Air purification method and system for catalyzing oxidizing and degrading volatile organic compounds (VOCs) and application

An air purification system and catalytic oxidation technology, applied in the field of air purification, can solve problems such as unsatisfactory use effect, failure of activated carbon adsorption and saturation, and inability to remove VOCs.

Pending Publication Date: 2019-10-25
QINGDAO CHUANGQI MAIWO ENVIRONMENTAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the existing air purification devices only use filters to filter and purify the air, but this kind of air purification device cannot remove VOCs in the air, but only filters air dust. For the purification of harmful gases, most of them currently use activated carbon. Adsorption is carried out, but activated carbon is prone to adsorption saturation and failure, and the actual use effect is not ideal

Method used

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  • Air purification method and system for catalyzing oxidizing and degrading volatile organic compounds (VOCs) and application
  • Air purification method and system for catalyzing oxidizing and degrading volatile organic compounds (VOCs) and application
  • Air purification method and system for catalyzing oxidizing and degrading volatile organic compounds (VOCs) and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Pilot test equipment: fan, ultraviolet lamp box (14 ultraviolet lamps, 150W / unit), catalyst box (catalyst volume 100L), connected in sequence with air ducts. The change of temperature can control the change of the concentration of organic gas. The frequency converter of the fan can control the size of the air volume. valve implementation. Sampling ports are set at the inlet and outlet of the equipment to detect the concentration of VOCs.

[0107]The basic experimental process is to volatilize the VOCs with the required concentration by heating in a water bath, and transport them into the pilot test equipment through a fan. inlet and outlet concentrations.

[0108] Taking toluene as the test, 14 UV lamps are fully turned on, and the air volume is adjusted to 450m 3 / h, toluene inlet concentration 50mg / m 3 , the outlet concentration after treatment is 1.6mg / m 3 , degradation efficiency 96.6%; monitoring ozone (O 3 ) concentration light box outlet concentration 175mg...

Embodiment 2

[0111] The above-mentioned pilot plant, ultraviolet lamp ozone generating device + normal temperature catalytic oxidation degradation VOC air purification system.

[0112] Taking ethyl acetate as an example test, 14 UV lamps are fully turned on, and the air volume is 450m 3 / h, inlet concentration 38mg / m 3 , the outlet concentration after treatment is 2.86mg / m 3 , degradation efficiency 92.47%; monitoring ozone (O 3 ) Concentration light box outlet concentration 170mg / m 3 , the outlet concentration of the catalytic reaction device is 0.05mg / m 3 .

Embodiment 3

[0114] The above-mentioned pilot plant, ultraviolet lamp ozone generating device + normal temperature catalytic oxidation degradation VOC air purification system.

[0115] Taking xylene as an example test, 14 UV lamps are fully turned on, and the air volume is 450m 3 / h, inlet concentration 26mg / m 3 , the outlet concentration after treatment is 1.36mg / m 3 , degradation efficiency 94.77%; monitoring ozone (O 3 ) Concentration light box outlet concentration 170mg / m 3 , the outlet concentration of the catalytic reaction device is 0.03mg / m 3 .

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Abstract

The invention discloses an air purification method and system for catalyzing oxidizing and degrading volatile organic compounds (VOCs) and application. The air purification method includes the steps that air containing the VOCs enters an ozone generation device through an air leading device, free oxygen free radicals and ozone are produced, and at the same time, some organic compounds in the air containing the VOCs are degraded into small molecular compounds; the air treated by the ozone generation device enters a catalytic oxidation reaction device and is in contact with a catalyst in the presence of the free oxygen free radicals and the ozone, and then VOCs molecules are catalyzed oxidized and degraded to obtain once purified air; and then the once purified air enters a filter sterilization device to obtain secondary purified air, the filter sterilization device includes a photocatalytic filter assembly and an activated carbon fiber, and the photocatalytic filter assembly is loaded with active nanoparticles with sterilization properties. The air purification method and system and application can efficiently fully and deeply digested the VOCs at the temperature of -10-40 DEG C, and the purposes of deep degradation and purification of the air are completed.

Description

technical field [0001] The invention relates to a VOCs waste gas purification process, in particular to an air purification method for catalytic oxidation degradation of VOCs at room temperature, and its system and application, belonging to the technical field of air purification. Background technique [0002] VOCs (Volatile Organic Compounds, volatile organic compounds) refer to organic compounds whose saturated vapor pressure exceeds 133.32Pa at room temperature. Their boiling point is between 50°C and 250°C. Sexuality, carcinogenicity and special odor, will affect the skin and mucous membranes, and cause acute damage to the human body. [0003] At present, the social economy is developing rapidly, but the air quality is declining. It is generally believed that the concentration of VOCs in normal, non-industrial indoor environments is not enough to cause tumors and cancers in the human body. However, when the concentration of VOCs is 3.0-25mg / m 3 When the concentration o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/44
CPCB01D53/44B01D53/75B01D2251/104B01D2255/104B01D2255/20707B01D2255/802B01D2257/708B01D2258/06
Inventor 赵宏刘茂成高翔高立东
Owner QINGDAO CHUANGQI MAIWO ENVIRONMENTAL TECH CO LTD
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