US2366717A - Apparatus for generating and superheating steam - Google Patents

Description

M. FRISCH A 2,366,717

APPARATUS FOR GENERATING AND SUPERHEATING STEAM Jan. 9, 1945.

2 Sheets-Sheet 1 Filed Nov. 29, 1940 IINVENTOR ART/N fie/sch BY ATTORNEY ,Wr k1 g v w r. m M T w i N 6 4 Z S: A, w y 7% x l 1 w. f v m 5 mw M. FRISCH' 2,366,717

APPARATUS FOR GENERATING AND SUPERHEATING STEAM Jan. 9, 1945.

2 Sheets-Sheet 2 Filed Nov. 29, 1940 I l/1x1 0.00.0JOOOQQQUQIIIQIQIIOQIA IOOOOOOOOOODOOOOOOOOOOOOOOO oooooooooooooooooooooooo. w oooooooooooooooooooooooo n oooooooooooooooooooooooooo 0000ooooooooooooooocoooooooooc coo00000000oooooooooooooooooo9 oooooooooooooooooooooeoooooooo conooooooooooooooooooooouooooo oooooooooooooooooooooooooooooo oooooodooooooocooo000000000 n o000oooooooooooooooooooooo o 0ooooooooooooooooooooococoon DDIOOOOOOODOODOOOOOOODDDDDDOD @WWW ATTORNEY h thereof, and in which:

The inner boundary of the furnace I9 defined by verticalbafile walls 23 and 24 which Patented Jan. 9, 1945 APPARATUS FOR GENERATING AND SUPERHEATING STEAM r Martin Friscli; New York, N. Yg, assignor to Fo s-l ter Wheeler Corporation, New York, N. Y a

corporation of New York Application November 29, 1940, Serial No. 367,802 tonn (or; 122--478) I This'invention relates to :vapor generators and more particularly pertains to apparatus for gen erating and superheating. steam.

The invention provides a multiple furnace superheating steam generator of novel and compact arrangement with which superheat control at all loads on the generatoris obtained. 6

The features and advantages which characterizethe invention will be understood from the following description considered in connection with the accompanying drawings forming a part Fig; 1. is a vertical sectional view of asteam generator embodying the invention;

i Fig. 2 is a horizontal line 22 of Fig. 1; i p

Fig.3 isa horizontal sectional view taken on line 33of Fig. 1 a i a Fig. 4is a horizontal sectional view takenon line 4-4 of Fig. 1, and l I Fig; 5 is a horizontal sectional view taken on line55 ofFig. 1. Like characters of reference refer to the sanie parts throughout the several views.

. Referring to the drawings, the steam generator illustrated hasvertical refractory sidewalls II 3, a front wall'not shown,-

and I2, a. rear wall. I and roof portions I4 and I5. Adjacent the roof portion I5is a steam and water drum I 6, and between the latter androof portion I4 is a flue gas outlet I'I. Within thewsettingmareitwo spaced furnaces I8 and I9 which are disposed adjacent the sidewalls I I and I 2; respectively. The inner boundary of the furnace I8 is defined by vertical bafilewalls20 and-2| which are'in vertical alignment with, but spaced from, eachother to provide a gas outlet 22 in the lower portion of the furnace.

is similarly also are spaced to provide a gas outlet lower. portion of the furnace; One or more fuel burners 26, which-are disposed in the roof portion I4 of the setting, fire the furnace I8, and one or 25111 the more similar burners g'Iadisposed in the roof portion I5 and operated independently of the burners 26, fire the;furnace '19. Each of the burners 26 and 21 may be individually controlled to fire at any intensity fromzero to maximum. The side walls II and I2 areincline'd inwardly adjacent their lower ends to provide-hopper shaped bottoms for each of the furnaces which discharge into suitable ash pits 28 and 29 respectively. Extending between the upper drum parallelto the upper drum, is. a vertical bank ofsteam generating tubes 3! which are swept by sectionaltview taken on I6 and a. lower drum 3!),

. gas outlet I'I through a vertical gas passage prothe gases flowing from the furnace I9 to the flue vided by bafiles 32 and 33. The baffle 32 extends downwardly from the drum I6, parallel with the tubes 3|, to a point adjacentthe furnace gas outlet 25, whereit is joined to the bafile 23 by a horizontally inclined bafile 34. The baflle 33-extends upwardly from 'a soot hopper 35 below the drum 30, to a point adjacent the upper ends of the tubes3l. l

