A glycerol purification device and process for effectively removing methanol and moisture.

By combining multi-effect evaporation technology and multi-component separation technology with heat reuse, the problem of high energy consumption in the separation of glycerol, methanol and water in biodiesel production has been solved, achieving efficient purification of glycerol and significant reduction in energy consumption, and is applicable to a variety of separation processes.

CN117883800BActive Publication Date: 2026-06-30TANGHE JINHAI BIOLOGICAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TANGHE JINHAI BIOLOGICAL TECH CO LTD
Filing Date
2023-12-25
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing biodiesel production processes, the separation of the three phases of glycerol, methanol, and water is energy-intensive, especially when separating methanol and water.

Method used

An apparatus comprising a crude glycerol feeding system, a methanol forced circulation evaporation system, a water forced circulation evaporation system, a glycerol concentration and cooling system, a heat reuse system, a methanol vacuum recovery system, and a dehydration vacuum system is used to achieve efficient separation of methanol and water by comprehensively utilizing the latent heat in the gas condensation process through multi-effect evaporation technology and multi-component separation technology.

Benefits of technology

It reduces energy consumption, improves energy efficiency, reduces condenser area requirements, achieves efficient purification of glycerol, and is applicable to other separation processes such as the concentration of toluene and aniline, cyclohexanol and benzoic acid.

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Abstract

This invention discloses a glycerol purification device capable of effectively removing methanol and water, comprising a crude glycerol feeding system, a methanol forced circulation evaporation system, a water forced circulation evaporation system, a glycerol concentration and cooling system, a heat recovery system, a methanol vacuum recovery system, and a dehydration vacuum system. The crude glycerol feeding system includes a crude glycerol feeding pump and a preheater. The methanol forced circulation evaporation system includes a first evaporator separator, a first methanol evaporator, a first forced circulation pump, and a circulation extraction pump. The methanol vacuum recovery system includes a methanol condenser, a first screw vacuum pump, a tail gas condenser, a tail gas separator, a methanol collection tank, and a methanol extraction pump. The water forced circulation evaporation system includes a second evaporator separator, a first water evaporator, a second forced circulation pump, and a first evaporator extraction pump. The dehydration vacuum system includes a water condenser, a second screw vacuum pump, a condensate collection tank, and a condensate extraction pump. This invention is applicable not only to the removal of methanol and water to purify glycerol during biodiesel production but also to the separation of three-component mixtures with different boiling points, and is applicable to separation and concentration fields such as wastewater treatment, food, pharmaceuticals, and chemicals.
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Citation Information

Patent Citations

  • Glycerol purification device capable of effectively removing methanol and moisture

    CN221905796U