DE1751769A1 - Gas burner construction - Google Patents

Description

Dipl.-Ing. Dipl. Oec. publ. DIETRICH LEWINSKY

PATENT ADVOCATE

8 Munich 21, July 26, 1968

eotthardstr ··· 81 · Tal «fön (OStI) Ββ17β9

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5170 / E

National Airoil Bonner Company, Philadelphia, 1284 East Sedgley Avenue (V. St. A.)

Gas burner construction

U.S. priority dated July 28, 1967 to U.S. Patent Application No. 656,858

This invention relates to gas burners, especially for raw gas, in which the gas is directed into contact with air before combustion in such a way that the gas jets are swirled.

It has already been proposed to supply combustible gas to cause combustion to be mixed with air, but the provisions for burning fuel gas at high combustion rates and with stability over a wide range have not been entirely satisfactory.

009821/1072

Hypetn. U. WttX <1Mtklt

13901

• The main aim of the invention is to create a gas burner, which is particularly suitable for raw gas in which a short flame is used with optimal yermis of gas and air and which is capable of very high heat to release. It is a further object of the invention to provide a gas burner of the aforesaid kind in which the combustion is stable both with variable feed and over a wide range, with such stability even with a large excess of air over that for combustion and with controlled and uncontrolled fluctuations the gas pressure is maintained. Another object of the invention is to provide a gas burner which is used in the Is able to operate within a wide range of pressure conditions and which does not require a distribution screen. The aim of the invention is also to create a gas burner with a flame curve that is short, stiff and well mixed. which does not wobble and flicker outward, and which is limited in diameter to the block exit diameter the refractory block to which the burner head is connected. Other objects and advantageous features of the invention result from the following description and the claims.

The desired goals are achieved by a gas burner construction in which a supply pipe for raw gas is calibrated through a ventilation slide or air duct

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extends, which is attached to a furnace wall. · The tube has a burner head which releases gas through openings into a refractory buffer block. The openings are at an angle with respect to a transverse radius and at an angle with respect to the longitudinal axis the muffle block opening so that the gas swirls and burns with a short, stiff flame before leaving of the muffle block is effected.

The essence and the characteristic features of the invention are taken from the following description in conjunction with the attached drawings, which form a part of the description, better understood. In the drawings »

Pig. Figure 1 is a view, partly in section and partly in elevation, of a preferred embodiment of one gas burner according to the invention}

Pig. Figure 2 is a vertical, enlarged sectional view taken about on line 2-2 of Pig. 11th

Pig. 3 is a vertical, more enlarged, sonic view on line 3 ~ 3 of Pig. 2y

Fig. 4 is a sectional view taken approximately on line 4-4 of Fig. 3t

Pig. 5 one of the pig. View similar to Fig. 2 but illustrating another embodiment of the invention ι "

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Pig. 6 one of the pig. 3 similar view showing the

in Pig. 5 shown embodiment of the invention illustrates ι

Pig. 7 one of the pig. View similar to Fig. 2 illustrating another embodiment of the invention.

Like reference numbers refer to corresponding parts throughout the drawings.

The invention is not limited to the exemplary embodiments shown here. As part of the invention and given the person skilled in the art various modifications without further ado.

A preferred embodiment is shown in Figs. 1-4 of the drawings. It can be a wall plate 10 with a ceramic, refractory lining 11 be provided. The wall panel 10 and the cladding 11 can be vertical, horizontal or inclined) for the purpose of veransohaullchung however, they are shown to form a horizontal wall or floor of a furnace.

The wall plate 10 has an opening 12 and it is a Muffeiblook 14 is used, which is attached to the wall plate with refractory cement 15 laid in between. The muffle block 14 has a continuous, central opening 17,

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BATH ORIGINAL

which, as shown, have a diverging, conical shape having. If the opening 17 is also shown as conical, the special, illustrated Geetalt is not like that critical. The opening 17 can be at the point against which the Flame is aligned, must be conical or cylindrical however, allow for increased block combustion and must be of sufficient volume to keep the longitudinal axial pressure drop within proper design requirements.

On the wall plate 10 is preferably a ventilation slide (register) 20 to create a regulation of the Air supply attached.

A suitable form of the ventilation slide »is the one which in US patent application ITr. 644 627 dated June 8, 1967 is shown. The ventilation slide 20 shown has a housing 21 on which an axially movable air belt arrangement 22 is attached. The tape assembly 22 has a Number of resiliently held straps 23 With curve hollowness 24t which length bolts 25 can be moved, the bolts 25 being held on the housing 21. Da «Gtehäuae 21 wears one Versohlußplatte 26 in such a way that the movement of the air belt assembly 22 as it is controlled by the Xurreneohlitie 24 the size of the air inlet opening 28 lwii above the air « belt assembly 22 and dtr plate 26

m 6 -

008821/1073>

The closure plate 26 let preferably with a sound-insulating and sound-absorbing and heat-insulating, Refractory disc 27 is provided to reduce noise transmission in order to protect the plate 26 from radiant heat and to transfer heat to the incoming air in order to preheat that air.

A raw gas pipe 30 is provided, which is centrally located extends through the Versohlußplatte 26 and at the end of the tube A nozzle or a burner head 31 is located Qf. The head 31 has an inner threaded portion 32 which is in contact with a corresponding threaded end 35 on tube 30.

The interior 36 of the burner head 31 can be designed in any customary manner in order to that which is set out below Allow basin intake.

The exterior of the burner head 31 has an outer cylindrical

. see longitudinal surface 3.7, a conical surface 38 and a flat,

transverse bottom end surface 39 * uf. The angle between the

. Bndfläohe 39 and the konisohen fläohe 38 can be in a special Ausführungsungeform in the order of 50 ° or lie.

