U.S. patent application number 13/714521 was filed with the patent office on 2014-02-13 for combustion apparatus.
This patent application is currently assigned to KOREA INSTITUTE OF MACHINERY & MATERIALS. The applicant listed for this patent is KOREA INSTITUTE OF MACHINERY & MATERIALS. Invention is credited to Min Hur, Woo Seok Kang, Kwan-Tae Kim, Dae-Hoon Lee, Jae Ok Lee, Young Hoon Song.
Application Number | 20140045128 13/714521 |
Document ID | / |
Family ID | 47561108 |
Filed Date | 2014-02-13 |
United States Patent
Application |
20140045128 |
Kind Code |
A1 |
Lee; Dae-Hoon ; et
al. |
February 13, 2014 |
COMBUSTION APPARATUS
Abstract
There is provided a combustion apparatus for reducing generation
of NOx by securing more time for mixing fuel and air and uniformly
mixing fuel and air. The combustion apparatus includes: a modifying
part configured in the center to modify supplied hydrocarbon-based
fuel and air and discharge high temperature modified gas including
hydrogen to an outlet; and a supply part configured at an outer
side of the outlet to jet fuel and air to one side of the modified
gas discharged from the modifying part to form a flame at a
position spaced apart by a pre-set distance from the outlet.
Inventors: |
Lee; Dae-Hoon; (Daejeon,
KR) ; Kim; Kwan-Tae; (Daejeon, KR) ; Song;
Young Hoon; (Daejeon, KR) ; Lee; Jae Ok;
(Daejeon, KR) ; Hur; Min; (Daejeon, KR) ;
Kang; Woo Seok; (Daejeon, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
MACHINERY & MATERIALS; KOREA INSTITUTE OF |
|
|
US |
|
|
Assignee: |
KOREA INSTITUTE OF MACHINERY &
MATERIALS
Daejeon
KR
|
Family ID: |
47561108 |
Appl. No.: |
13/714521 |
Filed: |
December 14, 2012 |
Current U.S.
Class: |
431/354 |
Current CPC
Class: |
F23D 14/64 20130101;
F23C 2900/9901 20130101; F23D 14/68 20130101; F23D 14/22 20130101;
F23D 14/84 20130101; F23D 14/70 20130101; F23C 2201/20 20130101;
F23D 2900/00008 20130101; F23C 99/001 20130101 |
Class at
Publication: |
431/354 |
International
Class: |
F23D 14/68 20060101
F23D014/68; F23D 14/70 20060101 F23D014/70; F23D 14/64 20060101
F23D014/64 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 7, 2012 |
KR |
10-2012-0086479 |
Claims
1. A combustion apparatus comprising: a modifying part configured
in the center to modify supplied hydrocarbon-based fuel and air and
discharge high temperature modified gas including hydrogen to an
outlet; and a supply part configured at an outer side of the outlet
to jet fuel and air to one side of the modified gas discharged from
the modifying part to form a flame at a position spaced apart by a
pre-set distance from the outlet.
2. The combustion apparatus of claim 1, wherein an equivalence
ratio of hydrocarbon-based fuel in the mixture of fuel and air
supplied to the modifying part ranges from a stoichiometric ratio
of partial oxidation to a stoichiometric ratio of combustion.
3. The combustion apparatus of claim 1, wherein the modifying part
comprises: a first housing electrically earthed; and an electrode
separately installed in the center within the first housing and
receiving a voltage applied thereto.
4. The combustion apparatus of claim 3, wherein the first housing
comprises: a discharge region forming a discharge gap with the
electrode therebetween to allow fuel and air to react under a
partial oxidation condition; and an expanded region expanded from
the discharge region to stabilize gas discharged after being
reacted in the discharge region.
5. The combustion apparatus of claim 3, wherein the supply part is
formed to jet fuel and air to an outer side of the modified gas
discharged from the modifying part.
6. The combustion apparatus of claim 5, wherein the supply part
comprises a second housing separately disposed on an outer
circumference of the first housing; and a third housing separately
disposed on an outer circumference of the second housing, and
further comprises: a fuel passage formed between the first housing
and the second housing; and an air passage formed between the
second housing and the third housing.
