Rotating arc thermal plasma catalytic cracking high-concentration VOC tail gas treatment system and method

Abstract

The invention relates to a rotating arc thermal plasma catalytic cracking high-concentration VOC tail gas treatment system and method, and the rotating arc thermal plasma catalytic cracking high-concentration VOC tail gas treatment system comprises an activated carbon alternating adsorption device, a hot air alternating desorption device, a rotating arc thermal plasma high-concentration waste gascracking catalytic device, a DBD plasma advanced treatment device and a water spraying device. According to the invention, through the activated carbon alternating adsorption device and the hot air alternating desorption device, and through parallel alternating work, one path realizes that low-concentration (10 mg / m<3>) waste gas is firstly adsorbed and then directly discharged, and the other pathdesorbs the other path of adsorption module with 1% of hot air flow rate, so that the low-concentration waste gas with large air volume is converted into high-concentration waste gas with small air volume for treatment, thereby providing possibility for greatly reducing the scale of plasma equipment and reducing investment cost.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a system and method for treating high-concentration VOC tail gas by catalytic cracking of rotating arc thermal plasma. Background technique [0002] With the increasing development of human industry, the use of VOCs is increasing, and the pollution of the exhaust gas to the atmospheric environment is also increasing. 3 ) emissions, VOCs exhaust gas is difficult to degrade, so low-temperature plasma, as a high-energy green exhaust gas treatment technology, is more and more applied to exhaust gas treatment systems, and DBD discharge low-temperature plasma is due to high electron energy, Strong bond breaking ability is considered to be one of the most effective exhaust gas treatment technologies. [0003] However, due to the large-scale technical difficulty and high equipment cost of the DBD discharge low-temperature plasma device, it is only suitable for processing ord...

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Problems solved by technology

[0003] However, due to the large-scale technical difficulty and high equipment cost of the DBD discharge low-temperature plasma device, it is only suitable for processing ordinary low-concentration (3 ) exhaust gas has a better effect, and for high-concentration exhaust gas, the combustion method is usually used at present, and the most widely used method is the RTO method.

However, the start-up time of this method is too long, it is inconvenient and flexible to operate, the equipment is flexible, the treatment is not thorough enough, the cost and energy consumption are also high, and the exhaust gas with fluctuating concentration needs a certain amount of combustion, and the degradation rate of the exhaust gas is not stable enough.

[0004] Thermal plasma discharge is currently an effective measure to treat high-concentration exhaust gas, but the limited air volume of a single reactor limits its application, etc.

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