US906194A

US906194A - Apparatus for burning fuel in furnaces.

Info

Publication number: US906194A
Application number: US35425307A
Authority: US
Inventors: Earl M Bunce
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-01-26
Filing date: 1907-01-26
Publication date: 1908-12-08
Anticipated expiration: 1925-12-08

Description

E. M. BUN CE. APPARATUS FOR BURNING FUEL IN FURNACES.

APPLICATION FILED JAN. 26, 1907.

906, 194;. Patented Dec. 8, 1908.

2 SHEETS-SHEET 1.

witnesses Q v E. M. BUNCH. APPARATUS FOR BURNING FUEL IN FURNACES.

906,194.- Patented 1360.8, 190&

' 2 sums-sum 2.

UNITED srarss PATENT OFFICE.

EARL M. BUNOE, OF FENTON, MICHIGAN.

APPARATUS FOR'BURNING FUEL IN FI IRNAoEs.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed January 26, 1907. Serial No. 354,253.

To all whom it may concern:

complete combustion may be secured by the fuel with the air, and

thoroughly mixing whereby when the apparatus is used in connection with a rotary or other kiln for burning Bortland cement clinker the intensity of the flame orheat may be localized at various extreme lower end of the kiln, and said flame also may be directed towards any portion of the internal surface of the kiln as well as axially thereof. v j

The invention consists in certain novelties of construction and [combinations of parts hereinafter set forth and claimed.

The accompanying drawings illustrate one example of the physical embodiment 'of the invention constructed and arranged accordmg to the best of the several modes I have so far devised for the practical application.

of the principle.

Figure 1 is a side view in elevation of the apparatus showing its use in connection with a rotary kiln. Fig. 1.. Fig. 3 is an enlarged end view. Fig. e shows by a view in perspective the means fer adjusting the pipes horizontally. Fig. 5 shows by a view in perspective part of the togglelever mechanism for; ad usting a pipe vertically. Referring to the several figures, the numeral 1 designates the lower portion or end of a rotary kiln which may be of any well known construction and be supported and revolved in any suitable way well'kn'own in the art; 2, a housing or hood'of a well known type supported upon wheels and having an opening upon one vertical side which in this instance receives or matches the tubular end of the rotary kiln; 3, two castings set in the wall of the hood and extending through the fire brick, indicatedby dotted-lines, each casting being alhollow truncated cone in shape and the axial lines of the two cones the cones; 6, the main points or places inwardly from the F g 2 is a top plan view of loosely journaled; 26, a fixed disposed at an angle to each other; 4, fuel discharge pipes with their ends located wlthin and slightly projecting beyond the smaller ends of the truncated cones, thus forming swivel connections with said cones; 5, re-

taining bands or rings upon the ends of the pipes for preventing their withdrawal from blast pipe connected with a blower and source of fuel supply; 7, 7, the two branches leading from the main blast pipe; 8, continuation's of the branches to the fuel discharge pipes; 9, flexible hose connectin the several pipes whereby three universal joints are provided between each branch of the main pipe and the fuel discharge pipe; 10, rods for supporting the end of the main pipe and the several branch pipes; 11, a damper located within the main pipe at its 13, a perforated lever arm; 14:,a slotted semi-circular bearing supported by the main pipe; 15, a bolt passed through the slot in the circle and the end of the lever; 16, a

a channel iron winged nut on the bolt; 17, section-at the rear top edge of the hood occupying a horizontal position; 18, a' channel ironsecured at the front top edge of the hood; 19, two channel irons secured to the ends of channels 17 and 18 and with their sections of pipe constituting free ends extended rearwardly a suitable distance from the hood; 20, a horizontally disposed Z-bar, located below the truncated cones; 21, a bent strap secured to the Z-bar; 22, two metallic barsspaced apart and with their front ends secured to the strap 21 in any way; 23, two obliquely disposed angle irons extending from the ends'of the channels 19 to the ends of the bars 22, and which support the shaft with a hand wheel; 25, a perforated block which supports the hand wheel end of the shaft and within which the shaft is blockhaving a bearing for the end of the shaft and within which't-he end of the shaft turns; 27 a movable block with. a threaded hole for the reception of the threaded portion of the shaft; 28,,two toggle levers; 29, a journal by which the meeting ends of the levers are pivoted to the movable block; 30, pivotal joints which connect the ends of the levers with the universal joints at the ends of the fuel discharge pipes; 31, toggle levers pivoted attheir meeting ends upon a bolt 82 which is pro-.

