Immersed type graphite heat exchanger

Abstract

The invention discloses an immersed type graphite heat exchanger. The immersed type graphite heat exchanger comprises a hollow graphite column, wherein the center of the hollow graphite column is provided with a first round through hole; annularly-distributed longitudinal heating holes are formed in the end surface of the hollow graphite column; transverse feeding holes are formed in an inner wallof the hollow graphite column; the top of the hollow graphite column is connected with an upper closure head in a sealing manner; the bottom of the hollow graphite column is connected with a lower closure head in a sealing manner; a second round through hole is formed in the center of the surface of the upper closure head; two crescent slots are formed in one side, close to the hollow graphite column, of the upper closure head; the inner parts of the crescent slots are funnel-shaped; a charging hole and a discharging hole are formed in one side, away from the hollow graphite column, of the crescent slots; crescent slots, a second round through hole, a charging hole and a discharging hole are also formed in the lower closure head; and the crescent slots formed in the upper closure head arecentrally symmetrical to the crescent slots formed in the lower closure head at 90 degrees. The immersed type graphite heat exchanger disclosed by the invention is high in structural strength; by adopting polytetrafluoroethylene with high corrosion resistance and high temperature resistance to immerse graphite, the service life of the graphite heat exchanger is prolonged; and a heating medium realizes countercurrent flow round trip in the graphite heat exchanger, so that the heat exchange efficiency is high.

Description

technical field [0001] The invention relates to the technical field of graphite heat exchangers, in particular to an immersed graphite heat exchanger. Background technique [0002] Graphite heat exchanger, that is, a heat exchanger whose heat transfer element is made of graphite. Graphite for manufacturing heat exchangers should be impermeable. Impregnated impermeable graphite and pressed impermeable graphite are commonly used. Graphite heat exchangers can be divided into three types: block hole type, tube shell type and plate type according to their structure. [0003] The immersion graphite heater is mainly used to immerse the fluid to exchange heat for the fluid. For example, the immersion graphite heat exchanger is immersed in the acid pool of the steel rolling industry to heat the acid. It can also be used as a built-in heating or cooling device for reactors and other equipment to improve heat transfer area. [0004] The existing heat exchanger used in the field of im...

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Problems solved by technology

[0004] The existing heat exchanger used in the field of immersion heat exchange is the traditional squirrel-cage graphite heat exchanger. The tube body is made of graphite-shaped tubes made of phenolic resin and graphite powder at high temperature and high pressure, and the head is impregnated with graphite. Pressed graphite tubes are more brittle than impregnated graphite, and the two materials together are prone to damage due to inconsistent stress, and the pressed graphite tube is cemented on the impregnated graphite, which affects heat transfer efficiency and corrosion resistance and has poor structural strength

[0005] At the same time, in the existing technology of immersion graphite heaters, during the heating process, the heating medium cannot form baffles, which greatly affects the heating efficiency.

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