US1433903A - Oil and coal-dust furnace attachment - Google Patents

Description

C. D. MOSHER. OIL AND COAL DUST FURNACE ATTACHMENT.

APPLICATION FILED OCT- 25-1919- 1,4:33,903. Patented Oct. 31, 1922.

3 SHEETSSHEET' 2- INVENTOR Charles E Mosker ATTORNEY C. D. MOSHER. OIL AND COAL DUST FURNACE ATTACHMENT.

APPLICATION FILED OCT 25, 1919' 1,433,903. Patented Oct. 31, 1922 3 SHEETSSHEET 2.

INVENTOR Charles 17. Mosfier ATTORNEY c. u. MOSHER. OIL AND COAL DUST FURNACE ATTACHMENT.

APPHCATION FILED OCT. 25. 1919. 1,43 3,903. I Patented Oct. 31, 1922.

INVENTOR Charles 17. Masher TTORNEY atented Oct. 31, 1922.

UNITED STATES CHARLES D. KOSHER, OF NEW YORK, N. Y.

OIL AND COAL-DUST FURNACE ATTACHMENT.

Application filed October 25, 1919. Serial No. 333,884.

To all whom it may concern:

Be it known that I, CHARLES D. Mosnnn. a citizen of the United States, residin at New York Cit in the county of New ork and State of ew York, have invented certain new and useful Improvements in Oil and Coal-Dust Furnace Attachments, of which the following isa specification, reference being had therein to the accompanying drawing.

My new invention relates to improvements in furnaces for burning coal dust or a mixture of coal dust and fuel oil tar or other similar fuel and more partcularly has reference to and is illustrated in the accompanying drawings in its application to a steam generating plant but may be-applied to metallurgical or other furnaces.

Referrin to said drawings, 1 have illustrated in ig. l in side elevation partly in section a suitable form of steam plant emmodying an application of my invention. Fig. 2 is a front elevation of the same showing only art of the perforations in the damper. ig. 3 is a cross-section looking 7 down upon the line 3-3 of Fig. 1. Fig. 4

is an enlarged section of the furnace on the line 4-4 of Fig. 1 looking towards the front. Fig. 5 is a view lookmg down upon the line 55 of Fig. 2; and Fig. 6 is a view looking from right to left at the damper 27 shown in Fig. 1, parts and some of the per-.

forations being omitted.

Referring now more particularly to Fig. 1; 5-6 indicate the back and front walls respectively of the steam plant provided with the usual drums 7-8 at the top and bottom connected by the tubes 9 separated by the bame wall 10. 11 indicates coal dust pockets or hoppers containing the fuel to be burned which fuel may be fed in afan shaped stream by a jet of high pressure air, and 12 indicates a suitable motor upon a bracket 13 for driving the Worm feed 14 by suitable chains such as 16. r 17 indicates a suitable outlet or flattened nozzle for the coal dust fed by the worm 1t and is penetrated by the air supply tube 18 centrally mounted therein and the air being supplied thereto under pressure discharges the dust as indicated by the fan shaped stream 19 against the rear of the fire brick perforated structure 20.

21 indicates a blower provided with an out let 22 which supplies air to the rectangular channel 23 surrounding the )it 24 into which any noncombustible material such as ash and clinker are rojected out of the combustion zone and eposited upon the bottom 25 which may be dumped as re uired by operatmg; the lever 25'.- The brie walls forming the channel surrounding the pit and combus tion chamber becomes highly heated and thus the air in the rectangular passage 23 is thoroughly heated by contact with the brick walls before entering the chamber 26 where it rises behind and passes through the perforations 27' in the dampers 27 which regis ter with the perforations in the late 40 which in turn register with the per orations in the brick. When the dampers are open the air passes through the perforated brick hearth 20 in numerous small jets which, are projected directly up against the down wardly pouring blast of air and fuel dust which thereupon becomes ignited, as the perforated brick hearth becomes heated to incandescence which also further heats the air in passing through the many small channels or perforations. With a proper adjustment of the dampers the air jets and blast of fuel on meeting oppose each other and are practically brought to a state of rest so that the gases of combustion may pass ofi' practically at right angles to their original direction across the furnace 28 among the boiler tubes 9 from where they rise between the tubes and over the top of the baffle wall 10 and downwardly finally escaping through the flue 29. The ash slag or other noncombustibles that are projected downwardly with the fuel on account of their greater weight than the gases of combustion continue by their greater momentum downwardly and are deposited into the pit from where they are dumped as they accumulate from time to time as required. The air in passing around the channel in the furnace walls surrounding the pit absorbs the heat from the hot slag deposited there and cools it from its plastic form to a caked substance in which condition it can be easily dumped as required by operating the lever 25 controlling the dumping bottom 25.

The dampers 27 are attached by arms 30 .to the shaft 30' which is carried on the bearings 30" secured to the front of furnace. A geared quadrant 31 meshing with the worm 31 is also connected to the shaft 30? enabling the dampers 27 to be regulated by turning the crank 31" connected to the worm 31'. the holes 27 in the damper 27 registering with the holes in the plate -10 supporting the perforated hearth 20. Suitable counterweights such as 32 are connected by arms 33 on the opposite side of the shaft 30 thereby balancing the weight of the dampers 27 and enabling them to be easily adjusted.

Peep-holes such as 34 are provided for observing the action of the combustible 1n the furnace chamber 28.

Of course it will be understood that various modifications will be made in the construction and arrangement .of parts without departing from the spirit of the invention as claimed.

I claim: 7

1. In a furnace of the class described, an inlet for fuel a fire brick structure having perforations for admitting air in opposition to the fuel discharged from said inlet, and dampers immediately adjacent thereto for varying the area of said perforations.

2. In a furnace of the class described, an inlet for fuel a fire brick structure having perforations for admitting air in opposition to the fuel discharged from said inlet, and dampers immediately adjacent thereto for varying the area of said perforations, said perforations extending inwardly and upwardly. a 1

3. In a furnace of the class described, an inlet for fuel a fire brick structure having perforations for admitting air in opposition to the fuel discharged from said inlet, and dampers immediately adjacent thereto for varying the area of said perforations, said perforations extending inwardly and upwardly, said fire brick structure at an angle to the vertical of said furnace.

4. In a furnace of the class described, an inlet for fuel a' fire brick structure having perforations fOI' jQdIIIiitlng air in opposition to said fuel therefor and dampers immediately adjacent thereto for varying the area of said perforations, said perforations extending inwardly and upwardly, said fire brick structure at an angle to the vertical of said furnace, and in combination therewith means below for accumulating the unburnt products and for absorbing the heat therefrom.

5. In a furnace of the class described, a tire brick structure at the front having perforations through which air is adapted to enter the furnace, means for discharging fuel across the inner surface of said structure and dampers adjacent the outside of said structure for varying the area of said perforations.

(3. In a furnace of the class descrbed, a fire brick structure at the front having perforations adapted to discharge air inward and upward into the furnace, means for dis charging fuel downward across the inner surface of said structure in opposition to the air entering through said perforations and dampers adjacent the outside of said structure for varying the area of said perforations.

In testimony whereof I hereunto afiix my signature.

-.CHARLES D. MOSHER.

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