An 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 an anti-corrosion high temperature ship heat exchanger. Background technique [0002] In order to meet the use and operation requirements, the ship power system needs to use seawater to cool high-temperature hot water, high-temperature steam and other media. Safety and reliability have always been a difficult problem in such equipment for exchanging heat between seawater and high-temperature media. Actual operating experience shows that this type of high temperature heat exchanger mainly has the following problems: [0003] The tube side and shell side of the ship’s high-temperature heat exchanger are made of BFe30-1-1 iron-nickel copper, and the cooling water is seawater. After long-term operation, the seawater side tube wall of the high-temperature heat exchanger inlet section is severely corroded, and even local areas Corrosion and perforation; high-temper...

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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