US821994A - Blast-flame furnace. - Google Patents

Description

PATENTED MAY 29, 1906 B. E. ELDRED. BLAST FLAME F URNAOE.

APPLICATION FILED APR.14, 1905.

WITNESSES: z.

ATTORNEYS UNITED STATES PATENT OFFICE.

BYRON ELDR D, or BRONXVILLE, NEW YORK, Assienoa'r'o COM-' BUSTION UTILITIES COMPANY, OF NEW YORK, N. Y A CORPORA= TION OF NEW YORK.

BLAST-FLAME FURNACE.

.To a, whom it may mm;-

Be it known that I, BYRON E. EL'DRED, a

citizen of the United States, residing at- Bronxville, in the. countyof Westchester and State of New York, have invented certain new and useful Improvements; in Blast- Flame Furnaces, of which. the following s ecification and accompanying drawings ilustrate the invention in a form which I now regard as the best out' of the various forms-in which it may be embodied.

This invention relates to,furnaces or kilns for performing calcining, roasting, cintering,

for the main flame which occupies the and similar operations .upon materials, and more especial y to vfurnaces, such as rotary furnaces; for making Portland-cement clinkers. 4

.The object of the' invention to provide an apparatus for obtaining in the kiln a'plu-' rality of distinct regions of diiierent temperature'that is, referabl a regionof moderate temperature or calcining the 'cementma'terial and a region of'higher temperature for finally fusing. the clinke'rs.- This object is performed, preferably, by em l'o. a blastflame, such as the ordinary po wd ered-coal blast,'or, if desired, a modifi'edblast-flame body of the kiln-chamber and accomplishes the-calcining or'the calcln ng'and more or less of the cintering operation, and for the final cintering or fusionof the olinkers making use of an auxiliary high-pressure aseous jet directed transversely of the main" last andaflecting a ortion onlyof the blast-current, whereby a ocal current of flame is driven against the material, producing a local temperature. This auxiliary, jet may conveniently 'be acompressed-air jet, and for the purpose of altering its direction or, the intenslty of its efiect I Specification of Letterelatent.

- Application filed April 14, 1905. R Serial No. 255,662

manner,

- material. known wa 797,506 was grantedAu Fig. 4 is a'nenlarged Patented May 29, 1906.

i 10 is the inclined rotary barrel or working chamber of the kiln with a stack 11 at thehigher end and a conveyer 12 for introducing the material to the barrelat that end, a removable head 13 at the lower end, a blastnozzle 14 supported thereon and'directed nearly axial with the'barrel, .a receptacleor bin 15 forthe powdered .coa'l, together w1th for feeding the coal to 16 connected the rear of suitable mechamsm the blast-nozzle, and a pipe with a fan-blower 29 and entering the nozzle for furnishing.,,the blastressure and more orless of .the air tor com ustion.

These parts may all beof the usual construetion and mode of operation. reason, however, of the'provisio'n of auxlhary means for creating a high local cintering tem era ture, as hereinafter described, the main ame may, if desired, be modified In a su table so as to have less than its usual 1n-' tensity of heating" effect upon the cement This may be done 1n'any'well-- or .by means of diluent stackgases, as escribed in a copending'applica 1 tion, Serial No. 57 4,47 4, on'which Patent No.

@115, 1905, Above the blast-n'ozz e 14 an auxiliary nozzle 18 is mounted on a pivot 19 and-connected by a branch pipe 20, having a flexible section, with an-air-compressor .17, whereby a high-pressure jet of air isdellvered against the main blast. This nozzle is directed downwardly toward the floor of the barrel 10 at an angle to the axis of the blast-nozzle, which angle may be changed by moving the auxiliary nozzle on its pivot. To regulate the pressure of the auxiliary et, a valve 21 is shown in the branch pipe 29, having amovable pointer 22 and fixed Index 23, and a ressure-gage 24 is shown connected with the ranch 'ipe for indicating th s pressure. Surrounding the nozzle 18 1s a concentrlc nozzle 30, connected by a pipe 31, havinga flexible section, with a second fan-blower 32, for furnishing a larger volume of alr'at a lower pressure to the auxiliary et. By-ad- .justing the quantities delivered by the comressor and the fan,

der the conditions of use,

i In the base of the stack is an opening proalong the bottomto the dis'char vided with a damper 25, which is operatedby a lever 26 from near the discharge end of the kiln, whereby the center of the main flame may with ease be moyed longitudinally to and fro in the kiln. 'Opening this damper 'movesthe flame back toward the discharge end and closing it moves'it forward toward the stack. A amper 27 on top of the stack is also shown.