vided with a winged nut 33, as shown; 34,

75 junction with the branches; 12, the shaft; 7,

- shifted from the place A to a position at one an operating handle pivoted upon the bolt 32 at the meeting ends of the levers; 35, the

pivotal joints which unite the outer levers to the channel bars 19 in any suitable way; and 36, the pivotaljoints which unite t e lower levers to the universal joints or connections at the ends of the fuel discharge pipes. Any suitable type of blower and means for supplying fine fuel, suchas pulverized coal,

to the main blast pipe 6 may be employed and such blowers and means being well known in the art I have not illustrated or described the same. 1

The mode of operation is as follows: As-

, suming the

fuel discharge pipes

4, 4, to be in the relative positions shown by Fig. 2 and powdered fuel mixed with air to be projected fromthe discharge pipes, the two currents or streams will meet at point or place A where the fuel and air will become thoroughly coinmingled and the two currents change directions and become united to form a single current extending ina substantially I will be delivered from one of the discharge pipes than from the other, the flame will be side of a vertical plane passing through the l nes. BB. Obviously the flame can thus be shifted from side to side of the internal surface of the-kiln as occasion may demand. To change the place A of the most intense heat to a position nearer the lower end of the k1ln,.as at (1., the threaded shaft 24 is revolved, the toggle levers 28,28 operated, and the

discharge pipes

4, 4, moved apart at their free ends so the air and fuel delivere will meet at the place G.

To localize the. flame and most intense heat inwardlyat any place on the line B-B' from the lower end of the kiln the free ends of the

discharge pipes

4, 4, are moved towards each other by the toggle lever mechanism and the' currents or streams of air and fuel thus caused to meet at the desired place. When the

discharge pipes

4, 4, coincide in direction with the lines DD the place of most intense heat will be located far within the kiln at the meeting point or place of the two streams or currents of air and fuel. As previously explained in connection with the place A, the flame may be shifted from-side to side of the internal surface of the kiln from the point or place wherever in the plane of the line B--B the two currents of fuel and air may be caused to unite or meet. By the manipulation of the toggle levers 31, 31, the free ends of the discharge pipes may be moved so that the common flame will be localized at the top internal surface or bottom internal surface of the kiln, near the lower end of the kiln, as indicated by the dotted lines E and F, or it may be localized at the top and bottom internal surfaces at places some distance within the kiln.

It will be observed that each discharge pipe 4 forms at one end with the surface bounding the smaller opening in a trun cated cone casting a swivel joint, or universal joint, and that the opposite end can be moved through practically the circumference of a circle so that the current of fuel and air may be directed towards any portion of the internal surface of the kiln or axially thereof. Under some conditions it may be desirable to use a single dischargepipe thus swiveled at one end in the wall of the hood, but two such pipes are preferably employed and the currents of fuel and air or flames united to form onecurrent or flame inasmuch as by bringing the currents of fuel and air together the same are more thoroughly mixed and more .complete combustion with a greater heat results. Again, by'

bringing the two flames or currents of air and fuel together at an angle the heat may be localized near the lower end of the kiln and in this and other locations there is less tendency for the flame and heat to swiftly pass through the kiln to the stack before, theheat has been transmitted to the material under treatment.

'The advantages secured by the use of my improved apparatus in connection with burning raw materials into Portland cement clinker are obvious. With devices now in use the length of the clinkering zone is very limited and the raw material frequently passesthe zone without being thorougihly burned, under whichcircumstances the iln must be stopped and the unburned material driven back. By the use of my apparatus the clinkering zone can be brought to the lower end of the kiln or the heat elsewhere localized and the flame directed upon the material not thoroughly burned. In 'fact the point or zone of clinkering is under the control of the operator at alltimes. Furthermore, the formation of rings may be prevented or the same readily burned off when formed as the flame can be directed to any point within the lower portion of the kiln and the heat there-intensified.

From the fore oing description taken in connection with t e drawings, it is clear that -1 have produced an apparatus whereby a I do not intend to limit the scope of the invention to such specificmeans, as equivalent means may be employed to perform the same or analogous functions, for instance, the fuel discharge pipes may be bodily movable at the ends in lieu of having swiveledor universal joint connections with the two trun cated cones, a different type of flexible oint be selected, other means be used to move the discharge pipes simultaneously or successively, and. two main supply or blast pipes each having adamper be substituted for the main blast pipe with branches as herein illustrated.

lVhat I claim is:' v

1. The combination with a furnace, of a discharge pipe swiveled or uni'versally jointed atits. front 'end in the wall of the furnace and bodily movable at the rear end to positions within the arc of a circle, and means embracing a pipe universally jointed to the rear end of the discharge pipe for delivering air-and fuel to said discharge pipe.

