Integrated thermochemical treatment device for low-and-intermediate level radioactive wastes

A processing device and thermochemical technology, which is applied in the field of medium and low radioactive waste processing equipment, can solve the problems of high thermal ignition reduction rate, insufficient combustion, easy blockage of pyrolysis products, etc., and achieve high volume reduction rate, fly ash and smoke amount Less, reduce the effect of nuclear radioactive pollution

Pending Publication Date: 2018-06-29
青岛天和清原科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, seek to design a thermochemical integrated treatment device for low- and medium-level radioactive waste, and solve the problem of insufficient combustion and easy blockag

Method used

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  • Integrated thermochemical treatment device for low-and-intermediate level radioactive wastes
  • Integrated thermochemical treatment device for low-and-intermediate level radioactive wastes
  • Integrated thermochemical treatment device for low-and-intermediate level radioactive wastes

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The main structure of the thermochemical integrated processing device for low- and medium-level radioactive wastes involved in this embodiment includes a pyrolysis device 1 and a combustion device 2, and the pyrolysis device 1 and the combustion device 2 adopt an integrated structure that is directly connected without pipes; The main structure of the device 1 includes a sealed feed section 101, a large mouth storage section 102, a dynamic seal 103, a drive motor 104, a screw propeller 105, a variable diameter feed section 106, a heating device 107, a pyrolysis delivery section 108 and a temperature control unit. Instrument 109; the input end of the horizontally arranged tubular screw propeller 105 is vertically provided with a tubular sealed feed section 101, and the front end of the screw propeller 105 is provided with a large-mouth storage section 102 for temporarily storing low-medium-level combustible organic waste, The large-mouth material storage section 102 and th...

Embodiment 2

[0037] The difference between this implementation and Example 1 is that the ratio of the diameter of the gas-liquid combustion chamber to the diameter of the solid combustion chamber is 2.2. The specific process steps of using the low-level and medium-level waste thermochemical integrated treatment device involved in this embodiment to process low-level and low-level combustible organic waste are different from Example 1 in that the speed of the drive motor in step (1) is 4r / min In the step (2), the temperature of the pyrolysis conveying section 108 is set to be 600°C; in the step (8), 0.4% of the radioactive substances are discharged to the flue gas post-treatment system through the flue gas outlet 201 along with the flue gas produced by combustion , 99.6% of the radioactive substances are discharged together with the residue through the slag outlet 205 at the lower end of the solid combustion chamber 204, sealed up and processed in a unified manner.

Embodiment 3

[0039] The difference between this implementation and Example 1 is that the ratio of the diameter of the gas-liquid combustion chamber to the diameter of the solid combustion chamber is 1.2, the equipment is more compact, the floor space is small, and it is suitable for projects with tight land use; The specific process steps of low-level combustible organic waste in the treatment of low-level waste thermochemical integrated treatment device are different from Example 1 in that: the rotating speed of the driving motor in step (1) is 5r / min; The temperature of the pyrolysis conveying section 108 is 700°C; in step (8), 1% of the radioactive substances are discharged to the flue gas post-treatment system through the flue gas outlet 201 along with the flue gas produced by combustion, and 99% of the radioactive substances are processed with the residue Discharge through the slag outlet 205 at the lower end of the solid combustion chamber 204 for unified storage and treatment.

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Abstract

The invention belongs to the technical field of low-and-intermediate level radioactive waste treatment devices, and relates to an integrated thermochemical treatment device for low-and-intermediate level radioactive wastes. The integrated thermochemical treatment device for the low-and-intermediate level radioactive wastes is used for treating organic combustible wastes containing radioactive substances produced by hospitals, scientific research institutions and nuclear power departments, solves the problems of insufficient combustion, easiness in blocking a pipeline through pyrolysis products, and higher clinker ignition loss, and realizes volume-reduction innocent treatment. A main body structure of the integrated thermochemical treatment device for the low-and-intermediate level radioactive wastes comprises a pyrolysis device and a combustion device, and is of an integrated structure; the pyrolysis products fall into a solid combustion chamber through a fire grate so as to be firedagain, so that the clinker ignition loss is reduced; a tapered feeding section realizes a sealing function; the diameter of a gas-liquid combustion chamber is larger than the diameter of the solid combustion chamber, so that the flue gas wind speed is retarded, and the fly ash quantity is reduced; and the integrated thermochemical treatment device for the low-and-intermediate level radioactive wastes is simple in overall structure, reliable in principle, compact in device, less in occupied area, high in volume reduction rate, good in curing effect, low in secondary pollution, friendly to an application environment, low in investment and operation cost, energy-saving, environmental-friendly, favorable in economic benefit and wide in market prospect.

Description

Technical field: [0001] The invention belongs to the technical field of medium and low radioactive waste treatment equipment, and relates to a waste treatment device, in particular to a thermochemical integrated treatment device for low and medium radioactive waste, which is used for treating radioactive substances produced by hospitals, scientific research institutions and nuclear power units Low- and medium-level radioactive organic combustible waste, to achieve volume reduction and harmless treatment of low- and medium-level radioactive waste. Background technique: [0002] From the technical level, radioactive waste is mainly divided into two categories: high radioactivity and medium and low radioactivity. High-level radioactive waste mainly includes spent fuel and its disposal products produced by nuclear fuel after power generation; medium and low-level radioactive waste generally includes nuclear power plant polluting equipment, testing equipment, hydration systems du...

Claims

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Application Information

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IPC IPC(8): F23G5/027F23G5/12F23G5/44F23G5/50
CPCF23G5/027F23G5/12F23G5/444F23G5/50F23G2900/508F23G2207/20F23G2203/8013F23G2205/121
Inventor 张伟孙强赵小鋆管颖
Owner 青岛天和清原科技有限公司
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