US2187922A - Device for curing and cooling burned materials in rotary kilns - Google Patents

Description

Jan. .23, 1940. c, T, WEST Er AL DEVICE FOR OURING ANO COOLING BURNED MATERIALS IN ROTARY xILNs 2 Sheng-sheen` Filed July 29, 19x39 wf., M5 OW T N Jan. 23, 1940.

c. T. WEST ET A1.. 2,187,922 DEVICE FOR CURING AND COOLING BUNED MATERIALS IN ROTARY KILNS Filed July 29, v1939 2 Sheets-Sheet 2 l 30 z8 j f" I f I l 27 36 i; *'36, 35 i CABLE-70N Z' VV'ST, *M/cHAf-.L Tief-SHOW,

Oct. 10, 193%. J. Q. SHERMAN fZZ MANIFOLD MATERIAL PACK Original Filed Sept, 28, 1931 5 Shee'tS-Sheeft 3 Patented Jan. 23, 1940 DEVICE FOR CURING AND COOLING BURNED MATERIALS IN ROTARY KILNS Carleton T. WestyGlendale, and Michael Treshow, West Los Angeles, Calif.,'assignors to Monolith Portland Cementv Company, a lcorporation of Application July 29, 1939, serial No. 287,318 7 claims. (o1. 263-433) u r 'Ihrev present .invention relates to the curing or cooling ofcement clinker or other burned productsA of a similar, nature in rotary kilns before they' have beendischarged from the kiln.

In present devices of this `character it has been common practice :to build into the walls of the kilnair ductszor passagesv through which cool airis discharged into the kiln during the revolving `of the'kiln. Irl-devices of this kind the air is discharged inwardly through the clinkers resulting in blowing-into the kiln fine particles of burned` material. Another disadvantage of such common practice is that the clinker in that part ofthe kiln being cooled is exposed to the heat from the walls of the upper part of the kiln thereby retarding the cooling operation and resulting in a discharge of the clinker at an undesirable high temperature.

It is an object ofthe present invention to provide a device by means of which cool air or gases may be directed ontothe surface of the clinker in the kiln and in accomplishing `this object a portable blower is provided which is inserted into the open discharge end of the kiln and so arranged that it may be readily adjusted in best results are obtained by directing the airor.

gases against the 4clinker as it is carried upwardly-on the inner vWall or surface of the upwardly moving side of the kiln and upon which the clinker falls back or rolls back to the bottom of the kiln. y

In common practice the air supply structure being built into the vwalls of the kiln, inthe 'i event that such structure becomes out of order .it is necessary to temporarily stop the kiln until A further object'of the invention is to provide v a cooling device for rotary kilns so arranged that such device forms a shield for the cooling zone Hfrom the hot'walls ofthe kiln.

Other objects and advantages will appear here-i` ing our invention with the discharge end of thev device extending vinto the discharge end of a' rotary kiln;

Fig. 2 is an enlarged elevation of the cooling device shown in Fig. 1, a portion of the air con-'-y duit being broken away; f .l

3 is an enlarged end view of the Vdevice shown in Fig. 2 looking in thedirection of the y arrows shown in that gure;

Fig. 4 isy an enlarged sectional view on line 4; f Fig. 2;

Fig. 5 is an `enlarged sectional View on line 5--5' of Fig. 2; and

Fig. 6 is a sectional view on line 6.-6 o fl Fig. 5;

with an opening l5 through which a tubular air supply member or conduit generally indicatedat.

I5 is inserted into the discharge end of the kiln as shown in Fig.` 1. The tubular member i6 .is preferablyV formed of two pipe sections I'l and I8, the section ri8 vconsisting preferably of 'a heat resistant steel having a closure plate i9 at the discharge end of such section.v The sections Il and i8 at their adjacent ends are preferably anged, such flanges being bolted or otherwise secured together as indicated at 2i). The other end of the section Il is also closed by a plate 2| bolted, to the flanged end of such section. The plate ,2l may be removed for inspection and cleaning purposes. 22 designates a branch formed on the section il to which is secured the end of an air pipey or hose, indicated at 23 in Figure 1, through which air is supplied under pressure to the tubular member I5. The tubular member l5 is mounted upon a car diagrarnmatically shown at 25 provided with wheels 26. Extending upwardly from the car 25 are two standards 2l each provided at their upper ends with a ring 28. Tlf-.e tubular member IS eX- tends through the rings 28' land is .adjustably supported therein in the following manner: The portion of` the ktubular member l5 within. the rings 28 is provided with sleeves 29 welded or otherwise secured thereto which reinforce the tubular member at such points for engagement of supporting devices mounted'u'pon the rings 2S.v These supporting devices consist of plates 30 'and 3l which engage respectively the upper andl lower surface of the sleeves 29, such plates beingmounted on the ends of threaded rbolts l32 vmounted in threaded' engagement with the rings 28. By this varrangement the tubularmember is supported in the rings 28 so that by proper adjustment of the bolts the discharge end of the tubular member may be raised or lowered as desired. Engaging the opposite sides of thesleeves 29- arebolts 34 which are mounted in threaded y The discharge end of the kiln is enclosed by a wall |14 provided ia n engagement with the rings 28 and by means of which the hollow member may be swung laterally intoadjusted position. For the purpose of rotatively adjusting the hollow member, arms or straps indicated at are welded or otherwise secured to the hollow member as shown in Figure 4. The lower ends of the straps 35 extend downwardly and are joined by a block 36. 3l designates a bracket secured in any suitable manner to the standard 2l at the rear end of the car. Mounted in threaded engagement with the bracket 31 are bolts 38, the inner ends of which engage the lower ends of the straps 35 so that by relative adjustment of the bolts 38 the lower ends of the straps 35 may be moved laterally with the resultant rotative movement of the hollow member I6.

