A shell-and-tube heat exchanger containing noncondensable gas

Abstract

The invention provides a shell-and-tube heat exchanger comprising a shell. Sealing heads are arranged at the two ends of the shell, pipe plates are arranged at the connection positions of the sealingheads and the shell, a heat exchange pipe is connected with the pipe plates at the two ends, a gas phase in gas-liquid two-phase flow is insoluble or poorly-soluble gas, in other words, the gas cannotbe dissolved in liquid in the heat exchange process, a separating device is arranged in the heat exchange pipe and is of a sheet-like structure, and the sheet-like structure is arranged on the crosssection of the heat exchange pipe; and the separating device is composed of square through holes and regular octagonal through holes, the side length of the square through holes is equal to the side length of the regular octagonal through holes, the four sides of each square through hole are the sides of four different regular octagonal through holes, and the four mutually-spaced sides of each regular octagonal through hole are the sides of four different square through holes. According to the heat exchanger with the separating device of the new structure, when the gas-liquid two-phase flow exists in the pipe, compared with the background art, heat transfer is further enhanced, vibration of the pipe is weakened, and the noise level is reduced.

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 is widely present in heat exchange devices. For example, non-condensable gas is mixed in the heat exchange process, or non-condensable gas generated due to aging of equipment during fluid transportation, as well as natural gas. Condensation of mixed media with different boiling points, air separation, mixed refrigerant refrigeration, petroleum or waste plastics cracking, production in the process of liquefaction (the main components are methane with boiling point -162℃, ethane with boiling point -88℃, propane with boiling point -42℃, etc.) The main technological process in industries such as material gas production. [0003] Due to the presence of gas phase in the heat exchange process of fluids containing non-condensable gases, the ...

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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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