Process for treating tail gas containing insoluble solvent

Abstract

The invention discloses a process for treating tail gas containing insoluble solvent. The tail gas containing the water-insoluble organic solvent enters into a water ring vacuum pump through a tail gas buffer tank; the tail gas in the water ring vacuum pump is thoroughly mixed with working fluid of the water ring vacuum pump; a water-gas mixture is separated by a gas-fluid separation device on an outlet of the water ring vacuum pump; the fluid returns back to a system to be circularly used; the organic solvent in the gas, which is likely to escape, is further recycled by a glass condenser arranged on the tail part, and then the gas is completely exhausted after being filtered and adsorbed by an activated carbon filter; the working circulating fluid of the water ring vacuum pump is cooled to reduce the temperature by a cooler; and fluid in a fluid-recycling tank of the glass condenser and fluid in a circulating water basin of a circulating system are lifted into a phase splitting tank for phase splitting treatment, the separated organic solvent is sent to a rectification system to be rectified and purified, and aqueous phases return to the circulating water basin to be continuously and circularly used. The process not only can recycle the useful components of the tail gas to reduce environmental pollution, but can also reduce the consumption of the solvent to lower the production cost.

Description

Technical field: [0001] The invention relates to a process for treating tail gas containing insoluble solvent. Background technique: [0002] In the process of chemical production, tail gas containing organic solvents usually needs to be discharged. The general tail gas treatment method is mostly to use a scrubber for washing. Although this method is feasible, there are still certain defects: the use of a spray tower, the washing effect is not ideal ; If the packed tower is selected, the system resistance is large, which will have adverse effects on the process. Invention content: [0003] The object of the present invention is to provide a process for treating tail gas containing insoluble solvents, which can not only recover its useful components, but also reduce environmental pollution, reduce solvent consumption, and reduce production costs. [0004] Technical solution of the present invention is: [0005] A process for treating tail gas containing insoluble solvents...

AI Technical Summary

Problems solved by technology

[0002] In the process of chemical production, tail gas containing organic solvents usually needs to be discharged. The general tail gas treatment method is mostly to use a scrubber for washing. Although this method is feasible, there are still certain defects: the use of a spray tower, the washing effect is not ideal ; If the packed tower is selected, the system resistance is large, which will have adverse effects on the process, etc.

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