US1265172A - Apparatus for burning pulverized coal. - Google Patents

Description

v. z. CARACRISTI & J. E. MUHLFELD.

APPARATUS FOR BURNING PULVERIZED COAL. APPLICATION FILED SEPT. I. 1916.

1 ,265, 1 72. Patented May 7, 1918.

2 SHEETS-SHEET I- V. Z. CARACRISTI & J. E. MUHLFELD.

APPARATUS FOR BURNING PULVERIZED COAL. APPLICATION HLED SEPT-1.1916.

1 ,26 5 1 72. Patented May 7, 1918.

L 2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

'VIBGINIUS Z. CABACRISTL'OF BRONXVILLE, AND JOHN E. MUHLFELD, OI SCABSDALE, NEW YORK.

.APPABATUS FOB BURNING PULVERIZED COAL.

Specification 01 Letters Patent.

Patented May 7, 1918.

Application filed September 1, 1916. Serial No. 118,014.

VVestchester and State of New York, and the latter a resident of Scarsdale, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Apparatus for Burning Pulverized- Goal, of which the following is a specification.

The resent invention relates to improvements in apparatus for burning pulverized coal, and particularly for use with such furnaces as forging furnaces or the like, where it is essential to obtain an intense heat, properly directed and which may be conveniently and )ositively regulated.

1th these and drawings, and will be hereinafter more ully described with reference thereto and finally pointed out in the claims.

In the drawings:

Figure 1 is a side elevation of our improved burner, showing the same detached from the furnace,

Fig. 2 is a vertical longitudinal sectional view thereof,

Fig. 3 is a vertical sectional view taken on the line 3-3 of Fig. 2,

Fig. 4 is a similar view 4- of Fig. 2,

Fig. 5 is a longitudinal section taken on the line 5-5 of Fig. 2, and

Fig. 6 shows in section the application of our improved burner to a smal forge furnace.

Similar reference characters indicate cor responding arts throughout the several figurcs of the drawings.

Referring to the drawings, our invention comprises a cylindrical fuel feed and mixing chamber 10, to which fuel is fed tangentially under ressure therethrough by means of the ori cs 11, to the furnace, the dotted lines 12 indicating the helical path, which the fuel takes. The pitch of this path, and the length of time the fuel remains in the chamberis determined b the inclination of the nozzle 11 feeding t e fuel into the orifice, and also by the inertia of the fuel traveling at relativelyhigh velocity. An air channel 13 is arranged below the chamtaken on the line other objects in view, our invention is shown in the accompang'mg controlling the flow I ling of the her 10, gradually contracted toward its forward end, and gradually evolving from substantially semicircular cross section as shown in Fig. 3 to rectangular cross-section as shown in Fig. 4. The forward end" extends beyond the end of the chamber '10 and is turned up as at l t. A flange or burner plate 15 is provided surrounding the inner or forward end of the chamber 10 and charm nel 13, and serves to secure the channel to the wall of the furnace by means of bolts passinglthrough the bolt holes 16 thereof.

As s own in Fig. 1 the outer surface of the walls of the chamber 10 and channel 13 within the furnace present a smooth and continuous surface. The upper half of the chamber 10 within the furnace is cut away as at 17.

At the rear or outer end of the burner the channel extends behind the chamber, and is connected to the chamber 10 by a passage 18, through which air for combustion is supplied to the fuel in the chamber, a valve 19 eing provided therein for controlling the I amount of air admitted to the chamber. A

valve 20 is provided in the channel 13 for of air therethrou h. These valves are respectively actuated diy handles 21 and 22 at the outside of the burner.

The fuel emerging from the inner end of the chamber 10 is intermingled and supported by the underlying strata of air from the channel 13. and travels upwardly through the preliminary combustion zone 23' (Fig. 6) and is forced into the furnace through the orifice 24.. The upward turn given to the outlet nel 13 causes the stream of air issuing therefrom to assume the condition of an upwardly-moving column the lower end of which is below, and in advance of, the outlet of the feed and mixing chamber 10. The furnace may be of any well known type, and for convenience of illustration is shown as a small forge furnace and if necessary or desirable, a plurality of burners may be applied to the mace.

- It will be seen that in addition to the mixing and feeding forward of the fuel in the chamber 10, a supporting column of air is supplied to the emerging mixed fuel, whereupon there is a. thorou h interminfuel and air wit in the preminary combustion chamber 23, and as the end 14 of the air-chem mixture rises therein, there is a progressive combustion within this chamber, and at the orifice 24 the combustion is completed.

In this manner the greatest amount of heat energy is produced from. a given amount of fuel and its force is most effectively directed.

We have illustrated and described a preferred and satisfactory form of our invention, but it is obvious that changes may be made therein, within the spirit and scope thereof as defined in the appended claims.

e claim:

1. In an apparatus for burning pulverized fuel, two chambers or channels located one above the other, the lower chamber forming an air-channel which at its outlet end projects beyond the outlet of the upper chamher and has its outlet directed exclusively upwardly to discharge an ascending column of air, and means for supplying fuel to the u pper chamber.

2. In an apparatus for burning pulverized fuel, fuel feeding and mixing means, means for supplying combustion air to the fuel in the feeding and mixing means, and means for supplylng an underlying ascending col- 1mm of air to said fuel emerging from said feeding and mixing means, the air of said column being adapted to be intermingled with the said fuel.

3. In an apparatus for burning pulverized fuel a fuel feedin and mixin chamber 7 h h 3 means for supplying fuel tangentially to said chamber, and directing the same helically therethrough, means for supplying combustion air to the fuel in said chamber, means for controlling the supply of said combustion air, means for supplying an underlying column of air to said fuel emerging from said chamber, said air adapted to be intermingled with the said fuel, and means for controlling the supply of air through said last named means.

4. In an apparatus for burning pulverized fuel, the combination with a furnace having a combustion chamber, of a burner comprising a fuel feeding and mixing chamber,

bustion chamber, to complete combustion atthe end of said chamber.

5. In an apparatus for burning pulverized fuel, two channels for delivering fuel and air respectively, the outlet of the air-channel being below, and in advance of, the outlet of the fuel channel, and directed upwardly to discharge an ascending column of 3.11.

6. In an apparatus for burning pulverized fuel, two channels for delivering fuel and air respectively, the outlet of the air-channel being below the outlet of the fuel channel, and directed upwardly to discharge an ascending column of air adjacent to the fuel outlet.

'7. In an apparatus for burning pulverized fuel, afuel-channel provided with an outlet at its forward end and with a fuel-inlet at its rear portion, an air-channel the rear portion of which communicates with the rear portion of the fuel-channel, and the front portion of which has an outlet 'lo cated below, and in advance of, the outlet of the fuel-channel, and directed upwardly to discharge an ascending column of air, a valve located in the air-channel to regulate the flow of air therethrough, and another valve controlling the communication between the rear portions of the two channels.

In testimony, that we claim the foregoing as our invention, we have signed our names in presence of two subscribing witnesses.

VIRGINIUS Z. CARACRISTI. JOHN E. MUHLFELD.

Witnesses:

J. C. CHAPPLE, C. G. MILLER.

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