US1781269A - Boiler furnace - Google Patents

Description

Nov. 11, 1930. H. COERPER BOILER FURNACE Filed Dec. 3, 1,925

waste outlet B toward the lower portion of the combustion chamber at the rear. That is.

' to say, spaces are provided betweenthe tubes Patented Now ll,

" .DELAWABE w Hales eqngarnaor spawn-I LA D, EW YORK, nssiemonmo INTERNATIQNAL GQIL =CBUSTIONYENGINEERING CORPORATION, on New yon z, y flayoonnonarzon OFJ This invention relates to boiler-furnaces,

particularly for stationary installations burning fuel in finely divided form such as pulverized coal. e e One of the primary objects of the invention is to provide a novel arrangement of boiler-furnace wherein I am enabled to generate a large quantity of steam with but a small portion of the evaporating area heretofore required in standardpractice.

e Other and more specificobjects and advantages will appear hereinafter. How the foregoing, together with such other objects and advantages as are incident to myyinvention, are realized,.is illustrated in the accompanying drawings, wherein Fig. 1 1s a-vertical sectlon thru an installation embodying my improvements in pre-.

ferred form, and

. Fig. 2 is a sectional view illustrating ade-.

tail ofmy invention. V Referring now to Fig. 1 of the drawings, the referencecharacter A denotes the combustion chamber. The combustion space of this chamber is defined by a front water wall a, side water wall I), and a rear water wall 0. These water walls are/composed of upright tubes 7 having longitudinally extending fins 8 welded or otherwise secured thereto, the fins and tubes cooperating to form a practically continuous metallic wall. The fins on the tubes constitutin the water wall extend only part way. romthe upper end of said tubes toward the bottom leaving the of the rear water wall immediately above the bridge wall 9, thruwhich spaces thewaste products leave the combustion space.

r The top of the combustionspace is defined by a water wall d, thebottom of thecombustion space is defined by a water screen f. The water screen is composed of tubes sufficiently widely spaced apart to permit the gravitating refuse leaving the fuel and flame stream to flowfreely therebetween into the ash pit g,

the screen serving to cool the refuse particles while in transit to a non-molten state. The

1 lower ends of thetubes of the front water BOILER FURNACE l l Wan passf b wardlylthru i h al el l g fill forconnection into the drum or header 11.

The upper ends of the tubes offthis wall outwardly thru theroo f sheathing or arch slieathing12to the header 13. The tubes of d the upper Water, Iwall "extend from theheader stre m l fro -lt d mb .h d 11 l the junction blocks. 15 into whichjjunction blocks the: lower ends of (the tubes of the: rear water walhare connected, Thefupper en tthQtHb SDft Q i fl rwel on 1 nctinto-the header 1.6 which inturnis con nected tathelclrum 1 1. Water i s supplied from the lower ormudclr'uin 17 tothe header or drum 11 bymeans of afs itable downc orner ordowncon ersl8. {Thus-Jcirculation from. 1

rdly t i the ree (an he rea W t wall and front water wall and the top "water wall to the drum 14 and thenceito the drum 1? thru certain 01171 the bank oftubesja. ends of the tubes f {P PE Side water Walls 61X end u w a f llyflfojr connection into the head;

re 1.9 1 96 es etiwl A dovnconier qr dojwncori ers. 211. connectthe drum 14; to the lewerkendof the headers. and the upper end of the headers l9 are. connectejdfto the drumle by, the .upcomerl. connections 22.

@frhe fumaceshaped boiler thusidescribed is subjected to radiant. heat and," therefore, will absorb heat at a very high rate and produce an enormous quantity ofmsteam by virtue .I.;Hence, I am enabled to provide a bo ler-iurnace of very small ,size 1n compari 80111150 a d r ia ti awhe e i h o pr duce ayery large'quantity efsteam. Because of the high rateof heat transmission, the tendency lof the water walls 9 is to lower fut m e t peaumnd to in e e w preper combustion. .,To meet this condition I supply the fuel and air required for combustion in such manner as to produce turbulent wmbust 'and. a shart fla efa edmpanied by. -inc ease n. a e: temp rat re. hea 'Ifodtliis end I supply thefuel by two sets burners. 23 and 24 be directly at n ir e y suppl d fW hI Po d e (1 and e rryi e a r h e he Sets of a nea massed sex l w wi th enta ing sheets of fuel I to impinge upon one another with violent mixing and turbulence.- The additional air required for combustion is supplied thru" the horizontal ducts extending around the upright water walls. Highly preheated air; heated'in a manner to be here;

" ina fter described, is introduced into these ducts from the breaching or casing 26 and enters thegcombustion space thru spaces :27 provided. by interrupting the fin s'lon certain;

ofthe tubes. 'This air-is preferablyintroe duced under pressure as by means of thefan, if,

upni-ghtrow with the header'means of the other upright row, economizer'means includ-v ing connected upper and lower drums, the

:upper end-s of theupright rows of tubes ib'ei ig' connected-to said upperdrum and down-FE comer means connecting said .economizer 7 means toone of said headers. I In testimony'whereot I ;signed my name; a.

(not shown) which fan forces the air thru the preheater 28 into the breaching or casing' 26.

This additional air mixes with the fuel, addi I ing to 'tl el turbulence and producing violent and intense combustion, with a flame of high tem eratur the. fuel being burned with a f short flame, whichj'is alsonecessary by ijir'tue ofthe fact that the waste outlet is toward the. bottom of the combustion space.

g The amount of evaporating surfaceffor the combustion chamber is such that-the waste gases'leave at a high tempera-tureandenter I the b ank' of tubes kwhich is batHed in the] manner indicated. From this pass the gases" are eventuallyledt'oa second bank of tubes '2' and from there to'the ofltake 29 in which" it 7 the preheater'isjlocated. The bank oftubes 30' V i -tions. j The tubes'of the bank h are connected it and iv constitutesi'n efle'ct economizerfsec tothe drums 14 'andc17,the tubesofthebank '2'" connect the drum 30 with the drum 17 and v tubes 31, connect the d'rums 14: and 30 'Thus',1

' connected into fonesystem, local circulation" altho all the boiler elements are" in; a sense occursth'ruthe banks hand i and 31 as it does in the units definingfthe combustion' Y fins 32 for this purpose i g g v V A high ee o p e t-: 1? t e com e tion air is obtained because'of thefihightemerature" at whichgthegases leave the'jbank v of tubes '5; "Inthis 'connectionitv is tofbe V noted that fora given output,the size oftheir boiler as a whole will be very. much smaller than that which wouldbe required in a stand- 7 I ard practice, in consequence of which not only? bustionchanlber but' also the tubes of the banks and iwill' 'be'of comparatively short l length; besides which the number of tubes employedinthe banks handiz' willnot be larger" V vWhat Iclaim is Y The combination withajfinely divided fuel burning furnace" of a boiler including "two rowsfof substantially upright tubes defining combustion space; headermeans at the lower end of the tubes of each" row, a row of tubes extending across he lower portionof thefur naceandconnecting the header means of one the'tubes ofthe uprightf'walls of the comhave hereunto

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