In order to implement the relevant requirements of the " Opinions of the Central Committee of the Communist Party of China and the State Council on deepening the fight against pollution prevention and control " and the " 14th Five-Year " Comprehensive Work Plan for Energy Saving and Emission Reduction, " the Ministry of Ecology and Environment issued and implemented the " Opinions on Promoting the Implementation of Ultra-low Emissions in the Coking Industry, " which put forward higher requirements for the tail gas treatment of coking enterprises.  The organized, unorganized emission sources of the semi-coking enterprises and the exhaust gas treatment technology adopted in the design were introduced.