US995751A - Steam-generator. - Google Patents

Description

c. 0. WORTHINGTON.

STEAM GENERATOR. APPLICATION FILED JAN. 27, 1909.

Patented Jung 20, 1911.

IIIIII ora ion.

CHARLES C. WORTHINGTON, F DUNNFIELIDQNEW JERSEY.

STEAM-GENERATOR.

To all whom it may concern:

Be it known that I, CI-IARLEsC. WORTH- INGTON, a citizen of the'United States, residing at Dunnfield, in the county of /Varren and State .of New Jersey, have invented a certain new and useful Improvement. in Steam-Generators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

My invention relates to that class of steam generators known as flash or semi-fiash boilers in which the feed water passes to the boiler about as the steam is withdrawn from it and is vaporized as it is brought in contact with those surfaces of the boiler which have. been heated to a high temperature.

The object of my invention is to provide an improved boiler of the flash or semi-flash type using fluid fuel which can be constructed and repaired at a minimum cost; which shall be free from all tendency to prime or to pass any of the water contained in the boiler to the engine before it has been vaporized; which shall contaiir the maximum amount of heatingsurface for the amount of space it occupies, and which shallbe capable of attaining as high an economic efficiency as any of its type. y

The invention consists in the novel design and construction of the generator as set forth and described in the following specification and particularly pointed out in the claims.

In the drawings, Figure 1 shows a central vertical section of the generator. Fig. 2 shows a sectional view of the generator, taken on line 2'2 of Fig.

In the present exemplifi tation of the invention. A'is a jacket or casing constructed of sheet metal in cylindricalform and lined with asbestos A, or other non-conducting material.

B is the mixing tube of a'burncr or heater where the fuel is mixed with the air.

C is the combustion chamber which is preferably tubular in construction and is provided with a flanged or enlarged lower portion C.

D is a baffle plate or heat deflector at the top of the generator adjacent the end of the combustion chamber (1.;

E is a continuous tube preferably formed in a series of coils in which the feed water is vaporized and superheated, and these coils surround the combustion chamber be- Specification of Letters Patent.

Application filed January 27, 1909. Serial No. 474,584.

yond the flanged or enlarged portion thereof and terminate remote from the other end of the chamber 0.

F is the inlet through which the feed water is admitted to the tube.

issues.

Patented June 20, 1911.

G is the outlet through which the steam, i

H is a support on which the bottom coil i of the tube E rests.

J is the frameworlron which-the generator with that part of the tube containing the, i dryest steam and farthest removed from that part of the tube into which the feed water enters and that the direction in which it passes shall be such that it shall successively be brought. in contact with the various sections of the continuous tube in the follow mg order: First, the section containing the steam which can thus be superheated to the greatest advantage: second, the section con; taming the water which has been heated to the point of vaporizing, andlastly, the-sec; 'tlOn conta ning the feed water as it com mences to flow through the boiler.

It has heretofore been the general practice with boilers of this type to direct the heat from the combustion chamber in such manner that ltshall be at once brought in contact with the lower coil of the tube and then pass in an upward direction around.

and between the other coils being succes, .1

sirely brought in contact. with the upper sections of the tube. in the order of their posltlon and reaching the topmost coillast of all. From thence the'gases are conducted to the atmosphere through a casingon the outside of the generator.

order that the gases passing upward in this manner through the tube shall be 'made to meet first the coils containing the steam,

Heretofore, in

and last,'the coils containing the water, in u the manner best adapted to utilize the heat 1 as described above, it has bcennecessar to' introduce between the. various sect-ions or COllS of the tube compllcated bends, forming loops or traps, reaching fromeach section of the coils to the level of the topmost coil of the generator; thence back again to the section below the one from which it started. This method of trapping each section of the tube prevents to a certain degree the water quently happens that from flowing by gravity and steam sections. But in practice, it frethese traps or loops between the sections tail to overcome the tendency of the water to run through the tube by gravity with the result that priming ensues and the engine is endangered. The bends in the tube that are necessary to form these traps require a multiplicity of joints, liable toleak and difficult to repair. The bends also form obstructions to the tree circulation of the water and for the lodgments of burnt oil sediment or other foreign material. These traps, which must necessarily overlap and surround the coils, make the coils difficult of-access and expensive to renew. With the improved construction shown in ency to prime is entirely overcome as the continuous tube E in which the steam is generated is coiled ranged that the water to be vaporized shall enter the tube at the lower end and flowing through the successive coils to the upper end in a direction contrary to the force of gravity, shall be gradually heated and progressivelyand gradually vaporized and superheated in-its passage. The combustion chamber C is of such size as to insure and free combustion of impinging against the baffle plate I) at the top of the generator, are deflected and pass down on the outside of the combustion chamber and between the coils of the tube, following a general. direction opposed to the flow of the liquid and steam through it. By providing the enlarged extremity C of the combustion chamber C, which enlargement projects below the lowermost coil, the heat from the heater or burner B will be prevented from coming directly into contact with the lowermost coil, but will be directed into the combustion chamber C'to be carried therethrough and be discharged therefrom against the uppermost coil.

the full admixture the gases which,

coil and at the point which is in contact with" the products of combustion, When at their highest temperature.

