, mixing gaseous fluoride and hydrogen into the plasma torch for reduction treatment

[0057] The sulfur hexafluoride gas to be reduced and the hydrogen gas are uniformly mixed at a flow rate of 20sccm and 30sccm...

Embodiment 3

[0062] In this example, tungsten hexafluoride WF 6 As the fluoride to be reduced, the reduction of fluoride is carried out, which specifically includes the following steps:

[0063] Step 1. Vacuumize the reaction chamber

[0064] Pump the vacuum in the reaction chamber to less than 5×10 -3 Pa, until it reaches 2~3×10 -3 After Pa, fill the reaction chamber with argon to 10 3 Pa, its purpose is to remove the air in the reaction chamber and prevent the product from being oxidized during the reduction reaction;

[0065] Step 2, Turn on and adjust the DC arc plasma torch until it runs stably

[0066] Turn on the DC arc plasma torch, the working gas is argon, and the flow rate is 3m 3 / h, adjust the power of the plasma torch to 50kW until it runs stably;

[0067] Step 3, mixing gaseous fluoride and hydrogen into the plasma torch for reduction treatment

[0068] The tungsten hexafluoride gas and hydrogen gas to be reduced are uniformly mixed at a flow rate of 20sccm and 30sccm...

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Abstract

The invention belongs to the technical field of thermal plasma application, and particularly discloses a device and method for reducing fluoride through thermal plasmas, the device comprises a direct current plasma torch, a reduction reaction chamber, a reaction chamber, a reaction chamber support and a collecting tank, the lower portion of the reaction chamber is fixed to the reaction chamber support, and the bottom of the reaction chamber is connected with the collecting tank in a sealed mode; the reduction reaction chamber is located in the reaction chamber, the reduction reaction chamber is in sealed connection with the reaction chamber, and the top of the reduction reaction chamber is fixedly connected with the direct-current arc plasma torch. The method has the characteristics of high production efficiency, short industrial process and the like, belongs to a one-step rapid reduction method, can solve the problem that intermediate products in an existing fluoride treatment mode cause secondary pollution to the environment and the like, reduces the treatment cost, and has the potential of industrial application.

Description

technical field [0001] The invention belongs to the technical field of thermal plasma application, and in particular relates to a device and method for reducing fluoride by thermal plasma. Background technique [0002] Fluorides are mostly highly toxic, and their treatment and disposal are the key issues to be solved in this field, and the investment cost is also high. The development and breakthrough of fluoride reprocessing technology can promote the transformation of fluoride materials into treasures. It is of great significance to promote the development of this field, which is mainly reflected in the following three aspects: First, breaking the barriers to the development of fluoride reprocessing technology can improve my country's technical application level in this field and enhance international competitiveness; second, it can promote the development of fluoride reprocessing technology. The development of the chemical industry will reduce the operating costs of enterpr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/08B01J19/14
Inventor 陈伦江童洪辉程昌明金凡亚但敏聂军伟黄熠
Owner SOUTHWESTERN INST OF PHYSICS
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