Research and development on typical air pollutant control technology in coking industry
Since the 18th National Congress of the Communist Party of China,the state has incorporated the preven-tion and control of air pollution into the overall social and economic development.The coking industry has become another industry that will implement ultra-low emissions after the thermal power and steel industries.China is the world's coke production,consumption and supply center,in 2023,China's coke production of 490 million tons,accounting for 70％of the world's total output.The implementation of ultra-low emission transformation in the cok-ing industry is a systematic project,and it is necessary to coordinate the whole process to improve the air pollution control technology of enterprises.The implementation process of ultra-low emission transformation should realize the coordinated control of multiple pollutants,and promote the"double reduction"of pollutant emission intensity and carbon emission intensity.There are prominent problems in China's coking industry,such as a wide variety of poll-tats,large emissions,and high ultra-low emission costs.The key technologies of typical air pollution control for reducing pollutant and carbon in the coking industry are reviewed.The pollutant source control technology repre-sented by coke oven wall channeling control technology and waste gas reallocation technology can achieve significant reduction of SO2 and NOx,and the pollutant source reduction can relieve the pressure of flue gas end treatment.The difficulty of multi-pollutant collaborative treatment of coke oven flue gas is NOx removal.Multi-pollutant control technology of activated carbon method and low-temperature SCR denitrification technology coupled with SDA desul-phurization can achieve step-by-step removal of sulfur and nitrogen,which can achieve high denitrification efficiency and low-cost recovery of sulfur.Facing the national"carbon neutrality"and"carbon peaking"goal and the major demand of hydrogen metallurgy,coke oven gas uses CH4 to transform into H2 and CO through reforming reaction to achieve high value utilization and preparation of hydrogen-rich reduction gas to provide technical support for hydrogen-rich metallurgy,and realize the resource of greenhouse gases.The promotion and implementation of collab-orative pollution reduction and carbon reduction air pollution control technology in the coking industry will be condu-cive to the green and high-quality development of the coking industry.
cokingpollutantcarbon emissionsource reductionend-of-pipe treatmenthigh value utilization
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