AU2021427966B2 - Combustion device and boiler - Google Patents
Combustion device and boiler Download PDFInfo
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- AU2021427966B2 AU2021427966B2 AU2021427966A AU2021427966A AU2021427966B2 AU 2021427966 B2 AU2021427966 B2 AU 2021427966B2 AU 2021427966 A AU2021427966 A AU 2021427966A AU 2021427966 A AU2021427966 A AU 2021427966A AU 2021427966 B2 AU2021427966 B2 AU 2021427966B2
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- Prior art keywords
- injection nozzle
- ammonia
- tip portion
- ammonia injection
- temperature
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/12—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air gaseous and pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details
- F23D11/38—Nozzles; Cleaning devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J7/00—Arrangement of devices for supplying chemicals to fire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/16—Measuring temperature burner temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gas Separation By Absorption (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Combustion Of Fluid Fuel (AREA)
- Treating Waste Gases (AREA)
Abstract
A combustion device 100 comprises: a burner 4 having an ammonia injection nozzle 41, the tip of which is provided with an injection port 41c facing the internal space of a furnace 2; an adjustment mechanism 7 that adjusts the temperature of the tip; and a control device 9 that controls the operation of the adjustment mechanism 7 so that the temperature of the tip is at or below a reference temperature.
Description
Description
Title: COMBUSTION DEVICE AND BOILER
Technical Field
[0001]
The present disclosure relates to a combustion device and
aboiler. This applicationclaims thebenefit ofprioritybased
on Japanese Patent Application No. 2021-025118 filed on
February19, 2021, the contents ofwhichare incorporatedherein
by reference.
Background Art
[0002]
Amongburnersprovidedin a furnace suchas aboiler, there
is a burner having an ammonia injection nozzle that injects
ammonia as fuel. By using ammonia as fuel, carbon dioxide
emissions are reduced. For example, Patent Literature 1
discloses a burner that mixes and combusts pulverized coal and
ammonia as fuel.
Citation List
Patent Literature
[0003] Patent Literature 1: JP 2019-086189 A
Summary
[0004]
By the way, in the burner having the ammonia injection nozzle, ammonia is injected from an injection port provided at a tip portion of the ammonia injection nozzle, and thus flame is formed in front of the burner. The tip portion of the ammonia injection nozzle is exposed to an atmosphere containing ammonia and having a high temperature, and thus is easily nitrided.
Therefore, it is desirable to suppress nitriding of the ammonia
injection nozzle in order to suppress reduction in toughness
due to nitriding of the tip portion of the ammonia injection
nozzle.
[00051
In one aspect of the present disclosure, there is provided
a combustion device and a boiler capable of suppressing
nitriding of the ammonia injection nozzle.
[00061
In one aspect of the present disclosure, there is provided
a combustion device of the present disclosure includes: a burner
including an ammonia injection nozzle having a tip portion
provided with an injection port facing an internal space of a
furnace; an adjustment structure that adjusts a temperature of
the tip portion; and a controldevice that controls an operation
of the adjustment structure so that the temperature of the tip
portion is equal to or lower than a reference temperature.
[0007]
The adjustment structure may include a mechanism that
adjusts a flow rate of ammoniaintheammonia injection nozzle.
[00081
The adjustment structure may include a mechanism that
adjusts a separation distance between the injection port and
the internal space.
[00091
The adjustment structure may include a mechanism that
adjusts an opening area of the injection port.
[0010]
The combustion device may include an air pipe disposed
coaxially with the ammonia injection nozzle so as to surround
the ammonia injection nozzle, and the adjustment structure may
include a mechanism that adjusts a flow rate of air in the air
pipe.
[0011]
In one aspect, a boiler according to the present
disclosure includes the combustion device described above.
[0011A] According to one aspect of the present disclosure, there
is provided a combustion device comprising:
a burner including an ammonia injection nozzle having a
tip portion provided with an injection port facing an internal
space of a furnace;
an adjustment structure that adjusts a temperature of the
tip portion; and
a control device that controls an operation of the
adjustment structure so that the temperature of the tip portion
is equal to or lower than a reference temperature,
3a
wherein the reference temperature is a temperature equal
to or lower than a lower limit value of a nitriding temperature
range that is a temperature range in which nitriding of the tip
portion is likely to occur.
[00121
According to the present disclosure, it is possible to
suppress nitriding of the ammonia injection nozzle.
Brief Description of Drawings
[0013]
Fig. 1 is a schematic diagram illustrating a boiler
according to the present embodiment.
Fig. 2 is a schematic diagram illustrating a combustion
device according to the present embodiment.
Fig. 3 is a flowchart illustrating an example of a flow
of processing performed by a control device according to the
present embodiment.
Fig. 4 is a schematic diagram illustrating a combustion
device according to a first modification.
Fig. 5 is a schematic diagram illustrating a state in
which a tip portion temperature is higher in the combustion
device according to the first modification than in an example
of Fig. 4.
Fig. 6 is a schematic diagram illustrating the combustion
device according to a second modification.
Fig. 7 is a schematic diagram illustrating a state in
which the tip portion temperature is higher in the combustion
device according to the second modification than in an
example of Fig. 6.
Fig. 8 is a schematic diagram illustrating the combustion
device according to a third modification.
Description of Embodiments
[0014]
Hereinafter, embodiments of the present disclosure will
be described with reference to the accompanying drawings.
Dimensions, materials, other specific numerical values, and the like shown in the embodiments are merely examples for facilitating understanding, and do not limit the present disclosure unless otherwise specified. Note that in the present specification and the drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, redundant description is omitted, and elements not directly related to the present disclosure are not illustrated.
[0015]
Fig. 1 is a schematic diagram illustrating a boiler 1
according to the present embodiment. As illustrated in Fig.
1, a boiler 1 includes a furnace 2, a flue gas duct 3, and a
burner 4.
[0016]
The furnace 2 is a furnace that burns fuel to generate
combustion heat. Hereinafter, an example in which ammonia
and pulverized coal are used as fuel in the furnace 2 will be
mainly described. By using ammonia and pulverized coal as
fuel, carbon dioxide emissions are reduced. However, as
described later, the fuel used in the furnace 2 is not
limited to this example.
[0017]
The furnace 2 has a cylindrical shape (for example, a
rectangular cylindrical shape) extending in a vertical
direction. In the furnace 2, high-temperature combustion gas
is generated by combustion of the fuel. A bottom portion of
the furnace 2 is provided with a discharge port 2a for discharging ash content generated by the combustion of the fuel to the outside.
