**I. Introduction**With the acceleration of urbanization, waste disposal has become a major challenge for city managers. As an effective way to dispose of garbage, small waste incinerators have gradually attracted attention. This article will focus on the selection of refractory materials for small waste incinerators and their working principles to help readers better understand this technology. List of high-quality authors**Second, the selection of refractory materials for small waste incinerators**1High-temperature refractories: Due to the high temperature during the waste incineration process, the refractories in the furnace need to have the ability to withstand high temperatures. Common refractories include mullite, corundum, silica, etc., which can remain stable at high temperatures up to 1500 °C. 2.Wear-resistant materials: Corrosive and abrasive substances will be produced during the waste incineration process, so refractory materials need to have good wear resistance. Commonly used wear-resistant materials include high alumina, corundum, and mullite. 3.Chemically resistant materials: Chemicals in garbage can corrode refractories at high temperatures, so refractory materials that can resist chemical attack need to be selected.
3. The working principle of small garbage incinerator**
The basic working principle of small waste incinerator can be summarized as three main links: "combustion-waste heat-flue gas purification".
1.Combustion: After the garbage enters the incinerator, it is fully burned in a high temperature environment of more than 800 meters. This process releases a large amount of heat while converting organic matter into inorganic matter.
2.Waste heat**: The heat generated by combustion can be used to generate steam or hot water through the heat exchanger, so as to realize the reuse of energy.
3.Flue gas purification: In order to reduce secondary pollution, the flue gas produced by incineration needs to go through dust removal, desulfurization, denitrification and other treatment links to ensure that the emission standards are met.
IV. Conclusions**
As an efficient and environmentally friendly garbage disposal method, the selection of refractory materials and the working principle of small waste incinerator are the key factors to ensure its stable operation. Through the rational configuration of refractory materials and the optimization of the work process, the efficiency of waste disposal can be effectively improved and the environmental impact can be reduced. In the future, with the advancement of technology, small waste incinerators are expected to be applied in more scenarios and play a greater role in urban environmental governance.