US851099A - Feed-water heater. - Google Patents

Description

PATENTED APR. 23, 190v s. J. LOGAN & D. v. RICHARDSON FEED WATER HEATER. AP-PLIOATION FILED JAN.17,1906.

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SAMUEL J. LOGAN, OF GRAND RAPIDS, MICHIGAN, AND DONALD V. RICHARDSON, OF BUOKSPORT, SOUTH CAROLINA.

FEED-WATER HEATERn Specification of Letters Patent.

Application filed January 17, 1906 Serial No. 296,517.

To all whom it may concern.- Be it known that we, SAMUEL J. LOGA and DONALD V. RICHARDSON,- citizens of the United States, residing, respectively, at 5' Grand Rapids, Kent county, Michigan, and at Bucksport, in the county of Horry and State of South Carolina, have invented a new and useful Feedater Heater, of which the following is a specification. This'invention relates to feed water heaters, and has for its principal object to provide a feed water heater which may be employed as the top of furnaces of that general type known as Dutch ovens.

The Dutch oven type of furnace is in common use in saw mills, and is intended to utilize saw dust or comminuted wood as fuel, the fuel being fed in at the top of the combustion chamber in a practically continuous stream, and the products of combustion being thence directed into contact with a' tubular boiler.

In utilizing waste material of this class for fuel, it is found necessary to feed the fuel in at the top of the combustion chamber. The furnace tops are usually formed of channel or I beams and fire brick, the latter being so arranged as to permit ready renewal, and such tops are quickly destroyed, owing to the intense heat, and much of the heat is lost owing to the fact that it is practically impossible to extend the boiler proper over the top of the combustion chamber.

A further object of the inventon is to provide a furnace top which may be made and sold as an article of manufacture, and applied to the tops of the combustion chambers of Dutch oven furnaces, the top being of such construction as to utilize the greater portion of the heat in raising the temperature of the water in advance of its admission to the boiler.

A still further object of the invention is to provide a furnace top of simple and economical construction in which provision is made for establishing a circulation of the water in order to more quickly heat the same, and for the purpose of preventing the burning out of the lower sheet, which, when in position, forms the crown sheet of the combustion chamber.

With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of constructure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings:Figure 1 is a vertical section of a furnace of the Dutch oven type provided with a feed water heater constructed in accordance with the invention. Fig. 2 is a sectional perspective view of the feed water heater detached.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawmgs.

The furnace A is of a type in common use in saw mills, and is generally known as the Dutch oven furnace. This furnace is provided with a combustion chamber B to receive the fuel, the fuel consisting exclusively of saw dust or comminuted wood which must be fed in at the to of the furnace, it being found impracticab e to feed'the material in any other manner. This prevents the extension of the boiler C over the top of the combustion chamber, and as a rule the heat at the top of the chamber is wasted. The tops are usually formed of channel or I beams, and fire brick, but the latter are quickly destroyed by the intense heat, and must be frequently replaced. I

In carrying out the present invention the top of the combustion chamber is formed by a feed water heater 10 of generally rectan gular contour, and which may be made of any length or width and placed on the market as a separate article of manufacture to be applied to existing furnaces.

The feed water heater as shown in the present instance is formed of an upper plate 10 and a lower plate 12, the edges of which are provided with vertical flanges to which are riveted side and end members 15, and in practice the walls of the combustion chamber are built up within these flanges so that the feed water heater may be readily placed in position and held by the walls from movement in any direction, although the edge flanges of the plates may be turned inward instead of outward, in case the capacity of the heater is increased. The two plates are provided with flanged openings, united by a vertical plate or plates 16 in order to form a' passage for the comminuted fuel. Arranged within the feed water heater are two or more I beams 1748, which preferably extend from endto end of the heater, the horizontal webs of said beams being riveted or otherwise secured to the upper and lower plates. The beam 17 is provided with a water passage 19 near one end, and the second beam 18 has a similar passage near the other end. The water is supplied from a feed pump or the like through a pipe 2]., and is discharged through a pipe 22 to the boiler.

In operation, the water forced through the pipe 21 will be compelled to circulate through the spaces formed between the several I beams and the vertical. walls of the feed water heater before escaping through the pipe 22, so that the water is kept constantly moving over the crown. sheet of the combustion chamber, preventing the burning out of the sheet, and at the same time raising the temperature of the Water.

Vie claim:

A Dutch oven furnace having a combustion chamber, and a top or cover therefor, comprising spaced upper and lower plates having flanged edges, vertical plates forming the side walls and riveted to said flanges, bars arranged between the plates, and each provided at one end with a water passage, and water pipe connections, whereby the top may be coupled to a source of water supply and to the boiler, substantially as described.

In testimony that we claim the foregoing as our own, we have hereto affixed our signatures in the presence of two witnesses.

SAMUEL J. LOGAN. DONALD V. RICHARDSON. lV-itnesses:

J. Ross CoLnoUN, O. E. DOYLE.

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