US851030A - Magazine-boiler. - Google Patents

Description

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No. 851,030. PATENTED APR. 23, 1907.

Y A'. B. RECK.

MAGAZINE BOILBR.

APPLICATION FILED JULY 26, 1906.

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s Illflll Wl Tft/[S555 a LOM MWM J No. 851,030. PATENTED APR. 23, 1907. A. B. BECK.

MAGAZINE BOILER.

APPLIOATION FILED JULY 2a, 190s.

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/A/ vE/v Toi? W/ r/VESSES No. 851,030. PATENTED APR. 23, 1907.

A. B. REGK.

MAGAZINE BOILER.

APPLIATIGN FILED JULY 26, 1906.

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W/ T/VESSES /Mww 4 SHEETS-'SHEET 3.

PATENTED APR. 23, 1907.

A. B. REK.

MAGAZINE BOILER.

APPLIGATION FILED JULY 26. 1906.

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WITNESSES V/MWW/ mz Noam: pzrzns ca., wasmucrun, o. c.

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UNITED STATES PATENT FFIOE.

MAGAZINE-BOILER.

Specification of Letters Patent.

Patented April 23, 1907.

Application iiled July 26,1906. Serial No. 327,839.

.To all whom it may concern:

Be it known that I, ANDERS BoRcH Raon, captain, a citizen of Denmark, residing at Christiansvej 16, Hellerup, Denmark, have invented new and usefullmprovements in Furnaces for Magazine-Boilers, of which the following is a specification.

The object of my invention is to provide means for maintaining in boilers with a magazine for fuel a constant combustion with a high efficiency without the accumulation of the incombustible part ofthe fuel diminishing the rate of combustion during the periods where the boiler is left alone Without being attended to. The accompanying drawings show examples of application of my invention to dierent kind of boilers.

Figure 1 is a longitudinal vertical section through a sectional cast-iron boiler, being especially adapted for `non-bituminous coal or coke. Fig. 2 is a horizontal section of the Fig. 3 is a longitudinal vertical section through the fore part of a. cast-iron sectional boiler especially adapted for bituminous coal. Fig. 4 is a horizontal section through the boiler shown in Fig. 3. Fig. 5 is a longitudinal vvertical section through a steel or Wrought-iron boiler especially adapted to bituminous coal and with the grate inside the boiler. Fig. 6 is a horizontal section through the same boiler. Fig. 7 is a longitudinal vertical section through a steel or wrought-iron boiler also adapted for bituminous coal, but with the grate outside the boiler, connections being provided for the circulation of the water from the boiler through the water-chambers inclosing the grate and the pipes e and c, which connect said watcnchambers with each other. Fig. 8 is a horizontal section through the same boiler.

In all iigures the parts that serve to the same purposes are designated by the same letters.

It will now be seen that in all :figures the grate of the boiler is shown divided in two f parts, an upper part that is vertical and a lower part that is sloping down against the d support of the grate in order to keep a uniform thickness of the layer of fuel on the grate and in order to allow the ashes formed by the combustion to be pushed to the hind part of the grate by the fresh fuel sinking down from the magazine g, such ashes collecting in the hind part of the ash-pit that is open to the combustion-chamber. r

The upper vertical part of the grate is in all forms of the boilers shown formed of horizontal tubes c, said tubes being connected with the hollow side walls of the furnace in such a manner that the water of the boiler can circulate through the tubes.

The lower sloping part of the grate is in all forms of the boilers shown formed of ordinary grate-bars d, resting on tubes e, wherein the water from the boiler circulates in the same manner as in the tubes c. The grate-barsd are protected against being too hot partly by cont tact with the tubes e and partly by radiation .to the side walls of the furnace, the Water of the boiler circulating through said side walls and tubes, as explained above. In the boilers shown in the Figs. l-6 the grate-bars d radiate heat even to the bottom of the ashpit, said bottom being hollow and its interior space being filled with water and communi eating with or forming part of the boiler.

ln the cast-iron sectional boilers shown in Figs. 1, 2, 3, and 4 a strong circulation of Water can be produced through the horizontal tubes c and e, through which the waterspaces of the two side walls of the furnace communicate with each other. To attain this end, the front section of the boiler is divided by a vertical partition f, (shown in Fig. 2,) one side of said front section communieating with the section of the boiler next to it near its bottom, the other side of the front section being connected to the next' section near its top. When the water is heated in one side of the front section of the boiler by the action of the re, the result will be that such water will rise and pass through the top connection to the next section of the boiler, and fresh water will be drawn from the bottom of the said next section of the boiler to the other side of the front section and from there through the tubes c and e. It will be seen that in this manner the front section is really divided by the vertical partition into two separate water-chambers, connected to each other only through the pipes c. and e. A similar strong circulation through the tubes c and e can be produced in the boiler shown in Figs. 7 and 8. Here the furnace of the boiler is inclcsed on its sides by two water-chambers connected by the tubes c and e. bers communicates with the boiler at its hottom only and the other at its top only. Thus One of the said water-chamiQo f the heating of the water in the l. water-cham- I 1o ing the place of the consumed fuel and pushing (by its weight) the incornbustible part of the fuel (ashes and clinkers) down along the sloping grate to the hind part of the ash-pit, that is o en to the combustion-chamber h.

