US1040895A - Channel-furnace. - Google Patents

Description

A. H. COWLES.

CHANNEL FURNAGE.

APPLIOATION FILED 111111.19, 1912.

Patented Oct. 8, 1912.

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" ATTORNEY.

'ff UNTTED sTaTEs PATENT oEEIoE.

ALFRED H. COWLES, OF SEWAREN, NEW JERSEY, ASSIGNOR TO THE ELECTRIC SMELT- ING 8c .ALIIUIVI'INUM, COMPANY, OF SEWAREN, NEW JERSEY..

l'. CHANNEL-EURNACE.

'Specification of Letters Patent. j Application led March 19,1912. Seria1 No. 684,835.

Patenteaoct. s, 191.2.

To all whom 'it may concern.

"Be it known that I, ALFRED H. Cowmss, a

y citizen of the United States. anda resident ,fication of Sewaren, in the county of Middlesex'and State of New Jersey, have invented certain new and useful Improvements in Channclg furnace.

. 1t relates particularly to ways and means 'for preventing deleterious gases that may be formed in the upper part of the furnace from penetrating below the car body and attacking the corrodible parts of the cars and of the furnace and vestibule.

The object of the invention is to provide.

a lfurnace in which may bc carried out my process for making hydrochloric acid and alkali-Silico-alu1ninate, set forth in my copending application Ser. No. 521,692, filed October 2d, 1910.*

ln carryingout my process it is necessary that the spaces above and below the cars, or trucks, be isolated from each other, so that the injurious gases be kept in the upper part of the furnace, both while the cars are passing through the furnace and also while a new car is being introduced into the combustion chamber from the vestibule.

I`o carry out my present invention, I have devised several different methods, among which is the one forming the subject matter of the present application.

Tn the `accompanying drawings is shown, simply by way of example, and as illustraing the basic idea, means forvgenerically carrying out my invention, and in the draw ings Figure 1 is a general elevation of a channel or tunnel furnace. showing a vestihule and an air supply; Fig. 9 is a longitudinal section through the vestibule and a portion of the furnace; l? 3 is a vertical cross-section through the furnace, along the line cava, of Fig. Q; Fig. 4 is a general lonf 5t)y gitulinal section through thefurnace, show;-

20 indicates the material composing ing baffles, air supply, etc.; Fig. 5 shows they preferred form of baffles, and Fig. 6 shows the balles attached to the moving car.

Tn the drawings: 1 is the furnacel provided with the vestibule 2; 3 are rails .on which run cars 4:; 5 is the transfer truck on. which `the cars 4 are brought into thevestibule over thetracks 6; 7 are rails on thet'opf thetruck 5, on which rests the ear 4,the rails 7 being on the saine level with the rails 3 in the furnace. Vhen the cars 4; are in the furnace they divide it into two parts, one 8, above, the other 9, below the car body, and the lower part is generally provided with a car pit 10; Sa, 9, and 10 are corresponding parts of the vestibule; 11 is a suction fan located at the top and near the entrance end of the furnace, for exhausting the hydrochloric acid, when my process is'used.

.12 is a blower, or equivalent'device for supplying gases, or air, under pressuretol l the portion of the furnace below. the .car body; 13 `is the pipe supplied by the blower 12,. and it is shown as located near the center ofthe furnace, dividing and running to.- ward each end of the furnace; 14. are@ bafflesl dividing the car pit into any de.l sired number of sections. These baffles are'r preferably .made of sheet-#metal mounted to swin as shown in Fig. 5, the lower part of the affle being weighted, as at 15,. In Fig. 6 the' baiiies are shown as directly mounted on the car body. From the air supply pipe 13 there branch ofi' short pipes 16, which communicate with each section of the car pit formed by the baflies 14:; 17 indicates valves or other means for controlling the pressure of the air (or gas)` admitted totho various parts of the car pit; 18 are the -pipes supplying the fuel, and 19 is a pipe for blowing into the exit end air and steam; the charge; 21 are a series of curtains or aiiles located in the upper part of the furnace and fitting quite closely to the load on the car 4 forming a practically sufficient seal Vfor the gases in that part of the furnace; 23 is the door leading from the vestibule into the furnace proper, and 24, a means for openings and closing said door.

25 are sand seals into which dip metal sheets fastened to the sides of the transfer truck 5.

