Rotary Kiln Technology

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Direct fired rotary kiln incineration is proven to be the best available technique for small & medium scale waste disposal requirements. It has a good thermal treatment solution for safe and effective destruction of heterogeneous and difficult to handle wastes.

This technology is a robust, Stable & reliable waste processing technology, at well controlled combustion conditions.

The system is capable of accepting and treating the harshest heterogeneous waste mixtures, and is able to accommodate large variations in particle sizes, waste composition and calorific value.

The continuous rotation process avoids the possible risk of waste solidification at the bottom, and warrants maximum combustion efficiency with minimal resulting premium-quality bottom ash. Where the waste calorific value and oxygen supply are sufficient, this will lead to a continuous thermal chain reaction, and self-supporting combustion, without the need for additional fossil fuels (diesel or gas) during the incineration process.

Rotary kiln is not the cheapest incineration technology, but if operates accurately, it’s the easiest to operate, most versatile in waste acceptance and utmost reliable in day to day operation and maintenance. Put differently, it’s the multi-purpose workhorse of all small-medium thermal treatment systems available.

Advantages

  • Can be used for a wide variety of both liquids and solid, as explained before.

  • The combustion process of rotary kiln incinerators has a high thermal stability, because of the long residence time of combustible wastes in process (30 – 90 minutes). The rotational speed of the kiln can be adjusted to control the residence time in the primary combustion zone. Continuous waste feeding and ash removal don’t interfere with the temperature and combustion

  • Incinerator technology guarantees a minimum plant uptime of 90%, with only 1 prescheduled complete shutdown for general annual maintenance service.

  • The facilities are completely programmed, automated, operated and monitored with I.P. protected specific software, driven with PLC visualization system (SCADA), and built with high quality European components. The control system has a separate push button-based workstation, combined with a Windows based PC workstation, installed with visible alarms. It’s located adjacent to the loading bay, to allow for fast and straightforward intervention by the operator in case of a corrective action.

  • Usually, there is no need for prior waste sorting, crushing, shredding or mixing, pre-heating as long as the waste calorific value is adequate for

  • Size of the waste is only limited by the dimension of the rotating kiln guillotine door and ash discharge system. Dependent on the incinerator entrance, system can accept plastic and metal drums, IBCs, wooden and plastic pallets, FIBCs, etc., without any difficulty.

  • Waste feeding systems are hygienic and automatic and do not negatively influence the temperature and air supply in the primary and post combustion chambers.

  • High corrosion resistance; primary and post combustion chambers are refractory lined, with special high temperature resistant refractory concrete (castable), or bricks.

  • Low need for operating manpower; Actual manpower depends on the size of the system, but as for safety precaution, normally 2 operators per shift is obvious.

  • Low maintenance requirement; normally 1 prescheduled complete shutdown per year, of maximum 10-15 consecutive days, for general annual maintenance service and wear and tear repairs. Daily or weekly routine inspection and systematic upkeep is performed by the incinerator operator, for smooth operation and to maximize the lifespan of the mechanical system.

  • Occupational health and safety; A full automated shutdown will be initiated immediately, in case of excessive operating conditions, fire or loss of electrical power. The plant is provided with sufficient sidewalks to ensure that operators will be able to walk safely about the Whereas practically possible, hot surfaces and moving devices are covered with insulation or protected with safety mesh, to prevent from direct contact.