Title of Invention

"A GRAVITY FED OIL FIRED BURNER"

Abstract This invention relates to a gravity fed oil burner comprising a burner block (4) for receiving oil from an oil storage tank (1) disposed at an elevation above said burner block (4) wherein the said burner (4) is mounted centrally on said convergent divergent air nozzle (8) and the location of top edge of the burner block (4) with respect to the convergent divergent nozzle (8) can be adjusted for desired supply of aspirated air and shape of the flame; a first pipeline (3) for delivery of oil to the burner block (4) via an oil entry port (9); and an atomizing nozzle (9') being provided in the burner block for supply of an atomizing medium via a second pipeline (3); wherein isolating/regulating valves are provided in said first and second pipelines (3,3') for isolating and regulating respectively the oil flow into the burner block (4) and atomizing medium flow to an atomizing stub (5).
Full Text FIELD OF INVENTION:
The present invention generally relates to a gravity fed oil fired burner capable of carrying out combustion without fuel oil pressuring pump, combustion air blowers, atomizer tips and air swirlers. In particular, the invention relates to a method and apparatus for generating a vertically upward firing configuration without using oil pump.
PACKGROUND OF THE INVENTION;
Increasing incidents of forest fire is today's concern from environmental degradation and ecological imbalance point of view. One of the reasons identified is the usage of coal fired steam locos in mountain railways as the hot ash or burning particles spread to the dry vegetation in the forest while emptying the ash pan. Also, hot burning coal particles from the chimney of steam loco contribute to the forest fire. Hence most of the mountain railways in the world have switched over from coal firing into oil firing.
The requirement of mountain railway is that the cabin/engine shall not have diesel genset motor and other electrical gadgets and associated control system.
The lesser electrical/other gadgets and avoidance of control system components will simplify the operation of the steam loco and the loco driver can concentrate more on the track. This led to the present invention of "An oil burner working without oil pump*.
Many industrial applications require large-scale generation of heat from burners for process heaters, boilers, or other fired heating systems. Various types of burners are available world wide for industrial applications. Generally compressed air or steam is used for atomizing oil particles and blowers/fans are used to supply the combustion air. However, there are many applications where there are limitations in employing blowers and pumps due to various reasons.
SUMMARY OF THE INVENTION;
One object of the present invention is to provide a burner system which works without any externally driven/assisted oil pump.
Another object of the present invention is to provide a gravity fed oil burner which operates without the requirement of any electrical power both during start up and operation.
Yet another object of the present invention is to provide a combustion system which does not require an externally driven/assisted air blower for combustion air.
A still further object of the invention is to provide a combustion system which is adaptable to generate vertically upward flame configuration for better improved combustion.
These objects are achieved by having an oil storage tank placed at an elevation above the burner level. The fuel oil is sent to the burner block which houses burner atomizer through a suitable pipeline. The fuel oil is fed by gravity to the burner atomizer and the automizing fluid is admitted into the burner where the fuel oil is getting atomized.
In the atomizer, the fuel oil is held in an oil chamber and the oil level in the oil chamber is maintained at a particular level while the burner is on. The oil chamber is in the form of a convergent divergent nozzle. The convergent divergent nozzle houses an injection nozzle of the atomizing medium and the nozzle is immersed in the oil pool. The immersion of the nozzle is in such a way mat the tip of the nozzle is just below the top level of the oil pool. The oil level
in the nozzle is important. The atomizing air or steam carries oil in a fine spray. The spray is vertically upward and continuous. The oil spray is ignited either by swab or by a spark ignition or by a pilot flame. The required combustion air for the burner is drawn from the atmosphere through the convergent divergent nozzle in which the burner block is mounted centrally.
STATEMENT OF INVENTION
According to this invention, there is provided a gravity fed oil burner comprising a burner block for receiving oil from an oil storage tank disposed at an elevation above said burner block wherein the said burner is mounted centrally on said convergent divergent air nozzle and the location of top edge of the burner block with respect to the convergent divergent nozzle can be adjusted for desired supply of aspirated air and shape of the flame; a first pipeline for delivery of oil to the burner block via an oil entry port; and an atomizing nozzle being provided in the burner block for supply of an atomizing medium via a second pipeline; wherein isolating/regulating valves are provided in said first and second pipelines for isolating and regulating respectively the oil flow into the burner block and atomizing medium flow to an atomizing stub.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
A better understanding of the present invention and its advantages are described with reference to the accompanying drawings, where
Figure 1 shows the arrangement of an oil burner of the present invention without using an oil pump;
Figure 2 shows a burner block mounted inside a convergent divergent air nozzle.
As shown in Figure 1 an oil storage tank 1 is located and placed at a suitable elevation above a burner block 4. The elevation may be approximately or less than 2 M from the burner level. The burner block 4 is mounted centrally inside a convergent divergent air nozzle 8.
An atomizing stub 5 with central hole to admit atomizing medium and radially drilled oil holes to admit oil into an oil chamber 11 is configured centrally and vertically upwards at the center of the burner block 4.
Oil is transported via a first pipe line 3 to an oil entry port 9 of an atomizer nozzle 9' from the oil storage tank 1 to the burner block 4.
A first isolating valve 1' is disposed in the oil flow path near the storage tank 1 to isolate the oil flow into the line. A second isolating valve 6 is disposed near the burner block 4 to isolate the oil to the burner.
A first regulating valve 6' in the oil line is disposed near the burner block 4 to regulate the oil flow into the burner. Oil level in oil chamber 11 of the burner block 4 is maintained just above the atomizing nozzle tip by setting the opening of the first regulating valve 6'.
Atomizing medium is carried via second pipe line 3' from a header 10 to the atomizing steam stub 5. A third Isolation valve 10' near the steam header 10 and a regulating valve 7 to control the atomizing medium flow to the atomizer nozzle and fourth isolation valve 7 in the atomizing medium line near the burner block 4 is successively disposed on the flow path of the atomizing medium.
An oil level indicator 2 is disposed in the oil storage tank to see the oil level in the storage tank.
As shown in Figure 2, the combustion air is aspirated into the combustion chamber through a suitable device comprising convergent divergent air nozzle 8 and burner block 4.
The burner block 4 is mounted centrally inside the convergent divergent air nozzle 8. Combustion air is aspirated from the atmosphere into the combustion
chamber through this convergent divergent air nozzle 8. The top edge location of the burner block with respect to the convergent divergent air nozzle is adjusted in order to get sufficient aspirated air and also to get a desired flame shape.
The burner block 4 is housed in such a way that it is able to generate a vertically upward firing configuration for improved combustion.
In the present invention, the atomization system does not require a fuel oil pressurizing pump. The burner can work at an oil pressure of less than 0.2 kg/cm2 (g)-oil head of approximately or less than 2 meters. A number of burners can be arranged in an array and the flames are vertically upwards.






