The rotary kiln is a widely used incineration equipment in the industrial waste treatment field, accounting for about 85% of the market share in the incineration of industrial waste. It is also recommended as a type of incinerator in the national industrial waste treatment technology policy issued by China's Ministry of Science and Technology and the State Environmental Protection Administration. It can simultaneously handle solid, liquid, and gaseous waste. Solid waste is fed into the rotary kiln by conveying equipment, liquid waste is sprayed into the kiln through atomization equipment, and gases are introduced into the kiln via pipelines. The solid waste undergoes moisture evaporation, volatile matter precipitation, ignition, and combustion within the kiln. The ash and slag composition is discharged from the bottom of the discharge box, and the produced flue gas enters the secondary combustion chamber, where it is mixed with secondary combustion air to achieve complete combustion of the flue gas and ensure safe and standard emissions of exhaust gases. The characteristics of the rotary incineration kiln include a wide adaptability to waste, simple operation and maintenance, and a long service life.
The features of this rotary kiln are summarized as follows:
This equipment can simultaneously incinerate solid waste, liquids, colloids, and gases, with strong adaptability to the types of incinerable materials.
The material being incinerated tumbles forward in the kiln, with rapid heat conduction and high incineration efficiency.
Replacements for the furnace lining are easy and cost-effective.
Simple transmission mechanism with open gear sets; easy equipment maintenance.
No strict requirements for the shape of the incinerated materials and moisture content.
Material retention time in the furnace is adjustable and can exceed one hour, with combustion temperatures maintained above 800°C, ensuring that hazardous waste is largely incinerated; the secondary combustion chamber's high temperature of 1100°C, the strong mixing of secondary air, and the 2-second residence time of flue gas ensure that the harmful components that have not been fully decomposed are completely broken down; not only does it incinerate the garbage thoroughly, but it also avoids or reduces the formation of dioxins at the source.
Good sealing measures and negative furnace pressure ensure no harmful gases are leaked out.
High equipment operation rate, with an annual operation rate typically exceeding 90%; easy to operate and maintain.