摘要:
A cement manufacturing plant comprises a raw meal mill, at least one preheater string, a clinker furnace and a clinker cooler comprising a first section and a second section, wherein preheater exhaust gas recirculation means are provided for recirculating exhaust gas leaving the at least one preheater string into the first section of the clinker cooler, and wherein the cement plant is configured for switching between an air operation mode and an oxyfuel operation mode, comprising first switching means for connecting either a source of air or a source of oxygen rich gas to a burning zone of the clinker furnace burner, and second switching means for either establishing or separating a connection of the preheater exhaust gas recirculation means to the first section of the clinker cooler.
摘要:
Bei einer L-förmigen Schaufel für Rohrkühler, insbesondere für solche zur Zerkleinerung und Abkühlung von Zementklinker, bildet einer der Schenkel einen Befestigungsabschnitt (1) und der andere einen Mitnehmerabschnitt (5) für zu kühlendes Gut. In dem Mitnehmerabschnitt (5) ist eine Aufnahmemulde (7) vorgesehen. Eine Bezugsebene (B), die im mittleren Bereich der Hubschaufel durch die vordere und die hintere Begrenzungskante der Aufnahmemulde (7) führt, bildet mit dem Befestigungsabschnitt (1) einen Winkel α von 93° bis 105°. Die Tiefe der Aufnahmemulde (7) in der Längsmitte der Bezugsebene (B) gemessen beträgt 2,5 bis 3,0 cm, während die Länge (L) des Aufnahmeabschnitts (5) 16 bis 24 cm beträgt.
摘要:
The invention relates to a device (100) for cooling the opening of a rotary kiln by means of cool air-blowing, said kiln comprising a metal cylinder (3) lined internally with a refractory material (73) and being rotatably mounted relative to the frame of the kiln, into which materials are intended to be inserted and fired. The cooling device (100) comprises: the aforementioned cylinder (3) of the rotary kiln and a metal cylinder end part (4) covered with a refractory material (74) and secured to the cylinder (3); two concentric metal casings (5, 6), known as the inner casing (5) and the outer casing (6), which surround the cylinder (3) of the kiln (2) and form two annular channels (50, 60); and ventilation means that allow cool air to flow through said annular channels (50, 60). According to the invention, the device comprises: an annular distribution chamber (8) which surrounds the cylinder (3) of the kiln, is secured to said cylinder (3) and supplies the first channel (50) with air; ventilation means comprising at least one fan (9) and an electric motor actuating said at least one fan (9), said ventilation means being installed on the metal cylinder (3) of the kiln, rotatably mounted therewith, and supplying the distribution chamber (8) in an air-tight manner; and rotating electrical connectors (10, 11) that allow electricity to be supplied to the electric motor(s) of the ventilation means.