US2598723A - Steam boiler - Google Patents

Description

June 3, 1952 w, SAMPSON 2,598,723

' STEAM BOILER Filed June 2, 1944 3 Sheets-Sheet 1 4 mvENroR WILLIAM SHIV/ 50M ATTORNEY June 3, 1952 w SAMPSON 2,598,723

STEAM BOILER Filed June 2, 1944 3 Sheets-Sheet 2 INVENTOR' VV/LL/AM AMPON ATTOR N E Y Patented June 3, 1952 UNITED FATE NT OFFICE assignor, b y mesne assignments, to Foster Wheeler- Corporation, New York, N. Y., a cor-' notation of NeviYo'rk Application Jun'' Z, 1944;S'ria1N0'. 538,363

In" GreatBritain-July 6, 1943 Thisinvention has reference to I steamboilers of the kind in which separately fired furnaces are arranged side by side and the gases from the one fiow laterally into theother on their'waytothe uptake." When-the furnaces of suchbo'ilersare fired-with liquid, gaseous or -pulverised fuel -fed to burners arranged at the one end of thefurnacesy-the gases of combustion flowing-from the one :furnacethrough the other are apt to interfere with combustion of the fuel issuingfrom'the burners" in the latter furnace unless directed away from the said "burners. In some cases-partitioning-baffles or walls have been provided to direct the gases from the one furnace through the upper part ofthe-other furnace above its corners or through the portion of the furnace remote-from the burner-s so that the ases fromthe one furnace are confined topassagethrough only a comparatively small portion of the other furnace.

According to this=invention in order-toobt'ain distribution of the gases from one furnace overa I greater portion of the other" furnace and at th'e same-time to protectthe burners of the latter furnace from interference by said gases,--a baffie is provided between thefu-rnaces which is ofsuificient depth at the burner end of-the'furnaces to prevent the-gases from-the one furnacefiowing over the :burnersin-theother with decreases in depth-towards the other endofthe furnacesthus enabling the gases from the :one furnace to-enter the other towards the-endremote from: thesectional-elevation of a water tube "boiler-fittedwith one form of bafiie according to the invention, the View beingtaken looking from the rear of theboi ler towards the front thereof. Fig.= 2 is -a side elevationo-f-thebaffle and one of the boiler drums. Figs. 3 and 4 are: views :at right anglesto one another of :part'of a similar boiler showing a modified way of constituting the baffle, "Figs-Z5 being-a horizontal section: on-the line -'5--'5; Fig; 3.

vFig.3; is a view similar to Fig; .;1 but of another embodiment of the -inventicn,-which view is taken on the 1line-6-6 of-Fig. 7, andFigJ? is a sideelevation of t-he baffie shown in Fig. 6. r

Like chara'cters of reference refer to the 'same or-similar'parts throughout the several views.

As shown in-Fig; 1, l represents the burr-termed combustion-from thefurnace: l' passing-oven the burners 4 of the furnace '2,- the "bathe-5 is :pro-- 2 v v-ided constituted by a firebiick wall which decreases in height from the end 6 adjacent to 'the front of the furnaces towards the other end. Iri the modification shown in- Figs. '3, 4 and"5,

the water tubes of two rows '1', 8 are bent to make contact with 'eachoth'er for varying lengths in ordertosecure a ba'ifl'e effect equivalent to that derived by the use of the baffiE, Figl2. V

The baffle also may be formed 'by' filling the spaces between a flow of tubes to Varying depth as illustrated in" Fig". 6.

A tapering eing as referred to may extend to the rear end ll] of the furnaces, as shown in Fig. 2 or may terminate short of the rear en'd 10' as shown in -Figs; 3 and 5; also the decrease in its depth'may commence at some distance from the front end IU' -of the-furnaces, asshown atin Fig-H, and it may continuously-decrease in depth as in the embodiment of the invention illustrated in: Figsa'l to '5 or'decr'ease ina number of steps I 2 as' shown in Fig. "1-.

1. A steam generator comprising a setting, a pairbf' -spaced: groups of generating tubes iii-the setting,- a furnace chamber arranged between the steam generati ngtube groups, burner means for fii ing -said furnace chamber, another furnace chamberin the'settin'g disposed adjacent tubes ofb'n'tifsaid tube groups and outside said firstmentioned turnace chamber, other burner means adjacent the -fii'st-mentioned burner for "sepa rateiy-nring'sam' other chamben a single combustio ga's 'outlet fiueat the outer side of' the othe tube groupand' arranged to receive all of the ga'se's' fiowi'ng from'iboth furnace chambers, said flue being so 'located that the heating gases from theother furnaeechamber flow overboth of the tube g'roups and through the first-mentioned furnace chamber-before entering-the fluepand bathe means between: the furnaces; said bafiie meansbein'g of suchdepth adjacent the burner means as -to prevent gasesfrom the other" furmace: utm nowm over the first rnentioned burner "means; the baffle decreasing" in depth to suchan exte'nt in 'a direction away from"the burners-'as to enable gases from said other furnace-to enter the ignition and combustion 'zone of said first-mentioned furnace beyond the burner means therefor in the direction of flow of'gases in said zone and mixwith gases flowing from-said burners 1 to thereby become distributed throughout an area of the first-mentioned'furnace chamber wh-ichgradually increases: in a direction-away from the burner means.

