US406659A

US406659A - Allan mason

Info

Publication number: US406659A
Authority: US
Publication date: 1889-07-09
Anticipated expiration: 1906-07-09

Description

(No Model.)

A. MASON.

APPARATUS FOR BURNING GULM OR PULVERIZED GOAL. I No. 406,659. Patented July' 1889.

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WITNESSES INVENTDR Mwa W q. PETERS, Pholo-Lillwgmpien Wnhmglnn. u.'c,

UNITED STATES PATENT OFFICE.

ALLAN MASON, OF BROOKLYN, ASSIGNOR TO HERBERT H. SANDERSON,

TRUSTEE, OF NEWV YORK, N. Y.

APPARATUS FOR BURNING CULM OR-PULVERIZED COAL.

SPECIFICATION forming part of Letters Patent No. 406,659, dated. July 9, 1889. Application filedMarch 8, 1888- Serial No. 266,556- (No model.)

To 60% whom it may concern.-

' l Be it known that I, ALLAN MAso a citizen of the United States, residing at Brooklyn, in

companying drawings, and to the letters and figures of reference marked thereon, which along with it any yet unconsumed particles form a part of this specification.

My improved apparatus for burning pulverized coal consists of contrivances for maintaining the particles in suspension and general distribution throughout the combustionchamber, together with the air for effecting the combustion, so that the mixture and union of atoms is in process of operation among and throughout the moving particles in all the space and in far greater amount and intensity than as burned in a mass or bed on the grate, with correspondingly more effective or perfect combustion and greater production and intensity of heat in a given space, all as hereinafter described, referencebeing made to accompanying drawings, in which- Figure 1 is a longitudinal sectional elevation of a boiler-furnace, showing one contrivance of apparatus that may be employed for maintaining the suspension and distribution by the cycling currents produced in the furnace by an injecting-blast of air laden with the atoms of coal. Fig. 2 is a transverse section of a locomotive-boiler furnace with the injecting apparatus adapted for that kind of furnace.

In Fig. 1, (t represents an ordinary returnfiue boiler; b, the combustion-chamber of the furnace; d, the fire-door; f, the flue back of the bridge-wa1l g. In such a furnace I provide a pan-shaped deflector h, and when required others 11 j, of refractory material, as shown, or in any approved arrangement, with an injector k for air to be forced in, preferably, at the backof the chamber by a fan Z, or other means, and coal-dust charged into the air-spout by a screw feeder m, or other means, to be carried along-for feeding the furnace and for being mixed and combined with the air and held in suspension for combustion by it. It will'be seen that the blast first impinges on the pan h, locatedalittle above the ash-pit, spreading more or less, but leaving a comparatively still air-space below for reception of the ashes. Then it is turned upward violently by the deflector h, diffusing in the upper space, where it is held up in cycles by the incoming jet below, repeatedly coming in contact with deflectors z' and j, which turn it downward into the incoming blast, which takes and prevents them from falling onto pan h or over its edge into the ash-pit, said pan being narrower and shorter than the width and length of the chamber. It will also be seen that these appliances maybe readily fittedto a common boiler-furnace already in use without material expense of fitting and may be as readily removed. For adaptation of the same .process to the combustion-chamber b of a locomotive-boiler fire-box n the injectingnozzle may have branches k entering near each side from below the grate c, and being suitably upwardly curved to constitute deflectors for projecting the coal upward into the opposite angles, and be thereby deflected so as to meet over the cent-er of the chamber and pro duce gyrating cycles by their counter-action, adapted to maintain the suspension of the coal atoms until consumed. To begin with, fire may be started on the pan h or the coalgrate to produce theheat necessary for igniting the coal-dust, or a torclrmay be introduced through the fire-door.

For the subsequent continuance of the fire the high temperature within the chamber is to be depended on for reigniting the fine particles of coal in case of any temporary suspension due to irregularity in the feeding of the coal; but it is intended that the coal shall be so fine and shall feed with such regularity that when properly adjusted no interruption will occur.

By this method all the combustible matters in the coal will be effectually consumed with greater economy of fuel, and an especial advantage is gained in the total prevention of clinker and slag.

fall in part into the ash-pit through some localities Where the eddies favor it, while some may be carried over the bridge-wall and descend where the cycles have less suspending effect.

I am aware that a fan has been employed as a feeder merely to inject pulverized coal into the furnace upon. the fire-bed; but my invention is distinguished from such a device in that it is specially contrived for projecting the coal into the space above and maintaining it in suspension for combustion in the atmosphere of the furnace.

I disclaim herein the process of burning coal and hydrocarbons in combination described in my application filed March 5, 1888, Serial No. 266,282; also the process of burning culm or pulverized coal, filed the same date, No. 266,281.

WVhat I claim, and desire to secure by Letters Patent, is-

l. The combination, with a furnace-chamber, of an air and pulverized-coal injector upwardly projecting the injected coal into the chambers provided with deflectingsurfaces, as shown, thereby maintaining the coal in suspension during combustion above a still air-space in the lower part of the furnacechamber for reception of the ashes, substantially as described.

2. The combination, with a furnace-chamber, of an air and pulverized-coal injector and deflectors in the chamber upwardly projecting and maintaining the coal in suspension during combustion above a still air-space in the lower part of the furnace-chamber for reception of the ashes, substantially as dethat direct, diliuse, and, with the currents of injected air, maintain the coal in suspension during combustion, substantially as de scribed.

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

ALLAN MASON.

Witnesses:

W. J. MORGAN, A. P. THAYER.