U.S. patent application number 12/151749 was filed with the patent office on 2008-11-13 for oil gasification burner for ash-free liquid fuel.
This patent application is currently assigned to Siemens Aktiengesellschaft. Invention is credited to Tino Just, Christian Reuther, Manfred Schingnitz.
Application Number | 20080280237 12/151749 |
Document ID | / |
Family ID | 39868639 |
Filed Date | 2008-11-13 |
United States Patent
Application |
20080280237 |
Kind Code |
A1 |
Just; Tino ; et al. |
November 13, 2008 |
Oil gasification burner for ash-free liquid fuel
Abstract
An oil gasification burner for liquid fuel is proposed which
comprises, on a centrally arranged pilot burner part, a number of
supply elements arranged outside the annular channel concentrically
to the burner axis with pressure atomizer nozzles for introduction
of liquid fuel. The pressure atomizer nozzles are embodied such
that a fine atomization of the liquid fuel occurs before it comes
into contact with the rotated oxidation means. Different liquid
fuels can be supplied via the individual supply elements. This
enables the nozzle parameters to be adapted to the particular
conditions (pressure difference, fineness of droplets, spray angle
etc.) of the liquid fuel through a choice of replaceable
nozzle.
Inventors: |
Just; Tino; (Freiberg,
DE) ; Reuther; Christian; (Freiberg, DE) ;
Schingnitz; Manfred; (Freiberg, DE) |
Correspondence
Address: |
SIEMENS CORPORATION;INTELLECTUAL PROPERTY DEPARTMENT
170 WOOD AVENUE SOUTH
ISELIN
NJ
08830
US
|
Assignee: |
Siemens Aktiengesellschaft
|
Family ID: |
39868639 |
Appl. No.: |
12/151749 |
Filed: |
May 8, 2008 |
Current U.S.
Class: |
431/4 ;
431/284 |
Current CPC
Class: |
F23D 2214/00 20130101;
F23D 2900/00016 20130101; F23D 2213/00 20130101; F23D 11/38
20130101; F23D 11/24 20130101 |
Class at
Publication: |
431/4 ;
431/284 |
International
Class: |
F23J 7/00 20060101
F23J007/00; F23Q 9/00 20060101 F23Q009/00 |
Foreign Application Data
Date |
Code |
Application Number |
May 10, 2007 |
DE |
10 2007 021 927.1 |
Claims
1.-8. (canceled)
9. An oil gasification burner for a liquid fuel, comprising: a
pilot burner centrally arranged along an axis of the burner; a
concentric annular channel that supplies an oxidant; and a
plurality of supply elements arranged outside the annular channel
concentric to the burner axis that introduce liquid fuel, wherein
the individual supply elements are arranged straight in the burner,
are aligned essentially in parallel to the burner axis, have a
pressure atomizer nozzle arranged on the individual supply elements
on a side facing towards the mouth of the burner, and the
individual supply elements end at the mouth of the burner next to
an outlet of the concentric annular channel oxidant supply.
10. The oil gasification burner as claimed in claim 9, wherein a
pressure atomizer nozzle is attached via a screw connection to the
supply element.
11. The oil gasification burner as claimed in claim 10, wherein the
pressure atomizer nozzle atomizes the liquid fuel before it comes
into contact with the oxidant.
12. The oil gasification burner as claimed in claim 11, wherein the
annular channel narrows from the burner entry to the burner
mouth.
13. The oil gasification burner as claimed in claim 12, wherein the
annular channel has swirler devices that impart a rotational
movement to the flow of oxidant.
14. The oil gasification burner as claimed in claim 13, wherein
different liquid fuels are supplied via the individual supply
elements.
15. A method for operating an oil gasification burner for liquid
fuel, comprising: providing a centrally arranged pilot burner along
an axis of the burner; arranging concentrically an annular channel
that supplies an oxidant; arranging a plurality of supply elements
outside the annular channel concentric to the burner axis that
introduce liquid fuel, wherein the individual supply elements are
arranged straight in the burner, are aligned essentially in
parallel to the burner axis, have a pressure atomizer nozzle
arranged on the individual supply elements on a side facing towards
the mouth of the burner, and the individual supply elements end at
the mouth of the burner next to an outlet of the concentric annular
channel oxidant supply; and supplying different liquid fuels to the
individual supply elements.
16. The method as claimed in claim 15, wherein a pressure atomizer
nozzle is attached via a screw connection to the supply
element.
