US1789697A - Pulverized-coal-burning locomotive - Google Patents

Description

2 Sheets-'Sheet 1 V. Z. CARCRIST F i1ed March 6, 1925 PULVERIZED COAL BURNING LOGOIIOTIVE Jan. 20, 1931 INVENTOR Zuur/aldi;

y- MW A TTORNE V3 Jan. 20,/1931. V. z. cARAcRlsTl 1,789,697

PULVERIZED COAL BURNING LOCOMOTIVE Filed umn 6, 192s -2 sn'nwsneet s l a a f i INVENTOR @WM/ffm 151x/v "/"Uf/un/ A TTORNEYS Patented Jan. 20.1931V lUNITED .STATES 4,PA'rlzN'r v01u-"lau j VIBGmUB Z. CBACBIBTI, 0l' BBONXVILLE, NEW YORK, ASSIGNOR, BY MESNE As- BIGNIENTS T VIBGINIUS Z. GABACBISTI, 0F NEW YORK, N. Y.

appunti@ mea man 0,.-1925. semi no. 13,503.

This 'invention relates to locomotives burnifllrlgl pulverized coal or other ifinely divided Alocomotive fire box, because of clear- 6 ances 'and other practical limitations, is of comparatively small size.

One ofthe objects of my invention, therefore, is to o Y of travel for the 'fuel and flame within the llirebox. v`

Another object is to minimize diiculties encountered with the closin or honeycombing over of the ilues b regxse matter.

Still other objects o the invention-'are to l# insure and remote ro r andrapid combustion wit the x; and toobtain high boiler, efficiency and evaporation.

. till another object of the invention has to do with' the extension of the life of such refractories as may be needed within the box .for baming and combustion purposes. this connection the duty imdposed bricks, articularly where. e fuel 1s burned in ow ered form, is very severe. J 25, e foregoing together with such other objects as v-may eremafter appear, or are incident to my invention, are realized by a construction which I have illustrated in preferred form in the accompanying drawings, wherein' Y j Fig.- 1 is a longitudinal section thru a locomotive lire box embodying mv invention.

Fig. 2 is a half section talen on the line 2-2 and a half section taken on the line 2a-2a of Fig, 1;

Fig. 3 is a section taken on the line-33 of Fig. 1; e Fig. 4 is a section taken n the line 4-4 o f Fig.1;and, 4 Fig. 5 is a section similar to Fig. 3 illustrating a modification of the invention.

,Referring now to Fig. 1, there is shown the usual form of inside and outside fire-box, re-

spectively comprising zthe ue sheet 7 the d so as to provide the usual water legs closed at tain maximum length u pon such I inside back sheet 8, the inside side sheets 9,'

l the bottom by the'mud ring 16.I Theiues v door 19.

Extending downwardly from the box,

from the region of the mud ring1 16 is a lire f' pan "A consisting of a metallic s ell member 20 lined at the sides,.rear and bottom with refractory material a. The front wall of the fire aan is in substantial alignment with the insi e throat sheet 10 and it is covered by a refractory wall b extending'l upwardly to the circulation tubes 21.

Thecirculation. tubes 21 connect the front and rear water legs, rising upwardly and rearwardly from the front water leg. These tubes are spaced much more closely than is customary in locomotive practice where, at

In most, four such tubes are used.

Carried by the tubes 21 and extending from the front water leg rearwardly a portion of the length of the lire box, is a refractory arch or bale B, the construction of which will be later more fully described.

Extending forwardl and upwardly from the lower portion of t e rear water leg is a set of circulation tubes 22, the upper ends of which are expanded into the crowm sheet 11 at about midway of its length. Both sets of tubes 21 and 22 are bent so as to provide more readily for expansion'and contraction. The

tubes 22 intersect with the tubes 21, passing therebetween, at a point about midway of the length of the .fire box and above the middle point in its'height. The tubes 2 2 carry an arch C of refractory bricks to be hereinafter described.

It will be observed on inspection of Figs.

1, 2 and 3 that the tubes 21 have longitudinal fins 23 secured on opposite sides thereof and extending part of the distance from the front waterle to the rear water le'g. These fins are refe ably welded on and are of such widt as will enable them to conduct heat to the tubes without burning olf. The side i tubes 21 havelonly one such fin.

The arch B is composed of center brlck 24 and wing brick 25.' The center bricks are somewhat ,T sha ed and, by virtuek of the close spacing of t e tubes 2l, are of relatively small dimension, this dimension being fur- `ther decreased in the web portion of the bricks the tubes and fins not only because the latter' directly shield the bricks, but also Ibecause they absorb heat therefrom. The cooling effect of the tubes and fins on the tongues or vertical legs of the bricks is such that they will not wear out rapidly. The wing bricks are protected by the cooling effect of the sideslieets and the side tubes.' Since these bricks do not wear out as rapidly as the center bricks, they do not need protection "to the same extent.

