US1498842A - Reversible regenerative furnace - Google Patents

Description

June 24 1921!'.`

A. V. KEMP REVERSIBLE REGENERAJIIVE FURNACE Filed oct. 12'. 1923 2 Sheets-Sheet 1 y/ms Arm/'nefs' Patented June 24, 1924'.

ALFRED-VNCENT KEMP; OF LONDON, ENGLAND.

REVERSIBLE. R".SGrlllilERATIVIE FRACEL Application filed October '12, 1923.v Seiial'No. 668,133.y

Beit known 1that I, Amann `Vmcnv'r KEMP, a subject" of the King of 1 Great* Britain, residingat BG-BSIKingsway, in the countyfof London, England, haveinvented new and usefullImprovements in rteversible" Regenerative Furnaces, of' which'tlie following is af specific-ation.

This invention relates toreversi'ble regenerativev open heartl'i furnaces andy hasI `for its object to provide, at eachend-offl the furnace, distinct, or separate, and reversible, structures for conveying the heated' air and gases from the regenerators,to such furnaces and for conveying the-products of combustionfrom-the said furnaces-tothe downtakesA ofthe regenerators, as hereinafter explainethA According to this invention, at each end of the furnace thereare-providedtwo distinctandl separate structures," which are termed blocks, one block at each end containinigairl and gas ports for 'conveying-thc air antigas from'the regenerators=intofthe furnace and the other block` ati eachi end containing a port, orf ports, for conveying the productsof combustion from the furnace to the downtakes of the regeneratorsw At each. endI of# the furnace, the said blocksfare either inde pendently, or jointly., -movable,` so that, (when the furnace is "miope-ration) at one endy the'- blockl containing fthe air-and gas ports is vin position tov convey air and gas into the furnace, whilstat the other end-the* block containing the port, or ports, through which the products of combustion from the furnace pass is in position over the downtakes of the regenerators, the other blockaat the respective ends of the furnace,being in their inoperative positions. 'When the direction of the flow of the gases through the furnace isfto be reversed the blocks at each end of the furnace are moved, so that the blocks which were before in their inoperative positions, are brought into their operative positions and the blocks which were before in their operative positions are brought into their inoperative positions.

The blocks at each end of the furnace are mounted on a carriage, or the equivalent, whereby they can be conveniently moved to the required positions and they are preferably so disposed that the either block which for the time being is in its inoperative position can, if desired, be removed from the carriage, or the like, and be replaced by another blocl, thus obviating the necessity forv stopping thefuriiace in case, for instance, offl a blockJ requiring repair.

The accompanying drawings illust-rate `a construction in* accordance with thisinvention shewinlg how-itmaly'fbe carried into effect, -butfitds'to be understood' that the inventionffis not*y limited tol theI precise -details illustrated Figurel is a longitudinal section shewi'ng the two endsl of anopeirhearth furnace, but? with themid-=pa`r-t omitted. Figure'is3 a' plain (partly/in sectionl of Figurel and Figure 3 is 'a-vertigeal-sectionon 'the line tc, a', Figure 2. The aforesaid blocks `4at-one end of the furnace ai-emarketi, that lfor the gasand air A, and thatforfPthe-exhaustgases B and at=theI other end/of jth'effurnace the corresponding blocks are mankechA2- and B12v respectively.I v

l/Vith the parts in the positions shewi'in thedrawings, gasVfpasses-froni -tlie gas regeneratorfbywayof theI up-take l y'to'the port 2 'at the exit ofuwhich itfnieets, at A, the air which-passes fromA the air regeneratorf, by wayofthe-fuptakef,and, at the place wherethesaid gas and air meet-,lconrv bustion-'tales place 'andthe lproduotsof' com bustiony pass along; thefurnace tothefexit port-5, andlinto the bloclrBg' at "the other` end, wherea portion goes downfbythedown-A take 6, to heat the lair fregenerator, the'other. portionV going'. downv =by `fthe'- downtaleVE 7 to heat the-gas regener-atonf v y Thefgas port yatA l2 mayl be; madez of iany suitableinateriall, forl instance, of cast; steehi mild steel; cast iron' 0.1"other1suitable 'ma terial. i Thesaidga'sport is shewn as. being jacketed and cooled by water, circulating by means of pipes a ai.

In the drawing the blocks A and B2 are shewn in the positions in which the heated gas and air are entering the furnace, from the regenerators at the left-hand end of the furnace and the exhaust gases are passing to the regenerators at the right-hand end of the furnace, the block B (for exhaust at the left-hand end) and the block A2 (for admission of gas and air at the right-hand end) heilig in their inoperative positions.

When the furnace is reversed the blocks A and B2 which, in the drawings, are shewn in their operative positions are moved into their inoperative position and the blocks B and A2 which, in the drawing,

are shewn in their inoperative position are moved into their operative position.

These movements, in the construction illustrated, are shewn as being effected by mounting the pair of blocks, at each end of the furnace, upon a carriage C, which can run on rails d, on a frame D, arranged at right angles to the length of the furnace these rails having turned-up ends cl2 constituting stops, the said frame being pivoted at d3 and the carriage C being traversed by the plunger of the hydraulic cylinder E, centred at e, to follow the lifting movement of the frame D, upon its fulcrum di", effected by the plunger of the hydraulic cylinder F, for lifting the dippers g clear of the trough part g2, of the seal to allow of the traversing movements of the carriage. At the end of each movement of the carriage C the hydraulic cylinder F, allows the frame D to descend and the dipper g, of the block which has then been brought into position, to enter the trough-part g2 of the seal. It will be seen that the block for the time being out of operation can be readily repaired, and if required removed and replaced without stopping the furnace.

The described means of effecting the required movements are considered most convenient, but any other suitable means may be used.

In the arrangement described the structures containing the air and gas inlet ports are not exposed to the action of the intensely hot outgoing gases and they therefore retain their shape and original port proportions and ensure proper flame control and rapid heating and melting of the charges. By providing separate structures, such as are herein termed blocks, respec" tively for the ingoing air and gases and for the products of combustion, each structure can, of course, be designed independently for its particular purpose and the correct proportions be given to each structure, so that high velocity can be obtained at the end of the furnace which for the time being is the ingoing end whilst low velocity can be obtained at the end of the said furnace which for the time being is the outgoing end and the best conditions for the ingoing air and gases can be arranged absolutely independently of the best conditions necessary for the outgoing products of combustion passing from the furnace to the downtakes of the regenerators, the ingoing air and gases and the outgoing products of combustion being distinctly and separately controllable by suitably proportioning the ports in the respective structures and practically even heating of the hearth, from end to end of the furnace, can be attained.

The improvements according to this invention can be readily applied to any eX- isting, or known, type of reversible regenerative furnace, of the open hearth type.

lVhat I claim is l. In reversible regenerative open hearth furnaces, two distinctly separate structures at each end of the furnace, one structure containing the ports for the admission of the heated gas and air to the furnace, and the other containing the port for conveying the products of combustion to the regenerators, and means for reversing the positions of the said structures relatively to the passages communicating with the regenerators and the furnace hearth, substantially as described;

2. In a furnace according to claim l, the means for reversing the positions of said structures including a carriage for each pair of structures such that the structures at each end of the furnace, can be moved into, and outV of, operative position, and allow, whilst the furnace is in operation, of the removal and replacement of the structure which is in its inoperative position.

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

ALFRED VNCENT KEMP.

l/Vitnesses z G. BARKER, CYRIL Bnoiur.

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