FCC烟气SOx转移剂中试放大研究

以工业化生产为研究目标、富镁尖晶石为研究对象，使用工业级原材料，添加Ce/Fe/V等活性组元，采用压力式喷雾干燥装置，中试制备了几种符合工业应用的FCC烟气SOx转移剂，摸索出最佳喷雾干燥生产条件，即热空气进塔温度740～760 C，出塔温度345～360 C，雾化压力5.0～5.5MPa，料液温度80 C，料液固含量15％。对所得中试产品进行了实验室模拟工业装置脱硫性能评价。结果表明，中试放大的FCC烟气SOx转移剂能有效地降低再生烟气中SOx含量；水热老化使助剂的脱硫活性有所降低

SCALE UP OF PREPARING SOx TRANSFER ADDITIVES FOR REDUCING SOx EMISSION FROM FCC UNIT

SOx transfer additive samples containing magnesium rich spinel and active components (Ce/Fe/V) were prepared in pilot plant scale using a spray drying device with pressure nozzle. The preparation conditions, esp. spray drying conditions, were investigated. Test results showed that microspheric samples having similar particle size distributions as FCC catalyst could be obtained using slurry with a solid content of 15% and a temperature of 80℃, under the spray drying conditions of hot air inlet temperature of 740～760℃，outlet temperature of 345～360℃ and atomizing pressure in the range of 5.0～5.5 MPa. The SOx transfer performance of the obtained samples was evaluated by micro-reactor and FFB simulating commercial FCC unit conditions. Results showed that the prepared SOx transfer additive samples could effectively reduce the SOx content in flue gas；hydrothermal treatment could reduce the SOx transfer activity of additive in some way.