US834058A

US834058A - Boiler-furnace.

Info

Publication number: US834058A
Application number: US28545005A
Authority: US
Inventors: Percy Jackson
Original assignee: J S SCHOFIELD S SONS CO
Current assignee: J S SCHOFIELD'S SONS CO; J S SCHOFIELD S SONS CO
Priority date: 1905-11-01
Filing date: 1905-11-01
Publication date: 1906-10-23
Anticipated expiration: 1923-10-23

Description

P.. JACKSON. BOILER PURNACE.

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PATENTBD 00T. z3, 1906.

N0. 834,058. PATENTED'OGT. 23, 1906.

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BOILER FURNAGB.

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APPLICATION' FIVLED NOV. l. 1905.

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UNITED STATES vPATENT oEEIoE.

PEROY JACKSON, OF MACON, GEORGIA, ASSIGNOR TOV J. S. SCHOFIELDS SONS CO.,-OF MACON, GEORGIA.

BOILER-FURNACE.

The object of the invention is to provide a new and improved boiler-furnace capable of using coal, mill refuse, bagasse and the like as a fuel and arranged to insure a complete combustion-of the burning fuel and to utilize the heat to the fullest advantage with a view to economize in fuel and to quickly generate steam without danger of burning the boiler-shell.

vThe invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which `similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the improvement arran ed for burning coal and like fuel. Fig. 2 i's a ongitudinal sectional side elevation of the same. Fig. 3 is a transverse section lof the same on the line 3 3 of Fig. 2. Fig. 4 is a like view ofthe same, on the line 4 4 of Fig. 2. Fig.` 5 is a longitudinal sectional side elevation of the improvement as arranged for burning mill-refuse, bagasse, and like fuel. Fig. 6 is a cross-section of the same on the line 6 6 of Fig. 5, and Fig. 7 is a similar view of the same on the line 7 7 of Fig. 5.

` In,the improved boiler-furnace illustrated in Figs. 1. 2, 3, and 4 the heat-generator A is connected at its rear end by a'connectingchamber B with the rear end of a steam-generatorl C, provided on its top with a steamdome D, and `at its front end with a smokestack E. rIhe steam-generator C is hung on eyebolts F, connected with a suitably-constructed frame G for-supporting the steamgenerator O wholly independent of the heatgenerator A and directly above the same to eoonomize in space, as will be readily understood by reference to the drawings.

The heat-generator A,the connecting-charnv ber B, and the steam-generator O are provided wth envelops of a non-heat-penetrating construction, so that the heat is confined Specification of Letters Patent.

Application led November 1, 1905. Serial N o. 285,450.

Patented Oct. 23,v 1906.

kwithin the saiddevices without danger of 'loss of heat by leakage or radiation, it being understood that the heat generated in the heatgenerator A passes from the rear end thereof into the connecting-chamber B, in which the heat rises to iinallypass through the iiues O of the steam-generator C into'the smokestack E.

The heat-generatorl A is lprovided with a cylindrical metallic casing H, having an interior lining I, the upper portion of which is made of fire-brick, while the lower portion is made of ordinary brick, asplainly indicated in Figs. 3 and 4. A acking J, of asbestos, cement, or like non-fieat-conducting 'material, is placed between the casing II and the upper or fire-brick portion ofthe lining I to prevent all escape of heat from the interior of the heat-generator A through possible spaces or cracks that may form between ad-I jacent iire-clay bricks of the lining. As shown, the bricks for the lining I are disposed radially, so as to form an exceedingly-strong and durable envelop for the heat-generator A. In the front portion of the heat-generator A is arranged a fire-box K, provided with a grate K and an ash-pit K2, having a bottom K3 made of concrete or like material, access to the re-boX Kvbeing had by the usual fire-door K4, through which the coal or other fuel is introduced. The bridge-'wall L for the rear end of the fire-box K is provided in its lower portion with openings L', connecting the rear end of the ash-pit K2 with the front end of an air-duct N, built in the rear portion of the heat generator A and extending through the connecting-chamber B to the outside or outer end ofthe said duct N, being controlled by a door N to admit more or less air to the said duct. When the boiler-furnace` is in operation, atmospheric air can pass through the duct N and openings L into the ash-pit K2 to then rise through the grate K v made somewhat less in diameter than the for-` IOO ward portion, which contains the nre-box K, it being understood, however, that the said reduced rear portion is sufliciently large to readily accommodate the heat and gases passing from the fire-box K, over the bridgewall L, through the reduced portion and over 'the roof of the duct N into the connectingchamber B. Now the gases in their passage through the reduced portion of the heat-generator A heat the roof of the duct N, so that the air passing through the said duct is highly heatedbefore it reaches the openings L and the ash-pit K2, and this highly-heated air when passingifinto the fuel greatly facilitates the combustion thereof.

The connecting-chamber B has its wall or envelop of a non-heat-penetrating construction, and for this purpose a metallic shell O is provided, having an interior lining O, the inner face of which is preferably of iire-brick, as plainly indicated in Fig. 2. A manhole O2 is arranged in the rear wall of the connecting- 'chamber B to permit convenient access to the interior of the connecting-chamber B and the heat-generator A.

