A certain acrylic wastewater incinerator lined with refractory materials experienced severe erosion and stripping after only one year of use, especially in the upper quarter of the upslope section and the middle straight section. In view of this situation, we have conducted an analysis. When the spray atomization of the waste liquid is normal, the erosion and peeling of the incinerator lining is mainly due to the reaction of part of the incompletely burned waste liquid and the combustion products of the waste liquid in contact with the furnace wall lining. The compound that damages it causes cracks in the inner lining. The reacted chemicals are easy to peel off from the surface of the inner lining, thereby taking away the cracked part of the inner lining, making the furnace inner lining gradually thinner, and the upper inclined section is straight from the middle. The upper quarter of the section is the main mixing reaction zone, where the atomized waste liquid and combustion products accumulate the most on the furnace wall, and the contact reaction is the most serious, so the erosion and stripping are the most serious;

When the atomization of the waste liquid is not normal, most of the waste liquid is directly sprayed on the furnace lining, so that the temperature of the scoured local lining is drastically reduced, forming a temperature difference with the surrounding furnace lining, thereby generating internal stress. When the internal stress exceeds the strength of the furnace lining, cracks will occur. As time goes by, the cracks will continue to expand and break, causing the furnace lining to peel off and become thinner. The upper quarter of the upslope section and the middle straight section are Erosion erodes the most directly contacted part, so erosion and peeling are the most serious. For this reason, we must choose refractory materials with good corrosion resistance, high thermal shock resistance, and good high-temperature volume stability as the lining refractories of the incinerator.

Combining the lining of the incinerator at the upper 1/4 of the upslope section and the middle straight section, the most easily damaged and the most severely damaged situation, considering the physical and chemical properties of the material and the economic cost, we choose zirconium corundum mullite bricks, dense high-alumina bricks, high-aluminum light-weight insulation bricks and corresponding matching refractory mortar, on the inner lining surface above 7050mm (2/3 of the middle straight section, with the bottom of the residual reaction zone as the reference surface) Layers of zirconia corundum mullite bricks are built, 0-7050mm lining surface layer is built of dense high-alumina bricks, and the entire incinerator is lined with high-alumina light weight refractory bricks.