The tubes 22 are similarly provided with fins' 23, such fins terminating at about the point of intersection of the two sets of tubes.

The rear arch C extends from a point approximate the rear end ofthe bale'or arch B, a portion of the distance toward the back water leg. This archconsists of center brick 24, such as above described, the wing brick being omitted. The center bricks are held against sliding longitudinally of the tubes 22 by virtue of spacer bricks 26 which are socketed so as to rest on topof the tubes 22, as indicated in Figs. 1 and 2. These spacer bricks engage and support the lowermost center brick of the arch C as indicated in Fig. 2. y

For the reasons alreadypointed out it will be apparent that all of the bricks of the rear arch are protected from the action of the flames and present but a small total area to the Haines.

' By virtue of the construction of the rear arch, a passageway 27 exists at, each side thereof as well as a plurality of passages between the tubes and the lowermost end of the arch C and the water leg. The arches B and C considered together form an inverted v air being supplied to such inlets by rvirtue V-shaped arch, the forward leg ofwhich abuts against the throat sheet 10 and the rear leg of which terminates shortof the sheet 8.

The pulverized coal is supplied from the tender and led to one or more burners D by the pipe or pipes 28, air being preferably used as the carrying medium. Additional air is drawn into the burner or burners and the burners discharge thru the rear wall 29 of the ire box. nimediately above the point of fuel introduction, I provide an arch 30. The side walls of the fire pan are provided with two or more rows of auxiliary air inlets 31,

of the circumferential duct 32 which may be formed in any desired manner and which 1s providedr with a damper controlled inlet,

notl shown, whereby control of the air- Suipply to the aum'liary inlets may be controlled.

Assuming that the lire box is hot enough upwardly toward the Aarch B by which the fuel and flame stream is guided toward the rear, part of the dame passing upwardly thru the passages 27 at the sides of the arch C and part passing overv the rear end of the arch C. The Haine then bends and travels forwardly toward the ues. As the fuel enters and as the fuel and flames traverse the lire pan, the fuel r particles and the burning gases are continuously brought into contact with fresh air .and similarly in its vreverse bend, the fuel and flame stream draws upon the air induced thru the inlets 31. The effect of the arches, the tubes, and the 'various passages is to promote effective mixture.

The forward wall b is subjected to scouring action and is therefore made quite substan tial. The arches B and C are protected in the manner already described from that portion of the Haine' therebeneath'. The upper surfaces Aof the arches radiate heat 'to the flame thereabove, but since combustion hasV been already well carried forward and since a large portion of the refuse particles, particularly the heavier ones, have already been tangentially discharged from the fuel and llame stream there is no scouring action of any con-l sequence on the upper faces of the arches.

The fire pan and the arches cooperate to radiate heat to a central locus, insuring roper combustion and overcoming the chllling effect of the side sheets of the fire box.

The tubes 21 and 22 are in the nature of screens from which the fuel and flame stream must pass and they, of course, absorb a large quantity of heat, in Aconsequence of which whatever refuse particles are carried over the' arches forwardly, are cooled to the extent such as minimizes honeycombing or bridging effects over the fiues. v

The refuse which is formed and deposited' in the fire pan'runs to the discharge hopper It will be seen from the foregoing that I have provi'dedan effective arrangement for subjecting the fuel to radiant heat and for supplying the fuel with air as combustion proceeds and for protecting the baflles as well as the flues, at the same time securing the maximum length of flame travel, and a rfect mixture of fuel and air, whereby comustion 'is completed within the fire box.

In the arrangement of Fig. 5 the fins are omitted, reliance being placed upon the tubes alone for the protection -of the refractories.

In all constructions it will be seen that even if is very little liability of any of such brick` being dislodged.

Since locomotives ordinarily have comparatively short runs, as compared to station- Y ary practice, there ample opportunity provided for cleaning vout,any deposits of refuse at points other than in the hopper.

The fire pan is carried from the mud ring as shown, whereby the same may be readily applied to existing locomotives. The method lof support is a convenient way for providing an air supply duct.

