硫转移剂对两段再生催化裂化装置热平衡的影响

Effect of Sulfur Transfer Agent on Thermal Balance of Two-stage Regeneration Catalytic Cracking Unit

应用硫转移剂是实现催化裂化烟气脱硫的理想方式。近年来,有关硫转移剂在催化裂化装置工业应用的报道层出不穷,但有关应用过程中对装置热平衡影响的研究较少。该文根据JF–SN1P硫转移剂在某公司2.8 Mt/a两段再生催化裂化装置的工业应用实际,量化分析了JF–SN1P硫转移剂对催化裂化装置热平衡的影响。结果表明,JF–SN1P剂有促进CO燃烧转化成CO_(2)的助燃作用,可使催化裂化贫氧再生段CO含量由6.8%降至3.5%,CO_(2)含量由13.2%升至16.4%;焦炭在贫氧段完全燃烧比例随之增加,贫氧段烧焦放热增加,总反应再生烧焦放热增加,占总烧焦放热比例增加9.98%;贫氧段再生烟气中可释放的CO燃烧热量减少,为使余热锅炉炉膛温度保持稳定,需提高瓦斯消耗量以达热平衡。

The application of sulfur transfer agents is an ideal way to achieve desulfurization of catalytic crackingflue gas.In recent years,there have been numerous reports on the industrial application of sulfur transfer agents in catalytic cracking units,but there is little research on the impact of application on the thermal balance of the unit.Based on the industrial application of JF-SN1P sulfur transfer agent in the 2.8 Mt/a two-stage regeneration catalytic cracking unit of a company,this article quantitatively analyzes the impact of JF-SN1P sulfur transfer agent on the thermal balance of the catalytic cracking unit.The results show that JF-SN1P agent has a combustion promoting effect on the conversion of CO into CO_(2),which can reduce the CO content in the lean oxygen regeneration section of catalytic cracking from 6.8%to 3.5%,and increase the CO_(2) content from 13.2%to 16.4%.The proportion of complete combustion of coke increases,the heat release of coke in the lean oxygen section increases,and the heat release of total reaction regeneration coke increases,increase of 9.98%in the proportion of total coking heat release.The CO combustion heat that can be released in the regenerationflue gas of the lean oxygen section is reduced.In order to maintain stable furnace temperature of the waste heat boiler,it is necessary to increase gas consumption to achieve heat balance.