US2493939A - Multistage incinerator for drying and burning wet refuse - Google Patents

Description

`Faun.. 10, i950 J. G. AMES MULTISTAGE INCINERATOR FOR DRYING AND BURNING WET REFUSE 2 Sheets-Sheet l Filed July 26, 1945 INVENTOR.

9 3 uw 3 @u 4, 2 G N I V.. R uw R 0U wm R EN T MAW Am .N W GH I .N N J Wh EB G AnD mm I T L U M 5 9 G in m WJ 2 Sheets-Sheet 2 Filed July 26, 1945 l y?! L Wa WG m Patented Jan. 10, 1950 MULTISTAGE INCINERATOR FOR DRYING AND BURNINQrrWET REFUSE James G. Aurora, Ill.

Application July 26, 1945, Serial No. 607,181

11 Claims. l This invention relates, in general, to the art of incineration, and has particular relation to an improved incinerator for the disposal of garbage, rubbish, and other refuse or waste material.

While the embodiment of the invention which I shall describe hereinafter in connection with the drawings is a gas-fired device particularly adapted for domestic use, it is to be understood that the invention in its broader aspects is not limited to such use but may be employed else- Where as suitable and desired.

In the conventional incineration process a high temperature flame is made to impinge directly on a mass of wet or damp garbage. The result is SCOIChiIlg, Which produces offensive odors, along with a heavy smoke, which have a tendency to leak out of the incinerator because of lack of suicient draft. This lack of draft is due to the lack of high temperature, the heat of the burner llame being rapidly absorbed by the water or moisture content in the refuse.

The present invention` may be characterized as an improvement in incinerator, in general, of the type disclosed and claimed in my copending application, Serial No. 607,180, filed July 26, 1945. '2l

In such type of incinerator, the refuse is disposed of by multi-stage incineration, having a first stage in which the garbage or other refuse is dried or dehydrated (completely or partially) at a relatively low temperature and preferably without direct impingement of the flame on the refuse--for example, by relatively low temperature iiue gasses-and a second or ignition stage in which a hot flame impinges on the dried or dehydrated mass to burn and thereby dispose of same.

As a result of rst drying or dehydrating the garbage or other refuse before igniting or burning the same, smoke and odor are very greatly reduced; carbon deposits and the resulting chimney res are avoided, and the amount of resulting ash is reduced. Moreover, the very hot ignition ame assures a strong draft, even on hot, humid days, which draft eiiectively carries away any small amount of smoke or odor high enough above the chimney to give good dispersement. The strong draft induced by the hot ame also seems to eliminate the pressure zone in the combustion chamber, which,'in turn, solves the problem of smoke, for example, in the basement.

`One of the main objects of the present invention is to. provide an improved multi-stage incinerator in which separate drying or dehydrating and ignition or burning chambers are provided, one for the drying or dehydrating stage and the other for the ignition or burning stage.

Another object of the invention is to provide in conjunction with the improved multi-stage Aincinerator of the character described, an improved air control in which the air fordrying or dehydrating and for ignition or burning of the garbage or other refuse is compelled to pass flrst through the drying or dehydrating chamber, and from the drying or dehydrating chamber into the vignition or burning chamber and thence out, for

example, through the ue.

The improved method of air control of the present invention enables multi-stage incineration in a plurality of compartments, as distinguished from multi-stage incineration in one compartment where it is necessary to subject the refuse to the first stage and thereafter to the second stage, and to complete the second stage of incineration before again subjecting further refuse to the first stage of the process. The multi-compartment feature of the multi-stage incineration process of the present invention enables subjecting the dried or dehydrated refuse to the second stage of the process in one compartment, and, simultaneously or without completing the second stage in such compartment, to subject further refuse to the iirst stage of the process in another compartment. This is highly advantageous.