7. The combustion apparatus of claim 6, wherein the air passage is
connected to the discharge region across the fuel passage by a
passage connection member connecting the second housing and the
first housing.
8. The combustion apparatus of claim 6, wherein the second housing
has a side wall formed at one side of the fuel passage, and the
first housing is connected to the side wall through a method such
as screw-connection or welding.
9. The combustion apparatus of claim 8, wherein the first housing
further comprises a coupling portion protruded toward the side wall
of the second housing, the fuel passage comprises an inflow side
formed at the center of one side of the first housing and a supply
side connected to the outer circumference of the first housing, and
the coupling portion comprises a through hole connecting the inflow
side and the supply side.
10. The combustion apparatus of claim 9, wherein an end portion of
the first housing includes a flange formed to be protruded to an
outer side in a diameter direction of the second housing such that
a space is formed with an end portion of the second housing in a
length direction of the second housing in the opposite side of the
side wall of the second housing, and the space set between the
flange and the end portion of the second housing allows the supply
side of the fuel passage to open to the outside in the diameter
direction of the second housing.
11. The combustion apparatus of claim 10, wherein the end portion
of the second housing and an end portion of the third housing are
disposed in the same line in the diameter direction.
12. The combustion apparatus of claim 3, wherein the first housing
comprises: an inner member forming an air nozzle jetting air toward
the electrode; and an outer member coupled to an outer
circumference of the inner member and accommodating air to be
jetted through the air nozzle upon receiving it.
13. The combustion apparatus of claim 12, wherein a plurality of
air nozzles are disposed to be spaced apart from each other in a
circumferential direction in the inner member, and have an angle
sloped with respect to a diameter direction of the inner
member.
14. The combustion apparatus of claim 3, wherein the supply part is
formed to jet fuel and air in a direction parallel to the direction
in which the modified gas is discharged from an outer side of the
modified gas discharged from the modifying part.
15. The combustion apparatus of claim 12, wherein the supply part
comprises: a second housing separately disposed on an outer
circumference of the first housing and a third housing separately
disposed on an outer circumference of the second housing, and
further comprises: a fuel passage formed between the first housing
and the second housing and an air passage formed between the second
housing and the third housing, and an end portion of the first
housing includes a flange disposed at an inner side of an end
portion of the second housing and protruded inwardly in a diameter
direction of the first housing.
16. The combustion apparatus of claim 15, wherein the end portion
of the first housing and the end portion of the second housing are
formed to be parallel to each other, and a first swirler is
installed between the end portion of the first housing and the end
portion of the second housing and a second swirler is installed
between the end portion of the second housing and the end portion
of the third housing.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to and the benefit of
Korean Patent Application No. 10-2012-0086479 filed in the Korean
Intellectual Property Office on Aug. 7, 2012, the entire contents
of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
[0002] (a) Field of the Invention
[0003] The present invention relates to a combustion apparatus for
reducing generation of NOx by forming flame at a position distant
from an outlet by jetting a gas including high temperature hydrogen
generated by modifying hydrocarbon fuel.
[0004] (b) Description of the Related Art
[0005] A general combustion apparatus is configured to make
supplied fuel and air meet in the interior or exterior to form a
diffusion flame. Here, a generation rate of NOx (or generation of
NOx) may differ according to a mixture degree and a mixture speed
of fuel and air.
[0006] In order to reduce generation of NOx, a combustion apparatus
for jetting air or fuel by multiple stages or performing fuel-rich
combustion and lean combustion by several stages has been
developed. However, multi-staged combustion lengthens flame and
makes a structure of a combustion apparatus complicated.
[0007] In an effort to solve the problem, a combustion apparatus
capable of reducing generation of NOx by mixing fuel and air
rapidly has been developed. In this case, the combustion apparatus
requires an ignitor (i.e., a lighter or a firer) for igniting
flame, and a pilot flame for settling and stabilizing in a
combustion apparatus should be formed in an outlet of the
combustion apparatus. Namely, without the pilot flame, flame is
blown out from the outlet of the combustion apparatus.
