US2019179A

US2019179A - Rotary kiln and cooler

Info

Publication number: US2019179A
Application number: US714249A
Authority: US
Inventors: Johan S Fasting
Original assignee: FLSmidth and Co AS
Current assignee: FLSmidth and Co AS
Priority date: 1933-03-09
Filing date: 1934-03-06
Publication date: 1935-10-29
Anticipated expiration: 1952-10-29

Description

Get. 29, 1935. J 3, ASTING 2,019,179

ROTARY KILN AND COOL-ER Filed March 6,. 1934 3 Sheets-Sheet 1 Get. 29, 1935. J. 5. FASTING ROTARY KILN AND COOLER 3 Sheets-Sheet 2 Filed March 6,. 1934 jW VENTOR J. s. FASTING 2,019,179 ROTARY KILN AND COOLER Filed March 6,. 1934- 3 Sheets-Sheet 3 Oct. 29, 1935.

treatment. Rotary kilns have Patented 0a. 29, 1935 2.01am no'rsnr mm AND c'ooma Johan S. Fasting, Valby, mark. asslgnor to F.

York, N. Y a corporation of Application March Den- Co., New New Jers y near 00 L. Smidth &

6, 1934, Serial No. 714,249

Great Britain 9, 1933 3 Claims. (Cl. 2631-32) This invention is concerned with the cooling of cement clinker, hmestone,

nodulized ores, etc..

which have been treated in rotary kilns and must be cooled before they are subjected to further extended beyond the zone of in such extension have been through .which cooling air is sometimes been heat treatment and formed with grates admitted while the hot clinker or other material .passes over the grates to the outlet end of the structure. Kilns have also been-provided with cooling drums surrounding the end portion of the kiln into which the material treated is directed from the kiln and from the ends of which the clinker or other nialterial, cooled by the passage of air through the drums, is discharged. Instill another arrangement the hot clinkeror other material is discharged from the separate chamber below the therewith by a vertical passage,

kiln into a. cooler located in a kiln and connected through which the hot clinker from the kilndescends into the cooler. It is usual in such arrangements to conduct the air,.which has been heated through contact with the hot clinker or the kiln to support combustion in the kiln. .Such prior arrangements involve one or another of thegreater weight of the end pordisadvantages of other material, into tion of the kiln, great strength and stability re- 'quired for great height or width with corresponding cost of tenance, inconvenience in ation, and the giving up manufacturing plant. By

the support of the kiln, and space of occupied by the apparatus,

installation and maininstaliafio n and opermuch space in the I the present invention it has been sought to overcome all of these disadvantages and in accordance therewith there is placed just below the outlet end of the kiln a grate or gas permeable support upon which the hot clinker or other material is discharged directly from the outlet end of provided for the distribution on the support in a the kiln, means being of the hot material layer of substantially uniform thickness, for the discharge of the cooled material from the support and for the supply of cooling air to pass through the support and the material thereon and the conduct the kiln to support of the air so heated into combustion therein. The invention will be explained more fully hereinafter with reference to the accompanying drawings in which are illustrated several embodime. \ts thereof, and in which: Figure l is a view,

partly in outline and partly in longitudinal vertical section, of an apparatus in which the invention is emb rotary mm being also shown.

odied, a portion of a Figure 2 is a view in on the plane indicated Figure 1.

- 3isaviewsimilartorlgureLbutshowing a longitudinal grate as a substitute. for the stationary or gas permeable support shown in Figure 1.

Figure 4 is a view in transverse vertical section on the plane indicated by the broken line H of Figure 3. 10

Figure 5 is a view generally similar to Figures 1 and 3, but showing the substitution of a transverse moving grate or permeable support for the stationary support shown in Figure 1.

Figure 6 is a view in vertical on the plane indicated by the broken line 6-6 of Figure 5.

