Falling-film evaporator

Abstract

The invention provides a falling-film evaporator. The falling-film evaporator comprises an outer shell, an upper partition plate, a lower partition plate and a heat exchange tube, wherein the upper partition plate, the lower partition plate and the heat exchange tube are vertically arranged in the outer shell; the upper partition plate and the lower partition plate are used for dividing an inner cavity of the outer shell into a first cavity, a second cavity and a third cavity; the first cavity and the second cavity are formed on two sides of the upper partition plate; the second cavity and the third cavity are formed on two sides of the lower partition plate; one end of the heat exchange tube is inserted into the upper partition plate and communicated with the first cavity; the other end of the heat exchange tube is inserted into the lower partition plate and communicated with the third cavity; a feeding opening is formed in the first cavity; the third cavity is provided with a discharging tube; the falling-film evaporator also comprises an evaporation chamber; an outlet of the discharging tube is formed in the evaporation chamber; a jet pump is arranged at the upper part of the evaporation chamber; a discharging opening is formed in the lower part of the evaporation chamber. The falling-film evaporator is capable of recycling heat energy and introducing recycled hot steam into a next-level falling-film evaporator, so that energy is greatly saved.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to an evaporator. Background technique [0002] The current commonly used evaporators are all heated by steam. Most of them are recycled in order to improve the utilization rate of steam. However, there is still a lot of heat that can be recovered for the finished liquid, which is ignored in the prior art. Contents of the invention [0003] The object of the present invention is to provide a falling film evaporator, which solves the problem that the heat of the finishing liquid is easy to be ignored in the above-mentioned prior art problem. [0004] The invention provides a falling film evaporator, which includes an outer casing and an upper partition, a lower partition and heat exchange tubes vertically arranged inside the outer casing, the upper partition and the lower partition divide the inner cavity of the outer casing into first The first cavity, the second cavity and the thi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a falling film evaporator, which solves the problem that the heat of the liquid is easily ignored in the above-mentioned prior art problems

Images