At present, the production of essence and fragrance in China is very large. Because essence and spice are widely used, such as food additives and snack spices. Due to the fact that spice waste gas generally contains organic industrial waste gases such as esters, ethers, aldehydes, etc., the emission of waste gas is not characterized by continuous emissions. So what kind of exhaust gas purifier can be used to discharge exhaust gas in an orderly manner, with stable exhaust gas treatment equipment, harmless residue after treatment, and simple equipment management.
As the gas flow rate increases, the efficiency of odor gas treatment shows a decreasing trend. When the flue gas flow rate is 400m3 ∏ h, its treatment efficiency is reduced by about 16% compared to when the flue gas flow rate is 300m3 ∏ h. Since the concentration of organic matter in the flue gas cannot be changed, an increase in flow rate means an increase in flow velocity. When the equipment power is constant, the size of the flow velocity reflects the length of time the airflow stays in the plasma equipment. The higher the flow rate, the shorter the residence time of the airflow in the plasma equipment, and the shorter the residence time of VOCs molecules in the reactor with the airflow. This reduces the probability of collision with free electrons, resulting in a corresponding decrease in the probability of VOCs molecule dissociation and ionization, and a decrease in processing efficiency.
Low temperature plasma technology is better, with reaction conditions at room temperature and pressure, simple reactor structure, and the ability to simultaneously eliminate mixed pollutants (some cases also have synergistic effects), without generating secondary pollution, etc. In terms of economic feasibility, the low-temperature plasma reaction device itself has a single and compact system composition. In terms of operating costs, microscopically speaking, the discharge process only increases the electron temperature while the ion temperature remains basically unchanged, so the reaction system can maintain low temperature. Therefore, not only is the energy utilization rate high, but the equipment maintenance cost is also very low.
Plasma chemical reaction process. The principle process of low-temperature plasma technology for treating pollutants is that under the action of an external electric field, a large number of energy carrying electrons generated by dielectric discharge bombard pollutant molecules, causing them to ionize, dissociate, and excite. Then, a series of complex physical and chemical reactions are triggered, transforming complex large molecule pollutants into simple small molecule safe substances, or transforming toxic and harmful substances into non-toxic, harmless, or low toxicity substances, thereby degrading and removing pollutants.
The exhaust gas purifier has energy-saving features: low energy consumption for low-temperature plasma treatment of flue gas, simple process: low-temperature plasma equipment, simple operation, and convenience No need for dedicated supervision, long service life of equipment: The equipment is composed of stainless steel, quartz, molybdenum and other materials.