US285522A - Regenerative furnace - Google Patents

Description

(No Model.)

REGBNERATIVE FURNAGE.

Patented Sepg'. 25, 1883.

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(No Model.) 4 sheets-sheet 2.

W. SWINDELL.

REGBNERATIVE PURNAGE.

Patented Sept. 25, 1883.

N4 PETERS. Phulvulhogmplur. Whington. B.C.

4 Sheets-Sheet 3.

(No Model.)

W. SWINDELL.

REGENBRATIVE PURNAGB.

Patented Sept. 25, 1883.

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(No Model.) 4 Sheets-Sheet 4. W. SWINDELL.

RBGBNBRATWB PURNAGB. No. 285,522. Patented Sept. 25, 18

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UNITED STATES/A PATENT OFFICE..y

VILLIAM SVINDELIJ, OF PITTSBURG, PENNSYLVANIA.

REGNERATIVE FURNAACE.

SPECIFICATION forming part of Letters :Patent No. 285,522, dated September 25, 1883.

Application filed August S, 1883. (No model.)

To all whom, t may concern..-

Be it known that I, WILLIAM SWINDELL, of Pittsburg, in the county of Allegheny and `State of Pennsylvania, have invented a new and useful Improvement in Regenerator-Furnaces, and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part ofvthis specification, in

2. Fig. 2 is a horizontal section on the liner .fr of Fig. l. Fig. 3 is a vertical longitudinal section on the line y y of Fig. 2. Fig. 4 is a vertical crossseetionon the line z z of Fig. l.

Fig. 5 is a'vertical cross-section on the-line y y, Fig. l.

Like letters of reference indicate like parts in each. l y

The bed of the furnace is shown at a. Underneath the furnace I place a portion of the regenerators, b being the gasregenerators and c the air-regenerators.

Instead of making the vertical fines which lead from the regeneratorsto the bed open, as heretofore7 I fill them with checker-work, so that' they constitute practically a portion of the regenerators. This is shown at bIl and at c2. Thus I construct the furnace with regenerators which are partly horizontal and partly vertical, and by utilizing the iiuespace as a regenerator-space I am enabled to reduce the depth of the regenerators under the furnace, and in this way I bring the regenerators nearly to the surface, and save not only vin the cost of construction but also in the cost of maintenance and repairs, the regenerators of my improved furnace being much more accessible andeasilyrepaired than those commonly in use.

I prefer to construct the regenerators b and c of checker-brick d, which are conical, conoidal, or pointed at both ends, the points being arranged in the direction of the run of the gases; but they maybe constructed of othershaped brick suitable for the purpose. y

The vertical flue's b2 and c2 are filled with checker-brick el', having a wedge-shaped or deflecting upper surface, which are supported upon tiles d2, ofsimilar construction, so that throughout the entire run of the Ylues no bearing is afforded for the lodglnent of dust, cinders, and dirt, which are carried over from the bed by the stack-draft.

The checker-bricks d are built up in cross Y intense heat to which they are exposed, so that in ease it becomes necessary to take down the regenerators the bricks cannot be taken apart face of the points of contact to a minimum.

The result of this construction is that the bricks can be taken apart without breaking them, the area of the points of contact being so small that they can easily be detached from each other.

At the lower end of each vertical regenerator is au open space, e, which is provided with an opening, c', extending through the walls and closed by suitable doors, e2. The purpose of the space c is to catch the dirt and cinders which come down throughthe vertical regenerators, so that the same may be drawn out through the hole c without stopping the operation of the furnace.

I construct the ports f, which lead the gas into the bed of the furnace from the vertical regenerators b2, of an inverted V form, and the airports g, leading from the vertical regenerators c2, of V form, and arrange them as shown in Fig. 5 alternately, so Athat the wide portion ofthe air-ports shall be over the wide portion of the gas-ports. The division-walls between the flues f and g are formed, preferably,of single slabs orl tile, h, and the upper sides of the airports g are formed of straight slabs h with beveled edges, which are dropped into the mouth of the V. This construction and ar- IOO rangement of the fines causes a much more in f timate and better admixture of the air and gas at the entrance of the furnace than the plan heretofore commonly practiced, in which. the entire body of air was thrown in over the top of the entire body of gas. The construction described is much more economical and much more easily renewed than the old form, where the flue-walls were built up of separate firebrick. In the present case, if any of the ports are worn or burned out, all that is necessary is to take off the roof of that portion ofthe struct ure, remove the injured slabs, and drop new ones into place. No special fitting is necessary, as the slabs are duplicates in form. /Vhen the ports as formerly constructed burned out, it required the bearing out and rebuilding of the whole side of the furnace, and also the removal of a portion of the crown, which operation is tedious and expensive. Much labor and expense are saved by this portion of my improved construction.

