Silicon carbide-graphite shell-and-tube heat exchanger

Abstract

The invention relates to a silicon carbide-graphite shell-and-tube heat exchanger. The silicon carbide-graphite shell-and-tube heat exchanger comprises a jacket and a graphite lining, wherein the jacket comprises an upper end socket, a middle sleeve and a lower end socket which are sequentially connected from top to bottom; and the graphite lining is matched with the jacket to jointly form a heatexchange channel, the graphite lining comprises an upper tube plate arranged between the upper end socket and the middle sleeve, a lower tube plate arranged between the lower end socket and the middlesleeve, and silicon carbide heat exchange tubes arranged between the upper tube plate and the lower tube plate side by side, and the silicon carbide heat exchange tubes are connected with the upper tube plate and the lower tube plate in a static sealing mode. The silicon carbide-graphite shell-and-tube heat exchanger has the advantages that the silicon carbide heat exchange tubes are adopted, silicon carbide has the characteristics of stable chemical properties, high heat conductivity coefficient, small thermal expansion coefficient and good abrasion resistance, and thus the heat exchange tubes have good resistance to high temperature and high pressure and are suitable for conducting heat exchange through high-temperature and high-pressure media.

Description

Technical field [0001] The invention relates to a heat exchanger, in particular to a silicon carbide graphite tube heat exchanger. Background technique [0002] Graphite heat exchanger has excellent corrosion resistance and heat transfer performance. It can be used in the heat transfer process of corrosive media and can give full play to the superiority of graphite equipment. In order to save stainless steel and precious non-ferrous metal materials, graphite heat exchangers are widely used to treat corrosive media such as hydrochloric acid, sulfuric acid, acetic acid and phosphoric acid. [0003] The tubular graphite heat exchanger has a simple structure, high utilization rate of graphite material, and can be made into a device with a larger heat transfer area, and the cost per unit heat transfer area is lower than other structural forms. [0004] For example, in the patent CN104180688A, a tubular graphite heat exchanger is mentioned. The inner graphite cylinder is formed by connect...

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Problems solved by technology

[0005] At present, the staff found in the process of using the above-mentioned heat exchange tubes that the ordinary heat exchange tubes used in the heat exchange tubes do not have the characteristics of high temperature resistance and high pressure. Therefore, for some high temperature, High pressure medium is not applicable

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