US1291725A - Gas-burner. - Google Patents

Description

E. M. BASSLER.

GAS BURNER.

APPLICATION FILED MAYI. 1911.

Patented Jan.21,1919.

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E. M. BASSLER.

GAS BURNER.

APPLICATION FILED MAY 7. 19m.

E. M. BASSLER.

GAS BURNER.

APPLICATION FILED MAY 1.1911.

Patented Jan. 21,1919.

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GAS BURNEIL APPLICATION FILED MAY 7. 19:1.

Patented- J an. 21, 1919.

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EDWIN M. BASSLER, 0F MILWAUKEE, WISCONSIN.

GAS-BURNER.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Application filed May 7, 1917. Serial No. 166,907.

To all whom it may concern Be it known that I, EDWIN M. BASSLER, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Improvement in Gas-Burners, of which the following is a specification.

This invention relates to gas burners and relates particularly to burners particularly designed and adapted for heating regenerative furnaces or stoves such as are in general use for heating the air supplied to blast furnaces.

As is well known to persons skilled in the smelting of ores, the air supplied to the blast furnaces is heated before being delivered thereto by passing it through regenerative furnaces or stoves which, in turn, are heated by combustion of the unconsumed gases which are discharged from the blast furnace in operation.

Heretofore, so far as I am aware, the practice has been to discharge the gases escaping from the furnace through a pipe or flue which communicates with said blast fur nace adjacent to its top and which terminates in what may be described as a nozzle which discharges into the admission opening of the combustion chamber of a regenerative stove or furnace, the blast of gas discharged from said pipe into said admis sion opening operating by induction, to draw in air to produce combustion within the combustion chamber of said regenerative stove or furnace. In accordance with the former practice, the cycle in the smelting of ores, has been about three (3) hours on gas for heating the regenerative stove or furnace and one (1) hour on air to be supplied to the blast furnace. Thus, to operate the blast furnace continuously, four fully equipped regenerative furnaces are required, three of which are being heated while the fourth is being used for heating the air supplied to the furnace.

I have discovered that the efficiency of the regenerative furnace may be greatly 1ncreased by supplying both the waste gases from the furnace and the air to said regenerative furnaces under forced draft and in such manner that the air and gas will be thoroughly intermingled and the quantity of air may be regulated as required to produce perfect combustion of all of the gas delivered into the regenerative stove or furnace. To provide for delivering both the air and the gas to the regenerative stove or furnace under controlled forced draft, I have invented an improved form of burner, consisting of two fans or blowers, preferably driven by means of a common motor, the intake of one of said blowers being connected to the pipe or flue through which the gases are discharged from the blast furnace and the intake of the other fan or blower being open to the air. To effect a thorough mixing of the air and gases supplied by said fans, the discharge opening from the gas fan or blower, preferably in the form of a pipe section or nozzle of desired length, is inclosed by a hood which, in turn, is connected by suitable pipe connections with the discharge opening of the air fan or blower and which is provided with a discharge pipe or nozzle which surrounds the discharge pipe or nozzle from the gas fan or blower and is connected directly to the admission opening to the combustion chamber of the regenerative stove or furnace, said air discharge pipe or nozzle being concentric with and of greater diameter than the gas pipe or nozzle and the sides thereof converging or tapering outwardly, whereby the blast of air from said hood will be directed inwardly into the blast of gas from the gas blower and a tl1orough intermingling of said air and gas effected. Also, in order to provide for regulating the quantity of air so as to obtain the proper proportions of air and of gas to produce perfect combustion of all of the gas under different conditions, means are provided for regulating the quantity of air supplied to the burner by the air fan or blower, said means consisting preferably of a suitable gate or valve in the pipe connecting said air blower with the hood surrounding the gas discharge nozzle of the gas blower.

Practical tests in actual use have shown that by the use of my improved burner, the time required for heating the regenerative stove or furnace is reduced from three (3) hours to two (2) hours and that the period during which said regenerative stove or furnace will effectively heat the air supplied to the blast furnace-in a furnace for smelting iron oreis increased from one (1) hour to two (2) hours, thereby doubling the capacity of said regenerative stoves or furnaces so that two (2) will do the work for which four (4:) have been required heretofore, and rendering it possible to dispense with two (2) of said regenerative stoves or furnaces and correspondingly reducing the original cost and upkeep thereof, which is very considerable due to the larger size of said regenerative stoves or furnacesa usual size being about 100 feet high by 25 feet in diameter, and the linings and checker work thereof requiring to be renewed from time to time due to the excessive temperatures under which they are operated.

In the accompanying drawings, in which my invention is fully illustrated, 1

Figure 1 is a view of my improved gas burner from the position 11 of Fig. 2.

Fig. 2 is a top plan view thereof.

Fig. 3 is a sectional elevation of my improved burner on the line 33 of Fig. 2.

Fig. i is a sectional view on the line l% of Fig. 2; and

Fig. 5 is a front view of the burner proper from the position 55 of Fig. 2.

Referring now to the drawings, my 1mproved burner comprises two fans or lowers designated, respectively, A and B. As shown, said fans or blowers are of the well known type known as centrifugal fans or blowers and will be readily understood by persons familiar with this art from an examination of the drawings and without any description thereof in detail. I do not, however, desire to limit myself to the use of the particular type of fan or blower used, as my invention contemplates the use of any suitable or approved type of fan or blower.