2. The-combination with a furnace, of a discharge pipe swiveled or universally jointed at its front end and movable at the rear end; means for moving said pipe; and means embracing a pipe universally ointed-at one end to the rear end of the discharge pipe for delivering fuel and. air through said pipe to the furnace.

The combination with a furnace, of means for delivering two streams of air and fuel into the furnace so they will meet, change their directions, become thoroughly comn'lin'gled and form practically one stream;

'and means for changing the meeting point or place of the two streams within the furnace.

l. The combination with a rotary kiln, of means for delivering a plurality .of streams of commingled air and fuel against each or one another so as to. form practically one stream; and means for localizing the stream so formed at different places wi hin the in-,

terior of the kiln.

5. The combination with a rotary kiln,-of means for delivering two streams of air and fuel into the kiln so they will unite and form practically one stream; and meals for forcing the said stream to one side of the meeting place of the said two streams of air and fuel.

6. The combination with a furnace, of two movable fuel discharge pipes, means for supplying fuel and air to the pipes andrmea-ns for supporting them in different positions the two streams of air and fuel may be caused to meet at different points or places within the furnace.

' 8. The combination with a furnace, of two fuel discharge pipes angularly disposed each to the other; means for supporting the same; means for supplying fuel and air to the pipes; and means for adjusting the pipes vertically so the flame may be directed upwardly or downwardly within the furnace.

9. The combination avith a furnace, of two fuel discharge pipes; means for supplying fuel and air to the pipes; and means for adjusting the pipes both vertically and horizontally so the two streams of fuel and air delivered from the pipes will meet at a plurality of points or places within the furnace and form one stream.

10. The combination witha kiln, of two fuel discharge pipes each swiveled at one end and movable at the other end; means for adjusting the pipes to angular positions; and means for supplying fuel and air to the same.

11. The combination with a kiln, of two fuel discharge pipes angularly disposed each to the other so the streams of fuel and air will meet to form one stream; means forsupplying fuel and air to the pipes;-and meansfor delivering more'fuel to one of the pipes than to. the other, for the purpose set forth.

12. The combination with a kiln, of two fuel discharge pipes angularly disposed each to theother so the streams of air and fuel will meet, change their directions, become thoroughly commingled, and form one stream; and means for adjusting the pipes to different angular positions, for the purpose set forth.

18. The combination with a rotary kiln, of two movable fuel discharge pipes angularly disposed each to the other so the streams of air and. fuel will unite, change their directions, become thoroughly commingled, and form one stream; and means for adjusting the said pipes and holding them in relative adjusted'positions.

14. The combination with a rotary kiln, of two movable fuel discharge pipes angu+ larly disposed each to the other so the streams of fuel discharged will be united to form. one stream; fuel supply pipes joined larly disposed each to'the other; fuel supply pipes each flexibly jointed to a discharge pipe at one end and to another supply pipe at the opposite end; and means for adjusting the discharge pipes.

16. The combination with a rotary kiln,

of two movable fuel supply pipes angularly disposed each to the other so the streams'of fuel and air discharged will unite, change their directions, become thoroughly commingled, and form one stream; means for supplying fuel and air; and toggle lever mechanism for horizontally adjusting said pipes to different angular. positions.

17. The combination witha rotary kiln, of two movable fuel supply pipes singularly disposed each to the other so the streams of fuel and air discharged will unite, change their directions, become thoroughly commingled, and form one stream; means for supplying fuel and air; and toggle levi mechanism for vertically 'adjustmg said pipes to different positions.

18. The combination with a rotary kiln, I

delivery pipe; means for supplying air and fuel to the pipes; and means for moving the tions.

19. The combination with a rotary kiln, of two fuel discharge pipes each swiveled at one end in the wall of a hood or housing and discharge pipes to different angular posifiexibly united at the opposite end to a movable fuel delivery pipe; means for supplying air and fuel to the pipes; and means for moving the discharge pipes to different an- 1 gular positions.

In testimony whereof I affix my signature in presence of two witnesses.

' EARL M. BUNOE. Witnesses: V

R. B. RENWIGK, JOHN HORRELL.