The category division of double pipe heat exchanger factories

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Heat exchangers suitable for different media, working conditions, temperatures and pressures have different structural types. The specific classification of heat exchangers is as follows:

I. Classification by Heat transfer principle

1. Interwall heat exchanger

In an interwall heat exchanger, two fluids with different temperatures flow in separate Spaces separated by a wall. Heat exchange occurs between the two fluids through heat conduction via the wall and convection on the wall surface. Interwall heat exchangers include shell and tube type, double-pipe type and other types of heat exchangers. The interwall heat exchanger is currently the most widely used heat exchanger.

2. Regenerative heat exchanger

A regenerative heat exchanger transfers heat from a high-temperature fluid to a low-temperature fluid through a heat storage medium composed of solid substances. The hot medium first heats the solid substances to a certain temperature, and then the cold medium passes through the solid substances to be heated, achieving the purpose of heat transfer. Regenerative heat exchangers include rotary type, valve-switching type, etc.

3. Fluid connection indirect heat exchanger

The fluid connection indirect heat exchanger is a type of heat exchanger that connects two surface heat exchangers through a heat carrier circulating within them. The heat carrier circulates between the high-temperature fluid heat exchanger and the low-temperature fluid, absorbing heat from the high-temperature fluid and releasing it to the low-temperature fluid in the low-temperature fluid heat exchanger.

4. Direct contact heat exchanger

Also known as a hybrid heat exchanger, this type of heat exchanger is a device in which two fluids come into direct contact and mix with each other for heat exchange. For example, it is used in cooling towers, gas condensers, etc.

5. Compound heat exchanger

A device that combines both indirect heat exchange methods such as steam-water surface heat exchange and direct water-water mixed flow heat exchange. Compared with the steam-water surface indirect heat exchange, it has a higher heat exchange efficiency. Compared with the direct mixing and heat exchange of soda water, it has higher stability and lower noise of the unit.

Ii. Classification by use

"Heater"

A heater is used to heat a fluid to the necessary temperature without causing a phase change in the heated fluid.

2. Preheater

The preheater preheats the fluid to provide standard process parameters for the operation of the process.

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. Generally, there is a phase change.

Iii. Classification by Structure

It can be classified as: floating head heat exchangers, fixed tube sheet heat exchangers, U-tube sheet heat exchangers, plate heat exchangers, etc.

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