Self-rotating and cleaning device of dirt in heat transfer tube

Abstract

The invention discloses a self-rotating and cleaning device of dirt in a heat transfer tube, comprising a spiral hairbrush arranged in the heat transfer tube of a heat exchange tube and can moves in a straight line in the tube, wherein the spiral hairbrush is arranged on a traction shaft by a connecting rope; one end of the connecting rope is connected with the spiral hairbrush; and the other end of the connecting rope passes through a pipe inlet of the heat transfer tube of the heat exchanger and is fixed on the traction shaft which is connected with a drive device through a driving mechanism. Scale attached to the wall of the heat transfer tube of the heat exchanger is removed under the action of friction and cleaning of the spiral hairbrush. In addition, when the self-rotating and cleaning device is free from cleaning, the spiral hairbrush has little influence on the fluid resistance and the flow change of the fluid can be correspondingly reduced by adopting a structure that the spiral hairbrush can be clamped on a dual-layer metal mesh away from an outlet of the heat transfer tube at a certain distance. In addition, the connecting rope is free from being stressed when not being for cleaning, so that the durability of the self-rotating and cleaning device can be greatly improved, the self-rotating and cleaning device can meet the requirement for operating for a long term and can be applied on general heat exchangers with the flow speed of the fluid being greater than 1m/s on a large scale.

Description

technical field [0001] The invention relates to a cleaning device inside a heat transfer tube, in particular to an automatic descaling device for a tube-and-tube heat exchanger, and belongs to the transformation technology of a self-cleaning device for dirt inside a heat transfer tube. Background technique [0002] Chinese Patent Publication Nos. CN101561232A and CN101216260A disclose two kinds of sewage heat exchangers. A brush driven by a mechanical guide rail is installed in the heat exchanger housing to clean and remove deposits adhering to the pipe wall. However, the heat exchangers in the above patents need to be specially made, and the size and clearance of the heat exchangers need to be large; and there are three problems as follows: first, the brushes are installed in the shell side of the heat exchangers, making it difficult to replace the brushes and inconvenient to maintain . Secondly, the brush is installed in the flow field, which increases the water flow resi...

AI Technical Summary

Problems solved by technology

However, the heat exchangers in the above patents need to be specially made, and the size and clearance of the heat exchangers need to be relatively large; and there are three problems as follows: first, the brushes are installed in the shell side of the heat exchangers, making it difficult to replace the brushes and inconvenient to maintain

Secondly, the brush is installed in the flow field, and the water flow resistance increases, which affects the water flow; third, the transmission is hard-connected, and the equipment cost is high

The above three reasons make it difficult to promote the use of most projects in use

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