US1082597A - Water-tube steam-boiler. - Google Patents

Description

' Losanna..

" nir To all whom 'it may concern:

Be it' known that l, GEORGE M. KOHLER, a citizen of the United States, andnresid ingV at Syracuse, in the county of Onondaga and State of New York, have invented cer' `tain new and useful Yimprovements in Water-Tube Steam-Boilers, of which the following is a specification.

The figure shown in the drawing is a sectional side eleva-tion, showing my improved Water tube steam boiler..

The object of myv invention is to produce .a steam boiler having the following important features: 1st: A large percentage of the heating surface so arranged as to receive heat directly from the fire by radiation'without the necessity of haying more than one fiue gas outlet. 2nd: A large combustion chamber and furnace at the front end of the boiler, having no irebrick arches, with a bank of tubes so arranged as to protect the walls of the furnace from the intense heat of the iire. 3rd: The heating surface, as well as the path of the gases and that of the water, in such relation with each other as to secure the maximum thermal head, insuring the attainment of the lowest.

possible. temperature of escaping gases.

4th: A bank of tubes, with mud and feed drum, void of water circulation and subject to low temperature, for the deposition .of scale and sediment from the feed water.

Referring to the gure, it is seen that my .i boiler is of the N shape type, having an upper' front steam and water drum 1, an

'upper rear steam and water drum 2, lower of steam tubes 16,and a bank of water tubes 17. Drumd is connectedto drum 1 by a bank of either curved or straight tubes 7, drum 4 is also connected to drum 2 by a bank of either curved or'straight tubes 10, thus forming a V shaped superheater space 8, in which -can be placed, and connected tov the steam drum, and outlet pipes, any form of standard superheater 9. -lDrum 3 with the bank of tubes 6 is placed in the position shown for two reasons,-1st: to increase the boiler heating surface in such a manner that enfrenta eration" anoressia. komen, new roert, i

" waren-TUBE STEAM-Bonnin.

n speicanon of Letters Parent. rammen inw; so, 1913 Application filed September 10, 1912. Serial No. 719,6ii6, I

will enable a large amount of heat to enter the tubes by direct radiation from the fire and furnace wall. 2nd: to protect the front 4wall of the combustion chamber from eX- 60 cessive heat and consequent large loss of heat by radiation. n

n order to cause a definite andrapid circulation of walter in the bank of tubes 6, l

employ a bafiie wall 14 placed between the `65 tubes in the manner shown. This bafiie wall protects .one or more rows of tubes in bank 6 from the heat of the gases. Th'econtents y of the tubes exposed to the gases consists of part waterA and partv steam, while: the

contents of the protected rows of tubes is all water.-henc'e arapid circulation takes place in the direction shown by the arrows 18. In addition to the circulation produced,

the baiiiewall 14 protects the'front wall 15 75 from the heatof the furnace gases. Inthis manner radiation losses from the boiler set- I ting isgreatly reduced and a vthinner front wall can be installed.

Another very important and novel feature-,'80 of my boiler is the arrangement of the feed' and mud drum 5, with the bank of tubes 11 connecting this drum with the rear steam and water drum 2. The feed water is fed into the drum 5 and rises very slowly through the 85 i bank of tubes 11, thence to drum 2. The gases from the furnace, after they have passed over the tubes 6 and 7, superheater 9, and tubes 10, pass downwardly vover the tubes 11, while the water in the tubes 1190 flows` upwardly in an opposite direction. This is a great advantage, for since the gas and water :dow in opposite directions, the maximum thermal head is secured, which gives maximum eiiiciency of heat transmission. Furthermore, it is seen that the coldest feed water comes in contact with the gases just as they are about to'leave the boiler setting. lThis enables a lower flue gas temperature to be attained than is possible with any other arrangement of heating surface. A. still greater advantage of this feed drum is the fact that the entering feed water is not heated bruncrdoesit come in contact with any steamer water from the hotter The feed water is heated by 11o in them to even aslightfthick'ness.

