Electrochemical degradation-photocatalysis combined air purification method

Abstract

The invention discloses an air purification method that combines electrochemical degradation and photocatalytic technology. It mainly consists of a filter device, a flow electrolyzer composed of Ti / PbO2 as an anode and a stainless steel plate as a cathode, and photocatalysis based on zeolite-titanium dioxide photocatalyst. The reactor is composed of air containing pollutants and dust particles that first passes through a fiber filter, and then undergoes an electrocatalytic oxidation reaction at the anode of the flowing electrolyzer. After electrolysis, it enters the photocatalytic reactor for further degradation. Through the combination of three processes, the present invention improves the air filtration effect and improves the problem of low photocatalytic reaction rate. This method greatly improves the problem of poor efficiency of a single module and makes the air purification effect not less than 90%.

Description

technical field

[0001] The invention belongs to the field of air purification, and in particular relates to an air purification method combined with electrochemical degradation and photocatalytic technology. Background technique

[0002] With the improvement of people's material living standards, modern people spend about 80%-90% of their time indoors in a day, so the quality of the indoor environment directly affects our health. Unfortunately, air-conditioning systems and various decorative materials are widely and frequently used in buildings, making indoor air pollution worse. Indoor air pollution is becoming the third pollution period marked by "soot type" and "photochemical smog type". According to the survey of relevant international organizations, nearly 3 million people die directly or indirectly from decoration pollution every year in the world, and 30% of the world's newly built and rebuilt buildings have indoor air pollution gases harmful to health. At present, ...

Examples

Embodiment 1

[0032] Experimental selection: the filter device adopts two-layer filtration, the first-stage filtration adopts 20ppi fiber filter material, and the second-stage filtration adopts 5ppi fiber filter material; the flow type electrolyzer adopts Ti / PbO 2 The coated plate is the anode, the stainless steel plate is the cathode, the distance between the electrodes is 4mm, the electrode voltage is 10V, and the current density is 50mA / cm 2 , the electrolyte uses 0.1mol / L sodium sulfate; the photocatalytic reaction pool uses an ultraviolet lamp with a power of 18w and a wavelength of 253nm as the light source; the photocatalyst uses zeolite-titanium dioxide photocatalyst; The standard gas, the dilution gas uses standard purified air) mixed with 20mg of dust particles.

[0033] Reaction performance: The particle filtration rate of the filter device is 95%, and the synergistic effect of the electrolytic cell and photocatalysis improves the efficiency of photocatalytic oxidation of organic m...

technical field

[0001] The invention belongs to the field of air purification, and in particular relates to an air purification method combined with electrochemical degradation and photocatalytic technology. Background technique

[0002] With the improvement of people's material living standards, modern people spend about 80%-90% of their time indoors in a day, so the quality of the indoor environment directly affects our health. Unfortunately, air-conditioning systems and various decorative materials are widely and frequently used in buildings, making indoor air pollution worse. Indoor air pollution is becoming the third pollution period marked by "soot type" and "photochemical smog type". According to the survey of relevant international organizations, nearly 3 million people die directly or indirectly from decoration pollution every year in the world, and 30% of the world's newly built and rebuilt buildings have indoor air pollution gases harmful to health. At present, ...

Examples

Embodiment 1

[0032] Experimental selection: the filter device adopts two-layer filtration, the first-stage filtration adopts 20ppi fiber filter material, and the second-stage filtration adopts 5ppi fiber filter material; the flow type electrolyzer adopts Ti / PbO 2 The coated plate is the anode, the stainless steel plate is the cathode, the distance between the electrodes is 4mm, the electrode voltage is 10V, and the current density is 50mA / cm 2 , the electrolyte uses 0.1mol / L sodium sulfate; the photocatalytic reaction pool uses an ultraviolet lamp with a power of 18w and a wavelength of 253nm as the light source; the photocatalyst uses zeolite-titanium dioxide photocatalyst; The standard gas, the dilution gas uses standard purified air) mixed with 20mg of dust particles.

[0033] Reaction performance: The particle filtration rate of the filter device is 95%, and the synergistic effect of the electrolytic cell and photocatalysis improves the efficiency of photocatalytic oxidation of organic m...