17. The method as claimed in claim 16, wherein the pressure
atomizer nozzle atomizes the liquid fuel before it comes into
contact with the oxidant.
18. The method as claimed in claim 17, wherein the annular channel
narrows from the burner entry to the burner mouth.
19. The method as claimed in claim 18, wherein the annular channel
has swirler devices that impart a rotational movement to the flow
of oxidant.
20. A method for commissioning an oil gasification burner for
liquid fuel, comprising: providing a centrally arranged pilot
burner along an axis of the burner; arranging concentrically an
annular channel that supplies an oxidant; arranging a plurality of
supply elements outside the annular channel concentric to the
burner axis that introduce liquid fuel, wherein the individual
supply elements are arranged straight in the burner, are aligned
essentially in parallel to the burner axis, have a pressure
atomizer nozzle arranged on the individual supply elements on a
side facing towards the mouth of the burner, and the individual
supply elements end at the mouth of the burner next to an outlet of
the concentric annular channel oxidant supply; supplying different
liquid fuels to the individual supply elements; igniting the
centrally arranged pilot burner in a reducing reactor atmosphere
and at slightly increased system pressure; and increasing the
reaction space pressure to the operating pressure required for
ignition of the oil burner as the output of the pilot burner is
increased.
21. The method as claimed in claim 20, wherein a pressure atomizer
nozzle is attached via a screw connection to the supply
element.
22. The method as claimed in claim 21, wherein the pressure
atomizer nozzle atomizes the liquid fuel before it comes into
contact with the oxidant.
23. The method as claimed in claim 22, wherein the annular channel
narrows from the burner entry to the burner mouth.
24. The method as claimed in claim 23, wherein the annular channel
has swirler devices that impart a rotational movement to the flow
of oxidant.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefits of German application
No. 10 2007 021 927.1 filed May 10, 2007 and is incorporated by
reference herein in its entirety.
FIELD OF INVENTION
[0002] The subject matter of the application relates to an oil
gasification burner for liquid fuel, a method for operating an oil
gasification burner for liquid fuel and a method for commissioning
an oil gasification burner for liquid fuel.
[0003] The invention relates to an oil gasification burner with
pressure atomizer nozzles for steam-oxygen gasification of ash-free
liquid fuel under high pressures of for example 80 bar (8 MPa) and
high temperatures of for example 1200 to 1900 degrees Celsius in
ceramic-lined reactors.
BACKGROUND OF THE INVENTION
[0004] Burners are known with a pressure atomizer nozzle for
partial oxidation of liquid fuels with a cylindrical water-cooled
housing and an internal liquid supply around which a coaxially
disposed annular space for the supply of the oxidation means is
arranged.
[0005] A separate pilot burner, which initially brings the walling
up to temperature and at which the oil burner is later ignited is
used for the commissioning of these burners.
[0006] The disadvantages of the known burner are as follows:
[0007] A central liquid feed sets the use of the burner to a single
fuel.
[0008] For commissioning the burner it is necessary to use a
further burner as a pilot burner, which is replaced later.
[0009] The oil burner is basically not commissioned under pressure
in such cases and in an oxidizing atmosphere and initially has to
be slowly transferred by complicated media adaptation processes to
the reducing reactor atmosphere, before the actual gasification
process can begin.
[0010] If the temperature of the walling drops below the
predetermined wall ignition temperature after the heating-up
process because the installation of the oil burner is delayed, the
entire pilot lighting process must be repeated.
[0011] Pat. DD 151020 as well as DD 214911 show such typical
solutions.
SUMMARY OF INVENTION
[0012] The object of the invention is the creation of an oil burner
with pressure atomizer nozzles which operates reliably under the
conditions of steam-oxygen gasification of liquid ash-free fuels
under pressure. Through constructional measures a burner is to be
embodied with pressure atomizer nozzles which compensates for the
said disadvantages in the pressurized gasification of liquid
ash-free fuel and guarantees safe operation with even flame
generation.
[0013] The object is achieved for generic subject matter by the
features of the claims.
[0014] Advantageous developments of the subject matter of the
application are specified in the subclaims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The subject matter of the application is explained in
greater detail below, to an extent necessary for understanding, on
the basis of figures. The figures show:
[0016] FIG. 1 a cross-section through an inventive oil gasification
burner and
[0017] FIG. 2 a longitudinal cross section through an inventive oil
gasification burner.