The steam-generator C is provided with a metallic shell C2, containing the usual boilerheads, in which the ends of the iiues C are fastened in the usual manner, and the said shell C2 is provided with an envelop of anonheat-penetrating construction, preferably in the form of a covering P, of asbestos or other non-heat-conducting material. The feedwater pipe Q connects with the interior of the shell C2 in the usual manner.

By the construction shown and described it is evident that the heat generated in the heat-generator A is not liable to radiate or leak through the envelop, but passes into the connecting-chamber B, also arranged to prevent loss of heat by leakage or radiation, the heat finally passing into the rear ends of the flues C and through the same to heat the water contained within the shell C2 and surrounding the iiues C. The flues C are comparatively small in diameter and are placed eX- ceedingly close together to provide a very large heating-surface to insure a rapid generation of steam, it being expressly understood that the shell C2 of the heat-generator Ais not subjected directly to the heat generated in the heat-generator A, owing to the nonheat-penetrating envelops of both the heatgenerator A and the steam generator C. Thus a long life is insured to the shell C2 and danger from explosion is reduced to a minimum, as the entering of cold feed-water is not liable to strike an overheated part of the shell C2, as the latter is not subjected directly to the heat generated in the heat-generator A.

For burning mill refuse, bagasse, and like fuel the air-duct N is preferably dispensed with, (see Figs. 5, 6, and 7,) and the heatgenerator is preferably made double, as indicated by A and A2, and in this case the shell H for the heat-generator is elongated in cross-section, as plainly shown in Fig. 6, and the lining I is arranged to form a central longitudinal partition to divide the heat-generator into two parts, each having its own 'lirebox K5 similar, however, to the construction above shown and described, so that further detailed description of the same is not deemed necessary, it being, however, understood that the rear end of the double heatgenerator A discharges the heat and gases into the single connecting-chamber B similar to the chamber B and delivering the heat and gases through the smoke-lines in the single steam-generator C3, provided with the steam-dome D and the smoke-stack E. The steam-generator C5 is hung by eyebolts F from a frame G similar to the frame' G above described in reference to Figs. l, 2, 3, and 4, so that further description of the same is not deemed necessary. The steam-generator C5 is in its detail construction like the steamgenerator C and is also provided with a pipe Q for supplying feed-water to the said steamgenerator.

As shown in Figs. 5 and 6, the rear portion of each heat-generator A or A2 is reduced relative to the front portion thereof containing the {ire-box K5.

For burning sawmill refuse, bagasse, and the like it is desirable to make the rear portion, which forms the combustion-chamber of considerable length, to facilitate the combustion of the fuel during its passage from the fire-box K5 into the connecting-chamber B.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A boiler-furnace provided with a heatgenerator, comprising a cylindrical envelop closed at the front end and open at the rear end, the envelop having a lining of a nonheat-penetrating material, a fire-box in the front end of the envelop, a bridge-wall built within the said envelop, and an air-duct eX- tending in through the rear end of the envelop to the said bridge-Wall to connect with openings therein leading to the ash-pit of the fire-box.

2. A boiler-furnace provided with a heatgenerator, comprising a cylindrical envelop closed at the front end and open at the rear end, the envelop having a lining of a nonheat-penetrating material, a fire-box in the front end of the envelop, a bridge-wall built within' the said envelop, and an air-duct extending in through the rear end of the envelop to the said bridge-wall to connect with openings therein leading to the ash-pit of the fire-box, the said air-duct having its roof arched and its ends abutting on the said lining.

3. A boiler-furnace, comprising a heatgenerator having an envelop of non-heat- IIO conducting .materiaL a steam -generator wholly independent of the said heat-generator and having an envelop of a non-heat-conducting material, the rear portion of the said heat-generator being reduced in diameter, a connecting-chamber for connecting the rear ends of the said generators with each other, the said connecting-chamber having its wall of a non-heat-conducting material, land an air-duct having an arched roof and extending through the reduced portion of theheat-generator and the connecting-chamber and opening into the ash-pit of the heat-generator.

4. A boiler-furnace provided with a heat generator having a tubular envelop of a nonheat-penetrating construction, the front portion of the envelop containing the fire-box and the rear portion being reduced in diameter and forming a combustion-chamber, an apertured bridge-wall between the iire-box and V- combustion chamber, a connectingchamber into which opens the rear end of the said heat-generator, an air-duct having an arched roof and extending from the bridgewall through the combustion and connecting chambers and communicating with thel ashpit of the heat-generator through the apertures of the bridge-wall, and a steam-generator whollyr independent of the said heat-generator and havin one end opening into the said connectin -c amber.

5. A boilerrnace, comprising a steamgenerator, a heat-generator below the steamgenerator and having a fire-box vin its front portion and a combustion-chamber in its rear portion and provided with an apertured bridge-wall, the combustion-chamber being reduced in diameter, a chamber at the rear of the steam and heat generators and connect'- ing the same,` and an air-conduit having an arched Wall and extending from the bridgewall through the connecting-chamber` and provided with a closure at its outer end.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.` Y PERCY JACKSON. Witnesses:

B. W. HoL'rzeLow, H. C. LAMAR.