[0008] The above information disclosed in this Background section
is only for enhancement of understanding of the background of the
invention and therefore it may contain information that does not
form the prior art that is already known in this country to a
person of ordinary skill in the art.
SUMMARY OF THE INVENTION
[0009] The present invention has been made in an effort to provide
a combustion apparatus having advantages of reducing generation of
NOx by securing more time for mixing fuel and air and uniformly
mixing fuel and air.
[0010] The present invention has also been made in an effort to
provide a combustion apparatus having advantages of forming a flame
at a position distant from an outlet, without being blown out, by
modifying fuel and supplying a modified gas including hydrogen from
the center of the outlet.
[0011] An exemplary embodiment of the present invention provides a
combustion apparatus including: a modifying part configured in the
center to modify supplied hydrocarbon-based fuel and air and
discharge high temperature modified gas including hydrogen to an
outlet; and a supply part configured at an outer side of the outlet
to jet fuel and air to one side of the modified gas discharged from
the modifying part to form a flame at a position spaced apart by a
pre-set distance from the outlet.
[0012] An equivalence ratio of hydrocarbon-based fuel in the
mixture of fuel and air supplied to the modifying part may range
from a stoichiometric ratio of partial oxidation to a
stoichiometric ratio of combustion.
[0013] The modifying part may include a first housing electrically
earthed; and an electrode separately installed in the center within
the first housing and receiving a voltage applied thereto.
[0014] The first housing may include: a discharge region forming a
discharge gap with the electrode therebetween to allow fuel and air
to react under a partial oxidation condition; and an expanded
region expanded from the discharge region to stabilize gas
discharged after being reacted in the discharge region.
[0015] The supply part may be formed to jet fuel and air to an
outer side of the modified gas discharged from the modifying
part.
[0016] The supply part may include a second housing separately
disposed on an outer circumference of the first housing and a third
housing separately disposed on an outer circumference of the second
housing, and may further include a fuel passage formed between the
first housing and the second housing and an air passage formed
between the second housing and the third housing.
[0017] The air passage may be connected to the discharge region
across the fuel passage by a passage connection member connecting
the second housing and the first housing.
[0018] The second housing may have a side wall formed at one side
of the fuel passage, and the first housing may be connected to the
side wall through a method such as screw-connection, welding, or
the like.
[0019] The first housing may further include a coupling portion
protruded toward the side wall of the second housing, the fuel
passage may include an inflow side formed at the center of one side
of the first housing and a supply side connected to the outer
circumference of the first housing, and the coupling portion may
include a through hole connecting the inflow side and the supply
side.
[0020] An end portion of the first housing includes a flange formed
to be protruded to an outer side in a diameter direction of the
second housing such that a space is formed with an end portion of
the second housing in a length direction of the second housing in
the opposite side of the side wall of the second housing, and the
space set between the flange and the end portion of the second
housing may allow the supply side of the fuel passage to open to
the outside in the diameter direction of the second housing.
[0021] The end portion of the second housing and an end portion of
the third housing may be disposed in the same line in the diameter
direction.
[0022] The first housing may include an inner member forming an air
nozzle jetting air toward the electrode, and an outer member
coupled to an outer circumference of the inner member and
accommodating air to be jetted through the air nozzle upon
receiving it.
[0023] A plurality of air nozzles may be disposed to be spaced
apart from each other in a circumferential direction in the inner
member, and may have an angle sloped with respect to a diameter
direction of the inner member.
[0024] The supply part may be formed to jet fuel and air in a
direction parallel to the direction in which the modified gas is
discharged from an outer side of the modified gas discharged from
the modifying part.
[0025] The supply part may include a second housing separately
disposed on an outer circumference of the first housing and a third
housing separately disposed on an outer circumference of the second
housing, and may further include a fuel passage formed between the
first housing and the second housing and an air passage formed
between the second housing and the third housing, and an end
portion of the first housing may include a flange disposed at an
inner side of an end portion of the second housing and protruded
inwardly in a diameter direction of the first housing.
