US1029605A

US1029605A - Continuous heating-furnace.

Info

Publication number: US1029605A
Application number: US51906609A
Authority: US
Inventors: Asa W Griffith
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-09-22
Filing date: 1909-09-22
Publication date: 1912-06-18
Anticipated expiration: 1929-06-18

Description

A. W. GRIFFITH. CONTINUOUS HEATING PURNAGE. APYLIOATION FILED SEPT. 22, 1909.

1,029,605., Patented Jun@ 18, 1912.

2 SHEETS-SHEET l.

A. W. GRIFFITH.

CONTINUOUS IEA"1Il\TGI FURNAUE. APPLICATION IILBD SEM'. 22, 1909.

Patented June `18, 19,12.

2 SHEETS-SHEETZ.

` WWNESSES INVENTOR awww@ ASA W. GRIFFITH, YOUNGSTOWN, OHIO.

CONTINUOUS HEATNG-FUBNACE.

' Specication of Letters Patent.

Patented June 18, 1912.

Application tiled. September 22, 1909. Serial No. 519,068.

To all 'whom it may concern:

Be it knownthat I, ASA W. GRIFFITH, of Youngstown, in the county of Mahoning and Stateof Ohio, have invented'certain new and useful Improvements in Continuous portion of the combustion chamber.

My of coal tired heating furnaces and more particularly relates t-o the construction of the combustion chamber of such furnaces.

The object of the invent-ion is to provide a furnace having improved means by which the fuel is uniformly distributed in the combustion chamber and by 'which ashes and 'clinkers are removed from the combustion chamber.

A further object lf. the invention is to provide means by which the roof of the furnace is protected and unburned gases escaping from the fuel bed are burned.

vA. further object' of the invention isto provide an improved construction of the ash hopper by which loss of Aunb'urned coal is prevented. i A still further object of my invention is to provide an improved twyer or wind box 4u on water cooled pipes Vwith the opposite ends'of the bricks formbottom of. the furnace' opposite the charging door is provided with -a water cooled sole vblanks heated in the f ture.

construction by which fusingI of clinkers to the furnace wall is prevented and overcome.-

In the drawings '2 represents the discharge end of a coal ltired horizontal heating -furnace having a. roof 3 which is suspended 4 which engage ing the roof. The

plate 5 onwhich the furnace are moved through the discharge door of the furnace.

. 'At one end of the furnace 2 is' a rectangw' lar combustion chamber 6 which as shown extends entirely across the width tof the furnace the combustion .cliambebeing built vinvention'relates to the construction cf the `furnace struc' The lower` end :ofY the combustion p chamber 6 is carried upon asuitable frame work '7 whichin. turn is supported upon posts or columns 8, so as to give access to the interior vof the bottom portion of the chamber 6 from all sides. of the chamber 6 terminates in a downwardly and inwardly sloping ash hopper 9, the sloping sidesvpreven'ting passage of unburned fuel into the water sealed ash pit 10. The lower end of the ash hopper 9 eX- tends downwardly below the level of the Water overfiow outlet 12 in the ash pit 10, so as to form a water seal when the furnace is in operation. L Located in the roof above the central portion of the combustion chamber 6 is a rectangular opening 13 which communicates with the,

of the furnace. At one side of and near the upper end of the chute 14 isa transverse opening 15 through' one side wall which communicates with the lower smaller end of the fuel hopper 16. The transversely extending opening 15 is provided with a longitudinal movable charging plate 17 which is adjustably secured to an actuating The lower endcharging chute 14 through which .y fuel 1s charged into the combustion chamber device 17, the actuating device being connected to any suitable driving motor.

The fuel charging mechanism issupported upon beams 18 which .are carried on suitable supports located at opposite ends of the combustion chamber.

The top of the upper end of the opening 144 is yprovided wit-lr a series of covers 19 which are removably secured in place so as to give access to the interior of the combustion chamber through the opening 14:

whenever found necessary or deslrable.

The ends of the roof bricks of the fur nace defining the width of the opening 13 are carried on water cooled pipes 20; which serve to lengthen the life' of the roof at this point by reason of the cooling effect o f the water. I

Located above the ash pit 10 1n tlie lower end of the combustion chamber 6 is a twyer rbox or wind box 21, the sloping top surfaces of which are provided with a series of rectangular openings 22 through which air under pressure'is delivered to `the -fuel bed in the combustion chamberand located in the bridge wall 23 of the furnace is a reef` tan lar wind box 24 having openings 25411() lea ing therefrom at suitable intervals in the top surface of thegbridgemyvall 23. The

` apparent to those skilled in the art.

copies of this patent may be obtained fo'r ve cents each, Washington, D. G

in the combustion chamber.' sure is supplied to the under o ffburning fuel from the twyer box'21, ex-

wind boxes `21 and 24 are connected to a supply\ ofair under erably being preheated.