27 indicates the sand seals located. along thesides of the furnace, sealing the car pit from the upper portion of the furnace.

The ends of the cars should be made to fit' preventing injurious gases in the lfurnace from coming in contact with the corrodible portions of the furnace and the carspwhile cars are'being introduced into the vestibule or fed into the furnace.

' As an example of the use of my improve furnace, I will describe its application by me to the manufacture of hydrochloric acid and alkali-silico-aluminate. y The charge mixture composed of clay, salt and carbon, in the proportions, say of 35% to 65% clay, 30% to 50%, alkali chlorid and 3% to 10% carbon, is loaded `onto the transfer truck (resting on the car 4) and introduced into .the vestibule. The door between the vestibule and the furnace being. closed, the front or outer door'of the vestibule is raised and the transfer truck quickly introduced over the track 6'. When the truck is fully within the vestibule, the front i vestibule door is closed, completely sealing the vestibule from the outer air. The door 23 is now raised and the car is pushed gradually into thefurnace by the pusher 22, forcing forward the cars already introduced and the charge mixture on which is undergoing` conversion. During the time that the door 23 remains open, that is,during the time the car is being introduced, the curtains, or battles, 2l, lying close about the car and its charge, prevent any noticeable escape of gas from the portion 8 of the furnace intothe vestibule, and the `baffles 14 keep at will. the gases below the cars from escaping into the vestibule. As the charge comes into the furnace it is sub- ]ected tothe combustion gases and to steam and air that is blown into the furnace against the direction of movement of the cars. The chemical reaction of the conversion transforms the charge into alkalisilico-alummate andhydrochloric acid, this latter being drawn off to an acid condensing system by the suction fan 1l. The curtains 2l prevent the escape of the acid over and around the loaded cars.l So long as this acid remains in the state of vapor and above be destroyed, if of iron or other corrodible substances. It is to prevent this that l. have arranged along the sides of the furnace the gas supply 13, tapping off into the spaces'between two successive baffles, and I blow through this an aix-or gas supply, and I so regulate the pressure thereof, say by the valves 17, that there is always a balance between the pressures above and below the cars, or else a slight excess pressure upward from`below vthe cars, causing a slight leak upward, but a downward leak is to be avoided. 'f l I do not herein claim the process of Vmaking hydrochloric acid and alkali-silico-aluminate, as that forms the subject matter of my copending application, Ser. No. 521, 692.

What I claim, is

1. A channel furnace having a combustion chamber through which trucks are adapted to be passed and means for maintaining the spaces above and below the trucks isolated from each other while intro .ducing a fresh truck intol the combustion chamber.

2. .A furnace of the channel type having a vestibule suitably sealed from the furnace proper and the outer air, said vestibulebeing provided with rails for supporting a transfer car, rails on the upper surface of .the transfer car, a'car carried by said rails, in combination with a pusher penetrating the wall of the vestibule and adapted to im'- part to the car on the transfer car a gradual and uniform movement into andthrough the channel furnace.

3. A. furnace of the channel type provided with a track, cars located on said track and dividing the furnace into twov portions, one above and one below the car bodies, means for supplying' gas to, and means for exhausting gas from the upper portion of the furnace, means for dividing the portion of the furnace below-the cars into a series of separatevsections exten ding throughout the length of the furnace, a gas supply connected with each such sections, and means for separately regulating the` gas supply to each section,

vso as to prevent the gases from passing from the upper to the lower portion ofthe f urnace. Y

t. In a furnace of Vtheehannel type, a track, cars running on said track and dividing the furnace into upperv and lower por# tions, a series of curtains at the entrance end of the furnace, and an exhaust fan located near the said entrance end, in combi'- nation with means for preventing gas passlng from above to below the car bodies.

5. A channel furnace provided with a car York and State of New York this 14th day track, cars resting on sind track, a car pit, a of March A. D. 1912. series of movable 'baes dividing the car it ALFRED H COWLES into separate sections, and an adjusta. 1e 5 means of gas supply connected with each Witnesses:

section. FRED WHITE,

.Signed at New York in the conty of New ALBERT SfrE'rsoN.

Copies of this patent may be obtained for liive centseaoh, by addressing the Commissioner o! Patents, Washington, D. 0.

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