US1388384A

US1388384A - Smoke-consumer

Info

Publication number: US1388384A
Application number: US236907A
Authority: US
Inventors: Smith Cecilia
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-05-27
Filing date: 1918-05-27
Publication date: 1921-08-23
Anticipated expiration: 1938-08-23

Description

W. D. SMITH, DECD.

0. sum. umvsnsm. LEGATEE.

SMOKE CONSUMER.

APPLICATION FILED MAY27,19|8.

Patented Aug. 23, 1921.

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W. D. SMITH, DECD.

c sum, UNIVERSAL LEGATEE.

SMOKE CONSUMER.

APPLICATION FIL'ED MAYZT. l9l8.

Patenwd Aug. 23, 1921.

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- aziz-zzzzam lfifmssses "UNITED I STATES PATENT OFFICE.

WILLIAM D. SMITH, OF MONTREAL, QUEBEC, CANADA; CECILIA SMITH, UNIVERSAL LEGATEE THE ESTATE OF SAID WILLIAM B. SMITH, DECEASED. I

SMOKE-CONSUMER.

To all whom it may concern:

Be it known that 1, WILLIAM D. SMITH, a subject of the King of Great Britain, and resident of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Smoke-Consumers, of which the following is a full, clear, and exact description.

This invention relates to improvements in smoke prevention apparatus for furnaces, and the object is to provide means for preventing the escape from the furnace of the carbon particles which blacken the smoke.

A further object is to increase the efficiency of the fuel by promoting a more perfect combustion of the same, and at the same time retarding the escape of hot gases from the furnace.

The means used to attain these objects are essentially a baflle wall at the rear of the usual bridge wall extending downwardly from the top of the boiler casing to approximately the level of the top of the bridge wall, and a steam sprayer adapted to supply oxygen over the fire and at the same time retard the draft.

In the drawings which illustrate this in-' vention:-

Figure 1 is a vertical longitudinal section of a boiler furnace arranged as hereinafter described.

Fig. 2 shows on the left a partial front elevation and on'the right a partial transverse section on the line 56 of Fig. 1.

lower bricks.

Fig. 4 is a front elevation partly in section of one of the hanging bricks.

Fig. 5 is a perspective sectional view of one of the sprayers.

Fig. 6 is a vertical longitudinal section of a locomotive boiler equipped with the device.

Fig. 7 is a similar view of a marine boiler equipped with the device.

In the drawings, 11 designates a boiler which in Fig. '1 is of the externally fired tubular type in the usual brick casing walls 12, and provided with a furnace 13 of ordinary t pe having at the back a' bridge wall 14 "VV hen the present invention is installed,

Fig. 3 is a perspective view of one of the Specification of Letters Patent. Patented Aug, 23, 19 21,

Application filed May 27,

1918. Serial No. 236,907.

it is preferable to slope the top of the bridge wall at the rear, as shown in Fig. 1. Above the bridge wall and slightly to the rear thereof, a hanging bridge 15 is located, extending from'side to side of the boiler casing. This bridge preferably consists of a series of vertically disposed bricks 16, slotted at the upper end so as to be suspended from a bar 17 the ends of which are embedded in the casing walls,-and'at the same time protect the bar from fire and prevent warping thereof. These bricks 16 are each clamped'between two iron plates 18 by means of bolts 19, the plates being provided with pockets 20 for bolt-heads and nuts, which pockets engage in suitable apertures in the brick. The plates are in addition provided with ribs 21 of any suitable number and arrangemenuwhich are embedded in the brick. It will thus be seen that each brick is supported from top to bottom by the exists between the sides of the boiler and the casing, this space is closed up from the top of the hanging bridge to the top of the casing. These baffle walls, designated 22, are composed of horizontal bricks23, one end of each brick or row of bricks being curved to fit closely against the boiler. The lower brick 24 on each of the walls is preferably in one piece and formed with a rectangular aperture 25 extending longitudinally therethrough. These lower bricks are preferably of such length that they may be embedded at one end in the casing wall. The inner ends of the bricks 24 and the weight of the walls built thereon are supported by'metal the portion of each wall above the horizontal diameter of the boiler acts as a keystone, and supports the portion below by means of the bars 26.

