US1804907A - Boiler - Google Patents

Description

B. wHlrTAM 1,804,907

` BOILER 1926 2 sheets-sheet 1 Filed Dec. 11

; May 12, 1931.

May 12V, A1931. B. BwHn'TAM 1,804,907

' BCILER Filed Dec. 11, 1926 2 Sheets-Sh-eet 2 INVENToR ATTORNEYS Patented May 12, 1931 UNITED STATES PATENT OFFICE BENJAMIN B. WHITTAM, F ELIZABETH, NEW JERSEY, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, 0F BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY BOILER Application led December` 11, 1926. Serial No. 154,093.

This invention relates to a boiler furnace in which rows of tubes extend through the furnace, between which rows of tubes flames are projected from fuel burners. The invention will be understood from the description in connection with the accompanying drawings, in which Fig. 1 is a front elevation partly in section along the` line 1 1 of Fig. 2,; and Fig. 2 is a side elevation partly in section along the line 2 2 of Fig. 1. Reference character 1 indicates fa steam and water drum located above the middle of the furnace and extending longitudinally thereof, and reference character l5 2 indicates two longitudinal side drums at a slightly lower level and parallel to the drum 1. The furnace 3 is below the drums 1 and 2, and lower drums 4 parallel to the drum 1 extend along the lower portion of the furnace. Transverse Idrums or headers 5 and 6 extend along the bottom of the front and rear walls of the furnace, while transverse headers or drums 7 and 8 extend along the upper edges of the front and rear walls of the furnace. Tubes 7 and 8 connect the transverse drums or headers 7 and 8 to middle drum 1. A row of tubes 9. extends along the front wall of the furnace and connects the headers 5 and 7. A similar row of tubes 10 extends along the rear wall of the furnace and connects headers 6 and 8. Rows of tubes 11 with their lower ends bent inwardly extend along side walls of the furnace and connect the drums 2 to the drums 4. The rows of tubes 9, 10 and 11 constitute furnace wall tubes and are covered with tile or cast iron blocks, as shown at 10 and 11. Rows of tubes 12 extend through the furnace and connect the drum 1 to the drums 4, these tubes being so bent that the major portions thereof extend vertically in the furnace, The tubes are so disposed that each row thereof forms a partition extending through the furnace. Fuel burners 13 for powdered coal or other fuel are located along the front wall of the furnace, some of the tubes 9 being bent to accommodate them, in such positions as to pro-l ject flames between the partitions formed of the rows of tubes 12. These partitions thus form cooling screens which will minimize deposition of molten slag upon any heating surfaces disposed above the fur nace. E

Rows of circulating tubes 15 connect the drum l to the side drums 2. Tubes 16 extend from the water space near the front ends of the drums 2 and tubes 17 extend from the water space near the rear ends of the drums 2 to T- unions 18 and 19 below the furnace. Tubes 20 and 21 extend from the T- unions 18 and 19 to the ends of the headers 5 and 6. Tubes 22 and' 23 also extend from the T- unions 18 and 19 to the ends of headers 24 and 25 located below the furnace parallel to the drums 4. Rows of inclined tubes 26 and 27 covered with tile or cast iron blocks extend from the headers 724 and 25 to the drums 4 and constitute the 'side walls of the' ash pit of the furnace.

Pipes 31 lead from the steamspace of the drum 1 to the inlet header 32 of the superheater. The U-shaped superheater tubes 33extend from the inlet header 32 to the outlet header 34. One of the rows 33 of the U-tubes of the superheater may extend upwardly in contact with the roof of they furnace for supporting this roof. A. pipe 35 extends from the outlet header of the superheater to a steam main.

, An economizer 36 is located at the rear of the furnace and an air heater 37 is located behind the economizer with conduits for leading waste products of combustion from the economizer and air heater to a stack in the .usual manner. A dust collector 38 may be located below the waste products passage from the superheater to the econolnizer and a dust pipe 39 with a damper 40 therein leads from the bottom of the dust collector 38 to the dust collector 41 that is located beneath the economizer and air heater. Feed water is led into the bottom of the economizer and flows through the same, thence out through the pipe 42 from. the upper end of the economizer to the rear ends of the drums 2.

