Double-effect and heat exchange system that can reduce the impact of cold and heat

Abstract

The invention discloses a double-effect heat exchange system capable of reducing cold and heat shocks, which includes a silicon carbide heat exchanger, a heat exchange part and a heat source station. The silicon carbide heat exchanger includes a tube body, an end sealing device, a silicon carbide tube And the tube cover, the silicon carbide tube is arranged in the tube body, the silicon carbide tube is connected with the tube cover through the end sealing device, and the heat exchange part is connected with the silicon carbide heat exchanger and the heat source station. The invention has the beneficial effects of reducing thermal shock, high structural strength, good anti-corrosion effect, timely monitoring of medium leakage, convenient maintenance and replacement, good sealing effect, reduced workload and long service life.

Description

technical field [0001] The invention relates to the field of chemical machinery and equipment, and more specifically relates to a double-effect heat exchange system capable of reducing cold and heat shocks. Background technique [0002] Silicon carbide heat exchanger is a new type of heat exchanger using silicon carbide ceramic material as heat transfer medium. Because silicon carbide ceramics have excellent characteristics such as corrosion resistance, high temperature resistance, high thermal conductivity, high hardness, and wear resistance. It has excellent performance of high temperature resistance and thermal shock resistance. It is air-cooled from 1000 ℃ to room temperature, and no cracks will appear after repeated more than 50 times. The thermal conductivity is equal to that of stainless steel. It has good corrosion resistance in oxidizing and acidic media. Therefore, the core technology of silicon carbide heat exchangers lies in how to solve the problems of anti-cor...

AI Technical Summary

Problems solved by technology

Among them, the enamel process on the metal tube sheet is more complicated. If the treatment is not good, the enamel burst will cause the entire tube sheet to be scrapped; the price of the PTFE tube sheet is relatively high, and the strength of the PTFE tube sheet decreases after being heated and pressurized, which is easy to cause sealing problem

[0003] In the prior art, because the heat exchanger is used alternately between cold and hot, it is easy to cause the aging of the sealing element and cause the leakage of the medium. At the same time, the inside of the heat exchanger tube is coated with enamel, and the temperature is too high or the temperature is too high if it is not used for a long time. Low will cause impact on the enamel coating, which will easily lead to peeling off of the enamel coating and affect the service life

[0004] In addition, in the existing technology, a fixed compression method is usually used for the compression of the seal on the silicon carbide tube. However, with repeated heating and cooling, the sealing material will age and form gaps, resulting in leakage of the medium.

At the same time, because the medium as a whole is sealed, even if a leak occurs, it cannot be found in time.

[0005] Moreover, since the leakage only occurs on individual silicon carbide tubes, in the prior art, because the two tube sheets are bonded together, after the leakage occurs, after disassembly, it will be found that all the ends of the silicon carbide tubes have media, and it is impossible to know which one. The specific SiC tube leaked and all the SiC end seals needed to be replaced, a lot of work

Images