[0018]
The flue gas duct 3 is a path for guiding the combustion
gas generated in the furnace 2 to the outside as exhaust gas.
The flue gas duct 3 is connected with an upper portion of the
furnace 2. The flue gas duct 3 has a horizontal flue gas
duct 3a and a rear flue gas duct 3b. The horizontal flue gas
duct 3a extends horizontally from the upper portion of the
furnace 2. The rear flue gas duct 3b extends downwardly from
an end portion of the horizontal flue gas duct 3a.
[0019]
The boiler 1 includes a superheater (not illustrated)
provided in the upper portion or the like of the furnace 2.
In the superheater, heat is exchanged between combustion heat
generated in the furnace 2 and water. Accordingly, water
vapor is generated. Further, the boiler 1 may include
various devices (for example, a reheater, an economizer, an
air preheater, or the like) not illustrated in Fig. 1.
[0020]
The burner 4 is provided in a lower wall portion of the
furnace 2. The furnace 2 is provided with a plurality of
burners 4 at intervals in a circumferential direction of the
furnace 2. Note that although not illustrated in Fig. 1, the
plurality of burners 4 are also provided at intervals in an
extending direction (an up-down direction) of the furnace 2.
The burner 4 injects ammonia and pulverized coal as fuel into the furnace 2. The fuel injected from the burner 4 burns to form a flame F in the furnace 2. Note that the furnace 2 is provided with an ignition device (not illustrated) that ignites the fuel injected from the burner 4.
[0021]
Fig. 2 is a schematic diagram illustrating a combustion
device 100 according to the present embodiment. As
illustrated in Fig. 2, the combustion device 100 includes a
burner 4, an air supply unit 5, an ammonia tank 6, an
adjustment structure 7 (specifically, a mechanism including a
flow rate control valve 71), a temperature sensor 8, and a
control device 9.
[0022]
The burner 4 is attached to a wall portion of the furnace
2 outside the furnace 2. The burner 4 includes an ammonia
injection nozzle 41, an air injection nozzle 42, and a
pulverized coal injection nozzle 43. The ammonia injection
nozzle 41 is a nozzle that injects ammonia. The air
injection nozzle 42 is a nozzle that injects combustion air.
The pulverized coal injection nozzle 43 is a nozzle that
injects the pulverized coal.
[0023]
The ammonia injection nozzle 41, the air injection nozzle
42, and the pulverized coal injection nozzle 43 each have a
cylindrical shape. The air injection nozzle 42 is disposed
coaxially with the ammonia injection nozzle 41 so as to
surround the ammonia injection nozzle 41. The pulverized coal injection nozzle 43 is disposed coaxially with the air injection nozzle 42 so as to surround the air injection nozzle 42. The ammonia injection nozzle 41, the air injection nozzle 42, and the pulverized coal injection nozzle
43 form a triple cylindrical structure. Central axes of the
ammonia injection nozzle 41, the air injection nozzle 42, and
the pulverized coal injection nozzle 43 intersect
(specifically, are substantially perpendicular to) the wall
portion of the furnace 2.
[0024]
Hereinafter, a radial direction of the burner 4, an axial
direction of the burner 4, and a circumferential direction of
the burner 4 are also simply referred to as a radial
direction, an axial direction, and a circumferential
direction. A furnace 2 side (right side of Fig. 2) of the
burner 4 is referred to as a tip side, and a side (left side
of Fig. 2) opposite to the furnace 2 side of the burner 4 is
referred to as a rear end side.
[0025]
The ammonia injection nozzle 41 includes a main body 41a,
a supply port 41b, and an injection port 41c. The main body
41a has a cylindrical shape. The main body 41a extends on a
central axis of the burner 4. A wall thickness, an inner
diameter, and an outer diameter of the main body 41a are
substantially constant regardless of an axial position.
However, the wall thickness, the inner diameter, and the
outer diameter of the main body 41a may change depending on the axial position. The supply port 41b that is an opening is provided at a rear end portion of the main body 41a. The supply port 41b is connected to the ammonia tank 6. The injection port 41c that is an opening is provided at a tip portion of the main body 41a. The injection port 41c faces an internal space of the furnace 2. That is, the injection port 41c is directed to the internal space of the furnace 2.
[0026]
The ammonia is supplied from the ammonia tank 6 into the
main body 41a through the supply port 41b. As indicated by
arrow Al, the ammonia supplied into the main body 41a flows
in the main body 41a. The ammonia that has passed through
the main body 41a is injected from the injection port 41c
toward the internal space of the furnace 2. In this manner,
the ammonia injection nozzle 41 is provided toward the
internal space of the furnace 2.
[0027]
The air injection nozzle 42 includes a main body 42a and
an injection port 42b. The main body 42a has a cylindrical
shape. The main body 42a is disposed coaxially with the main
body 41a of the ammonia injection nozzle 41 so as to surround
the main body 41a. The main body 42a has a tapered shape
toward the tip side. A supply port (not illustrated) is
provided in a rear portion (that is, a portion on the rear
end side) of the main body 42a.
[0028]
The supply port of the air injection nozzle 42 is connected to an air supply source (not illustrated). For example, the supply port of the air injection nozzle 42 is exposed to the atmosphere as the air supply source. The injection port 42b that is an opening is provided at a tip portion of the main body 42a. The tip portion of the main body 41a of the ammonia injection nozzle 41 is located radially inside the tip portion of the main body 42a. The injection port 42b is an annular opening between the tip portion of the main body 42a and the tip portion of the main body 41a of the ammonia injection nozzle 41. The injection port 42b faces the internal space of the furnace 2. That is, the injection port 42b is directed to the internal space of the furnace 2.
[0029]
Air is supplied from the air supply source (for example,
the atmosphere) into the main body 42a via the supply port
(not illustrated). As illustrated by arrow A2, the air
supplied into the main body 42a flows in a space between an
inner peripheral portion of the main body 42a and an outer
peripheral portion of the main body 41a of the ammonia
injection nozzle 41. The air that has passed through the
main body 42a is injected from the injection port 42b toward
the internal space of the furnace 2. In this manner, the air
injection nozzle 42 is provided toward the internal space of
the furnace 2.
[0030]
The pulverized coal injection nozzle 43 includes a main body 43a and an injection port 43b. The main body 43a has a cylindrical shape. The main body 43a is disposed coaxially with the main body 42a of the air injection nozzle 42 so as to surround the main body 42a. The main body 43a has a tapered shape toward the tip side. A supply port (not illustrated) is provided in a rear portion (that is, a portion on the rear end side) of the main body 43a.