Another object of the invention is to provide an improved multi-stage incinerator of the character described having a hearth plate or refuse support for receiving and supporting the garbage or other refuse upon introduction of same into the incinerator, and in which the refuse is subjected while in position on `said hearth or refuse support, rst, to a drying or dehydrating stage, and thereafter,` and With the dried or dehydrated refuse remaining in position on said support, subjecting it to an ignition or burning stage to burn and dispose of the same.

Another object of the invention is to provide improved means which is operable upon com.- pletion of the drying or dehydrating stage to move the dried or dehydrated garbage or other refuse to ignition or burning position.

Another object of the invention is to provide an improved drying and igniting burner arrangement.

Another object of the invention is to provide for relative movement between the drying and ignition chambers. or between the separated masses of garbage or refuse for drying and for ignition and the drying and igniting'burner arrangement for the purpose of accomplishing .with the improved air control and separation of the masses of refuse multi-stage incineration in .the manner set forth. -f

Another object of the invention is to provide an improved form of hearth or refuse support for supporting the garbage or other refuse in the drying or dehydrating stage and in the ignition or burning stage, Vwhich hearth or refuse support `is of acharacter or provided with cooperating 3 means for controlling the admission of air for circulation, as described.

Another object of the invention is to provide in an improved ymulti-stage incinerator of` the character described a pair of separate chambers each of which serves at one time as a drying or dehydrating chamber and, at another time, as an ignition or burning chamber..

Another object of the invention 'is-toprovide, in conjunction with the multi-stage incinerator in which there are a pair of separate chambers each of which serves at one time as a drying or dehydrating chamber and, at another time, asan` ignition or burning chamber, improved Vflue ,means operable to open at one time from one .chamber and, at another time, from the other chamber..

Another object'. ofthe present invention is to .provide an. incinerator of the class describedhaving various features of novelty andA advantages, and which. is4 particularlycharacterized by its `simplicity and compactness in construction, its economy inV manufacture, its effectiveness inuse,

land its ability to dispose of the garbage or other l refuse more completely and. economically and with less offensive odors and smoke.

Further objects andv advantages of the inventionwill appear from thev following detailed de-` scription, taken in connectionwith the accom- -panying drawings whichxillustrate the method of constructing. and operating v,one form of device embodying. the present invention.

In the drawings:

Figurerisy avertical' sectional view. of one. form of incinerator embodying the present invention;

Figure 2 is av top planview lof.- the incinerator shown. in Figure 1l;

Figure 3 is a horizontal sectional- View takenV along-'the line 3 3 ofv Figurel;

Figure 4- is ahorizontal sectional View taken along the line 47-4" of Figure 1;

vFigure 5 'is afragmentary' horizontal sectional view showing a modified form of device provided with means for tearing, pulling apart or mutilating the garbage or refuse;

vFigurel 61 is a Vertical' sectionall view of'a modifiedform of incinerator embodying Vthe present invention;

Figure 7 is a horizontalA sectional View taken along the line 'If-'I of Figure Gf;

Figure 8' isa horizontal sectional view taken l'along the line 8'-8 of Figure 6; and

Figure 9A isa horizontalsectional view taken along the line,r 9-9of Figure 6.

Referring Vfirst to the embodiment of the Vinvention illustrated in lFigures 1, 2, 3, and 4, I have shown in these 'gures, for purposes of illustration, an incinerator having an upright outerside vwall I0, formed', for example', of sheet metal' and of'cylindrical" or other suitable form. The top is closed, except for a nue outlet to be presently referred to, by a top wall IiI, and the bottom is "closed by a bottom wall I2. A removable ash rei ceiving receptacle A |13l is shown as restirnrfon` the bott-'om- IIZA. A handle I4 isprovidedon the front 'of the receptacle I3 for removing same to empty any ashes, which, with the-present invention, are

reduced tio a minimum- The hearthV plate, grate or' refuse support I5V is supporte@ for example, in ii'xed positi'onwithin "the incinerator bybra'cketsl. An-'uprightfshaft :or post FI" 'extends vertically through the Aspace 'above the grate I'and Tis-'journaledf tol-turn at I8 in the grate I5 and, at I9, in the top wall il. The upper end of the shaft or post l'l extends upwardly above the top wall II for a purpose which Willibe presently described.