In operation the material is fed to the rotary barrel glO by conveyer 12'andproceeds usefulresult is secured in the way of less destructlve eflect upon the lining of the barrel,

as well as a more efficient and economical apgllicatlon of the heat energy of the fuel. 1 The alhigh temperature required for the fusion or cintering of the cement clinkers'is furm'shed through the agency of the auxiliary jet delivered through nozzles 18 30 and actmg upon a portion only ofthe main blast-current, such portion being deflected down wardly upon the floor of'the barrel near its discharge end and roducing by agitation and concentration of t e combustlon a localized high tem erature, which makes a hard satisfactory c inker. The temperatures are thus under better control than heretofore and the heating agent more efiectively applied.

Burning out of the lining by the cinteringflame can be minimized and avoided by the control exercisedover the direction of the flame, this local flame being directed upon a portion of the floor of thebarrel which is covered by cement material;

I am enabled to employ the auxiliary jet in conjunction with the ordinary apparatus for supplying blast-flames for cement burnmg and analogous purposes, such as the powdered-coal blast, and to secure better clinker, better control of combustion, and greater economy of fuel than has heretofore been 'attame It will beseen that the two regions of combustion are adjustable relatively to each other and each inde endently adjustable longitud-inally of the kiln, the auxiliary flame by thepivotal movement of nozzles 18 30 and the main flame,which is more subject to the draft in the kiln, by adjustlmg either of the dam ers '25 27.

at I claim 'as new, and desire to secure I by Letters Patent, is Y 1- A furnace comprising a combustionchamber having .means for feeding material .auxiliary nozz e-chute 28 v in the cement-forming material, and it may,

for independently adjustin along its floor, a blast-nozzle for projecting a flame over the material in the opposite direction to the travel of thematerial, fuel and blast-current connections to said nozzle, an auxiliary nozzledirected at an angle to the axis of the blast-nozzle toward the floor of v the combustiomchamber and commanding a portion of the blast-current, means for supplying a highressure gaseous fluid to sald i; and means forv supplymg a low-pressure gaseous fluid thereto.

2. A furnace com rising acombustion chamber, a blast-nozzle directed thereinto, a receptacle for powdered'coal connectedwith said nozzle, means to sup 1y a blast-current through said nozzle, an an auxiliary jetnozzle commanding a ortion of the blast and'directed at an an lie to the axis of the blast-nozzle, said nozz e comprisin concentric pipes connected to different flui sources.

3, furnace comprising a rotary lncllned barrel, material-supplying means at the higher end thereof, a discharge-outlet at the lower end, a blast-nozzle directed into-said barrel substantially axial therewith, and an auxiliary nozzle directed across the axis of said nozzle toward the floor of the barrel, said nozzle comprising concentric pipes connected to diflerent'fluid sources.

4. A furnace comprising a combustionchamber, means for producing regions .of combustion of different intens tiestherein,

and means forrelatively adjusting said re- W gions longitudinally of the furnace.

5. A furnace comprising a combustionchamber, means for roducing-a main combustion of relatively owtem erature therein, means for producing'a loca 'combustion of higher temperature, means for adjusting one of said combustions relatively to the other and means for adjusting both, longitudinally of saii chamber.

furnace comprising a combustionchamber, means for producm a main flame and an auxiliary flamev therein, and means both of said flames longitudinally of the ,c amber.

7: A- furnace comprisin chamber having means for feeding the mate rial therethrough, a blast-nozzle at one end thereof -for supplying a main axial flame, means for supplying a local high-temperature a combustionflame in contact wlth the materials near the discharge end, and means'for relatively ads? justing said flames longitudinally' of saidv kilns. 1

g 8. A furnace] comprising a combustionchamber havin a stack at one end, ablastsaid nozzle for producing a local high temperature at the nozzle end,-and damper mechanism at the stack end for varying the position of the main-nozzle flame within the combustion-chamber. i 1

9. A furnace comprising a combustionnozzle at theot or end, means additional to chamber having a stack at one end, a blastchamber, a main blast-nozzle, an auxiliary nozzle at theother end,'an auxiliary nozzle deflecting-nozzle having outer and inner for producin' a local flame, said nozzle adpipes, an air-compressor connected with the 15 justabie in d ireotion, and damper mechan inner pipe, and a fan-blower connected with 5. ism for varying the position of the' main the outer pipe.- flame. In testimony whereof I have hereunto set 10. A furnace comprising a combustionmy hand, in the presence of two subscribing chamber, a, main blast-nozzle, an auxiliary Witnesses, the-8th day of April, 1905. deflecting-nozzle having two pipes, and BYRON E. ELDRED.

10 means for supplying fluids of different pres- Witnesses:

sures through the respective pipes. JA's. D. GRANT,

1 1. Afur'nace comprising a. combustionv CARLETON ELLIS.

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