Welded or otherwise secured to the inner end of the tubular member i6 are a series of nozzles or air discharge boxes 40. Each of the nozzles 40 comprise side walls 4i, end walls 42 and multi angular bottom walls indicated at 43. Certain of the walls of such bottom as indicated at are provided with air discharge openings 46 which are so arranged as to direct the air discharged therefrom against the clinker as it falls back upon the upwardly moving inside surface of the rotan7 kiln. Air is introduced into the nozzles 40 through perforations or openings 48 formed in the tubular member I5. For the purpose of assisting in breaking up the clinker should large lump of clinker be formed, the side walls 4| extend downwardly beyond the bottom of the nozzles as indicated at 5D forming flanges which upon engagement with the clinker tends to break the same. A similar flange 5l is formed on the nozzles intermediate the side walls for the same purpose.

60 designates the burner for the kiln which may be of any suitable type for burning gas or other fuel.

It will oe easily recognized from the above description that a tubular air duct or member mounted as above described may be moved by means of the car so that the discharge end of the hollow member is extending into the kiln to 'the desired position, as shown in Figure 1. Air

supplied through the pipe connection 23 is discharged from the nozzles against the clinker when the same is rolling back or at the bottom of the kiln. By the adjustment of the position of the hollow member as heretofore described it is apparent that the nozzle may be brought in position to discharge air or gas against the clinker on such portions of the kiln as may be deemed advisable for the best results. Further, the projection of the hollow member into the kiln over the portion of the clinker being cooled forms a barrier or obstruction between the cooling zone and the heated upper walls of the kiln. The clinker after passing under the nozzles is discil'arged from the end of the kiin into a pit designated at El from which it is removed in the usual manner to the grinding mill.

While we have particularly described our invention as applied to the use of air in cooling clinker it is apparent that the same is particularly adaptable for the purpose of introducing various gases for the chemical treatment of the clinker, as for instance, the introduction of natural gas to combine with the oxygen in the clinker thereby producing a substantially lighter colored clinker. In such cases other cooling means are necessary.

What we claim isr' l l 1. In combination with a rotary kiln, means for introducing air into the discharge end of the kiln comprising a conduit having its discharge end extending into the kiln, discharge nozzles on said conduit, and means for mounting said conduit for rotative and angular adjustment.

2. In combination with a rotary kiln, means for introducing air into the interior of the kiln at its discharge end comprising: a conduit extending longitudinally into the discharge end of the kiln and nozzles on said conduit, said nozzles having angularl faces with discharge openings in said angular faces.

3. In combination with a rotary kiln, means for introducing air into the interior of the kiln at its discharge end comprising: a portable air conduit extending longitudinally into the discharge end of the kiln, said conduit having air discharge openings near its inner end, a car, and means on the car for supporting said conduit.

4. In combination with a rotary kiln, meansfor introducing air into. the interior of the kiln at its discharge end comprising: a portable air conduit extending longitudinally into the discharge end of the kiln, said conduit having air discharge openings near its inner end, a car; means on the car for supporting said conduit, said supporting means comprising standards on said car, hollow receiving members for said conduit on said standards; and adjustable means mounted on said hollow members engageable with and supporting said conduit.

5. In combination with a rotary kiln, means for introducing air into the interior of the kiln at its discharge end comprising: a portable air conduit extending longitudinally into the discharge end of the kiln, said conduit having air discharge openings near its inner end, a car; means on the car for supporting said conduit; said supporting means comprising, standards on said car, rings supported on said standards through which said conduit is extended, adjustable means on said rings engageable with the upper and lower portions of said conduit and adjustable means on said rings engageable with the sides of said conduit.

6. In combination with a rotary kiln, means for introducing air into the interior of the kiln at its discharge end comprising: a portable air conduit extending longitudinally into the discharge end of the kiln, said conduit having air discharge openings near its inner end, a car; means on the car for supporting said conduit, said supporting means comprising standards on said car; rings supported on said standards through which said conduit is extended, adjustable means on said rings engageable with the upper and lower portions of said conduit; adjustable means on said rings engageable with the sides of said conduit; arms on said conduit extending downwardly therefrom, a bracket on one standard, and adjustable means mounted on said bracket engageable with opposite sides of said arms.

'7. In combination with a rotary kiln; means for introducing gas into the kiln comprising: a conduit extending into the discharge end of the kiln; and a series of gas discharge members on said conduit comprising boxes having multi angular outer walls with discharge openings therein, said conduit having discharge openings into said boxes.

CARLETON T. WEST. MICHAEL TRESHOW.

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