It wil be seen that the hind part of the ash-pit is large enough to hold a considerable quantity of ashes, and consequently these boilers can be run many hours before the ashes will collect to such an extent that the air-spaces between the slanting grate-bars will e clogged up, and even then combustion can go on, the air-spaces between the tubes c of the vertical part of the grate iving sufficient access to the air. It will furt er be seen that since the hindmost of the two pipes e, that sup ort the slanting grate-bars, is a tube cooled by the Water of the boiler no harm can be done to the said pipe even in case the attendant when clearing the ash-pit for ashes takes out so much that some burningfuel comes down below the pipe.

t will be seen that in all forms of boilers shown in the figures the fuel-ma azine is quite open to the combustion-cham er h, no water-cooled surfaces separating the fuelmagazine from the combustion-,chamber and preventing the products of the combustion rom attaining such a high temperature that is the most effective for a good combustion of the gases in the combustion-chamber. Further, it will be seen that in all forms of boilers shown in the figures an air-channel 1' is covering the whole front of the boiler. The object of this channel 'r is that the air destined to pass to the fuel through the grate (the primary air) may be heated to as high a temperature as possible. The air passes into the 4upper part of the channel r, where the entrance of the air is marked by arrows and is led down to the ash-pit, a plate 1 formin the inner wall of the lower part of the air-c annel, the front door 7c of the boiler forming the outer wall. While the air passes through channel r it takes up heat that else would e radiated and lost from the front ofthe boiler, whereas now the heating of the air before it goes through the rate contributes a great eal to a good com ustion in the furnace of the boiler.

If the boilers, as the three boilers shown in the Figs. 3 8, are destined for bituminous coal, the combustion in the combustionchamber h is improved by introduction into said chamberof highly-'heated air direct from outside (secondary air.)

In Fig. 4 will be seen air-channels 0 for the secondary air rising along the inner walls of the water-chambers that lnclose the furnace. These air-channels o have openings to the outside air through the outer walls of the water-chambers and unite in a horizontal channel o over the combustion-chamber h, as shown in Fig. 3. The vertical parts of the air-channel o are closed to the furnace side by fire-bricks ',u, (see Fig. 4,) and the horizontal part of the channel is se arated from the combustion-chamber by a arge block of firebrick q, that will be highly heated by the gases burnin T in the combustion-chamber. As shown in 4ig. 3 and Fig. 4, said block of fire-brick g is perforated with holes, through which the secondary air finds its way from the channel o to the combustion-chamber. Similar air-channels 0` and blocks of firebrick g are shown in Figs. 6 and 7 and serve for the same purpose as described for Fig. 3 and Fig. 4-viz., to give access for highlyheated air direct into the combustion-chamber when bituminous coal is to be used for the boilers.

Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

1. In a boiler for steam or water the combination of a fuel-magazine, a grate divided into an upper vertical part and a lower sloping part situated below the fuel-magazine and a combustion-chamber with watercooled walls open as well against the fuelmagazine as against the ash-pit behind the sloping part of the grate.

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2. In a boiler for steam or water the combination of a fuel-magazine, a grate divided into an upper vertical part and a lower sloping part situated below the fuel-magazine, a combustion chamber with water cooled walls open as well against the fuel-magazine as against the ash-pit behind the sloping part of the grate and an air-channel with access for the outside air, said channel covering the front of the boiler and opening into the ashp 3. In a boiler for steam or water the combination of a fuel-magazine, a grate divided into an upper vertical part and a lower sloping part situated below the fuel-magazine, a combustion chamber with water cooled walls open as well against the fuel-magazine as against the ash-pit behind the sloping part of the rate, and an air-channel opening into the sald combustion-chamber through a fire-brick lining over said chamber.

4. In a boiler for steam or water the combination of a fuel-magazine, a grate divided into an upper vertical part and a lower sloping part situated below the fuel-magazine, a combustion chamber with water cooled walls open as well against the fuel-magazine as against the ash-pit behind the sloping part of the grate, and horizontal pipes between s'aid water-cooled chambers, said IIO ISO

pipes forming the vertical part of the rate and the supports of the sloping part o the grate, and said water-cooled chambers being connected to the boiler one at its bottom and the other at its top.

5. In a boiler for steam or water the combination of a fuel-magazine, a grate divided into an upper vertical part and a lower sloping part situated below the fuel-ma azine and sloping down against a horizonta pipe supporting the back end of the grate and having its ends inserted into the inner walls two subscribing witnesses.

ANDERS BORCI-I RECK. Witnesses:

JOHANNES NEILsEN, T. J ENsEN.

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