[0018] In the figures the same labels refer to the same
elements.
DETAILED DESCRIPTION OF INVENTION
[0019] The inventive burner with pressure atomizer nozzles has a
pilot burner 1 arranged in its center which is equipped with a
combustion gas and oxidation means supply, a flame monitoring
device and also electrical high-voltage ignition.
[0020] Arranged around this module is an annular space 2 for
supplying the oxidation means for the actual oil burner. Swirler
vanes 3 are provided for swirling the stream of oxygen at the
annular outlet opening of the oxidation means.
[0021] Both modules (pilot burner part and oxidation means supply)
are integrated into a further module, the burner mounting 6. The
entire burner mounting is designed with a water cooling system in
the form of a wound tubular pipe to remove the heat acting on this
module. In addition the modules arranged in the center of the
burner mounting, the pilot burner part and the further oxidation
means supply are equipped with separate water cooling systems.
[0022] Inventively the supply of the liquid fuel is provided so
that a number (n=2, 3, . . . ) of straight fuel supply elements 4
are located between the housing wall of the burner mounting and the
central oxidation means supply. The supply elements are arranged
concentrically around the central axis of the burner with the same
angular offset. With the embodiment shown in FIG. 1 with three
atomizing supply elements they are arranged concentrically around
the central axis of the burner at an angle of 120 degrees from one
another. The supply elements per se are designed straight,
essentially parallel to the central axis of the burner and end at
the burner mouth next to the oxidation means exit in the form of an
oil pressure atomizer nozzle 5.
[0023] The special design of the pressure atomizer nozzle produces
a fine atomization of the liquid fuel before it comes into contact
with the oxidation means. The special pressure atomizer nozzle is
connected to the supply pipe using a screw connection, allowing the
nozzle to be replaced if required. This enables the nozzle
parameters to be adapted to the particular conditions (pressure
difference, fineness of droplets, spray angle etc.) of the liquid
fuel through a choice of nozzle.
[0024] By introducing the liquid fuel in individual pipes with a
corresponding nozzle different liquid fuels can be simultaneously
supplied via the individual supplies and converted into a flame
reaction.
[0025] Designing the oxidation means supply with swirler vanes
imparts a strong rotational motion to the oxygen exiting from the
supply into which the finely-atomized steams of liquid exiting via
the supply elements are sucked.
[0026] At the exit of the media the individual streams merge into a
single rotating liquid-oxygen stream. This achieves an even flame
generation and stabilization.
[0027] At the same time the flame generation can be influenced in
its width and length by different settings of the swirler
vanes.
[0028] The commissioning of the oil burner with pressure atomizer
nozzles is undertaken by means of the integrated pilot burner under
reducing conditions and at operating pressure of the reactor
system. The pilot burner is ignited at slight reactor pressure (2-5
bar) and likewise under reducing reaction chamber conditions.
[0029] The invention comprises an oil burner with injection
atomization for the gasification of liquid ash-free fuel under high
pressures of for example 80 bar (8 MPa) and high temperatures of
for example 1200 to 1900 degrees Celsius in ceramic-lined reactors
for oxygen gasification, featuring a cooled housing (6) for
accommodating a centrally arranged pilot burner (1) for
commissioning the burner unit with a gas and oxidation means supply
as well as integrated flame monitoring and high-voltage ignition,
an annular channel (2) arranged around this pilot burner (1) for
supplying the oxidation means and straight supply elements for
Introduction of liquid fuel (4), characterized in that a number of
supply elements (4) are present and these supply elements (4) are
straight per se and end at the exit directly next to the annular
channel for oxidation means supply (2) with a nozzle (5), at the
exit of which swirler devices (3) are present which impart a strong
rotational movement to the oxidation means stream (2) and thereby
through the corresponding embodiment allow influencing of the flame
geometry.
[0030] In a further embodiment a number of supply elements are
arranged via which different liquid fuels can be introduced which
end in a common flame and which are commissioned by means of a
pilot burner (1) integrated into the center under reducing
conditions and under reactor operating pressure.
[0031] In a further embodiment the invention comprises a method in
which the pilot burner (1) integrated into the center is ignited in
a reducing reactor atmosphere and with slightly raised system
pressure and then, as the output of the pilot burner is increased
the reaction space pressure is raised to the operating pressure
necessary for igniting the oil burner.
* * * * *