Hollow spiral-blade heating thin-film evaporator and evaporation method

Abstract

The invention discloses a hollow spiral-blade heating thin-film evaporator and an evaporation method. The hollow spiral-blade heating thin-film evaporator comprises a heating evaporation tank; a feeding pipe is arranged on the upper tank wall of the heating evaporation tank; a discharging pipe is arranged under the lower tank wall of the heating evaporation tank; a hollow spiral-blade heating device is arranged in the heating evaporation tank; the hollow spiral-blade heating device comprises a hollow rotary shaft tube arranged at two ends of the heating evaporation tank through bearing blocks;the transmission end of the hollow rotary shaft tube is provided with a speed reducing motor; an intercepting plate is arranged in the middle of the hollow rotary shaft tube; the outer wall of the hollow rotary shaft tube is provided with a hollow and continuous spiral blade; and two end openings of the spiral blade are respectively arranged at two ends of the intercepting plate and communicate with the hollow rotary shaft tube. Ultralow-temperature evaporation and high-viscosity evaporation are realized through a method of carrying out liquid ultralow-temperature evaporation and high-viscosity evaporation by utilizing the hollow spiral-blade heating thin-film evaporator, and the characteristics of high heat transfer efficiency and good material uniformity are achieved.

Description

technical field [0001] The invention relates to an evaporator, in particular to a thin-film evaporator heated by hollow spiral blades and an evaporation method, in particular to an ultra-low temperature evaporation and a high-viscosity evaporation method. Background technique [0002] During the concentration process of many materials, such as heat-sensitive proteins, low-temperature evaporation is required to maintain the activity of the materials, and some materials, such as honey, need to be concentrated to a very high concentration for easy storage. Existing evaporators, in order to achieve liquid ultra-low temperature evaporation and high viscosity evaporation, often use thin film evaporation technology, that is, the material is formed on the surface of the heating body to form a thin film, so that the evaporation speed can be increased and the evaporation temperature can be reduced. That is, the thinner the material, the easier it is to evaporate. [0003] In order to...

AI Technical Summary

Problems solved by technology

The disadvantage of this equipment is that the processing accuracy is high, and the scraper needs to be closely matched with the inner wall of the steel plate to ensure that the liquid is evenly distributed.

At the same time, the surface area of ​​the structure is limited, and it is impossible to produce large-scale equipment. The largest equipment area is only 20 square meters, and the power consumption of the rotating scraper is high.

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