[0031]
The supply port of the pulverized coal injection nozzle
43 is connected to a pulverized coal supply source (not
illustrated). The injection port 43b that is an opening is
provided at a tip portion of the main body 43a. An axial
position of a tip of the main body 43a substantially
coincides with an axial position of a tip of the main body
42a of the air injection nozzle 42. The injection port 43b
is an annular opening between the tip portion of the main
body 43a and the tip portion of the main body 42a of the air
injection nozzle 42. The injection port 43b faces the
internal space of the furnace 2. That is, the injection port
43b is directed to the internal space of the furnace 2.
[0032]
The pulverized coal is supplied into the main body 43a
from the pulverized coal supply source via a supply port (not
illustrated) together with air for conveying the pulverized
coal. As illustrated by arrow A3, the pulverized coal
supplied into the main body 43a flows together with the air
in a space between the inner peripheral portion of the main body 43a and the outer peripheral portion of the main body
42a of the air injection nozzle 42. The pulverized coal that
has passed through the main body 43a is injected from the
injection port 43b toward the internal space of the furnace
2. In this manner, the pulverized coal injection nozzle 43
is provided toward the internal space of the furnace 2.
[00331
The air supply unit 5 supplies the combustion air to a
flame (see a flame F in Fig. 1) formed by the burner 4 from
radially outside. The air supply unit 5 is disposed to cover
between the tip portion of the burner 4 and the furnace 2. A
flow path 51 through which the air flows is formed in the air
supply unit 5. The flow path 51 is formed in a cylindrical
shape coaxial with the burner 4. The flow path 51 is
connected to the air supply source (not illustrated). An
injection port 52 is formed at an end portion of the flow
path 51 on the furnace 2 side.
[0034]
As illustrated by arrow A4, the air supplied from the air
supply source to the air supply unit 5 passes through the
flow path 51 and is injected from the injection port 52
toward the internal space of the furnace 2. The injection
port 52 faces the internal space of the furnace 2. That is,
the injection port 52 is directed to the internal space of
the furnace 2. In this manner, the air supply unit 5 is
provided toward the internal space of the furnace 2. The air
injected from the injection port 52 of the air supply unit 5 advances toward the internal space of the furnace 2 while swirling in the circumferential direction.
[00351
The adjustment structure 7 is a mechanism for adjusting a
temperature (hereinafter, also referred to as a tip portion
temperature) of a tip portion of the ammonia injection nozzle
41. The tip portion of the ammonia injection nozzle 41 is a
portion of the ammonia injection nozzle 41 near the injection
port 41c (for example, a portion within a predetermined
distance rearwardly from the injection port 41c in the axial
direction).
[00361
In the present embodiment, the adjustment structure 7
adjusts the tip portion temperature of the ammonia injection
nozzle 41 by adjusting a flow rate of ammonia (hereinafter,
also referred to as an ammonia flow rate) in the ammonia
injection nozzle 41. The adjustment structure 7 includes a
flow rate control valve 71.
[0037]
The flow rate control valve 71 controls the flow rate of
ammonia supplied from the ammonia tank 6 to the ammonia
injection nozzle 41. The flow rate control valve 71 is
provided in a flow path connecting the ammonia tank 6 and the
supply port 41b of the ammonia injection nozzle 41. By
adjusting an opening degree of the flow rate control valve
71, the flow rate of ammonia supplied from the ammonia tank 6
to the ammonia injection nozzle 41 is adjusted. Accordingly, the flow rate of ammonia (that is, the ammonia flow rate) in the ammonia injection nozzle 41 is adjusted. Specifically, the ammonia flow rate increases as the opening degree of the flow rate control valve 71 increases.
[00381
Note that in the ammonia tank 6, the ammonia is stored in
a liquid state. The ammonia stored in the ammonia tank 6 is
vaporized by a vaporizer. Vaporized ammonia is supplied to
the ammonia injection nozzle 41 through the flow rate control
valve 71.
[00391
Here, the tip portion of the ammonia injection nozzle 41
is cooled by ammonia flowing through the ammonia injection
nozzle 41. As the ammonia flow rate increases, cooling
capacity by the ammonia flowing through the ammonia injection
nozzle 41 (that is, ability to cool the tip portion of the
ammonia injection nozzle 41) increases. Therefore, the
adjustment structure 7 can adjust the tip portion temperature
of the ammonia injection nozzle 41 by adjusting the ammonia
flow rate.
[0040]
The temperature sensor 8 detects the tip portion
temperature of the ammonia injection nozzle 41. The
temperature sensor 8 is provided at the tip portion of the
ammonia injection nozzle 41, and detects a temperature at an
installation position of the temperature sensor 8. Note that
the temperature sensor 8 may be provided on an outer peripheral side or an inner peripheral side of the tip portion of the ammonia injection nozzle 41. As the temperature sensor 8, various types of sensors that can be used in a high-temperature environment can be used. A detection result by the temperature sensor 8 is output to the control device 9.
[0041]
The control device 9 includes a central processing unit
(CPU), a ROM for storing a program and the like, a RAM as a
work area, and the like, and controls the entire combustion
device 100. In particular, the control device 9 controls an
operation of the adjustment structure 7. Specifically, the
control device 9 can adjust the ammonia flow rate and adjust
the tip portion temperature of the ammonia injection nozzle
41 by controlling the opening degree of the flow rate control
valve 71 of the adjustment structure 7.
[0042]
Fig. 3 is a flowchart illustrating an example of a flow
of processing performed by the control device 9 according to
the present embodiment. A processing flow illustrated in
Fig. 3 is executed, for example, at all times (that is,
repeatedly) in order to accurately control the tip portion
temperature of the ammonia injection nozzle 41.
[0043]
When the processing flow illustrated in Fig. 3 starts, in
step S101, the control device 9 obtains the tip portion
temperature of the ammonia injection nozzle 41. For example, the control device 9 obtains the tip portion temperature of the ammonia injection nozzle 41 from the temperature sensor
8.
[0044]
By obtaining the detection result of the temperature
sensor 8 as the tip portion temperature of the ammonia
injection nozzle 41, the tip portion temperature of the
ammonia injection nozzle 41 can be accurately obtained.
However, the control device 9 may obtain information (for
example, a temperature of atmosphere around the tip portion
of the ammonia injection nozzle 41) other than the detection
result of the temperature sensor 8 as information for
estimating the tip portion temperature of the ammonia
injection nozzle 41.
