Method and system for recovering low-boiling-point solvent

Abstract

The invention relates to the technical field of recovery of a low-boiling-point solvent and discloses a system for recovering the low-boiling-point solvent. The system comprises a raw material tank, wherein an output port in the top of the raw material tank is fixedly communicated with a condenser I through a pipeline, and an output port in the right side of the condenser I is fixedly connected with a gas-liquid separator I through a pipeline. According to a method and the system for recovering the low-boiling-point solvent, reverse osmosis membrane assemblies are added on the original basis,the group of reverse osmosis membrane assemblies on the left side comprises six reverse osmosis membrane assemblies, the group of reverse osmosis membrane assemblies on the right side comprises five reverse osmosis membrane assemblies, a control valve is fixedly communicated between every two adjacent reverse osmosis membranes, so that when the uncondensed steam solvent passes through the reverseosmosis membrane assemblies, the steam solvent performs circular shuttle in the reverse osmosis membrane assemblies by controlling the control valve located between every two adjacent reverse osmosismembranes, finally, by means of layer-upon-layer absorption and filtration of the steam solvent, harmful particles in the steam solvent are effectively reduced, and the treatment efficiency of the steam solvent is increased.

Description

technical field [0001] The invention relates to the technical field of low boiling point solvent recovery, in particular to a low boiling point solvent recovery method and recovery system. Background technique [0002] Solvent is a kind of liquid that can dissolve gas, solid and liquid to form a uniform mixture. Solvent is also called flux. Water is the most widely used solvent. Alcohol, gasoline and benzene are commonly used organic solvents. They are used in plastics, paints, etc. In industrial production such as artificial leather and rubber, organic solvents are often used. [0003] The main characteristics of the pharmaceutical and chemical industry, especially the production of raw materials, are that the production process is highly dangerous, highly polluting and highly toxic. Almost all the production of raw materials uses a large amount of organic solvents, which are flammable, explosive, and volatile. , Toxic and harmful characteristics; in the production process...

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Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides a low boiling point solvent recovery method and recovery system, which has the advantages of recycling solvent and high recovery rate of solvent, and solves the problem that the above method is not suitable for low boiling point solvent, except for condenser In addition to recovering part of the solvent, other non-condensed solvents are discharged with the tail gas, which will cause environmental pollution, and there is also the problem of low treatment efficiency

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