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High-efficiency, low-energy-consumption and free-of-secondary-pollution method and device using low-temperature plasma to synergistically catalytically purify indoor volatile organic compounds

A low-temperature plasma and volatile organic compound technology, applied in the field of indoor air purification, can solve the problems of high energy consumption and large air resistance, and achieve the effects of low energy consumption, high conversion efficiency, and avoiding secondary pollution

Active Publication Date: 2017-12-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims at the problems of high energy consumption, ozone release, large air resistance and the like in the prior art when the through-type low-temperature plasma cooperates to catalyze and purify volatile organic compounds, and provides a low-temperature plasma with high efficiency, low energy consumption and no secondary pollution Method and device for synergistic catalytic purification of indoor volatile organic compounds

Method used

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  • High-efficiency, low-energy-consumption and free-of-secondary-pollution method and device using low-temperature plasma to synergistically catalytically purify indoor volatile organic compounds
  • High-efficiency, low-energy-consumption and free-of-secondary-pollution method and device using low-temperature plasma to synergistically catalytically purify indoor volatile organic compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The air purifier in an office has a rectangular air duct with a size of 320mm×250mm, and the low-temperature plasma generator 3, fan 4 and stop valve 5 are bypassed, and a circular plexiglass tube or stainless steel tube with an inner diameter of 50mm is used. connect. The low-temperature plasma generator 3 is designed in a string-column shape, and 8 cylinders are connected in parallel. The string wire is the discharge electrode, the cylinder is the ground electrode, and 8kV negative polarity DC high voltage power is applied between them. The serial wire discharge electrode is a stainless steel rod with an inner diameter of 3mm and several discharge gears connected in series at equal intervals. Each gear is evenly distributed with 4 discharge tips, and the distance between the discharge gears is 10mm; the ground electrode is a cylindrical stainless steel tube with an inner diameter of 22mm. The thickness is 1mm, and the length of the steel pipe is 300mm. 1%Ag~5%Mn / γ-A...

b example 2

[0039] The size of the air cleaner in the office is a rectangular air duct of 250mm × 250mm, which is bypassed to connect the low-temperature plasma generator 3, fan 4 and shut-off valve 5, and is connected with a circular plexiglass tube or stainless steel tube with an inner diameter of 50mm. The low-temperature plasma generator 3 is designed as a pin-hole plate type, with a plurality of needle-like conductors attached to the metal plate as discharge electrodes, a stainless steel plate with holes as a ground electrode, and holes are drilled in the plexiglass tube to connect conductive terminals for Connect the positive and negative poles of the high-voltage power supply, and apply a 6kV positive polarity DC high-voltage power supply between them. The needle tip radius is 0.5mm, the needle needle spacing is 5mm, and the needle plate spacing is 5mm. Prepare the 3%Ce~5%Mn / ZSM-5 adsorption / catalysis dual-function purification material into a 230mm×200mm×50mm honeycomb rectangular...

Embodiment 3

[0041]The air purifier in a student’s classroom is connected to the low-temperature plasma generator 3, fan 4 and stop valve 5 by way of a rectangular air duct with a size of 320mm×200mm, and a circular plexiglass tube or stainless steel tube with an inner diameter of 50mm is used. connect. The low-temperature plasma generator 3 is designed as a wire-plate type, with a plexiglass rectangular tube as the reactor shell, multiple nickel-chromium alloy wires with a diameter of 0.5mm as the discharge electrodes, and a stainless steel plate as the ground electrode. Drill holes to connect the conductive terminals to connect the positive and negative poles of the high-voltage power supply, and apply 8kV negative polarity DC high-voltage power supply between them. Prepare the 1%Ag~3%Mn / ZSM-5 adsorption / catalysis dual-function purification material into a 290mm×170mm×50mm honeycomb rectangular component 2 and install it in the air purifier, and the air volume during normal adsorption is...

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Abstract

The invention discloses a high-efficiency, low-energy-consumption and free-of-secondary-pollution method and device using low-temperature plasma to synergistically catalytically purify indoor volatile organic compounds and belongs to the technical field of indoor air purification. The method is characterized in that an adsorption / catalytic dual-function purification material component located in a main air pipe is utilized to efficiently adsorb and separate the volatile organic compounds in indoor air at normal air speed for a long time in a period when a building starts ventilation and purification; in a period when the building does not start the ventilation and purification, the low-temperature plasma passes the adsorption / catalytic dual-function purification material component in a short time in a circulating manner under a low air speed condition to allow adsorption-state organic matter to be completely oxidized into harmless or low-harm substances; after a low-temperature plasma generator is turned off, circulating gas containing ozone passes the adsorption / catalytic dual-function purification material component in a circulating manner to allow the ozone to be decomposed thoroughly. The method is high in indoor volatile organic matter conversion rate, low in energy consumption and capable of preventing secondary pollutants from being released into the indoor air.

Description

technical field [0001] The invention relates to the technical field of indoor air purification, in particular to a method and device for co-catalyzing and purifying indoor volatile organic compounds with low-temperature plasma with high efficiency, low energy consumption and no secondary pollution. Background technique [0002] The presence of low concentrations of volatile organic compounds (VOCs for short) indoors is one of the main factors that deteriorate indoor air quality. Volatile organic compounds are extremely harmful to the human body and the environment. Most volatile organic compounds not only stimulate the human respiratory tract, eyes, and nose, but also cause varying degrees of damage to the nervous system, hematopoietic system, liver, and kidneys. Indoor air volatile organic compounds can be purified by room temperature adsorption and other methods that can decompose organic compounds at room temperature. Adsorption at room temperature is currently the most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32B01D53/90B01D53/44B01D53/04
CPCB01D53/04B01D53/323B01D53/8687B01D53/90B01D2251/104B01D2253/104B01D2253/108B01D2255/104B01D2255/2065B01D2255/2073B01D2255/504B01D2257/708B01D2258/06B01D2259/818Y02A50/20
Inventor 朱天乐邵明攀孙也秦国彤
Owner BEIHANG UNIV
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