US1116664A - Mechanical stoker for promoting smokeless combustion. - Google Patents

Description

KS YANG.

MEGEANGAL STOKER TEUR PROMOTING SMOKELESS UMBUSTGN.

AFPLIUATION FILED JUNE 26, 1912. y jg@ l :mm :a wifi.

USHil--STEET K. YANG, Mfxcszmnm wenn you momoffme :mom-amg sommusfmm. APYLIGATION FILED JUNE 25, 1912.

Patented Nov. i0, 1914 YANG. MEHANIGAL STOKER FOR PRMTING SMUK'ELESS OMBUSTION.

MYLIGMIQN NLRB JUNE ze, 1912l mmm@ 'thusv moving the rear vgrate mover 3 forward or outwardly from the furnace.

The present invention contemplates' the use of two rows of grate bars arranged in stepped order, viz. front grate bars 12, and rear grate bars 12. The former have suitable cutaway portions or-recesses in their lower surfaces at the front ends adapted to alternately engage with one or the other of the grate movers 3, 3'; that is to say, while one grate bar of the front rank rests on top bars engagingwith the rear moverl 3 are adjacent to the inner face of the front mover 3,50 that when the latter is moved in a back ward direction, or toward the furnace, the rear mover will at the same time be moved I in that direction.

.y half burnt fuels `of the rear grate.

' spectively at the top To insure even distribution of the fuel, I

,provide upon each of the front row ofgrate bars projections orpyramidal knobs 13 as shown in Fig. 4, which, as the bars reciprocate, act -as mixers and disperse the fuel evenlyover the surface of the grate bars.

At the lower rear end of each of the front grate bars 12, a small lug is provided, which vengages with a corresponding cut away portion or roove 15, formed in the upper faces of each ar of the rear grate 12 as shown in Fig. 1.

n practice it lis found that the fuel'is liable to be largely consumed in the front grate 12 before it -is passed onto therear ate 12 leaving on this later grate only small quantities of soft coke which is liable to admit su lus airinto the furnace,thereby adversel a ecting the efficiency of the furnace. o obviate this defect, the grooves -15 in the rear grate bars are made longer than the width of the lug 14, so that the travel of the front grate is greater than that This insures the fuels accumulating to a larger extent upon the 'rear grate and consequently revents the admittance of an excess of air into the rear of the furnace. 16 is an ash-pit tray upon which said rear grate bars 12l are mounted. This tray serves as a artition for separating ropping) through the spaces between the grate ars from the a ready burnt up fuels or ashes falling over the back ends of the rear grate bars 12. 17 and 17 are two sliding doors fitted reand bottom of the said 16 as shown in the drawing. lVith tray room is smaller flues where insutnc allowed for the installation of such trays, a suitable flue protector may be used so as to utilize the same as a support for the rear Grate.

Above lthe front portion of the front grate -pyranuidal or other suitable projection 19 preferably in the middle portion of the rear end. 20 is a series of obliquely arranged air passages extending oppositely from and parallel to the sides of said pyramidal projection 19 as shown in Fig. 4.

The pyramidal projection 19, serves to accumulate thicker in the center than it does at. the sides of the grate of the furnace. The oblique perforations 2O serve as air passages for igniting the fuel before it -falls upon the surface of the grate bars.

19 is a rib extending' across the entire 18 which serves to return or force back any burningfuel and thus encourages and expeldites the ignition of fresh fuel falling on top of the dead plate. This will leave no useless pace-between the dead plate and the grate ars.

Movably mounted upon the dead plate 18 lis a fuel conveyer which consists of the casing 21, the back wall of which is inclined and has a number` of air passages 23 therethrough and is provided with one or more buckets 24 according to the size of the furnace as shown in Figs. 1, 2, and 4. This fuel conveyer serves not only as a forwarder of the fuel butalso as a coking plate or chamberl Two lugs 25 are arranged in the middle bottom portion of the part of the casing 21. Each lug is provided-with a vertical aperture 26 which is adapted to receive a suitable connectin rod 29, which rod engages vat its lower en with one of a specially elongated grate bar of the front grate and thus reciprocates the casing. To adjust the posi\ tion of the connectin rod 29 and conseuently the position o ,the casing 21 relatively to the dead plate, a number of small blocks 28 are used to be inserted in the space between the rod 29 and two lugs 27 which are provided on the upper surfaces of the front end portion of the said elongated bar, as shown in Figs. able screw bolt ho ding the said connecting rod 29 in the aperture 26'. By this construction -the position of the said connecting rod will be readily ad'usted by increasing or decreasing the num r of the said adjustin blocks 28 and'consequentl the movement o the conveyer will b'e regu ated at will, which in turn regulates the feeding of thc fuel. fr Above the dead plate and in the front ed crownI late 31 which is adapted to serve as a hot raft creating member by heating 12.is placed a suitable dead plate 18, havingv eliminate the usual tendency of the fuel to 'width of the lower surface of the dead plate4 1,4and7.. 30isasuitl part of the furnace 1s an'internally mountmiem/.1

the eine or steam Jfrom the injector This injector may consist of a depend-ing tube et the front of the furnace, the lower end gJening into the furnace as illustrated at iwi.

"lhe feeding hopper 33, which ia fitted with a sliding door 34,'opens directif,V to lthe conveyerhelow, and the Airaporized matters evolved from the fuels above the coking plate will .be thoroughly mixed 'with the jets of heated air or steam issuing fromthe inector whereby the complete ignitiaia of an inflammable gas is insured andthe products of combustion are caused to issue in a long smokeless flame.

ll`o apply 'my invention to the furnace of a Water tube boiler, o1 to other furnaces ofv a like class, l provide Vas shown in Fig. l2, suitable Vpartitions or walls such. as 353, 3G, in the hack of the ashr pit. I also .provide a suitable Water tank il?. In order to keep the ash-pit entirely .sealed wilh'Water, the lower end oi the Said wall 36 is immersed in the water as-showlnso that the ashes or clinlicrs can be taken out without admitting any surplus air into the furnace. A

io prevent fused fuel or clinker from adhering upon,the brick work, chrome bricks may be used at the places where the rlinlrers are generally found to adhere with the brick work, 4for instance as with the crown pluie or upon the grate bars.

From 'the above description, it 1will be anders-rood that the coal fed into the. hopper will be comlucird through vthe adjusting door 2M, lo the point above the coking plaie which forms the front part of ,the conveycr. When the furnace is first lighted it is necessary to ll up the said coking portion with. alreadyignlted fuel prior to the feeding of the hopper, and therefore the fuel' .falling through the hopper 'will be highly heated at the point above' the eokingl plate Where it vaporizcs and by virtue of the movement of the conveyor passes gradually to the. dead plate to beignited thereon before it is carried down to 'the top -of the grate bars.

Having now fully described my inverntion, what l claim is:

ln a combustion apparatus, the c0rnbination of'two grate movers, a eet of bars connected with each of said movers, means for moving said movers inwardly together, andnioving said movers outwardly independenly o-i each other, a dead plate mounted above said grate bars and having avclownwai-diy projecting lug extending across the .-unie at sor-neV distance from the inner end.

"enacting with said bars and an upwardly lextending lng for spreading the iuel, andalso having a series of an' passages 1n the inner end thereof, and a fuel conveyor mounted on said plate and arranged for moving' the fuel lfmgitudinally thereof.

la testimony whereof I affix my signature in presence ofiwo witnesses.

` KHCIIIRO YANG.

Wil nesses Unten liiflunam,

lla ninna YosUMURA.

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