US1376843A - Twyer-grate for individual-gas-producer kilns - Google Patents

Description

`J.. T. AND L. IVI. UNDERWOOD.

TWYER GRAIE FOR INDIVIDUAL GAS PRODUCER KILNS.

APPLICATION FILED FEB.. Is, 1920.

1,376,8413. y Patented. May 3,1921.

F557- EI-,

' 2 SHEETS-SHEET 2.

s'rarss raient' ferries.

JOHN UNDERWOOD AND'IJOIS iM. 'UNDERVOD,^OF DAYTOFL OI-IIC;

TwYEn-GRATE non iNnr-vinuiiL-Gns-PnonucnnKrimis;

To all whom t may cof/wem Be it known that we, JOHN-T. UNDERwooD and Lois M. 'UNDERwooD, citizens o f the United States, residing at Dayton, in the--Y county of'Montgomeryand State of hio,

have invented certainnewandfuseful lm-V provements-in Twyer-Grates for Individual- Gas-Producer Kilns, of-whichy the following is a specification. r l l This invention relates I'to Anew and useful improvements in grates for furnaces and is designed primarily for use -with twyer grates forl furnaces of individual gas producer kilns. i v

More particularly, the invention relates to the construction of the twyer grate, and means for removing the accumulations ,ofV

ashes therefrom.

One object of the invention is to provide means whereby thefashesfmay be removedfrom a stationary grate, or fuel supporting structure, from-beneath' the burning fuel,l 'without displacing the fuel or seriously af-V fecting it other-than to permit it to settle down upon the grate. v

A further object f of the invention is to provide,` in connection withV such anashesy removing device, lfa simple and highly i etlicient grate for burning coal forthepurpose of producing gas.

Other objects ofl the invention may appear as the'device is described in detail.

Referring `to the said-drawings in? general terms, Figure 1 is a front elevation of a portion of a kiln showing the furnace. Fig. 2 is a vertical sectional elevation of the furnace ofv an individual gas producer kiln, parts being broken away toY economizespace.' lFig.

3 lis -a topplanview of the grate removed from the furnace. Fig.y 4 is a sectional viewon'the line of Fig.-3. 'Fig. 5 is a crossV sectional view: on the1line*-5- 5- `of Fig. 3. Fig. 6 is aside elevation ofrthe'front end 'of the grate showing the. operating 'lever by which ,the" a .ash a removersare Yoperated,

' Y and Fig.` 7.is anenlargedsectional view of a portion of the 2 front' end ofthe grate, lon the line '-f-"-f-'- of. Fig.I showing a part of the'airands'teanifl inletfpipe.

In these'. drawingsxwefhave illustrated onel embodimentwof our invention-and have shown the same as applied toa furnace 'gas' i producerAll and -as comprising. a stationary grate; Vor I fuel supporting; structure, which is provided, preferably, :with oneJ orl more' twyers andf'wlth means for forcing-a cur`i` Specification of LettersPatent;v

rent of air through the twyers int-o the Patented'May 3, 1921.2k

ApplicationI iled vFebruary Y18, 1920, 1. Seal Nm l 359564K mass of fuel resting uponjthegratelL nMounted for movement over the uppersurface of the fuel supporting structure, alongsidethe twyer or twyers, is an ashes removingk de-` vice of such a character that .it will kmove the ashes from beneath the mass of burning fuel toward one end ofthe grate and there vdischarge-the same without seriously aifect ing the mass of burningfuel. 4It will fbe un'-l derstood that 'the invention may ,takeva-v Y rious forms and may/be utilized with furnaces of various kinds .withoutwdeparting from the spirit thereof, and, therefore, that the particular embodiment `here illustrated Y has been chosen for the purposes of illustration only.

