Pleietrepie counter current falling film evaporator for recycling organic solvent
A technology of falling film evaporation and falling film evaporator, which is applied in the field of chemical engineering, can solve the problems of large energy consumption of evaporators, large amount of cooling water, and the inability to use aqueous organic solvent extracts to evaporate and concentrate, and achieve convenient operation and simple control , Improve the effect of evaporation efficiency
Inactive Publication Date: 2010-02-03
DALIAN UNIV OF TECH
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Problems solved by technology
[0008] 3. If this kind of evaporator is not made into multi-effect, single-effect evaporator consumes a lot of energy and consumes a lot of cooling water
[0010] 5. The use of this external circulation multi-effect downstream evaporator cannot be used for evaporation and concentration of aqueous organic solvent extracts
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[0052] A three-effect countercurrent falling film evaporation system is adopted, the extractant of the tartary buckwheat flavonoid extract is alcohol aqueous solution, and the recovered organic solvent is the alcohol aqueous solution, and the concentrated solution of the tartary buckwheat flavonoid extract is obtained at the same time.
[0053] For the connection relationship between the equipment of the three-effect evaporation system, please refer to the attached figure 2 , please refer to the "Process Flow" description in the "Instructions" section for the material flow.
[0054] The organic solvent recovery process of tartary buckwheat flavonoids extract; (see table 1 for operating parameters)
[0055] 1) Loading work
[0056] Check that the system is in a startable state. First, start the vacuum pump to create a vacuum in the system. The tartary buckwheat flavonoid extract (dilute liquid) enters the vapor-liquid separation chamber at the bottom of the third-effect fallin...
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The invention provides a multiple effective reflux falling film evaporation system used for recycling organic solvent. The invention is mainly used for recycling the solvent in water solution of the organic solvent during the concentration production process of plant extractions in food industry and biopharmaceutical industry. The invention adopts falling film evaporators with high heat transmission coefficient and small terminal temperature difference to form the multiple effective evaporation system. Each evaporator is provided with a solution circulating pump which increases down-flow quantity in a heat transfer tube and avoids dry wall of a heat transfer surface and enhances heat transferring, thus having great evaporation ability and high efficiency. The condensate of each evaporatorenters into a corresponding condensate tank respectively and is discharged by the pump and recycled. A gas-phase communicating pipe is arranged between the condensate tank and a gas-liquid separator,which guarantees the discharge of noncondensable gas under vacuum operation condition, thus being beneficial for improving condensing and heat transferring efficiency. The evaporation system of the invention is a new technique, new technology and new device used in concentration process of the extractions of the organic solvent and used for recycling solvent, which has high recycling rate, littleenergy consumption and convenient operation and can use a vacuum low temperature evaporation concentration production device in continuous and intermittent production operation.
Description
technical field [0001] The invention relates to a new process, a new technology and a new device for recovering organic solvents by using a multi-effect countercurrent falling film evaporation system in the field of chemical engineering. It is mainly used for solvent recovery in the process of evaporation and concentration of plant extracts in organic solvent aqueous solutions, and at the same time to obtain concentrated solutions or crystallized products. Background technique [0002] Active ingredients are extracted from plant resources, with various varieties and different properties. These active ingredient extracts are often raw materials for functional foods, cosmetics and biopharmaceuticals. [0003] For plant extraction, solvent water or organic solvents such as ethanol, ether, acetone, petroleum ether, etc. should be selected as the extractant according to the nature of the active ingredients in the plant. According to the nature of the extract and the selectivity...
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IPC IPC(8): B01D1/26
CPCY02P70/10
Inventor 马学虎白涛孙力刘春祥林载祁
Owner DALIAN UNIV OF TECH