US1715160A - Assiguoes oe - Google Patents

Description

y 28, 1929- A. F. CORNNER ET AL- 1,715,160

FURNACE Filed Nov. 30, 1925 4 Sheets-Sheet l May 28, 1929. A. F. CORNNER ETAL. 1,715,160

FURNACE Filed Nov. 30, 1925 4 Sheets-Sheet 2 May 28, 1929. CORNNER ET AL 1,715,160

FURNACE Filed Nov. 50. 1925 4 Sheets-Sheet 4 L I )1 I" T"ll i v J 111mm) I Patented -May 28, 1929.; l

rarer Ass 1*. scanner. Annenonee w. K. KING, or COFFEYVILLE, KANSAS, ASSIGNORS or ONE-HALF TO ROY r. OSBORN, or NEW YORK, N. Y.

FURNACE.

Application filed November 30, 1925. Serial No. 72,069.

Our invention relates more particularly to furnaces such are employed for heating boilers, oilstills and the like. In such furnaoesas heretofore commonly constructed,

the travel ofthe fiames and products of combustion from the fire box is in one direction only so that the boiler or other object heated is w unevenly heated throughout the operation, certain regions or portions thereof receiving or being subjected to the flames and gases while at, their highest temperatures and otherportions or regions thereof being subjected to the gases "only after the latter have been considerably cooled. As a result either the one portion of the boiler or the I like is overheated or the other is inelhciently heated, or both, with the result that there is rapid deterioration in the part subjected to the highest temperature while the cooler part remains in good condition and, furthermore, in the case of water boilers, there is excessive local deposition of lime and in the case of stills or boilers for oil or other organic mattert'hereis apt to be local deposi- 5 tion of carbon, the deposition in either case serving to more or less insulate the metal from the cooling effect of the contained liquid thus seriously increasing the destructive effect of the heat.

and the method of operation involved therein the boiler, still or other article being heated is evenly heated, thereby greatly prothrough regenerators or recuperators in which a large share of the residual heat conv tained therein is absorbed and returned to the air employed for combustion when the operation of the furnace is reversed. \Ve also provide means for automatically reversing the furnace'at even intervals and for accurately controlling the supply of air and the exhaustlof waste gases such that maximum efficiency. is provided with minimum By means of our improved constructionvolumetric capacity. Other features andadvantages of our inventionwill appear from the following. detailed description and claims. I

lVhile we have shown and described our invention as embodied ina battery of boilers it is to be understood that this specific disclosure is for the purposeof exemplification only and that the invention is not limited thereto but is defined in the claims, in which we have endeavored to distinguishit from the prior art as known to us without,

however, relinquishing or abandoning any portion or feature thereof. v

In the drawings accompanying and forming a part of this specification, Figure 1 is a front elevation of a battery of boiler furnaces embodying our invention, partly broken away and showing the interior in vertical longitudinal section; Fig. 2 a plan partly in horizontal section; Fig. 3 a transverse vertical section on the plane of the line 3-3 of Fig. 1, parts being shown in elevation; Fig. 4 a plan of a detail on an en-' larged scale, the stack being shown in horizontalsection; Fig. 5 an elevation partly in vertical section of a detail on an enlarged scale, and Fig. 6 an elevation of the same detail perpendicular to the plane of Fig. 5. I

Parts are identified by the same reference characters wherever they occur in the several views.

In the particular embodiment of our invention chosen for exemplification thereof and shown in the figures, the boilers are rep-- resented at (3, three being shown in the battery, mounted on suitable settings 7. The

boilers are shown as of an ordinary cylindrical form. Beneath each boiler within the setting is provided a space 8 for the flames and hot gases-with which space communicate two combustion chambers 99 arranged respectively at opposite ends of the boiler. The fire boxes are formed on their respective opposite sideswith preferably inclined openings '10 into which project burner nozzles 11. These nozzles are angularly adjustable and connected by branch pi )es 12 with fuel mains 13 arranged longitudinally of the battery on opposite sides thereof. By reason of this angular adjustability of the burners the flames may be directed as desired in the combustion chambers or into the fire box or heating space beneath the boil ers. Each combustionchamber is connected y a lower level.

by a shortvertical flue or opening 14 with a horizontal flue 1.5 there being two such fines, one on each side of the battery and extending substantially the length'thereof but at Beneath eaoh'flue i15'is a sec-a nd or stack flue 16 and between the fines l-16 01? each pair are a nest or multitude of vertical tile pipe sections l? which form the communication between said'flues and 16. In theopaiticular construction shown the tile sections" 17 rest upon thetop'arches 18 of thefluesldand said arches areperforated as at 19in registry withthe tile sectlons so thatproper commun cation between the fines 15 and '16 provided.

