Today we first introduce to us new desulfurization technologies. These technologies are presented along with the development of various new technologies. For desulfurization technologies, they are new developments and advances.
　　1. New technology of desulfurization
　　1. Plasma technology
　　Plasma chemistry, which was formed in the 1960s, is an interdisciplinary subject. It is a technical method that combines high-energy physics, discharge physics, discharge chemistry, reaction engineering, and high-voltage pulse. The concept of treating waste gas is to directly transfer energy to gas molecules through an electric field, forming many photons, electrons, ions, free radicals and active atoms, excited state atoms, excited state molecules and active molecule fragments, etc. The chemical reactions that occur under extremely harsh conditions can proceed at near room temperature. The primary benefits of using the plasma method to treat exhaust gas are: short treatment process, high efficiency, low energy consumption and wide application range.
　　2. Catalytic oxidation desulfurization technology
　　Catalytic oxidation desulfurization technology is a new desulfurization technology based on industrial catalysis. The use of vanadium-based catalysts to catalyze and oxidize high-concentration SO2 flue gas to produce sulfuric acid in sulfuric acid is a very sophisticated process. Now we introduce the catalytic oxidation technology of low concentration SO2 flue gas.
　　Activated carbon catalytic oxidation of SO2 is a technology developed based on its outstanding physical adsorption and chemical adsorption. The messy pore structure can adsorb and fix the SO2 in the flue gas through physical action, and the surface oxide on the microcrystalline carbon can oxidize the adsorbed SO2 into sulfuric acid under the environment of water and oxygen.
　　3. Catalytic recovery desulfurization technology
　　The sulfur in SO2 is in an intermediate valence state, so it can not only react with oxidant to produce sulfuric acid, but also react with rejuvenating agent to produce elemental sulfur or hydrogen sulfide. Catalytic recovery desulfurization is the use of a recovery agent to directly recover SO2 in the flue gas to elemental sulfur under the action of a catalyst. C0, H2, CH4, and C are the primary recovery agents in the catalytic recovery process.
　　According to the different recovery agent, catalytic recovery desulfurization technology can be divided into: H2 recovery method, CO recovery method, C recovery method and so on.
　　4. Electrochemical desulfurization technology
　　Electrochemical desulfurization technology relies on the strong oxidation of l2 / Br2 to oxidize and absorb SO2 in the flue gas to generate sulfuric acid, and finally generate relatively pure concentrated sulfuric acid by heating the flue gas. The HBr or HI formed after the reaction is regenerated by electrolysis to produce 12 or Br2 to participate in the flue gas desulfurization reaction.
　　As a new, non-polluting green recycling technology, the primary benefits of electrochemical desulfurization technology are: 1) To avoid the disadvantages of many impure calcium sulfate / calcium sulfite or equivalent acid wastewater in the traditional wet desulfurization process; 2 ) The selected oxidative restoration agent is not easy to throw away; 3) Electrochemical desulfurization technology can obtain high-purity sulfuric acid, so that the sulfur element can be recovered and used, which meets the requirements of circular economy; 4) Flue gas has a high electrochemical desulfurization electrolysis efficiency (> 90 %), The process is simple, the desulfurization rate is high (~ 99%), and the operability is strong.
　　2. Conclusion and Prospect
　　With the improvement of public awareness of environmental protection and the increasing national environmental protection efforts, industrial production will continue to move toward green production and comprehensive use of resources. The sulfur-containing tail gas discharged in industrial production is also a resource that can be used. The technology that can complete the comprehensive use of sulfur-containing tail gas is a direction for the future development of flue gas desulfurization technology. [The above content is compiled and released for you by exhaust gas desulfurization equipment]