Subsection rotating multi-head spring type self-cleaning reinforced heat exchanger

Abstract

A sectional rotation multi-head spring self-cleaning reinforced heat exchange device belongs to the technical field of self-cleaning reinforced heat exchange. The heat exchange device is characterizedin that each autogyration rotor comprises at least one rotation driving impeller and a spring assembly which can be driven by fluid in pipes to rotate around a soft shaft; the rotation driving impeller comprises a rotation shaft housing sheathed on the soft shaft, the spring assembly is connected with the rotation shaft housing into a whole and rotates around the soft shaft along with the rotationshaft housing; the spring assembly comprises at least two springs which clean and decontaminate the inner wall of the heat exchange tube and reinforces heat exchange in rotation; the rate value of th e equivalent diameter of the spring section of the spring assembly to the inner diameter of the heat exchange tube ranges from 1% to 15%; the rate value of the spring thread pitch of the spring assembly to the inner diameter of the heat exchange tube ranges from more than 0.4. The heat exchange device has the advantages of small flow resistance, good cleaning and decontaminating effect, marked reinforced convection heat transfer effect, long service life, etc.

Description

technical field [0001] The invention belongs to the technical field of self-cleaning enhanced heat exchange, in particular to a multi-head spring type self-cleaning enhanced heat exchange device installed in a heat exchange tube and rotating around a rotating shaft in sections under the action of fluid in the tube. Background technique [0002] Shell-and-tube heat exchangers are widely used in electric power, chemical industry, petroleum and other industrial fields. Most of the heat exchangers have fouling and scaling during operation, especially the condensers cooled by circulating water. And water coolers, and alkali evaporators for alkali production, etc. The fouling and fouling of the heat exchanger will reduce the heat transfer coefficient of the equipment, increase the energy consumption, and even cause the equipment to fail to operate normally due to pipe blockage; the fouling will also form corrosion under the scale, which shortens the service life of the equipment. ...

AI Technical Summary

Problems solved by technology

"Rotor-type self-cleaning enhanced heat transfer device" (China Patent No.: 200520127121.9) adopts a segmented axial fixation method, which disperses the force of the fluid on the rotating rotor, thereby basically eliminating the impact of the fluid on the long spiral bond / piece / Due to the large force of the rotor, it is more prone to failure problems, but there are still problems such as the increase of flow resistance is too large

Rotating coil spring descaling method, the long coil spring is hung at the inlet of the heat exchange tube through a rotatable structure, and the rotating structure is prone to failure due to the large force of the fluid on the long coil spring; the single-head coil spring The thread pitch is relatively small, and due to the consideration of strength, the diameter of the spring wire is relatively large, so the increase in flow resistance is also relatively large and significant, usually the resistance increases by 3-10 times

The reciprocating coil spring descaling method has limited anti-scaling and descaling effects, and sometimes it is even prone to clogging when the scaling is relatively serious; at the same time, the reciprocating coil spring is a single-head coil spring, and there are also problems similar to the above-mentioned large flow resistance. insufficient

The current online rubber ball cleaning technology is widely used in power plant condensers, but the rubber balls currently used are microporous and soft elastomer structures, and it is difficult to accurately control the wet diameter and specific gravity of the rubber balls during use. It is also easy to be attached by sludge, dirt and microorganisms, resulting in unsatisfactory cleaning and descaling effects, low ball collection rate, easy to block pipes and other problems; rubber ball cleaning has almost no effect of strengthening convective heat transfer

To sum up, the current cleaning and descaling technologies have certain deficiencies, such as relatively large flow resistance, poor cleaning and descaling effects, limited effect of enhanced heat transfer, and prone to failures, etc., which affect their popularization and application.

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