The two chambers 2U and 2I of the device are dened by semi-cylindrical walls 22 and 23 respectively, formed, for example, of sheet metal and disposed concentrically within and spaced inwardlya-tr24" from the outer wall IIJ. The ends of the semi-cylindrical walls 22 and 23 terminate in integral diametrically extending walls 24 and 25 Which'provid'e diametrically across the space abovethe grate I5 a Wall or partition 2li, 25 of double thickness. This double thickness wall or partition 24., 2,5 is fixed at 26 to turn with the shaft or post II inturning the post to move the garbage orother refuse from drying or dehydrating posi;- tion toignition or burning position. The hearth plateor grate l5 may, Within the broader aspects 'ot the invention` and with modification, be arranged to turnl with the wall or partition 24, 25 and semi-cylindrical` Walls 22.. and 23, instead: of being xed in place as described. The inner. sur'- face of the outer wall lil may be lined with asbestos or other insulating material (not shown) which, whereemployed, is preferably spaced from the walls 22 and 23 to provide an annular space between the wall Ill and walls 22 and 23.

The walls 22 and 23 preferably terminate at a distance beneath the top Wall' l I, and the walls 24, 25 are cut away or terminate at a, sufliciently greal'ery distance belowf theY topV wall I'lI. tov provide spaces 28 through which the air and gases of Hcombustion pass from the drying chamber 2| "the garbagey or other refuse into the drying' or dehydrating chamber 2l. Rods 34 are shown eX- tending inparallel relation across the bottom of `the drying and ignition chambers 2li and 2l, and anchored at their ends in walls 22, 23 for supporting anyv bulky and heavy masses of garbage or other refuse above the grate I5. This, of icourse, may vary. The bottom of the incinerator may be supported on legs 3B, although this, too, mayvary;

Thev drying and,` ignition burner arrangement isA shown as comprising a suitable gas or iluid fuel burner 4,0 underlying the grate I5.; the particular burner illustrated in the drawings having a plurality of burner .outlets 4I. A gas or fue] 4supply pipe 42 extends from outside the incinerator through thewall I- and is connected to the burner` 413 for' supplying fuelY to the burner from a suitable source of supply. A shield 43, illustrated in the form of a metallic plate of slightly yangular-form, is suspended, for example, by sup- 'the drying burner-4I). 'Thetube 48- extends into "the incinerator through the-wall IB, and its inner fend is turned-at 'right angles and provided with a fuel outlet tip 50 directed across the drying' flame 45 above the burner 40. The tube 48 is provided, for example, with a push button or ash valve 55 for establishing an ignition flame. An open-ended flash tube 52 is suspended, for example, by a support 53 from the bottom of the grate I5. The tube 52 has one end in alignment with the outlet tip 50, and may be inclined slightly toward the opposite end to direct the ignition flame over a portion of the bottom of the grate I5, as shown in dotted lines at 56 in Figure 1 when the push button of the valve 55 is depressed to ignite the dried or dehydrated refuse in the ignition or burning compartment or chamber 20. The tube 52 illustrated in the drawings is of generally square or polygonal cross section, and has a longitudinal slot or opening 58 along one of the upper corners thereof for admitting air to maintain the ignition flame as it is flashed through the tube.

