Shell and Tube Heat Exchanger

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. Categorized by Heat Transfer Principle

Shell-and-tube heat exchangers allow two fluids of different temperatures to flow in separated spaces between the walls. Heat exchange occurs between the fluids through the wall's conduction and convection at the wall surface.

2. Regenerative heat exchangers use a heat storage medium made of solid material 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 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 and gas condensers.

5. A double-effect heat exchanger that combines both surface-to-surface indirect heat exchange and direct water-to-water mixing heat exchange. Compared to surface-to-surface indirect heat exchange, it offers higher heat exchange efficiency; compared to direct water-to-water mixing heat exchange, it has greater stability and lower equipment noise.

III. Categorized by Usage

1. Heater - A heater is used to raise the temperature of a fluid to the required level, without causing a phase change in the fluid.

2. The preheater preheats the fluid, providing standardized 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 them to evaporate. They typically involve a phase change.

IV. Categorized by Structure

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