A high-efficiency compact capillary heat exchanger

Abstract

The invention discloses an efficient and compact capillary tube heat exchanger. The heat exchanger comprises a barrel body, first-stage capillary tubes, second-stage collecting tubes and third-stagering tubes, wherein the first-stage capillary tubes are connected with the second-stage collecting tubes through brazing, and the second-stage collecting tubes are converged into the third-stage ringtubes; and a heat exchange tube pass adopts three-stage tube bundles and is finally converged into an inlet tube and an outlet tube. According to the novel, compact and efficient capillary tube heat exchanger, the heat exchange efficiency of the heat exchanger is greatly improved, the heat exchange coefficient is large under the same working condition, and the same heat can be exchanged with a small heat exchange area needed; the structure of the heat exchanger is compact, and thus the size and the weight of the heat exchanger are greatly reduced; meanwhile, due to the novel tube distributionmode, the lengths of the capillary tubes are effectively reduced, and the problem that the pressure drop caused by the capillary tubes is too high can be solved; and a baffle plate capable of supporting and baffling can increase shell pass turbulence, so that the heat exchange efficiency and the heat transfer coefficient of a shell pass are improved.

Description

technical field [0001] The invention relates to the field of tubular heat exchangers, in particular to an efficient and compact capillary heat exchanger. Background technique [0002] Tube heat exchanger is the most typical partition heat exchanger, it has a long history of industrial application, and still occupies a dominant position in all heat exchangers. As an important unit equipment in chemical production, it often has a large volume and tonnage, accounting for 30% of the entire process equipment. The large-scale trend of tubular heat exchangers is obvious. When the heat transfer required by the application conditions becomes larger, the heat exchange area needs to be increased accordingly, and the number and length of the tubes need to be increased, which increases the volume and size of the heat exchange equipment. weight. [0003] At present, capillary technology has begun to be used in the chemical industry, but no reasonable structure and scheme has been propos...

AI Technical Summary

Problems solved by technology

It can be seen that when the capillary diameter d is small, the overall pressure drop ΔP is larger than that of ordinary heat exchange tubes, and the formula shows that the longer the tube length of the capillary, the greater the pressure drop. When using the ordinary shell-and-tube heat exchanger When the capillary tubes are arranged in the way of tube arrangement, the pressure drop of the overall heat exchanger tube side will be too large and exceed the standard

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