The hearth or grate I5 has, along the side above the burner 4U where the drying or dehydrating stage takes place, a plurality of suitable openings or apertures 6B for circulation of the heated air into the drying chamber at the loca.- tion 2|, as shown in Figure 1. 'Ihe opposite side of the grate I5 has, along the portion beneath which the ignition name 56 plays when projected from the tube 52, a plurality of openings 62 through which the ignition iiame 56 is adapted to impinge on the dried or dehydrated garbage or other refuse to ignite the same so that it will be burned and thereby disposed of For the purpose of rotating or turning the post or shaft I1 and the partition 24, 25 carried thereby, with its open-ended semi-circular Walls 22, 23, the-upper projecting end of the shaft I`| is provided with a handle 65 pivoted at 66 to a suitable fitting on the upper end of the shaft |11. The top Wall II of the incinerator has a stop 68 which extends upwardly from the wall I I and, by cooperation with the handle 65, limits turning movement or rotation of the handle 65 in a counterclockwise direction (Figure 2) at the position shown in full lines in Figure 2. The handle 65 is adapted to be swung about the horizontal axis of the pivot 66 to the dotted line position shown in Figure 2, and then turned through 180 from its dotted line position to its full line position to turn the compartment 2| and the dried or dehydrated garbage or refuse therein from drying or dehydrating position, as shown in Figure 1, to igniting or burning position, in which compartment 26 is illustrated in Figure 1. In this way, full 360 rotation of the handle 65, which would be prevented by the flue 29, is unnecessary.

In disposing of garbage or other refuse in accordance with the embodiment of the invention illustrated in Figures 1, 2, 3, and 4, the following sequence is followed: The cover 30 is opened and the garbage or other refuse, in wet or moist condition, is introduced into the incinerator chamber 2| into position on the grate I5 and rods 34. With the burner 40 ignited, the heated air passes up openings 60 in the grate I5, therebyl subjecting the Wet or 'moist refuse to a drying or dehydrating stage at a relatively low temperature and preferably without direct impingement of the flame 45 on the refuse. of combustion pass up through the chamber located in the position as shown at 2| and through openings 28 into the ignition chamber located as shown at 20 in Figure 1, and out through the The grate openings 62, beneath the ignition or firing yposition 20 as shown in Figure 1, are restricted relative to the openings so that there is no appreciable or at least no objectionable bypassing of the heated air through the ignition chamber, as located at 20, to the flue 29. In this way a novel and important air control is provided whereby the air for drying or dehydrating and for ring or burning of the refuse is compelled to pass, first, through the chamber in drying or dehydrating position, as indicated at 2|, and from the dryin-g or dehydrating position into the chamber in ignition or firing position as indicated at 20, and thence out through the flue 29.

In the drying or dehydrating stage of the process, the moisture content of the refuse is distilled off or expelled and, as a result, the ref-use is 'dried or dehydrated Without scorching and without objectionable smoke or offensive odors. Where I refer herein and in the claims to drying or dehydrating the refuse, I intend to cover either com-plete or partial drying lor dehydration of the material.

When the drying or dehydrating stage is completed by distilling off or expelling the moisture (garbage averages about 95% moisture), the handle is manipulated to rotate the Partition 24, 25 through 180, moving the compartment, shown in drying position at 2| in Figure 1, land the dried or dehydrated garbage or refuse with it to the position occupied by the compartment 20, as the device is illustrated in Figure 1. With the dried or dehydrated garbage or other refuse in the position occupied by the lcompartment 20 in Figure 1, the igniter valve button 55 is depressed to project the ignition -or ring flame 55 which impinges through the relatively restricted openings 62 in the grate I5 directly on the dried or dehydrated mass of refuse to burn and dispose of same Without objectionable smoke or offensive odors. Combustion of the dried or dehydrated refuse in the ignition or firing stage is fast, being usually completed in a few min-utes.

In carrying out the invention, the previously dried or dehydrated refuse is extremely combustible at the ignition stage of the process. The result is `a fast burning, hot flame which thoroughly consumes everything combustible, leaving only a surprisingly small 'amount of fine ashes. The very hot flame assures a strong draft even on hot, humid days, which carries any small amount of smoke or odor high enough above the chimney to give good dispersement. The strong draft induced by the hot fire in the ring stage of the process seems to eliminate any pressure zone in the combustion chamber, which, in turn, solves the problem of smoke in the basement. Moreover, as already pointed out, smoke and Iodor are very greatly reduced, and the two stage incinera- 60 tion according to the present invention seems through the 66 in this position as noticeably to reduce the amount of ashes resulting.

