US1949638A

US1949638A - Furnace wall

Info

Publication number: US1949638A
Application number: US396476A
Authority: US
Inventors: Thomas C Toomey
Original assignee: Fuller Lehigh Co
Current assignee: Fuller Lehigh Co
Priority date: 1929-10-01
Filing date: 1929-10-01
Publication date: 1934-03-06
Anticipated expiration: 1951-03-06

Description

March 6, 1934. T, c TQQMEY 1,949,638

FURNACE WALL Filed Oct. 1, 1929 3 Sheets-Sheet l INVENTOR FIG. I W

ATTORNEW March 6, 1934. T. c TOQMEY 1,949,638

FURNACE WALL Filed Oct. 1929 3 Sheets-Sheet 2 Ji 6 1- INVENTOR FIG. 2 BY W :T%W

March 1934- T. c. TOOMEY 49, 38

' FURNACE WALL Filed Oct. 1, 1929 3 $heets-Sheet 3 u I? a y INVENTOR Patented Mar. 6, 1934 UNITED STATES PATENT OFFICE FURNACE WALL poration of Delaware Application October 1,

3 Claims.

This invention relates to a furnace wall that has water tubes therein and is supported at the bottom. A boiler is located above the furnace wall and a slip joint is provided between the upper edge of the furnace wall and the boiler proper.

The invention will be understood from the description in connection with the accompanying drawings, in which Fig. 1 is a vertical section through an illustrative embodiment of the invention; Fig. 2 is a similar section at right angles to Fig. 1; Figs. 3, 4 and 5 are vertical sections on an enlarged scale, partly broken away, showing some of the details.

In the drawings, reference character 1 indicates a furnace above which a boiler'of the Babcock & Wilcox type, for example, may be located. As illustrated, this boiler comprises the usual steam and water drum 2, bank of inclined tubes 3 and superheater 4.

A-row of upwardly extending tubes 5 is provided along the front wall of the furnace, the upper ends of these tubes being bent outwardly and extending into the upper header 6, while the lower ends of the tubes 5 extend straight downwardly and enter the lower header 7 that lies in the plane of this wall. One or more return circulation tubes 8 lie outside of the furnace connecting headers 6 and 7. The lower header 7 is supported upon a fixed support 9 which thereby also supports the front wall of the furnace.

A row of tubes 10 is provided along the rear wall of the furnace, the upper ends of these tubes extending outwardly and entering the upper header 11 while the lower ends extend straight downwardly and enter the lower header 12. One or more return circulation tubes 13 located outside of the furnace connects the headers 11 and 12. The lower header 12 is supported upon fixed support 14 which thereby supports the rear wall of the furnace.

A row of upwardly extending tubes 15 is lo!- cated along each side wall of the furnace (Fig. 2), the upper ends of these tubes extending outwardly into upper headers 16 and the lower ends extending straight downwardly into the lower headers 1'7. The headers 1'7 are supported upon fixed supports 19 which also support the side walls of the furnace.

The floor 20 of the furnace is supported in a fixed position by means of spaced transverse supports 21 and the edges of the floor contact with the walls of the furnace so that molten slag can collect in the lower portion of the furnace and 1929, Serial No. 396,476

expand upwardly. Transverse cross supports 23 are provided along the outside walls of the furnace and are connected to the

tubes

5, 10 and 15 by means of tie clamps 24 on these tubes, slotted. holes being provided in these clamps to permit movement of tubes due to expansion and contraction, while the supports 23 are held in fixed positions.

The wall tubes may be lined with the well known Bailey blocks 25 that are connected to the tubes to complete the wall structure. Fuel burners 26 are indicated along the front wall of the furnace. The wall tubes may be connected to the circulation system of the boiler, the connection from the upper headers to the steam and water drum being indicated by the tubes 27, and the connections from the water space of the boiler to the lower ends of the wall tubes being arranged in any convenient or well known way.

Sections of brick work or tile 28 and 29 are shown near the upper edges of the front and rear walls of the furnace above the outwardly extending portions of the tubes and below the boiler parts.

