US1329891A

US1329891A - Furnace

Info

Publication number: US1329891A
Application number: US100412A
Authority: US
Inventors: Fitts Edwin
Original assignee: Detroit Stoker Co
Current assignee: Detroit Stoker Co
Priority date: 1916-05-27
Filing date: 1916-05-27
Publication date: 1920-02-03
Anticipated expiration: 1937-02-03

Description

E. FITTS.

FURNACE. APPMCAUON FILED MAY21.1916.

Patented Feb. 3,1920.

33M WWW/Mmmm @Miou/swag latter being preferably porting the protecting blocks for the air UNITED STATES PATENT oEEIoE.

Vof which the following is To all uzom t may concern.

Be it known that I, EDwIX F rrrs, a citizen of the United States of ing at Detroit, in the county .o f 'ayneand State of Michigan, have invented certain new and useful Improvements` in Furnaces, a specification, reference being had therein to the accontipanying drawings.

This invention relates to furnaces and refers more particularly to improvements in furnaces of the type which are provided with side feed stokeis.

In 'some furnaces ,of this general class a fiat arch member is 'employed and it is among the objects of the invention to provide a new and improved arrangement for supporting the flat arch member. Other objects ofthe invention are to vprovide a construction in which the arch member is supported on, the stoker side plate, the

constructed in sections so that the height of the arch niember can be varied in accordance with the size and shape of the furnace,- to provide a construction in which this extension feature is maintained while permitting of a standardizedlower section for the side plate, thus permitting the use of the same lower section for various sizes of furnaces; to provide an improved construction for suptwyers'; to provide a construction in which there is a verticalfwall arrangement for protecting the fairtwyers and side plates from Athe heatv of the furnace, this wall being preferablyl also supported from the stoker side plate; to providea construction in which the 'protecting blocks are indepe'ndently removablefor repair or renewal but vin which vthe blocks are-.locked from displacement when in use and normally held in vertical alineinentwith the inner face of the remainder of' the vertical side wall;

to provide a novel construction and mounting for the upper covering or roof of the arch. and in general to provide an improved furnace construction of the character above referred to.

The invention further resides in various' features of construction and such arrange-` ments and combinations of parts as will more fully hereinafter appear.

In the drawings:

Figure l is a partial vertical cross sec- Anierica, resid- .ing the EDWIN FITTS, 0F DETROIT, MICHIGAN. ASSIGNOR TO DETROIT lSTOKLEB, COMPANY, 0F

. DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN. 4

I FURNA'CE.

1,329,891. Specification of Letters Patent. Patented Feb, 3, 1920.

Application led Hay 27, 1916. Serial No. 100,412.

tionthrough a furnace embodying my invention;

Fig. 2 is a vertical sectional view taken at right angles to 1 centrally'through one of the hangers.

Describing in detail the particular embodiment of my invention shown in the drawings, A designates one of the inclined grates of the furnace, B the combustion chamber and C the refractory arch formtop ofthe combustion chamber. This arch is ofthe type known as Hat arch formed of a plurality of rows of blocks C, C2, etc., supported from I-beams D by means of cross beams D and h rs D2. At the lower ends the ha rs D2 have yokes D3 to which are secured y bolts D, the cross beams D', the heads E of which lit-,in grooves E2 in the arch blocks so that the latter are suspended from the I-beams D. In connection with this type of furnace there is at the side of the combustion chamber a fuel'magazine F from which the fuel is fed to the combustion chamber by stokers F. The inner wall or side plate G of this fuel magazine is'lutilized as a supporting wall for the ends of the arch supporting beams D, and in addition to supporting the arch. the side plate is in the present construction utilized for carrying a protecting wall H. The latter is preferably vertically arranged and is `spaced from the side plate to provide a passage H which forms al connection between the air twyer members I and the air space H2 above the arch. In turn. ther air twyers are provided with a series of protecting blocks I so arranged that their inner faces form substantially a continuation of the inner face of the vertical wall H.

he air twyer members I are preferably formed of a plurality of sections I2 of cast metal. each section having an inclined bottoni I3 and vertical ribs It The connection between these sections and the side plate is formed by hook members J on the twver sections. which engage sockets JV on the .side plate G. The support for the vertical wall H comprises a plate member M which extends across and rests upon the top surfaces of the inwardly extending ribs L. The latterare preferably cast integral with the lower section of the side platec'these ribs being spaced a suitable distance apart.

