US1920740A - Steam boiler - Google Patents

Description

Aug. 1, 1933. J 5 BLACK 1,920,740

STEAM BOILER Original Filed April 19, 1927 2 Sheets-Sheet l Figuk INVENTOR- BY W F 456 ATTORNEYS g- 1, 1933- v J. E. BLACK 1,920,740

STEAM BOILER Original Filed April 19, 1927 2 SheetsSheet 2 Fig.

W INVENTOR BY My TT0RNEY$ drum 11 connected by banks of tubes Patente Aug. ll

- elon ate My present invention relates to steam boilers, and particularly to improvements connected with the furnaces and settings thereof, and will be best understood from the following description 6 and the annexed drawings, in which l is vertical sectional elevation, with parts broken away, of an illustrative embodiment of my ih= vention as applied to a boiler of the Stirling type; Fig. 2 is an enlarged view of a portion of m Fig. 1 and also a section on line 2--2 of 3; Fig. 3 is a view of 2 taken along the line 3-3, and Fig. 4 is a section on the line i e of 8. 3.

Like reference characters indicate like parts 15 in the several views.

In the illustrative embodiment, a boiler of the Stirling type has upper steam and drums 10 (two only of which are shown but 0 which there may be three or more) and a lo rater 2 2 ..d pro vided with baliling in the usual manner pro vide a series of longitudinal passes of the gases from the furnace 13 over water. tubes.

In the form illustrated, the

by a chain grate stoker is in bank of tubes 12 and the l of any suitable refractory or the l unds from the wall 16 over the rear end of the sto ger 14. This arch is water cooled by tubes it which support the arch, these tubes being con nected to a header is and suspended from it beams 19 forming part the boiler The other ends of the tubes 17 connected to a header or box at carried on re sloping face of a support 20 on the outside of the wall.

16, thus permitting the headers iii and 2b move when the tubes 17 expand and contract. The downcomer tubes 21 connect the 2t with the drum 11 and the pipe 22 connects the header 18 with the steam space oi one of the upper steam and water drums 10. By the arrangement of piping described, it will be evident will flow from the drum 11 tnroughtubes 21 to the box 20 and from thence through the tubes 17, the header 18 and the pipe 22 to the upper steam and water drum,- thus providing a w ,ter I circulation through the cooling tubes it. The arch carried on the tubes 17 may be formed in any desired manner, as, for instance, by means of blocks fastened to the tubes.

The header 18 is positioned adjacent to but not in contact with the drum 1i, and, ordinarily, a butt strap 1i on the drum 11 will come a 55 point adjacent the furnace 13. it is desirable to protect the drum 11 from the excessive effect ozi 3. designer, by mesne sign @onipeny, a Cor- "ll 19, rear, Serial No. 184,852 11, 193i WNW) REISSUED the radiant heat of the furnace, and this is true particularly if a butt strap is subjected to this heat.

in order to protect the drum, I provide a short wall extending up from the arch 15 to a point in front of the water drum 11, this wall having most of its weight carried on the arch 15. The wall itself is made up of tile 23 provided with recesses, as shown best in Fig. 4, which engage bulb portions 24 of backing plates 25, these backing plates being connected to gusset plates 26 fastened to the header 18.

It will be understood that the header 18 will have a relatively fixed position because of its support on the I-beams 19 and that, on the other the relative movement between the drum and the arch i5 and therefore the wall 23, but also because of the vertical expansion of the backing plates 25.

To this end, I provide a hook-like portion 2'? on the upper part of the backing plates 25 with the lower face of this hook-like portion 27 extending in a direction which is substantially parallel to the direction of motion of the drum 11 when it is moved by the changing heat conditions in the boiler and its setting. This hook-like portion may also be referred to as a joint member co-opwith a complementary joint member which comprises the angularly related parts 28 and 29. On the drum 11 I provide an angle memer 28 having a hook portion 29 with its upper surface parallel to the lower surface of the hookliize portion 27. Consequently these two surfaces can be brought closely together and will permit relative motion between the wall 23 and the drum ll, it being understood, of course, that it is not essential for any purpose that the joint between these two hook portions shall be completely closed.

In practice, preferably I fill the space above the hooks 27 and 28 with a plastic heat resisting material, and cover this with a tile 23 resting on the top of the vertical wall.

