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Fixed tube plate heat exchanger

Fixed tube plate heat exchanger

In the fixed tube plate heat exchanger, fluids of different temperatures flow through the tube side and shell side, and heat exchange is completed through heat exchange. When the temperature difference between the two fluids is large, in order to avoid higher temperature difference stress, a compensation ring (expansion joint) is usually added at an appropriate position on the shell side. When the thermal expansion of the shell and the tube bundle is different, the compensation ring undergoes slow elastic deformation to compensate for the thermal expansion caused by temperature difference stress.

Composition and characteristics of fixed tube plate heat exchanger

Composition of fixed tube plate heat exchanger

 The fixed tube plate heat exchanger is composed of tube boxes, shells, tube sheets, tubes and other components. It has a compact structure, many rows of tubes, a large area under the same diameter, and is relatively simple to manufacture.

The structural feature of the fixed tube plate heat exchanger is that there is a tube bundle in the shell. The tubes are fixed on the tube plate at both ends of the tube bundle by welding or expansion joints. The tube plates at both ends are directly welded to the shell. The inlet and outlet pipes are directly welded to the shell. The outer circumference of the tube plate and the head flange are fastened with bolts. The inlet and outlet pipes of the tube side are directly welded to the head. A number of heat exchanger pipes are set in the tube bundle according to the length of the heat exchange tubes. baffle plate. The tube passes of this heat exchanger can be divided into any number of passes using partitions.

Characteristics of fixed tube plate heat exchanger

 The fixed tube plate heat exchanger has a simple structure, low manufacturing cost, and easy cleaning of the tube side. The tube side can be divided into multiple passes, and the shell side can also be divided into two passes. It has a wide range of specifications, so it is widely used in engineering. It is difficult to clean the shell side and should not be used for dirty or corrosive media. When the difference in expansion is large, an expansion joint can be installed on the shell to reduce the thermal stress caused by the temperature difference between the tube and the shell.

The characteristics of fixed tube plate heat exchanger are:

1. The bypass seepage is small

2. Forgings are used less and cost is low;

3. No internal leakage;

4. The heat transfer area is 20%~30% larger than that of floating head heat exchanger.

Fixed tube plate heat exchanger application scope:

A kind of process equipment commonly used in petroleum, chemical industry, petrochemical industry, metallurgy, electric power, light industry, food and other industries. In oil refining and chemical plants, heat exchangers account for about 40% of the total equipment and 30%-45% of the total investment. In recent years, with the development of energy-saving technology, the application fields have continued to expand, and the use of heat exchangers for high- and low-temperature heat energy recovery has brought significant economic benefits.

Materials for fixed tube plate heat exchangers

The shell material is carbon steel or stainless steel, and the heat exchange tube material is copper. Customized fixed tube plate heat exchangers with special materials, heat exchange areas and working pressure levels.

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