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Influence of blast furnace top gas composition and dust on HCl removal with low temperature Ca-based dechlorination agent 被引量:3
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作者 TENG Ai-jun HU Bin-sheng +1 位作者 GUI Yong-liang XUE Xiang-xin 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第8期1920-1927,共8页
Using fixed-bed reaction method and changing the gas composition and dust content,the influence of blast furnace top gas composition and dust on HCl removal with low temperature Ca-based antichlor was studied.It was f... Using fixed-bed reaction method and changing the gas composition and dust content,the influence of blast furnace top gas composition and dust on HCl removal with low temperature Ca-based antichlor was studied.It was found that,when the content of CO2 in blast furnace top gas increased,the dechlorination efficiency was getting worse obviously;when the contents of CO and N2 increased,the dechlorination efficiency was getting better to a certain extent;when the content of H2 changed,the dechlorination efficiency got no significant change;as the content of dust increased,the dechlorination efficiency got better obviously when the content was less than 15 g/m3,but it would be got worse quickly when the content was more than 20 g/m3,and the best content was 15–20 g/m3;the suitable site of the process of dechlorination was after gravity dust collector and before bag dust collector. 展开更多
关键词 blast furnace top gas hcl gas DECHLORINATION breakthrough time penetration chlorine capacity
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Laboratory study on high-temperature adsorption of HCI by dry-injection of Ca(OH)2 in a dual-layer granular bed filter
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作者 Junjun TAN Guohua YANG +1 位作者 Jingqiao MAO Huichao DAI 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2014年第6期863-870,共8页
Combustion-generated hydrogen chloride (HCl) is considered to be a very hazardous acid gaseous pollutant. This paper presents a laboratory study on the dry adsorption of HCl. The experiments were conducted in a dual... Combustion-generated hydrogen chloride (HCl) is considered to be a very hazardous acid gaseous pollutant. This paper presents a laboratory study on the dry adsorption of HCl. The experiments were conducted in a dual-layer granular bed filter, at gas temperatures of 500℃-700℃ and n(Ca)/n(Cl)molar ratios of 1.0-5.0 using the silver nitrate titration method by dry adsorbent powders Ca(OH)2. Mainly, the adsorption efficiency of HCI and utilization efficiency of Calcium were studied, by varying relevant factors including n(Ca)/n(Cl), tempera- ture, feeding method, water vapor and CO2. With a relatively higher HCl concentration of 1000ppm, the experimental results revealed that 600℃ may be the optimum temperature for HCl adsorption when optimum n (Ca)/n(Cl) was 2.5 in our tests. The results also demonstrated that the feeding at a constant pressure was more effective, and the HCl adsorption efficiency could rapidly reach over 90% with n(Ca)/n(Cl) = 2.5 at 600℃. Furthermore, the HCl adsorption efficiency was found to be slightly promoted by water vapor, while could be impeded by CO2, and the utilization efficiency of calcium could be up to 74.4% without CO2, while was only 36.8% with CO2 when n(Ca)/n(Cl) was 2.5 at 600℃. 展开更多
关键词 acid gas hcl Ca(OH)2 dry adsorption high temperature dual-layer granular bed filter
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