Tubular heat exchanger

Product Overview

A tubular heat exchanger is mainly composed of a shell, a plate, heat exchange tubes, a head, and a baffle plate. It can be made of ordinary carbon steel or stainless steel respectively. During heat exchange, a fluid enters from the connecting pipe of the head, flows through the pipe, and exits from the outlet pipe at the other end of the head, which is called the pipe side; Another type of fluid enters through the connecting pipe of the shell and flows out from another connecting pipe on the shell, which is called the shell side.

Fixed tube plate heat exchanger

       Its structure is relatively simple, compact, and cost-effective, but the outside of the pipe cannot be mechanically cleaned. This type of heat exchanger tube bundle is connected to a tube plate, which is welded to both ends of the shell and connected to a top cover. The top cover and shell are equipped with fluid inlet and outlet connections. Usually, a series of baffles perpendicular to the tube bundle are installed outside the tube. At the same time, the connection between the steel pipe and the pipe plate and the outer shell is rigid, while the inside and outside of the pipe are two different temperature fluids. Therefore, when the temperature difference between the tube wall and the shell wall is large, due to the different thermal expansion of the two, a large temperature difference stress is generated, which can cause the tube to twist or loosen from the tube plate, and even damage the heat exchanger. Generally, when the temperature difference between the tube wall and the shell wall is more than 50 ° C, for safety reasons, the heat exchanger should have a temperature difference compensation device. But the compensation device (expansion joint) can only be used when the temperature difference between the shell wall and the pipe wall is below 60-70 ° C and the fluid pressure in the shell side is not high. When the pressure on the shell exceeds 0.6Mpa, due to the excessive thickness of the compensation ring, it is difficult to expand and contract, and the effect of temperature difference compensation is lost. Therefore, other structures should be considered.

U-tube heat exchanger

       The U-shaped tube heat exchanger has each tube bent into a U-shape and fixed at both ends on the same tube plate. Each tube can freely expand and contract, thus solving the problem of thermal compensation. The tube has at least two passes, the tube bundle can be removed for cleaning, and the tubes can expand freely. Its structure is simple, lightweight, and suitable for high temperature and high pressure conditions.

Immersive snake tube heat exchanger

       The heat exchanger with serpentine tubes as heat transfer elements is one of the types of wall mounted heat exchangers. It has a simple structure, easy manufacturing, installation, cleaning and maintenance, low price, and is particularly suitable for cooling high-pressure fluids, so it is still widely used.

Technical Specifications