US486310A

US486310A - Furnace plant

Info

Publication number: US486310A
Authority: US
Publication date: 1892-11-15
Anticipated expiration: 1909-11-15

Description

(No' Model.) ;sheensf'sheenm 1J. E. WELCH.

' PURNACBPLANT.

A4No. 486,310. intent-ed Nov'. 15,1892; l

' A fron/vers UNrrn 'rares JAMES H. WELCH, OF PITTSBURG, PENNSYLVANIA.

FU RNACE PLANT.

SPECIFICATION forming part of Letters Patent No. 486,310, dated November 15, 189.2.

i Application led January 14, 1892. Serial No. 418,092. (No model.)

To all whom t may concern:

- Be it known that I, JAMES I-I. WELCH, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and Improved Furnace Plant, of which the followingisa full, clear, and exact description.

The invention relates to puddling and other furnaces heated by gas, but not using the regenerative system.

The object of the invention is to provide a new and improved furnace plant in which the waste heat of each individual furnace is utilized for the purpose of heating the air necessary for combustion of the gases, effecting a great saving in the use of the-gas and at the same time consuming all smokeand doing away with the necessity of building a stack for each individual furnace.

The invention consists of a conduit connected with asingle chimney and formed with a horizontal partition dividing the flue into two flues, located one above the other, the lower one conducting the waste gases from the furnace to the chimney and the other affording a supply of fresh-heated air for the several furnaces.

The invention also consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forminga part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of the improvement. Fig. 2 is an enlarged sectional side elevation of one of the furnaces on the line 2 2 of Fig.

1. Fig. 3 is a sectional plan view of part of the same on the line 3 3 of Fig. 2. Fig. 4. is a transverse section of the same on the line 4 4. of Fig. 2. Fig. 5 is a similar view of the same on the line 5 5 of Fig. 2, and Fig. 6 is an 'enlarged transverse section of the main conbranch ilue D, extending upward and adapted to be connected by a valve E with a gasflue F, forming part of the individual furnace G. From each gas-flue F extend upward at one end of the furnace G one or more iues F', opening at their upper ends upon the hearth H over the wall H', as is plainly shown in'Fig. 2. The hearth H is of any approved construction, provided with the usual inletopenings H2 and also formed opposite the wall H with a Wall H3, over which passes the waste gas to be led from the hearth I-I. Alongside the iues F' are arranged the flues I', separated from the said flues F' by suitable walls, the said lines I opening into the hearth I-I at the wall H', so as to readily mix with the incoming gases to permit the latter to burn inA the hearth H, complete combustion being 0btained by the incoming air through the flues I. The lower ends of the latter connect with a duct I, extending under the hearth H and containing outside the latter a valve J for regulating the amount of air passing to the hearth to be burned in conjunction with the gases passing up the flues F. The outer end of each duct I leads into a flue K, forming part of a main conduit L, built with an arch L', dividing the conduit into the said due K and into a second flue N, extending below the flue K. From the flue N leads a branch duct O to each individual furnace, the end of the said duct being connected by a channel O with the hearth H at the wall H3, so that the waste gas can pass from the hearth over the said Wall H3 into the channel O'andinto the duct O, to pass iinallyinto the flue N of the main conduit L.

It will be seen by reference to Figs. 2 and 5 that the duct O extends under part of the duct I, and the latter also passes through the channel O', so that the waste gases from the hearth heat the saidvduct I in the channel O' and also that part o'f the duct I extending Linder the duct O. The waste gases in passing along the flue N, located under the iiue K, again heat the air traveling along the said flue K, so that the waste gases are utilized to heat the incoming air used for combustion of the gases.

The main conduit L, as is plainly shown in Fig. 6, is formed in one side wall with flues Q, the upper end of each of which is cou- IOO flue lead ports Q3 into the flue K, so that the` incoming air, passing through the'flu'es-Q, QQ

and Q2, is heated by the outgoing waste gases, and thus receives a preheatingbefore entering the flue K, in which latter the waste gases again heat the air before it is drawn into the duct I to be burned on the indi-Vid-` ual hearth H of each furnace. The end of the conduit L is connected With-an apparatus R for enriching the waste gases which have been cooled, the apparatus being of `any approved `construction `and leading the :enriched` gases to boilers S` forfgenerating steam or for other "purposes, to be `burned therein, and' toinallyconnect with a chimney which furnishes thenecessary draft for-thevarious furnacesG and the'boilers'S. `Itlwill beseen thatalmost` every unitof heat `contained 'in the vaste gasesris utilized z to 'heat th-efincominglairfnecessary fornthe combustion `of the gases in each individual hearth. The `Waste gases thus become cooled before finally entering the enriching apparatus LR to permitof being re-enriched and utilizedfor furnishing the necessary fuel forthe boilers generating steam 'necessary for .running the rollingfmill.

Ineach flue O is arranged ifa valve Ricontrolled from the outside and-servingtomegulate'lthe i outflow of lthewaste. gases .from` the hearthH to the flue N of the mainconduit L. Thusby the use of this valve P the Aburning of :the fuel-:that is, the .gas andair-in .the

hearth H can be regulated to any `desired degree. Itwill beseen that by this `'arrangement one single chimney furnishes the` necessary draftfor the various furnaces,enriehing devices, boilers, dro., arranged :in the plant,

aszsh'own `and described. It will ,further be seenl thatiby this arrangement. the wastezgases from the furnace serve to heattherincoming air necessary Vfor combustion, `whereby thev waste .gases are .broughtto a state Whichlpermits of` enriching the gases as described. uIt is also understood that in the enriching appaundergoes asecond combustion, .generating steam, or using itforother purposes.

