Integral sealed silicon carbide heat exchanger

Abstract

The invention belongs to the field of silicon carbide heat exchangers, and particularly relates to an integrally-sealed silicon carbide heat exchanger which comprises a shell and a heat exchange core, wherein the heat exchange core is in an integral structure made from silicon carbide; the heat exchange core is provided with a plurality of rows of transverse hot side flow channel holes and cold side flow channel holes which are alternately arranged in a staggered mode; a high-temperature-resistant sealing element is installed between each rectangular blind plate of the shell around the side surface of the heat exchange core and an outwardly convex external edge of the heat exchange core; a cavity is formed between the external edge of the heat exchange core and the rectangular blind plate; hot side cavities on both sides of the hot side flow channel holes are communicated with a hot side inlet and a hot side outlet through hot side channels and form a hot side flow channel with the hot side flow channel holes; and cold side cavities on both sides of the cold side flow channel holes are communicated with a cold side inlet and a cold side outlet through cold side channels and form a cold side flow channel with the cold side flow channel holes. The integrally-sealed silicon carbide heat exchanger has the advantages of simple technique, lower cost and high cost performance, and can enhance the design pressure to 1.6 MPa and enhance the design temperature to 300 DEG C, thereby having wide application range.

Description

technical field [0001] The invention relates to an integrally sealed silicon carbide heat exchanger, which belongs to the field of silicon carbide heat exchangers. Background technique [0002] Up to now, the heat exchangers used in corrosion conditions have undergone a process of renewal, from the initial plate stainless steel heat exchangers to titanium and tantalum heat exchangers, and then glass tube heat exchangers, enamel tubes, etc. Heat exchangers, as well as graphite heat exchangers, this front-to-back process is also the process of heat transfer technology revolution in industrial corrosion conditions. The above technologies have been used in industry for many years, and the corrosion resistance has been gradually improved. Although the above technologies have solved the heat transfer problems of most corrosion conditions, there are still a few strong corrosion conditions that currently have no effective heat transfer solutions. . In response to this situation, p...

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Problems solved by technology

This change is not easy, but a more difficult change will be urgently needed and a milestone, because even if it is built according to the methods of the above two patents, the corrosion problem is solved (due to the enamel layer bursting porcelain problem will affect the service life), However, since the existing silicon carbide heat exchangers are all silicon carbide tube-and-tube heat exchangers, the two ends of the silicon carbide tubes need to be sealed with polytetrafluoroethylene during production. This sealing method has limitations and bears Low pressure and not suitable for high temperature above 200°C, so usually the design pressure is less than 0.8 MPa, and the design temperature is less than 200°C

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