US1072578A

US1072578A - Gas-furnace.

Info

Publication number: US1072578A
Application number: US74066913A
Authority: US
Inventors: Paul Achille Joseph Cousin
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-01-07
Filing date: 1913-01-07
Publication date: 1913-09-09
Anticipated expiration: 1930-09-09

Description

P. A. J. GOUSIN.

GAS FURNACE.

APPLICATION FILED JAN. '1, 191a.

Patented Sept-9, 1913.

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GAS FURNACE. APPLICATION FILED JAN. 7, 1913'.

Patented Sept. 9, 1913.

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PAUL AGI-II'LLE JOSEPH COUSIN, 0F LOOS-LEZ-LILLE, NORD, FRANCE.

GAS-FURNACE.

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' Application filed January 7, 1913.

T 0 all whom it may concern I Be it known that I, PAUL ACHILLE Josnrrr Cousin, citizen of the Republic of France, residing at 8 1 Rue Faidherbe, LooslCZLlllG, Nord, in the Republic of France, have invented new and'useful Improvements in GasFurnaces, of which the following is a specification.

My invention relates to improvements in gas furnaces used for melting metals or other purposes.

One object of my invention is to provide a reducing burner formed of two vertical flues, one for the gas, located near the furnace chamber and the other for air, which are separated by a wall terminating on a level much below the point where the flues run into the furnace chamber, so that a combustion and expansion chamber is thus formed for the flame, which chamber is located below the point of introduction of the flame into the heating chamber of the furnace. By this arrangement, I am able to obtain the exact length of flame desired, to bring the part of said flame where the temperature is at its maximum to the part of the furnace chamber most convenient according to the requirements, and to insure that an excess of gas shall come into contact with the material to be treated, which aid in the reducing effect.

Another object of my invention is to com-.

bine in a furnacea reducing burner of that kind, arrangedat one end ofthe furnace chamber with oxidizing burners arranged at both sides of said chamber. By this arrangement, the flames of the oxidizing burners are directed in the furnace chamber in a direction at right angles to the reducing flame, whereby the two fluids, gas and air, of said flame are thoroughly mixed and the combustion thereof is improved. Moreover, it is thus possible to effect in the same furnace either operations which require an oxidizing atmosphere at certain times and a reducing or neutral atmosphere at other times, or operations which only require an oxidizing, reducing or neutral atmosphere, respectively, and to, obtain in all cases the temperature desired with the best conditions for a perfect combustion. I

In the annexed drawings: Figure 1 is a longitudinal section along the line 11, Fig. 2 of a furnace with lateral. oxidizing burners and a reducing burner located at one end of the furnace. Fig. 2 is "a horizontal Specification of Letters Patent.

Patented Sept. 9, 1913.

Serial No. 740,669. I

sectional View substantially on the line 22, of Fig. 1; Fig. 3 is a-similar view substantially on the line 33 of Fig. 1; Fig. 1 is a. vertical sectional view substantially on the line 41 of Fig. 1; Fig. 5 is a similar view substantially on the line 55 of Fig. 1; Fig. 6 is a similar view substantially on the line 6+6 of Fig. 1; Fig. 7 is a similar view substantially on the line 7 7 of Fig. 1; Fig. 8 is a similar viewsubstantiallyon the line 88 of Fig. 1; Fig. 9 is a similar view substantially on the line 99 of Fig. 1; Fig. 10 is a similar View substantially on the line 10-10 of Figsy2, 3, 5 and 9; Fig. 11 1s a verticalsectional view, substantially on the line 1111 of Fig. 12 of a modified 'form of invention embodying a rotary furnace having a cylindrical furnace chamber; Fig. 12 1s a similar View substantially on the line 12, 12 of Figs. 11 and 13; Fig. 13

is'a horizontal sectional view substantially on the line 13-13 of Fig. 12. s

The furnace shown inFigs. 1 to 13 has a heating chamber a in which the material to be treated is placed either in bulk or in furnace chamber a and provided with a chamber q into which gas and air are led respectively by parallel vertical flues r. s (Fig. 2) separated from eachother by a vertical transverse wall 6, the gas flue 1* being nearer the furnace chamber a. The burner chamber 9 forms with the furnace chamber a a continuous chamber having in its wall no projecting or abrupt parts adapted to form eddies, so that from the ends of the vertical flues r s, to the smoke exhaust fines 0 both currents of fluid, air and gas, remain parallel, the combustion being effected gradually along the way of the gases. As the gas is led under the air, an excess of gas ioo is kept in contact with the material treated,

whereby the reducing effect is aided. The gas isled to the flue r by a horizontal flue f (Fig. 2) from a flue cl through a regulating valve C. The air is led to the flue s by a similar flue g froma flue cthrough a regulating valveD. Each of the fines r s is lhenumber of divided into two conduits by vertical longi-. tudinalpartition: u in thegas flue r ,and o.

a mixing chamber q is formed in-which'the flames can expand. A damper 'E (Fig. 1) is provided preferably in the=back wall of the furnace for regulating the action of the reducing burner.

