US722321A - Smokeless steam-generator. - Google Patents

Description

PATENTED MAR. 10, 1903.

0. D. 0Rv1s.

SMOKELBSS STEAM GENERATOR.

APPLICATION FILED SEPT. 12, 1902.

2 SHEETS-SHEET 1.

NO MODEL.

Fig. 1

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No. 722,321. PATENTED MAR. 10, 1903.

0. D. ORVIS. I SMOKELESS STEAM GENERATOR.

APPLICATION FILED SEPT. 12, 1902.

2 SHEETS-SHEET 2.

NO MODEL.

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OREL D. ORVIS, OF JAMAICA, NEW YORK.

SMOKELESS STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 722,321, dated March 10, 1903.

Application filed September 12, 1902. Serial No. 128,172. iNo model.)

To to whom, it mrtz; concern:

Be it known that I, OREL D. ORVIS, a citizen of the United States, residing at Jamaica, borough of Queens, city of New York, in the county of Queens and State of New York,have invented certain new and useful Improvements in Smokeless Steam- Generators, of'

which the following is a specification, reference being bad therein to the accompanying drawings.

My invention relates to improvements in steam-generators, and more specifically in that class of steam-generators wherein the air or steam which is admitted to the firechambers is heated prior to coming in contact with the burning fuel.

The invention purposes to perfect the combustion of fuel and increase the generation of steam by establishing a thorough distribution of hot air or superheated steam or their mixture in the fire-chamber.

One of the characteristic features of the invention is an arrangement in the furnace of heating-cylinders in such a manner that air or steam, or both, when admitted thereinto shall become highly heated before entering into combustion.

Another feature of the invention comprises an arrangement of water-tubes providing passage for a free circulation of water from the rear of the boiler around the heating-cylinders.

In a practical operation of the invention and as shown in the accompanying drawings, to which reference will be made hereinafter, two heatingcylinders are preferably employed. These cylinders, together with circulating tubes, extend longitudinally beneath the boiler in proximity thereto and within the combustion or flame chamber of the furnace.

Referring to the accompanying drawings, Figure 1 represents a longitudinal section of a steam-generator embodying the invention. The section is taken on the line was of Fig. 2, which is a front view of the steam-generator with the front wall removed. Fig. 3 is a back View with the rear wall removed.

The letter A designates a fire-tube boiler constructed and set in the usual manner.

B B represent the side walls, 0 the front wall, and D the rear wall, of the furnace.

F is a bridge-wall forming the back of the fire-chamber G, and H is an opening in the top of the bridge-wall F, over which the flame and'gases make their escapefrom beneath the boiler.

I I are heating-cylinders. These cylinders are made of fire-clay or other highly-refractory heat-storing material, are provided with a double series of port-holes or openings J J and K K, and are closed at the rear end.

L L are partitions or walls of fire-brick or other suitable material extending vertically from the tops of the heating-chambers I I to the lower portion of the shell of the boiler A and longitudinally along the entire length of the heating-cylinders. The cylinders and their partitions extend from the inside of the front wall 0 of the furnace to the back of the bridge-wall F and are separated by an intermediate flame-space.

The circulating system starts from the rear of the boiler near the bottom thereof and is fed through the main tube 0, projecting therefrom. This tube feeds the branch tubes 0 O, the lower ends of which are joined to the rear ends of the tubes M 'M, extending along the inner sides of the heating-cylinders I I. The front ends of the tubes M M are joined by connecting-tubes P P, which are set in the front Wall 0 of the furnace. The outer ends of the connecting-tubes P P are joined to the front ends of the tubes N N, extending along the outer sides of the heating-cylinders, and the rear ends of the tubes N N are joined to the lower ends of the vertical return-tubes R R, which enter the boiler atapoint just above the water-line.

U U are blow-off pipes connected to the rear ends of the tubes N N of the circulating system and are supported upon and extend beyond the rear furnace-wall D.

