A spiral plug flow channel plate heat exchanger
A technology of plate heat exchangers and flow channels, applied in indirect heat exchangers, heat exchanger types, heat exchange equipment, etc., can solve the problems of low utilization rate of heat exchange area, complex fins, large resistance loss, etc., to achieve The effect of increasing the utilization rate of effective heat transfer area, improving the heat transfer capacity of the spaced fluid, and reducing the thermal resistance of heat conduction
Active Publication Date: 2019-08-23
XI AN JIAOTONG UNIV
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Problems solved by technology
There are many problems in the current traditional plate heat exchange equipment, such as: ①The cold and hot fluid channels arranged in rows have one-dimensional heat conduction, and the utilization rate of the heat exchange area is low; ②Complicated fins disturb the flow to enhance heat transfer, but the resistance loss is too large; ③The brazing joint is welded with dissimilar materials, and the thermal expansion stress under high temperature conditions makes the material prone to creep, which in turn blocks some channels, reducing heat transfer efficiency and safety
Method used
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[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] The invention includes a heat exchange core body, an inlet guide section, an outlet guide section, a hot fluid inlet, a hot fluid outlet, a cold fluid inlet and a cold fluid outlet. The adjacent cold and hot fluid channels in the heat exchange core take the center horizontal line of the distance as the axis, and extend spirally and staggered. , The structure of the outlet guide section is a vertical staggered arrangement of direct-flow guide plates and angled guide plates to ensure that the hot fluid goes straight in and out, and the cold fluid enters and exits sideways. One side of the guide section is connected to the heat exchange core. One side is connected to the inlet and outlet of the hot and cold fluid; the inlet and outlet of the hot and cold fluid are of a transitional structure, which can effectively reduce the volume of the...
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The invention relates to a spiral plug-flow channel plate type heat exchanger. The spiral plug-flow channel plate type heat exchanger is composed of a heat exchanging core, an inlet flow guiding section, an outlet flow guiding section, a hot fluid inlet and outlet and a cold fluid inlet and outlet. The heat exchanging core of the heat exchanger adopts a flowing channel where heat exchanging is conducted through spiral parallel countercurrent flow, and thus more sufficient heat exchanging of fluid in the heat exchanger is facilitated. The inlet flow guiding section and the outlet flow guiding section adopt direct in-out and side in-out staggered structures, and thus more even distribution of the fluid in the heat exchanger is facilitated. The cold fluid inlet and outlet and the hot fluid inlet and outlet adopt a square-round transition structure, and thus a more compact structure of the heat exchanger is facilitated. The spiral plug-flow channel plate type heat exchanger can achieve solid two-dimensional heat conduction, the heat conduction resistance is reduced, the heat transmission capacity between the fluid on the two sides is increased, the heat transmission area of the heat exchanger is enlarged, the compactness of the heat exchanger is improved, the comprehensive efficiency of the heat exchanger is improved, deformation caused by concentrated distribution of thermal stress is improved, the safety property of the heat exchanger is improved, and the service life is prolonged.
Description
technical field [0001] The invention relates to a plate heat exchanger used in liquefied natural gas, petroleum, chemical industry, refrigeration, nuclear energy and other industries, in particular to a spiral channel plate heat exchanger. Background technique [0002] Heat exchanger is an important heat exchange equipment widely used in petrochemical, energy, metallurgy, refrigeration, nuclear energy and other industrial fields. Due to its mature manufacturing process, compact structure, and high heat transfer efficiency, plate heat exchangers occupy a large proportion of heat exchange equipment. In a traditional plate heat exchanger, two layers of fluid, cold and hot, exchange heat through the wall of the heat exchange plate. Increase the degree of fluid turbulence to achieve the purpose of heat transfer enhancement. [0003] The traditional plate heat exchanger consists of a combination of base plate and fins to form a fluid channel. It is mainly used in heat exchange e...
Claims
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IPC IPC(8): F28D9/00F28F3/08
Inventor 王秋旺李雄辉马挺曾敏褚雯霄
Owner XI AN JIAOTONG UNIV