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The working principle of different kinds of oil fume purifiers:
1. Catalyst combustion method
The principle of combustion purification method is to use the heat generated by high temperature combustion to carry out oxidation reaction, and convert the pollutants in the exhaust gas of oil fume into such substances as CO2 and H2O, so as to achieve the purpose of purification. In the combustion process, the fume exhaust gas is allowed to pass through the self-purification catalyst, and the catalytic reaction of the catalyst is conducive to the conversion of pollutants. In general, ceramic or metal honeycomb carriers are used for oxidation catalysis. This kind of fume purification equipment is only suitable for low fume concentration occasions, such as raw food or semi-finished products.
2. Activated Carbon Adsorption Method
Adsorption of pollutant particles in soot by granular activated carbon or activated carbon fiber felt. The characteristics of this equipment are similar to those of filtration and purification equipment, but the effect of removing odor molecules from oil fume is better.
3. Electrostatic treatment
Under the action of applied high voltage, electrons emitted from the wire surface or near the negative electrode move rapidly to the positive electrode, collide with gas molecules and ionize. When the fume exhaust gas passes through the high voltage electric field, the particles of the fume are charged by colliding and capturing gas ions in a very short time, and move towards the positive dust collector plate under the action of electric field force, thus achieving the separation effect. This kind of equipment has the advantages of less investment, less land occupation, no secondary pollution and low operation cost. Because it is easy to capture the dust with smaller particle size, the purification efficiency is high, up to 85-95%. The difference between its purification mechanism and gas method is that the separation force is electrostatic force, which acts directly on particles rather than on airflow, so it has the characteristics of low energy consumption and low resistance.