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The new No. 1 and No. 2 coke ovens of XX Steel Company were put into operation in 2005. They were equipped with a 150,000-ton coal yard, a 500t/h coal blending and conveying system, a 2×55-hole 6m coke oven, a 130,000 m3/h gas purification system, a 150,000 t/a tar distillation unit, and a 300t/h debenzene removal process. according to * * The latest standards have implemented dry quenching, coal loading-coking ground dust removal station, coal preparation transportation belt fully sealed, coal preparation crushing, screening coke dust removal, wet coke quenching dust removal, coking wastewater 150m3/h A/O method to degrade ammonia nitrogen and COD, and reserved the gas desulfurization vacuum carbonate process, and environmental protection investment accounts for more than 1/3 of the total investment. The above projects have been put into production normally, and all environmental protection indicators have been met. * * First level standard. Compared with the second phase of the project, the emission of pollutants has been significantly reduced. 1 The effect of using environmental protection technology in the chemical production system of the new coke ovens No. 1 and 2 1.1 Environmental protection project of the new coke ovens No. 1 and No. 2 XX Steel Company New 1. The No. 2 coke oven has simultaneously built a coal preparation crusher bag dust collector, a coal loading and coke pushing ground dust removal station system, a coke screening ground dust removal station device, a coal coke transportation fully sealed system, and a 145t/h dry coke device. It uses a vacuum carbonate desulfurization process to purify coal gas, and controls toxic and harmful gases in separate systems. The wastewater is treated with A/O technology and HSB bacteria (the processing capacity is 150t/h), and coal humidity control is reserved. The coke screening and coke transportation in the first phase were simultaneously modified. Ground stations were used for coke pushing and dust removal in No. 5 and 6 coke ovens, and vehicle-mounted dust removal was used for coal loading dust removal. Environmental protection investment accounts for approximately 30% of the total project cost. This project strictly complies with the coking industry clean production standards (HJ/T126-2003), etc. * * Environmental protection standards are implemented. The waste residues of the coking enterprise include coal dust, tar residue (including tar tank cleaning residue), crude benzene regeneration residue and remaining sludge recovered from the dust collectors in the coal preparation, coke pushing, coal loading, coke quenching and coke screening sections, which are all completely processed and utilized in the plant. Biochemical wastewater will be recycled after it reaches the standard to achieve zero discharge of wastewater. 1.2 The effects of environmental protection equipment after they are put into operation The environmental protection projects that have been put into operation have fully met the design requirements. The pollution source flue gas monitoring data detected by the environmental monitoring station of XX Steel Company is shown in Table 1. As can be seen from Table 1, the pollutant concentration indicators such as smoke, SO2, NOx, and CO are all controlled within the implementation standards, and the compliance rate is 100%. The biochemical treatment facility is in the debugging stage and produces water COD part of the time.