In a more particularA descriptionVIV ofthe inventionv similar. reference numerals will be employed to indicate the samepartsin the several views of the drawings. -l-

designates the furnace of an individual` gasv producer kiln, and 2- is the bag-wallof said kiln. The-furnace le is a par-t ofthe kiln construction and each kiln of a series is provided in the structure thereof, with its. e 'own individual gas producer furnace or` chamber. p v

The *subject-matter of the jpresent improvements `consists ofk a removable twyer grate which is especially constructed yto .pro-

videv the necessary producer gas yfor burn-` -ing the kiln, after which said grate may be vremoved to the individualfurnace of an- -,-5-- projecting from -:the v opposite side walls of the furnace. Vhen this pan -3-.

is supported on.V said ledges -5--,asshown.

fin Fig. 1, the spacef-Gfwhich'is'usually termed anash-pit, lies below, but the .ashes do-not enter this space; Means" forL removi ing said-ashes fromfth'e grate inthe fronty Y l of the furnace are provided as follows: The pan-3-- is imperforate and supportedV thereon and thereabove .is :a twyeraplate T-'which constitutes theupper part, .orf-

twyers k-8- eXtendin -fuelsupporting surface, of the grate and y which' has, 'inthe' presenty instance, .two` substantially. the

iio

ing the twyers -8'- is rigidlyxsecured tofA twyers may be increased by increasing the area of the said plate 7 as well as that of the pan 3 In the present instance the twyers comprise openings, or slots, formed in the plate 7 and having upwardly converging ianges arranged on both sides thereof. Immediately above the said twyers 8 are longitudinal bars 9 curved transversely Vand united to the ends of the twyer plate 7 These bars 9 or cover plates, as they may be properly termed, provide a certain space above the twyers for'the air and steam to pass into the body of Coal lying upon the grate and from which the producer gas is generated. The grate, it will be understood, consists of the pan 3 the twyers 8 and the cover plates 9 the latter being united to the twyer plate -at both ends l0 In the present form of the invention the ashes removers consist of endless chains l,l which are arranged parallel with the twyers and therebetween and on each side thereof and rest'on the twyer plate 7 These endless chains 11- pass over sprocket wheels 12- and 18 the former being Y on the outside of the front of the furnace1 and the wheels 13 being within a pocket 14 in the back of the furnace or more properly speaking, in the bag-wall 2 The inner wheels 13 are mounted upon a shaft l5 which is supported in bearings 16- cn the innerends of the flanges 4 of the pan 3 or in any suitable Way. The inner wheels 13 may be either sprocket wheels as shown, or grooved pulleys.' The outer wheels 12 are necessarily chain wheels as they drive the chains ll through the spaces between the twyers and alongside thereof. The front sprocket wheels 12 are rigidly mounted upon a shaft 17 which is likewise mounted in the forward ends of the flanges -lf-f of the pan 3 It will be understood that there are two sprocket wheels 12 13 for each chain. The said chains 11 or rather ysome of the links thereof, have projected from them hooks 18 which serve to break up any clinkers that may lie in the path of the movin chains when operated to remove the ashes rom the grate. These hooks 18 as shown,

thereof may be employed as may be found necessary. At the'front end of the grate the pan has a suitable opening 19 into which a lsteam and air pipe 20 is projected and 'byA means of which steam and air are injected into said pan 3 below the twyers. On the end of the front shaftV claim pro-v ject from every fourth link of the chain and l7 a ratchet wheel 2l -is secured, and loosely mounted on said shaft, adjacent to said ratchet wheel, is an operating lever 22 the said lever having a pawlA 23 the end of which is adapted to engage the ratchet wheel 21 to move the shaft 17 The double acting pawl 23 is pivoted at 2l to the operating lever Q2- and has a tapered projection 25 projecting from the middle portion thereof. This tapered projection 25 engages a tapered end 26 of ay plunger 27 which is supported on the lever 22 and is pressed toward the tapered projection 25 of the pawl 23- by acoi'l spring 28 This plunger 27 holdsthe pawl 23 in either position.- When it is desired to reverse the movement of the chains 1l the pawl 23 is moved byr hand chains are simultaneously operated.

