Low temperature plasma equipment

Low temperature plasma equipment

The complete equipment and technology for low-temperature plasma industrial waste gas treatment, as a new type of gaseous pollutant treatment technology, is an interdisciplinary and comprehensive electronic chemistry technology that integrates physics, chemistry, biology, and environmental science. Due to its ability to efficiently decompose pollutant molecules and low treatment energy consumption, it is currently one of the most effective technical methods for air pollution control at home and abroad. Its application and promotion prospects are broad, opening up a new way of thinking for the treatment of VOC organic waste gas and odorous gases in the industrial field.

Low temperature plasma is the fourth state of matter after solid, liquid, and gas. When the applied voltage reaches the ignition voltage of the gas, the gas is broken down, producing a mixture of electrons, various ions, atoms, and free radicals. During the discharge process, although the electron temperature is high, the temperature of heavy particles is low, and the entire system exhibits a low-temperature state, hence it is called low-temperature plasma.

Low temperature plasma degradation of pollutants utilizes the interaction between high-energy electrons, free radicals, and other active particles with pollutants in exhaust gas, causing pollutant molecules to decompose in a very short period of time and undergo various subsequent reactions to achieve the goal of decomposing pollutants.

The application of DDBD low-temperature plasma technology in the treatment of odorous gases has the advantages of good treatment effect, low operating cost, no secondary pollution, stable operation, easy operation and management, and immediate use.

• 1.DDBD dielectric barrier discharge generates high electron energy and high low-temperature plasma density, reaching 1500 times that of commonly used plasma technology (corona discharge), and can interact with almost all odorous gas molecules;
• 2.DDBD technology has a fast reaction speed, with gas passing through the reaction zone at a speed of 3-15 meters per second, achieving good processing results. Other technologies have difficulty achieving the processing effect of DDBD with gas passing through the reaction zone at a speed of 0.01 meters per second;
• 3.The gas passage section is entirely made of corrosion-resistant materials such as ceramics, quartz, stainless steel, etc. The electrodes do not come into direct contact with the exhaust gas, fundamentally solving the corrosion problem of low-temperature plasma technology equipment; Other technologies involve direct contact between gas and electrodes, which can cause severe corrosion within 3 months or 1 year. Even if the gas passing through is not corrosive, the generated ozone can corrode the electrodes;
• 4.The DDBD host is a complete industrial waste gas treatment device, equipped with a DDBD dedicated tower in front, which can effectively remove dust and moisture from the waste gas, and is easy to operate;
• 5.The automation level is high, and the equipment starts and stops very quickly. It can be turned on as needed. For some chemical production discontinuities, it can be turned on during production and stopped during non production intervals, saving a lot of energy;
• 6.The operating cost is relatively low, saving 5-8 times the operating cost compared to commonly used regenerative combustion furnaces RTO. The operating cost per cubic meter of gas is only 0.3-0.9 cents, and some high concentration exhaust gases can be diluted with air and treated with DDBD technology;
• 7.Widely applicable, basically unaffected by temperature and pollutant components, it has a good decomposition effect on the odor concentration of foul odors. The removal rate of foul odors reaches 80-98%, and the concentration of treated gas odor meets national standards;
• 8.The DDBD technology for treating industrial waste gas is not a water washing technology, but rather a direct breakdown and bombardment of pollutants by high-energy plasma, causing molecular chain breakage rather than pollutant transfer;
• 9.Important feature: Taking non methane total hydrocarbons as an example, when detected by chromatography, the removal rate of non methane total hydrocarbons may only be 45%, but the removal rate of foul odors can reach 93%. This is because after processing, some molecules of non methane total hydrocarbons become small molecules, and when detected by chromatography, they still appear as non methane total hydrocarbons; The high removal rate of foul odors indicates that over 93% of the pollutants have actually been decomposed, as some of the decomposed substances also have odors;
• 10.DDBD technology is truly created in China, and European, American, and Asian countries are introducing Chinese technology to solve the problem of dioxin pollution. DDBD technology is already a mature process for the world's difficult problem of dioxin, because dioxin like substances contain chlorine, most of which are electrophilic groups, and are more easily bombarded by electrons.