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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

EXPERIMENTAL AND SIMULATION THERMAL ANALYSES FOR STAGED CO-INCINERATION OF SOLID AND LIQUID WASTES IN ROTARY KILN

Get access (open in a dialog) DOI: 10.1615/IHTC16.nee.022480
pages 7581-7589

Sinopsis

The disposal of waste with a complex composition that involves solid and liquid wastes simultaneously remains a problem in rotary kiln incinerators. A staged co-incineration scheme was proposed for solid and liquid waste disposal from a pesticide production process. The elemental composition, calorific value and ash melting point of the wastes were measured, and the mixing ratio of solid and liquid wastes was determined. A co-incineration experimental system was established, and incineration experiments were conducted with various incineration times. Experimental results demonstrated that solid and liquid wastes can be disposed of entirely by incinerating for 1 h at 800 °C in a rotary kiln. An innovative design was proposed for the staged co-incineration, in which the liquid waste was sprayed onto the high-temperature area of auxiliary fuel and solid waste combustion. The staged co-incineration was propitious to stable and complete combustion and conducive to reducing coke on the inner wall of the rotary kiln. A numerical simulation was performed based on FLUENT software to determine the temperature distribution and appropriate position of liquid waste that was sprayed onto the rotary kiln given the heat and mass transfer characteristics of the staged co-incineration. The optimisation and modification of the rotary kiln were implemented based on experimental and simulation thermal analyses. The practical operation of the staged co-incineration demonstrated the validity of waste disposal in the improved rotary kiln incinerator.