At the front of the furnace, a pair ofapertures are formed one on each side of the center and each lined with a sleeve 28, having an apertured cross bar 29 at the mouth thereof supporting a pipe 30 carrying a sprayer 31 within the sleeve. The pipes 30 are connected to a header 32, which is in turn connected to a steam pipe 33 having a valve 34 therein. The connection between the header 32 and pipe 33 is preferably such that it may be adjusted to'alter the height of the header and thus to alter the inclination of the pipes 30 and the direction of the steam jets issuing from the sprayers 31. The sprayers each consist of a substantially sector-shaped hollow body attached at the small end to the pipe 30, and provided on the curved edge with a plurality of small apertures 35. these'sprayers is such that the line of blast passes between the standing and hanging brid es, as indicated by the line of arrows 36 in Fig. 1. In addition to these sprayers, longitudinal'apertured pipes 37 may be embedded in the side walls of the furnace, and

i supplied from the steam pipe 33, valves 38 being provided to control flow independently of the sprayers. In Fig. 6, the invention is shown applied to a locomotive boiler. The hanging bridge 15 may be placed in any suitable position, and made of a size in accordance with the dimensions and proportion of the furnace. The bridge may be hung'right up to the crown sheet of the furnace, similarly to Fig. 1, or a short distance below the crown sheet, the intervening space being either free or closed by a wall 22. The sprayers are let into the front of the furnace and are preferably formed similarly to the fire door opening, as shown in dotted lines. I

In Fig. 7, the invention is shown applied to a marine boiler or any boiler of the internally fired return tubular type, the installation being identical with that shown for the stationary and locomotive boilers. It will also be noted that in the internally fired types of boiler. the longitudinal blast pipes 37 will require to be inclosed in a brick casing 40, to prevent their being burned. The arrangement of steam pipes for both front and side sprayers will be the same as shown in connection with a stationary boiler.

In all the forms, the hanging bridge and walls above it if such exist will prevent any up-draft and force escaping gases to travel in close proximity to the fire. The blast from the front and side sprayers forms a curtain of steam over the fire, which aids in keeping the gases down. Moreover, the steam readily decomposes in the great heat and yields oxygen with which the incan- The preferable adjustment of cooled, is driven back against the fire with sufiicient oxygen supplied to support combustion, so that the products of combustion leaving the furnace are almost entirely free from carbon particles, which impart the heavy black color to the smoke.

In addition to eliminating or greatly reducing the smoke, the fuel is more perfectly consumed, and the draft being retarded by the hanging bridge wall is longer in passing through the boiler tubes, and therefore has more opportunity to yield up heat. Carbon deposits in the tubes are also prevented, so that more of the heat reaches the water.

Having thus described my invention, what I claim is 1. In a device of the class described, the combination with a boiler and furnace, of a hanging bridge at the back of the furnace composed of vertically disposed bricks, plates on each side of each brick bolted together through-the bricks, and a bar supporting all of said bricks.

2. In a device of the class described, the combination with a boiler and its furnace, of a bridge wall near the rear of the furnace disposed to hold the draft down in proximity with the fire, said bridge comprising a bar passing out of the furnace at the sides thereof, a plurality of bricks slotted at their upper ends to engage said bar, plates on opposite sides of each brick, bolts connecting said plates together through the brick, hollow bosses embedded in the brick formed on said plates for the reception of bolt heads and nuts and ribs on said plates embedded in the brick and arranged to hold the bricks against disintegration.

3. In a device of the class described, the

combination with a boiler, and furnace hav.-'

ing a standingbridge wall at the rear thereof, of a hanging bridge wall'at the reariof said standing bridge wall comprising a transverse bar embedded at its ends in the furnace side walls, a series of vertically disposed bricks recessed at their upper ends to receive said bar and adaptedfto be independently hooked on to and unhooked from said bar, and transverse walls above said hanging bridge wall filling the space between the boiler and easing, the lower edge of said hanging -bridge wall being on a level with the top of the. standing bridge wall.

4. In a device of the class described, the combination with a boiler and furnace, of a hanging bridge at the rear of the furnace,

transverse walls above said hanging bridge intermediate bricks between the upper and wall closing the space between the boiler and lower bricks.

its casing above the hanging bridge Wall, In witness whereof, I have hereunto set said transverse Walls comprising lower my hand, in the presence of two witnesses. tubular bricks, a bar passing through said WILLIAM D. SMITH. bricks and following the contour of the Witnesses:

boiler, bricks above the horizontal center of S. R. W. ALLEN,

the boiler holding said bar in position, and G. M. MORELAND.