[0026] The end portion of the first housing and the end portion of
the second housing may be formed to be parallel to each other, and
a first swirler may be installed between the end portion of the
first housing and the end portion of the second housing and a
second swirler may be installed between the end portion of the
second housing and the end portion of the third housing.
[0027] According to embodiments of the present invention, the
modifying part modifies fuel to discharge a modified gas including
hydrogen and supplies fuel and air to an outer side of an outlet to
the supply part, and thus, a flame can be stably formed at a
position spaced apart by a pre-set distance from the outlet.
[0028] Thus, a time for mixing fuel supplied from the supply part
and air can be further secured by a time corresponding to the
distance between the outlet of the combustion apparatus and the
flame. Since the mixture time is lengthened, fuel and air can be
more uniformly mixed, and thus, generation of NOx can be
reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] FIG. 1 is a partial sectional perspective view of a
combustion apparatus according to a first embodiment of the present
invention.
[0030] FIG. 2 is a sectional view of the combustion apparatus
illustrated in FIG. 1.
[0031] FIG. 3 is a sectional view taken along line III-Iii in FIG.
2.
[0032] FIG. 4 is a photograph showing a state of a flame when fuel
is burnt by the combustion apparatus of FIG. 1.
[0033] FIG. 5 is a photograph showing a state of a flame when fuel
is burnt by the related art combustion apparatus.
[0034] FIG. 6 is a sectional view of a combustion apparatus
according to a second embodiment of the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0035] Hereinafter, the present invention will be described more
fully hereinafter with reference to the accompanying drawings, in
which exemplary embodiments of the invention are shown. As those
skilled in the art would realize, the described embodiments may be
modified in various different ways, all without departing from the
spirit or scope of the present invention. The drawings and
description are to be regarded as illustrative in nature and not
restrictive. Like reference numerals designate like elements
throughout the specification.
[0036] FIG. 1 is a partial sectional perspective view of a
combustion apparatus according to a first embodiment of the present
invention. FIG. 2 is a sectional view of the combustion apparatus
illustrated in FIG. 1. FIG. 3 is a sectional view taken along line
III-Iii in FIG. 2.
[0037] Referring to FIGS. 1 to 3, a combustion apparatus 1
according to a first embodiment of the present invention includes a
modifying part 100 for modifying hydrocarbon-based fuel into a high
temperature modified gas including hydrogen and a supply part 200
jetting fuel and air to an outlet 101 of the combustion apparatus
1. Hydrogen included in the modified gas has fast combustion speed
and fast diffusion speed. Thus, the high temperature modified gas
and hydrogen supplied from the modifying part 100 form a flame F at
a position distant from the outlet 101 of the combustion apparatus
1 and prevents the flame F from being blown off. Namely, the
modified gas and hydrogen may stabilize the flame F at a position
distant from the outlet 101 of the combustion apparatus 1.
[0038] To this end, the modifying part 100 is provided in the
center of the combustion apparatus 1 and configured to make
supplied fuel react according to a partial oxidation condition to
modify it into a gas including high temperature hydrogen and
discharge the hydrogen and the modified gas to the outlet 101.
[0039] The modified gas discharged from the modifying part 100 is
jetted to a front side (the flame F) from the outlet 101 to push
the flame F based on the combustion of the fuel supplied from the
supply part 200 and air to stably maintain the flame F at a
position distant from the outlet 101 by a pre-set distance L.
[0040] In the present embodiment, the modifying part 100 is
integrally provided in the combustion apparatus 1, so it can stably
supply hydrogen toward the air and fuel supplied from the supply
part 200 to the outlet 101. Thus, the modifying part 100 can supply
hydrogen by a simple configuration, and thus, namely, an additional
device for supplying hydrogen is not required.
[0041] The supply part 200 is provided at an outer side of the
outlet 101 and configured to jet fuel and air to an outer side of
the discharged modified gas to form the flame F. The supply part
200 according to the present embodiment is formed to have a
structure for accommodating the modifying part 100. The fuel and
air supplied from the supply part 200 is pushed by a pre-set
distance L from the outlet 101 by the modified gas supplied from
the modifying part 100.
