Tube-shell type evaporating/condensing heat exchanger

Abstract

The invention discloses a tube-shell type evaporating / condensing heat exchanger which comprises a shell, sprayers, a condenser and an evaporator, wherein the sprayers, the condenser and the evaporator are arranged in the shell; the sprayers are arranged at the middle part of the shell; the condenser is arranged above the sprayers; the evaporator is arranged below the sprayers; during operation, the sprayers jet phase change fluid to the evaporator; after generating falling film heat transfer with the evaporator, the phase change fluid is evaporated from liquid into gas; the gas rises up into the condenser, and then after being subjected to heat exchange with the condenser, the gas is condensed into the liquid falling back to the bottom of the shell; and the phase change fluid at the bottom of the shell returns the sprayers and then is continuously sprayed, thus completing full-closed cyclic evaporation and condensation. By use of the characteristic of the falling film heat transfer, the tube-shell type evaporating / condensing heat exchanger disclosed by the invention greatly reduces heat transfer heat resistance, and is high in heat transfer efficiency, low in energy consumption and outstanding in energy saving effect.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a shell-and-tube evaporation / condensation heat exchanger. Background technique [0002] Heat exchanger is a general equipment widely used in chemical industry, power, refrigeration, medicine and energy industries. According to the structure and shape of the heat transfer surface, heat exchangers can be divided into plate heat exchangers, tube heat exchangers and other types of heat exchangers. Among them, plate heat exchangers mainly include spiral plate heat exchangers, plate heat exchangers, plate-fin heat exchangers and plate-shell heat exchangers; tubular heat exchangers mainly include coil heat exchangers, casing heat exchangers Heat exchangers and shell-and-tube heat exchangers; other types of heat exchangers are mainly heat exchanger devices that meet special requirements, such as rotary heat exchangers and heat pipe heat exchangers. Among many heat exchangers, the shell-a...

AI Technical Summary

Problems solved by technology

[0003] The phase-change shell-and-tube heat exchanger developed on the basis of the shell-and-tube heat exchanger has attracted much attention due to its high heat exchange efficiency. The existing phase-change shell-and-tube spray heat exchanger generally refers to the shell-and-tube condensing The shell-and-tube evaporator or shell-and-tube evaporator has different uses. The shell-and-tube condenser is mainly used to condense gas to obtain liquid, while the shell-and-tube evaporator is mainly used to evaporate liquid to obtain gas. The two are often used for the entire heat exchange The different shells of the system can realize their respective functions, but it also causes the disadvantages of large equipment occupation and high cost.

Images