A high-efficiency phase-change plate evaporator

Abstract

The invention discloses an efficient phase change plate-type evaporator which comprises multiple evaporation and heat exchange plates. The evaporation and heat exchange plates are arranged between a front end plate and a rear end plate, and the front end plate and the rear end plate are connected through a pull rod. The efficient phase change plate-type evaporator is compact in structure, small in size, difficult to scale and easy to dismount, clean and maintain, the steam and concentrated solution produced in evaporation and concentration of the solution on an evaporation side can upwards and downwards flow from different orientations of outlets, the steam in the solution is rapidly separated and led out, bubble condensation is avoided, the influence of bag-shaped bubbles on heat transfer is reduced, and meanwhile boiling heat transfer and vapor-liquid separation are achieved efficiently. In addition, the condensate produced by the high-temperature secondary steam condensation phase on a condensation side is rapidly and timely discharged out, the influence of bridging liquid on heat transfer is reduced, accordingly the evaporation and heat exchange efficiency is improved greatly, and the problem that an existing plate-type evaporator is not high in heat exchange efficiency is solved.

Description

Technical field: [0001] The invention relates to the technical field of evaporation and concentration, in particular to a high-efficiency phase-change plate evaporator. Background technique: [0002] In the evaporation and concentration process in the fields of food, pharmaceuticals and sewage treatment, the tube evaporator is currently the most widely used evaporator. This type of evaporator has the advantages of simple structure and convenient processing, but it also has disadvantages such as low heat transfer efficiency, large volume, easy scaling, and frequent maintenance. In order to overcome the above shortcomings, people have increased the research on phase change plate evaporators. [0003] The structure of the existing ordinary phase change plate evaporator is not much different from the commonly used plate heat exchanger. Only according to the change of the fluid phase change flow rate, the diameter of the inlet and outlet pipes has been adjusted. When it is applie...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency phase-change plate evaporator, which has compact structure, small volume, is not easy to scale, and is easy to disassemble and clean and maintain. The steam and concentrated liquid produced by evaporation and concentration flow up and down in different directions, and the steam in the solution is quickly separated and exported, avoiding the condensation of bubbles, reducing the influence of cystic bubbles on heat transfer, and realizing boiling transfer efficiently. Heat and vapor-liquid are separated; moreover, the condensate produced by the high-temperature secondary steam condensation phase transition on the condensation side is quickly and timely discharged, reducing the influence of the bridging liquid on heat transfer; thus greatly improving the evaporation heat transfer efficiency and solving the problem of Solved the problem of low heat exchange efficiency of the existing phase change plate evaporator

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