It will be noted that the compartment located in the position indicated at 2| in Figure 1 serves the drying or dehydrating compartment, and when this same compartment is turned 180 to occupy the `position occupied by the compartment 20, as illustrated in Fig-ure 1, it

serves `as the ignition or firing compartment of the The `heated air and products device.

With the plural and, more specifically, two-chamber or compartment form of device as shown and described, garbage or other refuse may be introduced into the compartment located as shown at 2| on one side, While the ignition or 7l firing stage is taking placev on the opposite side,

aaeaee 7? e., im thefcmnpartment'- locatedzat the position indicatedat 2|lfi`nEigure 1. i

Inthe embodiment of the: invention shown fragmentarily` in. Figure 5,. the. partition 24', 25' corresponds to-thepartition 24, ofj the preceding; embodiment o the inyention In this case the semi-circular. Walls- 22.,v 23A carried by the partition; ofi Figure.y 1 areomitted; and the Wall I0' hasI inwardly extending. ypins vor the like for tearingfpullingapart, or mutilating the dried or dehydrated massv of refuse as it is moved from drying position to firing; orw ignition positionby 180?- rotation of the partition 24', 25. The open.- ings 00 in the. grate. |15. are-shown in this case of annular elongated'form.

Inthe embodiment of thefinvention illustrated inEigures 61,. 7:, 8, and 9; the incinerator has the outer-upright side wallltlidiametrically disposed partition 1|., 72, land gratef1'3 which are similar to.y the corresponding. parts. in the preceding embodiment` of the; invention except that the openingsv in. the grate T3 are" different, .as will be described presently, and the semi-circular Walls carried byf the partition Tl, 1.2 and operable Within/the Wall'.v 'I0 are omitted. These semi-cylindrical Wallsfrnay, Aof course; be employed in this form; of the. inventionif desired; the showing beingmore or less diagrammatic for purposes Iof illustrating this form' of the invention. The removable ashereceiving receptacle lll is shown resting oir the bottom lzfwith an inclined marginal plate l5" for directing. the .ashes into the receptacle.. Y

In. this form: of the invention the upright axial post or'shaft: 1.6. is;journaledz to turnat '|"I in the ,gra-te- 'I3 at'the axisithereof, and, .at 1B. to turn in :a spider 'lg'mounted in therme-.88.0. The partition 1|, 'E52 in this embodimentof*theinvention is positionedz in fixed position instead vof, being mounted to: turn kWith the. shaft. T6" as inthe,I embodiment of the invention;illustrated'in Figures 1 through 4l The flue 80, insteadv of opening only from one chamber or compartment, opens from both compartments, and a damper 8| is fixed to turn With the shaft T6 and operates alternately'to close the openingsfrom the respectiveV chambers to the flue 'as the chambers: alternately operate or function as drying or dehydrating and as ignition or firing cham-bers. The top -of each chamber 82 and 83' i'sprovidedlV with a4 coverr 84' hinged at 8.5

and'. having'a handle 86 for raising the cover to open position for the introduction of garbage orV other refuseinto the respective chambers at suchr time that the chambers are functioning as dryingA or vdehydrating chambers, as will presently appear.. Ify desired, interlock: means may be provided' forpreventing openingof the covers 84' at such time that the chambersl 82 or V83 are functioning as ignition or firing chambers.