[0042] However, due to fast combustion and spreading speed of the
high temperature modified gas and hydrogen supplied from the
modifying part 100, the fuel and air supplied from the supply part
200 are burnt at a position distant from the outlet 101 by the
distance L, rather than being blown off, thus stably maintaining
the flame F.
[0043] The distance L set between the outlet 101 and the flame F
secures a longer period of time for mixing fuel and air supplied
from the supply part 200. Thus, the fuel and air in a state of
having left the outlet 101 may be further uniformly mixed while
proceeding by the distance L.
[0044] In this manner, the combustion apparatus 1 according to the
present embodiment can drastically generation of NOx by using the
fast combustion and spreading performance of the high temperature
modified gas and hydrogen generated in the modifying part 100 when
fuel is burnt.
[0045] When a mixture ratio of the fuel and air in the modifying
part 100 is excessively rich, a partial oxidation reaction does not
take place and hydrogen is not generated. Conversely, when the
mixture ratio of the fuel and air in the modifying part 100 is
overly close to a combustion ratio, the flame is maintained only
within the modifying part 100 and hydrogen is not generated.
[0046] When hydrogen is not generated in the modifying part 100,
flame formed according to combustion of fuel and air supplied to
the supply part 200 is blown out in the outlet 101 of the
combustion apparatus 1. Thus, a mixture of fuel and air is required
to have an appropriate equivalence ratio.
[0047] For example, since a stoichiometric ratio of partial
oxidation in a hydrocarbon-based fuel is 0.5 and a stoichiometric
ratio of combustion is 2.0. Thus, in case of LNG having methane as
a main ingredient in a mixture of fuel and air in the modifying
part 100, O.sub.2/C ratio may range from 0.7 to 1.9.
[0048] The combustion apparatus 1 will be described in detail. The
modifying part 100 includes a first housing 10 supplying air and
electrically earthed, and an electrode E separately installed at
the center within the housing 10 to supply fuel and receiving a
voltage HV applied thereto.
[0049] When the voltage HV is applied to the electrode E, plasma
discharge occurs in the fuel and air mixed between the electrode E
and the first housing 10. In this case, the fuel is partially
oxidized to form a high temperature modified gaseous state
including hydrogen.
[0050] The first housing 10 includes a discharge region 111 and an
expanded region 112 set according to a direction in which a gas
modified as fuel and air are introduced is discharged. The
discharge region 111 has a discharge gap G formed between the first
housing 10 and the electrode E, and plasma discharge occurs in the
discharge gap G to allow supplied fuel and air to react under a
partial oxidation condition so as to be modified.
[0051] The expanded region 112 is formed to be expanded greater
than a diameter of the discharge region 111 at one side of the
discharge region 111, and stabilizes gas discharged after being
reacted under the partial oxidation condition and discharges the
stabilized gas. Namely, the modified gas reacted under the partial
oxidation condition is re-circulated in the large space of the
expanded region 112 so as to be stabilized.
[0052] The supply part 200 includes a second housing 20 separately
disposed on an outer circumference of the first housing 10 and a
third housing 30 separately disposed on an outer circumference of
the second housing 20. In this case, the first housing 10 is
accommodated in the second housing, and the second housing 20 is
accommodated in the third housing 30 by stages. For example, the
first, second, and third housings 10, 20, and 30 may form a
concentric circular structure.
[0053] A fuel passage P1 is formed between the first housing 10 and
the second housing 20, and an air passage P2 is formed between the
second housing 20 and the third housing 30. The fuel passage P1 and
the air passage P2 supply fuel and air supplied to one side thereof
to the modifying part 100 and the supply part 200.
[0054] For example, the air passage P2 is connected to the
discharge region 111 of the modifying part 100 across the fuel
passage P1 by a passage connection member 22 connected to the first
housing 10 by passing through the second housing 20. The air
passage P2 supplies air to the discharge region 111. Also, the air
passage P2 supplies air between end portions E2 and E3 of the
second and third housings 20 and 30 of the supply part 200.