With an improved generator 7 g in this manner, thc'natural tendency of the water is to remain in the-lowest sections of my invention, this tendhorizontally and so 'ar-.

By this arrangement of the tube and location'of the combustion chamconstructcd long enough to contain i ng the chamber,

to the super-heating the tube, while. the steam will always collect in the upper sections, where it is superheated to the best advantage and all tendency of the water to be forced in advance of the steam and carried to the engine with the steam is avoided.

Another feature of the invention is that the coils are entirely separate from the shell which forms a part of the combustion cham her and also from the shellv forming the outer casing. The tube can be fastened in any convenientmanner tothe support ll, While tllGiCOHlbllSllOIl chamber C may be supported in any suitable manner from the ,framework, such as by means of clips or brackets D. The outer-shell A may also be supported by" the framework J and the burner or heater Ema-y he held in position inany suitable' manner. 'By this arrangement, if an examination of the coils is undeytaken, the outer shellA may be lifted off, t'ully exposing the coils. sired to remove the coils,'the y can be lifted clear from the burner portion by merely unfastening them from the supports Hand disconnccting'the pipes "F and G. portant feature of accessibility is not found in other boilers of this type. a

Another advantage to be derived from the design and construction ofthe generator when made in accordance with the principles of this invention is that, if the tube be made the required amount of heating surface, the bending process mav be continuous from each coil to the next coilfthus securing the great advai'itage of having the, gnerator consist of but one unjointed sinfil tube.

It is to e understood that although the preferred ipianner of construction and arrangementi'pf accomplishing the desired result h'avef been fully set forth, various changes may be made in the details of con struction and arrangement of the several parts without departing from the spirit of the invention. a

What I claim as new is:

1. In a boiler of the character described, the combination with a combustion chamber, of a series of connected coils surrounding said chamber and" having an inlet and an outlet separate therefrom, a casing Sui If it is de- This imjacent onfeieiid of the chamber, saidchamber bei adapted to conduct the products of combps fion through the coils out of engagemepttherewith and discharge the same into 'Ehecasin'g beyond'the coils, to be deflected against the coils.

2. In a boiler, the'combination with an upright combustion chamber, of a plurality of superimposed connected coils surroundsaid coils having an inlet at the lower end and an outlet at'the upper end, said chamber projecting beyond the coils, the lower extremity of the chamber being enlarged, a burner adjacent the said enlarged end of the chamber, said chamber scrring' to convey the products of combustion through the coils out of engagement therewith and discharge the same at the top of the coil, a hood inclosing the coils and upper extremity of the chamber, and means for deflecting the heat against the topmost coil and in a direction toward the lowermost coil.

3. In a vertical boiler, the combination with a continuous tube formed in a series of superimposed horizontal coils, of a casing entirely surrounding the coils. a combustion chamber surrounded by the coils and through which the products of combustion pass in an upward direction, and a deflector within the casing: for directing the said products tl'n'ougl'i the coils in a downward direction after they have passed through the said chamber.

4. A steam generator comprising a combustion chamber, a series of coils, and a casing covering the coils, each of the elements beingentirely independent and detached from the remaining elements, said parts being arranged with respect to each other that the products of combustion will be directed against the coils from the chamber, the feed water and steam passing in sequence from one coil to another in an upward direction contrary to the direction of tlow of the heatin medium against. theroils.

a. in a boiler, the combination of a plurality of superimposed connected coils, said coils having an inlet at the lower end of the series and an outlet at the top of the series whereby the fluid will be fed in an upward direction through the coils, and means for supplying heat to the coils from the outlet. toward the inlet end in a direction opposed to the direction of flow of the iluid through the coils, said means serving to prevent the heat from contacting with the coils during its passage from the inlet toward the outlet end.

In tcstimony whereof I have signed my name to this specification, in the nrcsence ot' two subscribing witnesses, on this seventh day of January, A. D. 1909.

CHAS. C. WORTHTNGTONJ

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