For holding the refractory blocks I in aline'ment the blocks are provided with re-v cesses M2 whichl register with openings M' tlie'ribs L.

A locking rod 'X extends through the iecesses M2 and openings M', and serves to hold ,the blocks from lateral displacement. f4lso this locking larrangement 'permits of the independent removal and replacement of any of the blocks I', sov that incase of repair orA renewal it is only necessary to withdraw`the roduntil it is clear of the particular block to be removed, after which the block can be removed froni'the support ingmember by drawing the same laterally o from the supporting member.

The support for the blocks comprises a plurality of substantially horizontal prongs O projecting inwardly from the lower portion of the side plate G. These prongs extend into recesses O' inthe'blocks, the arrangement being such that the upper surface O2 of the blocks I will be held against the lower surface O3 of the vertical wall H,

the rear portion of the upper face of the blocks however being recessed to receive the supporting plate member M. It will-be noticed that the inner face of the refractory blocks forms a continuation of the inner face of the vertical wall H, the latter being built up to the arch C. However in place of forming a tight connection between the blocks Q and the arch, there is prefer-- ably a space Q left for expansion but i111 air seal is formed'vertically between the sides of the arch and the face R of the lblocks R. f

In a furnace constructed as above dey scribed, the passage of air from the space above the arch C to the combustion chamber, except through the twyer members .I isy plrevented, 'and counter drafts avoided. oreover this advantageis obtai'neydvwitlifl out supporting the arch upon the refractory; wall. To permit of; the Iuse of the "saine"-y lower portion of the side plate dfor furnaces of kdifferent height, I` preferably form" they.v side plates lGr in sections G and ,G,;

latter of which can be of any desired size.

Thus by a higher plate section G3, the,

arch C can be supported further away from makes such arrangement advantageous while the saine standard lowersection 'G For sealing the space above-*the Ya This floor 'is carried floor S is employed.

D, are a plurality flanges of 'the thereby. l .Y

Thus the entire arch, air twyers and proa, support y the grates, where the length'of thelfumad 'plate and tectingvertical -lwall lare so arranged Il they cali be Supported on the side-plate off h the fuelmgzine, .although the invention incertain of its aspects is not limited supporting lthese members on the magazine sideplate. i v

Oneimportant advantage of the construc- `tion is that the flat arch (which is not a true arch but must have a suspensory support) is supported by metallic suspensory members which in turn are supported by metallic members under the influence of the heat of the furnace but protected fromtlie intense heat. It is a well knownz' fact that the co-eiiicient of expansion of metal and refractory material are quite different so that if the metal were exposed to the same temperature as the refractory the difference in the expansion would cause distortion in the arch. On the other hand if the arch were supported on metal members entirely out of the range of heat the expansion ofthe refractory material without expansion of the metal would cause distortion. With my construction the metal supporting member is so located that it will expand when the refractory material expands but being at a less temperature. This will compensate for the difference in the co-etiicient of expansion with the result that there will be' ver;1 little distortion.

'hat I claim as my ,invent-ion is:

1. Ina furnace, the combination with a, furnace chamber, of a fiat arch therefor having a suspensory support, a side feed Stoker including a. side plate, and "a support for ysaid 4suspensory support carried by said y side plate.