[0045]
After step S101, in step S102, the control device 9 sets
a target opening degree of the flow rate control valve 71 so
that the tip portion temperature of the ammonia injection
nozzle 41 is equal to or lower than a reference temperature.
As will be described later, the opening degree of the flow
rate control valve 71 is controlled to the target opening
degree.
[0046]
Here, the tip portion of the ammonia injection nozzle 41
is exposed to an atmosphere containing ammonia and having a
high temperature, and thus is easily nitrided. The tip
portion of the ammonia injection nozzle 41 is heated by radiant heat from the internal space of the furnace 2 in which the flame F is formed. Nitriding of the tip portion of the ammonia injection nozzle 41 is more likely to occur as the tip portion temperature is raised. The reference temperature is a temperature equal to or lower than a lower limit value of a nitriding temperature range that is a temperature range in which the nitriding of the tip portion of the ammonia injection nozzle 41 is likely to occur. That is, when the tip portion temperature of the ammonia injection nozzle 41 is equal to or lower than the reference temperature, the nitriding of the tip portion of the ammonia injection nozzle 41 is suppressed.
[0047]
In step S102, the control device 9 sets the target
opening degree of the flow rate control valve 71 on the basis
of the tip portion temperature of the ammonia injection
nozzle 41. The control device 9 sets a larger opening degree
as the target opening degree as the tip portion temperature
of the ammonia injection nozzle 41 is higher. Accordingly,
the higher the tip portion temperature of the ammonia
injection nozzle 41, the higher the ammonia flow rate, and
the higher the cooling capacity by the ammonia flowing
through the ammonia injection nozzle 41. Therefore, it is
appropriately achieved that the tip portion temperature of
the ammonia injection nozzle 41 is equal to or lower than the
reference temperature.
[0048]
After step S102, in step S103, the control device 9
controls the flow rate control valve 71 so that the opening
degree of the flow rate control valve 71 is the target
opening degree, and the processing flow illustrated in Fig. 3
ends.
[0049]
As described above, in the combustion device 100
according to the present embodiment, the adjustment structure
7 adjusts the ammonia flow rate. Accordingly, adjustment of
the tip portion temperature of the ammonia injection nozzle
41 is appropriately achieved. The control device 9 controls
the operation of the adjustment structure 7 so that the tip
portion temperature of the ammonia injection nozzle 41 is
equal to or lower than the reference temperature.
Accordingly, it is possible to suppress that the tip portion
temperature of the ammonia injection nozzle 41 is raised to
the nitriding temperature range in which nitriding is likely
to occur. Therefore, the nitriding of the ammonia injection
nozzle 41 is suppressed. Consequently, reduction in
toughness due to the nitriding of the ammonia injection
nozzle 41 is suppressed. Accordingly, for example, it is
possible to suppress a decrease in stability of combustion
due to thinning of the tip portion of the ammonia injection
nozzle 41. In addition, for example, a frequency of
repairing the ammonia injection nozzle 41 can be reduced.
[0050]
In particular, the control device 9 controls the operation of the adjustment structure 7 such that the ammonia flow rate is increased (that is, the tip portion of the ammonia injection nozzle 41 is more easily cooled) as the tip portion temperature of the ammonia injection nozzle 41 is higher. Accordingly, it is appropriately achieved that the tip portion temperature of the ammonia injection nozzle 41 is equal to or lower than the reference temperature.
[0051]
Note that since a main purpose of ammonia injected from
the ammonia injection nozzle 41 is to be used as the fuel of
the burner 4, the ammonia flow rate is controlled with
absolute priority given to ensuring the flow rate required as
the fuel. For example, when the ammonia flow rate required
for securing the cooling capacity by the ammonia flowing
through the ammonia injection nozzle 41 (that is, the ammonia
flow rate required to make the tip portion temperature of the
ammonia injection nozzle 41 equal to or lower than the
reference temperature) is lower than a flow rate required as
the fuel, the control device 9 controls the operation of the
adjustment structure 7 so that the ammonia flow rate is the
flow rate required as the fuel.
[0052]
In the above description, an example has been described
in which the adjustment structure 7 adjusts the tip portion
temperature of the ammonia injection nozzle 41 by adjusting
the ammonia flow rate. However, the adjustment structure 7
is not limited to the above example as long as it has a function of adjusting the tip portion temperature of the ammonia injection nozzle 41. Hereinafter, modifications in which adjustment structures 7A, 7B, and 7C different from the adjustment structure 7 of the combustion device 100 are used will be described.
[00531
Fig. 4 is a schematic diagram illustrating a combustion
device 100A according to a first modification. As
illustrated in Fig. 4, the combustion device 100 A is an
example in which the adjustment structure 7 is replaced with
an adjustment structure 7A in the combustion device 100
described above.
[0054]
The adjustment structure 7A adjusts a separation distance
between the injection port 41c of the ammonia injection
nozzle 41 and the internal space of the furnace 2 to adjust
the tip portion temperature of the ammonia injection nozzle
41. The adjustment structure 7A includes a drive device 71A.
[00551
The drive device 71A moves the main body 41a of the
ammonia injection nozzle 41 in the axial direction. For
example, the drive device 71A includes a mechanism that
guides movement of the main body 41a of the ammonia injection
nozzle 41 in the axial direction, and a device (for example,
a motor or the like) that generates power. Then, the drive
device 71A can move the main body 41a in the axial direction
by transmitting the power to a rear portion of the main body
41a of the ammonia injection nozzle 41.
[00561
The adjustment structure 7A can adjust the separation
distance between the injection port 41c of the ammonia
injection nozzle 41 and the internal space of the furnace 2
by moving the main body 41a of the ammonia injection nozzle
41 in the axial direction by the drive device 71A.
[0057]
As described above, the tip portion of the ammonia
injection nozzle 41 is heated by the radiant heat from the
internal space of the furnace 2 in which the flame F is
formed. As the separation distance between the injection
port 41c of the ammonia injection nozzle 41 and the internal
space of the furnace 2 is longer (that is, as the injection
port 41c is farther from the internal space of the furnace
2), the tip portion of the ammonia injection nozzle 41 is
less likely to be heated by the radiant heat from the
internal space of the furnace 2. Therefore, the adjustment
structure 7A can adjust the tip portion temperature of the
ammonia injection nozzle 41 by adjusting the separation
distance between the injection port 41c of the ammonia
injection nozzle 41 and the internal space of the furnace 2.
