US278496A - brooks - Google Patents

Description

2 Sheets-Sheet 1.

W. 'H; BROOKS. MEANS FOR UTILIZING THE WASTE-HEAT 0F FURNACES.

No. 278,496. Patented May 29,1883.

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. (No Model.) QSheets-Sheet 2.

W. H. BROOKS.

MEANS FOR UTILIZING THE WASTE HEAT OF FURNACES.

No. 278,496. I Patented May 29.1883.

ing from the burner, the flame from the burner 1 UNITED STATES PATENT OFFICE, i

WILLIAM H-QBROOKS, OF NEW YORK, N. Y.

MEANS FOR UT lL lZlNG THE WASTE HEAT OF FURNACES.

SPECIFICATION forming part of Letters Patent No. 278,496, dated May 29, 1883.

V Application filed February2l l883. (No modell) 7 specification.

This invention relates to that class of furnaces in which ore, metal, or other material to be treated is spread upon a hearth and exposed to the action of a flame which passes over a bridge-wall.

The object of my invention is'to utilize the waste heat from the furnace to heat air, which is conducted to therear of the furnace and delivered into the furnace-chamber and around' or upon a hydrocarbon-burner, for the purpose of supplying ample air in aheated condition to support combustion of the vapor-gas issubeing directed downward upon the furnacehearth, whereby a flame of great intensity is provided and the furnace can he worked without coal or similar fuel, while the cost of flameproducing material is materially reduced over coal or like fuel.

The object of my invention I accomplish in themanner and by the means hereinafter de-i scribed and claimed, and illustrated in the accompanying drawings, in which Figure 1 is alongitudinal vertical sectional view of a reverberatory furnaceembodying p my invention; Fig. 2, a detached perspective view of the tubesfor receiving the air to be heated and conducted around or upon the vapor-burner, and Fig. 3 is a transverse broken sectionalview takenon the line as a: of Fig. 1.

a The reverberatory furnace may be constructed, as usual,with a rear furnace-chamber, number 1, a bridge-wall, 2, a hearth, 3, a front vertical flue, 4, and an enlarged chamber, 5, above the top wall, 6, which is located over the hearth, such top wall being deflected, as at7, to direct the waste heat and flame downward to the throat 8, which leads to the front vertical flue, 4. In the example shown a steam-boiler, 9, is located over the waste-heat-receiving chamber 5, in such manner that the waste heat is caused to pass through the flues 10 and out through a stack or chimney, thus producing steam in the boiler for running an engine to actuate machinery.

Within the chamber 5 is arranged the apparatus for heating the air which is to be supplied around or upon the hydrocarbon-burner,

and it consist of two rectilinear hollow boxes, 11 and 12, the former being placed againstor near the rear side of the latter, and to the box 11 is secured one end of a series of tubes, 13, which are arranged parallel to each other, and bent, as at 14, to. extend back to the box 12,

with which this end of the series of tubes is secured. The rear box, 11, is provided with a pipe, 15, which is for the purpose of corn nectingwith some air-forcing machine-such as a blow-fan-wherehy air under pressure will be delivered to the said rear box and caused to traverse through the air-heating tubes into the front box, 12, which latter is pro brick wall of the furnace into the;lowerpo1# tion of the furnace-chamber 1, in such mannernately-arranged pillars, 19, of some-refractory.

material-such as fire-brickbuilt vertically on the top of the bridge-wall, and joined tothe top wall, 6, of the furnace, the object of such pillars being to intercept and laterally deflect the flame issuing from the burner and cause itto spread so as to pass downwardly upon the material on the hearth in an extended stream of a width approximately that of the furnace. The waste heat and flame of the burner pass through the throat 8 into the vertical flue 4, and strike the'arch or wall at the top thereof, which directs the heat and flame horizontally in a rearward direction between and around the tubes 13, which arethus highly heated, as well as the air' contained therein, thereby utilizing the waste products from the furnace-heater to accomplish this important office. The boxes 11 and 12 constitute air-receivin g chambers, and, with the 7 vided with a pipe, 16, extending through the tubes, are supported horizontallyin the chamber 5 by any suitable contrivance'-sueh,for' example, as a plate, 20, connected with the furnace-walls.

Iii practice either of the air-receiving'chambers can be connected with the air-forcing machine, the other chamber being of course placed in communication with the furnacechambcr. V

The construction of hydrocarbon burner may vary and any well-known one used; but I prefer to employ that here illustrated,which is constructed in accordance with the invention forming the subject-matter of my application for Letters Patent filed January, 1883, in which the burner is composed of an oblong casing having a perforated side wall and a line of perforations along its top and bottom walls, and a vapor or gas supply pipe extending into the casing and terminating at or near the center thereof in lateral branches, so that the vapor or gas is uniformly distributed in the casing and burned at the perforations in the latter. The air from the air-heating apparatus, being impelled by an air-forcing machine, is delivered to the furnace-chamber under pressure, and hence in passing around the burner it strikes the burning gas with force and drives it against the refractory pillars, creating a strong current, and delivering a streaming flame of great intensity upon the material on the hearth. v

I do not confine myself to the location of the burner on the bridge-wall, as it could be oth erwise arranged and supported adjacent to such bridge-wall. I am aware that it is not new to utilize the waste heat in a metallurgic furnace for heating air forced through a series of pipes located at one end of the furnace in the path of the waste heat and connected with the coinbustion-chamber of the furnace, to supply the same with heated air under pressure and effect complete combustion of the gases. Such, therefore,.I do not broadly claim.

Having thus described my invention, what I claim is- 1. The combination of a furnace having a rear furnace-chamber, a hearth, a front flue, and a waste-heat-receiving chamber located over the top wall of the furnace and having its front end indirect communication with the front furnace-flue, with the two air-receiving chambers located in the rear part of the wasteheat-receiving chamber, the air-heating tubes each having its ends connected, respectively, with the two air-receiving chambers, apipe connecting one of said chambers with the rear furnace-chamber, and a pipe for connecting the other of said chambers with air-forcing mechanism, substantially as described.

2. The combination of a furnace having a rear furnace-chamber, a bridge-wall, a hearth, a front flue, and a waste-heat-receiving chamber located over the top wall of the furnace and having its front. end in direct communication with the front furnace-flue, with the two air-receivin g chambers located in the rear part burner located upon or adjacent to the bridgewall of the furnace, whereby a blast of air from the air-heating tubes is delivered upon or around the burner, substantially as described.

3. The combination of the furnace having the rear furnace-chamber, a bridge-wall, the alternating refractory pillars built from the top of the bridge-wall to the top wall of the furnace, the waste-heat-receivin g chamber, the air-heating apparatus therein, two pipes, one connecting the air-heating apparatus with the rear furnace-chamber and the other for connecting with an air-forcing mechanism, and a hydrocarbon-vapor burn er located horizontally at the top of the bridge-wall in rear of the alternating refractory pillars, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILLIAM H. BROOKS.

Witnesses:

J. A. RUTHERFORD, A. H. NORRIS.

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