, 2. In a furnace, the combination with a. furnace chamber, of a flat arch therefor, a side 'feed Stoker-including a side plate and for v.said flat arch carried by said `said side plate being formed in sidev plate,

lsect-ions?,to permit of the furnace arch being any desired height above the ,'bottomfo vlievv furnace chamber.

furnace, the combination with a ber, of a flat arch therefor havry support, aside feed stoker. a'y side plate, a support for said 'upport carried by said side dv a vertical protecting wall also yisaid side plate.

yiig-furnace, the combination with a ceclianiber, of a flat arch therefor havsuspensory support, a side feed stoker including, a side plate,

and `a support for said suspensory support carried by said side p1ate,'twyer members carried by said side a protecting vertical wall also carried by said'side plate.

5. In a furnace, the combination with a furnace chamber. of a flat arch therefor, a

` side feed stoker including a side plate and a. support for.4 said flat. arch carried by said side plate, twyer members carried by said side plate and a protecting vertical wall also carried by said side plate. a portion of said vertical wall being formed of independently removable blocks. and a locking member for holding said blocks in alined position.

6. In a furnace. the combination with a furnace chamber. of a flat arch therefor having a suspensory support. a side plate, a vertical protecting-wall carried by said side plate and extendingr upward to the arch member and arranged to form an air tight joint therewith, and means for supporting said suspensory support arranged adjacent to said side plate and under the influence of the heat transmitted therethrough.

T. In a furnace. 'the combination with a. furnace chamber. of a flat arch therefor having a suspensory support. a side plate. a vertical protecting wall spaced from said side plate. means for supporting said wall from said side plate. said vertical wall having an offset portion forming an air tight joint with said arch. and means for supporting said suspensory support located to be under the influence of heat transmitted through said vertical wall.

8. In a furnace. the combination with a furnace chamber, of a flat. arch therefor, a side plate forming a support for said arch. a vertical protecting wall spaced from said side plate, said vertical wall having its inner portion arranged beneath but slightly spaced from a portion of the arc-h member. and said vertical wall having a portion forming a vertical surface of contact with said arch.

9. In a furnace, the combination with a. furnace chamber, of a side feed stoker therefor having a side plate, twyer members carried by said side plate, a Hatarch carried by said side plate, a. floor above said arch spaced therefrom to leave an air space, and a vertical protecting wall carried by said side plate and spaced therefrom to form an air passage connecting the air above the arch with the twyer members.

10. In a furnace, the combination with a furnace chamber, of a flat arch therefor, a side feed Stoker including a side plate, a support for said flat arch carried by said side plate, twyer members carried by said side plate, a vertical protecting wall for said side plate, protecting blocks for said air twyers and means for support-ing said blocks from said side plate with theinner wall of the blocks substantially in alinement with said vert-ical wall.

11. In a furnace, the combination with a'.`

for said blocks and a locking member for removably holding said blocks 'in position on said prongs.-

12. In a furnace, the combination with a furnace chamber and a side plate, of twyer members carried by said side plate, inwardly extending ribs carried by said side plate, a plurality of refractory blocks also supported from said side plate, said blocks and ribs having registering recesses, and alocking rod extending into said recesses for removably holding said blocks from lateral displacement.

13. In a furnace. the combination with a furnace chamber. of a. sectional side plate having the upper and lower sections, members supported b v said lower section. and an inner arch member supported by said upper Section.

14.. In a furnace. the combination with a furnace chamber, of a flat arch directly over said furnace chamber,` said arch comprising a pluralityof independently supported membeis. suspensory supports for said members. and a. general support. for said arch carried by said side plate.

15. In a furnace. the combination with a. furnace chamber, of a Hat arch therefor having a suspensory support, a side feed Stoker including a side plate, a protecting wall supported from said side plate. and means under the influence of heat radiated from said protecting wall for support-ing said suspensory support.

16. In a furnace, the combination with a furnace chamber, of a flat arch therefor, a side feed stoker including a side plate, means for supporting said Hat arch from said side plate, and a. vertical wall having a plurality of independently removable blocks supported on said side plate, and means for locking vsaid blocks from removal.

In testimony whereof I affix my signature.

EDWIN FITTS.