The figure shows my boilervtitted iino'lined grate Stoker 2 0', placedat of thev boiler. lf 4iftnintl conirenie lsirab-l'e this 'Stoker v could be plaeed`zat'either or1botli'sides'o The velocityof the risingfeed water intubes l1 is very low, .as all tubes are heated uni`v ornily, and hence no circulation is produced in this bank ot tubes. Bue to the low velocity o-thewater, the scale-and sediment whichl 'is precipitated as the Water is heat.- ed, is deposited. onthese tubes' or' in the 'ud drum, This is' a great advantage, as it prerents scale vfrom" accumulating inthe tubes l0, 7, or 6. Thesetube's are subjected to temperatures-.andwould' 'become a source orn danger iffscale were allowed to accumulatey with an the front theboiler. rilheposition ofthe Sre ir'rel'a#` tion to the tubesgives a very'large ".e f1nibusvtion Chanib'e'r'i'for the 'eiiieient eornbtrstibnt thefluel. Another stillinore important' Eeature of the arrangen'lent of the'gratel and tube-sis `the `Very large amount 'of'. dire't' heating' surface ayailable" for the absorption'. 'of heat by radiation :ronithe fire and. the.- I furnace Wall.

Atant feature' and' advantage. ot this beiten; 'For one square-.tootfofdirect beat-ing sur- This feonsider'a very impers:

i'ace can absorb .and transmit 'to tle water. as. niucl-inbeat -as tenito. fifteen square feet of heating`surface,..wliicii' oan absorb beat only by contactwith the bot gases;-

E desire t'o call attention to'thefaet 'that .there is `no-eonnefeti'on' between `the 'drums and 5, as in some other-boilers havingwtwovv lower/drinns. xAlso that while `my boiler has an shaped. 'combustion chamber; it has a furnace openingl at. thefront' only and does not 'have the disidyajutage of two iiue' gas outlets; -Furtherniore; my boiler has a much larges. direot-y heating-surface. and a smaller amount ot' furnace wa'll subjected'tothe intense heater' the tire than any other ii'ater tube boileryet invented'whieh has onlyv a single furnace' v: inulone Hue out-let.

l claim?? f f l.. fr water tube :boiler ofthe shaped.V

157W 4having' af-furnace and' combustion chamber at' the. front. end:A a pair. of. spaced' transverse steam fand water. drums, 'sai-d "leach other by an upper bant;` i-- steanitubes anda lower baul; of w'ate'rttiibesq a pair of t lower spaced. front andv rear nf'ater drunisf" each-'of saidwater drums bein-g connected by' separa-te banks of -t'ubes to 4one offthe afoi'esaidsteam and-'water druinsdn su'c'h spa-ee, and' thfel-'rear water drum-being 'also connected by another separate 4bank of tubes to the rear steam and water druni in such manner as 'to ineiose a "if shaped superheater space-'substantially as described. v

2.-- A. water' tube-boiler or" the. iii shaped type having a. furnace 'wall and a combustion eliamberat' the 'liront end thereo, al pair of spaeedtransverse steam and water drumst said steam r and Water drums being connected to eali otherby an upper bank of steam drums', each Gif-said Water drumsbeing connleeted, by s parate. otubes to 'the front steam-and Water, drum-1in such inanner esto" inelose an LA shape'c'-urnaee space.

irland the rear water drinn beineal'so oonneet- L. d A a *1t- Q1" ef ed by another separate-banlnof tubesto the rear si arnaud Waterudrurn inrsuch manner -as to, :u 'ielosev ab sliapedsuperheater space,

.of tubes. tozlth'e rearV steam and and .al'bat'tle'" wall separating the aforesaid scribed.

,t'eain and water drun'iS substantially as desteam'v and water drum, a-banlr of tubes lonpla'eed transijersely between said tubes and said baiiieplate'and iyall. 4f. .A steam boiler 'Compri-'sing a walL two upper steam and water drumsJ a large lower drum .tov said steam 'andA Water drums forming. a" lf'i shaped' superheater space therebetween, a-.s'niall lower, water'- drum;- ro-ws of vinclined tubes positioned adjacent 'to the'. front wall' oi" theg-bo'iler' andl and the other one or" said steam and water cruinsA -a battle plate longitudinally posieinen..

GERGE KU Witnesses fr 't9-Aminraisons7 B. CRAIG.

' a feed'fand lwater drain-connected by banks i ter drinny lianltfot` tubesfifrj-o1n that ban-lief 'tubeseonL neetin'g the rear water drum to the rear extending longitudinally' thereof 'substany tially the entire length of said bank O tubes with a row-ot said tubes positioned between Connecting'-saidsnialler lower wate drum tioned betweenl said tubes-n-with one row of tubes between said batiie and the boiler front tubes and a lower bank of. water tubes, av. pair ot'plowerfspaoed' front and rear watery" yliiwater tube boiler eonprising a'wall, 1 lower Airont water druna,y an upper frontA 9G git'udinallypositioned adjacent said wall and connecting said drums7 a baiii'e plate' 'stantially vertical pipes connecting saidfeed.

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