US744905A - Smoke-consuming apparatus. - Google Patents

Description

No. 744,905. PATENTED NOV. 24, 1903. W. G. COURTS.

SMOKE GONSUMING APPARATUS. APPLIOATION FILED M10. 4, 1902.

N0 MODEL.

WITNES S'- V INVENTOR UNITED STATES fPatented November 24, 1903..

PATENr Urrrcn.

IVILLIAM CHARLES COURTS, OF MANCHESTER, ENGLAND.

SPECIFICATION forming part of Letters Patent No. 744,905, dated November 24, 1903.

Application filed December 4, 1902. Serial No. 133,921. (No model.)

To aZZ whom it may concern:

Be it known that 1, WILLIAM CHARLES OoURTs,a subject of the King of Great Britain, and a resident of Manchester, in the county of Lancaster, England, have invented new and useful Improvements in Smoke-Consuming Apparatus, of which the following is a specification.

This invention relates to smoke-consuming apparatus for boiler-furnaces and the like in which air is supplied to the furnace above the fuel charged on the grate, through hollow frames arranged at the sides and above the fire-door; and it consists in an improved arrangement or construction of the nozzles or twyers through which the air passes from said frames into the furnace, the object of the invention being to distribute the air through the whole furnace and direct it more particularly to those parts of the grate and furnace where the greatest quantity of smoke is produced or accumulates and to obtain an intimate mixture of the smoke-gases and air before they reach the fire-bridge.

On the drawings annexed hereunto the improvements are shown applied to an internally-fixed boiler as an example.

Figure 1 shows a longitudinal section of the fore part of the furnace along line '10 x y c on Fig. 2; Fig. 2, a front view of the hollow frames on the right, and a section therethrough on line "a n, Fig. 1, on the left; Fig. 3, a plan of the nozzles and dead-plate, Fig. 1; Fig. 4:, an end view of the nozzles as seen from the inside of the furnace.

At the sides of the door-opening a cast'iron air-channels or hollow frames 1) are arranged which extend partly over the door-opening. Air enters them through openings 0 in the dead-plate (1, provided with flap-valves e or with slides, which are opened when the grate d is charged with fresh fuel and are closed after the fire has become bright. From the frames 12 the air flows through nozzles or tWyers into the fire-box. These nozzles are made long in proportion to their diameter say three to four diameters in lengthin order to impart a definite direction to the jets of air. They may be formed of separate tubes, but preferably all the nozzles on one side are combined in one casting f, which extends into the fire-box above the grate, in order that heat may be stored in them and in the frames 5 while the flaps e are closed and afterward communicated to the air passing through them. The castings f preferably rest upon projecting ledges g 011 the frames 19 and are each held on by a screw h. The several noz zles Z m n o, the number of which may be greater or less,are arranged at different angles to the horizontal and vertical plane in order to direct the jets of air to those places of the grate or furnace where a large development or accumulation of the smoke occurs. For instance, as shown, the nozzle l may be directed toward the center of the crown, the nozzle an upward toward the sides of the same, the nozzle n downward toward the middle of the grate, the nozzle 0 outward toward the furnace-wall. Obviously any other direction which may be found advantageous may be given to these nozzles. By these several jets of air crossing each other at different heights and angles'also a whirling movement of the heated air and the smoke-gases rising from the grate is produced, which promotes an intimate mixture of the air and smoke and the complete combustion of the smoke on the hind part of the grate or behind the fire-bridge.

The conservation of the direction of the several jets of air toward different spots of the fire-box or grate and the mixture of the air and smoke may be further promoted by dividing each jet into two or more jets rotating around the axis of the nozzle and each other. This is effected by inserting into the nozzles partitions 7', formed, for instance, of flatbars twisted around their longitudinalcenter line, so as to produce when inserted into the nozzle double-threaded helical channels of quick pitch. The total area of the nozzle is not materially reduced thereby. Instead of fiat bars bars of cruciform section may be used, which twisted around their axis form quadruple-threaded helical channels. The

longer way the air has to make in passing through these helical channels increases the heating effect of the nozzles and along with the rotation imparted to the jet assists to maintain the direction of the jets of air after they have issued from the nozzles.

In the apparatus represented the air is drawn through the frames 1) and nozzles by the chimney-draft; but obviously it may be forced into them under pressure or sucked or blown in by means of steam-jets.

I claim as my invention 1. The combination with a furnace having a grate and a fire-door, of hollow frames one .on each side of the fire -door and extending several nozzles Z, m, n, 0 inclined at various angles to the horizontal and vertical plane.

3. The combination with a furnace having a grate and fire-door, of a dead-plate d having an opening 0 at each side of the door provided with means for closing the same, a hollow frame b mounted over each opening 0 and extending partly over the door, a casting f fixed to each hollow frame I) and containing several nozzles Z, m, n, 0 inclined at various angles to the horizontal and vertical plane. and bars 10 twisted around their longitudinal center line inserted into said nozzles.

In testimony whereof I have hereunto set my hand in the presence of two witnesses. WILLIAM CHARLES COURTS. Witnesses:

FREDK. J. NAYLOR, EUSTAOE HOOPER TURNER.

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