Anti-corrosion ship high-temperature heat exchanger

Abstract

The invention discloses an anti-corrosion ship high-temperature heat exchanger, and relates to the field of ship heat exchange devices. A shell, a center pipe and a heat exchange pipe are included. The side walls of the two ends of the shell are provided with a shell side inlet and a shell side outlet correspondingly, the shell is in a cylinder shape, and the inner diameters of the shell are gradually increased from the shell side outlet to the shell side inlet. The center pipe is fixedly arranged in the shell, and the outer diameters of the center pipe are gradually increased from the shell side outlet to the shell side inlet. The heat exchange pipe surrounds the center pipe in the shell, a pipe side inlet and a pipe side outlet are formed in the two ends of the heat exchange pipe correspondingly, and the pipe diameters of the heat exchange pipe are gradually reduced from the pipe side inlet to the pipe side outlet. By means of the anti-corrosion ship high-temperature heat exchanger,the situation that seawater in the shell boils at the high-temperature medium inlet position, and consequently cavitation corroding is generated to the outer wall of the heat exchange pipe can be prevented; and safety and reliability of the heat exchanger can be better improved.

Description

Technical field [0001] The invention relates to the technical field of ship heat exchange devices, in particular to a corrosion-resistant high temperature heat exchanger for ships. Background technique [0002] In order to meet the requirements of use and operation, marine power systems need to use sea water to cool media such as high-temperature hot water and high-temperature steam. In such equipment for heat exchange between seawater and high-temperature medium, safety and reliability have always been a difficult problem to solve. Actual operating experience shows that this type of high temperature heat exchanger mainly has the following problems: [0003] The material of the tube side and shell side of the ship's high-temperature heat exchanger is BFe30-1-1 iron white copper, and the cooling water is seawater. After long-term operation, the seawater side pipe wall of the inlet section of the high-temperature heat exchanger is corroded seriously, even in some areas. Corrosion p...

AI Technical Summary

Problems solved by technology

However, there will be a problem of shedding when spraying organic materials, and the method of spraying organic materials and increasing the thickness of the tube wall will greatly reduce the heat exchange efficiency between the thermal measurement medium and seawater, which will increase the volume and weight of the device on the one hand, and on the other hand It will also cause the high temperature section of the heat exchange tube to move backward

Therefore, this method of reducing the temperature of the outer wall surface of the heat exchange tube cannot fundamentally solve the serious corrosion problem of the marine high-temperature heat exchanger under the combined action of high temperature and seawater, and cannot effectively improve the safety and reliability of the device.

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