T T are supply-pipes entering the chambers V V of the heating-cylinders I I for conveying air or superheated steam or their mixture to the openings J J and K K.

S represents the grate-bars.

By referring now to Figs. 1 and 2 it will be observed that the openings K K of the heating-cylinders I I are obliquely disposed and will discharge part of the contents of the chambers V V below the inner circulatingtubes M M into the incandescent fuel on the grate-bars S, while the openings J J simultaneously and in like manner discharge into the flame-space above. With this arrangement any combustible gases which have not been ignited at the lower discharge from the openings K K will be ignited at the upper discharge from the openings J J before escaping over the bridge-Wall F. It will also be seen that the upper section F of the bridgewall F is built upwardly and outwardly against the lower sides of the boiler A and furnace-walls B B and inwardly against the heating-cylinders I I and their partitions L L,

thereby preventing the escape of flame or gases at either side of the furnace. The chilling effect upon the flame and combustible gases of the burning fuel caused by their contact with the lower shell of the boiler and the consequent imperfect combustion is obviated by the highly-refractory heat-storing cylinders, which present an additional surface of a sufficiently high temperature to effect a perfect combustion. I have also found air and saturated steam admitted to furnaces below the burning temperature; but with the arrangement of heating-cylinders herein described the steam is highly superheated and the air is brought to a very high temperature before entering the flame-chamber of the furnace.

The invention is not confined to use in con nection with a steam generator of the particular construction shownand described,and the improvements may be variously modified Without a substantial departure from the real invention.

Having thus described my invention, what I claim is 1. In a furnace the combination of a heating-cylinder of fire-clay or other highly-refractory, heat-storing material having a double row of port-holes on one side and a watercirculating tube at each side of said cylinder, said port-holes disposed to discharge simultaneously above and below one of said watercirculating tubes substantially as described.

2. In the furnace of a steam-generator, the combination of a heating-cylinder having a double row of port-holes on one side, a watercirculating tube at each side of said cylinder, said port-holes disposed to discharge at the same time above and below one of said water-circulating tubes and a partition between said heating-cylinder and the boiler substantially as described.

3. In a furnace the combination of two or more heating-cylinders of fire-clay or other highly-refractory, heat-storin g material, each cylinder having a double row of port-holes through the inner side, a water-circulating tube at the inner side and a water-circulating tube at the outer side of each of said heating-cylinders, the port-holes of one cylinder opposite the port-holes of the other cylinder and said port-holes of each cylinder disposed to discharge at the same time above and below an inner water-circulating tube substantially as described.

4. In the furnace of a steam-generator, the combination of two or more heating-cylinders, each cylinder having a double row of port-holes through the inner side, a watercirculating tube at the inner side and a water-circulating tube at the outer side of each of said heating-cylinders, the port-holes of one cylinder opposite the port-holes of the other cylinder, said port-holes of each cylinder disposed to discharge simultaneously above and below an inner water-circulating tube, a partition between each of said heating-cylinders and the boiler, a bridge-wall dividing the fire-chamber from the back of the furnace and an upper section to said bridge-wall extending inwardly from the side walls of the furnace to the boiler and to said partitions and heating cylinders substantially as described.

5. In a steam-generator, a furnace containing two or more multiported heating-cylinders, a bridge-wall dividing the fire-chamber from the back of the furnace and an upper section to said bridge-wall, partitions extending between said cylinders and the boiler and two or more pairs of water-circulating tubes extending longitudinally beneath the boiler, the front end of each tube being joined by a connecting-tube set in the front wall of the furnace substantially as described.

6. In a steam-generator, a furnace containing two or more multiported heating-cylinders, a bridge-wall and an upper section on said bridge wall, partitions extending between said cylinders and the boiler and a system of water-circulating and blow-off tubes supported by the front and rear Walls of the furnace substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

OREL D. ORVIS.

WVitnesses:

FRANK J. GRIFFIN, JAMES F. LILLY.

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