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 such as chemical, petroleum, 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 separate spaces separated by a wall. Heat exchange occurs between the fluids through the wall's thermal conductivity and convection at the wall surface.

2. Regenerative Heat Exchangers: These heat exchangers 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 transfer medium circulating within them. The heat transfer medium circulates between the high-temperature fluid heat exchanger and the low-temperature fluid, absorbing heat in 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 and gas condensers.

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

Section 3: Categorized by Application

Heater: A heater is used to raise the temperature of a fluid to the required level without causing any phase change in the 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 them to evaporate, typically involving a phase change.

Four, Categorized by Structure

Available options include: floating head heat exchangers, fixed tube sheet heat exchangers, U-tube heat exchangers, plate heat exchangers, etc.