Purification method of Dongguan purification project
1. Dongguan purification project-physical purification method
① Adsorption filter-activated carbon. Activated carbon is a porous carbonaceous material. It has a highly developed pore structure. The porous structure of activated carbon provides it with a large amount of surface area, which can be fully contacted with gas (impurities), thereby giving the unique adsorption properties of activated carbon. Make it very easy to achieve the purpose of absorbing and collecting impurities. Just like magnetic force, all molecules have mutual attraction. Disadvantages: ordinary activated carbon cannot adsorb all toxic gases, and has low efficiency and easy desorption.
②Mechanical filtration—HEPA net. HEPA (High efficiency particulate air Filter), which means high-efficiency air filter, a filter that meets the HEPA standard, has an efficiency of 99.998% for 0.3 microns. The characteristic of the HEPA net is that air can pass through, but fine particles cannot pass through. . The HEPA filter consists of a stack of continuously folded back and forth sub-glass fiber membranes, forming a wavy gasket for placing and supporting the filtering boundary.
2. Dongguan purification project-electrostatic purification method
Working principle: Adopt high-voltage electrostatic adsorption dust removal working principle. Electrostatic type is the working principle of high-voltage electrostatic adsorption dust removal. Under the action of high-voltage static electricity, the cathode line in the electrostatic field generates a corona discharge, and a large number of negative ions are generated in the corona layer. The negative ions continuously move to the anode under the effect of the electrostatic field. When the dust in the air passes through the electric field, the dust is charged by the collision of negative ions, and the charged dust is also affected by the electrostatic field, moves toward the anode (dust collector), and releases the charge after reaching the anode. Disadvantages: It can remove flying dust (cannot remove toxic gas), its efficiency is lower and slower than mechanical type, and it is easy to produce ozone. This model has been rated as the worst purifier in the US market.