The drying and ignition or ring burner arrangement in this form of the inventioncom'- prises a drying burner and an ignition. or lring burnerQ I. The drying' and ignition or firing burners 99 and 9| are joined together into a unitary assembly; for` example, by bolts 92 or the like, and thisburnerassembly'90, 9| is mounted at. v93. on the. lower end oft' the shaft 16 to turn with the-shaft 'lliY and partition 1|, 12 upon rotation thereof. The drying: burner 90 has an overlying shield. 94 for protecting the garbage or other refuse on the 'gratev 13. in position above the. drying burner.A 90 from directimpingement of. thediying'burner. amea thereon through the grate: openings. 9b.

ample; an upwardly directed; outlet. for project ingfthe ignition or-ring, flame through an opening 9T in a shield 98 for direct impingement throughthe-grate openings 9,9A with the dried or dehydrated refuse in positionabove the ignition orv firing burner 9L. The shield 98 is mounted on the lower end of the shaft 'I6 to turn as-a uni-t with the shaft 16, burners 90, 9|, partition 1|, 112, and damper. Ble. Dueto the presence of the shield or plate. 98, Which restricts the grate openings 99 in firing or ignition position, these openings 99 may be substantially the same size and arrangedsubstantially the same-as thefgrate. openings 96. For the purpose of. rotating the shaft ".16, partitions-1|, l2, burners 90, 9|, damper 8 I-, andi-shield: or p1ate98 through 180, the shield or platey 98 has avhandle |00 which extends out through a circumferential slotv |02. The slot |02`4 extends circumferentially about the Wall 10 a suincient exten-t to permit the desired rota-- tion of the parts described.

A gas or fuel supply pipe |03 is connectedv to supplyfuel to the drying burner9-0,.for example; througlfiA a spud |04.. A second fuel supply pipe i535 isconnected to.- supply fuel to the ignition4 or ring burner 9|, for example, through a Spud i351 The pipes |03y and |05 may be fixed in position because the inlets to the respective burn ers EN]l and 9|v are coaxial With and turn about Ithe spuds |04 and. |05. The pipe. |03 maybe provided with a suitable controlvalve (not shown), and the pipe. |205. is provided with a suit.- able valve-such asa push button ash. valve- (not shown) for `projecting the igniting or ring. flame` from the. burner: 9| Whichmay, if de-v sired, be avhigh-low burner lto, maintain a con` stantrlyY burning restricted pilot ame.

In disposing of garbage. or othery refuse in accordance with the embodiment of the inventionillustratedin Figures 6, '7, 8 and 9, the followingy sequence is followed-I With. the damper 8|, drying and ignition orv firing burners 90, 9|, and shield 98 positioned as shovvny in Figure', the cover for the chamber at location 82 is opened.- and the garbarge or other refuse in Wet or moist conditionA is introduced into thecham-ber 82 intoposi-tion on the grate 13'. With the burner 90 ignited, theheated air passes up through the" grate openings 96 and into chamberA 82, thereby subjecting the wet or moist refuseto a drying or dehydratingf stage at a relatively low temperature, and preferably without. direct impingement of the ilame 95 on the refuse; The baiiie 8| is positioned at this time to close the outletfrom thel chamber 82 to the :due 80, as shown. The heated airv and products of' combustion passup through the chamber 82 and through the openings 28 at the top of the partition 1|, '12; also, ifi desired, around spaces between the outer ends of the partition 'H, l2 and' the interior of the wall 10, or through other openings in theA partition 1|, '12, and into the ignition chamber located as shown at 83, and thence out through'the open ue outlet` of chamber 83 totheue 80:`

".'The grate'. 'openings 99 beneath chamber 83- are substantially closed or covered at this timeY by the shield 98. This prevents appreciable, or atleast objectionable bly-passing of the heated air through thefring chamber 83, and compels the air for drying or dehydrating` and for-ignition to 'pass rst through the cham-berv in which drying or. dehydrating of*r therefuse is'l takingr place,

then into 'the-ignition or tiring chamber, and

thence out through the ue.

' at location 83.

isneaeee pon completion ofhthe drying. or dehydrating -means is operated to ash or project the flame of the pilot burner 9 l. This flame impinges through the openings in the grate 13 on the dried or dehydrated mass oi refuse to burn and dispose oi' Vsame without objectionable smoke or odors.