2. A steamgenerator comprising I a setting; :an upper steam andwaterdrum; a pair- 0f spaced lowerwater drums; a bank'ofinclined-steam gen- V erating tubes connecting said upper drum to one of said lower drums, a group of steam generating tubes connecting the upper drum to the other of said lower water drums, a bafile arranged to divide the space between said tube bank and said tube group into a furnace chamber and another furnace chamber laterally adjoining said firstmentioned furnace chamber, burner means for firing the first-mentioned furnace chamber, other burner means adjacent the first-mentioned burner for independently firing the other furnace chamber, said burner means and said other burner means being disposed to direct a stream of gases ofcombustion in a horizontal direction,

' a Single combustion gas outlet flue at the outer side of the tube bank and arranged'to receive all of the gases flowing from both furnace chambers, said flue being so located that the heating gases from the other furnace chamber flow over the tube, group, the tube bank and through the first-mentionedv furnace chamber before entering the flue, said baffle being of such depth adjacent the burner means as to prevent gases from the uppersteam andwater drum, a pair of spaced tionedfurnace chamber, other burner means adjacent the first-mentioned burner for independently firing the other furnace chamber, said burner means and said other burner means being disposed. to direct a, stream of gases of combustion in a horizontal direction, and a single com'-' bustion gas outletfflue at the, outer side of the tuhebankand arrangedto receive all of the gases flowin from bo h. f rn ce. ch mbe said fl beingso located, that theheating gases fromthe the tube bank and through the first-mentioned furnace, chamber before entering the, flue, said :bafiie being of such depth adjacentv the burner means as to prevent gasesfromthe other furnace 7 from flowing over the first-mentioned burneri' means, the baffle decreasing in depth to such an extent in a. direction away from the burners as to enable gases from said other furnace to flowrlat erally and enter the ignition and combustion zone pair of laterally spaced groups of generating tubes in the setting, a furnace chamber arranged between the steam generating tube groups. burner means at. one end of said furnace chamber positioned to direct a stream of gases of combustion in a horizontal direction toward the opposite end thereof, another furnace chamber in the setting disposed adjacent tubes of one of said tube groups and outside said first-mentioned furnace chamber, other burner means for separately firing said other furnace chamber disposed at the same end of the setting as the first-mentioned burner means to direct a stream of gases of combustion in a horizontal direction toward the opother furnace chamber flow over the tube group,

oftsaid firstmentioned'furnace beyond the burner means therefor-in the direction of flow ofgases in said zone and mix with gases flowingfrom said burners'to thereby become distributed throughout an area of the first-mentioned furnacecham- 1 berwhich gradually increases in depthin a d-irec-' posite end of the setting, a single combustion gas outlet flue at the outer side of the other tube group and arranged to receive all of said gasesflowing from both furnace chambers, said flue being so located that the heating gases from said other furnace. chamber flow over both of the tube groups and across the first-mentioned furnace chamber before entering the flue, and substantially vertically extending baffle means between the furnaces, said bafiie means being of such depth adjacent the burner means as to prevent gases from the other furnace from flowing overthe first mentioned burner means, the baffle decreasing in depth towards the other end of the furnaces to such an extent as to enable gases from said other furnace to enter the ignition and combustion zone of said first-mentioned furnace beyond the burner means therefor in the direction of flow of gases in said zone and mix with gases flowing from said burners to thereby :become'distributed throughout an area of the first-mentioned furnace chamber which radually increases in depth in a direction away from the burner means.

5. A steam generator comprising a setting, an

upper steam and water drum, a pair of spaced lower water drums, a bank of inclined steam generating tubesconnecting said upper drum to one of said lower drums, a group of steam generating tubes connecting'the upper drum to the other of said lower water drums, a baflle arranged to divide the space between said tube bank and saidtube group into a furnace chamber and another furnace chamber laterally adjoining said first-mentioned furnace chamber, burner means at one end of said furnace chamber positioned to direct a stream of gases of combustion ina horizontal direction toward the opposite end thereof, other burner means for separately firing said other furnace chamber disposed at, the same end of the setting as the first-mentioned burner means to. direct a stream of gases of combustion in a horizontal direction toward the opposite end of the setting, a single combustion gas outlet fine at the outer side of said tube bank and arranged to receive all of the gases flowing from both furnace chambers, said flue being so located that the heating gases from the other furnace chamber flow over the tube group, the

