US997604A - Furnace. - Google Patents

Description

F. A. DALEY.

FURNAGE. APPLIOATIQN FILED JUNE s, 1910.

Patented July 11 1911 s @mms-s111121 2.

11A. DALEY.

FURNAGB. APPLICATION FILED 11111119, 1910.

Patented July 11, 1911.

3 SHEETS-SHBET 3.

Wiz/7265565.'

Zyzdevzr hrarlllrlldll @lillilQhl RED A. DALEY, 0F CHICAGO, ILLINOIS, ASSIGNOR TO UNDERFEED STOKER 4COT/[Pallt 'LOF AMERICA, OF CHICAGO, ILLNOIS, A CORPORATION OF NEW JERSEY.

EURNACE.

Sglla.

To all whom it may concern.'

Be it known that I, FRED A. DALEY, a citizen of the/United States, residing at Chi. cago, county of Cook, State of Illinois, have invented a certain new and usefuly lmprovement in Furnaces, and declare the followingr to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to niakeiand use the saine, reference being had to the ac coinpanying drawings, which form a part of this specification. y

l have found that it is desirable, in unden feed. stokers of the type disclosed and claimed in my Patent No. .644,644, to have the dead plates extend considerably beyond the rear end of the retort. This may of course be done by'nialting the supporting wall for the rear end i of the retort wide enough to pervmit the extended parts of the dead plates to lie thereon, but such anV arrangement possesses several disadvantages, In the first \,place, the use of a supporting Wall for the 'rear end of the retort makes it necessary to form a pocket in the wall in'l ear of the pusher rod 'so as'to permit the latter to play baci: and forth. As the pusher rod reciproca'tes it carries 'more or less line coal dust through the opening in the retort in which it plays; this dust collects-in the pocket after a time tof/,a sutlicient extent to interfere with the operation of the rod and malte it necessary that-the pocket be-cleaned out. Again, by having a considerable dead plate area overlying the supporting wall,. ivhere there is no chance for the heat to beY Vdissipated so as to permit this portion of the dead plates to remain cool, considerable difficulty is experienced due to over-heating and conas is desired be obtained withoutvre-v n'ioving any considerable portion thereof beyond the reach'of the air supplied to the furnace. Y A

The various features of novelty whereby the present invention is characterized will hereinafter be pointed out with particular- Specification of Letters Patent. Patented July 115 lgjljh Application filed June 9, 1910.

serial no. 566,066.

ity in the claims; but for a full understand ing of the inventlon andof its objects and advantages, reference may be had to the fol-V lowing detailed description taken in connection with the accompanying drawings, 'whereim v Figure l is a longitudinal-section through a furnace arranged in accordance with a preferred form of the present invention, the section being taken at one side ofthe retort; Fig. 2 is a section' on line 2--2 of Fig. l; Fig. 3 is a transverse section; Fig. Il is a transverse section through the dead plates in rearof the retort, the section being taken approximately on line iP-4; of Fig. 2; Fig. 5 is av central longitudinal section taken through the rear-endof the retort and ad'- jacent dead plate; and Fig. 6 is a perspective view of the portion of the front wall surrounding the retort.V i

Referring .to the drawing, A represents a furnace* and B the retort of'an underfeed Stoker associated with the furnace.

C is a bridge wall in rear of andat some` yso saddle E shaped to conform tothe bottom of the retort. lt will of course be understood, however, that thepedestal may be formed in any suitablefw'ay.

Vlf/anal F are dead plates arranged at the sides of the retort and extending from the front of the furnace into proximity tothe bridge wall. Y.

G is a third dead plate lying between the bridge wall and the rear end of the members F and F.

By supporting the retort upon a pedestal, it becomes unnecessary tobuild up a wall directly adjacent to the rear end of the retort; but instead, it is sufiicient to provide a 4supporting shoulder at the front of the bridge wall upon whichthe rear ends of the dead plate; may lie, .Such a supporting shoulder' can conveniently be formed by building a shallow wall H of the desired height directly against the front of t-he bridge wall.

As in the patent to which reference has beenmade', the ash pit beneath the dead plates and around the retort serves as a 110 -ioo chamber intoiwhich air'under pressure introduced and from which it flows into the combustion chamber through the t'wyer blocks b at the top of the retort. It will thus4 be seen thatall of the dead plate area in rear of the retort except the narrow strip lying upon the ledge formed by the top ofi the wall Il. is in contact with a constantly changing volume of air so that this portion of the dead plates, as well as that at the sides of the retort, is kept comparatively cool dur ing the operation of the furnace, and the life thereof is greatlyprolonged. Iiurthermore there is a comparatively large free space in. rear of the retort in which the end of the usual pusher rod may play-without fear of meeting with any obstruction. The tine dust which is discharged through the pusher rod opening drops directly into the ash pit and'can readily be removed.

