US1767817A - Furnace - Google Patents

Description

June 24, 1930. A w s l H ET AL 1,767,81" 7 FURNACE Filed Aug. 12, 1921 2 Sheets-Sheet 1 I I I mvsu'ronsl June 24, 1930. w, n- ET AL FURNACE 2 Sheets-Sheet 2 Fi led Aug. 12, 1921 i uvzmon.

Patented June 24, 1930 UNITED STATES PATENT OFFICE ALBERT W. SMITH AND RICHARD IB. JONES, OF YOUNGSTOWN, OHIO FURNACE Application filed August 12, 1921. Serial No. 491,716.

Our invention relates to heatin furnaces, and particularly to open hearth .urnaces.

An object of our invention is such a furnace wherein the fuel is mixed and directed into the combustion chamber by differences in velocity and pressure of constituents of the fuel.

A further object of our invention is such a device which is simple in construction and easg to operate.

further object of our invention is the provision of means whereby the products n combustion may be readily removed from the furnace during the operation of the same.

Further objects will be apparent upon reading the following description taken in connection with the accompanying drawings, in which Figure 1 is a sectional elevation of a furnaoe embodying our invention;

Figure 2 is a section on the line IIII of Figure 4;

Figure 3 is a section on the line III-III of Figure 2, and

Figure a is a section on the line IV--IV of Figure 3.

The furnace shown in the drawings comprises the usual hearth 1, gas uptakes 2 and 3 and air uptakes 4 and 5. The gas and air pass throu h the usual regenerators 6 and 7 in a well own manner. The furnace is provided with aroof 8 of any desired construction and material.

A blower 9 operated by any suitable means is connected to a conduit 10 provided with a valve member'll operated by any suitable means 12. The valve member 11 is pivoted at 13. When the valve member is in the position shown, the air is conducted through the conduit 10 into and through a recuperator 14 or other suitable heating means. F mm the recuperator the air is conducted through the conduit 15 and is directed into the chamber 16, shown in Figure 2. The air issues from the chamber 16 in three jets, 17, 18, and 19. The jets 17 and 18 act to force the main volume of air which comes up through the uptake 4 over into the mixing chamber where it will be intimately mixed with the gas coming up through the gas uptake 2.

The air issuing from the jets l7 and 18 is under considerably higher pressure than the air in the uptakes and by reason of the difference in pressure and velocity of the air issuing from these jets, the main portion of air is forced into contact with the gas and is intimately mixed therewith. The air issuing from the jet 19 forces the mixture of air and gas from the mixing and partial combustion chamber into the furnace where combustion is completed. By reason of the difierence in pressure and velocity of the directing jets, the air and gas are given a rapid and intimate mixture resulting in a rapid and efiicient combustion.

Discharge ports 20 are provided near the air uptakes, as shown in Figure 2. During the period of combustion there will be no substantial movement of either combustion gases or spent gases in the discharge ports at that end of the furnace because the air jets 17 and 18 will have suificient velocity to force the main quantity of airfor combustion into the air port, and will not aspirate the burned ases from the furnace chamber back into t e air port. Furthermore, the force of the jets l7 and 18 will be sufiicient to deflect the main body of air rising from the u takes and will allow no substantial part 0 it to travel through the discharge pprts into the chamber.

The air used in the directing and mixing jet-s is supplied by a blower 9 or other suitable means, and may be directed to either end of the furnace by the conduits 10 and 15 or the conduits 21 and 22, which are exact duplicates of the conduit-s 10 and 15. In both instances the air is conducted through a recuperator 14 or other heating device. It will be apparent, therefore, that the directing and mixing air is heated by the Waste gases from the furnace to a temperature approaching that of the main volume of air and gas.

During the period that combustion is takin place at one end of the furnace, the products of combustion pass from the other combustion end of the furnace. During this period the air jets at the exit end of the furnace will not be supplied with air and the products of combustion will pass out of the furnace entirely under the control of the stack draft. There are three paths of egress for the exhaust gases. First, they dischargethrough the gas port and down. to the gas regenerative chambers through the uptakes 2 and 3, as shown in Figure 2; second, through the air port'intothe airup'takes' i and '5" down" to and through the regenerative chambers;

third, through the discharge ports am by the same path from the regenerators to the stack. No substantial amount of gases will ass through the'airjetpassagesas shown in the drawings, as these are. relatively small.

However, such passages may be increased in [area so as to ltherethrough. q

permit the gases to pass out.

.From the foregoing it a will .be noted that there are; no valves ordampers for directing the passa e of the fuel into, or the spent gases from t efurnace through, the ports..

The operation is controlled" entirely by the difference in velocity of a constituent of the fuel, and all elaborate mechanisms of water cooled dampers and valves are eliminated.

.medium These terms when used. hereinv interpreted in a broadsense.

Throughout the specification and claims wehave used the terms gas and gaseous have their physical meaning and are to be the word gas is not to be interpreted herein as meaning merely fuel gas, but in-.; cludes fuel gas, air, or any other, gaseous fluid. I

. ,Our invention has .many advantages, in

that a simple and'eflicient arrangement is provided for mixing'and directing the fuel and the spent gases; further advantages revalves and dampers andother complicated P and expensive devices-are eliminated. Many tails without side in the provision. of means whereby other advantages willv be apparent to those skilled in the art.

' While we have shown and de scribed one embodiment'of our invention, wedesire it to be understood that we are not limited to the exact arrangement shown and described,

as many changes may be made in the deeparting from they Spirit of our invention.

Weclaim; N 1. The method which consists in conducta ing gas into the port of a furnace and conductlng airinto the region of the port and subjecting the air, therein to a transverse gaseous current to direct said air into the port and mix itv andthe gas to ether and,

g to alongitudinal current for'con noting the 'mixture into a combustion and heating chamber. v

2. In a heating furnace, the combination I 4. In a heatin of twoheating c embers for the air where- "by' the airis supplied in two parts, and

For instance,

fset'our hand.

discharge ports, means for supplying a jet of gaseous medium at a velocity to direct the combustible gases into the furnace through the entering ports and prevent said ases from entering the furnace through the 'scharge ports at the intake end of the furnace.

' 3.iIn a heating the combination of a regenerative chamber and a recupera tive chamber througheach of which a part of :the fuel air jis passeds'.atflidifierent pressure and velocity.

furnace the combination means for giving. said parts different pres sures and velocities. I' f T 5.,In a. heating furnace,.the combination of air and gas entrance passages and means vfor'mixing and then idireeting'said air'and asby separate streamsof a lga'seous rne- 'um of differing velocity. f I 6. Inafurnace, a gasinlet port, an'air inlet. port adjacent thereto, 'auxiliary air ports on each side of the air inlet portlfipr effecting a mixture of the gas andfair, and

air andgas into the furnace...

anauxiliary air port for directing. mixed '7. In a furnace, thecombination with air and gas inlet ports, discharge ports connecting with said air inlet portandasupply ducttherefor, of auxiliary air ports and .means for supplying. air" thereto at such ALBERT'W. SMITH. emann. JONEJS.

of entering'gasand airports, auxiliary gas V

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