Low-carbon emission type VOCs purification device and method adopting low-temperature plasma technology

A low-temperature plasma and purification device technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., to achieve the effects of strong adaptability to working conditions, reduced footprint, and compact equipment structure

Pending Publication Date: 2021-11-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Application Information

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Problems solved by technology

[0004] The existing low-temperature plasma VOCs purification technology only takes the ultimate goal of completely degrading VOCs. As one of its main products, carbon dioxide is often emitted directly without treatment.

Method used

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  • Low-carbon emission type VOCs purification device and method adopting low-temperature plasma technology

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Embodiment 1

[0028] Such as figure 1 Shown is a schematic diagram of the device structure of the present invention, a low-carbon emission type VOCs purification device of low-temperature plasma technology, including: gas-liquid phase purification unit one 1, gas-liquid phase purification unit two 2, the gas-liquid phase purification unit two The gas outlet of phase purification unit one 1 is connected with the inlet port of said gas-liquid phase purification unit two 2; said gas-liquid phase purification unit one 1 includes: gas phase VOCs purification chamber one 3 and liquid phase carbon capture Chamber one 4, the gas phase VOCs purification chamber one 3 is placed inside the liquid phase carbon capture chamber one 4; the gas-liquid phase purification unit two 2 includes: gas phase VOCs purification chamber two 5 and liquid phase carbon capture Collection chamber two 6, the gas-phase VOCs purification chamber two 5 is placed inside the liquid-phase carbon collection chamber two 6, the li...

Embodiment 2

[0037] This embodiment provides a low-carbon emission type VOCs purification method of low-temperature plasma technology. VOCs waste gas enters the gas-phase VOCs purification chamber-3 of the gas-liquid phase purification unit-1 through the air inlet 7, and the low-temperature The high-energy electrons generated by the plasma discharge react with the active groups and are transformed into small molecular inorganic substances such as carbon dioxide and water, as well as a small amount of by-products. The purified tail gas enters in the form of microbubbles after gas phase equalization and micropore diffusion. In the liquid-phase carbon capture chamber-4, the carbon dioxide in the tail gas is absorbed by the absorption solution, and the remaining tail gas is collected at the top outlet of the gas-liquid phase purification unit-1, and the gas is intercepted by the demister 21 After carrying the droplets, the booster air pump 23 sends them into the gas-liquid phase purification un...

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Abstract

The invention belongs to the technical field of volatile organic compound treatment, and relates to a low-carbon emission type VOCs purification device adopting a low-temperature plasma technology, which comprises a first gas-liquid phase purification unit and a second gas-liquid phase purification unit, and a gas outlet of the first gas-liquid phase purification unit is connected with a gas inlet of the second gas-liquid phase purification unit; the first gas-liquid phase purification unit comprises a first gas-phase VOCs purification chamber and a first liquid-phase carbon capture chamber, and the first gas-phase VOCs purification chamber is arranged in the first liquid-phase carbon capture chamber; the second gas-liquid phase purification unit comprises a second gas-phase VOCs purification chamber and a second liquid-phase carbon capture chamber, and the second gas-phase VOCs purification chamber is arranged in the second liquid-phase carbon capture chamber. According to the device disclosed by the invention, the removal of carbon dioxide in a final product is considered while the VOCs are efficiently degraded, and the low-carbon emission target of a VOCs degradation technology can be realized; meanwhile, the low-temperature plasma technology and the absorption technology are organically combined, the equipment structure is compact, and the occupied area is reduced.

Description

technical field [0001] The invention belongs to the technical field of volatile organic compounds, and in particular relates to a low-carbon emission VOCs purification device and method using low-temperature plasma technology. Background technique [0002] With the rapid development of modern industry, the emission of various types of air pollutants is increasing, among which volatile organic compounds (VOCs) exhaust gas is one of the main air pollutants. The emission of a large amount of VOCs exhaust gas will intensify the photochemical reaction process in the atmosphere, which will lead to the occurrence of air pollution problems such as urban smog and photochemical smog. Traditional VOCs waste gas treatment methods mainly include: adsorption method, thermal decomposition method, catalytic oxidation method, membrane separation method, etc. These methods generally have disadvantages such as low removal efficiency, high energy consumption, and large footprint. In recent yea...

Claims

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Application Information

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IPC IPC(8): B01D53/32B01D53/14
CPCB01D53/323B01D53/1406B01D53/1431B01D53/1475B01D53/1493B01D53/1425B01D2259/818B01D2252/10B01D2257/708Y02A50/20Y02C20/40
Inventor 李晶欣齐立强周紫微陈其豪
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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