Specifications

  Rotary Incinerator,waste incinerator,rotary kiln incinerator 

Products

An incinerator is a sophisticated piece of equipment that converts non-recyclable waste to maximum amount of energy and disposes the minimum amount of residues. The incinerator creates an environmentally-optimal solution for medical, hazardous and non-recyclable waste. 
 
Solid waste generate a lot of ashes during the combustion process, this is why the combustion chamber of an incinerator has to evacuate the ashes if the amount of waste is > 90 kg/h. For small amount of waste a static hearth incinerator is suitable, for amount > 300 kg/h a rotary kiln, moving grate or fluidized bed incinerator is used.
 
For solid waste, where the calorific value high, a rotary kiln incinerator is a suitable technology. The rotary kiln incinerator is typically used for medical and hazardous waste.
 
For solid waste, where the calorific value is very low, a grate incinerator is a suitable technology. The grate incinerator is typically used for domestic or household waste. If medical waste would be incinerated in a grate incinerator, the grate will have "hot spots" and can be damaged. This is why the grate incinerator needs a special separate feeding line for high calorific wastes. So the grate can not handle very high temperatures, this is why only the rotary kiln is used for the "high-risk" medical waste. (Low riks medical waste is for example packaging of medicines, high risk medical waste are for example used needles, textile wastes of operations, etc.)
 
For solid waste, where the density is low and which is very homogenous, a fluidized bed incinerator is the suitable solution. The fluidized bed incinerator is typically used for WWTP sludge.

Drive Gear

The kiln is usually turned by means of a single Girth Gear surrounding a cooler part of the kiln tube, but sometimes it is turned by driven rollers. The gear is connected through a gear train to a variable-speed electric motor. This must have high starting torque in order to start the kiln with a large eccentric load. A 6 x 60 m kiln requires around 800 kW to turn at 3 rpm. The speed of material flow through the kiln is proportional to rotation speed, and so a variable speed drive is needed in order to control this. When driving through rollers, hydraulic drives may be used. These have the advantage of developing extremely high torque. In many processes, it is dangerous to allow a hot kiln to stand still if the drive power fails. Temperature differences between the top and bottom of the kiln may cause the kiln to warp, and refractory is damaged. It is therefore normal to provide an auxiliary drive for use during power cuts. This may be a small electric motor with an independent power supply, or a diesel engine. This turns the kiln very slowly, but enough to prevent damage.

Internal heat exchangers

Heat exchange in a rotary kiln may be by conduction, convection and radiation, in descending order of efficiency. In low-temperature processes, and in the cooler parts of long kilns lacking preheaters, the kiln is often furnished with internal heat exchangers to encourage heat exchange between the gas and the feed. These may consist of scoops or "lifters" that cascade the feed through the gas stream, or may be metallic inserts that heat up in the upper part of the kiln, and impart the heat to the feed as they dip below the feed surface as the kiln rotates. The latter are favoured where lifters would cause excessive dust pick-up. The most common heat exchanger consists of chains hanging in curtains across the gas stream.

4. Technical Specification Of Calcination Rotary Kiln

5. Features Of Calcination Rotary Kiln

• High productivity 2.5-200tph;
• Low heat consumption 20%
• Excellent clinker quality and stable operation
• High economic efficiency
• Support quantity: 3
• Obliquity: 3--3.5-4
• Power: 30-420kw
• Weight: 53-598.5tons