Temperature resistance challenges of solid waste incineration boilers and the application of high-performance refractory materials

As an important means of treating urban and industrial solid waste, the operating efficiency and stability of solid waste incineration boilers are directly related to the efficiency of waste treatment and the effect of environmental protection. During operation, the temperature in the furnace can reach extremely high levels, usually 850~1100℃, and even higher in some high-efficiency incineration systems. This extreme high temperature environment poses a severe challenge to the temperature resistance of the boiler. Therefore, high-melting-point refractory materials are widely used inside the boiler to ensure that it can operate stably in a high temperature environment and keep its performance unchanged.

Temperature resistance challenge: stable operation under extreme high temperature
The working principle of solid waste incineration boilers is to burn solid waste at high temperature and convert it into ash and flue gas. The combustion process in the furnace is a complex physical and chemical process involving multiple stages such as ignition, combustion and burnout of the fuel. In this process, the temperature in the furnace rises rapidly and remains at an extremely high level. This high temperature environment not only accelerates the thermal expansion and thermal stress of the materials inside the boiler, but also may cause changes in the chemical properties of the materials, thereby affecting the stability and safety of the boiler.

In order to meet this challenge, boiler manufacturers must fully consider the temperature resistance of materials during the design process. They must not only choose materials with high melting points and good thermal conductivity, but also ensure that these materials have good thermal stability and thermal shock resistance at high temperatures. Only in this way can the boiler maintain stable operation under extreme high temperature environments and ensure efficient and environmentally friendly waste treatment.

Application of high-performance refractory materials: the key to ensuring stable operation of boilers
In order to meet the temperature resistance requirements of solid waste incineration boilers, high-melting-point refractory materials are widely used inside the boiler. These materials not only have high melting points and can withstand the test of high temperature environments, but also have good thermal stability and thermal shock resistance, and can maintain their performance unchanged at high temperatures.

High-aluminum refractory materials: High-aluminum refractory materials are one of the commonly used refractory materials in solid waste incineration boilers. Its main component is alumina, which has a high melting point, high strength and good thermal shock resistance. This material can maintain stable performance in a high temperature environment of 850~1100℃ and is not prone to deformation or cracking.
Silica refractory materials: Silica refractory materials are also one of the commonly used high-temperature refractory materials. Its main component is silicon dioxide, which has excellent resistance to high-temperature oxidation and thermal shock. In solid waste incineration boilers, siliceous refractory materials are often used for furnace lining and insulation to reduce heat loss and furnace wall temperature.
Mullite refractory: Mullite is a composite oxide composed of alumina and silicon dioxide, with an extremely high melting point and good thermal stability. In solid waste incineration boilers, mullite refractory materials are often used to make high-temperature components, such as furnace outlets and flues.
Maintenance and renewal of refractory materials: ensuring long-term and stable operation of boilers
Although high-performance refractory materials can significantly improve the temperature resistance of solid waste incineration boilers, these materials will still be eroded by high temperatures and chemical reactions during long-term operation, resulting in performance degradation. Therefore, regular maintenance and renewal of refractory materials inside the boiler is the key to ensuring long-term and stable operation of the boiler.

During the maintenance process, it is necessary to check the wear and corrosion of the refractory materials and replace the damaged materials in time. At the same time, the boiler also needs to be cleaned and maintained regularly to reduce the erosion of ash and flue gas on the refractory materials. Through scientific maintenance and renewal strategies, the service life of the boiler can be extended and the efficiency and environmental performance of waste treatment can be improved.