CN112594681A - Liquid fuel combustion device - Google Patents
Liquid fuel combustion device Download PDFInfo
- Publication number
- CN112594681A CN112594681A CN202011039680.XA CN202011039680A CN112594681A CN 112594681 A CN112594681 A CN 112594681A CN 202011039680 A CN202011039680 A CN 202011039680A CN 112594681 A CN112594681 A CN 112594681A
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- China
- Prior art keywords
- liquid fuel
- supply nozzle
- combustion gas
- oxygen
- combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 232
- 239000007788 liquid Substances 0.000 title claims abstract description 218
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 100
- 239000000567 combustion gas Substances 0.000 claims abstract description 187
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 139
- 239000001301 oxygen Substances 0.000 claims abstract description 139
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 139
- 239000007789 gas Substances 0.000 claims abstract description 54
- 230000002093 peripheral effect Effects 0.000 claims abstract description 25
- 239000007921 spray Substances 0.000 claims abstract description 25
- 239000003595 mist Substances 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 13
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 24
- 229910001882 dioxygen Inorganic materials 0.000 description 24
- 239000003921 oil Substances 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000009689 gas atomisation Methods 0.000 description 1
Images
Classifications
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- 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
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/02—Structural details of mounting
-
- 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
- F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
- F23D11/106—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting at the burner outlet
-
- 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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/008—Flow control devices
-
- 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
- F23D11/002—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space spraying nozzle arranged within furnace openings
-
- 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
- F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
- F23D11/108—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel intersecting downstream of the burner outlet
-
- 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, e.g. burner cooling means, noise reduction means
- F23D11/38—Nozzles; Cleaning devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
-
- 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
-
- 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
- F23C2700/00—Special arrangements for combustion apparatus using fluent fuel
- F23C2700/02—Combustion apparatus using liquid fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
In a liquid fuel combustion apparatus, when a liquid fuel discharged from a liquid fuel supply nozzle (11) is sprayed in a mist form by a first combustion gas discharged from a spray gas supply nozzle (12) provided on the outer peripheral side, and a second combustion gas is discharged from a primary combustion gas supply nozzle (13) provided on the outer peripheral side, to perform primary combustion of the liquid fuel, oxygen is introduced into at least one of the first combustion gas and the second combustion gas, and oxygen is discharged from an oxygen supply nozzle (14) provided at a position away from the outer peripheral side of the primary combustion gas supply nozzle toward the liquid fuel after primary combustion, to perform secondary combustion of the liquid fuel.
Description
Technical Field
The present invention relates to a liquid fuel combustion apparatus that mixes and combusts a liquid fuel discharged from a tip of a liquid fuel supply nozzle with combustion gas discharged from the periphery thereof. In particular, a liquid fuel combustion apparatus for mixing and combusting a liquid fuel discharged from a tip of a liquid fuel supply nozzle and a combustion gas discharged from the periphery thereof has the following characteristic points: when combusting a liquid fuel, oxygen is supplied to combustion gas mixed with the liquid fuel to improve thermal efficiency and save energy, and noise generated during combustion when combusting the liquid fuel by supplying oxygen is reduced.
Background
Conventionally, as a liquid fuel combustion apparatus, as shown in patent documents 1 and 2, for example, an apparatus is used in which a liquid fuel such as oil is sprayed together with combustion gas from a tip of a fuel spray nozzle and combusted.
Here, such a liquid fuel combustion apparatus has the following problems: when a liquid fuel such as oil is mixed with combustion air and combusted, the thermal efficiency is lower than that when the liquid fuel is mixed with combustion oxygen and combusted.
In addition, as shown in patent document 1, the following is shown in the prior art: when the oil is burned by supplying high-temperature preheating combustion air from the outer peripheral side, the first air nozzle is moved forward and backward, a cooling air passage through which cooling air passes is formed between the oil nozzle and the second air nozzle, a small amount of low-temperature air is supplied into the second air nozzle, the oil nozzle is prevented from being heated, and the tip of the second air nozzle is positioned in front of the tip of the first air nozzle, so that the oil is prevented from adhering to the inner surface of the tip of the first air nozzle, and heavy oil is burned by using high-temperature preheating combustion air.
However, as described above, the contents disclosed in patent document 1 can burn heavy oil using high-temperature preheated combustion air, but cannot improve the thermal efficiency of liquid fuel as in the case of combustion using oxygen.