[00581
Similarly to the combustion device 100 described above,
the control device 9 controls an operation of the adjustment
structure 7A so that the tip portion temperature of the
ammonia injection nozzle 41 is equal to or lower than the reference temperature. Specifically, the control device 9 controls an operation of the drive device 71A such that the main body 41a of the ammonia injection nozzle 41 moves outwardly of the furnace 2 as the tip portion temperature of the ammonia injection nozzle 41 is higher. Accordingly, the control device 9 can control the operation of the adjustment structure 7A such that the injection port 41c of the ammonia injection nozzle 41 moves outwardly of the furnace 2 as the tip portion temperature of the ammonia injection nozzle 41 is higher. In other words, the control device 9 can control the operation of the adjustment structure 7A such that the separation distance between the injection port 41c and the internal space of the furnace 2 is increased as the tip portion temperature of the ammonia injection nozzle 41 is higher. Therefore, since the extent to which the tip portion of the ammonia injection nozzle 41 is heated by the radiant heat from the furnace 2 is reduced, it is appropriately achieved that the tip portion temperature of the ammonia injection nozzle 41 is equal to or lower than the reference temperature.
[00591
Fig. 5 is a schematic diagram illustrating a state in
which the tip portion temperature is higher in the combustion
device 100A according to the first modification than in an
example of Fig. 4. In an example of Fig. 5, the tip portion
temperature is higher than that in the example of Fig. 4.
Consequently, the main body 41a of the ammonia injection nozzle 41 has moved outwardly of the furnace 2 as compared with the example of Fig. 4. Accordingly, the injection port
41c of the ammonia injection nozzle 41 has moved outwardly of
the furnace 2 as compared with the example of Fig. 4.
Specifically, the axial position of the injection port 41c is
closer to the furnace 2 than the axial positions of the
injection port 42b and the injection port 43b in the example
of Fig. 4, but substantially coincides with the axial
positions of the injection port 42b and the injection port
43b in the example of Fig. 5. Therefore, the extent to which
the tip portion of the ammonia injection nozzle 41 is heated
by the radiant heat from the furnace 2 is reduced.
[00601
As described above, in the combustion device 100A
according to the first modification, the adjustment structure
7A adjusts the separation distance between the injection port
41c of the ammonia injection nozzle 41 and the internal space
of the furnace 2. Accordingly, adjustment of the tip portion
temperature of the ammonia injection nozzle 41 is
appropriately achieved. The control device 9 controls the
operation of the adjustment structure 7A so that the tip
portion temperature of the ammonia injection nozzle 41 is
equal to or lower than the reference temperature.
Accordingly, the nitriding of the ammonia injection nozzle 41
is suppressed similarly to the combustion device 100
described above.
[0061]
In particular, the control device 9 controls the
operation of the adjustment structure 7A such that the
injection port 41c of the ammonia injection nozzle 41 moves
outwardly of the furnace 2 (that is, the tip portion of the
ammonia injection nozzle 41 is less likely to be heated) as
the tip portion temperature of the ammonia injection nozzle
41 is higher. Accordingly, it is appropriately achieved that
the tip portion temperature of the ammonia injection nozzle
41 is equal to or lower than the reference temperature.
[0062]
In the above description, an example has been described
in which the drive device 71A is provided as the adjustment
structure 7A that adjusts the separation distance between the
injection port 41c of the ammonia injection nozzle 41 and the
internal space of the furnace 2, and the main body 41a of the
ammonia injection nozzle 41 is moved in the axial direction
by the drive device 71A. However, the adjustment structure
7A is not limited to the above example as long as it has a
function of adjusting the separation distance between the
injection port 41c of the ammonia injection nozzle 41 and the
internal space of the furnace 2. For example, the main body
41a of the ammonia injection nozzle 41 can expand and
contract in the axial direction, and the adjustment structure
7A may adjust the separation distance between the injection
port 41c and the internal space of the furnace 2 by expanding
and contracting the main body 41a in the axial direction by
the drive device 71A.
[0063]
Fig. 6 is a schematic diagram illustrating a combustion
device 100B according to a second modification. As
illustrated in Fig. 6, the combustion device 100B is an
example in which the adjustment structure 7 is replaced with
an adjustment structure 7B in the combustion device 100
described above.
[0064]
The adjustment structure 7B adjusts an opening area of
the injection port 41c of the ammonia injection nozzle 41 to
adjust the tip portion temperature of the ammonia injection
nozzle 41. The adjustment structure 7B includes a drive
device 71B.
[00651
In the combustion device 100B according to the second
modification, a variable portion 41d is provided at the tip
portion of the ammonia injection nozzle 41. The variable
portion 41d can adjust the opening area of the injection port
41c by being deformed. For example, the variable portion 41d
includes a plurality of members spaced apart in the
circumferential direction, and can be deformed to have an
inclined orientation in which a tip of each member is located
radially inward of a rear end thereof. As such a variable
portion 41d, for example, a structure similar to that of a
convergent-divergent nozzle can be employed.
[00661
The drive device 71B deforms the variable portion 41d of the ammonia injection nozzle 41. For example, the drive device 71B includes a device (for example, a motor or the like) that is provided at a rear end of the variable portion
41d and generates power. Then, the driving device 71B can
change an orientation of the variable portion 41d by rotating
the variable portion 41d about the rear end of the variable
portion 41d.
[0067]
The adjustment structure 7B can adjust the opening area
of the injection port 41c of the ammonia injection nozzle 41
by deforming the variable portion 41d of the ammonia
injection nozzle 41 by the drive device 71B.
[0068]
As described above, the tip portion of the ammonia
injection nozzle 41 is cooled by the ammonia flowing through
the ammonia injection nozzle 41. As the opening area of the
injection port 41c of the ammonia injection nozzle 41 is
smaller, an injection speed of the ammonia injected from the
ammonia injection nozzle 41 is higher. Therefore, the
cooling capacity by the ammonia flowing near the tip portion
of the ammonia injection nozzle 41 (that is, the ability to
cool the tip portion of the ammonia injection nozzle 41)
increases. Consequently, the adjustment structure 7B can
adjust the tip portion temperature of the ammonia injection
nozzle 41 by adjusting the opening area of the injection port
41c of the ammonia injection nozzle 41.
