The amount of hazardous waste generated has also increased dramatically. In particular, if hazardous waste such as medical and chemical solid waste and waste liquid is not properly handled, it will cause serious pollution to the ecological environment and pose a direct threat to human health. The rotary kiln type waste incinerator is a thermal treatment equipment for incinerating waste (including domestic waste and medical waste). It can not only treat medical solid and semi-solid waste hazardous waste, but also treat medical hazardous waste liquid; it meets the environmental protection requirements of stabilization, safety, reduction and harmlessness of urban waste, and at the same time conforms to the development trend of contemporary medical waste and domestic waste treatment.
According to the physical state and temperature range of ash in the kiln, the rotary kiln can be divided into dry ash type and slag type. The temperature in the dry ash rotary kiln is lower than 1000℃, and the solid in the kiln has not yet melted and is still solid ash slag. The temperature in the slag rotary kiln may be as high as 1350℃. Except for high-melting-point metals and their compounds, the inert substances in the solid waste are all melted in the kiln, so the degree of incineration is relatively complete.
Features of rotary kiln waste incinerator:
(1) This equipment can incinerate solid waste, liquid, colloid, and gas at the same time, and has strong adaptability to the incineration materials;
(2) The incineration materials tumble forward, and three heat transfer methods coexist in one furnace, with a high heat utilization rate;
(3) High-temperature materials contact refractory materials, which makes it easy to replace the furnace lining and low cost;
(4) The transmission mechanism is simple, the transmission mechanism is in the kiln shell, and the equipment maintenance is simple;
(5) The shape and moisture content of the incineration materials are not high;
(6) The residence time of up to 1 hour and the high temperature of 700℃ in the rotary kiln basically burn out the hazardous waste; the strong gas mixing in the secondary combustion chamber makes the incompletely burned materials in the flue gas completely burn and decompose the harmful components. The required high temperature (1100℃) and the flue gas residence time in the high temperature zone are 2 seconds; not only can the garbage be burned completely, but also the working area that produces dioxins can be avoided or reduced from the source;
(7) Good sealing measures and negative pressure in the furnace can ensure that harmful gases do not leak out;
(8) The equipment has a high operating rate, and the annual operating rate can generally reach 90%; it is easy to operate and maintain;
(9) The rotary kiln is equipped with enhanced heat exchange and slagging prevention devices, which not only improves the incineration efficiency but also expands the adaptability of the incinerator to waste;
(10) The traditional secondary combustion chamber is transformed into a secondary combustion furnace, which improves the burnout rate of ash and slag, and improves the incineration efficiency of the rotary kiln. At the same time, it has comprehensive functions such as room temperature slag discharge, slag crushing, and closed air lock.
Rotary kiln waste incinerator application scope:
Applicable to the treatment of industrial waste, hazardous solid waste, and medical solid waste in the chemical, pharmaceutical, electronic, printing and dyeing, automobile, machinery and other industries; it can simultaneously treat solid, liquid, semi-solid and other wastes in multiple phases.
