US372969A - Bagasse-furnace - Google Patents

Description

2 Sheets- L (NO Mod l.)

BAGASSE FURNAGE No. 372,969.- Patented Nov. 8,1g8'7.

(No Model.) 2 Shets-Sheet '2.

BAGASSE FURNACE.

No. 372,969. Patented Nov. 8, my.

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' UNITED STATES PATENT OFFICE.

FREDERIO COOK, OF NEW ORLEANS, LOUISIANA.

BAGASSE-QFURNACE.

SPECIFICATION forming part of Letters Patent No. 372,969, dated November 8, 1887.

Application filed April 9, 1887. Serial No. 234,320. (No model.)

To all whom it may concern.-

Be it known that I, FREDERIO COOK, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented new and useful Improvements in Furnaces for Burning Bagasse, of which the following is a specification.

This invention relates to furnaces for burning bagasse and utilizing the heat derived therefrom to generate steam in a boiler or boilers, as in my application for Letters Patent, filed May 29, 1886, Serial No. 203,643.

The objects of my present invention are to improve such furnaces, to heat the air-blast by the waste heat in the stack, and reheating such air-blast in its passage to the tuyeres, to pass I the gasses of combustion upward and downward, and then to a transverse waste-heat flue leading to the stack, and to provide an arrangement of passages for the air-blast over the clean-out doors,so that the tuyere-irons can be supplied with air at the front and rear sides of the combustion-chamber These ob jects I accomplish by the features of construction and combination of devices hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure 1 is a vertical sectional view of the furnace; Fig. 2, a sectional view on the line 1) c, Fig. 1; Fig. 3, a plan View on the line 20 w, Fig.1; Fig. .4, a top plan view; Fig. 5, a detail sectional view on the line :0 m, Fig. 1; Fig. 6, a vertical sectional view of a modified construction of furnace; Fig. 7, a sectional view on the line y y,-Fig. 6; Fig. 8, a plan .view on the line 2 2, Fig. 6; Fig. 9, a top plan view of Fig. 6; and Fig. 10, a detail sectional view on the line a 2, Fig. 6.

In order to enable those skilled in the art to make and use my invention, I will now describe the same in detail referring to the drawings, where The letter A indicates the furnace, having in its front end the ovenshaped combustionchamber F, terminating in a contracted pit or base, the front and rear walls of which contain tuyeres O, communicating with a continu ous airpassage, N, extending around the front and rear sides of the pit or base. From the combustion-chamber F lead flues R to the water-tubes S of the boiler, which tubes rest upon a rear bridge-wall, T, a bridge-wall, U, being placed directly above the tubes. These bridge- Walls are continued between the tubes, in order to compel the products of combustion to rise between the tubes in front of the bridgewalls, and to descend between the tubes in rear of the bridge-walls. 7

Under the bridge-wall Tis a transverse flue, L, having rear openings, M. A ir-passages M extend along the bottom wall of the mixing-chamber G and connect with the air-space N around the pit or base. the furnace extends an air-heater, V, containing heating-pipes J and constituting a part'or the base of the stack W. The pipes J 'communicate with a tube, 1, connected with an air-blower, H, operated by an engine, G. The pipes J connect with a horizontal elbow-pipe, K, opening into a transverse passage, I, which is common to all the longitudinal passages M in the bottom wall of the mixing-chamber G. It will be seen that the front and rear portions of the air-space N around the pit or base of the combustion-chamber are connected by passages Q, extending through the furnacewalls over the side doors, P P, which permit the pit or base to be cleaned out, whereby both the front and rear sides of the combustionchamber are supplied with air through the tuyeres O. The air-pipes J are heated by the waste heat passing through the stack W.

The bagasse or refuse from the sugarmill is discharged by the feeder E into the combustion-chamber F, and air is forced by the blower H through tubes 1 into the air-heating pipes J, contained in the heater V, which is a part of the stack W. The air thus heated passes by the elbow-pipe K to the air-passages M and is in its passage reheated and then delivered to the air-space N and tuyeres O. The

.elbowpipe K, extending through the transverse flue L, is surrounded and heated by waste heat in its passage to the stack. The gases of combustion pass out of the combustion-chamber F, through the flues R, to the water-tubes S of the boiler. The bridgewall T and its continuation among the tubes and the upper bridge wall, U, causes the heat to pass transversely among the tubes in an upward direction; hence, a downward direction is given the heat transversely to the rear end From one side of I of tubes, the heat passing into the cross-flue Lthrough openings M. Hence it passes to the air-heater V and stack \V.

X is a back door for cleaning out or renewing any of the water-tubes.

Figs. 6, 7, S, 9, and 10 show a modification of hot-blast burner, as described in previous figures. This isintended asa more simple and less expensive construction, the air-heater V beingless complicated than that shown in Figs. 1, 2, 3, and 4.. The blast is not heated by the air-heater V; but the blast-pipe Y, connected with blower H, enters the stack at Z and passes inside downward, thence through the crossfiues L to the cross-passage A, thence through a series of passages, B, of suitable shape and material, to the air-passages N and tuyeres O. The passages or pipes B are exposed to the direct heat of lower part of mixing chamber G, and the ashes fall through between the pipes into the ash-pits E.

The furnace and its construction and operation and course of the heat and setting are the same as described for Figs. 1, 2, 3, and 4, except that but one clean-out door, P, is shown in pit of burner instead of two.

Figs. 6 and 9 show the engine and blower on top of the furnace for the convenience of not going up and down stairs to stop and start the blast. One man attends to the feeder, the engine, and blower, all being on same floor.

I do not herein claim, broadly, the features constituting the subject-matter of my application, Serial No. 234,319, filed April 9,1887.

Having thus described my invention, what I claim is v 1. In an apparatus forburning damp bagasse as fuel to generate steam, the combination of a bagasse-burner with a water-tube steam-boiler arranged to give an upward and a downward course of the heated gases, a cross-flue within the bridge-wall to convey the waste heat to it communicating with the pit or base by tuyeres, of an air-heater in the stack, a blower connected with said heater, a bridge-wall, a transverse flue in the bridge, an elbow-pipe extending through the hue, and longitudinal air-passages connecting with the air-space around the pit or base and with the elbowpipe, substantially as described.

In testimony whereof Iaffix my signature in presence of two witnesses.

FREDERIG COOK.

\Vitnesses:

GEo. MONTGOMERY, F. F. Tamer-mm).

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