US1741718A

US1741718A - Furnace wall and baffle

Info

Publication number: US1741718A
Application number: US71517A
Authority: US
Inventors: David S Jacobus
Original assignee: Babcock and Wilcox Co
Current assignee: Babcock and Wilcox Co
Priority date: 1925-11-27
Filing date: 1925-11-27
Publication date: 1929-12-31
Anticipated expiration: 1946-12-31

Description

Dec. 31, 1929.

D. S. JACOBUS FURNACE WALL AND BAFFLE Filed NOV. 27, 1925 2 Sheets-Sheet l mm l huv u\lu n wllllllll W ATTORNEYS H Dec. 31, 1929. s, JACOBU 5 1,741,718

FURNACE WALL AND BAFFLE Filed Nov. 27, 1925 2 Sheets-Sheet 2 INVENTOR W /ATTORNEY Patented Dec. 31, 1929 I UNITED STATES PATENT OFFICE DAVID S. JACOBUS, OF MON TCLAIR, NEW JERSEY, ASSIGNOR TO THE BABCOCK 8t WIL- COX COMPANY, OF BA YONNE, NEW JERSEY, A CORPORATION NEW JERSEY FURNACE WALL AND RAFFLE Application filed November This invention relates to tile for making bafiles especially useful in connection with water tube boilers, and will be understood from the description in connection with'the accompanying drawings, in which Fig. 1 is a side elevation illustrating an embodiment of the invention; Fig. 2 is a section along the line 22 of Fig. 1; Fig. 3 is a plan view of the same; Fig. 4 is a plan view of a modification; Fig. 5 is a section along the line 55 of Fig. 4; Fig. 6 is a section through a boiler on a small scale, showing how the bafiles may be located; Fig. 7 is a plan view of a second modification; Fi 8 is a side elevation of the same; Fig. 9 1s a sectional view on an enlarged scale showing one of the tile and Fig. 10 is a perspective view of a tile.

In the drawings reference character 10 indicates water tubes of a water tube boiler between which the tile may be installed for the purpose of providing a bafile for the hot gases. A tile made in accordance with my invention is illustrated at 11, and consists of a block having opposite'sides parallel, and its front and rear faces in the shape of a parallelogram with obtuse angles. Its ends are hollowed out or made concave, so that they will fit the outside surfaces of the tubes 10 between which they are installed. In installing the same, as shown in Fig. 1, the bot: tom tile 11' is made with a surface that will adapt it to fit fiat against the header 15, and each one of the successive tile are installed thereabove by introducing the same while held in a vertical position between the tubes, and then turning the same anticlockwise, as seen in Fig.1, until the rounded ends come into contact with the tubes. after which it is permitted to slide downwardly into contact with a' lower tile, and the tubes hold the same in place. One of the rounded end portions of the bottom tile 11' is curved at 11 to enable it to be turned into place. The angle of slope of the top and bottom edge surfaces of the tile 11 with respect to the rounded ends thereof is such that the point 12 where the top edge of one of the rounded ends contacts with one of the tubes, and the point 13 where the lower edge of the other rounded end contacts with theother tube 27, 1925. Serial No. 71,517.

will be substantially horizontal so that the polnt 12 will serve as a pivot around which the tile 11 can be swung upwardly to remove the same. The tile when in place between the tubes fit the'tubes closely from top to bottom on each side. lVhen the usual form of t1le with horizontal joints is used it is impossible to form the tile so that they will fit n the desired manner against the tubes from top to bottom because after turning the t1le into place there will be a line contact lnstead of a contact of a considerable portion of the entire surface at each side of the tile. It can therefore be seen that by making the oints which come at the top and bottom of the tile at an angle with the horizontal a tile may be used which will contact with the tubes from top to bottom and thereby provide a much better "thermal contact with the tubes and a tighter joint to prevent gas leakage than can be obtained with a tile having horizontal joints. It will thus be seen that the tile can be readily installed and removed, and will be securely retained in pos1t1on by the tubes 10 when they are in place to form with the tubes a bafile. It will be understood that other tile will be similarly installed in the spaces between rows of tubes to form a battle of the desired width, and a sufficient number of tile will be installed to make the baflle the desired length.

In the modification shown in Figs. 4 and 5, the middle portion of the tile 16 is made narrower, thus making the tile less bulky wh le still retaining the advantages of ease of nstallation and removal, and security of p os1t1on when installed. In this modification, tile are shown with grooves 17 along their top surfaces and corresponding ribs 18 along their lower surfaces, as most clearly shown in Fig. 5, so that the danger of escape of radiant heat or gases between the tile is obviated.

.The tile may be installed, for example, between rows of tubes as shown in Fig. 6, in which 17 and 18 indicate the steam and water drums of a boiler of the Stirling type connected by banks of tubes with the mud drum 19, the tile being installed between rows of such tubes to provide bafiies which will cause arrows in this figure.

