US784075A - Water-tube boiler. - Google Patents

Description

PATENTBD MAR. '7. 1905i W W. SHILLING.

WATER TUBE BOILER. v APPLICATION FILED AUG. 6, 1904.

3 SHEETS-SHEET 1.

No. 784,075. PATENTED MAR. 7, 1905. W. W. SHILLING.

WATER TUBE BOILER.

APPLIGATION FILED AUG. 6, 1904.

3 SHEETS-$113111 2.

W. W. SHILLING.

WATER TUBE BOILER.

APPLICATION FILED AUG. 6, 1904.

PATENTED MAR. 7, 1905.

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WATEFt-"TUBE BCHLEW.

SPECIFICATION forming part of Iletters Patent No. 784,075, dated March '7, 1905.

Application filed August 6, 1904. Serial No. 219,730-

To all whom it may concern:

Be it known that LlVILLIAM WVARREN Suit.- LING, a citizen of the United States, residing at Sharon, Pennsylvania, have invented certain new and useful Improvements in l Vateu Tube Boilers, of which the following is a specification.

My invention relates to steam-boilers in which the water-tubes are arranged vertically; and the object of the invention is to bring the hot products of combustion into more intimate contact; with the tubes and drums.

in boilers now in use spaces are left between the nest of tubes and 'the interior walls of the furnace, so that theproducts of combustion will pass up these spaces as affording a path of least resistance, and thus will not come in contact with the tube in the interior of the group of tubes. My aim is to overcome this defect, and I accomplish this by extending the crown of the combustion-chamber beyond the interior wall of the furnace and by providing battle-plates at different points in the furnace to direct the products from the sides thereof into the nest of tubes and against the sides of the drums.

The invention includes the construction, arrangement, and combination of parts hereinafter described, and particularly pointed out in the claims.

The invention is illustrated in the aceon1panying drawings, in whicl Figure l is a vertical sectional view of the invention. Fig. 2 is a front view, partly in section. Fig. 3 18 a horizontal section taken just above the tube-drum. Fig. 4 is a view showing the strengthening-bars for the tubedrums.

in the drawings, 1 is the vertical portion of the furnace in which the boiler is placed, and 2 is the combustion-chamber having the grate 3 therein. The vertical portion 1 is shown rectangular in cross-section, and doors 4: may be placed at suitable points in the walls of this portion for the purpose of cleaning the water-tubes.

The crown of the combustion-chamber 2 extends a distance into the interior of the vertical portion 1, and the front wall of the vertical portion is made thicker immediately above this, as shown at 1, for the purpose hereinafter described.

Doors 5 are provided in the front of the combustion-chambm' tor the admission of fuel and removal of ashes.

The boiler consists of an upper tube-drmn 6 and a lower tube-drum 7, connected by tubes 8, arranged in parallel rows, as shown in Fig. 3. Above and parallel with the upper tubedrum 6 are two steamalrums 9 10, arranged one above the other. The lower steam-d rum 9 is connected with the upper tube-d rum 6 by two steel nozzles 1.1 11. l)irectly above these connections the upper steam-drum .10 is eonnected with the lower steam-drum E) by two like nozzles 12 12, and at the top and in the center of the upper steam-drum is a nozzle 13 for the outlet of steam. in the lower steanr drum, at each end, between the openings for the lower and upper nozzles, are baille-plates 1ild, which cause the steam to travel around the ends of these plates and come in contact with the hot surface of the d rum and also prevents direct passage through the drum. The two tube-drulns (i and 7 extend through the briclnvork, and around the top of the upper tube-dru1n suliicient space is allowed in the brick walls for expansion. This space is filled with asbestos fiber, (shown at 15.) The boiler is suitably supported in the fouiulation-walls under the ends of the lower tube-drurn.

Battle-plates 16 are arranged on opposite sides of the interior walls of the vertical portion 1 and project inwardly toward the tubes and drums, thus dividing the space containing the boiler into chambers.

From the (.lrawings it will be seen that the outer rows of tubes bear against the crown 3 and the edges of the battle-plates.

The heat from the combustion-chamber is forced by the crown among the tubes, and a part of it passes into the space on the opposite side. Here it is caught by the tirst baffle-plates and directed back among the tubes. The second and third pairs of bafiie-plates hold it in among the tubes until it reaches the up per tube-drum, where it escapes at the sides around this d rum and is caught by the battles between the tube-drun'i and the lower steamdrum and thrown under this drum, passing around the drum, is again caught by the baffles between the two steam-drums and thrown under the upper steam-drum, after which it passes around this drum up to and through the smoke-stack 17. The last two pairs of bafiies are arranged opposite the connectingnozzles of thedrums, so as to direct the heat to the bottoms thereof.

A hood 18 connects the stack to the furnace. This hood is made of heavy plates drawn in at the top to fit the base-ring of the stack, which is square at the bottom and round at the top. The bottom of the hood is flanged out to rest on the brick-setting, as shown at 19, and is suitably connected thereto.

The space opposite the combustion-chamber between the tubes and the outside wall below the first pair of baffle-plates is for the purpose of assisting in the distribution of heat around the base of the tubes. The crown of the combustion-chamber extends up to the tubes and is made high enough to allow the heated gases to pass among and through them and at the same time low enough to force the heat doWn to the base of the tubes and into the chamber beyond.

In order to maintain the heat perfectly distributed among the tubes their whole length, the pair of baffles just under the upper tubedrum are placed at a point where the area of the outlet at both sides is a little less than the area of the smoke-stack, thereby insuring equal draft around each side of the drum.

Platforms 20 are placed around the vertical portion to facilitate access to the doors.

The flat surface of the tube-drums is reinforced between every row of tubes with a caststeel crown-bar 21 bolted to the bottom of said drums, as shown in Fig. 4.

The front wall of the furnace, it will be noticed, over the combustion-chamber is sup- 1 ported by I-beams. Over the crown of the l combustion-chamber there is brickwork built up which serves to protect the I-beams from the heat of the furnace. This brickwork is in the form of an arch and supports the lowermost baffle-plate.

I claim as my invention 1. In a steam-boiler furnace, an upper and lower drum, tubes connecting said drums, a steam drum placed above the upper tube-drum and connected therewith, and baffle-plates placed opposite the junction of said drums for directing the hot gases against the bottom thereof, substantially as described.

2. In a steam-boiler furnace, upper and lower drums, tubes connecting the said drums, a steam-drum placed above the upper tubedrum and connected thereto, baffle-plates arranged opposite the junctions of said drums for directing the hot gases against the bottoms thereof and a stack for carrying off the gases after passing around the drums, the opening in said stack being of greater area than the opening between the upper tubedrum and the first pair of baffles below the same, substantially as described.

3. In combination in a steam-boiler furnace. the upper and lower tube-drums, tubes connecting them, the crown of the combustionchamber extending inwardly to the tubes, the metallic beam-support for the front wall of the furnace extending across the combustionchamber, the baffles extending from the walls of the furnace to the tubes and brickwork at 1 over the projecting end of the crown, said brickwork extending to the lower baffle and supporting the same and in rear of the iron beam to protect the same, substantially as described.

In testimony whereof I atfix my signature in presence of two witnesses.

WILLIAM WA ltltEN SHILLING. Witnesses:

A. IVILLIAMs, K. H. BUNDEL.

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