宝钢烧结烟气超低排放技术集成与实践

doi:10.13228/j.boyuan.issn0449-749x.20190298

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Abstract In order to meet the ultra-low emission standard of iron and steel industry,based on the source control and emission reduction technology,the sintering process of Baosteel adopts two co-purification processes,including four-electric field electrostatic precipitation and two-level activated carbon adsorption method,and four-electric field electrostatic precipitation and CFB desulfurization plus SCR denitrification method. The equipment,emission reduction effect and operation cost of the two processes are systematically analyzed. The results show that SO₂ emission concentration of both processes can lower than 20 mg/m³ (standard state), and can be potential to meet NO_x ultra-low emission limits lower than 50 mg/m³ (standard state),but it is difficult to reach the requirement that the emission limits of particulate matter lower than 10 mg/m³ (standard state). The by-product recovery rate of two-level activated carbon adsorption is high. While the synergistic purification process will produce a large amount of desulfurization ash,resulting in extra disposal. In terms of investment and comprehensive cost,the two-level activated carbon adsorption method is higher than the synergistic purification method,but if depreciation operation cost and direct cost are not considered,the result is just opposite. The energy consumption of the converted ton sinter of the synergistic purification method is significantly higher than that of the two-level activated carbon secondary adsorption method. Based on the analysis of environmental protection tax amount,the unit pollution equivalent removal and emission cost,producing and environmental protection facilities should be considered as a whole cooperate.

Key words： sintering flue gas purification two-level activated carbon adsorption method CFB and SCR synergistic purification method pollution equivalent

Received: 04 July 2019

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	ZHOU Mao-jun
	ZHANG Dai-hua

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ZHOU Mao-jun,ZHANG Dai-hua. Technology integration and practice of ultra-low emission of sintering flue gas in Baosteel[J]. Iron and Steel, 2020, 55(2): 144-151.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190298 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I2/144

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