- 'agamst one of the tubes,

In the modification shown in Figs. 7 to 10, a tile 20 is illustrated, having trapezoidal shaped front and rear edge surfaces with rounded-

sides

21 and 22 to fit the tubes. The

top and bottom faces are made converging, and the portion 23 of the short rounded side 22 is cut away on the arc of a circle, whose center is the same as the center of the rounded portion 21. The planes of the top and bottom faces are perpendicular to the front and rear sides.

The tile 20 are installed between the tubes 10 by merely placing the rounded side 21 as shown in dotted lines in Fig. 9, and then turning the same to the full line position, thus slidin the rounded concave surface 21 of the ti e circumferentially around the outside surface on the tube 10 with which it contacts, until the rounded side 22 comes into contact with the other tube 10, the portion 23 being cut away to permit this. The next tile is installed with its long rounded side against the other tube 10. These tile 20 are thus installed between tubes 10, so that their front and rear faces or sides are substantially parallel to a plane passing through the axes of the tubes. A tile can be taken out by merely pressing upon the rear face thereof, preferably near the line 24, as this will cause the tile to revolve from the full line to the dotted line position, shown in Fig. 9, after which it can e readily removed.

It will be noticed from Fig. 8 that the tile.

20 are installed between the tubes 10 in such a manner that the long sides 21 of tile in a vertical row alternate with the short sides 22 of successive tile, or, successive triangularly shaped tile in a vertical row point in opposite directions An appreciable amount of force is necessary to turn a tile 20 for removing the same after it has been placed in position, so that there is no danger of gas pressure forcing it out of place. The reason for this is because in order for atile to turn around its tube 10, it must follow a spiral path upwardly and lift the tile above it in order to be moved from its normal wallforming position when in place. Ihis will be understood by observing that the long edges 25 of each tile are longer than the line along the curved surface 21, parallel to the edges 25 and half Way between them, so that,

to cause it to turn back spirally downwardly to its wall-forming position. At the same time, when the tile is being forced out of its position in the wall, the corner 27 will, by riding along the downwardly sloping surface or end of the next tile above, cause all of the superposed tile in the row to be raised upwardly a short distance. The ordinary draft pressure in a furnace-is not suflicient to displace the tile. Besides, the tile are preferably installed so that the draft pressure is against. the side that will tend to keep the tile in place, rather than against the other side.

I claim:

1. A baffle comprising two adjacent tubes substantially parallel to each other and a plurality of blocks disposed between said tubes,each of said blocks having oppositely disposed cylindrical surfaces adapted to engage said tubes, oppositely disposed faces extending between said cylindrical surfaces and forming parts of the opposite faces of the bafiie, and two edge surfaces extending between said cylindrical surfaces and adapted to contact with corresponding edge surfaces on adjacent blocks in the baffle, each of said two edge surfaces forming an acute angle with one of said cylindrical surfaces and an obtuse angle with the other.

2. A baflle comprising two adjacent tubes substantially parallel to each other and a plurality of blocks disposed between said tubes, each of said blocks having oppositely disposed cylindrical surfaces adapted to engage said tubes, oppositely disposed faces extending between said cylindrical surfaces and forming parts of the opposite faces of the baflie, and two ed tween said cylindrical surfaces and adapted to contact with correspondin edge surfaces on adjacent blocks in the ba e, each of said two edge surfaces forming an acute angle with one of said cylindrical surfaces and an obtuse angle with the other, a portion of one disposed cylindrical surfaces adapted to en gage said tubes, oppositely disposed faces extending between said cylindrical surfaces and forming parts of the opposite faces of the baflie, each of said faces being in the form substantially of a quadrilateral with two acute angles and two obtuse angles, and two edge surfaces extending between said cylindrical surfaces and adapted to contact with corresponding edge surfaces on adjacent blocks.

4. A baffle comprising two adjacent tubes substantially parallel to each other and a plurality of blocks disposed between said tubes, each of said blocks having oppositely disposed cylindrical surfaces adapted to engage said tubes, oppositely disposed faces extending between said cylindrical surfaces and forming parts of the oppositefaces of the baflie, each of said faces being in the form substantially of a trapezoid, and two edge surfaces extending between said cylindrical surfaces and adapted to contact with corresponding edge surfaces on adjacent blocks.

'5. A baflle comprising two adjacenttubes substantially parallel to each other and a plurality of blocks disposed between said tubes, each of said blocks having oppositely disposed cylindrical surfaces adapted to engage said tubes, oppositely disposed faces extending between said cylindrical surfaces and forming parts of the opposite faces of the bafiie, each of said faces being in the form substantially of a trapezoid, and two edge surfaces extending between said cylindrical surfaces and adapted to contact with corresponding edge surfaces on adjacent blocks, a portion of one of said cylindrical surfaces being cut away to permit removal of the block transversely of the tubes.

DAVID S. JACOBUS.