Shell-and-tube dry type evaporator

Abstract

The invention discloses a shell-and-tube dry type evaporator. The shell-and-tube dry type evaporator comprises a distributor, arch-shaped baffle plates, heat exchange tubes and a barrel; one end of the barrel is closed, the other end of the barrel is open, the heat exchange tubes and the arch-shaped baffle plates are arranged in the barrel, the heat exchange tubes penetrate through the arch-shaped baffle plates, and a multi-stage distributor is arranged at the open end of the barrel; holes are formed in the top and the bottom of the barrel separately, a water side inlet pipe is mounted in the hole in the bottom, and a water side outlet pipe is mounted in the hole in the top; and a distribution channel is machined in the lower portion of an end cover and communicates with inlets of the heat exchange tubes, a convergence cavity is machined in the upper portion of the end cover and communicates with an outlet of a heat exchanger, and an outlet is formed in the convergence cavity. According to the shell-and-tube dry type evaporator, the distributor is simple in structure, can be machined through laser cutting, linear cutting and other machining methods, and is low in manufacturing cost and convenient to popularize and use on a large scale; and through the design and use of an inlet distributor and the arch-shaped baffle plates, the amount of heat exchange tubes is reduced by 30% or above.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, in particular to a shell-and-tube dry evaporator. Background technique [0002] Shell and tube heat exchanger is the most widely used form of heat exchanger, which has the advantages of simple structure, strong adaptability and easy maintenance. Its main components include cylinder, end cover, tube sheet, baffle plate, heat exchange tube, etc. Shell and tube heat exchangers are widely used in air conditioning and refrigeration equipment as evaporators / condensers. Some existing shell-and-tube heat exchangers have the following disadvantages when used as evaporators / condensers: the flow rate of the working medium in each heat exchange tube is not uniform, resulting in different heat transfer conditions and low heat transfer efficiency; The margin results in a waste of heat exchange area; the refrigerant is prone to leakage; the processing method is complicated, and the processing equipmen...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low working efficiency of the existing shell-and-tube heat exchanger, and propose a new structure of the shell-and-tube dry evaporator, which can save the length of the heat exchange tube and greatly improve the working efficiency of the heat exchanger

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