Heat exchanger with heat exchange surface capable of rotating so as to strengthen heat exchange

Abstract

The invention relates to a heat exchanger, in particular to a heat exchanger for viscous fluid with poor liquidity. The heat exchanger can be used for the fields of chemical engineering, petrochemical industry, food, medicine, papermaking, ships and the like and comprises a shell, an inner barrel, a motor, a heat exchange medium a, a heat exchange medium b, a bearing a and a bearing b; a fluid inlet and an outlet are arranged at the upper end and the lower end of the shell and are located at two ends of the shell; through holes are arranged at the left end and the right end of the shell, and annular grooves are arranged on the through holes; two ends of the inner barrel are necking structures; the heat exchange surface is capable of rotating, so that heat exchange area is increased, disturbance is improved so as to strengthen heat exchange, and the heat exchange medium a and the heat exchange medium b do not permeate to each other; and as hermetic connection between a rotating pipeline and an outer barrel is in non-elastic contact dynamic sealing, mutual permeation of the two heat exchange media can be prevented.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a heat exchanger for viscous fluid with poor fluidity, which can be used in the fields of chemical industry, petrochemical industry, food, medicine, papermaking, shipbuilding and the like. Background technique [0002] The heat exchange main parts of the traditional heat exchanger are stationary, relying on the heat exchange medium to flow in the heat exchanger, and the two mediums perform heat exchange on the wall of the heat exchanger. In order to improve the heat exchange effect, various methods are adopted. The shape of the heat exchange surface and the increase of the flow rate of the medium can increase the Re number to increase the heat transfer coefficient; while increasing the flow rate of the medium will increase the fluid resistance. Since the resistance and the flow rate are quadratic, it is impossible to design the heat exchanger Infinitely increase the flow rate, so the current h...

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Problems solved by technology

[0002] The heat exchange main parts of the traditional heat exchanger are stationary, relying on the heat exchange medium to flow in the heat exchanger, and the two mediums perform heat exchange on the wall of the heat exchanger. In order to improve the heat exchange effect, various methods are adopted. The shape of the heat exchange surface and the increase of the flow rate of the medium can increase the Re number to increase the heat transfer coefficient; while increasing the flow rate of the medium will increase the fluid resistance. Since the resistance and the flow rate are quadratic, it is impossible to design the heat exchanger Infinitely increase the flow rate, so the current heat exchanger design can only seek a balance between flow rate and resistance, that is, it is difficult to increase the heat transfer coefficient in a certain range. In order to meet the heat exchange of large flow and large heat transfer, The heat exchange requirements can only be met by increasing the heat exchange area. Therefore, the heat exchange area of ​​a large heat exchanger often reaches several thousand square meters.

Especially for highly viscous fluids, such as crude oil, heavy oil, residual oil, asphalt, pulp, etc., due to poor fluidity, the flow velocity is generally low, and the fluid is often in a laminar flow state on the boundary layer of the pipe wall, so it is difficult to improve the heat transfer intensity

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