US665919A - Fume-condensing apparatus for fuel-accumulator for smelting-furnaces. - Google Patents

Description

Patented 1an. |15, I90I.

c. c. Lonen. FUMEllMllEQSlMn APPARATUS AND FUEL ACCUIULATOR FOR SMELTING FURNACES.

(Application. led July 10, 1899.)

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No. 665,9l9.

Patehted 1an. l5. c. c. Loom. IME CONDENSING APPARATUS ANDV FUEL ACCUMULATOR FUR SMELTIVNG FURNACES (Application filed July 10, 1899.)

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(No Modem No. 665,919.v Patented 1an. l5, 190|.

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FME GDNDENSING APPARATUS AND FUEL ACCUMULATUR FUR SMELTING FURN'ACES.

` (Applicmn'mea .my 1o 1899.)

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770.gif y/rs UNITED STATES PATENT OFFICE.

CLAUDE O. LODER, OF DENVER, COLORADO.

FUME-CONDENSING APPARATUS AND FUEL-ACCUMULATOR FOR SMELTlNG-FURNACES.

SPECIFICATION forming part of Letters Patent No. 665,919, dated January 15, 1901.

Application iled July 10,1899.` Serial No. 723,303. (No model.) i

T0 a/ZZ whom it muy concern.-

Beit known that I, CLAUDE C. LODER, a citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Fume-Oondensing Apparatus and Fuel-Accumulators for Smelting- Furnaces, of which the following is a specification.

It is Well known to those skilled in the art to which my invention appertains that the poisonous and obnoxious gases and fumes which are permitted to escape in the process of reducing metallic `ores by the usual methods are a source of great annoyance, being largely detrimental to health and to the growth of vegetation in` the vicinity of such smelting plants. It is also well known that in the treatment of metallic ores by the ordinary construction of smelting-furnaces the escaping fumes and gases, in addition to workingvtheir deleterious results, carry with them a fixed value of from five to ten per cent. of the product handled.

Itis the object of my invention to overcome the detrimental effects above referred to, to obviate the losses stated, and to provide a cornparatively simple, durable, and compact construction of apparatus affording economy in cost, space, and subsequent maintenance, dispensing with the large and expensive smokestacks and condensing-chambers and the arrangement of precipitating-tanks sometimes employed, and to produce a saving by accomplishing a higher degree of extraction, and thereby being able to treat low-grade ores successfully; and to these ends myinvention consists in a condensing apparatus embodying the general features of construction and arrangement of parts having the mode of operation substantially as hereinafter more particularly set forth.

In the accompanying drawings I have illus-` trated a preferred embodiment of my invention, in Which- Figures 1 and 2 are respectively a side elevation and a plan view of an ordinary vertical shaft and furnace. Fig. 3 is a longitudinal section of my apparatus, taken on the line x Fig. 4. Fig. 4 is a horizontal section of the same on the line y y, Fig. 3, showing the cooling-receptacle in full lines. Fig. '5 is an enlarged detail elevation of the cooling-receptacle, part being in vertical section, taken on the line c c, Fig. 6. Fig. 6 is a horizontal sectional plan on the line w w, Fig. 5. Fig. 7 is an end elevation and half-sectional View on the line s s, Fig. 6. Fig. 8 is a side elevation and part-sectional view of a hyd romechanical device, accumulator, and draft-blower, with condensing and precipitating tanks. Fig. 9 is a plan view and part-horizontal section of the same; and Fig. l0 is an end View, in part section, of the same.

It Will be understood that my improved cooling and condensing apparatus can be attached 'to and used in conjunction with a reverberatory furnace or other similar structure, although in the present instance I have shown it in connection with a vertical-shaft furnace X, the construction of which is well understood by those skilled in the art and need not be specifically described. Connected with such furnace so as to receive the products of combustion therefrom is a blast or draft chamber A, constructed of brick or similar material,and interposed within its draftchannel is a cooling-receptacle B. This receptacle may be constructed of cast-iron, copper, steel, orother similar material and comprises a series of hollow rectangular receptacles b', disposed in a vertical transverse plane within the walls of the draft-chamber A, there l being any desired number and the receptacles being arranged a sufficient distance apart to form between their vertical outer sides the draft or air passages a. These transverse receptacles are connected together in any suitable way, and, as shown, each pair are connected by upper and lower longitudinally-disposed circulating-liues b2. The receptacle b most remote from the furnace is provided with an inlet pipe or flue c, While the receptacle b',

adjoining the furnace, is fitted with a similar outlet-pipe D. These parts, including a series of any number of transverse receptacles and their connecting-fines, form the cooling-receptacle B and are designed to afford a maximum area of exposed surface within the draft-chamber. This cooling-receptacle can be constructed in sections and assembled in any convenient way or may be otherwise made and is suitably set Within the draft-chamber and is supported upon a series of alternately- IOO disposed upper and lower transverse bulkheads a2 a2, built against the alternate upper and lower edges of the transverse receptacles b', so as to form a continuous channel through the cooling-receptacle. Into the Hoor-wall adjoining the pitor lowercurve of the passages a are placed a series of openings having suitable closures E.

