Incinerating Waste Kiln For Waste Recycling

Many kilns, by definition, are refractory lined – using materials which are resistant to decomposition by heat, pressure or chemical attack. The refractory retains its strength and form at high temperatures.

Basically, rotary kilns are rotary shells that are insulated on the inside – which must be done with precise engineering, design and installation of the refractory bricks or other interior lining. Special focus must be placed on the critical relationship between the dryer shell and its rolling components.

Hengyang Industry

Hengyang Industry provides both refractory lined Direct-Fired Kilns and Indirect Heat Kilns – often for incineration and gasification of petroleum sludges, biomass, or municipal solid waste. The process material is heated in the rotary unit and in a semi-inert gas stream. The complex organic molecules are converted to synthesis gas. This syngas is withdrawn to a secondary combustion system – ultimately converting waste to energy.

Feeding/discharge:
Automatic and continuous. Vibrators, screw feeders, rotary airlocks, double flap valves, gravity chutes
Feed Characteristics:
Powders, granules, non-friable agglomerates. Low to high feed rates <45tph
Heat Source:
Electrical, steam, gas, liquid fuel
Exposure:
Product contacts the heated surface of the drum. Special lifters turn the product exposing the new product to the heated surface.
Residence time:
Controllable. Residence time can be altered by varying the speed of rotation of the drum and the drum angle. Fill can be varied. Fills are typically between 5% and 20% of the cross-sectional area of the drum.
Extraction:
Normally induced but depends on the process requirements.
Dust Collection:
Systems can be low dust with minimal separation requirements.
If required cyclones, baghouses, scrubbers, Electrostatic precipitators.
Control:
PLC, infrequently solid-state controllers. System controls on discharge temperature. Can modulate energy and feed.
Benefits:
High throughput
Excellent energy utilization for electrical units
Can have zoned temperature profile
Gentle handling
Intimate product contact
High-temperature operation – can be refractory lined.
The unit can have an integral cooling section.
Limitations:
Incorrect seal design can cause leakage
Large real estate required
High temperature can cause damage to certain components