In the construction illustrated in Figure 1 a rotary kiln i is shown as extended into a cham ber formed by a. non-rotating hood or casing 2 g and below the outlet end of toward the .upper or feed end thereof is a grate or gas permeable support 3 upon which the hot 'clinker or' other material is discharged from the outlet end of for distributing the material on the support 8 in a layer of uniform thicmess. In this instance, the support 3 being stationary, the distribution and movement of the material is accomplished by suitably formed scoops, or shovels c, B, as they so may be called, which revolve withthe kiln. Preferably these shovels are carried by a circular shell i e which surrounds the outlet portion of the. kiln and is spaced therefrom, being carried by radial, longitudinal partitions ii. 7 which form longitudinal channels and end at the line ii=, leaving an ular channel H permit free circulation of cool air through the space between the min and the 'shell' and the shovels d, b are thus prevented from being overheated. 4,0 The proiecting shovels ii are shown as scoops by which the material is transferred across the gas permeable support 3. while the shovels are shown as discontinuous flights by which the material is stirredas it rests upon the support and by which it 45 is moved toward the upper or the supp rt; Also carried by the shell are plows t, which serve to bring the material from the bottom to the top of the layer as it rests upon the support. 'ifhese plows are shown as carried by a 5 resilient arm 6 the movement or which is restrained by linkage 6". Lumps of material which are too large may be removedthrough an opening I in the casing or they maybe broken up in their passage between the edge of the kiln and an inthe kiln and extended transverse section 15' direc ly the kiln. Provision is made 25 These partitions 3s shell ID, or the escape of air from the chamber if air is supplied through the conduit-l2 under pressure. The gas permeable support 3is preferably concaved somewhat to conform to the path of movement of the scoops or shovels and plows as they revolve with the kiln.

In the embodiment of the invention shown in. Figures 3 and 4 the kiln l is shown as extended into a casing or hood 2, asbefore, while the gas permeable support is shown as an endless traveling grate mounted on rollers l4, 15 which may be driven by any suitable means not'n'ecessary to be shown. In this instance the kiln is shown as provided with radial blades] which serve to distribute the material transversely on.

the support 3 while the discharge of the cooled material through the outlet 9 is,accomplished by the continuous movement of the traveling grate. Cool air is supplied to the chamber 2 below the gas permeable grate from any suitable source through a conduit l2 and escape of the air after it has passed through the traveling grate and the material thereon is retarded by the provision of a sealing ring l3. applied to the kiln I. In this arrangement the endless grate is shown as tilted somewhat in order to promote the distribution of the material thereon;

In some cases it may be preferable to provide for the discharge of the cooled material laterally. An arrangement suitable to accomplish this is illustrated in Figures 5 and 6 in which the kiln l is shown as extended into the hood or casing 2 and as .provided with radial blades 4'. The

gas permeable support 3 in this instance also an endless traveling grate, is disposed within the chamber 2 transversely with respect to the axis of the kiln, and may be supported on rollers I U and li to which motion'may be imparted by any suitable means'not necessary to be shown. Cool air is-admitted to the chamber 2 below the gas permeable support from any suitable source as through a conduit I 2 In this embodiment of the invention the material is discharged upon the traveling grate or support, and is distributed by the radial blades 4 secured to the kiln and the 5 continuous movement and discharge of the material is accomplished by the traveling grate in its movement.

It will be understood that various changes in details of construction and arrangement can be 10 made to suit diflerent conditions of use and that, except as pointed out in the accompanying claims, the invention is not limited to any of the particular structures shown and described herein.

Iclaim as my invention: l5

1. The combination with a rotary kiln, of a hood forming a chamber at the outlet end of the kiln, a gas permeable support in said chamber upon which the hot material is discharged from the kiln, shovels carried with the kiln ex- 20 ternally to distribute the material on said support, and means to cause cooling air to pass through said support and the hot material thereon and through said chamber into the kiln.

2. The combination with a rotary kiln, 01 a 26 hood forming a chamber at the outlet end of the kiln, a gas permeable support in said chamber upon which the hot material is discharged from the kiln, shovels on the outside of the kiln to distribute the materlal on said support, said su'p- 80 port being concavedto conform to the path of movement of said shovels, and means to cause cooling air to pass through said support and the hot material thereon and through said chamberinto the kiln.

3. The combination with a rotary kiln, 01" a hood forming a chamber at the outlet end of the kiln, a gas permeable support in said chamber upon which the hot material is discharged from the kiln, a circular shell carried with the kiln 40 and spaced therefrom, the space between the kiln and theshell permitting circulation of cooling air within the shell, shovels carried by the shell to distribute the material on the support, and means to cause cooling air to pass through said support and the hot material thereon an through said chamber into the kiln.

I JOHAN S. FAS'ITNG.