US774419A - Water-tube boiler. - Google Patents

Description

No. 774,419. PATENTED NOV. 8, 1904. M. T. eoss. WATER TUBE BOILER.

APPLICATION FILED MAR. 18, 1904. N0 MODEL.

PRESSURE .JTEAM nventor,

Htto

Patented November 8, 1 904.

Unniran States PATENT @rrrca.

hlILFORD T. GOSS, OF DENVER, COLORADO.

aeren ruee'eonfie.

SPECIFICATION forming part of Letters Patent No. 774,419, dated November 8, 1904 I Application filed March 18, 1904. flerial No. 198,718. N0 model.)

To fl whom it may concern:

Be it known that i, MILFORD '1. Goss, a citizen of-the United States, residing at Denver,

in the county of Denver and State of Colorado, have invented a new and useful Water- Tube Boiler, of which the following is a specification.

This invention relates to improvements in boilers, and has for its object to prevent a deposit of sediment by increasing the rapidity of circulation of the water considerably above the speed at which the water moves under ordinary circumstances when subjected to the action of heat in the usual manner.

In steam-boilers it is disastrous to use water containing a large percentage of salts or other matter which would deposit on the boiler shell or tubes and by baking form a thick crust which would retard the passage of heat and at the same time serve to permit the burning' of the shell or tubes, and in many cases under such conditions the use of water-tube boilers particularly is wholly impracticable.

The principal object of the invention, therefore. is to overcome this ditlicull'y by greatly accelerating the speed of travel of the water by injecting into the boiler a jet or jets of steam under high pressure, these jets being directed against and into the boiler at points where the sediment will be most likely to accumulate and at the same time in such manner as to direct the water into its natural channel.

A further object of the invention is to provide for the cleaning of the boiler while in operation and under the usual pressure by arranging for the admission of jets of higherpressure steam at points where the sediment accumulates and adjacent to the lower blowolf holes or pipes.

\Vith thcse and other objects in view, as will more fully hereinafter a 'ipear, the invention consists in certain novel features of constrnction and arrangement of parts hereinafter described, illustrated in the accompanyinc drawings, and particularly pointed out in the appended claims, it being, understood that various changes in the form, proportions, sim, and minor details of the structure may l l l be made without departing from the spirit or sacrificing any of the advantagesof the invention.

In the accompanying drawings, Figure l is a longitudinal sectional view of a steam-boiler furnace embodying the invention. Fig. 2 a detail transverse section of a portion of the rear header.

Similar numerals of reference are employed to indicate corresponding parts throughout both l'ig'u res of the drawings.

The boiler is-supported in the usual mannor and is provided with a front header 1 and a rear header 2, these being connected by water-tubes 3, connected in the usual manner to the sheets forming the walls of the headers. Above the headers and connected thereto in the usual manner is a drum having atits rear and lowermost end a blow-otl' 5 similar blow-offs 6 being forincd on the bottom sheets of both of the headers.

The outer sheet of the rear header is provided with a plurality of hand-holes 7, (lisposcd in alinemcnt with the several water- 'tulrcs, and covering each opening is a handholc plate 8, the hand-hole plates being of the usual oval or elliptical type in order to permit the removal of each through the openings of said covers. The hand-hole plate is held in position by a bridge or binder ll), having" an'ope'nii'iggfor the passage of a hollow bolt 11, one end of which is tlrreaded and screwed in a threaded opening formed at the central portion of the plate. The opposite end of the hollow bolt is also threaded and receives a nut 12, which bears against the outer end of the bridge or binder, and by adjusting which the hand-hole plate may be drawn tightly against its seat. 'lhothrcadod opening in the platctl a so receives atln'caded section or nipple 14, disposed in axial alinement with the water-tube and having, preferably, a nozzle-shaped end in order not to interfere with the movement of the current of 'ater entering the tube. In practice one of these tubcs and tubecomicctions are arranged at the rear header 2 and in direct alincmont with each of the water-tubes of the boiler, the number of tubes dcpci'ulcnt on the size the blow-oil cock and permit the escape of tor and by keeping it in a constant state of and horse-power of theboiler. The several tubes 11 are connected to a source of steamsupply at a much greater pressure than the low-pressure boiler into which the steam is to be introduced through tubes 11.

In addition to the several connections in alinemcnt With the water-tubes an additional injecting-pipe is connected at 15, this being the front end of the drum, and similar connections are made at the opposite sides of the lower portion of the headers and adjacent to the bloiv-ofl'opcnings 6.

With a boiler of this character it is possible to use water carrying a very large percentage of salts or other matter which would in an ordinary boiler formadepositand cause the wearing out of the boiler shell and tube or tubes, the jets of higlrpressure steam ac celerating the natural circulation of thewamotion prevent a deposit, and any matter which may be precipitated will be instantly taken up and carried along with the current of water. The sedimentwill have a tendency to accumulate at the lower rear end of the drums and at the bottom of the two headers, and from time to time it is necessary to open sediment, the jet of steam directed at the front end of the drum and the jets directed into the opposite sides of the headers serving to prevent the formation ofa scale and insuring the complete discharge of all of the foreign matter at points adjacent to the blow- 0a cocks each time the latter are opened.

The boiler illustrated is of the water-tube type, and the jets of high-pressure steam will act more eiTectually in accelerating the current of water in boilers of this type than in tire-tube boilers; but is to be understood that the same principle may be applied in connection with boilers of any type by connecting same to the source of the higher-pressure steam by the usual means of pipe connertions without departing from the invention, (and any and all benelits arising from increased circulation as a result of the appli cation of this principle of introducir'm higherpressure steam into a lower-pressure boiler by means of these tubes and tube connections or i by the usual pipe connections are a part of this invention.)

Having thus described the invention, what is claimed is 1. The herein-described method of preventing the formation of deposits in boilers, said method consisting in introducing jets of highpressure steam into the water-space of the boiler at points below the water-line thereof.

52. The herein-described method of preventing the accumulation of sedimentary deposits in boilers, said method consisting in forcing jets of high-pressure steam into said boiler in positions to accelerate the natural circulation of water in the boiler.

23. The herein-described method of preventing the accumulation of sedimentary deposits in water-tube boilers, said method consisting in directing jets of high-pressure steam into the ends of the tubes in a direction to accelerate the flow of water through said tubes.

4. The herein-described method of preventin the accumulation of sedimentary deposits in boilers, said method consisting in introducing jets'ot' steam under high pressure into said boilers at points adjacent to the blow-off openings thereof.

5. In water-tube boilers, the combination with headers having hand-hole openings, of hand-hole plates, and hollow bolts serving to hold the plates in position, said bolts serv ng also for the passage of jets of high-pressure steam to the boiler.

(3. The combination with a Water-tube boiler including headers having hand-hole openings opposite the tubes, of hand-hole. plates having threaded openings, binders, hollow bolts extending therethrough and connected to the plates, a nutfor each of the bolts, and a nip ple connection in alinement with the hollow bolt and serving to direct the jet of steam in the direction of the water-tube with which it is in alinement.

in testimony that I claim the foregoing as my own I have hereto allixed my signature in the presence ol two witnesses.

MILFORD T. GOSS. Witnesses:

.\l. WiLsoN l. M. (loss.

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