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A chlorine-containing waste gas treatment system

A technology for waste gas treatment and chlorine gas, which is applied in gas treatment, separation methods, and dispersed particle separation.

Active Publication Date: 2020-10-09
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, chlorine-containing waste gas is mainly treated by lye absorption, which requires a large amount of lye, and lye absorption and treatment of exhaust gas after chlorination of spent fuel will produce a large amount of radioactive waste
The treatment of chlorine-containing exhaust gas has brought certain difficulties to the development of dry reprocessing of spent fuel

Method used

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  • A chlorine-containing waste gas treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] The operation steps are as above, except that the structural parameters are different. The specific parameters are: start to use the chlorine-containing waste gas treatment system provided by the present invention at room temperature, and start to feed low-temperature nitrogen to make the condenser 5 within 30 minutes. down to -80°C. Then reduce the flow of low-temperature nitrogen, and maintain the condenser 5 and the liquid chlorine storage tank 43 at about -80°C.

[0090] Flow rate is 1L / min chlorine and nitrogen mixed gas from the cold gas inlet of condenser 5 (the junction of condenser 5 and the twelfth pipeline 34), the mixed gas temperature is-60 ℃, wherein chlorine and nitrogen gas volume The ratio is 1:3. The temperature of the condenser 5 is raised and maintained at about -75°C. The temperature of the waste gas outlet (the connection between the third pipeline 25 and the condenser 5 ) is about -70°C to -75°C. The chlorine content in the exhaust gas (ie the ...

Embodiment 2

[0092] The operation steps are as above, except that the structural parameters are different. The specific parameters are: start to use the chlorine-containing waste gas treatment system provided by the present invention at room temperature, and start to feed low-temperature nitrogen to make the condenser 5 within 30 minutes. down to -80°C. Then reduce the flow of low-temperature nitrogen, and maintain the condenser 5 and the liquid chlorine storage tank 43 at about -80°C.

[0093] The chlorine and nitrogen gas mixture that flow rate is 4L / min begins to pass into from the cold gas inlet of condenser 5 (condenser 5 and the connection of the twelfth pipeline 34), and the temperature of gas mixture is-60 ℃, wherein chlorine gas and nitrogen gas volume The ratio is 2:3. The temperature of the condenser 5 rises and maintains at about -72°C, and the temperature of the liquid chlorine storage tank 43 rises and maintains at -70°C to -72°C. The temperature of the waste gas outlet (th...

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Abstract

The invention belongs to the technical field of high-temperature molten salt metallurgy, and particularly relates to a chlorine-containing waste gas treatment system which is used for treating first waste gas generated by a chlorination reactor, and the first waste gas is a chlorine-containing waste gas. The system comprises a liquid chlorine gasification device, an alkali liquor absorption device, a chlorination reactor, a condenser, a chlorine storage tank, a negative pressure exhaust device and a liquid nitrogen storage tank, the condenser condenses chlorine in the first waste gas into liquid chlorine and outputs the liquid chlorine; the liquid chlorine gasification device converts the liquid chlorine into chlorine and sends the chlorine to the chlorine storage tank; the chlorine storage tank converts the chlorine into liquid chlorine for storage and generates chlorine which is sent to the chlorination reactor to participate in reaction; the alkali liquor absorption device treats second waste gas exhausted by the condenser into third waste gas and sends the third waste gas to the negative pressure exhaust device to be exhausted, and the second waste gas is condensed first wastegas; the liquid nitrogen storage tank provides the liquid nitrogen for the condenser, and nitrogen generated by the liquid nitrogen is sequentially used for cooling the condenser, heating the liquid chlorine gasification device and cooling the chlorine storage tank to participate in reaction in the chlorination reactor.

Description

technical field [0001] The invention belongs to the technical field of high-temperature molten salt metallurgy, and in particular relates to a chlorine-containing waste gas treatment system. Background technique [0002] In the chlorination metallurgy process in metallurgy, chlorination reagents are often added to the reactants to convert the oxides of the metal to be extracted into chlorides. Chlorinating agents are very active and can convert oxides into chlorides. High-temperature molten salt is often used as a chemical reaction medium in the metallurgical industry because of its good electrical conductivity, low vapor pressure, low viscosity, and large heat capacity. After the oxide is chlorinated, it is relatively easy to achieve the purposes of metal separation, purification, enrichment and refining in the molten salt medium. Therefore, chlorination metallurgy has been widely used in the field of metallurgy. [0003] Chlorine gas is often used as a chlorination agent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/68B01D46/00
CPCB01D46/00B01D53/002B01D53/26B01D53/68B01D53/78B01D2257/2025
Inventor 肖益群何辉王长水贾艳虹林如山孟照凯
Owner CHINA INSTITUTE OF ATOMIC ENERGY