Heat exchanger form

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As heat transfer equipment, heat exchangers are widely used in areas with large energy consumption. With the rapid development of energy-saving technology, there are more and more types of heat exchangers. Heat exchangers suitable for different media, different working conditions, different temperatures, and different pressures. The structural types are also different. The specific classification of heat exchangers is as follows: 1. Heat exchangers can be divided into: 1. Surface heat exchanger: In a surface heat exchanger, two fluids with different temperatures flow in a space separated by a wall. Through the heat conduction of the wall and the convection of the fluid on the wall surface, heat is exchanged between the two fluids. Surface heat exchangers include shell and tube, sleeve and other types of heat exchangers. 2. Regenerative heat exchanger The regenerative heat exchanger transfers heat from high-temperature fluid to low-temperature fluid through a heat storage body made of solid matter. After the hot medium first reaches a certain temperature by heating the solid matter, the cold medium is heated by the solid matter to achieve the purpose of heat transfer. Regenerative heat exchangers include rotary type, valve switching type, etc. 3. Fluid connection indirect heat exchanger Fluid connection indirect heat exchanger is a heat exchanger that connects two surface heat exchangers by a heat carrier circulating in them. The heat carrier circulates between the high-temperature fluid heat exchanger and the low-temperature fluid. The high-temperature fluid receives heat and the low-temperature fluid heat exchanger releases heat to the low-temperature fluid. 4. Direct contact heat exchanger Direct contact heat exchanger is a device in which two fluids are in direct contact for heat exchange, such as cooling water tower, gas condenser, etc. 2. Heat exchangers are divided into: 1. Heater The heater heats the fluid to the necessary temperature, but the heated fluid does not undergo a phase change. 2. Preheater The preheater preheats the fluid and provides standard process parameters for process operations. 3. Superheater The superheater is used to heat the fluid (process gas or steam) to a superheated state. 4. Evaporator The evaporator is used to heat the fluid to a temperature above the boiling point, causing the fluid to evaporate, usually with a phase change. 3. According to the structure of the heat exchanger, it can be divided into: can be divided into: Floating head heat exchanger, fixed tube plate heat exchanger, U-shaped tube plate heat exchanger, plate heat exchanger, etc.