Electrostatic precipitation technology and photocatalysis technology-based air purification device

Abstract

The invention relates to the technical field of air purification, and particularly relates to an electrostatic precipitation technology and photocatalysis technology-based air purification device. The air purification device comprises an earthing dust collection electrode, a photocatalysis electrode and a corona electrode applied with similar voltage, and the value of voltage applied on the photocatalysis electrode is less than or equal to that of the voltage applied on the corona electrode. By applying the similar type of voltage on the photocatalysis electrode and the corona electrode and leading the voltage value of the photocatalysis electrode to be less than that of the corona electrode, the charged particulate pollutant can be guaranteed not to be precipitated on the surface of the photocatalysis electrode due to repulsive force of the photocatalysis electrode, so that the problem that a photocatalyst is easily failed due to pollution of particulate can be avoided, and the problems that the traditional purification device needs the installation of a plurality of high-density filtering membranes before photocatalysis process to easily cause large wind resistance, high cost, poor purification effect of the device and the like can also be avoided.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to an air purification device based on electrostatic dust removal technology and photocatalysis technology. Background technique [0002] With the gradual deterioration of air quality, how to ensure that people can live in an environment with good air quality has become a technical issue that people generally care about; favor. [0003] As we all know, there are two main types of pollutants in the air: one is particulate pollutants with a certain particle size such as PM10, PM2.5, pollen, dust, dust, etc.; the other is formaldehyde emitted from decoration materials. , some gaseous inorganic oxides or volatile organic compounds (ie: VOCs) and other gaseous pollutants that exist in molecular size; among them, the method adopted for gaseous pollutants is mainly to use photocatalytic technology to oxidize and degrade them. The main way to deal with particulate pollution is to...

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Problems solved by technology

[0004] Because it is difficult to obtain a sufficiently high single purification efficiency whether it is simply using photocatalytic technology or purely using electrostatic precipitating technology; therefore, in existing air purification devices, photocatalytic technology and electrostatic precipitating technology are generally combined. Combined use, that is: set up two sets of purification components in the device to completely solve the particle pollutants before the purification link of photocatalytic treatment

However, due to the difference in the charge of particulate matter due to its own physical properties, the force it receives in the electric field is also different, resulting in the inability of some particulate pollutants to be effectively collected and deposited; at the same time, due to the current The particle purification components of the system have disadvantages such as large wind resistance and frequent replacement of filter screens, and cannot effectively collect particle pollutants; based on this, the surface of the photocatalytic component in the device is easily covered by particle pollutants, and the This part of particle pollutants will pollute the photocatalyst attached to the surface of the photocatalytic component, resulting in the failure of the photocatalyst, and will eventually affect the photocatalytic effect of the photocatalytic component on gaseous pollutants and the air purification efficiency and efficiency of the air purification device itself. Purification effect

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