Product Details

I. Definition

Heat exchangers, also known as heat exchangers, are devices that transfer a portion of heat from a hot fluid to a cold fluid. They play a crucial role in chemical, petroleum, power, food, and many other industrial production processes. 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 separated spaces through the wall. Heat exchange occurs between the fluids through the wall's thermal conductivity and convection at the wall surface.

2. Regenerative Heat Exchangers: These exchangers utilize a solid heat 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 to achieve the heat transfer objective.

3. Indirect Fluid Connection Heat Exchangers - These are heat exchangers that connect two surface heat exchangers through a circulating heat carrier. 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.

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, etc.

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

III. Categorized by Application

1. The heater is designed to heat fluids to the required temperature without causing a phase change in the heated fluid.

2. The preheater preheats the fluid, providing standard process parameters for the operation.

3. Superheater - Used to superheat fluids (process gas or steam).

4. Evaporators are used to heat fluids to temperatures above their boiling points, causing the fluid to evaporate, typically involving a phase change.

Section 4: Categorized by Structure

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