Said fans A and B are mounted in spaced relation on a foundation indirated at C, and the power for driving them is furnished by a motor, preferably an electrical motor, D, mounted between said fans, the armature shaft of which extends into the casings of both fans and the fan runners or impellers a and I) being secured directly thereto, thus insuring that they will be driven at the same rate of speed.

Connected directly into the intake of the fan A is a pipe E, which we will assume is the downtake pipe of a blast furnace through which the waste gases from said furnace are discharged, and the discharge from said fan consists of a pipe section or nozzle. (4 which, as shown, is directed into the admission opening f of a regenerative stove or furnace indicated at F.

The intake of the fan B is open and communicates directly with the atmosphere, the discharge opening from said fan or blower B being connected by a pipe I) with a hood G which surrounds and incloses the discharge pipe or nozzle 0, of the fan A and which comprises a tubular extension 9 which is connected by a tight joint to the admission opening 7 of the regenerative stove or furnace F. The end of the discharge pipe or nozzle a of the blower A preferably terminates somewhat inside of the end of the tubular extension 9 of the hood G, said extension 9 being preferably concentric with the discharge pipe or nozzle a and the sides of said extension 9 preferably converging outwardly, whereby the air discharged through said extension 9 will be directed inwardly into the current of gas discharged from the pipe or nozzle a, thereby efiecting a thorough intermixture of said air and gas.

The quantity of air supplied to the burner is adapted to be regulated by means of a ate or valve, indicated at I, in the air pipe 3, thusproviding for regulating the quantity of air supplied to the burner in order to properly proportion the quantities ofair and gas necessary to effect perfect combustion of the gases. My invention contemplates the use of any desired or approved type of gate or valve I, of which there are several different makes available for the purpose. Said gate or valve need not, therefore, be described in detail.

Practically the same results will be obtained by connecting the intake of the blower B with the gas supply pipe E and leaving the intake of the blower A open to the atmosphere, the only difference being that the air would be discharged inside of the gas from the hood G. T he same apparatus could be used without change for both installations and skilled mechanics could readily make the necessary pipe connections for either formof installation. Obviously, therefore, said alternative installations in volve no departure from my invention and having described one thereof, the other will be readily understood without additional illustration or description in detail.

Also, I desire itto be understood that the discharge pipe a of the fan A may be made of any length desired to meet different requirements, thehood Gr always being positioned with reference to the discharge end or nozzle thereof. In other words, by'making said discharge pipe a ofproper length, the blowers A and B may belocated at any desired distance from the point where conibustion takes place.

I claim 1. A burner comprising blowers, the intake of one of which is adapted to be'connected with a source ofgas supply and of the other withthe atmosphere, a pipe connected to the discharge opening of one of said blowers, a hood which incloses the discharge end of said pipe providedwith a dis charge opening which alines therewith, a pipe which connects'the discharge opening of the other blower with said hood, and means for operating said blowers, substantially as described.

2. A burner comprising blowers, the intake of one of which is adapted to be. connected .with a source of gas'supply and of the other with the atmosphere, a pipe connected to the discharge opening of one of said blowers, a hood which incloses the discharge end of said pipe provided with a discharge opening which alines therewith, a pipe which connects the discharge opening of the other blower with said hood, means for regulating the relative quantities of air and of gas supplied to said burner, and means for operating said blowers, substantially as described.

3. A burner comprising blowers, the intake of one of which is adapted to be connected with a source of gas supply and of the other with the atmosphere, a pipe connected to the discharge opening of one of said blowers, a hood iwhich incloses the discharge end of said pipe provided with a discharge opening which alines therewith, a pipe which connects the discharge opening of the other blower with said hood, a valve .which controls said air supply pipe, and means for operating said blowers, substantially as described.

4. A burner comprising a first blower the intake of which is adapted to be connected with a source of gas supply, and a second blower the intake of ,which communicates with the atmosphere, a pipe connected to the discharge opening of the gas blower, a hood which incloses the discharge end of said pipe provided with a discharge opening which alines therewith, a pipe which connects the discharge opening of the air' blower with said hood, and means for operating said blowers, substantially as described.

5. A burner comprising blowers, the intake of one of which is adapted to be connected \with a source of gas supply and of the other with the atmosphere, a pipe connected to the discharge opening of one of said blowers, a hood which incloses the discharge end of said pipe provided with a discharge opening which alines therewith, and the sides of which converge outwardly, and a pipe which connects the discharge opening of the other blower with said hood, and means for operating said blowers, substantially as described.

6. A burner comprising blowers, the intake of one of which is adapted to be connected Iwith a source of gas supply and of the other with the atmosphere, and a motor for operating said blowers, said blowers and motor being mounted in transverse alinement with said motor between said blowers and the armature shaft of said motor extending into the casings of said blowers, and the runners or impellers of said blowers being secured to said armature shaft, a pipe connected to the discharge opening of one of said blowers, a hood which incloses the discharge end of said pipe provided with a discharge opening which alines therewith, and a pipe which connects the discharge opening of the other blower with said hood, substantially as described.

In testimony that I claim the foregoing as my invention, I afiix my signature this 21st day of April, 1917.

EDWIN M. BASSLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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