Mechanical filtration
Generally, particles are captured by the following four ways: direct interception, inertial collision, Brownian diffusion mechanism, screening effect, which has a good effect on the collection of fine particles but a large wind resistance. In order to obtain a high purification efficiency, the resistance of the filter screen is large, and the filter screen needs to be dense, leading to a reduction of life, which needs to be replaced regularly.
High voltage electrostatic dust collection
The dust collection method which uses high-voltage electrostatic field to ionize the gas so that the dust particles can be charged and adsorbed on the electrode has small wind resistance but poor collection effect on the larger particles and fibers, which will cause discharge, time-consuming cleaning trouble, easy to generate ozone and secondary pollution.