US659046A - Coking-oven. - Google Patents

Description

No. 659,046.` Patented Oct. 2, |900. C. G. ATWATER'.

^ COKING' OVEN.

y (Appication led Nov. 7, 1899.)

(No Model.)

E1/Locutor,

lmnllllln QW @W NITED STATES PATENT firmen.

CHRISTOPHER G. ATWATER, OF BOSTON, MASSACHUSETTS.

COKING- OVEN.

SPECIFICATION forming part of Letters Patent No. 659,046, dated October 2, 1900. Application filed November '7, 1899. Serial No. 736,168. (No model.)

To all whom t may concern,.-

Beit known that I, CHRISTOPHER G. AT- WA'IER, a citizen of the United States, residing in the city of Boston, in the county of Suffolk and State of Massach usetts, have invented a certain new and useful Improvement in Coking-Ovens,ofwhich thefollowingisaspecification.

My present invention has especial relation to coking-ovens heated by gas; and the principal object of my invention is the production of a form of oven wherein the coking shall be complete and uniform and one wherein the gaseous fuel is utilized to the best advantage.

In the accompanying drawing I have illustrated a perspective of a portion of one form of furnace made in accordance with my invention.

In coking-furnaces of the type to which my invention belongs it is found that the heat does not affect the coal to be coked in a uniform manner. When the greater part of the coking is perfected and it is time to discharge the completed product, there remains always a more or less conical core of material near the center of the mass which is imperfectly coked, if at all. This core is found near the bottom of the furnace, with its base upon the furnace-floor. I have found that by making the interior space of my coking-chamber narrower at the bottom than at the top I can 0btain a concentration of heat at the bottom so distributed as to do away with the uncoked core above described. My preferred method of embodying this plan is illustrated in the accompanyingdrawing. Herelemployacoking space or oven 1 shaped like a truncated wedge, base uppermost. One advantage of this preferred embodiment of my invention lies in the ease with which the coke is discharged. For this purpose the furnace is provided with openings at both ends, as shown in dotted lines at 2 in the figure. When the coking is completed, the material is simply pushed through the wedge from one open end out at the other.

The doors for closing in the ends of the oven may be made in any one of many ways well known in the art.

The gas for heating is introduced into horizontal passages one over the other by means of successive pipes or burners 3, 4, 5, 6, and 7 on each side of the furnace. The ignited gas passes through the' top passage, thence into the next lower passage, and so on to the discharging-point. This operation takes place on both sides of the oven, as shown. In order to maintain the necessary high temperature, new Volumes of burning gas must be added at intervals in the course of the total circulation, and for this purpose I have shown the burner for each passage. More or less than this may be used, according to circumstances. I have found that the best results are producible by introducing the gas gradually and making the passages successively wider toward the discharge-point for said gases, as illustrated. This gradual enlargement of the ducts provides room for the constantly-increasing volume of gas. I prefer to obtain these results by constructing the sides of the oven of hollow fire-brick sections whose Walls next the coke are inclined in conformity to the incline of the wedge-shaped chamber', while their opposite Walls are at an angle thereto, preferably vertical, as shown. The construction involving the inclined inner faces of the brick passages has this advantage, that it adds greatly to the strength of the structure. Where morethan three passages are used, l have found thatvertical walls are apt to yield under the weight of the arch over the oven when under the influence of the high temperature necessary.

What I claim is- I. In a coke-oven, a coking-space, passages over each other along the sides thereof and burners at intervals for introducing gas gradually into said passages, said passages being successively of increasing cross-section as the outlet is approached.

2. In a coke-oven,- a @cking-space narrowing toward the bottom, passages over each other along the sides thereof, said passages being of successivelygreater cross-section downward, and burners for introducing gas into said passages at intervals.

3. In a coke-oven, a coking-space shaped like a truncated wedge base upward, horizontal fire-brick passages under each other fitted to the sides of said wedge so as to wid en downward in proportion as the coking-space narrows, and burners for introducing gas into said passages at intervals.

CHRISTOPHER G. ATWATER.

Witnesses:

ODIN B. ROBERTS, ELEANOR F. GROLL.

IOO

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