Plasma treatment device and method for removing nitrogen oxides and adsorbing radionuclides

Through the device connected to the L-type plasma furnace and the second combustion chamber and the low-temperature deep-cooling removal system, combined with multiple plasma incineration and adsorption materials, the emission problems of nitrogen oxides and radionuclides are solved, and the near-zero emissions and environmental protection performance are improved.

CN120452873APending Publication Date: 2025-08-08HAINAN NUCLEAR POWER CO LTD
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Patent Information

Application Number
CN202510554235.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-29
Publication Date
2025-08-08

AI Technical Summary

Technical Problem

During plasma incineration to treat radioactive waste, nitrogen oxide emission concentration is high, and radionuclides are prone to volatilization into flue gas, resulting in environmental pollution and health threats, making it difficult to meet emission standards.

Method used

The device connected to the L-type plasma furnace and the second combustion chamber is adopted, combined with a low-temperature deep-cooling removal system and adsorbent materials, and the emission of nitrogen oxides and radionuclides are reduced through two plasma incineration, denitrification, heat exchange, dust removal and low-temperature deep-cooling treatment.

Benefits of technology

Effectively remove nitrogen oxides, reduce the volatility risk of radionuclides, achieve near-zero emissions, ensure emissions meet standards, and protect the environment and public health.

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Abstract

The invention relates to the field of radioactive waste treatment, in particular to a plasma treatment device and method for removing nitrogen oxides and adsorbing radionuclides. According to the device, a plasma furnace is connected with a secondary combustion chamber through a smoke exhaust pipe; a denitration furnace, a heat exchanger, a quench tower, a dust removal cloth bag, a washing tower, a flue gas cooler, a gas-liquid separator and an adsorber are connected behind the secondary combustion chamber; at least two adsorbers are arranged in parallel; one outlet of each adsorber is connected to the electric heater and the induced draft fan; and the other outlet of the adsorber is respectively connected to the plasma furnace and the smoke exhaust pipe. The method comprises the steps that the radioactive waste is incinerated; carrying out melting treatment on inorganic matters generated by incineration treatment; gas generated by incineration treatment enters a secondary combustion chamber to be subjected to secondary plasma incineration treatment; the generated flue gas is subjected to denitration treatment, heat exchange cooling treatment, extremely cold cooling treatment, dust removal treatment and at least two-stage washing treatment; and carrying out low-temperature cryogenic removal treatment, and discharging after heating. According to the invention, zero emission of nitrogen oxides is realized.
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