Abstract:
The invention relates to multi-stage cement calcining plant suspension preheater of the kind mentioned in the introduction, wherein the preheater comprises a top separator comprising a central tube entering the top separator in a lowermost part of the separator housing whereas the central tubes of the bottom separators enters the separator housing in an upper part of the separator housing.
Abstract:
Die Erfindung betrifft einen mehrstufigen Wärmetauscher zum Wärmetausch zwischen einem Gasstrom und einem feinkörnigen oder mehligen Gut umfassend mehrere in Gasströmungsrichtung gesehen hintereinander angeordnete, jeweils einen Zyklonabscheider umfassende Abscheiderstufen (I, II, III, IV), wobei jeder Zyklonabscheider eine Gaszuleitung (12), durch welche das mit dem abzuscheidenden feinkörnigen Gut beladene Gas in den Abscheider einströmt, eine Gasableitung (13), durch welche das von dem feinkörnigen Gut (1a) gereinigte Gas aus dem Abscheider ausströmt, und eine am unteren Ende des Gehäuses angeordneten Austrittsöffnung (15) zum Ausschleusen des abgeschiedenen Gutes umfasst, wobei die Gasableitung jeweils eines Zyklonabscheiders mit der Gaszuleitung des in Gasströmungsrichtung nächstfolgenden Zyklonabscheiders über eine Gasstufe verbunden ist. Der erfindungsgemäße Wärmetauscher ist dadurch gekennzeichnet, dass wenigstens eine Gasstufe als Sinkgasstufe oder Quergasstufe ausgebildet ist. Ferner betrifft die Erfindung einen Zyklonabscheider zum Abscheiden von feinkörnigem Gut (1a) aus einem Gasstrom.
Abstract:
The invention concerns an installation for quick thermal treatment of suspended powder substances, in particular for flash calcining of mineral substances. Said installation comprises modules (M1, M2, M3) advantageously arranged in mobile units including means supplying powder substances, a combustion chamber (21) wherein the substances are introduced suspended in a hot air flux and a cooling assembly (M3) where the calcined substances are recuperated to pre-heat the combustion air. The substances are pneumatically transported in the heated air downstream of the supplying means, via a pre-heating device (17) up to the combustion chamber (21).
Abstract:
A method for the continuous treatment of particulate material, such as cement raw meal, in an apparatus comprising a stationary reactor (6) configured as a conical spouted bed, to which the material is fed and treated in a suspended bed by means of gas which, via a centrally arranged gas inlet (21), is injected at the bottom of the reactor (6) and flows upwards through the reactor (6), and wherefrom the material is discharged via an opening (21) at the bottom of the reactor (6). The dimensions, operating parameters of the reactor (6, 21) or the volumes of the connected apparatuses (8a) are selected and regulated in such a way that during operation the bed pulsates up and down in the reactor (6) at such an amplitude that a quantity of the bed material which corresponds to the quantity of fresh feed material, when the bed is situated in its lowermost position, is brought into a zone (22) in which the gas flow velocity is lower than the minimum velocity required for suspending the bed particles, and thereby drops through the gas flow out of the reactor (6).
Abstract:
In order to efficiently make a high quality cement clinker by firing with a small heat loss in a sintering method of a cement clinker which granulates and fires pre-heated cement raw material in a fluidized bed granulation/firing furnace and then introduces the clinker so granulated and fired into a cooler, by using only one fluidized bed granulation/firing furnace, the clinker is discharged from the fluidized bed granulation/firing furnace (14) through a gas dispersion plate (22) or through a clinker drop port (26) disposed on the extension of the gas dispersion plate (22) in a radial direction, the open area of this drop port (26) is adjusted by a gate (34) so that a difference pressure of the fluidized bed (18) becomes constant, air for classifying and cooling the clinker is blasted into a discharge shoot (28) connected to the drop port (26), the blast air quantity is regulated so that an air velocity blown out from the drop port (26) is different from an inflow air velocity through a nozzle of the gas dispersion plates (22), and the clinker is introduced into the cooler (16) through air-tight discharge means (30) positioned below a classification/cooling air blast position.