摘要:
Gas fired radiant emitter having a premixing chamber for preparing a premix of gas and air; a perforated ceramic plate acting as burner deck; and a pilot burner having a premix gas supply flow tube and two electrodes. The premix gas supply flow tube of the pilot burner extends from the side of the perforated ceramic plate where the premixing chamber is located, into a through hole in the perforated ceramic plate. The premix gas supply flow tube has a gas exit in the through hole in the perforated ceramic plate or at the combustion side of the perforated ceramic plate. The gas fired radiant emitter has features so that in an area of the perforated ceramic plate around where the premix gas supply flow tube extends into a through hole in the perforated ceramic plate, no premix gas flows through the perforated ceramic plate.
摘要:
The invention relates to a method for manufacturinga gas fired radiant emitter with increased emissivity. The method comprises the steps of - providing a porous ceramic burner deck, e.g. a perforated ceramic burner deck, - applying a wet coating layer on the porous ceramic burner deck, wherein the wet coating layer comprises ceramic particles and/or metallic particles that will form a coating layer with increased emissivity compared to the porous ceramic burner deck without the coating layer, - sintering and/or curing the coating layer, whereby the sintering and/or curing is performed by operating the gas fired radiant emitter in which the porous ceramic burner deck is mounted, via supplying combustible gas to the radiant emitter and igniting the combustible gas after it has flown through the porous ceramic burner deck, whereby the uncured and/or unsintered coating layer is transformed into a sintered and/or cured coating layer adhering to the porous ceramic burner deck via sintered and/or cured bonds.
摘要:
A cooling system is described for the continuous cooling of sheet metal strip. The cooling system is installed downstream of a continuous oven which is drying a coating applied to the sheet metal. The cooling system is provided with means for blowing cooling air onto the sheet metal strip. The cooling system comprises -for at least part of the means for blowing cooling air onto the sheet metal strip - means for increasing the temperature of the cooling air prior to blowing the cooling air onto the sheet metal. A method is disclosed for using such cooling systems, e.g. for cooling coatings comprising magnesium oxide that are applied on grain-oriented electrical steel.
摘要:
L'invention concerne une installation de séchage (1) destinée au séchage en continu d'un matériau en bande mobile (2). L'installation comprend : - des éléments rayonnants ou chauffants (6), brûlant du gaz, - un système (8) de circulation de flux gazeux configuré pour aspirer des produits de combustion générés par les éléments rayonnants ou chauffants (6). Le système de circulation de flux gazeux (8) comporte également une conduite d'extraction (16) configurée pour l'évacuation hors de l'installation (1), d'au moins une partie des produits de combustion aspirés par le système de circulation de flux gazeux (8). L'installation (1) comporte également un dispositif de traitement (18) du monoxyde de carbone et éventuellement d'oxydes d'azote, le dispositif de traitement (18) comportant un catalyseur (20) d'oxydation et éventuellement de réduction et étant monté sur ou en aval de ladite conduite d'extraction (16) afin de traiter le monoxyde de carbone et éventuellement les oxydes d'azote contenus dans les produits de combustion. L'installation (1) comporte notamment un moyen de régulation (22) configuré pour réguler la température du catalyseur (20) à une température supérieure ou égale à 130°C.