The front of the furnace has'a door 30 whichcloses the upper part of the furnace only, and leaves the lower part exposed so that the grate may beoperated at will to remove the ashes from lthe twyer grate.

lhie we have shown and described one embodiment of our invention. we wish it to be understood that .wey do not desire to be 'limited to the vdetails thereof as various modifications may occur to a person skilled in the art. i j

Having described our invention, we

ll. In a device of the character` described,

lll)

a stationary fuel support, and an ashes re- Y moving device mounted for movement over said fuel support beneath the burning -fuel thereon, and means for actuating said ashes one edge of said fuel support.

iisV Vremoving device to move the ashestoward j c face of said fuel support and' beneath the I burning fuel supported thereby, andmeans for actuating said conveyerV to move the ashes from beneath the fueltoward one edge l of said support.

3.-In a device of the character described, a stationarj fuel support having a twyer extending longitudinally thereof, means to force acurrent of air through said twyer,

said fuel support being arranged to permit ashes to be discharged at one end thereof, ashes removing devices mounted on opposite sides of said twyer for movement over the upper surface of said stationary fuel support, and means for actuating said devices to move the ashes from beneath the vburning fuel toward the discharge end of said fuel support.

4. In a device of the character described, a stationary fuel support having a twyer extending longitudinally thereof, means to force a current of air through said twyer, said fuel support being arranged to permit ashes to be discharged at one end thereof, endless conveyers extending about ksaid fuel support in the direction of its length and having their upper stretches arranged to move overrthe upper surface of said fuel support on the respective sides of said twyer to move the ashes from beneath the fuel toward the discharge end of said fuel support, s

with a twyer, means for forcing a current of a'ir through said structure' and'said twyer, and ashes removing devices mounted for movement over said fuel supporting part parallel with and on opposite sides of said twyer, and means for actuating said ashes removing devices to cause the ashes to be moved from beneath the burning fuel toward one end of said hollow structure.

6. In a device of the character described, a stationary pan, a fuel supporting plate rigidly secured-to said pan and having twyer openings extending longitudinally thereof, covers extending over said twyer openings, chains arranged to travel through the spaces between adjacent twyer o enings and lengthwise thereof to remove t e ashes from saidv fuel supporting plate, and means for driving said chains.

In a device of the character described, a fuel supporting structure comprising a pan-shaped plate having its concave side pan-shaped plate and provided with twyer openings, said pan-shaped plate having anl opening in one wall thereof, an injector extending into said opening, chains movable over the upper surface of said second plate alongside of said twyer openings, wheels supporting said chains and arranged at the ends of .said structure, and means for simultaneously actuating the wheels at one end of said structure.

8. In a device of the character described, a fuel vsupporting structure comprising a pan-shaped plate having its concave side upward and having marginal flanges adapted to be supported Vby the walls of a' furnace, a second plate mounted on the first mentioned plate and provided with twyer openings, an injector communicating with said pan-shaped plate, endless chains mounted for movement over the upper surface of saidv last mentioned plate alongside of said twyer openings, and having projections thereon, and means for actuating said chains.

9. In avdevice of the character described, a fuel supporting structure comprising a pan-shaped plate having its concave side upward and having marginal flanges to rest upon the side walls of the furnace, a second Y plate mounted on the first mentioned plate and having twyer openings therein, bars lying abovesaid twyer` openings to form covers therefor, an injector communicating with the interior of said pan-shaped plate beneath said second plate, endless chains adapted to travel over the upper surface of said second; plate alongside of said twyer openings, said chains having projections eX- tending therefrom, said pan-shaped plate having bearings at the respective ends thereof, shafts journaled in said bearings,

' wheels mounted Von said shafts to support .said chains, and means for rotating one of said shafts to drive said chains.

In testimony whereof'we affix our signatures. Y

JOHN T. UNDERWOOD. LOIS M. UNDERWOOD.

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