Treatment system for fluorine-containing nitric acid waste liquid

• Main Authors: LIU XIAOYU, LIU WEI, ZHU LINGHUI, LI ZHANGCHENG
• Format: Patent
• Language: Chinese; English
• Published: 23.03.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a treatment system for fluorine-containing nitric acid waste liquid. The treatment system is low in investment cost, simple and convenient to operate and capable of effectivelyimproving a recycling rate. The treatment system comprises a stripping tower, a preheater, a condenser, a vacuum buffer tank and a washing tower, wherein a packing column is arranged at the upper partof the stripping tower; packing of the packing column comprises first silica gel, silicon dioxide and second silica gel from bottom to top; an outlet of the packing column communicates with a tube pass of the preheater; an inlet of the stripping tower communicates with a shell pass of the preheater; a tube pass outlet of the preheater is connected with a shell-pass inlet of the condenser; a shell-pass first outlet of the condenser is connected with a first finished product tan; a shell-pass second outlet of the condenser is connected with an inlet of the vacuum buffer tank; an upper outlet ofthe vacuum buffer tank is