US1341643A - Assiguos - Google Patents

Description

W. M. HOFFMAN.

FUEL OIL BURNER.

APPLICATION FILED NOV. 22, 1919.

Patented June 1, 1920.

UNITED STATES PATENT oer-ace.

WILLIAM M. HOFFMAN, OF BUFFALO, NEW YORK, ASSIGNGR TO HOFFMAN PRODUCTS CORPORATION, OF BUFFALO, NEVT YQRK, A CORPORATION 05 NEW YORK.

FUEL-OIL BURNER.

Specification of Letters Patent.

Patented June 1, 1920.

Application filed November 22, 1919. Serial No. 339,856.

To all whom it may concern:

Be it known that I, WILLIAM M. Horr- MAN, a citizen of the United States, residing at Buffalo, county of Erie, State of New York, have invented a certain new and useful Improvement in Fuel-Oil Burners, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawmgs, which form a part of this specification.

My invention relates to fuel oil burners and their method of operation. The object is to provide a fuel oil-burner for the utilization of the cheaper, heavier hydro-carhens in which superheated steam is mixed with the volatilized hydro-carbon and oxygen in order that a more nearly perfect combustion may be the result.

The device here shown is an improvement on the devices described in the several previous applications filed by me on hydro-carbon burners of similar type. Such cases being application filed April 1, 1919, Serial No. 287,489; application filed May 26, 1919, Serial No. 299,816; application filed Aug. 6, 1919, Serial No. 815,599. The improvement consists in the provision of a steam supply and circulating system, which will furnish a constant desired quality of steam to the nozzle which directs a steam jet into the combustion chamber and is so constructed and arranged as to insure against the flooding of the burner through the nozzle.

The figure is an elevation of the apparatus partly in cross-section.

b is the fuel oil tank which supplies fuel in quantity as may be desired through a conduit 6 to the burner. A valve 7 may be provided in the conduit 6 to regulate a flow of oil therethrough. The burner is divided into two compartments, the lower one consisting of an oil pan 6 which is sepa-.

rated from the upper compartment or combustion chamber 6 by means of a perforated partition. These perforations in the partition are provided in order that oil may pass from the lower compartment to the upper one and are in such number as may be desired, one being indicated as 6 The lower part of the combustion chamber 6 may be filled, as here shown, with an absorbent refractory material, such as asbestos. Projecting upward through the combustion chamber and coaxial therewith is a nozzle al disposed for the projection of a ct of steam into the mixing chamber. Superimposed over the combustion chamber 6 and supported by radially-extending ribs or fins b is a mixing cone 0. This mixing cone 0 is provided with a hollow wall 0 adapted to serve as a steam-generating chamber. The combustion chamber flares outward and upward as-at Z), immediately beneath the mixing cone 0 so as to provide a circumferential passageway to the combustion chamber through which air will be drawn to the burning fuel in 6 An elevated water reservoir supplies through a conduit (0 Water to the steam-generating chamber 0 at the lower level of said chamber. This water supply may be regulated by means of a valve 9. At a higher level than the water level in such reservoir a is a steam reservoir d. This steam reservoir (Z is provided with communicating means leading to the reservoir 60. Reservoir d communicates with the upper portion of the steam generating chamber 0 by means of a conduit 0 A head of steam is thus maintained in the steam reservoir and in the water reservoir. A conduit 6Z2 leads from the steam reservoir. d to the nozzle 03*. This conduit may likewise be provided with a valve h for regulating the flow of steam therethrough.

Fuels used in hydro-carbon burners of this type are of low grade, streaky and of widely varying quality. An irregular, flashy combustion is the normal result. To overcome these disadvantages, T sought in the devices described in my previous applications to inject a jet of steam into the combustion chamber to there mix with the products of combustion and to provide means for insuring a steady flow of a constant qu ality and quantity of such steam. Though the operation of these devices met with considerable success, yet to insure their most efficient usefulness, the oversight of an attendant was necessary; the quality as well as quantity of vapor supplied to the nozzle would vary and vary directly with the degree of combustion produced in the burner. At times, under a widely varying fuel supply, the burner would be flooded with water. To insure against these defects, the present system of steam circulation was provided and constitutes the improvement and novelty of the present invention.

The source of steam supply for the nozzle here located above any possible water level and the flooding of the burner thus becomes impossible. Further, the steam-communicating means between the nozzle and the steam reservoir is so disposed with reference to the combustion chamber that steam passing therethrough will be superheated before it reaches the nozzle. It will be apparent that steam passed directly from the steam reservoir would be heavy and carry a considerable quantity of water particles and to produce a dry, hot jet of steam at the nozzle, the heating thereof would be necessary.

What I claim is:

1. In an article of the class described, a combustion chamber, a steam generating chamber, a source of water supply, a conduit between said source of water supply and said steam generating chamber, steam reservoir located. at a higher level than the water level of said source of water supply and communicating therewith, a nozzle disposed for projecting steam into said combustion chamber, a conduit between said nozzle and said steam reservoir, said conduit passing through said combustion chamber. 2. In a fuel oil burner, a combustion chamber, a steam generating chamber, a water reservoir, a water passageway between said reservoir and said steam generating chamber, a steam reservoir located at a higher level than the water level of said water reservoir and communicating therewith, steam communicating means between said steam generating chamber and said steam reservoir, means for projecting a jet of steam into said combustion chamber, a conduit between said jet projecting means and said steam reservoir, said conduit passing through said steam generating chamber.

3. In a fuel oil burner, a combustion chamber, a steam generating chamber, an elevated Water reservoir, water communicating means between said reservoir and the lower part of said steam generating chammane-4s her, a steam reservoir located at a higher level than the water level in said water reservoir, steam communicating means between said steam reservoir and the upper portion of said steam generating chamber, a nozzle disposed for projecting a jet of steam into said combustion chamber, steam communicating means between said nozzle and said steam reservoir, said steam communicating means passing through said combustion chamber, and said steam generating chamher.

4. In a fuel oil burner, a combustion chamber, a steam generating chamber, a water reservoir, water communicating means between said water reservoir and said steam generating chamber, a steam reservoir located at a higher level than-the water level of said water reservoir, steam communicating means between said steam reservoir and said Heam generating chamber, means for pro ccting a jet of steam into said combustion chamber, a conduit for conducting steam from said steam reservoir to said jet pro jecting means, means for heating said conduit.

5. In a fuel oil burner, a combustion chamber, a steam generating chamber, a rater reservoir, water communicating means between said reservoir and said steam generating chamber, a steam reservoir located at a higher level than the water level of said water reservoir and communicating therewith, steam communicating means between said steam reservoir and said steam generating chamber, a nozzle disposed to project a jet of steam into the combustion chamber, steam communicating means between said nozzle and said steam reservoir, slid communicating means so disposed with reference to the combustion chamber that the steam passing therethrough will be superheated before it reaches the nozzle.

In testimony whereof I sign this specification.

IVILLIAM M. HOFFMAN.

Images