US1466879A - Furnace - Google Patents

Description

Sept. 4, 1 923.

l. HARTER FURNACE Filed Dec. 18, 1918 9, Sheets-Sheet 1 IN VEN TOR.

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Sept. 4, 1923. 1,466,879

I. HARTER FURNACE Filed Dec. 18. 1918 2 Sheets-Sheet 2 y I I INVENTOR.

Patented Sept, 4, 1923.

UNITED STATES 1,466,879 PATENT OFFICE.

ISAAC HABTERL, OF DONGAN HILLS, NEW YORK. ASSIGNOR TO THE BABCOCK & WILGOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

FURNACE.

Application filed December 18, 1918. Serial No. 267,227.

To all whom it may concern:

Be it known that I, ISAAC HARTER, a citizen of the United States, residing at Dongan Hills, in the county of Richmond and State 6 of New York, have invented a new and useful Improvement in Furnaces, of which the following is a specification.

My invention relates to a furnace for a steam boiler and more particularly to an inclined wall for a furnace, and it has for its object the improvement in a device of this character.

An inclined furnace wall is desirable under certain conditions, and particularly when the stoker extends well into the furnace, as does the furnace stoker which I have illustrated, such a construction increasing the volume of the combustion chamber thereby prolonging the period of combustion of the ases therein and promoting the efficiency 0 the furnace. In accordance with my invention, provision is made for the free expansion and contraction of the inclined wall, thereby avoiding injury to the same and to the parts associated therewith.

My invention will best be understood by reference to the accompanying drawings, in which Fig. 1 is a vertical section through a furnace and the parts associated therewith,

embodying my invention; Fig. 2 is a sectional view similar to Fig 1, but showing a modified form of the lower wall support and illustrating only the inclined wall and the parts directly associated therewith; Fig.

3 is an end elevation partially in section on the line X--X of Fig. 2; Fig. 4 is an inverted plan, partially in section, the view being taken along a horizontal plane passing through the openings of the inclined wall,

and Fi 5 is a rear view of the lower portion 0 the furnace. Similar reference characters indicate similar parts in the different views of the drawings.

Referring now to the drawings, 10 indicates a bank of inclined water tubes of a steam boiler of the Babcock & Wilcox type, connected at their ends to downtake headers 11 and uptake headers 12, respectively. As here shown, the lower row of tubes 13 is separated from the remainin tubes of the bank to form a space 13. Fertical baffles 14 and. 15 are provided for directing the gases over the boiler tubes in a plurality of passes, the upper front portion of the combustion space being closed by an inclined wall 19, thereby providin baffle 16 connecting the lower end of the baffle 14 and the top of the front wall 17 of the furnace, the side walls of the furnace being indicated by the character 17 (see Fig. 4). The stoker 18, which is set well into the furnace, is here shown as being of the underfeed type.

The rear art of the furnace comprises a furnace wal 19, which is here shown as substantially vertical, the same being supported by a framework comprising cross-beams 19 The operating floor 'of the furnace is indicated by the reference numeral 20. An inclined wall 21, which is indicated in general by the reference numeral 21, forms, at its upper end, at 22, a slidin joint with the or the free exansion and contraction o the inclined wall without injury thereto or to the associated parts. It will be apparent that a wall thus inclined will provide a combustion chamber having a larger volume than would one in which the rear wall extended vertically from the rear end of the stoker. The lower end of the wall 21 is supported on the stoker box 23, the upper wall of which box is provided with steps .24 arran ed at sub stantially right angles to the ace of the wall so that the courses 25 of the masonry or brickwork, which are also arranged at substantially right angles to the outer face of the inclined furnace wall, rest against the steps of the upper wall of the stoker box, as best shown in Figs. 1' and 2. This stepped arrangement of the stoker box overcomes any tendenc that the bottom of the inclined wall might ave to creep toward the stoker side of the furnace, due to the inclination of the wall and to the intermittent expansion and contraction thereof. The steps of the stoker box are air-cooled by means of air obtained from the forced blast system which is used in connection with the underfeed stokers. The dumping-bars 26 of the stoker are in part supported by the box 23. The masonry or brickwork of the inclined wall is laid against and supported by a frame work exterior to the wall and comprising end members 27, which extend l'ongitudinally of the inclined wall and which are connected by I-beams 28, which hold in position angle-irons 29 placed against the masonry or brickwork. The lower end of the inclined wall is provided with openings 30 whi m'd access to the stoker '18 and particularly to the dumping-bars thereof, the openings being closed by doors 31.

By providing the inclined wall with an opening adjacent to the dumping bars, it is possible for the operator to stand nearer the dumping bars in removing the clinker than would be the case if the upper vertical section of the wall against which the top of the inclined wall rests were extended downward to the floor line and the opening for access to the dumping bars placed in the vertical wall. The combination, therefore, serves to provide an efiicient arrangement for getting at the clinker where a stoker or other grate is set in a position with reference to the boiler similar to that shown in the drawings.

In Fig. 2 I have shown a slight modification of the wall support, which is intended for use in connection with the stoker boxes in common use at the present time, or as a wall support independent of a stoker box. I have indicated a box such as commonly used, by the reference numeral 32, above which is disposed a plurality of stepped plates 33, having flanges 34 extending downwardly behind the box to prevent forward creepage of the bottom of the wall 21. A stepped member continuous along the bottom of the wall may be used if desired. However, by providing a support consisting of a plurality of shorter members spaced at intervals beneath the wall, I avoid any disadvantage that may arise due to the expansion and contraction of an independent support made in one piece. The upper wall of the box 32 is perforated to admit air from the box 32 to the spaces between the upper wall of the box 32 and the plates 33 and thereby cool the latter.