alve'ehamberflt containing a butterfly.

valve by jinean s of which the'respective V itiu'e or fuel.

flues can be thrownalternately intercom; munic'ation with the stack flue 21 and the air inlet ihie23. i

By reajson ofthe construction thus far described the boiler: furnaces are reversible, that isf'to say; ai r 01; supporting combustion and 'as or other fuel maybeiirst'supplied t0 the combustionchambers on one side of the battery and burn'ed therein 'for'a desired interval andtlienwconlbnstion maybe shifted to the; set of' ohafl be1's on the other side of the battery, the chambers being thus alternated in use. (\Vhen combustion taking place inthe ene'set of chambers the products of combustion after {passing through the heating]: chambers under the respective boilers escape tl i'ro ngh the CpDlbliSilOIhClialIibers; on the other side of the setting and do'wnlthroughhthe openings 14, flue 15, tiles 1'? and flue 16t0 the sta'ckf'In passing in the smallseparatedstreams through the tiles 17 the great ioportion oi the residual heat in thelgases is communicated to the tiles so tliatthegases escape'tothe stack at a relatilvely low temperature and. When the operation is reversed, the air in passing tl'iroiigh said tiles on its ay to the respective fireiboxes is preheated to a high degree, so that the products of combustion passing from hllQChkIlIlbGIS to the space heneath thefboile r areihighly heated to therequi' ied temperature with a minimum expend-- The reversal of operationis. etl'ected by shifting the butterfly valve 25' and "at about the same time changing the supply of fuel gas 'iron 'theone set of coinbustio'n chambers to t1 eothei; Thus when the'biitterfiyj valve .13 in theposition shown in Flg. Qthe air' enter ngthe inlet 23 will 'flow throughthe passage 20incon1municatio'ri therewith and so to the corresponding flue l6 andthecornbustion chambers above thesa ne ivhile at the same time the ,prod

'ucts o1"- conibustion passing down on the other side of the batterygenter lthc line 16 andv through the'branoh fine 20 "flow 'to the stack.

Obviously more or less complete combustion may be caused to take place thereinand it is preiterable that the I arrangement be such that con'ibustion sltiall lbeicompleted therein in order to avoid the carrying of unburned material intothe "recuperator tile passages 17' and the fl'ues and stack; The fianieshowever may be shiftedas desired by adprs'tm'g the burners", In'order to heat the regenerators or recuperators infaidvanc'e of putting the furnaces into ope'rationor if desired to increase the temp'eratu 'ei thereof and of the connected 1 p assage V V ings extending 'tln ough the exterior wall of the setting intofcertain of th'e'holl'ow tiles orfregenerator pipes jandprovide branch fuelpipes 27 frgnrth f naijn 13, the ends of which project-into the'jo'penings 26 28 by suitably 1 arian-ging th e, burm 'ers in the respectiveIconibustion chambers s; we provide at 26 open-' and. form burners, seefFigs. 1 and 3'. By

igniting these burnersthetiles'andthe pas-v sages beyond the same 'willbe heated, re-

ferred to above, Suitable ,valves are provided tor Qcontrpllin'gthe fuel supply pipes 12 and 27. Obviously'by thusiproviding'ifor the combustion in thefire boxes and'pe1'"io'dically reversi.ng}the directionof flow oif'the heating gases from tl e lire b'oxes soth'at the hot gases aire alternatelyf supplied to the opposite ends of the boiler ior otheifiobject heated amuchjmore linifoi 'in and even heat ing effect is obtainejchthusfpreventing tlie rapid deterioration depositionof linije, etc,

which take place in the c finstructio'n off the,

prior artjvhel'e the heat distribution is un- I even and certain regions or portions of the apparatnsfare jsnbjlectfto overheating it a.

vention illustrated in the d' 'awings the re versal of operationdescribed above is'automatieally efl ected, both thejjbuttcrfiy valve sides of theftu'rnaee to which We, have be fore. adv'eil ted. The turning plug of the valve constructed in an obvious ,manner to alternately; throw the/respective branch pipes 3132 into 'comn iunication' with the supply pipe 30 andisinountedj0n the spindle" 0r 'rev'oluble stem 3B'olthe butterfly valve so that the "two 'valv'es will swing together.

The upper jendof this spindle is provided with an arm B ijwlnh s connected by a link 30 \vlth rod 36 of anac'tuating piston con-' tained in the cylinder 37 see Figs. 1, 4iand 5.

The cylinder??? is'alternately supplied with a-mot-ive-fiuid, steam or the like, at opposite ends'by means of a suitable slide valve 1n the casing38, mounted on the cylinder.

