title: Modelling piloted ignition of wood and plastics.
abstract: To gain insight in the startup of an incinerator, this article deals with piloted ignition. A newly developed model is described to predict the piloted ignition times of wood, PMMA and PVC. The model is based on the lower flammability limit and the adiabatic flame temperature at this limit. The incoming radiative heat flux, sample thickness and moisture content are some of the used variables. Not only the ignition time can be calculated with the model, but also the mass flux and surface temperature at ignition. The ignition times for softwoods and PMMA are mainly under-predicted. For hardwoods and PVC the predicted ignition times agree well with experimental results. Due to a significant scatter in the experimental data the mass flux and surface temperature calculated with the model are hard to validate. The model is applied on the startup of a municipal waste incineration plant. For this process a maximum allowable primary air flow is derived. When the primary air flow is above this maximum air flow, no ignition can be obtained.
authors.affiliation: TNO, Schoemakerstraat 97, 2628 VK Delft, The Netherlands.
authors.forename: Maarten
authors.initials: M
authors.lastname: van Blijderveen
authors.forename: Eddy A
authors.initials: EA
authors.lastname: Bramer
authors.forename: Gerrit
authors.initials: G
authors.lastname: Brem
mesh_terms: D005390:Fires; D006358:Hot Temperature; D017745:Incineration; D008962:Models, Theoretical; D028223:Pinus; D019904:Polymethyl Methacrylate; D011143:Polyvinyl Chloride; D014934:Wood
chemical_list: D011143:Polyvinyl Chloride; D019904:Polymethyl Methacrylate