[0069]
Similarly to the combustion device 100 described above,
the control device 9 controls the operation of the adjustment
structure 7B so that the tip portion temperature of the
ammonia injection nozzle 41 is equal to or lower than the
reference temperature. Specifically, the control device 9
controls an operation of the drive device 71B such that a
radial position of a tip of the variable portion 41d moves
radially inwardly as the tip portion temperature of the
ammonia injection nozzle 41 is higher. Accordingly, the
control device 9 can control the operation of the adjustment
structure 7B such that the opening area of the injection port
41c of the ammonia injection nozzle 41 is reduced as the tip
portion temperature of the ammonia injection nozzle 41 is
higher. Therefore, since the injection speed of the ammonia
injected from the ammonia injection nozzle 41 is increased
and the cooling capacity by the ammonia flowing near the tip
portion of the ammonia injection nozzle 41 is increased, it
is appropriately achieved that the tip portion temperature of
the ammonia injection nozzle 41 is equal to or lower than the
reference temperature.
[0070]
Fig. 7 is a schematic diagram illustrating a state in
which the tip portion temperature is higher in the combustion
device 100B according to the second modification than in an
example of Fig. 6. In the example of Fig. 6, the variable
portion 41d of the ammonia injection nozzle 41 has a
cylindrical shape extending in the axial direction of the burner 4. In an example of Fig. 7, the tip portion temperature is higher than that in the example of Fig. 6.
Therefore, the variable portion 41d is deformed such that the
radial position of the tip of the variable portion 41d moves
radially inwardly. Accordingly, the shape of the variable
portion 41d is a tapered shape toward the tip side (a
truncated cone shape in the example of Fig. 7). Therefore,
the opening area of the injection port 41c of the ammonia
injection nozzle 41 is reduced, and the injection speed of
ammonia is increased.
[0071]
As described above, in the combustion device 100B
according to the second modification, the adjustment
structure 7B adjusts the opening area of the injection port
41c of the ammonia injection nozzle 41. Accordingly,
adjustment of the tip portion temperature of the ammonia
injection nozzle 41 is appropriately achieved. The control
device 9 controls the operation of the adjustment structure
7B so that the tip portion temperature of the ammonia
injection nozzle 41 is equal to or lower than the reference
temperature. Accordingly, the nitriding of the ammonia
injection nozzle 41 is suppressed similarly to the combustion
device 100 described above.
[0072]
In particular, the control device 9 controls the
operation of the adjustment structure 7B such that the
opening area of the injection port 41c of the ammonia injection nozzle 41 is reduced (that is, the tip portion of the ammonia injection nozzle 41 is more easily cooled) as the tip portion temperature of the ammonia injection nozzle 41 is higher. Accordingly, it is appropriately achieved that the tip portion temperature of the ammonia injection nozzle 41 is equal to or lower than the reference temperature.
[0073]
In the above description, an example has been described
in which the drive device 71B is provided as the adjustment
structure 7B that adjusts the opening area of the injection
port 41c of the ammonia injection nozzle 41, and the variable
portion 41d of the tip portion of the ammonia injection
nozzle 41 is deformed. However, the adjustment structure 7B
is not limited to the above example as long as it has a
function of adjusting the opening area of the injection port
41c of the ammonia injection nozzle 41. For example, when a
member that can move or extend radially inwardly from the
inner peripheral portion of the tip portion of the main body
41a of the ammonia injection nozzle 41 is provided, a
mechanism including the member and a drive device that drives
the member can correspond to the adjustment structure 7B. In
addition, for example, when a valve body having a tapered
shape toward the tip side is provided inside the tip portion
of the ammonia injection nozzle 41, a mechanism including the
valve body and a drive device that moves the valve body in
the axial direction can correspond to the adjustment
structure 7B.
[0074]
Fig. 8 is a schematic diagram illustrating a combustion
device 100C according to a third modification. As
illustrated in Fig. 8, the combustion device 100C is an
example in which the adjustment structure 7 is replaced with
an adjustment structure 7C in the combustion device 100
described above.
[0075]
The adjustment structure 7C includes an air pipe 71C, an
air supply source 72C, and a flow rate control valve 73C.
The air pipe 71C is disposed coaxially with the ammonia
injection nozzle 41 so as to surround the ammonia injection
nozzle 41. The air is supplied into the air pipe 71C
(specifically, into a space between the air pipe 71C and the
ammonia injection nozzle 41). The adjustment structure 7C
adjusts the tip portion temperature of the ammonia injection
nozzle 41 by adjusting a flow rate of the air (hereinafter,
also referred to as an air flow rate) in the air pipe 71C.
[0076]
The air pipe 71C includes a main body 71Ca, a supply port
71Cb, and an injection port 71Cc. The main body 71Ca has a
cylindrical shape. The main body 71Ca is disposed coaxially
with the main body 41a of the ammonia injection nozzle 41 so
as to surround the main body 41a. However, a central axis of
the main body 71Ca and a central axis of the main body 41a of
the ammonia injection nozzle 41 may not strictly coincide
with each other, and is only required to be within a predetermined range. A wall thickness, an inner diameter, and an outer diameter of the main body 71Ca are substantially constant regardless of the axial position. However, the wall thickness, the inner diameter, and the outer diameter of the main body 71Ca may change depending on the axial position.
[0077]
An axial position of a tip of the main body 71Ca
substantially coincides with the axial position of the tip of
the main body 41a of the ammonia injection nozzle 41.
However, the axial position of the tip of the main body 71Ca
may be on the front side (that is, the furnace 2 side) or the
rear side of the tip of the main body 41a of the ammonia
injection nozzle 41. An axial position of a rear end of the
main body 71Ca substantially coincides with an axial position
of a rear end of the main body 41a of the ammonia injection
nozzle 41. However, the axial position of the rear end of
the main body 71Ca may be on the front side (that is, the
furnace 2 side) or the rear side of the rear end of the main
body 41a of the ammonia injection nozzle 41.
[0078]
The supply port 71Cb is an annular opening formed between
the rear end of the main body 71Ca and the rear end of the
main body 41a of the ammonia injection nozzle 41. The supply
port 71Cb is connected to the air supply source 72C. The
injection port 71Cc is an annular opening formed between the
tip of the main body 71Ca and the tip of the main body 41a of
the ammonia injection nozzle 41. The injection port 71Cc faces the internal space of the furnace 2.
[0079]
The air is supplied from the air supply source 72C into
the main body 71Ca through the supply port 71Cb. The air
supplied into the main body 71Ca flows in a space between an
inner peripheral portion of the main body 71Ca and the outer
peripheral portion of the main body 41a of the ammonia
injection nozzle 41. The air that has passed through the
main body 71Ca is injected from the injection port 71Cc
toward the internal space of the furnace 2. The air injected
from the injection port 71Cc is used for combustion in the
furnace 2.
