US1774749A - Steam boiler - Google Patents

Description

D. s. JACOBUS LTM 'MQ STEAM BOILER Filed July 28, 1926 Fig-Z 3 Sheets-Sheet 1 INVENTOR ATTORNEYS Sw 2,, mm. D. s. JACOBUS fimfi ii S TEAM BOILER Filed July 28', 1926 3 Sheets-Sheet 2 Fig Fig Fig-4 0 0 o o o o%@ o 0 o O 5/... 0 0 0 0 0 2 0 0 0 0 o O o 'o{ 0 0 O O /4 0 o 0 0 0 0 jfigo O o o o o o O O o o o o 0 0 0 0 O 121 0 0 0 0 0 O 0 0 0 9 0 0 g .0 0 0 0 0 O0 0 o o o o 5309 INVENTOR BY jade ATTORNEYS Sept. 2, 1930. D. s. JACOBUS STEAM BOILER Filed Jul 28, 1926 5 Sheets-Sheet s ATTORN EY Patented Sept. 2, 1930 UNITED STATES PATENT OFFICE DAVID S. JACOBUS, F MON'I'CLAIB, NEW JERSEY, ASSIGNOR TO THE BA'BCOOK & WIL- COX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY STEAM BOILER Application filed July 28,

This invention relates to water tube steam boilers, particularly of the Stirling type, in which gases flow acrossthe tubes, and will be understood from the description in connection with the accompanying drawings, in which Fig. 1 is a vertical section through a boilerillustrating the invention; Fig. 2 is a section along the line 22 of Fig. 1; Fig. 3 is a section along the line 33 of Fig. 1;

Fig. 4 is a section along'the line 4-4 of Fig. 1; Fig. 5 is a front elevation taken along the line 55 of Fi 3; Fig. 6 is a section along the line 6-6 0 Fig. 5, and Fig. 7 is a view corresponding to Fig. 1, but showing the in- 16 vention as used in'a type of furnace without an arch.

In the drawings, reference character 10 indicates a furnace that may be heated, for example, by means of fuel that is introduced through the burners 11. The lower or mud drum of the boiler is shown at 12, provided with the usual drain or blow-off pipe 13. Banks of tubes 14, 15 and 16 connect the drum 12 to the upper drums 17, 18 and 19,

and the upper drums ma be connected to each other by circulating tu es 20, in the usual manner.

As will be seen by referring to Fig. 4 of the drawings, the tubes of any row in the bank 39 14 are arranged in pairs, with the spaces between some of the tubes in a row somewhat greater than the spaces between other tubes of the same row in order to provide ample spaces through which tubes can be replaced.

Three baflles 21, 22 and 23 are disposed entirely across the boiler behind rows of tubes in the bank 14. The tubes in the bank 14 are arranged in rows and the tubes in successive rows are located directly behind each other. Each of the baifies 21, 22 and 23 is made insections with spaces between the sections, the several sections each bridging a space between adjacent tubes, and the spaces between the sections being at least as wide as the spaces between tubes. The sections of 1926. Serial No. 125,354.

the several baflles are arranged so that the spaces 1n one bathe are located behind the sections of the baffle in front of it, so that the hot products of combustion passing through the spaces of the several baflles will follow sinuous paths' across the bank 14 of tubes.

The tubes in the banks 15 and 16 are arranged in rows with the tubes in successive rows staggered with respect to each other. A baflle 25 is located on the front side of the first row of tubes in the bank 15. This bafllc is made up of a number of plate sec tions that are connected to the tubes 15 by means of the U-shaped straps 26, which pass around certain of the tubes and are bolted to adjacent edges of the sections that make up the baflle. The bafile is provided with openings 27. These openings are preferably elongated in the direction of the tubes, and are arranged in vertical rows, the rows of openings being aligned with the sides of the front row of tubes, as most clearly shown in F i 5, and the openings of successive rows bemg staggered with respect to each other.

A pipe 30 extends from the steam space of the middle drum 18to the inlet header 31 of a superheater that is located between the banks 14 and 15 of tubes. U-tubes 32 e011- nect the inlet header 31 to the outlet header 7 33 of the superheater, which outlet header is connected to the steam main, in the usual way. A baffle 34 is located between the banks of tubes 14 and 15, as shown in Fig. 1, to prevent the headers 31 and 33 of the superheater from being impinged directly by the hot gases.

It will be seen that the hot gases from the furnace 1O cross the several banks of tubes in a single pass, being caused to go in sinuous paths across the tubes in the bank 14 because of the openings through the baffles 21, 22 and 23, and being caused to be practically uniformly distributed across the first row of tubes in the bank 15 by means of the openings 90 27 in the bafiie 25, and as the tubes in the banks 15 and 16 are staggered, the gases are prevented from channeling or forming lanes between the tubes, the gases finally passing out through the outlet 84. The baffles 21, 22 and 23 are shown as terminating somewhat shortof the drum 17, but may be extended entirely to this drum, if desired. Also, the bafile 25 may terminate short of either the upper or lower drum, if desired, and other changes and modifications may be made without departing from the invention.