I construct my reversing-valvefil of two cast or wrought iron plates, Z', bolted together7 and having dovetailed recesses formed by projecting flanges upon each side of the saine. These recesses are filled so as to line the external surfaces of the valve with a correspondingly-shaped brick or tile, Zi. The valve, being mounted on the shaft 7c in the valve-chamber, with its edges projecting under a reversely-beveled shoulder, Z, formed on the sides of the chamber Z, is caused to seat downwardly against the upper surfaces of the walls m of the smoke-flue m and upwardly against the lower face of the top Z2 of the valve-chamber Z. Thus it is caused to seat in the same direction as the pressure of the passing current of gas or air, and hence is not nearly so liable to leak. In addition to this, the construction of the valve is such as to guard against warping. In case of the wearing out of the tile covering, the same may be renewed by simply inserting new pieces. Thus I effect economy in construction and use, and obtain greater precision in the operation of the furnace.

The iiues n o, leading from the gas and air regenerators and valve-chambers Z Z to the stack-fiue p, are controlled by separate valves, u o', so as to regulate the temperature of the air and gas regenerators by governing the passage of the waste products of combustion through them. f

The reversing-valve maybe formed by plac ing the tile Z in a mold and casting the metal part of the valve around and between them. One great advantage of this valve over the old forni is that the metal parts are protected from injurious action of the heat. rIhe metal flanges ZL extend along the edges, which are not greatly exposed, while the end which is exposed at all times to the intense heat is covered with the refractory material, and is not liable to be burned off, as is the case with the prior valve mentioned. Vhile the edges of the valve are not greatly exposed to the heat when the valve is used, yet when the valve becomes warped the iniiowing gas from the producer is liable to leak in around the joints, and, meeting the outgoing heated produsts of combustion, burn at lthe edges and produce an intense heat, which tends to melt off the edges of the valve. To prevent this from occurring I have formed the side of the valve chamber with the vreversely inclined shoulders Z, which form a seat for the edge of the valve and make a tight joint, which prevents the leakage of the gas at that point, and consequently all danger of the burning away of the edges of the valve. The same danger exists, but to a lesser degree, with the air-valves, and I have therefore constructed the air-valve chambers also with the reversely-inclined shoulders. In order to fully protect the lower edges of the valve I form similar reversely-inclined shoulders, Z3, below the valve, so that theY lower edges of' the valve may seat thereon, said shoulders being beveled, so as to afford no lodgment for dirt.

Vhat I claim as my invention, and desire to secure by Letters Patent, is-

l. In a regenerator-furnace, the combination, with a horizontal regenerator-chamber provided with checker-work, of a vertical regenerator-flue leading from the regenerator to the hearth, said flue provided with checker-work,whereby the flue-space is utilized and the depth of the regenerator reduced, substantially as and for the purpose specified.

2. In a regenerator-furnace, the flues con necting the regenerator with the working chamber constructed of a series of inclined or converging walls which divide the passages into a series of .contiguous alternating air and gas flues of V-section, substantially as and for the purpose specified. I

3. In a regenerator-furnace, a series of inclined tiles reversely arranged to divide the air and gas inlets into V-shaped ports, substantially as and for the purpose specified.

4. In a regenerator-furnace, the combina- Ition of the converging tiles h 7L and top tile, 7i',

arranged to form V-shaped air-ports, substantially as and for the purpose specied.

5. A regenerator or stove having its checker-work constructed of bricks having deflect ing tops and flat bottoms, the flat bottoms of each course resting on the sharp top edges of the bricks of the subjacent course, substantially as and for the purposesdescribed.

In testimony whereof I have hereunto set my hand this 2d day of August, A. D. 1883.

VILLIAM SVVINDELL.

lVitnesses:

THoMAs XV. BAKEWELL, FRANK WV. SMITH.

IOO

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