US1697549A - High-pressure gas burner - Google Patents

Description

Jan; 1, 1929. 1,697,549

F. woLFF HIGH PRESSURE GAS BURNER Filed Feb. 14, 1927 Patented Jan. 1, 1929.

UNITED STATES FRIEDRICH WOLFF, 0F BERLIN, GERMANY..

HIGH-PRESSRE GAS BURNER.

Application filed February 14, 1927, Serial No. 168,193, and in Germany December` 15, 1925.

This invention relates to improvements in the well known type of burners t operatlng with gas under pressure, in which ithas been heretofore practiced to provide a core located in the interior of a chamber surrounded by the flow of the gas. This gas is discharged or projected from a large number of openings which are arranged circularly in a plate. 'Io produce a perfect mixture between the gas and the air drawn in by suction through such projected gas, the air is drawn into the mixing chamber which surrounds the core, it has been heretofore usual to mount a body at the entrance and in the centrefof the delivery space and surrounded by the said holes or slots, the said body being so proportioned that the sectional area between it and the walls of f the mixing chamber increases progressively away from the delivery space.

The present invention refers to a further constructional improvement in high pressure gas burners ofthe foregoing type designed to obviate a serious drawback, namely that the injector action of the gas jets is not sufficiently powerful to draw in enough air for the complete combustion of the gases.

According to the invention the admission of the air or additional air for combustion is effected not as hitherto only through a ring shaped space surrounding the gas jets but also at the saine time through an inner ring shaped space surrounded by the gas jets.

By the foregoing means while still securing a complete mixing of the gases with the air or additional air for combustion, the drawback `is obviated of an insufficient admission of air even in the case of burners of the largest dimensions.

The accompanying .drawing shows a longitudinal axial section of a burner constructed according to the invention. 4

1 is the casing, with a support 2 for the ad' mission of gas. under pressure and having a ring shaped outlet plate 3, which is provided with slots or perforations 4 for the formation of the separate gas jets.

The admission of air for combustion or of additional air is produced by the injector action caused by the gas jets emerging into a cylindrical space surrounded by a diffuser'. This admission takes place primarily through an outer annular opening 5 which is bounded by the diffuser 11.

VThere is also an inner air admission pipe 12 with respect to which the filling body or core l0, together with the plate 10', are adjustable, as for instance by means of a screw threaded rod 13. In this way there is forlned between the base plate 10 and the end of the inner air passage 12 which may be provided with a bush 14: having a conical surface, an inclined outwardly extending ring shaped or annular opening 15. Out of this opening air passing through the tube 12`is drawn, for instance by the injector action or sucking effect of the Vgas jets and the air therewith into .the mixing chamber, which mixture enters between the filling body or core 10 and the diffuser sleeve 11, the admission taking place around the v base ofthe core at an angle to the direction of the gas jets and to that of the air entering v through the outer ring shaped opening, 5, as will lbe apparent. By thus providing means for the introduction of the air for combustion not only from the outside but also through the annular space 5 and from the inside through the annular slot 15, the core l0 may be reduced in length. This reduction can be resorted to because the negative pres sure prevailing between the jets of gas upon introducing air through an outer ring space is eliminated owing to the simultaneous introduction of air through the inner annular opening. The additional air passing through Hthe annular opening 15 and also through the outer annular opening 5 makes it possible even with burners of very large dimensions to attain a complete combustion and introduce a sufficiently large quantity of air even though they work with great quantities of gas and produce a thorough intermixture of the air with the gas jets.

In this way a volume of air sufficient for perfect combustion is ensured under all conditions even in the case of burners of large size while maintaining perfect mixture between the air and combustible gases.

In the case of the construction illustrated in the drawing the diffuser sleeve 11 is connected by means of radial ribs 1lal to the filling body 10 so as to form a unit therewith, the result being that the filling body and the diffuser sleeve are adjusted together by means of the screw threaded rod 13, whereby simultaneous regulation of the cross sectional area forthe admission of the inner and outer additional air may be effected.

What I claim and desire to secure by LetnmV ters Patent of the United States of America ment and an outlet plate in the said outlet is opening of the casing, spaced from the inner 1. A gas burner of the class described havend of the diuser and having jet openings. ing a diffuser, a conical member extending 2. A gas burner as claimed in claim 1 in 15 5 through and spaced from the diffuser, means which said conical element yis provided with to admit air to the inner end of. the djuser radial ribs connecting the same to the diuser and between the same' and said conical eleand also including means for adjusting said ment, a casing having an` inlet for gas under conical element and hence also said diffuser rassure and also havinga gas outlet spaced aXmlly: v 20 10 rom the base of said conical element, a duct In Wltness whereof I aiiix my signature.

to admit air to the base'of said conical ele- FRIEDRICH VVOLFF.`

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