Fuel is fed through the fuel burners 13, so that the flames therefrom are projected into the furnace between the partitions formed by the rows of tubes 12 and the hot products of combustion pass upwardly in the furnace, thence through the space on each side of the drum 1 between this drum and the side drums 2, contacting with the circulating tubes 15, thence into contact with the superheater, thence over the economizer tubes and through the air heater to the stack. The feed water entering the economizer 36 passes upwardly, thence from the pipe 42 into the drums 2, thence downwardly through the tubes 16 and 17 to T- unions 18 and 19. The water passes from these T-unions through the tubes 20, 21, 22 and 23 into headers 24 and 25 and drums 4, 5 and 6, thence upwardly as shown by the arrows,along the furnace wall tubes 9, 10, 11 and tubes 12, where steam is generated, the mixture of steam and water passing into the longitudinal drums l and 2, and cross drums 7 and 8. The mixture of steam and water that enters the drums 7 and 8 passes through the tubes 7 and 8 into the middle drum 1. Water also circulates downwardly from the middle drum 1 through the lower tubes of the banks 15 'to the side drums 2, as shown by the arrows, and steam and hot water passes through the upper tubes of the banks 15 back to the drum 1. Steam passes from the steam space of the drum 1 through the tubes 31 to the superheater, thence through the outlet 35 to the steam main. l

I claim: y

. 1. In combination, a furnace having a vertically disposed wall with a plurality of pulverized coal burners therein adaptedlto roject burning fuel into the furnace and engthwise thereof, a steam and water drum extending lengthwise of the furnace, a plurality of vertically disposed rows of water tubes extending lengthwise of the furnace between the burners, and means connecting each of said rows to said drum.

2. In combination, a furnace having a vertically disposed wall with a plurality of burners therein adapted to project burning fuel into the furnace and lengthwise thereof, a central steam and water drum extending lengthwise of the furnace, upper side drums connected to said central drum and parallel thereto, and a plurality of vertically disposed rows of water tubes extending lengthwise of the furnace between the @burners and having their upper ends connected to one of said drums.

3. In combination, a furnace having a vertically disposed wall with'a plurality of burners therein adapted to project burning fuel into the furnace and lengthwise thereof, a central steam and water drum extending lengthwise of the furnace, upper side kdrurns connected to 3said central drum and parallel thereto, a plurality of vertically disposed rows of water tubes extending lengthwise of the furnace between the burners and having their upper ends connected to one of said drums, and lower drums parallel to said upper drums and connected to the lower ends of the tubes inv at least one row.

4. In combination, a furnace having a vertically disposed wall with a plurality of burners thereln adapted to projectA burning fuel into the furnace and lengthwise thereof, a central steam and water drum extending lengthwise of the furnace,'upper side ldrums adjacent the side wall of the furnace, circulators connecting the side drums t0 the central drum, lower drums parallel to said upper drums, a row of tubes in each of the side walls and connected at opposite ends to said upper and lower drums, and rows of vertically disposed tubes extending lengthwise of the furnace between the burners and connected at their upper and lower ends to one of said upper and lower drums, respectively.

5. In combination, a furnace having a vertically disposedmwall with a plurality of burners therein adapted to project burning fuel into the furnace and lengthwise thereof, a central steam and water drum extending lengthwise of the furnace, upper side drums adjacent the side wall of the furnace, circulators connecting the side drums to the central drum, lower drums parallel to said upper drums, a row of tubes in each ofthe side walls and connected at opposite ends to said upper and lower drums, rows of vertically f disposed tubes extending lengthwise` of the furnace between the burners and connected at their upper and lower ends to one of said upper and lower drums, respectively, and rows of tubes disposed in the front and rear walls of the furnace and connected at their upper and lower ends to one of said'upper and lower drums, respectively. 'f

6. In combination, a furnace having a vertically disposed wall with a plurality of burners therem adapted to project burning fuel into the furnace and lengthwise thereof, a central steam and water drum extending lengthwise of the furnace, upper side drums adjacent the side wall of the furnace, circulators connecting the side drums to the central drum, lower drums parallel Kto said upperdrums, a row 'of tubes in each of the sidewalls and connected at yopposite ends to said upper and lower drums, rows of vertically disposed tubes extending lengthwise of the furnace between the burners and colinected at their u'pper and lowerl ends to `one of said upper and lower drums, respectively, and means causing thq'hot gases from the burners t0 iow over said circulators.

- BENJAMIN B. WI-I-ITTAM.

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