In the design process of solid waste treatment incinerators, the design of the lining materials should follow the following rules:

Furnace lining materials should be selected according to the temperature of the furnace to withstand the incineration temperature of refractory materials and thermal insulation materials, and should consider the corrosion of the incinerated waste and incineration products to the furnace lining. When burning alkaline waste water, the alkaline melt in the combustion product is very corrosive to ordinary clay firebricks, so it is necessary to choose high-aluminum refractory with higher alumina content, or choose chrome magnesium, magnesium and aluminum-magnesium refractory with better alkaline corrosion resistance. In order to resist the penetration and corrosion of salt and alkali and other media, and improve the slag resistance of the material, the material with small porosity should be generally selected.

When selecting incinerator lining materials, attention should be paid to the temperature and corrosion conditions of different parts of the furnace, and different grades of materials should be used according to the working conditions of different parts. Such as the combustion chamber. The high temperature is 1400~1600℃, corundum brick containing Al2O3=90% can be selected; The working temperature of the upper part of the furnace is 900~1000℃, the cone is provided with a waste liquid nozzle, and high aluminum bricks containing Al2O3>75% can be selected; The temperature in the middle of the furnace is 900℃, but the molten salt and alkali flow down the lining, the lining corrosion is heavy, and the first-class high aluminum brick can be used. The working conditions of the lower part of the furnace are basically the same as those in the middle of the furnace, when there are a lot of molten salt and alkali in the combustion products, because the molten materials gather on the slope, stay long, easy to penetrate into the refractory, such as Na2CO3 when the corrosion is serious, so the working conditions are worse than the middle of the furnace, dense materials with lower porosity should be selected, such as the selection of fused refractory products. It is impossible to ask the lining not to be corroded or damaged. Usually, when there is Na2SO3 and NaOH corrosion, the better material is used and the service life is only 2 to 3 years. The more corrosive Na2CO3 has a service life of only about one year.

In addition to the selection of materials to withstand high temperature (corrosion resistance), it is also necessary to consider the heat resistance and corrosion resistance of lining brackets, anchoring parts and steel shell and plate materials, as well as reasonable lining thickness. Refractory materials with integrity and tightness should be used as lining, such as heat-resistant concrete and refractory plastics, to reduce the gas channeling of brick joints. In addition, the thickness of the furnace wall should not be too large, and the temperature of the furnace wall should be high, so as to avoid acidic gas being condensed down and corroding the furnace wall. However, the furnace wall temperature should not be designed too high, too high temperature will cause shell deformation, affect the environment.