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

A thermal plasma and catalytic cracking technology, applied in the field of ion catalytic cracking high-concentration VOC exhaust gas treatment system, can solve the large-scale technical difficulty of DBD discharge low-temperature plasma device, the application of single-reactor treatment air volume limitation, and the degradation rate of exhaust gas. Insufficient stability, etc., to achieve the effect of flexible switching, less number of reactors, and low cost

Pending Publication Date: 2019-11-29
NANJING SUMAN PLASMA TECH CO LTD
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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 flexibl

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0038] Only the gas supply valve is opened first, and then all the plasma equipment is turned on to generate a flow of active particles to flow back to the waste gas pipeline for pre-cracking and oxidation, and dissolve into the water to achieve efficient spraying.

[0039] Open one way of adsorption and start to absorb and treat the exhaust gas to be discharged to the spray discharge. When the concentration at the outlet of the first pipeline is about to reach the initial concentration, that is, the adsorption is saturated. Close the valve of the pipeline after the exhaust gas treatment of the first way, turn on the heater, and close the air supply valve. Open the desorption channel valve of the first channel to carry out thermal desorption and plasma catalytic cracking process, and at the same time open the waste gas channel valve of the second channel to continue to adsorb the waste gas to be treated; During the blank time after the initial concentration, adjust the gas supp...

Embodiment 2

[0041] For low-concentration gases that are particularly easy to oxidize and degrade, turn on all plasma equipment to generate active particle flow back to the waste gas pipeline for pre-cracking and oxidation, dissolve it in water to achieve efficient spraying, and open one way to adsorb and start adsorption treatment. Waste gas is discharged to spraying Emission, continuous reaction in adsorption, this process can realize the degradation of exhaust gas without switching.

Embodiment 3

[0043] It can be carried out in the production shutdown stage without waste gas, desorption maintenance, all pipeline valves are closed after adsorption, all desorption pipeline valves are opened, and then all plasma equipment is turned on to treat residual waste gas, generate active particle airflow and dissolve it into water to achieve efficient spraying Deep governance.

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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...

Claims

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Application Information

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IPC IPC(8): B01D53/32B01D53/86B01D53/02B01D53/44
CPCB01D53/02B01D53/323B01D53/8687B01D2253/102B01D2257/708B01D2259/4009B01D2259/818
Inventor 万京林戴阳
Owner NANJING SUMAN PLASMA TECH CO LTD
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