【摘要】 高炉煤气脱硫对推进钢铁行业全流程超低排放具有重要意义。针对高炉煤气气量大、波动频繁、压力大、组分复杂的排放特征，提出了高炉煤气水解-吸附工艺，建设运行了中试系统，并评价了运行效果。结果表明，水解-吸附工艺COS水解转化率可达98.7%,H₂S脱除效率可达97.7%,净化后高炉煤气中COS含量小于1.5 mg/m³,H₂S含量小于3 mg/m³,指标满足国家及各地的超低排放要求；水解塔阻力小于3 kPa,吸附塔阻力小于1 kPa,随着时间的延长阻力没有明显的上升趋势，反应器可长期平稳运行；γ-Al₂O₃水解催化剂在反应后K相对含量下降了7.1%,S相对含量增加了9.3%,催化剂的碱性成分有所消耗且催化剂表面有硫或硫酸盐的沉积，但消耗量和沉积量都不大；比表面积下降了6.20%,孔容积下降了9.30%,说明反应后的硫沉积在一定程度上堵塞了孔道，而堆密度、抗压强度均未发生明显变化；γ-Fe₂O₃吸附剂在反应后Fe的相对含量下降了5.4%,S相对含量增加了13.2%,比表面积下降了15.02%,孔容积下降了11.76%,反应生成的硫化铁、硫化亚铁、硫单质使吸附剂的S含量明显增加且导致了吸附剂比表面积的减少和孔道的堵塞，反应后吸附剂的堆密度和抗压强度均变大。更多还原

【Abstract】 The desulfurization of blast furnace gas is of great significance for promoting the entire process of ultra-low emissions in the steel industry. In response to the emission characteristics of high gas volume, frequent fluctuations, high pressure, and complex components of blast furnace gas, a hydrolysis adsorption desulfurization process for blast furnace gas was proposed, and constructed and operated a pilot system, and evaluated the operating effect. The operational effectiveness of the pilot system was evaluated. The results show that the COS hydrolysis conversion rate and H₂S removal efficiency of the hydrolysis adsorption process can reach 98.7% and 97.7%, respectively. After purification, the COS content in blast furnace gas is less than 1.5 mg/m³ and the H2S content is less than 3 mg/m³, meeting the ultra-low emission requirements of the country and various regions; The resistance of the hydrolysis tower developed is less than 3 kPa, and the resistance of the adsorption tower is less than 1 kPa. With the extension of time, the resistance does not show a significant upward trend, and the reactor can operate smoothly for a long time; After the reaction, the K relative content of γ-Al₂O₃ hydrolysis catalyst decreased by 7.1%, and the S relative content increased by 9.3%. The alkaline component of the catalyst was consumed, and there were deposits of sulfur or sulfate on the catalyst surface, but the consumption and deposition were not significant. The specific surface area of the hydrolysis catalyst decreased by 6.20% and the pore volume decreased by 9.30%, indicating that the sulfur deposition after the reaction blocked the pores to a certain extent, but the bulk density and compressive strength of the hydrolysis catalyst the reaction did not show significant changes; After the reaction, the Fe relative content of γ-Fe₂O₃ adsorbent decreased by 5.4%, the S relative content increased by 13.2%, the specific surface area decreased by 15.02%, and the pore volume decreased by 11.76%. The generated iron sulfide, ferrous sulfide, and sulfur elemental substances significantly increased the S content of the adsorbent, leading to a decrease in the specific surface area of the adsorbent and blockage of the pores. After the reaction, the bulk density and compressive strength of the adsorbent increased.更多还原