Scale scale self-falling type cleaning-free shell-and-tube heat exchanger

Abstract

The invention discloses a scale self-falling-off type cleaning-free shell-and-tube heat exchanger, and belongs to the field of heat exchangers. In the scheme, when the temperature of liquid flowing in a heat exchange tube is gradually increased, scale is separated out and adheres to a capture fiber cluster, and along with further growth of the scale, the scale is separated out and adheres to the capture fiber cluster; the scale block can pull apart the capture fiber cluster and fall off, the residual part of the capture fiber cluster returns to the original shape, along with the increase of the scale in the metal bag net and the increase of the pressure on the metal bag net, the whole metal bag net is torn along the joint of the metal bag net and the fixing ring, the metal bag net losing the constraint of the fixing ring contracts, and the falling scale is wrapped together; the water scale falls into the liquid inlet cavity and falls to the bottom of the liquid inlet cavity, so that the heat exchange pipe is not prone to being blocked by the falling water scale, normal heat exchange work of the heat exchange pipe is not prone to being influenced, and the falling water scale is wrapped by the fixing ring, not prone to being scattered again and not prone to influencing the water quality of heat exchange water.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a scale self-shedding type shell-and-tube heat exchanger without cleaning. Background technique [0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used . [0003] Shell-and-tube heat exchangers are mainly composed of shells, tube bundles, tube sheets, and heads. The shells are mostly circular, and parallel tube bundles or spiral tubes are installed inside. board. Two fluids that exchange heat in the shell-and-tube heat exchanger, one flows in the tube, and its stroke is called the tube side; the other flows outside the tube, and its stroke is called the s...

AI Technical Summary

Problems solved by technology

[0004] The heat exchange liquid used in heat exchangers is usually liquid water, and it is difficult for these liquid water to reach the level of distilled water. During normal use, when liquid water develops from low temperature phase to high temperature, a large amount of scale is easily precipitated and adhered to the tube bundle. On the inner wall, it affects the heat conduction efficiency of the tube bundle, which in turn affects the working efficiency of the heat exchanger, and with the further increase of scale, it may even cause an explosion accident of the heat exchanger

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