The zone defined by the pan, front wall and the arches may be termed a main combustion 4 space in which ignition, partial combustion and gasification take place. Here there is room for expansion. 4The remaining portions of combustion space are smaller in cross section as the gases contract somewhat because of the absorption of heat. The former region is, therefore, largely bounded by -refractories for combustion purposesand is preferably larger. Y,

I claim: 1

1. In a pulverized fuel burningr locomotive, a lire-box having rearwardly and upwardly extending circulation tubes and upwardly and forwardly extending circulation tubes crossing one another, burner means at the rear of the box for admitting fuel beneath the tubes in a forward direction, an arch carried by the first tubesand extending for the width of the box part way from the front tol the 'rear leg, and an arch carried by the second tubes and extending from the first arch part way to the rear leg.

2. In a pulverized fuel burningv locomotive, a fire-box having rearwardly and upwardly extending vcirculation tubes and upwardly and forwardly extending circulation tubes crossing one another, burner means at the rear of the box for admitting fuel .beneath the tubes in a forward direction, an arch carried by the first tubes and extending for the width of the box part way from the front to the rear leg, and an arch carried by the second tubes and extending from the first arch part Way to the rear leg and terminating substantially short of the side sheets.

3. In a pulverized fuel burninglocomotive, a fire-box having rearwardly and upwardly extending circulation tubes and upwardly and forwardly extending circulation tubes crossing one another, burner means at the rear of the box for admitting fuelbeneath the tubes in a forward direction, an arch carried by the first tubes and extending for the Width ofthe box part way from the front to the rear leg, and an arch carried by the second tubes and extending from the first arch part way to the rear leg and terminating Substantially short of the side sheets, to-

gether with a refractory fire pan below the arches.

4.`In a pulverized fuel 'burning locomotive, a fire-box having rearwardly and upwardly extending circulation tubes and upwardly and forwardly extending circulation tubes crossing one another, burner means at the rear of the box for admitting fuel beneath the tubes in a'forward direction, an arch carried by the first tubes and extending for the width of the boxopart wayfrom the Y front tothe rear leg, and an arch carried by the second'tubes and extending from the first arch part way to the rear leggand terminating substantially short of the side sheets, together with a refractory fire pan b elow the arches and means above the bottom of the pan and beneath the arches for admitting air for combustion.

5. In a pulverized fuel burning locomotive, a fire-box having rearwardly yand upwardly extending circulation tubes and upwardly and forwardly extending circulation tubes crossing one another, means for ad mitting fuel therebeneath, an arch carried by the first tubes and extending for the width of the box part way from the front to the rear leg, an arch carried by the second tubesand extending from the first arch part way to the rear leg and burner means at the rear of the box for admitting fuel forwardly beneath the arches together withoa third arch overlying the burner means and adapted to prevent short circuiting of the fuel and flame.

6. In a pulverized fuel burning locomotive, a fire-box having rearwardly and upwardly extending circulation tubes and upwardly and forwardly extending circulation tubes crossing one another, burner means at the rear of the box for admitting fuel beneath the tubes in aforward direction, an. arch carried by the first tubes and extending for the width of the box part way from the front to the rear leg, and an arch carried by the second tubes and extending from the first arch part way to the rear leg and terminating substantially short of the side sheets, together with a third arch overlying the burner means and adapted to prevent short circuiting of the fuel and flame.

7. In a pulverized fuel burning locomotive, a fire box, burner means for delivering fuel into said box in a forward direction adjacent the bottom thereof, an outlet in an upper forward portion lof the box and an ini fuel into said box ina forward direction adjacent the bottom thereof, a set ofp water tubes vin said box extending upwardly and v forwardly from the rear wall thereof, a secl throu h adjacent the rear of the jacent the bottom thereof, a set of water tubes ond set 'of tubes in said box extending rearvwardly and upwardly from the front wall thereof and separate bao means supported on the lower portion of said sets of tubes andl meeting at their upper edges, the bams associated with the upwardlyand forwardly extending tubes having an openin there- V re box, where y the fuel and flame stream is caused Yto contact serially with the lower portion of said second mentioned set of tubes, said first mentioned set of tubes and the upper portion of said second mentioned set.

9. In a pulverized fuel burning locomo` tive, a fire box, burner means for delivering fuel into said box in a forward direction adin said box extending upwardly and forwardly from the rear wall thereof, a second l set of tubes in said box extending rearward- .1y and upwardly from the front wall thereof, a an outlet above and forward of said second mentioned set of tubes and separate baie means supported on the lower portions of said sets and meetinat their upper edges, the y bale associated wit the upwardly and forwardly extending tubes having an opening therethrough ad]a.cent the rear of the re box, where y the fuel and llame stream is caused to contact serially with the lower portion of said second mentioned set, the lower ,portion of said first mentioned set, the upper portion of said second mentioned set and the upper portion of said first mentioned set, and to pass to said outlet.

In testimony whereof, Il have hereunto',

si ed m fname.

gn* VRGINIUS Z..CARACRISTI.

' messer

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