US1857862A - Igniter - Google Patents

Description

May 10, 1932 P E 1,857,862

IGNITER Filed April 2. 1928 INVENTOR SCHUYLEE C. PAGE BY I I A. I

Patented May 10, 1932 UNITED STATES PATENT OFFICE SGHUYLIER 0. PAGE, os noonnsrnn, NEW YORK IGNITER Application filed April 2, 1928. Serial No. 266,836.

This invention relates to igniters for furso constructed that several of the fire bricks naces employingpulverized or atomized fuel. may be removed without perceptibly weak- In the past when it was desired to ignite'or cning' a furnace already in use, to form an cut-in a furnace using pulverized coal the opening in which the unit including the blower for introducing the powdered fuel into igniter may be mounted. This unit includes the furnace chamber was started and the ata plate 5 mounted on the outer wall of the tendant introduced a torch into the chamber furnace by suitable bolts and provided with to ignite the powdered fuel. The torches anintegral Venturi tube6of circular, rectancommonly used consisted of nothing more gular or any desired form in cross-section 1 than a pipe 'or staff with waste dipped in oil which extends into the furnace preferably at attached thereto. Since the interior of the right angles to a stream 20 of pulverized or chamber was almost completely filled with atomized fuel introduced by a blower (not powdered fuel the introduction of a torch of shown) into the furnace. On the front side this kind sometimes caused an explosion of the plate there is provided an integral 15 which blew open the doors of the furnace and Circular sleeve 7 with which there oooperendangered the attendants. \Vhen such an ates a door 8 hinged at 9 and provided with explosion did not take place there was frea suitable latch 10 engaging a projection 11 quently difficulty in igniting the powdered on the sleeve. It will be noted that the door fuel because of the fact that the torch flame is hinged at the top so that it will be closed 20 was not always sufficiently hot to cause the under the force of gravity and the latch 10 fuel to ignite. In addition to these ditliculis so constructed that when the door is closed ties there was usually a considerable. waste of it is locked in closed position, all of which fuel since much of it was blown up the stack is in accordance with safety requirements. or chimney before the furnace could be ig- The front of the door has a rotary damper nited. controlled by the handle 12 so arranged that In accordance with the present invention the supply of air can be regulated at will. it is proposed to employ an igniter with the At the lower side of the unit within the door flame sufficiently hot to cause immediate comthere is provided a chamber 13 in which there plet-e combustion of the fuel as soon as the 'is placed a wick 14 consisting of asbestos blower is started in operation. Another fea-- and thi's'chamber may be equipped with a ture of the invention is that it produces a pipe (not shown) for automatically supflame of such character and area that it is plying it with a predetermined level of oil not easily blown out by-the current of powor liquid fuel as needed. The sides of the dered fuel. sleeve 7 are tapped to receive an air sup- Other features-of the invention will appear ply pipe 15 and an oil supply pipe 16. These from the detailed description and appended pipes terminate in a burner shown in detail claims. in Fig. 3 where the oil is atomized and burned. In the drawings Fig. 1 represents a portion This burner includes a venturi 17 through of the wall of a furnace having an opening which air or steam under pressure escapes therein in which there is mounted an ignition from the pipe 15. Oil or liquid fuel however unit including means for igniting the furnace. escapes from the pipe 16 through a second Fig. 2 is a vertical section on the line 2-2 of venturi 18 in alignment with the first, an ar- Fig. 1 looking in the direction of the arrows rangement which in practice has effected eswhile Fig. 3 is a section through the burner pecially satisfactory carburetion. The outwhich forms a part of the present invention. lot of the second venturi 18 extends into a Although the invention is intended for tube 1.9 terminating directly above the wick use in anytype of furnace using liquid or pul- 14 and having its free edge formed with a verized fuel it is particularly adapted for cufl' or free end turned back within the tube, use in a furnace of the type having a De an arrangement which prevents unatomized Wolf wall for in such a furnace the wall is oil or fuel from running down into the furnace. Openings 20 of any desired number are provided in the cuff portion of the sleeve 19 which openings have proved to be especially effective in use since they serveas .jets through which a richer portion of the mixture passes and burns with a smoky flame not as easily extinguished as the main portion of the flame fed with highly atomized fuel passing through the large opening in the sleeve. These jets project the smoky flame toward the sides of the tube 6 as indicated by the lines 50. In this way if the large flame, indicated at its base by the lines 51, is extinguished the smaller flames at the jets 20 serve to reignite it. An oil supply reservoir (not shown) which is connected to the oil supply pipe 15 is preferably located below the level of the burner. This arrangement can be used without employing a pump since the air under pressure passing through the burner draws a suflicient supply of oil from the reservoir. Such an arrangement overcomes the serious disadvantage of the gravity-feed systems wherein if the cut-oif valves are not properly adjusted the oil supply leaks away into the furnace.

It will thus'be seen that an igniter is provided which is simple in construction and which is reliable and efficient in operation.

What I claim, is:

1. In combination with a furnace having a wall provided with an opening therein, an ignition door unit mounted in said opening, a burner forming a part of and mounted in said door unit. connections from a source offuel and fluid under pressure to said burner, an oil chamber in said unit having a wick therein. said wick being adjacent the outlet of said burner, said unit having an opening permitting access to said burner and said wick, and a door for closing said opening.

2. In combination with a furnace .wall having an opening therein, a unit provided with a Venturi tube extending through said opening and projecting into the furnace, an

atomized-liquid fuel burner for projecting a flame through said Venturi tube, said unit having an opening permitting access to said Venturi tube without disturbing same, and a door for closing-said opening.

3. In combination with a furnace, means for supplying a stream of pulverized fuel into said furnace, an ignition unit in the wall of said furnace, a Venturi tube fastened to said unit, a burner mounted in said unit for projecting a flame through said Venturi tube into and at right angles to the stream of pulverized fuel. said ignition unit having an opening permitting access to said burner, and a door for closing said opening.

having an opening therein, a. door plate mounted on the outer surface of said wall, a Venturi tube integral with said plate and extending through the opening in the furnace wall into the interior of the furnace, a sleeve integral with said plate and extending in the opposite direction from said venturi, a burner having an outlet projecting into said yenturi, fuel and air suppl pipes extending to said burner, a gravity 0 osed door supported on said sleeve and means in said door for controlling the air supply passing therethrou h.-

6. n combination with a furnace wall having an opening therein, a door plate mounted on the outer surface of said wall, a Venturi tube integral with said plate and extending through the opening in the furnace wall into the interior of the furnace, a sleeve integral with said plate and extending in the opposite direction from said venturi, a burner having an outlet projecting into said venturi, fuel and air supply pipes extending to said burner, a gravity closed door supported on said sleeve, and a chamber supported by said plate with a wick therein'ffor projecting a flame adjacent said burner.

In witness whereof, I hereunto subscribe my name this 30th day of March, A. D. 1928.

SCHUYIJER C. PAGE.

4. In combination with a furnace, means for projecting a stream of pulverized fuel under pressure into said furnace, a burner supported by the wall of said furnace, and means for supplying atomized fuel to said

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