A tube-type falling film evaporator, a concentration device and its use method and process

Abstract

The invention discloses a tube-type falling film evaporator, a concentrating device and its use method and process; it includes a first evaporation unit, a second evaporation unit, a third evaporation unit and a fourth evaporation unit; the first evaporation unit consists of a wet The secondary steam generated by the protein drying process is used as a heat source, the second evaporation unit uses the secondary steam generated by the first evaporation unit as a heat source, and the third evaporation unit adopts the MVR evaporation process, and the secondary steam generated by it is After being pressurized and heated by a mechanical compressor, it is used as the heat source of the third evaporation unit, and the fourth evaporation unit uses water vapor as the heat source; the evaporators of the first evaporation unit, the second evaporation unit and the third evaporation unit are all tube-type Falling film evaporator, the present invention can improve the equipment utilization rate, thereby greatly reducing the production cost of the enterprise, and bringing greater economic benefits to the enterprise.

Description

technical field [0001] The invention relates to the technical field of evaporating and concentrating dilute syrup, especially the evaporating and concentrating process of dilute syrup used in the preparation of concentrated soybean protein by alcohol method, in particular to a tube-type falling film evaporator, a concentrating device and its use method and process. Background technique [0002] In the process of preparing soybean protein concentrate by the mainstream alcohol method, five major processes are involved, including soybean meal extraction, wet protein drying, dilute syrup evaporation and concentration, secondary steam condensation, and tail gas recovery, among which: wet protein drying process and dilute syrup evaporation concentration process are Two high-energy-consuming processes. Wet protein drying process, the current mainstream process is to use the heating method of the partition wall of the dryer to dry and remove the ethanol and water contained in the so...

AI Technical Summary

Problems solved by technology

[0003] During the syrup evaporation and concentration process, due to the high viscosity of the syrup, it is very easy to stick to the inner wall of the evaporation tube. At the same time, due to the use of steam heating, the temperature difference between the inside and outside of the evaporation tube wall is 70-90 ° C, resulting in the syrup being easily gelatinized. Wall hanging reduces the effective surface area of ​​mass transfer and heat transfer of the evaporating tube. It needs to be shut down every 1-2 months to clean the evaporating tube. It needs to be shut down for at least 48 hours for one cleaning. Shutdown cleaning not only increases various consumptions, but also delays production. , which increases the production cost of the enterprise

[0004] The dilute syrup evaporation process in the mainstream alcohol method to prepare concentrated protein production process not only consumes a lot of energy, but also needs to be shut down for 1-2 months for 48 hours to clean the evaporation tube, which not only wastes precious energy, but also increases the production cost of the enterprise. Increased the burden on upstream and downstream enterprises, and also affected the promotion and application of alcohol-based concentrated protein

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