In Fig. 7, the invention is shown as used with a furnaee'which does not employ an arch, thus leaving a large combustion space directly in front of the front bank of tubes. This form I find to be preferable to use.

By the arrangement of the tubes and bafiles as above described, there is a staggered flow of gas throughout the several banks and the tubes in the bank contacted by the hottest gases are arranged in such a manner that replacement of tubes is facilitated.

I claim:

1. In a water tube steam boiler, upper and lower water chambers, a plurality of banks of water tubes connecting said chambers, a furnace in front of the front bank of tubes, an outlet for spent gases at the rear of the rear bank of tubes, a plurality of baffles in the front bank of tubes, with openings in successive bafiies staggered relatively to each other, and a bafile on the front side of the next bank of tubes, said last-named baflie having staggered openings therethrough.

2. In a water tube steam boiler, upper and lower water chambers, a plurality of banks of water tubes connecting said chambers, a furnace in front of the front bank oftubes,an outlet for spent gases at the rear of the rear bank of tubes, a plurality of baillcs in the front bank of tubes, with openings in successive baflles staggered relatively to each other, and a baflie on the front side of the next bank of tubes, said last-named bafile having staggered openings therethrough, the tubes in said bank also being staggered.

3. In a water tube steam boiler, upper and lower water chambers, a plurality of banks of water tubes connecting said chambers, a furnace in front of the front bank of tubes, an outlet for spent gases at the rear of the rear bank of tubes, a plurality of battles in the front bank of tubes, with openings in successive bafiles staggered relatively to each other, and a baflle on the front side of the next bank of tubes, said last-named baffle having staggered openings therethrough, the tubes in said bank also being staggered, the openings in adjacent vertical rows of openings in said baffle being in line with the sides of adjacent tubes in said bank of tubes.

4:. In a water tube steam boiler, a plurality of upper chambers, a lower water chamber, a plurality of banks of water tubes each connecting one of said upper chambers to the lower chamber, a furnace in front of the front bank of tubes, an outlet for spent gases at the rear of the rear bank of tubes, a plurality of bafiies in the front bank of tubes, with openings in successive baffles staggered relatively to each other, and staggered tubes in the other banks of tubes.

5. In a water tube steam boiler, upper and lower water chambers, a plurality of banks of water tubes connecting said chambers, a furnace in front of the front bank of tubes, an outlet for spent gases at the rear of the rear bank of tubes, a plurality of baflies in the front bank of tubes, with openings in successive baffles staggered relatively to each other, staggered tubes in the other banks of tubes, and a bafile wit-h staggered openings therethrough in front of one of said staggered banks.

6. In a water tube steam boiler, a plurality of upper chambers, a lower water chamber, a plurality of banks of water tubes each connecting one of said upper chambers to the lower chamber, a furnace in front of the front bank of tubes, an outlet for spent gases at the rear of the rear bank of tubes, the tubes in one bank being arranged in rows with the tubes behind each other aligned, the tubes in another bank being arranged in rows with the tubes behind each other in staggered relation, and means to cause hot gases from the furnace to pass in sinuous paths transversely across the bank of tubes that arearranged behind each other.

7. In a water tube steam boiler, at least two banks of tubes across which hot gases pass in succession, the tubes in the first bank with which the gases contact being arranged in rows with the tubes in one row behind those in the other rows, baffling causing the gases to follow sinuous paths through the bank, and the tubes in the other bank or banks being arranged in rows with the tubes in each row staggered with respect tothose in adjacent rows to cause the gases to follow sinuous paths through said other bank or banks.

8. In a water tube steam boiler, a plurality of upper chambers, a lower water chamber, a plurality of banks of water tubes each connecting one of said upper chambers to the lower chamber, a furnace in front of the front bank of tubes, anioutlet for spent gases at the rear of the rear bank of tubes, the tubes in one bank being arranged in rows with the tubes in one row behind those in another row, bafiiing in said bank causing gases flowing therethrough to follow sinuous paths across the bank, and the tubes in the other banks being arranged in rows with the tubes in each row staggered with respect to the tubes in adjacent rows.

9. In a water tube steam boiler, a plurality of upper chambers, a lower water chamber, a plurality of banks of water tubes each connecting one of said upper chambers to the lower chamber, a furnace in front of the front bank of tubes, an outlet for spent gases at the rear of the rear bank of tubes, the tubes in the front bank being disposed in rows with the tubes in one row behind those in another row, battling to cause hot gases from the furnace to flow in sinuous paths across the bank, and the tubes in the other banks being arranged in rows with the tubes in each row staggered with respect to those in adjacent rows.

DAVID S. JACOBUS.

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