This construction is'so well known that despace or crotch between the branches of the respective forks. .The pinions are driven in opposite'idirections by an intermediate beveled pinion 46 and the pins 44, 45 are so arranged that they will alternately engage the respective forked arms 40, -11 to alternately'rock the shaft 39 first in, one direction and then in the other, the intervals between the rocking movements being the same so long as the pinions 12, 1-3 are revolved at uniform speed. The pinion 4:6 is

mounted on the shaft 47, of a gear 48,'and

the latter is driven by a train of reducing gears 49, 50, 51 from a worm wheel 52, the

latter being turned by a worm 53 driven by a small electric motor 54.

The electric motor is constantly driven while the furnace is in operation and the reduction by means of the train of gearing is such that the desired interval is permitted to elapse between each operation of the valve within the casing 35. Thus the fuel supply valve and the butterfly valve are shifted together at suitable intervals to reverse the firing of the furnace. Obviously to increase or decrease the intervals between reversals it is merely necessary to suitably change the reducing gear described above. The turning plug is so ported that the fuel is turned on at each reversal only after the butterfly valve has reached a-positiou to cut off the air from the combustion chamber previously fired.

In order' to regulate the supply of air so that just the proper amount for perfect combustion with no substantial excess shall be supplied to the fire boxes, we provide the air inlet fine 23 with a gate valve 55. The position of this valve maybe regulated by means of a wiudlass 56 on the drums 57 of which are wound cables 58 connected to the respective opposite ends of the gate valve or damper. The shaft 56of the Windlass is provided with a worm wheel 59 which may be turned by means of a worm 60 to adjust the damper.

In order to control the escape of gases to the stack and yet provide a free passage to the stack and prevent trapping of the hot gases in the upper part of thehorizontal flue leading to the stack, we form theopening from said flue to the stackon an incline, as shown at 61,Fig. 1, and employ a damper or. gate 62 which slides within a recess 63 below said flue. I A Windlass and connections similar to those described in connection with the air damper are employed for adjusting the stack damper 62. By mounting the damper below the passage so that it willcut off the lower rather than the upper part thereof when partially closed, we zwoid trapping the hot gasesand thus a much better' draft is provided with the same capacities of flues and stack.

e claim: I

1. In a furnace of the class described a boiler, a setting therefor including a heating chamber beneath the boiler, a combustion chamber at each end of the heating chamber and beyond the end of th'e boiler, burners extending into the combustion chamber from opposite sides thereof, a flue communicating with each combustion chamber, an air inlet and a stack flue with which both of said" fines communicate and valve mechanism whereby said flues may be alternately cut off from the stack and air inlet.

.2..In a furnace of the class described a boiler, a setting therefor including a heating chamber beneath the boiler, a combustion chamber at each end of the heating chamber and communicating therewith and beyond the end of the boiler, burners extending into the combustion chambers from opposite sides thereof, a flue communicating with each combustion chamber, a regenerative means in each said flue, a stack and an air inlet also communicating with both said fines and valve mechanism whereby the said lines may be alternately cut off from the stack and air inlet.

3. In a furnace of the class described a boiler, a setting therefor including a heating chamber beneath the boiler, a combustion chamber at each end of the heating chamber and communicating therewith and beyond the end of the boiler, burners extending into the combustion chambers from opposite sides thereof, a flue communicating with each combustion chamber, a regenerative means in each said flue, a stack and an air inlet also communicating with both said flues,

valve mechanism whereby the said flues may be alternately cut off from the stack and air inlet, and means for automatically reversing said valve mechanism.

4. In a furnace of the class described a substantially horizontal stack flue, a stack and a connecting flue inclined upward from said horizontal fine to the stack.

5., In a gas-burning furnace 'of the classdescribed a stack flue, a stack, a damper con-l trolling the passage of gases from the fine to the stack, said damper closing upwardly.

6. In a gas-burning furnace of the class ingithe' opening bet-ween sa'id- 'flne" and stack,

Said verve chamber; a valve 'iri' said chamber and an adjustable damper fer if'eg'til ating the opening of the air inlet.

8. In a revfe'ing fnrn ac'ebf the (il zissflescribed find in jcomb'ihetion with the heatiiig chamber and oppositelyarranged combustion chambers thereof, a horizontal flue cennected 130 the combustion chambere 'On each side of said heating chamber, a seepfidpair of fines respectively beneath the first *Ipenfliened flue's, 'hol'low tfle connecting said flue's and adapted to beheated by the PliOdlilC tS/Of cm'nbus'bimf a'ndt'o heat iii]: assing therethrdu'gh, cbnhectieifs fi'oin the-last ment'ione'cTfluels to a stack :t'nd a'n'ziir inlet and means for reversing said eonllect-ions.

ASA F. CORNN'ER; GEORGE V. K. KING.

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