Figs. 4 and 5 illustrate the vrelations between the dead plates F, F and G, as Well as the manner of supporting the front enl of the member G. It will-be seen that the member G is'provided with laterally projecting fianvfes g and g at the sides thereof, these exten ing respectively beneath the adjacent edges of the dead plates I" and F. At the front of the member G is another flange g2 which projects underneath the twyer blocks at the rear end of the retort. A plate K is secured to the rear end ofthe retort so as to project beneath the flange g2 and prevent the front end of the member G from'dropping down.

There is another advantage which may be obtained from supporting the rear end of the retort upon a pedestal. It is a practice to make the retorts in furnaces of this kind shallower at the rearA than at the front so that if the top of the retort is horizonte', the bottom thereof rises gradually from the front to the rear. It is therefore possible to secure a nice adjustment by simply shift ing the pedestal toward the front or towarl the rear and the retort can consequently te pairs set very quickly and without takin to make the vertical dimensions of t e pet.-

estal extremely exact.

Itis ditteult to obtain a tight joint around the Stoker at the point where it passes through the front. wall a of the furnace and heretofore it .has been customary to build a comparatively wide supporting wall across the front end of the fnrnaceso as to secure considerable longitudinal depth to the joint between the Stoker and the wall at this dead plates at this point do not have the benelit ot' the cooling action ot' the air in Athe wind box.

ln accordance with another feature of the present invention, tne entire supporting wall, both at the sides and at the front of the furnace` is made shallow the saine as the rear supporting wall ll. The side supporting` walls are indicated at Il', ll and the front supporting wall at Il?. In order to secure the desired depth of joint at the front, the wall H2 -is provided with an inwardly projecting trough-like section Ils which sur rounds the sides and bottom of the retort but dees not extend laterally farther than is necessary to give the requisite strength to the trough. In this way the front ends of the dead plates are fully exposed on, the underside, except where they rest upon the narrow supporting surfaces, and are consequently subjected to the'cooling influence of the air in the wind box, without in any way detracting from the tightness of the joint around the Stoker or affecting the rigidity of'the setting at this point. It will now be seen that the present invention makes it possible to produce a stoker which can be set accurately with ease and convenience, one "in which the life of the dead plates is greatly prolonged, and one in which the operation is satisfactory and reliable.

While only a .single preferred form of my invention has been illustrated and described, it is not my intention to limit the present invention to the exact construction and arrangement of parts or to the particular type desire to cover all forms and arrangement which fall within the terms ofthe definitions of my invention constituting the appended claims.

lVhat I claim is:

1. In a stoker, a retort having an inclined bottom, and a pedestal having a correspond ingly inclined seat arranged beneath the retort, said pedestal being adjustable longitudinally of the retort, the retort resting upon said seat in the edestal.

2. In a furnace, inc osing walls, a Stoker apparatus including a retort extending through the front wall of the furnace, dead plates at the sides and in rear of the retort, and a shallow supporting wall arranged within said inclosing walls beneath the edges of the dead plates` the front nmember of said supporting wall having a troughlike section projecting inwardly therefrom and extending around the bottom and sides of the retort.

In a furnace, inclosing walls, a 'stoken iso '.Wardly projecting trough-like section extending around the bottom and sides of the retort.

4. In a furnace, a retort, dead plates extending along the sides and across the rear end of the retort, a pedestal arranged beneath the rear end of the retort for supporting the same, and a shallow supporting Wall lying beneath the. outer edges of thedea'd plates at the sides and in rear of the retort, there being also a shallow supporting Wall arranged beneath the front ends of the dead plates, the latter supporting Wall having an lelongated trough-like section projecting inwardly therefrom and extending around the bottom and the sides of the retort, the Walls 'of said trough-like section being shallow mez'r's'ured transversely of the retort.

5. In a furnace, a retort, a shallow Wall extendlng transversely at the front end of l the retort, shallow side 4walls extending lon giludinallyv ot' the retort at some distance' removed therefrom, a shallow rear Wall eX- tending across the rear end of the retort at some distance removed therefrom, said Walls extending` annroxiniately to the top of the retort, a pedestal under the rear end 0f the retort, and dead plates bridging the spaces between the retort and said walls and being supported by said retort and by Said Walls. In testimony whereof, I sign this specitication in the presence of two Witnesses.l

l FRED A. DALEY. Titnesses z WM. F. FRENDENREIGH, RUBY V. BRYDGES.

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