Knowledge of Shell and Tube Heat Exchangers

Shell and tube heat exchangers consist of a shell, heat transfer tube bundle, tube plate, tube box, and other components. The shell is mostly cylindrical, the internal tube bundle, tube bundle ends fixed in the tube plate. Heat transfer of hot and cold two kinds of fluid: one in the tube flow, called the tube process fluid; the other outside the tube flow, called the shell process fluid.

Here is the content list:

• Structure type

• Tube arrangement

• New materials

• Excellent performance

Structure type

Shell and tube heat exchangers are made of the shell, heat transfer tube bundle, tube plate, folded plate tube box, and other components. The shell is mostly cylindrical, the internal tube bundle, tube bundle ends fixed in the tube plate. The heat transfer is carried out with both hot and cold fluids. One kind of flow in the tube is called the tube process fluid. Another flow outside the tube is called the shell process fluid. In order to improve the heat transfer coefficient of the fluid outside the tube, usually installed in the shell of a number of baffle plates. The baffle plate can increase the shell process fluid velocity, forcing the fluid to pass through the tube bundle several times laterally according to the specified distance, enhancing the degree of fluid turbulence.

Tube arrangement

Shell and tube heat exchanger heat transfer tubes in the tube plate can be arranged in equilateral triangles or squares. The equilateral triangular arrangement is more compact, the degree of fluid turbulence outside the tube is high, and the heat transfer coefficient is large. The square arrangement is easy to clean outside the tube, for easy scaling of the fluid. Each time the fluid through the tube bundle is called a tube process; each through the shell is called a shell process. In order to improve the speed of the fluid in the tube, can be set up in the tube box at both ends of the partition, all the tubes are divided into a number of groups.

New materials

The non-metallic material heat exchanger is often used in chemical production in the heat transfer of strongly corrosive fluids. Need to use ceramic, glass, PTFE, graphite, and other non-metallic materials to make shell and tube heat exchangers. Among them, silicon carbide as the main material of the ceramic heat exchanger is most often used.

Excellent performance

High efficiency and energy saving. Shell and tube heat exchanger has a greater advantage in heat transfer coefficient compared with other types. Shell and tube heat exchangers are made of all stainless steel and have a long service life of more than 20 years. This type of heat exchanger has a fast heat transfer rate, high-temperature resistance, and high-pressure resistance. Shell and tube heat exchanger is the most widely used product in the field of application, which can be widely used in thermoelectric power, factories, and mines, the petrochemical industry, urban central heating, food and medicine, energy and electronics, etc.

The above is some knowledge about shell and tube heat exchangers. If you have the idea of purchasing a heat exchanger, you can contact Shanghai Jiangxing Chemical Equipment Co.Led. We hope you can find the product of your choice.