Pipe-shell-type heat exchanger

Abstract

The invention discloses a pipe-shell-type heat exchanger. The pipe-shell-type heat exchanger comprises a shell-side cylinder body, a pipe-box cylinder body, a pipe plate and a heat exchanging pipe. The heat exchanging pipe is fixed to the pipe plate, and a main body of the heat exchanging pipe is arranged in the shell-side cylinder body. A baffling rod assembly is arranged in the shell-side cylinder body and comprises a plurality of first baffling rods and a plurality of second baffling rods. Each first baffling rod comprises a connecting part, a first baffling part and a second baffling part,wherein the first baffling part and the second baffling part are connected with the two ends of the connecting part correspondingly. The first baffling rods are used for forming a double helix flow channel. Compared with the prior art, the pipe-shell-type heat exchanger has the following advantages that a shell-side fluid is arranged along with the first baffling rods and forms a double helix flow on the shell side, thus the shell-side fluid rotates and flushes a heat exchanging pipe bundle along with the double helix flow channel formed between the first baffling rods while passing through the first baffling rods and obliquely skimming over the heat exchanging pipe, the effect of heat transfer enhancing is improved, isochronous flow dead zones of the bow-shaped baffling rods are reduced,and the heat exchanging effect is enhanced.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, more specifically, the invention relates to a shell-and-tube heat exchanger used in industrial sectors such as nuclear energy and nuclear power. Background technique [0002] At present, the existing shell-and-tube heat exchangers with bow-shaped baffles have the following problems: 1) The bow-shaped baffles cause high-speed fluid to sweep across the heat exchange tube bundle, which is easy to induce vibration; 2) There is a flow dead zone in the baffles, which reduces the 3) The baffles make the fluid vertically impact the shell wall and cause a large pressure drop along the way. [0003] In order to overcome the shortcomings of the existing bow-shaped baffle plate shell-and-tube heat exchanger, the prior art uses a baffle rod shell-and-tube heat exchanger, and the baffle rod shell-and-tube heat exchanger arranges the baffle rods in the heat exchanger Although the flow resistance and leak...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing shell-and-tube heat exchangers with bow-shaped baffles have the following problems: 1) The bow-shaped baffles cause high-speed fluid to sweep across the heat exchange tube bundle, which is easy to induce vibration; 2) There is a flow dead zone in the baffles, which reduces the 3) The baffles make the fluid vertically impact the shell wall and cause a large pressure drop along the way

[0003] In order to overcome the shortcomings of the existing bow-shaped baffle plate shell-and-tube heat exchanger, the prior art uses a baffle rod shell-and-tube heat exchanger, and the baffle rod shell-and-tube heat exchanger arranges the baffle rods in the heat exchanger On the same cross-section of the same cross-section, although the flow resistance and leakage flow are reduced to a certain extent, the above-mentioned baffle rod heat exchanger is completely a vertical flow heat exchanger, and the heat exchange efficiency can still be improved.

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