A Design Method for Tube Spacing of Noncondensable Gas Shell-and-Tube Heat Exchanger

Abstract

The invention provides a design method for the tube distance of a shell and tube heat exchanger. A division device is arranged in each heat exchange tube and is of a flaky structure. The flaky structures are arranged on the cross sections of the heat exchange tubes. The tube distance of the heat exchange tubes is designed by adopting an optimization method. The design method for the tube distanceof the heat exchanger with the partition devices of new structures is provided, and shock absorption and noise reduction are optimized under the condition of preferentially meeting normal flowing resistance.

Description

technical field [0001] The invention relates to a shell-and-tube heat exchanger, in particular to a two-phase flow heat exchanger containing non-condensable gas. Background technique [0002] Two-phase flow heat exchange containing non-condensable gas widely exists in heat exchange devices, for example, non-condensable gas is mixed in the heat exchange process, or non-condensable gas is produced due to equipment aging during fluid transportation, and natural gas, for example Condensation of mixed media with different boiling points, air separation, mixed refrigerant refrigeration, petroleum or waste plastic cracking, production The main technological process of industries such as material gas production. [0003] The existence of the gas phase in the heat exchange process of the fluid containing non-condensable gas will lead to low heat exchange efficiency, worse heat exchange, unstable fluid flow process, and water hammer phenomenon. When the gas-liquid phase of the two-p...

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Problems solved by technology

[0005] The inventor also designed a variety of heat exchanger devices to solve the above problems in the previous application, such as multi-tube type, but this kind of device found in operation, because the tubes are tightly combined, so the gap between the three tubes The formed space A is relatively small, because the space A is formed by the convex arc of three pipes, so most of the space A is narrow, which will make it difficult for the fluid to enter and pass through, resulting in a short circuit of the fluid, which affects the heat exchange of the fluid and cannot function good flow stabilization

Simultaneously because the many tubes of above-mentioned structure are combined together, manufacture difficulty

Another example is the 2017102671998 structure. Although this structure solves the fluid short circuit phenomenon, there is a problem that the flow area is greatly reduced, resulting in an increase in flow resistance.

Another example is the annular partition device of 2017103224953. In the annular structure, the partition device adopts a ring structure, which results in uneven separation of the annulus of the partition device in the circumferential direction, and because of the ring structure, the positions of the four included angles of the annulus appear less than Acute angles of 90 degrees, which can cause problems with shorting fluid flow at acute angles less than 90 degrees

[0006] In view of the above problems, the present invention has been improved on the basis of the previous invention, and a new heat exchanger is provided, so as to solve the problem of steady flow and uneven heat exchange in the case of heat exchange with heat exchange tubes

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