US1550902A - Regenerative heater foe compressed air ist oil furnaces - Google Patents

Description

Aug. 25, 1925. Y C. C. HANSEN REGRNRRATIVE HEATER RoR coMPRRssRD A'IR IN. OIL FuRNAcEs Filed Jan. 22. 1924 INVENToR M'e (flcm'en.

BY JM/@aa His ATTOR EY JPatented tug. Z5, i925.,

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CHARLES HANSEN, OF EASIGN, IPENNSYLVANIA, ASSGNOR TO INGERSOLIi-RAND COMPANY, 0F JERSEY CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

REGENERATXVE HEATER FOB CGIHPRESSED AIR EN OIL FURNACES.

Application filed January 22, 1924.

To all whom t may concern.'

Be it known that I, CHARLES C. HANSEN, a citizen of the United States, and a resident of Easton, county of Northampton, and State of Pennsylvania, have invented a certain Regenerative Heater for Compressed Air in Cil Furnaces, of which the following is a specification, accompanied by drawings.

This invention relates to heaters, furnaces, forges and the lilre and more particularly to oil burning furnaces in which a supply of air is employed to atomize the oil at the nozzle.

lt has been found advantageous te preheat the air used for atomizing such oil and the object of this invention is accordingly to enable air used for this purpose to be preheated to a high degree by waste heat from the forge.

Cther objects of the invention will become apparent from the following description taken in conjunction with the drawing in which there is illust-rated one form which r the invention may assume in practice.

Figure 1 is a front perspective view of a forge constructed in accordance with the practice of the invention, and

Figure 2 is a sectional view along the line 2-2 ofv Figure l, looking in the'direction of the arrows.

The forge illustrated is of the type ordinarily used forI heating rock drill steels preparatory to forging, and comprises a base formed by two uprights A braced by diagonals B and a cross bar C adapted to support a cast iron box D lined inside with fire brick E into which a burner F is adapted to inject the combustible mixture of air and atomized oil. There is provided an aperture Gr in the boX D in front of the burner F to admit the burning mixture of oil and air which is deflected sidewise by the curved brick lining E. rlhe products of combustion are permitted to escape through the suitable apertures H in the front and rear of the box. If desired, articles such as for instance a drill steel J are inserted for heating through one of the apertures H at the front or rear. A front rest K is provided upon which to lay the steel J.

If it is desired to use only one side of the forge, the rear aperture H may be closed to prevent excessive loss of heat. A guard L is provided at the front of the forge and Serial No. 687,837.

at the back if so desired, to prevent to some extent the heated gas from being directed at the operator. Suitable rods C passing through the upwardly projecting side walls l? of the box D may be used to support the guards L.

A suitable combustible oil is supplied to the burner F through a supply pipe Q. Compressed air for atomizing the oil at the burner is supplied through the pipe R. The supply of fuel and atomizing air is regulated by a valve controlled nozzle S at the burner while the supply of fuel and air may be separately controlled by suitable valves T and U in the pipes Q and R respectively.

The compressed air fed to the nozzle S is supplied from a main supply pipe V extending across thel upper portion of the forge between the front face of the box D and guard L. From thence the air is conducted through suitable pipes VV connect-- ing with the pipe R and leading to the nozzle S. If desired, an additional valve X may be placed in the supply pipe V to shut olf the air furnished to the nozzle S. The pipe V may malte as many loops between the guard L and the front of the box D as are necessary to preheat the air for obtaining the most economical results. A single loop is usually suihcient for this purpose as shown in the drawing. In order to direct the heated gas issuing from the aperture H more effectively against the pipe V, a blast of air is directed from a, pipe Y supported by the rest K and having a plurality of small apertures Z along its length directed at the pipe V. The blast pipe Y is connected through a valve b to the compressed air supply pipe W at a pipe connection c. An air injector Z is employed to increase the supply of air to the blast pipe Y at somewhat decreased pressure. The air blast issuing from the apertures Z also directs the current of heated gas in the aperture H implement opening and close to the furnace wall and connected to the fuel burner, a branch pipe leading` from said fuel burner extending upwardly and then across the front of the furnace directly below the implement opening, said cross connection having perforations across its top for directing the air under pressure across the front of the implement opening towards the air pipe above the openingfor directing` the heated air from the pipe and also the products of combustion from the furnace around the @mgm mi.;

CHARLES C. HANSEN.

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