It will be understood that this inclined wall is equally applicable in cases where no stoker air box is suppliedunder the wall. When the inclined wall is used independent of the stoker parts, the stepped plate or plates may be anchored to a concrete or other foundation and the inclined wall sup ported thereon. As a cooling means, air may be permitted to circulate through open ings in the side walls of the furnace and under the plates. Where no cooling means isrequired, the said member may, if it is desired, be made of a solid casting.

What I claim and desire to secure by Letters Patent of the United States is 1. In a furnace, a furnace wall, a second furnace wall inclined to the first and forming a sliding joint therewith, a support for said inclined wall, said inclined wall being provided with an opening independent of said support for affording access to the interior of the furnace. a

2. In a furnace, a furnace wall, a second furnace wall inclined to the first and forming a sliding joint therewith. a support for holding the bottom of the wall in fixed horizontal relation to said first'wall, said inclined wall being provided with an opening independent of said support for affording access to the interior-of the furnace.

3. In a furnace, a furnace wall, and a second furnace wall inclined to the first wall and resting at its upper end against the side of said first wall and having a sliding joint therewith.

4. In a furnace, a furnace wall, and a second furnace wall inclined to the first wall and resting at its upper end against said first wall and having a sliding joint therewith, and a member stepped transversely of said wall for supporting the lower end thereof, the bearing surfaces of said mem ber being substantially at right angles to the face of the wall.

, 5. In a furnace, a furnace wall, and a second furnace wall inclined to the first wall and resting at its upper end against said first wall and having a sliding joint therewith, and a member stepped transversely of said inclined wall for supporting the lower end thereof.

6. In afurnace, a substantially vertical furnace wall, and a second furnace wall inclined to the first wall and resting at its upper end against the vertical Wall and having a sliding joint with the side thereof, supporting means disposed beneath the lower end of the inclined wall and adapted to hold the said lower end of the inclined wall in fixed horizontal relation to the said vertical wall.

7. In a furnace, a furnace wall, a second furnace wall inclined to the first wall and resting at its upper end against said first wall and having a sliding joint therewith, and a supporting box beneath the lower end of .said inclined wall, the upper side of which is formed with steps transversely of said inclined wall on which the brickwork of the inclined wall has its bearing, said box being formed to admit air for cooling the same.

8. In a furnace, a furnace wall, a second furnace wall inclined to the first wall and resting at its upper end against said first wall and having a sliding joint therewith and a supporting box beneath the lower end of said inclined wall, the upper side of which is formed with steps transversely of said inclined wall on which the brickwork of the inclined wall has its bearing, said box being formed to admit air for cooling the same and constituting a support for the inclined wall.

9. In a furnace, a substantially vertical .furnace wall, a second wall inclined to the first wall and resting at its upper end against the side of the vertical wall and forming a sliding joint therewith, and a support for holding the bottom of the inclined wall in fixed horizontal relation to the vertical wall.

10. A foot support for an inclined wall comprising a metallic plate having a stepped upper surface on which the wall rests, the steps extending longitudinally of the wall and parallel to the face thereof, and means to anchor the support against horizontal movement under pressure of the wall.

11. A foot support for an inclined wall comprising a metallic plate having a stepped upper surface on which the wall rests, the steps extending longitudinally of the wall and parallel to the face thereof, the steps having air spaces beneath them wherein cooling air may be circulated. I

12. In combination, an operating floor, a furnace comprising a grate, a rear furnace wall supported sufficiently above said operating floor to afiord space beneath said wall for an operator, an inclined furnace wall supported at its upper end against said rear furnace wall and provided with an opening affording access to said grate.

13. In combination, an operating floor, a furnace comprising a grate having dumping bars at the rear of the furnace, a rear furnace wall supported sufficiently above said operating floor to afford space beneath said wall for an operator, an inclined furnace wall supported at its upper end against said rear furnace wall and provided with an gpening affording access to said dumping ars.

14. In combination, an operating floor, a furnace comprising a grate, a rear furnace wall supported suiiiciently above said operating floor to afford space beneath said wall for an operator, an inclined furnace wall havin its upper end slidingly seated against sai rear furnace wall and provided with an opening affording access to said grate.

15. In combination, a furnace, a grate for a boiler having dumping bars at the rear of said furnace, aninclined rear furnace wall, and a support therefor, said inclined wall having an opening therethrough independent of said support to afford access to said dumping bars, and a structure against which the upper end of said inclined wall is slidingly seated.

16. In combination, a furnace, a grate for a boiler having dumping bars at the rear of said furnace, an inclined rear furnace wall and a support therefor, said inclined wall having an opening therethrough independent of said support to afiord access to said dumping bars, and a rear furnace wall against which the upper end of said inclined wall is slidingly seated.

17. In a furnace, a rear furnace wall, a grate, an air-cooled supporting member located adjacent to said grate, and an inclined furnace wall seated directly on said supporting member and slidingly seated at its upper end against said rear furnace wall.

18. In a furnace, a furnace wall, a second furnace wall inclined to the first and forming a sliding joint therewith, a supporting framework for said inclined wall located at the rear thereof and itself inclined to the first mentioned wall, the courses of the masonry of the brick work of said inclined wall being arranged at substantiall right-angles to the face of the inclined wal 19. In a furnace, a furnace wall, a second furnace wall inclined to the first and forming a sliding joint therewith, a stepped base supporting member for the inclined wall, a supporting framework for the inclined wall located at the rear thereof and itself inclined to the first mentioned wall, the

courses of the masonry of the brick work.

of the inclined wall being arranged at substantially right-angles to the face of the inclined wall and the bricks of the wall being laid against the steps of said stepped member In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

ISAAC HARTER.

Witnesses:

F. A. CLEARY, A. N. Lows.

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