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A high-temperature incineration and solidification method for radioactive waste resin plasma

A radioactive waste resin and plasma technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems that can not completely solve the problem of resin degradation combustible gas, reduce the volume of waste resin, unfavorable long-term disposal, etc., to achieve the final disposal and leaching rate The effect of low and stable product

Inactive Publication Date: 2012-10-10
SOUTHWESTERN INST OF PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent 02816870.4, "Melt volume reduction device for waste resin and volume reduction method using the device" mainly introduces a waste resin volume reduction device, which crushes waste resin, heats it into a high-viscosity state, compresses Reducing the volume of waste resin cannot completely solve the problems of resin degradation and flammable gas generation
[0006] Chinese patent 200810246540.2, "A method for solidifying boron-containing radioactive waste resin cement" mainly introduces a method for solidifying boron-containing radioactive waste resin cement in nuclear power plants. The resin and cement are mixed and stirred in a certain proportion and then solidified. Cracks and other problems are not conducive to long-term disposal

Method used

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  • A high-temperature incineration and solidification method for radioactive waste resin plasma
  • A high-temperature incineration and solidification method for radioactive waste resin plasma
  • A high-temperature incineration and solidification method for radioactive waste resin plasma

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Embodiment 1

[0026] The radioactive waste resin plasma high-temperature incineration solidification method of the present invention comprises the following steps:

[0027] Step 1. Mix waste resin and curing agent according to the mass ratio of 7:1, and heat the mixture at 1300°C. The organic components in the waste resin are decomposed to generate flammable gas; the inorganic components and radionuclides in the waste resin, together with the curing agent, are melted at the above-mentioned high temperature, and the slag is collected, and a stable glass body is obtained after the slag is cooled. The curing agent may be borosilicate. The heating operation can be performed in a plasma melting furnace, and the slag collection can be completed through a slag collector, which is common knowledge to those skilled in the art.

[0028] Step 2. Mix the combustible gas described in step 1 with air, the volume ratio of the combustible gas and air is 2.5:1; the mixture of the above combustible gas and ...

Embodiment 2

[0039] Such as figure 1 As shown, the difference between this embodiment and embodiment 1 is that the fly ash generated by combustion in step 2 and the fly ash generated by dust removal in step 3 are returned to step 1 for slag collection to avoid secondary pollution.

Embodiment 3

[0041] This embodiment includes the following steps:

[0042] Step 1. Mix the waste resin and the curing agent according to the mass ratio of 10:1, and heat the above mixture at a temperature of 1340°C. The organic components in the waste resin are decomposed to generate flammable gas; the inorganic components and radionuclides in the waste resin, together with the curing agent, are melted at the above-mentioned high temperature, and the slag is collected, and a stable glass body is obtained after the slag is cooled.

[0043] Step 2. Mix the combustible gas described in step 1 with air, the volume ratio of the combustible gas and air is 2:1; the mixture of the above combustible gas and air is ignited in a combustion chamber with a temperature of 1150° C. The air is sent in and out to support the combustion, so as to ensure the full combustion of the flammable gas and produce smoke after combustion.

[0044] Step 3. Cool the flue gas generated in step 2 to 625°C, and then filt...

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Abstract

The invention belongs to the plasma waste treatment technology field and relates to a high-temperature incineration and solidification method for radioactive waste resin plasma. The method comprises the following steps: mixing a waste resin with a curing agent and heating the obtained product, with organic ingredient generating combustible gas and inorganic ingredient collecting slag; cooling the obtained product to form a vitreous body; subjecting the combustible gas and air to co-combustion to generate fume; cooling the generated fume and filtering out dust; spraying lye into the obtained product, removing the dust, and cooling the fume; and heating the fumes and discharging the remaining fumes. The method in the invention solves technology problems of a small volume-reduction ratio and unstable products in technology of the prior art, and achieves beneficial effects of a large volume-reduction ratio and stable products.

Description

technical field [0001] The invention belongs to the technical field of plasma waste treatment, and relates to a high-temperature plasma incineration and solidification method for radioactive waste resin. Background technique [0002] At present, plasma technology has been widely used in machinery, metallurgy, materials and other fields. The application of plasma technology to waste treatment is a new process developed in the past two decades. Plasma treatment of waste technology is to use the high-temperature thermal plasma generated by the plasma torch to quickly decompose and destroy the waste, in which the organic matter is pyrolyzed into flammable small molecular substances, and the inorganic matter is melted at high temperature to form a vitreous residue. This technology has the characteristics of fast reaction speed, low secondary pollution, and wide application range. It overcomes the shortcomings of traditional treatment technologies such as incineration and chemical...

Claims

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Application Information

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IPC IPC(8): G21F9/28G21F9/32
Inventor 程昌明童洪辉兰伟林建龙王珂唐德礼赵淳耿少飞刘川东朱海龙
Owner SOUTHWESTERN INST OF PHYSICS
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