Connected in anysuitable way and preferably built into the end of the draft-chamber A is a metallic hopper or tank F, of cast or sheet iron or similar material, which is fitted with a top or cover G of the same material and within which is mounted upon a transverse shaft a revoluble vane-wheel H, de-

signed to be rotated in the direction of the arrow, Fig-3, by power applied to a beltwheel I. This tank is made water-tight and is filled with water or some suitable solution to a level about that of the shaft and is supplied with water or solution through the inlet-pipe f' and is drained through an outletpipe f2. The vane-wheel H is formed with circular end disks h', between which are a number of transverse vanes, blades, or paddles h2, which form around the wheel a number of separated triangular open apertures h3, extending across the top of the tank F. Ad-

joining the air-passage a there is a transverse partition f3, and this, with the central arched portion g of the cover G, is fitted accurately but freely to the peripheries of the wheel-disks h and the outer edges of the vanes h2.

It will be seen that the vanes h2 in traveling through the space above the water or so-v lution will move in the direction it is desired the fumes and gases should travel, and thus create Aa suction from the furnace through the draft-chamber A. Also the water or solution, being nearly on a level with the bottom of the exit-opening from the chamber F, will prevent the formation of a vacuum below such exit and the fumes and gases will pass freely out of the chamber. It will also be observed that the passage for the fumes and gases above the water or solution is unobstructed except by the vanes, and such fumes and gases will therefore when the vanes are moving pass freely through' the passage above the water or solution without being mixed therewith.

While the apparatus thus fardescribed can` be used alone, I prefer to use under certain conditions in connection therewith an auxiliary condensing or precipitating tank J. This is hooked to or formed upon the outer end of the tank F and is supplied with water or some suitable solution from an inlet-pipej' and drained by an outlet-pipe j?. In the construction illustrated this tank has an open top, into which is projected the open end of an angle-spout K, the opposite i'anged end of which registers with and is bolted to the open end of the cover G. The open end of i the spoutis carried beneath the surface of the liquid in the tank J.

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through the cooling-receptacle B, entering the inlet c and passing in the direction of the arrows through the outlet D, the object being to reduce the initial high'temperatu re of the fumes and gases arising from the combustion of the ores within the furnace while being carried through the circuitous passages a of the draf t-chamber. The passage of these .fumes and gases is insured by the forced draft or suction created by thev semisubmerged vane-wheel H. The fumes or gases upon leaving the furnace at a very high temperature carry with them in very minute particles a percentage of the products of combustion, part of which coming into contact with the cooling-receptacleB are precipitated into the Vpits adjoining the dampers or openings E, and a further precipitation of finer particles of the products of combustion is deposited in the tank F, to be drawn off through the outlet f2 into a suitable settler or other receptacle. A further condensation of the fumes and precipitation of the product is effected by the use of the auxiliary tank J. B'y this arrangement it will be seen that I effect a forced draft or suction-without the necessity of a high chimney or like construc- I also trap a large percentage of the poisonous fumes and precipitate the unconsumed particles of the product, which ordinarily escape through the forced draft of the smoke-stack and are lost. The unconsumed products deposited in the several receptacles are collected from time to time during the process of reduction and by any suitable treatment, as witha suitable plastic mass, as

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lime, are molded into cubes or bricks,which may be dried in a kiln, which may be heated with air from the outlet-pipe D, and these products can again be fed to the furnace for Aeffecting a more thoroughcombustion of the same. Further, the tank .I may under certain conditions be provided with aclosed top and the fumes arising from it can be carried Vinto a suitable receptacle to be utilized for other purposes-as, for instance, producing understood by those skilled in the art and without limiting myself vto the precise details shown and described.

What I claim is- 1. In a condensing apparatus, the combinar tion with a draft-chamber, of a cooling device comprising a series of rectangular receptacles 2 disposed in vertical transverse planes Within the walls of the draft-chamber and connected in pairs alternately at their upper and lower ends by ues, and bulkheads between the up- Q per and lower walls of the draft-chamber and upper and lower ends respectively of alternate receptacles to provide a circuitous passage through the draft-chamber, substantially as described.

2. In a condensing apparatus, the combination with a draft-chamber, of a cooling device comprising a series of rectangular receptacles disposed in vertical transverse planes within the walls of the draft-chamber and connected in pairs alternately at their upper and lower ends by fines, bulkheads between the upper and lower walls of the draft-chamber and upper and lower ends respectively of alternate receptacles to provide a circuitous passage through the draft-chamber, and openings provided with closures between the lower bulkheads, substantially as described.

3. In a fume-arrester, the combination with a fu rnace,of a draft-chamber connect-ed therewith, a cooling device mounted in the draftchamber, a tank having inlet and outlet passages directly connecting with its upper porton,the formercommunicating with thedraftchamber, said tank containing water or a solution to a level just below the said passages, a vane-wheel mounted in the tank and closely fitting the same, and means for rotating the vane-wheel in a direction to move the vanes through the space above the Water or solution toward the exit-passage, whereby a suction is created from the furnace and the fumes and gases pass through the tank above the Water or solution, substantially as described.

4. In a fu Ine-arrester, the combination with a furnace,of a draft-chamber connected therewith, a cooling device mounted in the draftchamber, a tank having inlet and outlet passages directly connecting With its upper portion,the formercommunicating with thedraftchamber, said tank containing Water or a solution to a level just below the said passages, a vane-wheel mounted in the tank and closely fitting the same, means for rotating the vane- Wheel in a direction to move the vanes through the space above the Water or solution toward the exit-passage, and a condensing-tank with which the exit-passage communicates, substantially as described.

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

CLAUDE C. LODER.

Witnesses:

REULA G. COOK, J oHN T. ADAMS.

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