Coaxial double-pipe heat exchanger with front filtering device

Abstract

The invention discloses a coaxial double-pipe heat exchanger with a front filtering device. The coaxial double-pipe heat exchanger comprises the front filtering device and a coaxial double-pipe heat exchange device. The front filtering device comprises a filtering shell and a filtering element, a medium feeding pipe is connected to a medium inlet of the filtering shell, a medium discharging pipe is connected to a medium outlet of the filtering shell, and a sewage draining port is formed in the bottom of the filtering shell. The coaxial double-pipe heat exchange device comprises a base, a spiral outer unthreaded pipe and a spiral special-shaped heat transfer pipe, the spiral special-shaped heat transfer pipe is sleeved with the spiral outer unthreaded pipe, the spiral outer unthreaded pipe and the spiral special-shaped heat transfer pipe are arranged coaxially, the spiral outer unthreaded pipe is fixed to the base, the two ends of the spiral outer unthreaded pipe are both connected with connecting pipes, connecting holes are formed in the middles of the connecting pipes, outer pipe threaded connectors are connected to the connecting holes, inner pipe threaded connectors are connected to the two ends of the spiral special-shaped heat transfer pipe correspondingly, and the inner pipe threaded connectors are connected with the connecting pipes in a sealed mode. According to the coaxial double-pipe heat exchanger, front filtering of media can be achieved, the material blocking situation and the under-deposit corrosion phenomenon are prevented, the heat transfer area is increased, the heat transfer coefficient is increased, the corrosion resistance is high, and the service life is long.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, and in particular relates to a coaxial casing heat exchanger with a pre-filter device. Background technique [0002] Heat exchanger is one of the main process equipment in oil refining, chemical industry, metallurgy, electric power and other industries. At present, the heat recovery rate in developed industrial countries has reached 96%, and heat exchange equipment accounts for about 35% to 40% of all process equipment investment in petroleum refineries, among which shell-and-tube heat exchangers still occupy an absolute advantage, about 70%. At present, in my country's petrochemical industry, the investment in heat exchange equipment accounts for more than 30% of the equipment investment. Among the heat exchange equipment, the shell-and-tube heat exchanger is the most used, and more than 80% of the shell-and-tube heat exchanger The arched baffle light pipe structure and light pipe are s...

AI Technical Summary

Problems solved by technology

[0004] At the same time, whether it is a traditional shell-and-tube heat exchanger or a new type of high-efficiency heat exchanger, there is material clogging and corrosion under the scale. It is difficult to clean and maintain later, which seriously affects product quality and production efficiency.

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