While the dried or dehydrated refuse is burning in the chambervat location 82, damp or wet garbage may be introducedinto the other chamber Then, upon completion of the burning of the dried o-r dehydrated refuse in one chamber and drying or dehydrating of the refuse in .the other chamber, the handle is manipulated to returnA the parts, 'for example, to the .positions illustrated in Figure 2, whereupon the burner 9i is operated to burn and thereby dispose of the dried or dehydratedrefuse in the chamber at location 83; and the damp or wet garbage or other refuse may be introduced into the other chamber. It is to be understood that the embodiments of the invention shown in the drawings are for illustrative purposes only, and it is to be eX- pressly understood that the drawings and the accompanying specification are not to be construed as a definition of the limits or scope of the invention, reference being had to the appended claims for that purpose.-

I claim:

1. In an incinerator of the class described, in combination, a generally horizontal hearth plate,

`a generally upright wall surrounding the hearth plate and dening an incinerator space above the hearth plate and a burner compartment beneath the hearth plate, a partition structure extending upwardly from said hearth plate and dividing the space above the hearth plate into a pair of incinerator chambers, said hearth plate having aperture means opening upwardly therethrough from said burner compartment into each of said incinerator chambers, a burner structure disposed in said burner compartment beneath said hearth plate and comprising a drying burner positioned beneath one of said incinerator chainbers and an ignition burner positioned beneath the other incinerator chamber, a shield overlying the drying burner to prevent access of the flame oi the drying burner to the interior of the overlying incinerator chamber through the aperture means in the part of the hearth plate overlying the drying burner, said ignition burner providing an ignition flame having access to the interior of the overlying incinerator chamber through the aperture means in the part of the hearth plate overlying the ignition burner, and means mounting one of the partition and burner structures for turning movement relative to the other structure whereby to position each one of the incinerator chambers alternately above said drying and ignition burners, with the other incinerator chamber alternately above the other of said burners.

2. An incinerator according to claim 1 wherein the partition structure extending upwardly from the hearth plate and dividing the space above the hearth plate into a pair of incinerator chambers is mounted for turning movement about a vertical axis above the hearth plate, and wherein 10 the drying burner and ignition burner are mounted in relatively xed position. n

3. An incinerator according to claim 1 wherein the aperture means in the part of the hearth plate overlying the ignition burner is more restricted than .the-aperture means in the part of the hearth plate overlying the drying burner.

4. An incinerator according to claim 1 wherein the incinerator has atop wall `having a nue opening outwardly from the top of the incinerator chamber overlying the ignition burner, and wherein the partition structure has an opening at the top thereof placing the top of the incinerator chamber voverlying the drying burner in communication with the top of the incinerator chamber overlying the ignition burner.

5. An incineratoraccording to claim 1 wherein the partition structure carries walls disposed within the generally upright wall of the incinerator and with said partition structure defining the respective incinerator chambers, and wherein the walls carried by said partition structure are open at the tops and bottoms of the incinerator chambers.

6. An incinerator according to claim 1 wherein the interior of the generally upright wall of the incinerator has inwardly projecting tearing means for pulling the refuse in the incinerator apart as the refuse is moved from drying position to ignition position by turning said partition structure about its axis. Y

7. In an incinerator of the class described, in

l combination, a generally horizontal hearth plate,

a generally upright wall surrounding the hearth plate and defining anv incinerator space above the hearth plate and a burner compartment beneath the hearth plate, a partition structure extending upwardly from said hearth plate and dividing the space above the hearth plate into a pair of incinerator chambers, said hearth plate having aperture means opening upwardly through said hearth plate from said burner compartment into each of said incinerator chambers, a burner structure disposed in said burner compartment beneath said hearth plate and comprising a drying burner positioned beneath one of said incinerator chambers and an ignition burner positioned beneath the other incinerator chamber, a shield overlying the drying burner to prevent access of the flame of the drying burner to the interior of the overlying incinerator chamber through the aperture means in the part of the hearth plate overlying the drying burner, said ignition burner providing an ignition flame having access to the interior of the overlying incinerator chamber through the aperture means in the part of the hearth plate overlying the ignition burner, and means mounting one of the partition and burner structures for turning movement relative to thev other structure whereby to position each one ofthe incinerator chambers alternately above said drying and ignition burners, with the other incinerator chamber alternately above the other of said burners, the aperture means in the part of the hearth plate overlying the ignition burner being more restricted than the aperture means in the part of the hearth plate overlying the drying burner.