[0055] For example, the second housing 20 includes a side wall 21
formed at one side of the fuel passage P1, and the first housing 10
may be connected to the side wall 21 of the second housing 20
through various methods such as screw connection, welding, or the
like. For the screw connection, the first housing 10 further
includes a coupling portion 11 protruded toward the side wall 21 of
the second housing 20. Namely, a male screw of the coupling portion
11 is screw-connected to a female screw of the side wall 21.
[0056] Here, the fuel passage P1 set between the first and second
housings 10 and 20 includes an inflow side P11 formed in the center
at one side of the first housing 10 and a supply side P12 connected
to an outer circumference of the first housing 10.
[0057] The coupling portion 11 of the first housing 10 includes a
through hole 12 connecting the inflow side P11 and the supply side
P12 of the fuel passage P1. As soon as air introduced to the inflow
side P11 is supplied to the discharge region 111, it is supplied to
the supply side P12 through the through hole 12 of the coupling
portion 11.
[0058] In the opposite side of the side wall 21 of the second
housing 20, the first housing 10, the first housing 10 includes a
flange 13 formed on an end portion E1 set in one side of the second
housing 20 in a length direction (in a horizontal direction in FIG.
2).
[0059] The flange 13 is formed to be protruded to the outside in a
diameter direction of the second housing 20 and forms a space C
with the end portion E2 of the second housing 20. The space C allow
the supply side P12 of the fuel passage P1 to be open toward the
outer side in a diameter direction of the second housing 20, so
that supplied fuel can be supplied toward the outer side of the
second housing 20.
[0060] Here, the end portion E2 of the second housing 20 and the
end portion E3 of the third housing 30 are disposed in the same
straight line in the diameter direction, allowing air supplied
through the air passage P2 to be mixed with fuel supplied between
the both end portions E2 and E3.
[0061] Namely, fuel supplied through the fuel passage P1 is
supplied to the end of the air passage P2 through the space C so as
to be mixed with air supplied through the air passage P2, and
discharged to a front side of the outlet 101 in the combustion
apparatus 1 to form the flame F.
[0062] The size of the space C may be adjusted according to a range
in which the coupling portion 11 of the first housing 10 is
fastened to the side wall 21 of the second housing 20. A mixture
ratio of air and fuel may be set by controlling supply of fuel
through the fuel passage P1 with respect to supply of air through
the air passage P2 according to a size of the space C.
[0063] Also, the first housing 10 includes an inner member 14 and
an outer member 15 coupled to partially overlap with each other in
a length direction. The inner member 14 includes an air nozzle 16
jetting air toward the electrode E of the discharge region 111.
[0064] A plurality of air nozzles 16 are disposed to be spaced
apart from the inner member 14 in a circumferential direction, and
have an angle (.theta.) sloped with respect to a diameter direction
of the inner member 14 (See FIG. 3). Thus, air supplied to the air
nozzle 16 is supplied while being rotated in the circumferential
direction between the electrode E and the first housing 10 and in
the gap G.
[0065] The outer member 15 includes a chamber 17 coupled to an
outer circumference of the inner member 14 and accommodating air
upon receiving it from the air nozzle 16. Thus, the chamber 17
makes amounts of air jet through the plurality of air nozzles 16
uniform by uniformly maintaining pressure of supplied air.
[0066] Meanwhile, the electrode E forming the discharge region 111
together with the inner member 14 includes a fuel nozzle 26 jetting
fuel. The fuel nozzle 26 is connected to the inflow side P11 of the
fuel passage P1 and jets supplied fuel to the inner wall of the
inner member 14 in the vicinity of the gap G.
[0067] The fuel jetted to the gap G of the discharge region 111 is
mixed with air rotated upon being jetted through the air nozzle 16,
and reacts under a partial oxidation condition, while generating a
rotating arc by a voltage HV set between the electrode E and the
inner member 14. Namely, fuel is modified into a high temperature
gas including hydrogen.
[0068] The hydrogen and the modified gas modified in the discharge
region 111 is recirculated in the expanded region 112 so as to be
stabilized and discharged to the outlet 101. The discharged
hydrogen and modified gas act as pushing force in the distance L
within a pre-set range in front of the outlet 101 to thrust fuel
and air supplied to the supply part 200 out of the range of the
distance L.
