MX2010014535A

MX2010014535A - Method and cooler for cooling hot particulate material.

Info

Publication number: MX2010014535A
Application number: MX2010014535A
Authority: MX
Inventors: Alexander Flavio Tokman
Original assignee: Smidth As F L
Priority date: 2008-06-26
Filing date: 2009-05-15
Publication date: 2011-02-22
Also published as: RU2011102675A; DE112009001569T5; CN102124294A; WO2009156227A1; US20110146946A1; BRPI0914725A2

Abstract

A description is provided of a method as well as a cooler (1) for cooling hot particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln (3) for manufacturing cement clinker whereby the hot material from the kiln (3) is directed onto a grate (21) in a cooler (1) where cooling gases via at least one cooling gas duct (28) are directed through slots (20) in the grate for cooling the hot material and where compressed air can be injected into the material on the grate (21). The method as well as the cooler is characterized in that compressed air is injected into the cooling gas duct (28). It is hereby obtained that the compressed air which is injected into the cooling gas duct (28) will operate as a non-return valve which will ensure that compressed air is injected into the material on the grate (21). This is due to the fact that the mass flow inertia and the dynamic pressure of the compressed air being injected into the cooling gas duct (28) will prevent a backflow of the compressed air into the cooling gas duct (28). The blanking-off of the cooling gas duct (28) thus achieved will further prevent clinker dust from falling through the cooling gas duct.

Description

0 AND COOLER TO COOL PARTICULATE MATERIAL Field of the invention The present invention relates to a hot particulate material which has been heat-treated in an industrial furnace, such as to rotate to make cement clinker, the hot material of the furnace being directed in a cooler where the gases are cooled. s of at least one refrigerant gas duct, ds of slots in the grid to cool the nte and where the compressive air of the grid can be injected. The invention also relates to carrying out the method.

A cooler of the above-mentioned kind of EP 1 774 236, wherein the compressed air is that the valve arrangement is a substantially mobile one that can wear out rapidly when exposed to compressed air, consequently giving rise to a tives.

It is the aim of the present invention to provide a method, as well as a cooler for the hot particulate with which the aforementioned method is eliminated.

This is achieved by a cooler mentioned in the introduction and that compressed air is injected into the gerant duct.

By means of the present it is achieved that imido which is injected into the refr gas duct as a check valve which will ensure imid that is injected through the gerant duct is directed through the slots in the material deposited on the grid. .

Theoretically, the compressed air can be injected with refrigerant gas at any angle to the central line of the gas pipe. In order to achieve the best effect, the compressed air in the refrigerant gas duct with a capacity that is parallel to the central line of the refrigerant and pointing in the direction h ia, which means that the air must be injected with an angle less than 90 ° relative to the refrigerant gas line. It is preferred that it be injected at an angle of less than 10 °, preferable gulo of 0 ° relative to the centerline of the gentine duet. ia, and takes them down to trapez. However, it is preferred that compressed gas be injected through the refrigerant duct to subsequently through the slits ia.

The cooler, to carry out the method with the invention, comprises a grill and support hot material from an oven, the refrigerant gas that is connected to the rails to introduce refrigerant gases into the nte and a compressed air system. for injection into the material on the grid and because it comprises means for injecting into the refrigerant gas duct.

It is also proposed that the cooler buy s to inject compressed air into the material cooler according to the invention.

Detailed description of the invention Figure 1 shows a 1-sided cooler in direct extension of a cement clinker rotary kiln. The cooler comprises inlet 4 and an outlet end 5. The valve also comprises a screen bottom to support the clinker 12 for injecting refrigerant gases through the clinker through a compartment in greater detail, the slots in the grid 11, as well as a number of scraper elements of a drive mechanism not shown can be traversed back and forth in the direction of the length so that the clinker moves from the former side of the cooler to its outlet end. .

The inlet grid is mounted in a certain inc angle to the horizontal plane in order to promote the clinker through the inlet cooler, the cooler also compressor 23 to inject refrigerant gas through a compartment 24, the ducts gerant 28 and the grooves 20 in the grate include a separate compressed air system having compressed air and a number of tubing to inject compressed air into the material on the infeed. Tank 25 pressurized in a native can be constituted by a vent As illustrated in Figures 1 to 3Each air injected compressed air into the inlet material is connected to a lightening duct 28, which causes the air to be injected co 90 ° relative to the centerline of the gerant duct to ensure that the compressed air has a velocity of it is parallel to the refrigerant gas line 28 and points to the grid 21. In the mode shown in the F compressed air, it is injected at an angle immedi- ately 30 ° relative to the centerline of the refrigerant 28, while the air The preferred compressor shown in Figure 2, is attached to the center line of the refriger gas duct During normal operation of the compressed air cooling is closed by means of the, such as a solenoid valve. In interval tud can be predefined or specifically nformidad with the prevailing operating conditions of the compressed air system, causing that it may be desirable to inject air co menté in selected areas of the grid in or both, the cooler can comprise a valid) , such as a solenoid valve, in each compressed area that communicates with the grid.

The compressed air can also be injected from other pipes or ducts, not shown, on the grate subjected to the injection if compressed in the refrigerant gas duct 28 to generate the static pressure between the gerant 21 and the bed of material 2 required. r temporarily the material of the grid.

It is noted that in relation to this method known by the applicant for carrying out the aforementioned invention, it is the result of the description of the invention.

Claims

CLAIMS The invention having been described as before as property contained in the ndications: 1. - A method for cooling material for which has been subjected to treatment by industrial lime, such as a rotary kiln for cement uer, by which the furnace material is directed on a grid in a coolant gases through the ore of refrigerant gas are guided through the range to cool the hot material and where imido can be injected into the material on the strand because compressed air is injected into the refrigerant. 4. - A method according to any of the first or second designations, characterized in that it is injected at an angle OI less than 10 ° relative to that of the refrigerant gas duct. 5. - A method according to any of the 1 or 2 ndications, characterized in that it is injected at an angle a of 0 o relative to the refrigerant gas line. 6. - A chiller for carrying out the mrmity with any of the claims in a grid to receive and support of an oven, at least one gas duct refr is connected to the slots in the grill to discharge refrigerant gases to the hot material of compressed air for injecting compressive air onto the grid, characterized in that