The inner surface of the sidewall II is lined with vertical Water wall tubes 36 which extend across the roof portion l Hland are connected at their upper ends to the drum Hi, the lower ends being alternately connected to headers 31 and 38 which are supplied with circulating water by suitable external downcomer connections, not shown. The inner surface of the side wallIZ is similarly which extend to the drum I6 from lower headers j I 6 43 and 44 which are connected intothe boiler circulation. Adjacent the gas outlet. 25, the tubes 42 are spread .apart t -provide a passage for the gases. rear wall 13' which is at the rear end of the furnace I8 is lined withwater wall tubes 45, and the innersurface of the wall I3 at the rear of the furnace I9 is similarly lined by water wall tubes 46. It willbe understoodthat those parts of the inner surfaces of the front wall, not shown, which are at the front ends of the furnaces are lined with similar water wall tubes. I

In the form shown; a combination, radiant and convection superheateris utilized and is so arranged anddisposed that it is subject to the heat of the gases produced in one furnace only; In the superheater furnace I8, the furnace side of the baffle walls 20 and- 2| are lined with vertical radiant heat superheater tubes 41 and 48, which are alternately disposed, and tangent to each other,'as shown in Fig. 3, and form a continuous panel or section of radiant heat absorbing surface except at the furnace gas outlet passage 22, where the tubes are spread apart and bent out- Wardly from the furnace as shown in Fig. 4. The tubes 41, which areconnected to the steam space of thedrum. IS in two spaced longitudinal rows as shown in Fig. 5, conduct steam downwardly in one pass to a lower header from which the That part of the inner surfaceof the ting and through which gases flow in one direction from the furnace outlet to the outlet of the setting, vapor generating surface in said gas passage, means forming another gas passage in said space extending between the outlet of another furnace and the gas outlet of the setting and through which gases flow in one direction from the other furnace outlet to the outlet of the setting, and a superheater having a part thereof disposed adjacent a wall of the other furnace and another part disposed in said other gas passage.

4. Vapor generating apparatus comprising a setting, spaced furnaces in the setting, means in the upper part of each furnace for firing the furnace, each furnace having an outlet in the lower part of the furnace in communication with the space between the furnaces, the outlet of at setting, a vapor and liquid drum in the setting, spaced furnaces in the setting, vapor generating surface in each of the furnaces, means in the upper part of each furnace for firing the furnace, each furnace having an outlet opening in the lower part of the furnace in communication with the space between the furnaces, said firing means being arranged to direct the gases of combustion toward said outlets, the setting having a gas outlet in the upper portion thereof in comface in said gas passage, means forming another least one furnace being in the side thereof adjacent said space, said firing means being arranged to direct the gases of combustion toward said outlets, the setting having a gas outlet in the upper portion thereof in communication with said space, means forming one gas passage in said space extending between the outlet of'said one furnace and the gas outlet of the setting and through which gases flow in one direction from the furnace outlet to the outlet of the setting, a superheater, having a part thereof disposed in the one furnace adjacent said side thereof and extending over the furnace outlet, the superheater having another part in said gaspassage, means forming another gas passage in said space extending between the outlet of another furnace and the gas outlet of the setting and through which gases pass in one direction from the other furnace outlet to the outlet of the setting, and

vapor generating surface in said gas passage. 5. Vapor generating apparatus comprising a gas passage in said space extending between the outlet opening of another furnace and the gas outlet of the setting and through which gases flow in an upward direction only from the other furnace outlet to the outlet of the setting, and a superheater having tubular members connected to the vapor space of the drum, said tubular members extending vertically downwardly within the other furnace adjacent a wall thereof to the lower part of the furnace and in spaced relationship to each other, other tubular members connecting with the lower ends of the first tubular member and extending upwardly within the-furnace adjacent said wall thereof and intermediate the first tubular members, said other tubular members connecting with tubular members disposed outside of said furnace and in the path of the gases flowing from the furnace to the gas outlet for the setting in said other gas passage.

MARTIN FRISCH,

CERTIFICATE OF CORRECTION.

Patent No, 2,566,7 7. January 9, 9 5 1 MARTIN FRISCH.

, and that the said Letters Pat- Leslie Frazer Acting Commissioner of Patents.

. Page 2, first I

Images