Incineration of animal by-products – The impact of selected parameters on the flux of flue gas enthalpy

• Published in: Waste management (Elmsford) 2016-04, Vol.50, p.309-323
• Main Authors: Bujak, Janusz, Sitarz, Piotr
• Format: Article
• Language: English
• Subjects: Animal by-products; Animals; Byproducts; Combustion; Design engineering; Flue gases; Flux; Gases - analysis; Incineration; Industrial Waste - analysis; Mathematical models; Meat; Meat-Packing Industry; Models, Theoretical; Rotary kiln; Thermal treatment of waste; Thermodynamics; Wastes; Work field
• ISSN: 0956-053X; 1879-2456
• DOI: 10.1016/j.wasman.2016.02.024

•Tests of the animal by-product thermal treatment plant were presented.•A test schedule was prepared and 62,024 cases of system operation were analysed.•An increase heat loss to the atmosphere caused higher consumption of additional fuel.•An increase oxygen in the flue gases caused increased consumption of additional fuel. This paper presents model analyses and tests of animal by-product waste thermal treatment plants. A schedule of tests was prepared, and 62,024 cases of system operation were analysed. A map/work field of the tested plant was drawn up on the basis thereof. Calculations were made following an algorithm described by Bujak (2015a) written in the VBA (Visual Basic for Application) language. The tests showed that when incinerating animal waste, the flux of physical enthalpy of the flue gas from the afterburner chamber depends on numerous design and operating parameters. The most important include the following: humidity and flux of the waste, concentration of oxygen in the flue gas in the afterburner chamber and loss of heat flux to the atmosphere through the external surfaces of the plant. Individual design and operating parameters can be selected so that the process of incineration is ensured without additional fuel. The performed analyses were verified against the actual object at the industrial scale using a meat plant that manufactures ham and processes beef, pork and poultry with a capacity of 150tonnes/day. The production process waste included mainly bones and – in much smaller quantities – meat and bone meal, at 17tonnes/day. The performed tests and analyses can be used to optimise the operation of the waste thermal treatment plant at the stages of design and operation.