Capsanthin solvent extracting solution evaporation method and device

Abstract

The invention provides a capsanthin solvent extracting solution evaporation method. The method comprises the following steps that 1, a capsanthin solvent extracting solution enters a climbing film evaporator at first, and vacuum evaporation is performed; 2, a liquid phase obtained after flashing is performed in the step 1 enters a falling film evaporator, flows from top to bottom in the tube pass of the falling film evaporator, and is subjected to heat exchange with hot water under the temperature of 70-80 DEG C inside the shell pass of the falling film evaporator; 3, the liquid phase drained by the falling film evaporator enters a rotary film evaporator, and vacuum evaporation is performed; 4, the liquid phase at the bottom of the rotary film evaporator enters a molecular distillation evaporator, and distillation is performed under the vacuum condition. According to the method, climbing film evaporation, falling film evaporation, rotary film evaporation and molecular distillation evaporation equipment and operation technological conditions are reasonably set, the evaporation temperature is low, energy consumption is lowered, the treatment efficiency is high, the solvent consumption is small, the cost is greatly lowered, and continuous industrial production is achieved easily.

Description

technical field [0001] The invention belongs to the field of extraction of vegetable raw materials, and in particular relates to an extraction method using evaporation equipment. Background technique [0002] As a natural pigment, paprika has the characteristics of strong coloring ability, bright color, good stability and high safety. It is widely used in meat products, flour products, soy products and pickled vegetables, and is the most widely used natural oil-soluble pigment at present. [0003] Solvent extraction is generally used in the industrial production of capsanthin. The traditional capsanthin solvent evaporation process has the disadvantages of small processing capacity, high temperature, high loss of capsanthin, unsatisfactory precipitation effect, and high solvent consumption. The main component of capsanthin is oil, but its extract has many impurities and is a heat-sensitive substance, which puts forward higher requirements for the processing technology. Ther...

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Problems solved by technology

[0004] In the patent with the publication number CN102504947A, the solvent in the cottonseed mixed oil is recovered by using a rising film evaporator connected to a short-range evaporator, but because there are many impurities in the capsanthin solvent extract, when the solvent content is low, using a rising film evaporator is easy to cause Blockage, this process is not suitable for the concentration of capsanthin extract

In the research on the improvement of capsanthin extraction process (the influence of solvent extraction of capsanthin on the absorbance ratio, Su Guangping, China Food Additives, 2014 (4)), the capsanthin extract was evaporated using a rising film evaporator, and the second evaporation was performed using a thin film The evaporator and the three steams are refined by nitrogen desolvation. Because nitrogen desolventization is a tank group operation, there are problems such as long desolventization time, small processing capacity, high energy consumption, and large loss of color value.

In the paper "Effect of Solvent Extraction of Capsanthin on Absorption Ratio", falling film evaporation, rising film evaporation, and thin film evaporation were used in sequence to evaporate the extract solution. The residue is still high, which will cause mixed pollution of different solvents in the subsequent treatment

In conclusion, traditional solvent evaporation has various disadvantages and is not an ideal process for large-scale industrial production of capsanthin.

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