A-t the upper outer end of the combustion chamber v6 is a pipe 26 having a series of branches 27 which communicate with open? ings 28 extending through the end wall of the furnace at a point slightly belo'w the inner surface of the roof. The pipe 26 e011-, kiieets with a' source of preheated air to supply air to the furnace immediately below the roof so as to complete the combustion of unburned also serves to protect the roof 'and prevent its becoming excessively heated.

Suitable plug holes 29 are provided in the combustionchamber for cutting or slicing the fire and breaking up clinkers during the firingoperations. I ,In the operation of furnaces built in accordance with my improved construction, the coal is fed from the hopper 16 into-the chute 14 by means of the pushers 17. The coal or other fuel thenY drops vertically into the cent-ral portion of the chamber where it becomes'evenly distributed over the surface ofthe combustion chamber. The coal being burned is supported on the ashes whichrest in the ash pit 10. 'As the ashes and clinkers collect in the furnace, they are raked out through the ash pit from all sides `of the combustion chamber, in this way causing an even descent of` the column of burning fuel Air under pressi`de of thebed tending across 'the width'of -the furnace through the air holes 22. Air is also provided,y preferably in a preheated condition, to the under side of the gases passing into 'the furnace 2 from t-he wind box24L through the openings 25 in the bridge wall 23.- Preheated air 1s also led 'into the upper portion of the furnace through the openings 28 and by passing along the underside `of the furnace roof 1n a thin sheet, efficiently protects the furnace roof from excessive heat and also causes the combustion of any unburned gases escaping upwardly, vfrom the 'combustion chamber,'and in this way greatly increases the life and efficiency of the furnace.

The advantages of myv invention will be The apparatus is simple and easily kept in repair. The life of such furnaces is very greatly lengthened while theheating capacity of the furnace is largely increased.

Modifications in the construction and arrangement of the parts may be made without departing from the spirit and scope of my invention as defined in the claims.

I claiinz. a

1. A. heating furnace including an upright pressure, the air `prefgases in the top of the-furnace and g rate sides,

' with the c combustion' chamber, a substantially horizontal heating chamber leading from the up' per portion "of the combustion chamber throughout the width thereof, and a wind box in the lower chamber substantially midway between the front and back thereof and below the heating c of the combustion chamber, said wind box having upwardly converging front and rear perforatesides, the roof of the combustion chamber havin acharging opening therethrough exten ing the f full 'width of said chamber and located in alinement with the -wind box, substantially as described.

y2. A heating furnace including an upright combustion chamber, a substantially horizontal heating chamber leading from the upper portion of the combustion chamber throughout the width thereof, a Wind box in the lower portion of thecombustion chainber substantially midway between the front and back thereof and. below the heating chamber and extending the full width of the combustion chamber, said wind box having upwardly converging front and rear perfothe roof of the combustion chainber having a charging opening therethrough extending the full lwidth of said chamber and located in alinement with the wind box,

ortion of the combustion hamber and extending the full width f and means for maintaining ai sheet of air against the under side of the roof of the furnace, substantially as described.

3. A heatin .furnace including an upright combustion chamber, a substantially horizontal heating chamber leading from the `upper portion of the combustion chamber throughout the width thereof, a wind'box 7 in thel lower portionvof the combustion chamber substantially 'midway between the front. and back thereof andv below 'the heating chamber and extending the full widthl ofv 'the combustion chamber, said wind box hav- .ing

upwardly converging front and rear perforate sides, the roof of the combustion chamber. having through extending the full width of said chamber and located in alinement with the wind box, a charging chute communicating" arging opening 'throughout the length thereof, a. feed hopper at one side of the chute, there being a passage leading from the hopper through one sideof the chute throughout the horizontal rlength thereof, anda mechanical charger working in the passage, substantially as described.

In testimony whereof, I have hereunto set. my hand.

ASA w. GRIFFITH.'

Witnesses: v

JOHN HULST, I A. C.' Coox.

by addressing the "Commissioner of Patents, i,

a charging opening there-