A boiler is a thermal energy device that converts the heat generated by fuel combustion into water or other media. Boilers play a crucial role in industrial production and civil heating. The superheater tube is an important component in a boiler, which can heat water vapor to a higher temperature and improve the thermal efficiency of the boiler.

The working principle of a boiler is to transfer the heat energy generated by fuel combustion to internal water or other media, and heat it into steam or hot water. The boiler mainly consists of a furnace, combustion chamber, smoke pipe, cooling equipment, etc. After the fuel is burned, the high-temperature combustion gas generated is transmitted to the superheater tube through the smoke pipe.

The superheater tube is located in the high-temperature area of the boiler, and its main function is to heat the water vapor to a higher temperature. Usually, the outer layer of the superheater tube is made of metal material, and the inner layer is made of higher alloy material. This design ensures that the superheater tube can withstand high temperature and high pressure environments.

In a boiler, steam passes through a series of process steps when passing through the superheater tube. Firstly, water vapor enters the superheater tube from the boiler furnace. Inside the superheater tube, the water vapor is heated by the flue gas, gradually increasing in temperature. The function of the superheater is to increase the temperature of the water vapor to about 500 ℃ or above, in order to increase the energy of the steam and improve the thermal efficiency of the boiler.

The position of the superheater tube in the boiler is usually at the rear of the boiler, used to receive heat energy from the flue gas. Therefore, the environment in which the superheater tubes are located is high temperature and pressure, and there are high requirements for the material and structure of the superheater tubes.

The structure of the superheater tube is usually straight or coiled. The structure of the straight tube superheater tube is relatively simple, consisting of two parts: the inner layer and the outer layer. The inner layer is a pressure pipe used to transmit water vapor; The outer layer is a protective layer mainly used to prevent smoke corrosion. The coil superheater tube is composed of multiple spiral coils, which are usually used in large boilers to improve heat exchange efficiency.

The working conditions of superheater tubes in boilers are relatively harsh, often influenced by factors such as high temperature, high pressure, and flue gas corrosion. Therefore, the material selection and protective measures of the superheater tube are very important. In general, the material of the superheater tube will be high-temperature alloy steel or heat-resistant steel.

In order to prevent corrosion and wear of the superheater tube, it is usually necessary to protect the outer layer of the superheater tube. The manufacturer of the superheater tube tells you that common protection methods include spray protection and heat-resistant material coating. Spray protection is the application of a high-temperature resistant coating on the outer surface of the superheater tube, which can effectively prevent smoke corrosion. Heat-resistant material coating is to cover the outer surface of the superheater tube with heat-resistant material, providing protection.

Overall, boilers and superheater tubes, as important components of thermal energy equipment, play an important role in industrial production and civil heating. The boiler generates heat energy by burning fuel and heats the water vapor to a higher temperature through a superheater tube, improving thermal efficiency. The superheater tube is required to have good resistance to high temperature, pressure, and corrosion when working in environments with high temperature, high pressure, and flue gas corrosion. For the selection of materials and protective measures for boilers and superheater tubes, it is necessary to make reasonable choices based on specific usage conditions to ensure their normal operation and service life.