Sintering flue gas purifying process and equipment by use of activated coke in Baosteel
WANG Qing-guo1,2,ZHU Tong3,LI Yong4
(1. Investment Management Department, Baoshan Iron and Steel Co., Ltd., Shanghai 201900, China 2. Engineering Headquarters, Baosteel Zhanjiang Iron and Steel Co., Ltd., Zhanjiang 524043, Guangdong, China 3. Iron Making Plant, Baosteel Zhanjiang Iron and Steel Co., Ltd., Zhanjiang 524043, Guangdong, China 4. Hunan Zhongye Changtian Energy Conservation and Environmental Protection Technology Co., Ltd.,Changsha 410007, Hunan, China)
Abstract:The removal mechanisms for main pollutants in sintering flue gas,process flow for flue gas purification and systematical equipment of the sintering flue gas purifying systems by activated coke were introduced in detail,which is the first self-designing and manufacturing purifying system of its kind in China. The major facilities including flue system,adsorption system,desorption system,activated coke storage and transportation system were systematically and completely illustrated. The inner structure,working principle and relevant designing and operating parameters of some major equipment were concisely presented. The technological characteristics of this purifying system were summarized through analyzing and the actual treatment effect was presented,which had the advantages of high reduction rate of pollutants and steady and reliable operating performance. SO2 content ranges from 412.091 to 642.811 mg/m3 before being purified,while its content is decreased between 1.227 and 7.999 mg/m3 after treatment,with a high removal rate from 98.53% to 99.76% on the basis of daily averages. [NOx]content ranges from 235.451 to 365.218 mg/m3 before being purified,while its content is decreased between 92.707 and 137.663 mg/m3 after treatment,with a removal rate from 57.63% to 69.44%. The toxic equivalent quantity of dioxin ranges from 0.82 to 5.40 ngTEQ/m3 before being purified,while its TEQ is decreased between 0.002 3 and 0.008 9 ngTEQ/m3 after treatment,with a high removal rate from 99.43% to 99.89%. The dust content after treatment is decreased between 7.747 and 11.500 mg/m3. An evaluating conclusion on this purifying system was drawn based on the actual treatment effect and practical run performance. Meanwhile,the application prospect of this new purifying system was predicted.
汪庆国,朱 彤,李 勇 . 宝钢烧结烟气活性炭净化工艺和装备[J]. , 2018, 53(3): 87-95.
WANG Qing-guo,,ZHU Tong,LI Yong. Sintering flue gas purifying process and equipment by use of activated coke in Baosteel. Iron and Steel, 2018, 53(3): 87-95.
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