Separation and recycle system for water-containing organic waste liquid and organic solvents as well as recycle method

Abstract

The invention provides a separation and recycle system for water-containing organic waste liquid and organic solvents as well as a recycle method, wherein the separation and recycle system consists ofa distillation system and a pervaporation membrane separation system through process pipeline connection. A packed tower is adopted as a rectifying tower, and the material inlet of the packed tower is arranged in the center of a packed tower liquid distributor. A damping structure is arranged in the pervaporation membrane unit of the pervaporation membrane separation system. The separation and recycle system provided by the invention is suitable for online dehydration and recycle of multiple kinds of water-containing and two or more than two azeotropic or non-azeotropic organic solvents as well as for separation and reuse of the organic solvents.

Description

technical field [0001] The invention belongs to the field of organic waste liquid recovery, and in particular relates to a miniaturized solvent recovery device and method. Background technique [0002] At present, with the rapid development of the global economy and the continuous improvement of the degree of integration, scientific research activities in various scientific fields in China have also entered the fast track of rapid development, and the number of units engaged in scientific research has also doubled, especially in the fields of chemistry and life sciences. Very quickly, it has put forward higher requirements for the basic raw material industry and environmental protection industry. The quality requirements of the solvents used in the research process are getting higher and higher, and the dosage is also increasing. There are many types of solvents, and the needs of each unit are relatively scattered. Collection and processing work is cumbersome. [0003] In t...

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Problems solved by technology

[0002] At present, with the rapid development of the global economy and the continuous improvement of the degree of integration, scientific research activities in various scientific fields in China have also entered the fast track of rapid development, and the number of units engaged in scientific research has also doubled, especially in the fields of chemistry and life sciences. Very quickly, it has put forward higher requirements for the basic raw material industry and environmental protection industry. The quality requirements of the solvents used in the research process are getting higher and higher, and the dosage is also increasing. There are many types of solvents, and the needs of each unit are relatively scattered. Collection and processing work is cumbersome

[0003] In the pharmaceutical industry, the preparative liquid chromatography system has become the mainstream technology for separating and purifying drugs due to its outstanding advantages such as wide applicability, simple operation, and high separation efficiency. If the waste solvent is discharged directly, it will not only cause environmental pollution but also cause high production costs; in addition, due to the high requirements for the solvent quality of the preparative chromatography system, it is impossible for the waste solvent to be reused through simple recycling.

[0004] Most of the existing solvent recovery systems are industrial devices with large processing capacity. This device has the characteristics of high policy threshold, long construction period, high investment cost, large floor area, and high requirements for system safety and operability. Most of the current solvent recovery devices are composed of simple evaporation and distillation processes, which only simply concentrate the organic solvent and then reuse it. When the impurities accumulate to a certain concentration, they still need to be discharged. In fact, it is only a reduction in solvent recovery. the role of

Therefore, most devices can only be regarded as organic solvent concentrators, and the recovered organic solvents cannot be used directly

Especially for enterprises using preparative chromatography, the purity requirements for organic solvents are relatively high, and organic solvents recovered from existing equipment cannot be directly used for preparative chromatography

At present, there is no equipment that can repurify the recovered solvent to the reuse standard, and there are a large number of pharmaceutical companies and large and medium-sized pharmaceutical research institutions that use preparative chromatography. The required miniaturized device is used, and the device occupies a small area and is easy to operate, which is of great significance for the long-term survival of the enterprise, reducing the impact on the environment, and reducing production costs.

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