Product Details

I. Definition

Heat exchangers, also known as heat exchangers, are devices that transfer a portion of the heat from a hot fluid to a cold fluid. They play a crucial role in various industrial processes, including chemical, petrochemical, power, food, and many others. In chemical production, heat exchangers can serve as heaters, coolers, condensers, evaporators, and reboilers, with wide applications.

II. Classified by Heat Transfer Principle

1. Shell and Tube Heat Exchangers Shell and tube heat exchangers involve two fluids of different temperatures flowing in spaces separated by a wall. Heat transfer occurs between the fluids through conduction across the wall and convection at the wall surface.

2. Regenerative Heat Exchangers: These utilize a solid storage medium to transfer heat from a high-temperature fluid to a low-temperature fluid. The heat medium first heats the solid material to a certain temperature, and then the cold medium is heated through the solid material, achieving the goal of heat transfer.

3. Indirect Fluid Connection Heat Exchangers - These are heat exchangers that connect two surface heat exchangers via 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 heat exchanger.

4. Direct-contact heat exchangers, also known as mixed-flow heat exchangers, are devices where two fluids come into direct contact and mix for heat exchange. Examples include cooling towers, gas condensers, and more.

5. A double-effect heat exchanger that combines both surface-type indirect heat exchange between steam and water and direct mixed flow heat exchange between water. Compared to the surface-type indirect heat exchange, it offers higher heat exchange efficiency; compared to direct steam-water mixing heat exchange, it boasts higher stability and lower equipment noise.

III. Categorized by Application

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

2. Preheaters preheat the fluid, providing standard process parameters for operation.

3. Superheater - A superheater is used to heat the fluid (process gas or steam) to a superheated state.

4. Evaporator - An evaporator is used to heat fluids to temperatures above their boiling point, causing them to evaporate, typically involving a phase change.

IV. Categorized by Structure

Available in types: Floating Head Heat Exchangers, Fixed Tube Sheet Heat Exchangers, U-Type Tube Sheet Heat Exchangers, Plate Heat Exchangers, etc.