We CLAIM:
1. A gravity fed oil burner comprising:
- a burner block (4) for receiving oil from an oil storage tank (1) disposed at an elevation above said burner block (4) wherein the said burner (4) is mounted centrally on said convergent divergent air nozzle (8) and the location of top edge of the burner block (4) with respect to the convergent divergent nozzle (8) can be adjusted for desired supply of aspirated air and shape of the flame;
- a first pipeline (3) for delivery of oil to the burner block (4) via an oil entry port (9); and
- an atomizing nozzle (9') being provided in the burner block for supply of an atomizing medium via a second pipeline (3'); wherein
- isolating/regulating valves are provided in said first and second pipelines (3,3') for isolating and regulating respectively the oil flow into the burner block (4) and atomizing medium flow to an atomizing stub (5).

2. The oil burner as claimed in claim 1, wherein a convergent divergent air nozzle (8) is provided for aspirating atmospheric air for combustion in said burner block.
3. The oil burner as claimed in claim 1, wherein said burner block (4) is adaptively housed to generate vertically upward firing configuration for improved combustion.
4. The oil burner as claimed in claim 1, wherein said atomizing medium comprises steam or compressed air.
5. The oil burner as claimed in preceding claims, wherein oil level in oil chamber (11) of the burner block (4) is maintained just above the tip of said atomizing nozzle (9') by setting the opening of a first regulating valve (6').
6. The oil burner as claimed in preceding claims, wherein said burner block (4) and said atomizer stub (5) are configured to operate at a pressure of less than 0.2 kg/cm2 (head less than 2 m).
7. The oil burner as claimed in preceding claims, wherein said oil storage tank (1) is provided with a level indicator (2) to monitor the oil level in said oil storage tank.
8. A gravity fed oil burner substantially as herein described and illustrated in the accompanying drawings.

Documents:

1315-del-2004-Abstract-(29-10-2010).pdf

1315-del-2004-abstract.pdf

1315-del-2004-Claims-(29-10-2010).pdf

1315-del-2004-claims.pdf

1315-del-2004-Correspondence-Others-(29-10-2010).pdf

1315-del-2004-correspondence-others.pdf

1315-del-2004-Description (Complete)-(29-10-2010).pdf

1315-del-2004-description (complete).pdf

1315-del-2004-drawings.pdf

1315-del-2004-Form-1-(29-10-2010).pdf

1315-del-2004-form-1.pdf

1315-del-2004-form-18.pdf

1315-del-2004-Form-2-(29-10-2010).pdf

1315-del-2004-form-2.pdf

1315-del-2004-Form-3-(29-10-2010).pdf

1315-del-2004-form-3.pdf

1315-del-2004-form-5.pdf

1315-del-2004-GPA-(29-10-2010).pdf

1315-del-2004-gpa.pdf


Patent Number 244893
Indian Patent Application Number 1315/DEL/2004
PG Journal Number 53/2010
Publication Date 31-Dec-2010
Grant Date 23-Dec-2010
Date of Filing 16-Jul-2004
Name of Patentee BHARAT HEAVY ELECTRICALS LIMITED
Applicant Address BHEL HOUSE, SIRI FORT, NEW DELHI-110 049, INDIA
Inventors:
# Inventor's Name Inventor's Address
1 MAYANDI SOUNDARA RAJ SR DGM, R&D, BHEL, TIRUCHY
2 SONY RAJAGOPAL KANNAN SR DGM, R&D, BHEL, TIRUCHY
3 SHERIFFUDIN NAZIRUDDIN SR DGM, R&D, BHEL, TIRUCHY
4 KUNHIRAMAN SIVARAMAKRISHNAN SR DGM, R&D, BHEL, TIRUCHY
PCT International Classification Number F24H 9/18
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA