Continuous helical deflecting plate pipe and shell type heat exchanger

Abstract

The present invention relates to a continuous spiral deflector shell-and-tube heat exchanger. Said heat exchanger includes the following components: shell body, central tube, baffle plate, head plates, heat-exchanging tube bundle and continuous spiral deflector. Said invention also provides their connection mode and the concrete structure of said heat exchanger. Said invention is more compact in structure and can greatly raise heat-exchanging efficiency.

Description

technical field [0001] The invention relates to a shell-and-tube heat exchanger used in oil refining, chemical industry, environmental protection, energy, electric power and other industries, in particular to a shell-and-tube heat exchanger with continuous spiral baffles. Background technique [0002] Heat exchanger is an important unit equipment in oil refining, chemical industry, environmental protection, energy, electric power and other industries. Usually in the construction of chemical plants, heat exchangers account for about 10-20% of the total investment; especially in refineries, heat exchangers Heaters account for about 35-40% of all process equipment investment. Shell and tube heat exchangers account for 37% of the total heat exchanger market in the world. In a shell and tube heat exchanger, one fluid flows inside the tubes and the other fluid flows on the shell side and exchanges heat through the tubes. At the same time, baffles are arranged on the shell side, ...

AI Technical Summary

Problems solved by technology

[0003] There are many problems in the traditional bow-shaped baffles: ①The bow-shaped baffles cause the fluid to impact the shell wall vertically, resulting in a large pressure drop along the way; , reduces the heat transfer efficiency, and is easy to scale; ③There is leakage between the baffle and the shell wall and between the heat exchange tube and the baffle, so that there is a large bypass flow on the shell side

[0005] However, the existing helical baffles are almost all discontinuous approximate helical surfaces

The baffles of discontinuous spiral baffle heat exchangers are generally composed of two to four fan-shaped flat plates (see patent 200320106763.1), and the result is often far from the real spiral surface. Generally, there is a triangular area, and there is a serious leakage problem, which leads to an increase in the flow resistance on the shell side of the heat exchanger, and also affects the heat transfer performance of the heat exchanger.

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