US103408A - Improvement in steam-generators and furnaces - Google Patents

Description

UNITED TATEs PATENT OEEICE.

JoNATHAN AMoEY, or vvEsT ROXBUEY, MAssAcEUsETTs.

IMPROVEMENT IN STEAM-GENERATORS AND FURNACES.

Specification forming part of Letters Patent No. 103,408, dated May 24, 1870.

To all whom it may concern:

Be it known that I, JONATHAN AMORY, of West Roxbury, in the county of Norfolk and State of Massachusetts, have invented an Improvement in Steam Generators; and I do hereby declare that the following, taken in connection with the drawing which accompanies and forms part of this specification, is a description of my invention sutllcient to ena-ble those skilled in the art to practice it.

This invention relates to an improvement upon my invention patented April 19, 1859, and reissued August 29, 1865, in which the gases liberated from the solid fuel are intercepted before they pass ott' into the chimney, and are caused to eddy and intermix with themselves and with heated air, so as to insure the combustion of the gases.

In my said patented invention I made use of what I termed curves, by which I formed combustion chambers or spaces, in which the liberated gases were intercepted, as before stated, and, being ignited and consumed, added to the caloriiic e'ect produced.

My present invention consists in combining, with combustion-curves in a steamgenerator, conduits through which the water in the gen erator will pass from the generator to the combastion-curves, where heat is added to the water, and back to the generator, with an automatic, free, a-nd rapid circulation.

As the water in passing the combustioncurves is heated by absorption of caloric produced at that locality by combustion of the gases there, the curves are thereby protected in a measure from the destructive eii'ects of intense heat.

The curves may be made of masonry, firebrick by preference, or of metal, in which case they may be made as well-stayed hollow tanks, connected with the water in the generator at two points or levels, one lower than the other. When they are made of masonry, then I make use of pipes, more or less embedded therein, for conduits, said pipes being connected with the water in the steamgenerator at two points on different levels, as described, for the curves when made as stayed metallic tanks.

The water in the conduits will follow the well-known law governing the circulation of heated fluids when fuel is consumed in the furnace, and will enter from the generator at the lowest level, and, rising as it is heated by the combustion at and about the curves, will flow through the conduits back into the generator at the highest level.`

Figure 1 shows, in sectional side elevation, a boiler or steam-generator, which may be of any of the known types, set with a furnace in brick-work, and so as to embody my present invention, the section being merely of the briclrwork, which is represented as partially removed to exhibit the parts beyond. Fig. 2 is a cross-sectional elevation, the section being taken in the line y y, and the elevation showing in looking from the rear toward the furnace end. Fig. 3 is-a view similar to Fig. 2, the section being taken on the line zz, Fig. 1, and the elevation being that seen in looking toward the front of the boiler. Fig. 4 is a central vertical longitudinal section taken in the plane of the line a: x, Figs. 2 and 3.

c is the steam-generator, which is to be partly filled with water. b are the furnacegrates, beyond which, toward the rear of the boiler a, are the curves c and d, which form the combustion-chamber, iu which thegases which proceed from the partial combustion of the fuel on the grates are caught, eddied, and mixed, and also mingled with heated air and consumed.

The drawings represent the said curves as constructed of masonry; but it will be evi dent that they might be made of metal, as de scribed in my aforesaid patent and reissue, or as water and steam tight tanks, stayed against rupture from internal pressure.

The curve c, which serves as the bridge-wall of the furnace, is made, in practice, with its upper edge concentric with the boiler, where placed under it and about four inches from it, for Hue-space, through which the gases pass into the space between the curves, while the upper edge of the rear curve, d, is brought nearer the boiler-dsay, about two inches disA tant from it-so as to check the flow into the flue beyond.

In the flue e, beyond the curve d, are located pipes, which receive air at their open rearends, and pass it forward into the space between the curves, the air being heated on its passage into the combustion-chamber. One of these pipes, h, is connected with a cross-pipe, i, set in the masonry of curve c, said pipe al being perforated with small holes, as seen in Fig. 3, through which the heated air escapes into the space between the curves to mingle with the gases therein. The other pipe, f, connects with a cross-pipe, g, perforated as and for the same purpose with pipe i, and set in the Inasonry ofl curve d. l

In each curve, if made of masonry, is set one or more conductors or pipes, which are connected with the Water in the steam-genen ator, as seen atjj and 7c kf, the pipes jj proceedin g from the steam-generator from a lower level than the pipes k 7c', and both sets of pipes opening into or from the generator at points below the Wateitlevel therein, so that circulation through said pipes will be estabblished and maintained from the generator through the said conduits or pipes back to the generator again, as indicated by the arrows seen in the drawing. This Water, whether passing through pipes in metal or masonry curves or through metal-tank curves, absorbs the heat generated by the combustion of the gases in the space boundcdby the curves, and saves them from destruction, and adds greatly to the evaporative efficiency of the boiler.

It is immaterial how the hot current proceeds after leaving lue c, though if it contains more heat than is necessary for the establishment of a sufficient chimney-draft, it may be made to pass over the top ofthe boiler from the rear to the front and back again to the chimney by means of suitably-arranged fines.

The space beneath the curves c and d is constructed like a hopper, to receive ashes and other solid matter which may deposit there, and which may be removed through a door, Z, communicating with the ash-pit.

Though I have described my invention as in connection with a double curve, it will be apparent that it may be used Well With but 011e curve.

I claimln steam-generators, the combination of one or more combustion-curves with one or more conduits, arranged for circulating the water from the generator through the curve or curves back to the generator, additionally heated, substantially as set forth.

' JONATHAN AMORY.

Vitnesses:

J. B. CROSBY, L.,H. LATIMER.

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