Mechanical automatic descaling shell-and-tube heat exchanger and automatic descaling method

Abstract

The invention relates to a mechanical automatic descaling shell-and-tube heat exchanger and an automatic descaling method. The heat exchanger comprises a horizontally-arranged shell, two end ring tubes arranged in the shell and multiple heat exchange straight tubes arranged in the shell and connected with the two end ring tubes. The left end ring tube vertically arranged on one side in the shell communicates with a heat exchange water inlet in the upper portion of the shell, the bottom communicates with a heat exchange water outlet in the lower portion of the outer side, an upper piston plug is arranged in an upper tube of the left end ring tube, a lower piston plug is arranged in a lower tube, the upper piston plug and the lower piston plug are movably arranged in the left end ring tube and driven by a driving mechanism to move the positions, the right end ring tube is vertically arranged and located on the other side in the shell, and a stop piece is arranged in the middle of the top end of the right end ring tube. The multiple heat exchange straight tubes are horizontally arranged, the two ends of each heat exchange straight tube communicate with the left end ring tube and the right end ring tube correspondingly, a metal descaling ball is arranged in each heat exchange straight tube, and limiting pieces for preventing the metal descaling balls from entering the end ring tubes are installed at the two ends of the heat exchange straight tubes correspondingly.

Description

technical field [0001] The invention relates to the technical field of descaling equipment and methods for shell-and-tube heat exchangers, in particular to a mechanical automatic descaling shell-and-tube heat exchanger and an automatic descaling method. Background technique [0002] Dirt widely exists in various processes of industrial production, which will seriously hinder the normal operation of heat exchange equipment, resulting in huge waste of energy and astonishing economic losses. The formation of fouling on heat exchange equipment is an extremely complex physical and chemical compound process of energy, mass and momentum transfer. After the heat exchanger has been in operation for a period of time, dirt often accumulates on the heat transfer wall, which creates additional thermal resistance to heat transfer. The heat transfer coefficient K value decreases, which seriously affects the heat transfer efficiency. [0003] Heat exchange tubes are usually curved tubes. A...

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Problems solved by technology

[0002] Dirt widely exists in various processes of industrial production, which will seriously hinder the normal operation of heat exchange equipment, resulting in huge waste of energy and astonishing economic losses

The formation of fouling on heat exchange equipment is an extremely complex physical and chemical compound process of energy, mass and momentum transfer. After the heat exchanger has been in operation for a period of time, dirt often accumulates on the heat transfer wall, which creates additional thermal resistance to heat transfer. The heat transfer coefficient K value drops, which seriously affects the heat transfer efficiency

[0003] Heat exchange tubes are usually curved tubes. As the use time increases, the scale inside the heat exchange tubes will inevitably accumulate more and more, and its heat exchange efficiency will inevitably gradually decrease. Some heat exchange tubes with poor performance may even The reduction is very fast, and finally the existing heat exchange tubes not only have low heat exchange efficiency, but also have a short service life, and their cost performance is not high

The existing descaling equipment and methods are difficult to implement, and the economic cost is relatively high

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