US1373177A - Steam-boiler - Google Patents

Description

J. A. DOBLE.

STEAM BOILER.

APPLICATION FILED MAY 22, I9I8.

Patented Mar. 29, 1921.

INVENTOR.

Job A. fl- D0545 BY p WITNESS ll it it ti UNI TED STATES PATENT OFFICE.

JOHN A. DOBLE, OF SAN FRANCISCO CALIFORNIA, ASSIGNOIR TO DOIBLE LABORA- TORIES, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALIFORNIA.

STEAM-'IBOILER.

Specification of Letters Patent.

Patented Mar. 29, 1921 Application filed May 22, 1918. Serial No. 235,950.

To all whom it may concern:

Be it known that I, JOHN A. Donna, a citizen of the United States, and a resident of the city and county of San Franclsco and State of California, have invented a certain new and useful Steam-Boiler, of which the followingis a s eeification.

My invention re ates to tubular steam boilers and more particularly to that type commonly known as semi-flash boilers.

An object of the invention is to provlde a boiler of the character mentioned in which the heat issuing from the burner enters the boiler at the saturated steam zone and travels through the boiler in the opposite d1rection to the water.

Another object of the invention is to provide a steam boiler of the character mentioned which provides a large steam liberating surface.

A further object of the invention is to provide a steam boiler of the character men tioned in which the hot gases are caused to travel in a tortuous path around the tubes in the boiler.

The invention possesses other advanta geous features, some of which, with the foreoing, will be set forth at length in the lollowing description where I shall outline in full, that form of the invention which I have selected for illustration in the drawings accompanying and forming part of the present specification. In said drawings I have shown one specific form of the boiler of my invention, but it is to be understood that I do not limit myself to such form, since the invention, as expressed in the claims may be embodied in a plurality of forms.

Referring to said drawin 'sz Figure l is a vertical section through the boiler of my invention.

Fig. 2 is a plan View of the water tanks.

Fig. 3 is a front elevation of the water tanks.

Fig. 4 is a cross section on an enlarged scale taken on the line 4% Fig. 2.

The boiler oi my invention is of the series tube type, that is, a boiler having" a single "Water tube, bent into cnnvolutions, so that the water travels in a long circuitous path through the boiler. The tube 3 is arranged in plurality of superposed liorinontal grids, the successive convolutions oil each grid lying" parallel. to each other and pan laterally with relation to eachother, so that the gases of combustion pass in circuitous paths downwardly tubes. The grids are connected together in series, forming in eifect, a single tube.

Adjacent the upper end of the shell, the tube is connected to a series of superposed arc-shaped tanks 6 connected together in series and inclosing an open space which is the combustion chamber for the fuel mixture. Steam is liberated in these tanks and passes into the superheater tube 7 arranged above the tanks in one or more grids. Superheated steam is discharged from the boiler through the pipe 8.

The burner 9 is arranged to discharge a flame into the boiler at the saturated steam zone or into the space surrounded by the saturated steam tanks 6, and the products of combustion pass downwardly through the grids of Water containing tubes and are discharged through the vent 12 at the bottom of the boiler. Water is introduced into the tube at the lower end and travels upwardly, in the opposite direction to the products of combustion, thereby insuring a maximum transfer of heat from the gases to the water. By introducing the fire at the saturated steam zone, the maximum amount of steam is liberated from: the hot water which is heated as it ascends through the tube and this steam is superheated in the tube 7 be fore it discharges from the boiler. This boiler is particularly advantageous for steam automobiles, because the series tube arrangement and the introduction; of the fireat the saturated steam zone, causes the very rapid generation of steam from an all cold condition, thereby permitting the automobile to he driven in a very short time after the fire is started.

Means are provided for keeping the tanltn it, partly filled with water, so that a large steam liberating surface is provided. These tanlrs are horizontally disposed and are con-- through the grids of Y til it l. l ll nected together in series so that the water flows from one tank to the other. The adj acent ends of two successive tanks are connected together by a block14 having a passage 15 therein, which opens upwardly on the face of a shoulder extending into the tank. \Vater must rise in the tank to the level of the shoulder before it passes to the tank next above and when it rises above this level it is discharged into the next upper tank. This keeps the level of the water in the tanks at substantially the level of the shoulders.

The boiler includes three zones, the water heating zone, the steam liberating or saturated steam zone and the steam superheating zone. The fire enters'the boiler from the blower burner at the saturated steam zone and passes downward through the water heating zone'in the opposite direction to the water therein. The burner 9 is of the rotary type and produces a mixture of liquid hydrocarbon fuel and air which is ignited and blown into the saturated steam zone in the boiler.

In. the specification, I have described the tubular grids as being formed of parallel tubes arranged parallel to the diameter of the casing, but it is to be understood that the tube or tubes forming each grid may be disposed in any desirable manner either circumferentially, spirally or otherwise.

I claim:

1. In a boiler, a series of connected tubular grids arranged one above the other so that water passes upwardly through the grids successively, a series of tanks arranged above and connected to the series of grids and inclosing a combustion chamber, superheater tubes connected to the tanks and disposed above the combustion chamber and means for introducing a flame into the combustion chamber and directing the heat thereof downwardly through said grids.

2. In a boiler, a series ofconnected tubular grids arranged one above the other so that water passes upwardly through the grids successively, a series of connected horizontal arc-shaped tanks arranged above and connected to said series of grids, means for maintaining said tanks partially filled with water, superheater tubes arranged above and connected to said tanks, means for introducing a flame into the space inclosed by said tanks and an outlet for the products of combustion at the bottom of the boiler.

3. In a boiler, a water tube through which water passes upwardly, a series of tanks arranged above and connected to said water tube, superheater tubes connected to and arranged above the tanks, and means for introducing a flame into the boiler at the zone of the tanks.

4. A boiler comprising a casing, a series of connected horizontal tubular grids therein arranged. one above the other so that water passes upward through said grids successively, a series of connected tanks arranged above and connected to said grids, a horizontal tubular grid arranged above and connected to the upper of said series of tanks, and means for introducing a flame into the space inclosed by the tanks.

In testimony whereof, I have hereunto set my hand at San Francisco, California, this 16th day of May, 1918.

JOHN A. DOBLE.

In presence of H. G. PRosT.

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