[0069] Thus, the fuel and air supplied to the supply part 200
reaches outside of the range of the distance L through the outside
of the region of the hydrogen and modified gas. At the same time,
the modified gas is maintained to have a high temperature state and
hydrogen has a fast combustion and spreading speed. Thus, the fuel
and air supplied to the supply part 200 is implemented for lean
combustion outside of the range of the distance L, stably
maintaining the flame F.
[0070] While proceeding by the distance L, the fuel and air
supplied to the supply part 20 are mixed to have a further uniform
state for an additional mixture time, implementing lean combustion.
Thus, when fuel is burnt, generation of NOx can be reduced.
[0071] FIG. 4 is a photograph showing a state of a flame when fuel
is burnt by the combustion apparatus 1 of FIG. 1, and FIG. 5 is a
photograph showing a state of a flame when fuel is burnt by the
related art combustion apparatus.
[0072] Referring to FIGS. 4 and 5, the related art combustion
apparatus 2 approaches the outlet to form a flame F2. In
comparison, the combustion apparatus 1 according to an embodiment
of the present invention stabilizes the flame F at a position
distant from the outlet 101 by the distance L. It can be seen that
the flame F is not formed in the central portion of the outlet
101.
[0073] Hereinafter, a second embodiment of the present invention
will be described. A description of the same configuration as that
of the first embodiment will be omitted and a different
configuration from that of the first embodiment will be
described.
[0074] FIG. 6 is a sectional view of a combustion apparatus
according to a second embodiment of the present invention.
Referring to FIG. 6, in a combustion apparatus 3 according to the
second embodiment of the present invention, a supply part 300 is
formed to jet fuel and air in a direction parallel to the discharge
direction of the modified gas at an outer side of the modified gas
including hydrogen discharged from the modifying part 100.
[0075] For example, an end portion E21 of the first housing 10
includes a flange 23 disposed at an inner side of an end portion
E22 of the second hosing 20 and protruded inwardly in a diameter
direction of the first housing 10.
[0076] The flange 23 is formed to narrow the outlet 102 in the
discharge region 111 to thus lower or adjust a speed of the
modified gas including hydrogen sprut through the outlet 102.
[0077] An end portion E23 of the third housing 30 is disposed to be
parallel in the outlet 102 together with the end portion E22 of the
second housing 20. A first swirler S1 may is provided between the
end portions E21 and E22 of the first and second housings 10 and 20
forming the fuel passage P1 in order to swirl discharged fuel. A
second swirler S2 is provided between the end portions E22 and E23
of the second and third housings 20 and 30 forming the air passage
P2 in order to swirl discharged air.
[0078] Thus, fuel discharged between the end portions E21 and E22
of the first and second housings 10 and 20 and air discharged
between the end portions E22 and E23 of the second and third
housings 20 and 30 are swirled to be mixed by the first and second
swirlers S1 and S2, so as to be discharged while being swirled in a
direction parallel to the discharge direction of the modified
gas.
[0079] The fuel and air mixed by the first and second swirlers S1
and S2 may form the flame F, without being blown out, at a position
distant from the outlet 102 by the distance L according to the
discharge speed of the modified gas.
[0080] While this invention has been described in connection with
what is presently considered to be practical exemplary embodiments,
it is to be understood that the invention is not limited to the
disclosed embodiments, but, on the contrary, is intended to cover
various modifications and equivalent arrangements included within
the spirit and scope of the appended claims.
TABLE-US-00001 <Description of symbols> 10, 20, 30: first,
second, and third housing 11: coupling portion 12: through hole 13,
23: flange 14: inner member 15: outer member 16: air nozzle 17:
chamber 21: side wall 100: modifying part 101, 102: outlet 111:
discharge region 112: expanded region 200: supply part C: interval
E1, E2, E3, E21, E22, E23: end portion F: flame L: distance P1:
fuel passage P11: inflow side P12: supply side P2: air passage 1,
2, 3: combustion apparatus
* * * * *