钛白工程设计中过滤与分离设备选型及优化

在硫酸法钛白生产过程中涉及到多个化学单元操作过程，其中过滤分离是一个重要的单元操作过程，其生产工序包括热过滤、硫酸亚铁分离、一次水洗、二次水洗、盐处理后的浆料脱水、三次水洗等，所用设备包括管式过滤机、压滤机、叶滤机、真空转鼓过滤机、离心机等。对各工序在设备选型、工程造价、建筑面积、运行成本以及分离效果等方面作出技术经济分析，以期能对钛白企业在过滤分离工序选择合理的工艺路线和设备有所帮助，以提高企业节能降耗的水平。

Selection and optimization of filtration-and-separation equipment in titanium dioxide engineering design

There are several chemical unit operation processes in titanium dioxide production with sulfuric acid method.The filtration-and-separation is an important unit operation process.Its production process includes hot filtration，ferrous sulfate separation，once washing，twice washing，salt slurry dehydration after treatment，and three-times washing etc..The devices comprise the tube type filter，pressure filter，leaf filter，vacuum drum filter，and centrifuge etc..Technical and economic analysis was made for each working procedure in the aspects of equipment selection，construction cost，construction area，operation cost，and separation effect etc.，so as to help the enterprises making a reasonable choice for process route and equipment in the filtration and separation process，to improve the energy-saving and cost-reducing level.