[0080]
The flow rate control valve 73C controls the flow rate of
the air supplied from the air supply source 72C to the air
pipe 71C. The flow rate control valve 73C is provided in a
flow path connecting the air supply source 72C and the supply
port 71Cb of the air pipe 71C. By adjusting the opening
degree of the flow rate control valve 73C, the flow rate of
ammonia supplied from the air supply source 72C to the air
pipe 71C is adjusted. Accordingly, a flow rate of the air
(that is, an air flow rate) in the air pipe 71C is adjusted.
Specifically, the air flow rate increases as the opening
degree of the flow rate control valve 73C increases.
[0081]
Here, the tip portion of the ammonia injection nozzle 41
is cooled by the air flowing through the air pipe 71C. As the air flow rate increases, cooling capacity by the air flowing through the air pipe 71C (that is, ability to cool the tip portion of the ammonia injection nozzle 41) increases. Therefore, the adjustment structure 7C can adjust the tip portion temperature of the ammonia injection nozzle
41 by adjusting the air flow rate.
[0082]
Similarly to the combustion device 100 described above,
the control device 9 controls the operation of the adjustment
structure 7C so that the tip portion temperature of the
ammonia injection nozzle 41 is equal to or lower than the
reference temperature. Specifically, the control device 9
increases the opening degree of the flow rate control valve
73C as the tip portion temperature of the ammonia injection
nozzle 41 is higher. Accordingly, the higher the tip portion
temperature of the ammonia injection nozzle 41, the higher
the air flow rate, and the higher the cooling capacity by the
air flowing through the air pipe 71C. Therefore, it is
appropriately achieved that the tip portion temperature of
the ammonia injection nozzle 41 is equal to or lower than the
reference temperature.
[0083]
As described above, in the combustion device 100C
according to the third modification, the adjustment structure
7C adjusts the flow rate of the air (that is, the air flow
rate) in the air pipe 71C. Accordingly, adjustment of the
tip portion temperature of the ammonia injection nozzle 41 is appropriately achieved. The control device 9 controls the operation of the adjustment structure 7C so that the tip portion temperature of the ammonia injection nozzle 41 is equal to or lower than the reference temperature.
Accordingly, the nitriding of the ammonia injection nozzle 41
is suppressed similarly to the combustion device 100
described above.
[0084]
In particular, the control device 9 controls the
operation of the adjustment structure 7C such that the air
flow rate is increased (that is, the tip portion of the
ammonia injection nozzle 41 is more easily cooled) as the tip
portion temperature of the ammonia injection nozzle 41 is
higher. Accordingly, it is appropriately achieved that the
tip portion temperature of the ammonia injection nozzle 41 is
equal to or lower than the reference temperature.
[0085]
Although the embodiments of the present disclosure have
been described above with reference to the accompanying
drawings, it goes without saying that the present disclosure
is not limited to such embodiments. It is obvious that a
person skilled in the art can conceive various changes or
modifications within the scope described in the claims, and
it is understood that those changes or modifications
naturally belong to the technical scope of the present
disclosure.
[0086]
In the above description, examples have been described in
which the adjustment structures (that is, any one of the
adjustment structures 7, 7A, 7B, and 7C) different from each
other are respectively provided in the combustion devices
100, 100A, 100B, and 100C. However, in the combustion
device, two or more adjustment structures among the
adjustment structures 7, 7A, 7B, and 7C may be used in
combination.
[0087]
In the above description, an example has been described
in which in the burner 4, the air injection nozzle 42 is
disposed radially outwardly of the ammonia injection nozzle
41, and the pulverized coal injection nozzle 43 is disposed
radially outwardly of the air injection nozzle 42, so that a
triple cylindrical structure is formed by the ammonia
injection nozzle 41, the air injection nozzle 42, and the
pulverized coal injection nozzle 43. However, a
configuration of the burner 4 is not limited to the above
example. For example, a position of the pulverized coal
injection nozzle 43 and a position of the ammonia injection
nozzle 41 may be replaced. Further, for example, the air
injection nozzle 42 may be omitted from the configuration of
the burner 4. In this case, for example, the burner 4 may
have a double cylindrical structure, a space on a center side
of a space divided by the double cylindrical structure may be
a flow path of ammonia, and a space radially outwardly
adjacent to the flow path of ammonia may be a flow path of the pulverized coal.
[00881
In the above description, the example in which ammonia
and pulverized coal are used as the fuel in the furnace 2 has
been described. However, the fuel used in the furnace 2 only
needs to contain at least ammonia, and is not limited to the
above example. For example, the fuel used together with
ammonia in the furnace 2 may be a fuel other than the
pulverized coal (for example, natural gas, biomass, or the
like). Further, for example, the fuel used in the furnace 2
may be only ammonia.
[00891
In the above description, examples in which the
combustion devices 100, 100A, 100B, and 100C are provided in
the furnace 2 of the boiler has been described above.
However, the furnace in which the combustion devices 100,
100A, 100B, and 100C are used may be any furnace that
generates combustion heat by burning fuel. The combustion
devices 100, 100A, 100B, and 100C can be used in various
furnaces of equipment other than the boiler.
[00901
The present disclosure contributes to stabilization of
combustion by a combustion device used for a boiler or the
like and a reduction in frequency of repairing the combustion
device, and thus can contribute to, for example, the goal 7
"Ensure access to affordable, reliable, sustainable and
modern energy" and the goal 13 "Take urgent action to combat climate change and its impacts" of the sustainable development goals (SDGs).
Reference Signs List
[0091] 1:boiler, 2:furnace, 4:burner, 7:adjustment
structure, 7A:adjustment structure, 7B:adjustment structure,
7C:adjustment structure, 9:control device, 41:ammonia
injection nozzle, 41c:injection port, 71C:air pipe,
100:combustion device, 100A:combustion device,
100B:combustion device, 100C:combustion device
Claims (6)
1. A combustion device comprising:
a burner including an ammonia injection nozzle having a
tip portion provided with an injection port facing an internal
space of a furnace;
an adjustment structure that adjusts a temperature of the
tip portion; and
a control device that controls an operation of the
adjustment structure so that the temperature of the tip portion
is equal to or lower than a reference temperature,
wherein the reference temperature is a temperature equal
to or lower than a lower limit value of a nitriding temperature
range that is a temperature range in which nitriding of the tip
portion is likely to occur.
2. The combustion device according to claim 1, wherein
the adjustment structure includes a mechanism that
adjusts a flow rate of ammoniainheammonia injection nozzle.
3. The combustion device according to claim 1 or 2, wherein
the adjustment structure includes a mechanism that
adjusts a separation distance between the injection port and the
internal space.
