title: Study of composition change and agglomeration of flue gas cleaning residue from a fluidized bed waste incinerator.
abstract: Blocking of the collection hoppers of the baghouse filters in a fluidized bed incinerator for co-incineration of high calorific industrial solid waste and sludge was observed. The composition of the flue gas cleaning residue (FGCR), both from a blocked hopper and from a normal hopper, was investigated by (differential) thermogravimetric analysis, quantitative X-ray powder diffraction and wet chemical analysis. The lower elemental carbon concentration and the higher calcium carbonate concentration of the agglomerated sample was the result of oxidation of carbon and subsequent reaction of CO2 with CaO. The evolved heat causes a temperature increase, with the decomposition of CaOHCl as a consequence. The formation of calcite and calcium chloride and the evolution of heat caused agglomeration of the FGCR. Activated lignite coke was replaced by another adsorption agent with less carbon, so the auto-ignition temperature increased; since then no further block formation has occurred.
authors.affiliation: Department of Chemical Engineering, University of Leuven (K.U. Leuven), de Croylaan 46, 3001 Leuven, Belgium. patrick.lievens@groept.be
authors.forename: P
authors.initials: P
authors.lastname: Lievens
authors.forename: B
authors.initials: B
authors.lastname: Verbinnen
authors.forename: P
authors.initials: P
authors.lastname: Bollaert
authors.forename: N
authors.initials: N
authors.lastname: Alderweireldt
authors.forename: G
authors.initials: G
authors.lastname: Mertens
authors.forename: J
authors.initials: J
authors.lastname: Elsen
authors.forename: C
authors.initials: C
authors.lastname: Vandecasteele
mesh_terms: D000393:Air Pollutants / Q000737:chemistry* / Q000302:isolation & purification*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry* / Q000302:isolation & purification*; D017745:Incineration / Q000295:instrumentation* / Q000379:methods*; D007220:Industrial Waste / Q000517:prevention & control
chemical_list: D000393:Air Pollutants; D005740:Gases; D007220:Industrial Waste