US281046A - Furnace for the manufacture of carbon - Google Patents

Description

(U0 Model.) 2 Sheets-Sheet 1'. H. FRASGH. Y FURNACE FOR THE MANUFACTURE OF CARBON. 310,281,046. Patented July 10 1883;

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H. PRASGH.

FURNACE IEOR'THE MANUFACTURE OF CARBON.

No. 281,046. Patented July 10, 1883.

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UNITED STATES PAIENT @rricn.

HERMAN FRASOH, OF CLEVELAND, OHIO.

FURNACE FOR THE MANUFACTURE OF CARBON.

SPECIFICATION forming part of Letters Patent No. 281,046, dated July 10, 1853.

Application filed January 12, 1883. (No model.)

To all; whom it may concern/.-

Be it known that I, HERMAN FRASOH, of Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful 7 Improvements in Furnaces for the Manufacture of Carbon; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains IO to make and use the same.

My invent'on relates to furnaces for the manufacture of carbon for electric-light carbons and other purposes.

In the accompanying drawings, Figure 1 is a view in front elevation. Fig. 2 is a plan view. Fig. 3 is a transverse section, and Fig. i is a vertical longitudinal section.

A represents the ash-pit, and B the fire-box door. The ash-pit communicates with two fines, O C, which extend to the rear end of the furnace and then back and forth, forming return-fines, and having their exit in the escapeilues D1) at the front of the furnace, where theymerge into the stack or chimney E. The hearth of the furnace is constructed of the tilings a, which are placed directly over the dues C 0.

Upon the tilings a is placed a layer of asbestus, b, and upon the latter are placed the 0 tilings c, which are laid to break joints with the lower tilings, a. The arch F is covered with sand (I, and the walls strengthened by the tie-rods e. At the front of the furnace is located the charging-opening G, provided with 5 a door, G. This door is located a suflicicnt distance above the hearth or floor of the fur- I nace to allow of the proper charging of the furnace.

At the sides and end of the furnace are the +0 doors H, which are placed on a level with the hearth or floor for the removal of the carbon. An escape pipe, I, communicates with the upper portion of the"furnace-chamber, and is provided with a stop-cock or valve, 2'. A pipe, 5 J, connects with the pipe I and leads beneath the grate of the fire-box. Pipe J is provided with a stopcock or valve, 9'. The lower end of the chimney or stack is provided with a damper, K.

Having described the construction and relative arrangements of my improved furnace, I

an improvement in will now describe its operation: I take distilled hydrocarbon of high density, obtained by the distillation of petroleum or other hydrocarbon oils, and mix the same withs rfl fifiric'fig -or-nicricacid. After the furnace has been heated, all of the doors being closed, the charging-door is opened, and the compound is charged into the furnace to the proper depth. i 'When the temperature reaches about 300 605 Fahrenheit, the mass being quite liquid, reac- ,tion begins to take place the hydrogen of the hydrocarbon combining with the oxygen of the acid if sulphuric acid is used, or steam and nitrogenous compounds when nitric acid is used. This reaction tends to stiffen the whole mass, so that it becomes quite hard even before the temperature of 500 Fahrenheit is reached. By continuing the operation and gradually increasing the temperature to, say, 1000 Fahrenheit, or more, all of the decomposition products, being volatile, are driven off, leaving acarbon cokeupofi tlfdhearth of tlgniurnace almost chemically ure, quite louse and dry, and easily'remov'ed, which is effected by opening the side doors and inserting a slice-bar beneath the mass, breaking it up into pieces and removing them through the side doors. In charging the furnace the damper K is opened to conduct the cscapiu g flame into the chimney, and thus not interfere with the workmen. The gases generated in the fun nace may be allowed to escape, or be conducted to the ash-pit and burned. The quantity obtained by the process described is a large percentage of the carbon originally employed. The sludge oils and acid compounds which are drawn oif in the ordinary treatment of petroleum distillates may be subjected to the same treatment, in which case the same reaction takes place and the same carbon product obtained, thereby very profitably utilizing what have been heretofore regarded as the waste products of an oil-refinery. The furnace is constructed so that the heat will evenly be 95 distributed beneath the hearth, and the latter is made comparatively thin so that the heat may readily be transmitted to the charge. By means of the two layers of tiling arranged to break joints and the intervening layer or packing of asbestus a perfectly-tight hearth or floor is insured.

I make no claim in this application to the process described, as such subject-matter is de- 2. In a furnace for the manufacture of cal bon, the flooror hearth consisting of the layers of tiling and the intervening packing of asbestus, substantially as set forth.

' 3. Afurnacefor the manufacture of carbon,

having .a hearth or floor constructed of two layers of tiling, arranged to break joints, and an intervening packing of asbestus, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

HERMAN FRASCH.

Witnesses:

F. O. MOGLEARY, GEORGE 000K.

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