`Having thus fully describedmy invention,`

lIclaimas new and desire to `secure by Letters Patent--` 1. lA furnace plant comprisinga series of hearth-furnaces connected with ageneral gas- -supply, an air-duct `for ,each of the said hearth-furnaces and leading `,to .the combus-` tion-chamber of the hearth .to supply theair necessaryforthe combustion ofthe gas, `anda waste-gas duct for each hearth-furnacerand extending under part of the corresponding.

`air-duct andformed `with a channel through `which passes the said air-duct and which channel opens into the respective hearth at the discharge side thereof, substantially as shown and described.

2. A furnace plant comprising a series of hearth-f u rnaces connected with a general gassupply, an air-duct for each of the said hearthfurnaces and leading `to the combustionchalnber of the hearth to supply the air nec- -essary for the combustion of the gas, a wastegas duct for each hearth-furnace and eXtcnding under part of the corresponding air-duct `and formed with a channel through which passes the air-duct and which channel opens into the respective `hearth at the discharge side thereof, and a main conduit for the several hearth-furnaces and `formed with an airiiue 4connected `with .the outer airfand `with each of `the said Vairducts and also :formed with a waste-gas `iue extending underfthe said airfiue andinto which lead `the yseveral waste-.gas ducts, `substantially` as shownvand described.

3. In afurnace plant, the combinationgwith a series of hearth-furnaces `'conn'ectedwith a generalxgasfsupply, of a main .conduitformed with `an arch toadividze the `conduit intotwo iues, `of `which one is Lthe Waste-.gas `iliuefand the'other the air-'supply flue,the-saidwaste gas .iue extending .under 'the `air-supplyflue and connected with `achilnney and with Wastegasvchannelsfrom `theasaid `hearth-furnaces, the said-air-supply` flue being connectedwith the several hearth-furnaces to supply the "air necessary for ,the combustion of the sgae, -substantially` as shown and described.

4. Ina furnace plant, theicornbination,with afseries .of heanthffurnacesconnected `with sa general` gasfsupply,.of a main conduit'formed `with `an archtto .divide the i conduit: into two 1ues,of which one .is i the waste-gasl iue .and the other the air-supply flue,x the said wastegas` fiue extending `underthe h air-supply'tiue and connected with achimneyand witlrwastegas l channels from the said` heanthvfurnaces, the said air-supply fluelbeiugconnectediwith the .several hearthfurnaces 4to supplythelair necessaryfor the combustion offthe.:gas,fand `air-inlet channels arranged in thewsides and bottomf'of the said:conduitandtleadingtoith'e air-supply flue, `substantially as shown s and described.

T5. 'In a furnace plant,the `combination;with arseries of furnaces `connectedlwith ageneral .gas-supplyfof a main conduit havinrguan airsupply flue and `a wastefgas iuepbothwoonnected with the A-seriesnof furnaces,rairinlet channels `arranged* inthe sides and bottom of the conduitand leadingto'theairfsupply flue, and a chimney 0r 4stach connected with the wastefgas flue to furnish draftfor `the entire series. of furnaces, substantiallyasshown and described.

:6. `A .furnace "plant "compri-sing 1.a 1 series` of h'e'arthffurnaces connectedwith a1gas=supply, an airductfor each of the said heartlnfurnaces and leading tothe `combustion-chaniber of thehearth to supply the air necessary for IOO IIO

the combustion of the gas, a Waste-gas duct for each hearth-furnace and extending under part of the corresponding air-duct and formed with a channel through which passes the airduct, each channel openinginto the hearth at the discharge side thereof, and a main conduit for the several hearth-furnaces and provided with an air-flue connected with the outer air and with each of the said air-ducts, awastegas liue extending under the said airue and into Which lead the several Waste-gas ducts, and a Valve arranged in each of the said waste-gas ducts to control the heat Within each of the hearths, substantially as shown and described.

7. A furnace plant comprising a series of hearth-furnaces connected with a gas-supply, an air-duct for each of the said hearth-furnaces and leading to the combustion-chamber of the hearth to supply the air necessary for the combustion of the gas, a Waste-gas duct for each hearth-furnace and extending under part of the corresponding air-duct and formed with a channel through which passes the airduct, each channel opening into the hearth at the discharge side thereof, and a main conduit for' the several hearth-furnaces and provided Witli an air-'flue connected With the outer air and with each of the said air=ducts, a Wastegas flue extending under the said air-liuc and into which lead the several Waste-gas ducts, and a Valve or gate arranged in each of the said air-ducts for controlling the supply of air to each hearth, substantially as shown and described.

8. In a furnace plant, the combination, with a series of furnaces, of a main conduit having an air-supply flue and a Waste-gas flue, both connected with a series of furnaces, air-inlet channels arranged in the sides and bottom of the said conduit and leading to the air-supply line, a chimney or stack connected with the Waste-gas ue to furnish draft for the entire series of furnaces, and an enriching apparatus arranged in the said main conduit between the chimney and the furnace next to it, substantially as shown and described.

JAMES H. WELCH.

Witnesses:

J H. CUNNINGHAM, J. H. GLONINGER.