Device for recovering acetonitrile from wastewater by azeotropic distillation

• Main Authors: ZHANG WEI, XIE BAOHAN, BI ZUOBIN
• Format: Patent
• Language: Chinese; English
• Published: 14.12.2021
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The utility model belongs to the technical field of C4 separation industrial production, and particularly relates to a device for recovering acetonitrile from wastewater by utilizing azeotropic distillation. The device comprises a water collecting tank, a rectifying tower, a condenser and a return tank which are sequentially communicated through pipelines, an acetonitrile-containing water feeding pipe is arranged on the upper portion of the rectifying tower, and a feeding and discharging heat exchanger is installed between the acetonitrile-containing water feeding pipe and the rectifying tower. The device disclosed by the utility model can be used for recycling acetonitrile in wastewater, after water and acetonitrile are separated through azeotropic distillation, the acetonitrile is recycled, the water can be discharged when meeting the pollution discharge requirement, and meanwhile, the water can also be recycled. 本实用新型属于碳四分离工业化生产技术领域，具体涉及一种利用共沸精馏从废水中回收乙腈的装置。所述装置包括依次通过管路连通设置的水收集罐、精馏塔、冷凝器和回流罐，精馏塔的上部设置有含乙腈水进料管