U Tube Heat Exchanger

Introduction

U Tube Heat Exchanger is one of our company's best-selling products. We have modern equipment and management to ensure product quality. We have the ability to produce products that meet ASME, PED, CE, JIS, IBR, MOM, DOSH, GB and other standards. containerU-tube heat exchangers are most typically used as steam generators in nuclear power plants. They are used to boil recycled water from a surface condenser into steam to drive a turbine to generate power. Most shell and tube heat exchangers are 1, 2 or 4 pass designs on the tube side. This refers to the number of times the liquid in the tubes has passed through the liquid in the shell. In a single pass heat exchanger, the fluid enters one end of each tube and leaves the other.

Structure and Main Components

1. Shell: A cylindrical container housing the tube bundle and shell-side fluid.

2. U-tube Bundle: The core heat exchange element, composed of U-shaped metal tubes (carbon steel, stainless steel, alloy steel, copper alloy, etc.) arranged in a regular pattern.

3. Tube Sheet: A single thick plate used to secure both ends of all the U-tubes.

4. Tube Box (Head Cover): Mounted on the tube sheet, distributing and collecting the tube-side fluid.

5. Baffle Plate: Installed on the shell side, supporting the tube bundle, guiding the shell-side fluid flow, and enhancing turbulence and heat transfer. A common type is the arc-shaped baffle plate.

6. Pass Divider (Optional): Installed inside the tube box, dividing the tube side into 2-pass, 4-pass, etc., to increase the tube-side flow velocity and heat transfer coefficient.

Product Features

1. Excellent Thermal Compensation Capability: The U-tube structure allows for free expansion and contraction, effectively handling thermal expansion and contraction, reducing thermal stress, and lowering the risk of tube rupture and leakage. It is suitable for applications with large temperature differences.

2. Easy Maintenance: The tube bundle can be pulled out of the shell, facilitating cleaning, inspection, and maintenance of both the inside and outside of the tubes. This is particularly advantageous for applications requiring regular maintenance, such as those in the chemical and food industries.

3. Compact Structure: The U-tube arrangement results in a relatively small heat exchanger size and footprint, enabling efficient heat transfer within a limited space.

4. High Pressure Resistance: Typically employing a robust structural design, it can withstand high pressures, making it suitable for high-pressure applications such as those in the petrochemical and power industries.

Working principle

One fluid flows through the tubes and exits the heat exchanger; the other fluid circulates outside the tubes inside the cylindrical shell. Heat is transferred from one fluid to another through the pipe wall. The flow path of the fluid within the cylindrical shell is directed through the vessel by baffles, which has the effect of increasing the flow path and contact time for the heat transfer exchange of the fluid.

Application Areas

1. Petrochemical Industry: High-pressure heat exchange stages in hydrocracking, hydrorefining, and reforming units; inlet/outlet heat exchangers for reactors.

2. Power Industry: High-pressure feedwater heaters and condensers in power plants.

3. Refrigeration and HVAC: Used as evaporators and condensers.

4. Pharmaceutical and Food Industries: Applications requiring high hygiene standards or handling high-viscosity fluids (can be achieved through the shell side).

5. Other Industries: Any heat transfer process involving high thermal stress or requiring high-pressure design.

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