- The slip joint 30 to take care of expansion and contraction at the upper end of the front wall of the furnace is shown most clearly in Fig. 3. The uppermost row of tile 28 is provided with a ledge 31 that projects into a corresponding recess 32 in the fixed tile 33, so that a sliding joint is provided between the edges of the ledge 31 and recess 32. A metal plate 34 is provided along the outer edge of the slip joint 30. The tile be tween the metal plate 34 and the inside of the furnace protect the plate from the heat of the furnace.

The upper header 11 for the row of tubes at the rear wall of the furnace is partially supported by means of springs 35 below the header. The upper portion of the wall extends inwardly to some extent as indicated at 36. The springs 35 rest upon the support 37 and spring supports 38 extend from the support 37 to lugs 39 attached to the inwardly bent portions of the tubes 10 to take a portion of the weight of the rear wall of the furnace.

The slip joint at the upper edges of the side walls of the furnace is shown more clearly in Fig. 5. The fixed transverse I beam support 40 supports the metallic wall boxes 41 upon which the wall at the side of theboiler is supported.

Tile 42 are supported upon the bulb plate 43 which is supported by the wall boxes 40 and plates 44 on the upper row of Bailey blocks 25 extend into a slot between the edges of the tile 42 and the plate 43 to form the slip joint. The lower sides 45 of the tile 42 are made sloping so that ash lib ber walls, means for burning fuel in suspension in said lower chamber, said lower chamber having a horizontally arranged floor of slag resistant material coacting with said lower chamber vertical walls to maintain a slag pool in said lower chamber, means forming a slag discharge opening from said lower chamber, each of said lower chamber walls comprising a row of laterally spaced vertical cooling fluid tubes extending substantially throughout the height of said walls and connected to a header at their lower endpmeans carried by said tubes for closing the inter-tube spaces, means for bottom supporting said lower chamber walls and preventing downward expansion thereof comprising a metallic supporting structure receiving the headers of said wall tubes, and means forming a gas sealing expansion joint between the lower end of said upper chamber walls and the upper end of corresponding lower chamber walls.

2. Fuel burning apparatus comprising vertical walls enclosing an upper fluid heating chamber and other vertical fluid cooled walls enclosing a lower furnace chamber and substantially in alignment with said upper chamber walls, said lower chamber walls being normally subjected in operation to high temperatures and arranged for substantial vertical expansion and contraction movements, means for supportingsaidupper chamber walls independently of said lower chamberwalls, means for burning fuel in suspension in said lower chamber, said lower chamber having a horizontally arranged floor of slag-resistant materialcoacting with said lower chamber vertical walls to maintain a slag pool in said lower chamber, means forming a slag discharge opening from said lower chamber, said lower chamber walls comprising a row of laterally spaced vertical cooling fluid tubes extending substantially throughout the height of said walls and connected to a header at their lower end, means carried by said tubes for closing the inter-tube spaces, means for bottom supporting said lower chamber walls and preventing downward expansion thereof and comprising a metallic supporting structure receiving the headers of said wall tubes and fixed lateral wall supports at the outer side of said lower walls and having a connection to said wall tubes permitting vertical expansion and contraction of said tubes, and means forming a gas sealing expansion joint between the lower end of said upper chamber walls and the upper end of corresponding lower chamber walls.

3. Fuel burning apparatus comprising vertical walls enclosing an upper fluid heating chamber and other vertical fluid cooled walls enclosing a lower furnace chamber and substantially inalignment with said upper chamber walls, said lower chamber walls being normally subjected inoperation to high temperatures and arranged for substantial vertical expansion and contraction movements, means for supporting said upper chamber walls independently of said lower chamber walls, means for burning fuel in suspension in said lower chamber, said lower chamber having a horizontally arranged floor of slag resistant material coacting with said lower chamber vertical walls to maintain a slag pool in said lower chamber, means forming a slag discharge opening from said lower chamber, said lower chamber walls comprising a row of laterally spaced verticalcooling fluid tubes extending substantially throughout the height of said walls and connected to substantially horizontal headers at their upper and lower ends, means carried by said tubes for closing the inter-tube spaces, each of said upper headers being arranged outside and each of said lower headers being arranged in the plane of said tubes, means for bottom supporting said lower chamber walls and preventing downward expansion thereof comprising a metallic supporting structure receiving the lower headers of said wall tubes, and means forming a gas sealing expansion joint between the lower end of said upper chamber walls and'the upper end of corresponding lower chamber walls.

THOMAS C. TOOMEY.