Three-Stage Continuous Falling Film Cycle Evaporation and Concentration System with Mechanical Vapor Recompression

Abstract

The invention provides a three-stage continuous falling-film circulating evaporation concentration system with machinery vapor recompression, which comprises a stock solution pot, the stock solution pot is successively connected to a charge pump, a condensed water preheater and a live steam preheater, and then is connected to a one-piece falling-film circulating evaporation separator, a first-stage circulating pipeline and a second-stage circulating pipeline are formed, and the three-stage continuous falling-film circulating evaporation concentration system with machinery vapor recompression comprises a second-stage steam circulating pipe, a second-stage condensed water circulating pipe and a second-stage non-condensable gas circulating pipeline, and effect of energy recuperation and steam cycle usage can be realized. The three-stage continuous falling-film circulating evaporation concentration system with machinery vapor recompression can satisfy continuous feeding and discharge condensation production requirement, an application of a depth concentrator greatly reduce the stay and cycle time of the material, heat sensitivity component in the solution can be fully protected, condensed water is employed for preheating waste heat from recovery of condensed water, a compressor is employed for collecting secondary steam, material to be evaporated can be performed with cyclic heating by the secondary steam, so that energy can be greatly saved.

Description

technical field [0001] The invention relates to a continuous concentration system, in particular to an energy-saving continuous concentrator, that is, a continuous falling film circulation evaporation concentration system with mechanical vapor recompression. Background technique [0002] Concentration is an important link in the production of traditional Chinese medicine. In the traditional concentration equipment, the material is first loaded into the evaporator, and then the equipment is operated for a period of time. When the solution is concentrated to a certain concentration, the discharge pump is turned on to discharge the concentrate, and the feed is turned on again after the concentrate is emptied. Load the stock solution into the valve and repeat the above process. This makes it impossible to carry out continuous production between production intervals, resulting in the disadvantages of low evaporation efficiency, small production capacity, and high labor intensity...

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Problems solved by technology

[0003] For example, the Chinese patent double-effect falling film MVP evaporation system whose publication number is CN104307195A adopts the double-effect falling film evaporation method, adopts two times of concentrated liquid discharge, and uses two times of steam and condensed water, which greatly increases the number of equipment, and at the same time The waste heat of secondary steam and condensed water is wasted, resulting in waste of energy, and at the same time, the demand for continuous production cannot be realized

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