As a further seal between the drum 11 and the arch 15, I preferably provide a flexible seal extending from the drum 11 to the header 18, this seal comprising hooked plates 30 with their hooks resting in a hook member 31 attached to the drum 11.

it will be understood that in the form of boiler no illustrated, the negative pressure in the last pass adjacent the rear setting wall 32 is relatively greater as compared with the negative pressure in the furnace chamber 13 and that, if there was any direct path beneath the drum 11 from the furnace chamber 13 to this low pressure pass, hot gases would be drawn through any cracks in the seals between the arch l5 and the drum 11 and this would tend to destroy the metallic members comprising such seals. To avoid this, I expose a portion of the drum 11 to the atmospheric pressure of the boiler room and, in the arrangement illustrated, this is done by extending a floor 33 from the rear wall 32 to a point adjacent the lower part of' the drum l1, and sealing the space between the end of this floor and the drum 11 by hooked sealing members 34 engaging hook members 35 attached to the drum 11. The inner end of the floor 33 is supported by the I-beam 19 The space on the drum 11 between the members 31 and 35 is exposed to atmosphere through the openings between the I- beams 19 and 19. The wall 16 terminates short of the floor 33 and the wall 32 is carried on I-beams 36 so that there is a space between the lower part of this wall and the boiler room floor. It will be understood that the tubes 21 are relatively widely spaced.

With the arrangement just described, it is evident that any leakage through the tile 23 and the metal work connected to them would be from the atmosphere inward, so that the possibility of suction drawing hot gases through this tile is obviated. In other words, by the arrangement described, the seal between the vertical wall and the drum 11 and the seal between the drum l1 and the header 18 and the floor 33 can be relatively incomplete without destroying the seals themselves. Furthermore, in the arrangement described, access to the header 18 may be readily had from the exterior of the setting for purposes of cleaning the tubes 1'7 and the like.

It will be understood that the arrangements which I have shown are merely illustrative and that the embodiment of v my invention may be widely varied. It will also be understood that certain features of my invention may be used without other features thereof.

I claim:

1. A water tube boiler of the Stirling type having an arch below and in front of the lower drum of the boiler, cooling tubes to support said arch, a wall supported upon and extending upwardly from said arch to a point in front of said lower drum, backing plates for said wall having vertical bulb portions on the front thereof, said wall comprising tile and said bulbs engaging recesses in said tile, whereby the tile are permitted free expansion in a generally vertical direction and an angle member connected to said lower drum, said backing plates having hooks cooperating with said angle member to form a gas seal and the plates being substantially in contact with each other to form a continuous backing for the tile.

2. A water tube boiler of the Stirling type having an arch below and in front of the lower drum of the boiler, cooling tubes to support said arch, a wall supported on said arch and extending to a point in front of said lower drum, backing plates for said wall having vertical bulb portions on the front thereof, said wall comprising tile and said bulbs engaging recesses in said tile, whereby the tile are permitted free expansion in a generally vertical direction, a member connected to said lower drum and having an upper surface thereof extending substantially parallel to the motion of the lower drum produced by the expansion of the boiler water tubes connecting it with the upper boiler drums, and said backing plates having hook-like portions extending over said member with a lower surface thereof above and substantially parallel to said upper surface of said member and the plates being substantially in contact with each other to form a continuous backing for the tile.

3. A water tube boiler of the Stirling type in which the lower drum is suspended from the upper drums with a portion of said lower drum exposed to the atmosphere outside the boiler setting, an arch below said drum and in front of said drum, with one end thereof adjacent one side of said exposed portion, a floor extending from the rear setting wall to a point adjacent the other side of said exposed portion, and flexible gas seals connected to the lower drum at each side of said exposed portion and extending respectively to the adjacent end of said arch and the adjacent end of said floor.

4. A water tube boiler of the Stirling type in which the lower drum is suspended from the upper drums with a portion of said lower drum exposed to the atmosphere outside the boiler setting, a portion of the boiler setting forming the rear of the boiler furnace and terminating adjacent one side of said exposed portion, a second portion of the boiler setting defining a portion of the last gas pass of the boiler and terminating adjacent the other side of said exposed portion, and a flexible gas seal between the drum and the adjacent end of each of said portions of the setting.

5. A water tube boiler of the Stirling type having a wall below and in front of the lower drum of the boiler, said wall comprising cooling tubes having wall blocks carried thereby, a header to which the upper ends of said tubes are connected, a second wall extending upwardly from said first wall to a point in front of said lower drum, said second wall comprising plates forming a substantially continuous backing and having vertical bulb portions on the front thereof, tile slidably mounted on said bulbs, said tile resting upon the blocks on said tubes, and means forming a flexible gas seal between said backing plates and said drum.

6. A water tube boiler comprising a lower water chamber, a wall below and in front of said water chamber, said wall comprising cooling tubes having wall blocks carried thereby, a header to which the upper ends of said tubes are connected, a second wall extending upwardly from said first wall to a point in front of'said lower water chamber, said second wall comprising plates forming a substantially continuous backing and having vertical bulb portions on the front thereof, tile slidably mounted on said bulb portion, said tile resting upon the blocks on said tubes, and means forming a flexible gas seal between said backing plates and said water chamber.