4. The combustion device according to any one of claims 1
to 3, wherein
the adjustment structure includes a mechanism that
adjusts an opening area of the injection port.
5. The combustion device according to any one of claims 1
to 4, comprising an air pipe disposed coaxially with the ammonia
injection nozzle so as to surround the ammonia injection nozzle,
wherein
the adjustment structure includes a mechanism that
adjusts a flow rate of air in the air pipe.
6. A boiler comprising the combustion device according to any
one of claims 1 to 5.
IHI Corporation
Patent Attorneys for the Applicant/Nominated Person
SPRUSON&FERGUSON
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-025118 | 2021-02-19 | ||
| JP2021025118 | 2021-02-19 | ||
| PCT/JP2021/039361 WO2022176275A1 (en) | 2021-02-19 | 2021-10-25 | Combustion device and boiler |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| AU2021427966A1 AU2021427966A1 (en) | 2023-06-22 |
| AU2021427966A9 AU2021427966A9 (en) | 2024-08-08 |
| AU2021427966B2 true AU2021427966B2 (en) | 2024-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021427966A Active AU2021427966B2 (en) | 2021-02-19 | 2021-10-25 | Combustion device and boiler |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20230288062A1 (en) |
| JP (1) | JP7533754B2 (en) |
| KR (1) | KR20230125279A (en) |
| AU (1) | AU2021427966B2 (en) |
| DE (1) | DE112021005781T5 (en) |
| TW (1) | TWI788122B (en) |
| WO (1) | WO2022176275A1 (en) |
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|---|---|---|---|---|
| JP2024168313A (en) * | 2023-05-23 | 2024-12-05 | 川崎重工業株式会社 | Burners and furnaces |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI87014C (en) * | 1987-12-16 | 1992-11-10 | Tampella Oy Ab | ANORDNING FOER MATNING AV PULVERFORMIG KALK TILL EN ELDSTAD AV EN PANNA |
| EP0562866B1 (en) * | 1992-03-27 | 1998-05-13 | Tokyo Gas Co., Ltd. | Method and apparatus for removing nitrogen oxides |
| JPH06272809A (en) * | 1993-03-17 | 1994-09-27 | Babcock Hitachi Kk | Combustion device and combustion method |
| US5315941A (en) * | 1993-06-07 | 1994-05-31 | The Babcock & Wilcox Company | Method and apparatus for injecting nox inhibiting reagent into the flue gas of a boiler |
| DK57996A (en) * | 1996-05-15 | 1997-11-16 | Silentor As | Muffler |
| JP3848809B2 (en) * | 1999-12-28 | 2006-11-22 | 三菱重工業株式会社 | Combustion device with additional air nozzle |
| US6254379B1 (en) * | 2000-09-27 | 2001-07-03 | Praxair Technology, Inc. | Reagent delivery system |
| US20040185399A1 (en) * | 2003-03-19 | 2004-09-23 | Goran Moberg | Urea-based mixing process for increasing combustion efficiency and reduction of nitrogen oxides (NOx) |
| JP4274358B2 (en) * | 2003-06-10 | 2009-06-03 | バブコック日立株式会社 | Flue gas denitration device and flue gas denitration method |
| US7670569B2 (en) * | 2003-06-13 | 2010-03-02 | Mobotec Usa, Inc. | Combustion furnace humidification devices, systems & methods |
| EP1672191B1 (en) * | 2003-10-02 | 2011-08-17 | Nissan Diesel Motor Co., Ltd. | Exhaust gas cleaner for engine |
| JP5471481B2 (en) * | 2010-01-18 | 2014-04-16 | 株式会社Ｉｈｉ | Oxyfuel boiler system and oxyfuel burner |
| DE102012110962A1 (en) * | 2012-11-14 | 2014-05-15 | Babcock Borsig Steinmüller Gmbh | Process and multi-fluid nozzle for the reduction of undesirable substances in a flue gas |
| CN103506000B (en) * | 2013-10-15 | 2015-07-08 | 华电电力科学研究院 | Atomization ejection device and method for SNCR (Selective Non Catalytic Reduction) denitration |
| EP3718622B1 (en) * | 2015-01-20 | 2022-08-10 | General Electric Technology GmbH | Boiler having a device for selective non-catalytic reduction comprising a lance and a lance positioning system |
| JP2018200144A (en) * | 2017-05-29 | 2018-12-20 | 株式会社Ihi | Combustion furnace and boiler |
| JP7027817B2 (en) * | 2017-11-02 | 2022-03-02 | 株式会社Ihi | Combustion device and boiler |
| US11235341B2 (en) * | 2018-05-01 | 2022-02-01 | Rheem Manufacturing Company | Heated hose nozzle |
| JP6813533B2 (en) * | 2018-05-22 | 2021-01-13 | 三菱パワー株式会社 | Burner and combustion equipment |
| JP7485500B2 (en) * | 2018-09-11 | 2024-05-16 | 株式会社Ihi | Combustion equipment and boilers |
| JP7420365B2 (en) | 2019-08-08 | 2024-01-23 | 有限会社アルファシステム | Semiconductor film-forming equipment, film-forming method thereof, and method of manufacturing semiconductor devices using the same |
| CN212005648U (en) * | 2020-04-14 | 2020-11-24 | 安徽工业大学 | A supercritical carbon dioxide coal-fired boiler with ammonia injection burner |
-
2021
- 2021-10-25 WO PCT/JP2021/039361 patent/WO2022176275A1/en not_active Ceased
- 2021-10-25 JP JP2023500527A patent/JP7533754B2/en active Active
- 2021-10-25 KR KR1020237025624A patent/KR20230125279A/en active Pending
- 2021-10-25 AU AU2021427966A patent/AU2021427966B2/en active Active
- 2021-10-25 DE DE112021005781.2T patent/DE112021005781T5/en active Pending
- 2021-12-01 TW TW110144853A patent/TWI788122B/en active
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2023
- 2023-05-19 US US18/320,338 patent/US20230288062A1/en active Pending
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|---|---|
| TW202233996A (en) | 2022-09-01 |
| AU2021427966A9 (en) | 2024-08-08 |
| KR20230125279A (en) | 2023-08-29 |
| DE112021005781T5 (en) | 2023-09-21 |
| JP7533754B2 (en) | 2024-08-14 |
| TWI788122B (en) | 2022-12-21 |
| US20230288062A1 (en) | 2023-09-14 |
| WO2022176275A1 (en) | 2022-08-25 |
| JPWO2022176275A1 (en) | 2022-08-25 |
| AU2021427966A1 (en) | 2023-06-22 |
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