Production line for recycling fluorine-containing tail gas of lithium hexafluorophosphate

• Main Authors: CAI LISHA, ZOU YANMING, ZHAO JINNIU, WU DI, HU DAN, KONG XIANGQIN
• Format: Patent
• Language: Chinese; English
• Published: 29.09.2023
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the technical field of chemical tail gas treatment, and particularly discloses a lithium hexafluorophosphate fluorine-containing tail gas recycling production line which comprises a tail gas treatment unit and a wastewater treatment unit, the tail gas treatment unit adopts a two-stage ammonia water washing and one-stage water washing mode for treatment, washing liquid is recycled, and the use amount of the washing liquid is saved; washing circulating liquid generated in the tail gas treatment unit is treated by the wastewater treatment unit, the wastewater treatment unit adopts an MVR evaporation system to treat wastewater, and hot steam and distilled water generated in the MVR evaporation system are recycled, so that the quantity of resources used for wastewater treatment is reduced. 本申请涉及化工尾气处理技术领域，具体公开了一种六氟磷酸锂含氟尾气回收利用的生产线，其包括尾气处理单元和废水处理单元，尾气处理单元采用"两级氨水洗涤+一级水洗"方式处理，洗涤液循环使用，节省洗涤液使用量；尾气处理单元中产生的洗涤循环液采用废水处理单元处理，废水处理单元采用MVR蒸发系统处理废水，MVR蒸发系统中产生的热蒸汽和蒸馏水循环使用，节省废水处理使用资源量。