The furnace is also provided with oxidizing burners arranged at'both sides of the chamber a and shown as being five in number on each ,side. Each of said burners comp *ises a horizontal flue 0 which opens :intothe. chamber a and is fed with gas and air by moans'oftwo vertical .parallel lines F -G respectively, said flues being in'ithe sainc transverseplane of the furnace. The current of air is thus deflected at right angles in its passage from'the flue G to the flue 0 so.that the two currentsof air and gas flow in perpendicular directions at the point where they meet, where ignition occurs. Anexcess of air is necessary for obtaining an oxidizing action. The flames thus obtained are short and very hot; they are directed transversely through the furnace chamber a. if the burners 0 are placed suflieiently near to each other,the flames thereof meeteach other vin the direction of the length of the furnace and are mixed and stirredtogether which aids inobtaining a rapid and complete combustion. Dampers H (Fig. permit of regulatingeach ofthe oxidizing burners separately.

The gas flues F (Fig. 10 .are in communication at the bottom with horizontal flues F connected by vertical flues F with lower longitudinal horizontal flues jto which air is fed from the flues (Z through .valves h. The air flucs G are in communication by flues G similar to F and vertical flues G similar toF .with longitudinal horizontal flues i to which air is fed from the flue 6 through valves is. d

The gas may betaken directly from the gas producer or other convenient source or heated in a regenerator; it is led :by a flue (Z (Figs. 1, 2) to the transverse flue (Z carrying'the valve C and both valves it. The heated air coming from the regenerator is led to the valve carrying flue e by a similar flue 6 (Figs. 1, 2). The regenerators maybe arranged under the furnace and serve as a foundation for the same. The smoke escapes through thelateral.openingso (Fig. 4L) and the two vertical fines p which communicate 'by means of transverse horizontal flues K with a longitudinal horizontal flue L (Fig. 2) wherethe smoke is collected and led into a flue hl'leading to the stack not shown. At thepoint where-both flues K run into the longitudinal flue L, the latter is provided with a vertical longitudinal partition N by which direct communication between the fines K is prevented and the draft made more unifornron both sides of the furnace whatever the location ofthe-stack may be. Two dampers P (Fig. 4) are provided in the vertical flues p on both sides ofthe'furnace. It is thus possible to reduce at will the section of passage of the smoke through said flues and to entirely out. off the'furnace from the stack when the furnace is stopped, as

shown in Fig. 4.

lVhen the furnace is used :for melting metals and isnot-wor-ked continuously, the combination of the reducing and oxidizing burners has special advantages as the beginning of-anoperation is difflcult because the furnace chamber is given opportunityto cool-between operations; the oxidizing burners, either-alone or in combination with-the reducing burner permit the furnace to be then heated rapidly while the reducing burner is only keptworking in normal conditions and particularly at the end of the melting operation when :any oxidation which would be detrimental to the quality of the metal obtained must be avoided. When the :furnace is operated without interruption, the oxidizing burners may be omitted. 1

Referring to the modified form of inven- :tionillustrated in Figs. '11 .to 13, at designates the cylindrical furnace chamber to which the air and gas pass from=thechan ber .9 said chamberibeing provided with the tapping opening at The air and gas pass to the chamber 9 from the

flues

3 and 1" respectively, which communicate with the horizontal e'fluesg and f respecstively. A is alblock orplate removably inserted in the back wall of the furnace to permit access to thelinterior, for purposes of repair and the ilike, and B designates a suitable manhole formed .in the back wall of the furnace. %E designates a damper adjacent the :reducing burner for regulating the actionthereo'f; 'P designates an addi- .tional damper in verticalflues 79 leading to the smoke escape flues 0 and K designates a' transverse horizontal smoke escape flue in the base of the furnace. The operationofthe modified form of-the invention is substantially :the same as that-of the preferred form and requires no additional de scription.

Having nowdescribedmy invention, What 130 ;I claim as new and desire to secure by Letters Patent is 1. Ina furnace incombination, aheating chamber, two parallel vertical flues,

7 at its upper end with the heating chamber,

substantially as described and for the purpose set forth.

2. In a furnace in combination: a heating chamber, parallel vertical flues in communication with one end of the heating chamber, means for leading a combustible gas to one of said flues, means for leading air to another of said flues, vertical flues. arranged at the sides of the heating chamber, said flues being arranged in pairs in transverse planes, a horizontal flue connecting both flues in each pair at the upper end and opening into the heating chamber and means for supplying air to one of the flues in each pair and a combustible gas to the other flue, substantially as described and for the purpose set forth. I

3. In a furnace, in combination: a heating chamber, parallel vertical flues located at one end of the heating chamber, means for leading a combustible gas to one of said flues, means for leading air to another of said flues, an expansion chamber into which the said flues open at one end and in communication at the other end with the heating chamber, vertical flues arranged at the sides of the heating chamber, said flues being arranged in pairs in transverse planes,

a horizontal flue connecting both flues in each pair at the upper end and opening into the heating chamber and means for supplying air to one of the flues in each pair and a combustible gas to the other flue, substantially as described and for the purpose set forth.

4-. In a furnace in combination: a heating chamber, two parallel vertical flues located at one end of the heating chamber one of said flues being immediately adjacent said chamber, means for leading a combustible gas to the vertical flue adjacent the heating a chamber, means for leading air to the other vertical flue, an expansion chamber into which the said flues open at one end and in communication at the other end with the heating chamber, vertical flues arranged at the sides of the heating chamber, said flues being arranged in pairs in transverse planes, a horizontal flue connecting both flues, in each pair at the upper end and opening into the heating chamber, means for supplying air to one of the flues in each pair and PAUL AGHILLE JOSEPH COUSIN.

Vitnesses:

PH DE BEIR, RENE DUBAR.

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