Powder cooler start-up aeration system
a technology of aeration system and pump, which is applied in the direction of domestic cooling apparatus, furniture, lighting and heating apparatus, etc., can solve the problems of time-consuming and inconvenien
Inactive Publication Date: 2007-12-13
F L SMIDTH & CO AS
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- Abstract
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Benefits of technology
The present invention provides a system for starting-up a vertically situated material-containing cooler from a crash stop without the need to empty the cooler of its contents. The system uses compressed gas, such as air, to fluidize the material at the bottom of the cooler and allow it to be started by normal methods. The system includes an air distribution system with nozzles placed at the bottom of the cooler that are in intimate contact with the inner bottom floor. The nozzles are connected to individual air delivery lines that bring compressed gas into regulators to control the pressure. The system can be used in cement plants and other industrial settings where the cooler needs to be started from a crash stop.
Problems solved by technology
Typically the cooler has to be partially or completely emptied before the rotor can spin a procedure that is inconvenient and time consuming.
Method used
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Embodiment Construction
[0015] With reference to FIG. 1, there is depicted a cooler 10 to which the present system can be advantageously adopted. Material to be cooled enters cooler 10 through inlet 1. Rotating screw flights 2 driven by a motor (not shown) convey the material upward to material outlet 3 while flinging the material outwards, where it comes in contact with the inner surface of the cooler, which is cooled by water in conduits (not shown) which are distributed evenly over the outer surface of the cooler. Cooling water flows from water inlet 4 through the water conduits to water outlet 5 by gravity.
[0016] The cooler stands on supports 6. The air distribution system 7 of the present invention will be introduced adjacent to the bottom perimeter of the cooler, and will direct compressed gas up through the bottom floor 8 of the cooler. The gas may be cleaned and dried compressed plant air.
[0017] With reference to FIG. 2, displayed is the piping manifold which will be placed underneath cement cool...
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A method of starting a vertically situated cylindrical cooler for powered material such as cement within which material to be cooled moves upward through the cooler by being propelled by rotatable spiral flights. The method is advantageously used when the cooler, because of a crash stop, is prevented from starting normally because of an excess of packed material located at its bottom, thus preventing the spiral flights from rotating. According to the method of the invention, a compressed gas is introduced into the bottom portion of the cooler in a quantity sufficient to aerate the packed material. Once the material is sufficiently aerated the spiral flights are able to be rotated, thereby propelling the material upward through the cooler.
Description
BACKGROUND OF THE INVENTION [0001] Powder coolers are commonly utilized in the production of cement. [0002] One type of cement cooler is a stationary, vertically upright essentially hollow cylindrical cooler. Such a cooler is typically a steel tank that cools on an indirect cooling basis. The cooler can be utilized to cool cement powder after it comes from the grinding process, such as from a ball mill, but can also be used for cooling other types of pulverized material such as, for example, lime, gypsum, chemicals, food products and various ores. [0003] In such cylindrical coolers material to be cooled is introduced into the interior of the cooler near the bottom of the cooler and is moved upward-through the interior of the cooler to a material outlet located near the top of the cooler by internal rotating spiral, i.e. screw, flights mounted on a framework attached to an internal vertical steel rotating shaft. The centrifugal action of the rotating flights also serves to thrust the...
Claims
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IPC IPC(8): F25D31/00
CPCF27D15/0286
Inventor MOSENG, KATHLEENSZAZDI, JOHN S. JR.
Owner F L SMIDTH & CO AS