7. A water tube boiler comprising, in combination, a boiler fluid chamber, a boiler furnace, a refractory wall constituting a part of the fumaoe and terminating at a position adjacent the chamber, means for separately supporting the chamber and the wall, a joint member flxed relative to the wall and extending in the direction of relative movements of the wall and chamber, a joint .member fixed relative to the chamber so as to have a part overlapping the first joint member and extending in a like direction, heat resisting material deposited between said joint members to fill the space therebetween during the above mentioned relative movements to constantly provide a gas seal, and a heat resisting cover positioned over said material.

8. A water tube boiler comprising, in combination, a boiler fluid chamber, a boiler furnace, a refractory wall constituting a part of the furnace and terminating at a position adjacent the chamber, means for separately supporting the chamber and the wall, a joint member fixed relative to the wall and extending in the direction of relative movements of the wall and chamber, a joint member fixed relative to the chamber so as to have a part overlapping the first joint member and extending in a like direction, and heat resisting material deposited over said joint members to constantly provide a gas seal, the members being so arranged that stresses occurring in the wall or the chamber may not be transmitted to the other of those structures.

9. A Water tube boiler comprising, in combination, a boiler fluid chamber, a boiler furnace, a refractory wall constituting a part of the furnace, and terminating at a position adjacent the chamber, means for separately supporting the chamber and the wall, a joint member fixed relative to the wall'and extending in the direction of relative movements, and a second joint member fixed relative to the chamber so as to have a part overlapping the first joint member, one of said joint members having two upwardly directed and horizontally spaced parts between which a part of the other joint member moves in response to the relative movements caused by expansion and contraction.

10. A water tube boiler comprising, in com bination, a boiler fluid chamber, a boiler furnace, a refractory faced water wall constituting a part of the furnace and terminating at a position adjacent the chamber, a water-wall header, tubes in communication with the header and constituting a part of the wall, means for separately supporting the'chamber and the wall, a joint member fixed relative to the wall and having a part extending in the direction of relative movements, and a second joint member fixed relative to the chamber so as to have a part overlapping the first joint .member and extending in a like direction, one of said joint members having two spaced parts between which a part of the other joint member moves in response to the relative movements caused by expansion and contraction.

11. In a water tube steam boiler and its furnace; a water chamber constituting a part of the boiler;-a furnace wall at one side of the water chamber, and an intermediate structure having upwardly extending overlapping metallic parts connecting the water chamber and said walls to constantly maintain a gas tight enclosure during boiler and furnace temperature changes; said intermediate structure including fibrous heat resisting material above the overlapping parts between which there is relative movement to compensate for said changes.

12. In a water tube steam boiler and its furnace; a water chamber constituting a part of the boiler; a furnace wall at one side of the water chamber, and an intermediate structure having upwardly extending overlapping metallic parts connecting the water chamber and said walls to constantly maintain a gas tight enclosure during boiler and furnace temperature changes; said intermediate structure including fibrous heat resisting material above said parts, and a cover plate of ceramic heat resisting material above the fibrous material; relative movements taking place between said parts to compensate for said changes in the maintenance of the gas tight enclosure.

13. In a fluid heat exchange device, a chamber containing a fluid to be heated, a furnace, a furnace wall positioned adjacent the chamber and including heat resistant tile, backing means forming tile aligners, interengaging means on the tile and the aligners for holding the tile, a furnace gas sealing means joining the aligners and the chamber, said sealing means including members movable relative to each other and having portions arranged in sealing relation to each other, whereby relative movement of said last named members is permitted without disrupting the seal.

14. In a boiler and furnaceorganization, a water chamber, a tile furnace wall adjacent the chamber, said wall including bulb members on which the tiles of the wall are strung, a gas seal structure joining the wall and the chamber, said seal structure including relatively movable members having portions arranged in sealing relation to each other, whereby relative movement of said last named members is permitted without disrupting the seal.

15. A water tube boiler comprising a lower water chamber, a furnace wall below and in front of said'water chamber, said wall comprising cooling tubes, means on the tubes for bridging the inter-tube spaces, a header to which the upper ends of said tubes are connected, a second wall extending upwardly from said first wall to a point in front of said lower water chamber, said second wall comprising members having vertical bulb portions on the front thereof, tile slidably mounted on said bulb portions, said tile resting upon said bridging means on said tubes, and relatively movable parts forming a flexible gas seal between said members and said water chamber, said parts having portions thereof arranged in sealing relation to each other, thereby permitting relativemovements between the chamber and said members without disrupting their operative relationship.

JOHN E. BLACK.

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