US2257931A - Smoke eliminator - Google Patents

Description

Ocft 7, 1941-` c. E. ALEXANDER SMOKE ELIMINATOR 2 Sheets-Sheet l Filed NOV. 19, 1940 A( Inventor 7%?5 /OA/awl By I omey 0ct. 7, 1941e c3. E. ALEXANDER 2,257,931

SMOKE ELIMINATOR Filed Nov. 19, 1940 2 Sheets-Sheet 2 zdf/@S f. km77/971 Patented Oct. 7, 1941 SMOKE ELIMINATOR Charles E. Alexander, Alton, llll., assigor of One-half t John E. BylleS, A111011, Ill.

Application November 19, 1940,V Serial No. 366,296 (c1. 11e-9:7)

4 Claims.

This invention relates to a smoke eliminator and heat conserver adaptable to various types of furnaces constructed to use coal as a fuel and principally bituminous coal, and has for the primary object the provision of means easy to install in a furnace and which will concentrate the gases and smoke under high temperature and increase the distance of travel thereof before reaching the smoke pipe of the furnace, so that complete burning of the' gases will be assured providing for a maximum amount of heat derived from the fuel with a substantial elimination of smoke passingfrom the furnace by way of the smoke pipe, besides retarding the passing of the heat from the furnace by way of said smoke pipe.

With these and other objects in view as will become more apparent as the description proceeds, the invention consists in certain novel features of construction, combination and arrangement of parts as will be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which Figure l is a vertical sectional View illustrating a furnace of a conventional construction equipped with the present invention and showing the smoke stack of the furnace connected to a chimney and provided with a forced draft means.

Figure 2 is a sectional view taken on the line 2--2 of Figure 1.

Figure 3 is a sectional View taken on the line 3--3 of Figure 1.

Figure 4 is a fragmentary front elevation illustrating a part of the fuel door of the furnace equipped with oxygen supply tubes.

Referring in detail to the drawings, the numeral 5 indicates as an entirety a furnace of any well known construction equipped with the usual grate E and fire door 1. The smoke pipe of the furnace is indicated by the character 8 and is shown as connected to the upper portion of the furnace and to a chimney 9. Mounted on the smoke pipe 8 is a power driven fan I0, the exhaust pipe I I of which is connected to the smoke pipe 8 adjacent the latters connection to the chimney 9. The purpose of the fan is to create a forced draft in the furnace so that the fuel will be burnt under forced draft.

An arch or dome I2 is mounted in the furnace by brackets I3 at a selected distance above the grate 6 and establishes in the furnace a fire box designated by the character A which may be supplied with fuel through the doorway normally closed by the door 1. The arch or dome I2 snugly fits the walls of the furnace and is pro'- vided with a centrally arranged opening I4 through which gases and other products of come bustio'ri of the burning coal on the grate may pass into the upper portion of the furnace. The arch or dome consists of a metallic plate `I5 and fire bricks I6 covering the upper face thereof.Y The metallic plate is concave convex in shape with the concaved face disposed lowermo'st acting to direct the rising gases and products of combus-V tion toward the opening I4 for passage therethrough and thereby concentrating the gases and products'of combustion centrally in the upper portion of the furnace.

An upwardly inclined baille or deflector plate Il is mounted on the wall of the furnace 5 a selected distance above the arch or dome and between the latter and the smoke pipe 8. The baffle or de'e'ct'orplate I1 terminates a limited distance beyond the opening I4 so that the gases and products of combustion rising upwardly from said opening will be deflected toward the side of the furnace having the fire door and away from the entrance to the smoke pipe, consequently requiring the gases and products of combustion to travel a greater distance before reaching the smoke pipe and within a concentrated area designated by the character B and termed a combustion chamber.

A baffle I8 is mounted on the furnace directly above the fire door 'I for pivotal movement and may be sustained in any of its adjusted positions by a suitable means indicated by the character I9 arranged exteriorly of the furnace. The baffle I8 terminates in a plane below the upper end of the baille or deflector plate I1. It is also to be noted that the baffle I8 inclines downwardly over the fire door which is equipped with tubes 20 for the admittance of air to the combustion chamber which assists in the burning of the gases and products o-f combustion therein.

The directing of the gases and products of combustion from the burning fuel to the center of the furnace by the arrangement of the dome or arch I2 and the passing of said gases and products of combustion centrally into the combustion chamber will assure the burning thereof under a high temperature and consequently assure the complete consumption to substantially eliminate smoke passing from the furnace by wayv of the smoke pipe.

The arrangement of the deector plate Il and the baffle I8 will retard or slow up the passing of heat from the furnace by way of the smoke pipe, consequently permittingv a maximum amount of heat to be derived from the burning fuel Within the furnace.

'I'he baille or deector plate I'l consists of a metallic plate element 22 supporting on its upper face re bricks 23.

While I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction, combination and arrangement of parts may be made without departing from the spirit and scope of the invention as claimed.

Having thus described the invention, what I claim is:

1. In combination with a furnace having a fire box and fuel door therefor and a smoke pipe connected with said furnace above the fire box, forced draft means connected to said smoke pipe, an arch mounted in the fire box and snugly fitting the walls of the furnace and provided with a centrally arranged opening to permit escape of gases and products of combustion from the burning -fuel within the fire box, said fuel door being located above and below said arch,

2. In combination with a furnace having a fire box and fuel door therefor and a smoke pipe connected with said furnace above the fire box, forced draft means -connected to said smoke pipe, an arch mounted in the fire box and snugly fitting the walls of the furnace and provided with a centrally arranged opening to permit escape of gases and products of combustion from the burning fuel within the fire box, said fuel door being located above and below said arch, vent tubes carried by said fuel door to discharge oxygen into the furnace above the arch.

3. In combination with a furnace having a fire box and fue] door therefor and a smoke pipe connected with said furnace above the lire box, forced draft means connected to said smoke pipe, an arch mounted in the fire box and snugly tting the walls of the furnace and provided with a centrally arranged opening to permit escape of gases and products of combustion from the burning fuel within the re box, said fuel door being located above and below said arch, vent tubes carried by said fuel door to discharge oxygen into the furnace above the arch, and a baffle plate mounted on one side of the furnace between the arch and the smoke pipe and inclining upwardly and terminating beyond the opening of the arch, said baille plate and arch coacting with the furnace in establishing therein a combustion chamber with the vent tubes communicating therewith.

4. In combination with a furnace having a fire box and fuel door therefor and a smoke pipe connected with said furnace above the flre box, forced draft means connected to said smoke pipe, an arch mounted in the fire box and snugly tting the walls of the furnace and provided with a centrally arranged opening to permit escape of gases and products of combustion from the burning fuel within the fire box, said fuel door being located above and below said arch, vent tubes carried by said fuel door to discharge oxygen into the furnace above the arch, and a baille plate mounted on one side of the furnace between the arch and the smoke pipe and inclining upwardly and terminating beyond the opening of the arch, said baille plate and arch coacting with the furnace in establishing therein a combustion chamber with the vent tubes communicating therewith, and a pivotally mounted baille located on the side of the furnace above the door and inclining downwardly and terminating in a plane below the upper end of the baille plate and spaced therefrom, and means for sustaining the pivoted baille in any of its adjusted positions.

CHARLES E. ALEXANDER.

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