What is the difference between a column-tube heat exchanger and a shell tube heat exchanger? Different usages

　　Pharmaceutical Network Technical Article: In medicine and other fields, heat exchangers are common equipment Recently, there are users want to buy a heat exchanger, the result in the column tube heat exchanger and shell tube heat exchanger between hesitating, Do not know the difference between the two So what's the difference between the two heat exchangers? In this regard, a heat exchanger manufacturer technical staff made a brief introduction
Different use From the structure of the two, the column tube heat exchanger and shell tube heat exchanger are basically exactly the same in structure, but the use of different ways
Among them, the column tube heat exchanger is the material liquid walking pipe, that is, the tube inside; The tube shell heat exchanger is the opposite
Different effectaccording introduction, the tube heat exchanger tube bundle connected to the tube plate, pipe plate is welded at both ends of the shell, and on it is connected with a top cover, the top cover and the shell equipped with fluid import and export to take over A series of bezels perpendicular to the tube bundle are usually installed outside the tube
At the same time, the connection between the tube and the tube plate to the housing is rigid, and the outside of the tube is two different temperature fluids Therefore, when the temperature difference between the pipe wall and the shell wall is large, due to the different thermal expansion of the two, a great temperature difference stress is produced, so that the tube twists or tubes loose from the tube plate, or even destroy the heat exchanger
The tube shell heat exchanger consists of the shell, the heat transfer tube beam, the tube plate, the refractory plate (bezel) and the tube box and other components The shell is mostly cylindrical, the interior is equipped with a tube bundle, and the ends of the tube bundle are fixed on the tube plate
Heat-changing hot and cold two kinds of fluid, one in the tube flow, called the tube flow, the other flow outside the tube, is the shell flow In order to improve the heat transfer coefficient of the tube outflow body, several bezels are usually installed in the housing The bezel increases the velocity of the shell flow, forcing the fluid to pass through the tube beam several times according to the prescribed distance, and enhancing the fluid turbulence flow
Cleaning ease is different It is understood that the structure of the column tube heat exchanger is relatively simple, compact, cheap, but outside the tube can not be mechanical cleaning
The tube shell heat exchange tube can be arranged in an equilateral triangle or square on the tube board The equilateral triangle arrangement is more compact, the out-of-tube fluid turbulence degree is high, the heat transfer coefficient is large, and the square arrangement is convenient for cleaning outside the tube, suitable for the fluid which is prone to fouling
The author learned that, at present, there are many column tube heat exchanger manufacturers to improve the conventional structure, developed a two-tube column tube heat exchanger can be applied to the health level requirements of higher conditions, its unique design makes the heat exchanger easy to completely empty and maintain a clean state, the two-tube plate structure to avoid the risk of conventional heat exchanger prone to cross-contamination And the integrated structural design, without any sealing elements, can be maintenance-free
Conclusion No matter what kind of heat exchanger, its role is different, in the corresponding field is also useful For heat exchanger manufacturers, what needs to be done is to keep ahead, to user demand as the center, seize the industry trends, keep up with the policy direction, innovation and upgrade, improve equipment, help users better development For example, driven by the concept of energy-saving efficiency, heat exchanger equipment manufacturers need to move towards more energy-saving, green development, to help pharmaceutical companies reduce costs, and let enterprises meet the needs of sustainable development In addition, in the current heat exchanger market competition in the background, manufacturers also need to consider these aspects to improve competitiveness.