8. In an incinerator of the class described, in combination, a generally horizontal hearth plate, a. generally upright wall surrounding the hearth plate and dening an incinerator space above the hearth plate and a burner compartment beneath the hearth plate, a partition structure extending upwardly from ysaid hearth plate andv ndividing '.the space above the hearth 'plate V:into

zehamber through the aperturemeans in theipart of :thehearthfplate jnverlying Athe drying burner, i

said ignition :burner Lproviding an .ignition "flame .mailing .access to dzhefinterior of the overlying iincineratorchamberzthrough'the aperture means in 'the part 'nf fthe :hearth iplate nverlyin'g the fburner, rmeans mounting ,onefof lthe parwtition :and :burner ,-struatm'es .orv turning movement relative to :the other structure whereby lto ipnsition LeachY onemf the incinerator :chambers alternately above said drying and ignition burn- .'ers .with ithe rother incineratnr 'ehambergaltermately above .the other :ofsaid burners, ythe paratition structure extending `upwardly :from ithe fhearth :plate and -dividing the space above the .hearth lpla'te :into ia `pair nf finoinerator cham- -lzners` being mounted-in relatively 'xed position ,i

and the drying burner .fand ignition Vburner being -mountegd ',for turning. mnvement asY Ya iunit vabout iaivertioalfaxis. .Y Y

iainincnerator accordingito claim Siwhere- -the'rvertical exisfof uuming 1mm/ement; of :said `drying.:andiignition' :burners comprises .a ver- 1.ticalsituaitproieciting inwardly 'above the lpart'rtionsstrnature, andwheizein there is 1a u'e opening 'upwardly .from th'etop fof iboth said -in- 212 mmeratormhambersf, and a medito 'turn :with shaft alternately ato :clase eommuninationihetween the n'espectiue-incinerater -ehanihers Vanrlisaiidfiine. Y 10.,Anjnoineratmrnecordingtosclaim78 where- "in'fthere is a .Shield @mountedv to 4turn with said 'drying and :ignition burners, :an-d' wherein said `shield ihas an fopening v.ior Aneg1'si';ration `with said ignitionburnerand with @anipertm'e 5in the fpart :of 'theL-hearth fplate everlying Y saidv ignition :burn- ..e1;, `,and wherein :said shield =isA impenforate outwardly :of the aperture *therein -to `restriet :the aperture means in, the pa-rt ef the hearth iplate Aoyerlying s.aid.ignitien`.burner.

Y '11. .An incineratnr according te .claimB Where- ,Yin there Aar-e. -s pnds fat. fthe-axis of 'I turning movement of fsaid dryingand tignition burners for delivering nel finte ,the respectivefburners.

JAMES-G. AMES.

.REFERENCES CITED The followingrreerences are of `record 'in the Urf'fthisf'pa'tent:

,Nmnber Name Date 526,283 Anderson Sept. '18, 1894 5.465458 .'Swindll Sept. 17,118.95 11,01%,379 :Harris V (bet. l', 191'1 'l0 :1-,009,9:1` 4 MayerfDmkel SNov. "28, 1911 .1,160,360 Atterbury Nov. 16, 11915 ,71267;355 Banber' May 28, 19118 Y191829893 .'Greenwalt. ZDe'c. 4, 1934 j @M5-,050 vi Bainii'set al;. rSSept. I7, "i935 r .v FOREIGN "PATIENTS :Number @Country Date 130.05 Great :Britain -dan. `1.9, 52892 14,2550 GreatBritain `Ocit.\.2ll,.;'t915

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