US1242447A - Superheater-boiler. - Google Patents

Description

W. A. JONES.

SUPERHEAT ER BOILER.

4 m 2, Q W 1 I Patented Oct. 9, 1917.

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APPLICATION FILED MAR-4.1914.

Patented 0st; 9,1917.

3 SHEETS-SHEET 2 UNITED STATES PATENT F WILLIAM JONES, OF WEST NEW BRIGHTON, NEW YORK, ASSIGNOR TO THE BABCOCK & WILOOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

QSUPERHEATER-YBOILER.

Specification of Letters Patent.

Patented. Oct. 9, 1917.

Application filed March 4, 1914. Serial No. 822,253.

T 0 all whom it may concern Be it known that I, WILLIAM A. JONES, a citizen of the United States, residing in VV-est New Brighton, Staten Island, county of Richmond, and State of New York, have invented certain new and useful Improvements in. Superbeaterdioildrs, of which the following is a specification.

My invention relates to superheater boilers and more particularly to a novel means for supporting the superheater, and comprises means for resisting the over-turning moment as well as the weight of a superheater having upwardly projecting tubes. In the particular embodiment illustrated the supports comprise saddlesin which the headers rest, and beams to which the saddles are secured, said beams'forming part ofthe frame work supporting the Boiler. The saddles and beams are protected by brick-work between them and the hot gases. A feature of the invention consists in the provision of means for securing the headers to the beams whereby Iam enabled to dispense with the cross pipe heretofore used to resist the over-turning moment of the superheater tubes. This and other features of the invention will be understood by reference to the accompanying drawings in which Figure 1 is a vertical section of a portion of the boiler, certain parts being in side elevation; Fig. 2 a front elevation of one of the superheater headers with its support: Fig. 3 a view, partly in elevation, showing the support for one end of the superheater headers in a battery of boilers; Fig. 4 a transverse section of a header and collar therefor to prevent excessive longitudinal movement of the header; Fig. 5 a view of the outside framework of the boiler setting, either single or battery; Fig. 6 a view of the center supporting framework for a battery of boilers; Fig. 7 a detailed view hereafter referred to; and Fig. 8 a longitudinal vertical section showing my invention applied to a vertical boiler having a form of battles preferred for some furnaces and fuels.

In the drawings, referring to the form of Figs. 1 and 6 inclusive, in which the inven-' tion is shown in connection with a Stirling boiler, the numerals 1, 2, and 3-represent the upper transverse steam and water drums which drums are connected by front, middle and rear banks of generating tubes with a the generating tubes. The upper drums are interconnected by steam and water circulators, one arrangement of which 13 shown in Fig. 8. In Fig.1 I have shown a portion of the front bank of tubes 5, and a part of the middle bank of tubes 6." Back of the front bank is a baffle 7 which directs the gases along the tubes 5 and across the upper portion thereof to the second or middle bank. In this instance the superheater is placed in the second pass, that is, in the space between the first and second banks of tubes, so as to be exposed to the hot gases after they sweep across the upper portion of the first bank, obtaining thereby a high degree of superheat. In the present design I have shown the superheater as of the inverted U-tube type consisting of headers 8 and 9 which extend acrossthesetting and through the side walls 10. Into the headersare expanded the ends of the superheater tubes 11, the loops thus projecting upwardly in the I tubes, t e bend being in proximity to the middle drum 2. One'of the headers will be connected'with the boiler steam pipe and eneral direction of the generating the other with the service pipe in the usual way.

The ends of the headers, as shown inFig. 2, extend through the side walls of the setting and rest in saddles 12, and the latter are secured to beams which are part of the As shown, the supports for the headers, including the beams, saddles'and straps, are protected from contact with the flame and gases; that is, they are beyond the inner surface of the side walls and embedded in the walls. In the case'of a single boiler the saddles 12 and cross beams 13 at each end of the headers are preferably embedded in the outer part of the side walls. In a battery of boilers, however, the inner ends of the headers pass into the intermediate wall 16, shown in Fig. 3, and such ends rest upon a common saddle 17 supported upon a cross beam 18, the latter being supported at its ends by one of the front uprights 14. and intermediate upright 14 of the framework. To prevent excessive longitudinal movement of the headers I secure to the inner ends thereof, in a battery of boilers, as shown in Fig. 3, a split collar 19 which, should there be longitudinalmovement of the headers, will strike against the sides of saddle 17. The cross beams 13 and 18 are a part of the structural framework which supports the boiler.

In Fig. 8, I show the invention applied to a Stirling boiler havinga form of bathing preferred for some furnaces and fuels. The 'front baffle 20 extends upwardly from the lower drum 4: in front of the rear tubes of the front bank and preferably between the first and second rows of these tubes. The next baffle 21 extends downwardly from the upper middle drum 2 within the middle bank and preferably between the first and second rows thereof. The third baffle 29 extends upwardly along f the back of the middle bank from the lower drum, and the rear baffle 23 extends downwardly from the rear upper drum 3 toward the drum. In this case the flame and gases rise through the unobstructed furnace space between the front wall of the setting and the front baffle, and cross over among the upper parts of the tubes of the front bank into the second ary combustion chamber formed between this bank and the next bank of tubes. In this space the. inverted U-tube superheater is set; this being supported the same as in the first form. The gases then flow downwardly'over the rear tubes of the front bank 5 and the front row of tubes of the second bank, rise among the remaining tubes of the middle bank 6, and thence pass down among the tubes of the rear bank and rise to the ofi'take flue.

In this case my method of supporting the superheater is especially valuable inasmuch as the temperature of the gases in the secondmeager 'ary combustion chamber is higherthan with to burning of the supporting cross pipe for the superheater tubes, as heretofore used.

From the foregoing description it will be seen that I have done away with the cross pipe in front of the superheater heretofore used to support the tubes, and have provided a support for the headers and tubes which not only takes the weight of the superheater, but one which resists the over-turning moment. The cross pipe heretofore used to resist the overturning moment was liable to burn out especially where the front battle was in front of the rear tubes of the first bank, as shown in Fig. '8, and wherethe gases strike only a portion of the tubes of the first bank during their first upward flow, such burning out'of the cross tube causing serious inconvenience and trouble.

It will also be seen that the supports are independent of the brick-work and have superheater headers between the upper and lower boiler drums and provided with upwardly projecting tubes,'bean1s in the side walls extending underneath said headers, each beam having a plurality of saddles having seats at different levels to receive the superheater headers, and means for securing the headers to the saddles, the beams and saddles being protected from the flame and gases.

2. A superheater boiler having transverse superheater headers between the upper and lower boiler drums and providedavith upwardlyprojecting tubes, beams in the side walls extending underneath said headers, each'beam having a plurality of saddles having seats at different levels to receive the superheater headers, and straps for securing the headers to the saddles, the saddles and straps being protected from the flame and gases.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

\YIIJLI&\M A. .IONESI Witnesses:

M. E. MoNrNoII, Crrannns A. Jonas.

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