tube bank and through the first-mentionedfurnace chamber before entering the flue, and-substantially vertically extending baflie'means between the furnaces, of such depth adjacent the burner meansas toprevent gases from the other furnace from flowing over the first-mentioned burner means, the baffle decreasing in depth towards the other end of the furnaces to'such an extent as to enable gases from said otherfurnace to enter the ignition and combustion zone of said first-mentioned furnace beyond the burner means therefor in the direction of fl0w-of gases come distributed throughout an area of the Vfirst- 'mentionedfurnace chamber which gradually increasesin a direction away from the burner :A e m e erat r comp sineas t ne at u per steam and water drum, a pair of spaced lower: water drums, a bankof inclined steam V ene a tubes con c i sai upper drum t ,Qnepf said lower drums, a group of steam gen.- at g tu es: conn ti g th u p rdrum to t other ofsaidlower water drums, a substantially furnacechambenburner means for firing the first-mentioned furnace chamber, other burner means adjacent the first-mentioned burner for independently firing the other furnace chamber,

said burner means and said other burner means beingdisposedto direct a stream of gases of combustion in a; horizontal direction, a single combustion as Outlet flue at the outer side of the tube bank and arranged to receive all of the gases,

flowing from'both furnace chambers, said flue being so locatedthat the heating gases from the other furnace chamber flow overthe tube group, the-tubebanl; and through the first mentioned furnace chamber before entering the flue, said baffle plate at the end thereof adjacent saidv b n r exte in u wardly to a po e the burnersto prevent gases from the other furnace from flowing *over the first-mentioned burner means, the upper edge of the baflle being tapered to suc a e t f o a p t ad ac t Y he bur e s. n a irec i n w the e dmr s to proyide, a flow area for gases from said other furnacechamber which area gradually increases in a direction away from the burner means and through which gases from'the other furnace enter the ignition and combustion zone of said firstmentioned furnace beyond the burner means therefor and'mix with gases flowing from said burners to thereby become distributed throughout an area of the first-mentioned furnace cham-- bar which graduallyincreases in depth in a direction away from the burner means. V U

11. A steam generator comprising a setting, a

pair of laterally spaced groups of generating tubes in the setting, a furnace chamber arranged betweenthe steam generating tube groups, one

f sa d; tube rou s ha t ast two a acent rows of tubes, burner'means for firing said furnace chamber, another furnace chamber in the setting disposed adjacent tubes of said one of the tube roups and outSide said first-mentioned furnace-chamber, other burner means adjacent th firs eme t one bu ne f r e a ately fir said other chamber, said burner means and said other; burner means being disposed to direct a stream; of gases of combustion in a-horizontal direction, and asingle combustiongas outlet flue at. the outer sideof the other tube groupand arrangedv o receive all of e ses f i g from bothfurnac chambers, sa d fiuebeing so lo ated thatither heating gases from, the other furnace chamber flow over both of the tubegroups and through the first-mentioned furnace chamber before entering, the flue; and a. substantially vertically extendin tbafile means comprising at least tion-of flow of gases insaid zone andmix with gases, flowing from saidburners to thereby become'distributed throughout an area of the first,-

mentioned furnace chamber which gradually increases in a direction away from the burner me ns." a V 7 1-2. A steam generator comprising a setting, upper steam and water drum, a pair of spaced lower water drums, a bank of inclined steam gen-'- eratins'vtubes connecting the upper drum to the one of said lower drums, a group of steam generating tubes connecting'theupper drum to the other of said lower water drums, said group of tubes having at least two adjacent rows of tubes, said adjacent rows of tubes being in engagement with one another to form a substantially vertically extending baflle which divides the space between said tube bank and said tube group into a furnace chamberand another furnace chamber laterally adjoining said first-mentioned furnace chamber, burner means at one end of said furnace chamber positioned to direct a stream of ases of combustion in a substantially horizontal direction toward the opposite end thereof, other burner means for separately flring said other furnace chamber disposed at the same, end of the-setting; as the first mentioned burner means to direct a stream of gases of com,- bustion in a substantially horizontal direction toward the opposite end ofthe setting a single combustion ,gasoutlet flue at the outer sideof said, tube bank and arranged to receive all, of the gases flowing from both furnace chambers. said flue being so located that the heating gases from the other furnace chamber flow over the tube group, the tube bank andthrough the firstmentioned furnace chamber before entering the flue, the engagin portion adjacent the burners being such that the first-mentioned burner means is shielded fromthe, gases from said other furnace chamber, the engaging portioniof; said tubeslbecoming less in a directionaway from the burners to such an extent as to enable gases from said other furnace to enter'the ignition andioombustion zone of said first-mentioned furnace beyond the burner means therefor in the direction of flow of gases in said zone. and mix with gases flowing from said burners to thereby become dis-.- tributed throughout an area of the first-men.- tioned furnace chamber which gradually increases in. a direction away from the burner means- 7 WILLIAM SAMPSON.

7 REFERENCES, CITED. The following references are of record inthe file of this patent: j V UNITED STATES PATENTS Number: I

Name Date 2,241,932 Rehm 5 May 13, 19.41 2,387,998 Kessler Oct.,3,0', 19.45

' FOREIGNPATENTS Number Country 7 Date- 538,008- Great Britain July 16, 1,941

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