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System and method for treating VOCs (Volatile Organic Chemicals) by excimer optical coupling catalysis means

An excimer and optical coupling technology, applied in the field of VOCs processing system based on excimer optical coupling catalytic means, can solve the problems of high cost, secondary pollution, etc., reduce energy loss, reduce operating energy consumption, and have a reasonable design Effect

Active Publication Date: 2020-09-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the ubiquitous high cost and secondary pollution problems in the recovery process of VOCs, the present invention provides a system and method for treating VOCs by means of excimer light-coupling catalytic means, which can achieve deep purification of industrial source VOCs and truly achieve energy saving and emission reduction the goal of

Method used

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  • System and method for treating VOCs (Volatile Organic Chemicals) by excimer optical coupling catalysis means
  • System and method for treating VOCs (Volatile Organic Chemicals) by excimer optical coupling catalysis means
  • System and method for treating VOCs (Volatile Organic Chemicals) by excimer optical coupling catalysis means

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Embodiment 2

[0036] When using the method of Example 1 to treat VOCs, the VOCs components mainly include: toluene: 600mg / m 3 , Ethyl acetate: 1300mg / m 3 , Formaldehyde 800mg / m 3 ; The catalyst is 15% ZrO 2 -TiO 2 , The wavelength of excimer light is 245nm, the flue gas humidity is controlled at 12%, the high-voltage power supply is adjusted to 15KV, and the purification efficiency of VOCs is as high as 99.1%.

Embodiment 3

[0038] When using the method of Example 1 to treat VOCs, the VOCs components mainly include: toluene: 950mg / m 3 , Ethyl acetate: 600mg / m 3 , Formaldehyde 1200mg / m 3 ; The catalyst is 10% SnO 2 -TiO 2 , The wavelength of excimer light is 222nm, the flue gas humidity is controlled at 12%, the high-voltage power supply is adjusted to 11KV, and the VOCs purification efficiency is as high as 98.5% after testing.

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Abstract

The invention discloses a system and a method for treating VOCs (Volatile Organic Chemicals) by an excimer optical coupling catalysis means. Removing particles in the industrial waste gas through a dust remover and a Hepa filter screen; after being fully mixed with water vapor and passing through a catalyst layer, O2 and H2O generate active substances such as O3 and. OH free radicals under the synergistic effect of excimer light and a catalyst, then VOCs are thoroughly converted into CO2 and H2O, and finally harmless treatment of industrial waste gas is achieved; a substrate of the catalyst isTiO2 existing in an anatase form, and a cocatalyst is one or a compound of ZnO, SnO2, ZrO2, g-C3N4 and g-C3N4; the utilization rate of energy is effectively improved, the complexity of the system isreduced, and the operation and maintenance costs of the VOCs recovery system are reduced. The method has the characteristics of high treatment capacity, high purification rate and the like, auxiliaryheating equipment is not needed in the operation process, the energy consumption loss of the system can be reduced, the operation cost is reduced, and secondary pollution is avoided.

Description

Technical field [0001] The invention belongs to the field of treatment of volatile organic gas compounds (VOCs) in industrial waste gas, and specifically relates to a system and method for treating VOCs based on an excimer photo-coupled catalytic means. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs for short) are more common and ubiquitous air pollutants in the atmosphere. Common components are aromatic hydrocarbons, esters, ketones, ethers and so on. Mainly from industrial production processes, such as petrochemicals, pharmaceuticals, pesticides, printing, artificial leather, shoemaking, paints and coatings and other industries emissions. VOCs have strong volatility, diffusivity and chemical toxicity, and long-term human exposure can cause damage to the internal organs and nervous system. In addition, as a precursor to the formation of ozone and PM2.5, VOCs undergo photochemical reactions under the action of light to cause photochem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/44B01D46/00
CPCB01D53/8687B01D2257/708B01D2255/20707B01D2258/0283B01D2259/80B01D46/62
Inventor 陈磊张早校段培高余云松张锦萍张辰吴小梅
Owner XI AN JIAOTONG UNIV
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