Advantages of Shell and Tube Heat Exchanger in High Temperature Flue Gas Waste Heat Recovery

Shell and tube heat exchanger has the following advantages in high temperature flue gas waste heat recovery:

Adapt to high temperature and high pressure environment:

High temperature resistance: Shell and tube heat exchanger is usually made of metal materials, which can withstand the heat of high temperature flue gas and can operate stably at higher temperatures, which is suitable for high temperature flue gas waste heat recovery scenarios. Generally speaking, as long as the selection of appropriate metal materials, such as heat-resistant steel, etc., shell and tube heat exchanger is able to work at several hundred degrees Celsius or even higher temperatures, which is very important for the recovery of a large amount of waste heat in the high-temperature flue gas.

High pressure resistance: in industrial production, high temperature flue gas is often accompanied by high pressure, shell and tube heat exchanger structure design makes it able to withstand greater pressure, to ensure the safe operation of the equipment in high-pressure environments, will not be due to pressure changes and leakage and other issues.

Solid and reliable structure:

Solid structure: its structure is mainly composed of shell and tube bundle, the shell is cylindrical, can provide good support and protection, the tube bundle is fixed on the tube plate, with high mechanical strength. This structure makes the shell and tube heat exchanger can withstand a certain degree of vibration, shock and thermal stress, in the complex industrial environment to maintain stable performance.

Not easy to leak: Shell and tube heat exchanger has better sealing performance in the connection parts, which makes it less likely to leak compared to some other types of heat exchangers, such as plate heat exchangers. In the process of high-temperature flue gas waste heat recovery, it can ensure the effective isolation between the flue gas and the heated medium, avoiding the safety hazards and energy loss caused by medium leakage.

Higher heat transfer efficiency:

Larger heat transfer area: the tube bundle of the shell and tube heat exchanger consists of multiple tubes, which increases the heat transfer area, enabling full contact between the high temperature flue gas and the heated medium, and improving the heat transfer efficiency. And you can choose different tube diameters, tube lengths and arrangements of tube bundles according to the actual demand to further optimise the heat transfer effect.

Reinforcement of heat transfer measures: by setting up folding plates and other components in the shell, the flow direction and speed of high-temperature flue gas can be changed to increase the degree of turbulence of the fluid, thereby improving the heat transfer coefficient. The fluid in turbulent state can transfer heat to the tube bundle more effectively, which improves the overall heat transfer efficiency of the heat exchanger.

Wide applicability:

Strong adaptability to the medium: able to deal with a variety of different properties of the medium, whether gas, liquid or gas-liquid mixture, can be in the shell and tube heat exchanger for heat exchange. For high-temperature flue gas such a special medium, shell and tube heat exchanger can effectively transfer its heat to other media that need to be heated, such as air, water, oil, etc., to meet the waste heat recovery needs of different industrial production processes.

Can be used in a variety of working conditions: applicable to different scales of industrial production, whether it is a large-scale power plants, chemical plants, or small industrial furnaces and kilns, etc., can be based on the actual situation to choose the appropriate specifications of the shell and tube heat exchanger. And in different working conditions, such as continuous or intermittent operation, shell and tube heat exchanger can maintain good performance.

Easy maintenance and cleaning:

Convenient maintenance: the structure of shell and tube heat exchanger is relatively simple, the connection and disassembly of the components are more convenient, when maintenance or overhaul is required, the equipment can be disassembled and assembled more easily. For example, if the tube bundle is found to be clogged or damaged, etc., the tube bundle can be replaced or cleaned separately, which reduces the maintenance cost and difficulty.

Easy to clean: Since the shell process and tube process are separate, after running for a period of time, if the inner wall of the shell or the surface of the tube bundle accumulates dirt, it can be cleaned by the corresponding cleaning method. For the tube process, you can use mechanical cleaning or chemical cleaning to remove the dirt inside the tube; for the shell process, you can open the shell for flushing or special cleaning tools to clean up, to ensure the long-term stable operation of the heat exchanger.

Good economic benefits:

Energy saving effect is remarkable: through the recovery of waste heat in the high-temperature flue gas, it can reduce the waste of energy and improve the efficiency of energy use, thus reducing the production cost for the enterprise. For example, the recovered waste heat can be used to preheat air or water, which can reduce the demand for external energy and save fuel consumption.

Long service life: High-quality shell and tube heat exchangers are made of corrosion-resistant and high-temperature-resistant materials and have a long service life. Under normal use and maintenance, it can work stably for a long time and bring continuous economic benefits to the enterprise.