V * to supply the gas outside the interior 36 for incineration,

iet ti «· AnMhI Bohrlöoher 40 provided. The Geeaetbereioh j <· Γ Ltfoher 40 iet dependent on the Gaedruok, where dl «number of

V 001821/1073

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Holes are sufficient and the holes are distributed around the circumference in such a way that the gas jets from them work together, to create stability. Insufficient number of holes around the perimeter leads to a loss of cooperation of rays.

In the special embodiment and with a gas pressure of about 1 atm and a heat release in the order of magnitude of 378,000 kcal per hour, 20 holes 40 with a drill No. 55 give satisfactory results.

The holes 40, viewed with respect to a plane through the longitudinal axis (see Pig. 4) are at an angle labeled "a" which is greater than 22 1/2 ° and less than 75 °. A suitable angle is 37 ί / ² °

The holes 40, viewed transversely, preferably have an ^{angle referred to as M} b "(FIG. 3), which is in the range from 30 ° to 75 °, preferably 55 ° in a special configuration. The effect of changing this angle is a change in heat release and this in turn changes the noise level, making it quieter to work at a narrower angle.

Although an economy attachment can be used if so desired, this has been omitted because it is not forms part of the invention.

009821/1072

Now the working method is explained.

Air introduced in any desired manner fritt " through the lift slide opening 28, as determined by its setting. The air flows inside the Ventilation slide 20 close up, surrounding the pipe 30. Then it flows through the opening 12 in the floor » plate 10, surrounding the head 31, and through the opening 17 in muffle block 14.

Fiohgae under pressure is fed to tube 30 and released through the openings 40 in the twist course and «Was at an angle both to a ladius in a transverse plane and at an angle to the longitudinal axis.

Gas from port 40 is against the inner surface of the Opening 17 in the muffle block 14 directed and crosses the incoming air. The combustion takes place with a short, stiff flame, which is limited transversely within the muffle block opening 17 *. The energy that comes from the pressure of the Raw gas is the main source of energy for effecting the distribution and mixing of the raw gas with the air for the burn. The increasing diameter of the opening contributes to the incineration within Block 14.

It is not necessary that the head 31 be oversized, but only for the supply pipe 30 is large enough.

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BATH ORIGINAL

The energy of the gas which exits through the openings 40, is used to achieve and maintain the sufficient, desired turbulence with ambient air and with natural draft of air. The air supplied through the ventilation slide has little energy and does not require any air propeller blades or the like. Heat releases in the range of 126,000 to 4,790,000 Each hour with different sizes and numbers of openings 40 were effected with a furnace draft in the range of 0.51 1.27 mm water column.

As regards the embodiment of the invention particularly illustrated in FIGS. 5 and 6, the embodiment of the invention there shown head 31a an outer cylindrical longitudinal surface 37a, a conical surface 38a, an outer cylindrical longitudinal surface 42 and a flat, difficult-to-close end surface 39a

Cut into the konieohe surface 38a are holes 40, which, instead of as shown in Pig. 1 to 4 close to being directed outwards, are similar in so far as it relates to the angle ^H a ^w with respect to the position in FIG. 4. However, bind the looher inwardly with an ^M b ^M designated angle, which is in the range of 90 ° to 120 °, and in a particular embodiment is preferably about 110 °.

The mode of operation is similar to that described above with the exception of the direction of the initial movement dt raw gas,

009821/1072 " ¹⁰ "

as indicated by the location of the openings 40 in the Pig. 5 and 6 is determined.

In the embodiment of the invention shown in FIG a duct 45 is provided instead of the ventilation valve and connected to a suitable source of compressed air to deliver accelerated train. The channel 45 can be inside a control throttle valve 46 for regulating the air supplied to the 7er- ^ combustion and a sieve 47 for smoothing the Have air flow, which causes a more uniform distribution around the head 31. The head 31 and the with it im Related structure is the same as that described above with reference to Pig. 1 to 4 described structure and it works in a similar way.

The burner described here is stable with a variable supply over a wide gas flow range, with little bending and with large amounts of air beyond those ψ which are required for combustion. When working takes place. no swaying or chattering.

009821/1072 bad original

Claims (6)

Patent claims: 1.) Gas burner construction, characterized in that it "" has the following features * A wall with a refractory muffle block which is attached to it, this Muffeiblook having a through opening with a delimiting surface, further means for the supply of air to this Muffeiblooköffnung as well as a gas supply pipe which extends through this means for the air supply and which carries a burner head on its inner end, this burner head having a number of gas supply openings which extend through the burner head and are directed towards said surface , and the openings are at an angle with respect to a transverse wheel of this head and also at an angle with respect to the longitudinal axis of this tube and this head. 2, gas burner construction according to claim 1, characterized in that that this first angle is in the range of greater than 009821/1072 _BA0 22 1/2 ° bie less than 75 ° iet, preferably in the Of the order of 37 1/2 °. 3. Gas burner construction naoh claim 1 and 2, characterized characterized ι that this second angle in Bereioh from 30 ° to 120 ° and in particular, measured as the cone angle, is approximately 110 °. 4. Gas burner construction naoh claim 1 to 3 »daduroh characterized in that the burner head has a conical surface at the outer ends of these openings and this burner head is mounted in such a way that the sleeve look at least partially surrounds the burner head 5. öaebrennerkonstruktion naoh Anspruhh 1 to 4 _t daduroh characterized in that the means for the air supply have a ventilation slide. 6. Gas burner construction naoh claim 1 to 4 »daduroh "marked that the means for the air supply one % ■■■ . '* Have accelerated air duct 009821/1072 BATH ORIGINAL Blank page