A flat-plate falling-film freeze-concentrator and its freeze-concentrate method

Abstract

The invention provides a flat plate falling film type freeze concentrator and a freeze concentration method thereof. The flat plate falling film type freeze concentrator comprises a shell, and the interior of the shell is divided by heat conducting separation plates into a falling film freezing chamber, a temperature control chamber and a concentrated liquid collecting chamber. The heat conducting separation plate between the temperature control chamber and the falling film freezing chamber is a falling film freezing plate, and the heat conducting separation plate between the concentrated liquid collecting chamber and the falling film freezing chamber is an ice water collecting plate. A solid-liquid separating net opening enabling the falling film freezing chamber and the concentrated liquid collecting chamber to be communicated is formed in the end, close to the falling film freezing plate, of the ice water collecting plate. A solution inlet pipe, a concentrated liquid recycling pipe, a solution pump and a storage tank are communicated for backflow. According to the flat plate falling film type freeze concentrator and the freeze concentration method thereof, a falling film mode is adopted for cooling capacity exchange, the flowing speed of a falling film solution is scientifically controlled, the pre-cooling temperature of the solution and the temperature of a secondary refrigerant are precisely controlled, and ice on a falling film frozen face grows in a single ice crystal mode as much as possible, so that the formed ice layer is little in entrained solute and effective ingredient loss.

Description

technical field [0001] The invention belongs to multiple technical fields, such as pharmaceutical engineering, food engineering, chemical industry, biochemical engineering and environmental protection engineering, and relates to freeze concentration, in particular to a flat falling film freeze concentrator and a freeze concentration method thereof. Background technique [0002] Freeze concentration, as a non-heating concentration technology, can retain the original fresh flavor and nutrition of food to the greatest extent, and the loss of volatile aromatic components and changes in heat-sensitive components such as enzymes and pigments are minimal. Its unique advantages will become food Processing, one of the hotspots in the production of traditional Chinese medicine decoction, has great potential in practical application. The current freeze concentration technologies mainly include drum type, suspended ice crystal type, and air flow type. The entrainment rate of ice crystal...

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a flat falling film freeze concentrator and its freeze concentration method, which fundamentally solves the problem of solute entrainment in the ice crystal growth process, and the ice crystals formed have high purity. The separation is convenient and thorough, and it is a good concentration and separation equipment

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