In addition, as shown in patent document 2, the following is proposed: in order to improve the thermal efficiency of the liquid fuel, an oxygen supply port for supplying oxygen is provided on the outer periphery of the liquid fuel supply nozzle near the tip thereof for applying pressure to the liquid fuel and spraying the liquid fuel, and the liquid fuel sprayed from the tip of the liquid fuel supply nozzle is mixed with the oxygen supplied from the oxygen supply port to burn the liquid fuel.
Here, as shown in patent document 2, when the liquid fuel is combusted by applying pressure to the liquid fuel from the liquid fuel supply nozzle and spraying the liquid fuel, and immediately mixing the liquid fuel with oxygen supplied from an oxygen supply port provided on the outer periphery thereof, the thermal efficiency of the liquid fuel can be improved and energy saving can be achieved, but when the liquid fuel sprayed from the liquid fuel supply nozzle is immediately mixed with oxygen and combusted in this way, there is a problem that noise during combustion becomes large.
Documents of the prior art
Patent document
Patent document 1: japanese patent Japanese Kokoku No. 63-3206
Patent document 2: japanese patent laid-open No. Sho 54-24323
Disclosure of Invention
The present invention has been made to solve the above-described problems in a liquid fuel combustion apparatus that mixes and combusts a liquid fuel such as oil discharged from the tip of a liquid fuel supply nozzle with combustion gas discharged from the periphery thereof.
In particular, the following problems are set as technical problems: when a liquid fuel ejected from the tip of a liquid fuel supply nozzle is mixed with a combustion gas ejected from the periphery thereof and combusted, oxygen is supplied to the combustion gas mixed with the liquid fuel and combusted to improve thermal efficiency and save energy, and when oxygen is supplied to the combustion gas and the liquid fuel is combusted, noise during combustion is reduced.
In order to solve the above-described problems, a liquid fuel combustion apparatus according to the present invention is a liquid fuel combustion apparatus in which a liquid fuel discharged from a tip of a liquid fuel supply nozzle and a combustion gas discharged from the periphery of the liquid fuel supply nozzle are mixed and combusted, wherein a spray gas supply nozzle is provided on the outer peripheral side of the liquid fuel supply nozzle, the spray gas supply nozzle supplies a first combustion gas for spraying the liquid fuel discharged from the tip of the liquid fuel supply nozzle in a mist form, a primary combustion gas supply nozzle is provided on the outer peripheral side of the spray gas supply nozzle, a second combustion gas is discharged from the primary combustion gas supply nozzle toward the liquid fuel sprayed in the mist form, and when the liquid fuel is primarily combusted, oxygen is introduced into the first combustion gas supplied to the spray gas supply nozzle and the first combustion gas supplied to the primary combustion gas supply nozzle At least one of the second combustion gases is provided with an oxygen supply nozzle at a position on the outer peripheral side away from the primary combustion gas supply nozzle, and oxygen is ejected from the oxygen supply nozzle to the liquid fuel after the primary combustion to perform secondary combustion of the liquid fuel.
Then, in the liquid fuel combustion apparatus of the present invention, the liquid fuel is ejected from the tip of the liquid fuel supply nozzle as described above, and the liquid fuel thus ejected from the liquid fuel supply nozzle is sprayed in a mist form by the first combustion gas ejected from the spray gas supply nozzle provided on the outer peripheral side of the liquid fuel supply nozzle, and when the combustion gas is ejected from the second combustion gas supply nozzle provided on the outer peripheral side of the spray gas supply nozzle and the liquid fuel is subjected to primary combustion, oxygen is introduced into at least one of the first combustion gas supplied to the spray gas supply nozzle and the second combustion gas supplied to the primary combustion gas supply nozzle and subjected to primary combustion, and oxygen is ejected from the oxygen supply nozzle provided at a position away from the outer peripheral side of the primary combustion gas supply nozzle, and carrying out secondary combustion on the liquid fuel after the primary combustion.
In this way, when the liquid fuel is primarily combusted by spraying the liquid fuel sprayed from the liquid fuel supply nozzle with the first combustion gas sprayed from the spray gas supply nozzle and spraying the second combustion gas from the primary combustion gas supply nozzle toward the liquid fuel sprayed in the spray state, the liquid fuel is primarily combusted by introducing oxygen gas into at least one of the first combustion gas supplied to the spray gas supply nozzle and the second combustion gas supplied to the primary combustion gas supply nozzle, and the liquid fuel is primarily combusted by spraying oxygen gas from the oxygen gas supply nozzle provided at a position away from the outer peripheral side of the primary combustion gas supply nozzle, and the liquid fuel after primary combustion is secondarily combusted, the liquid fuel is efficiently primarily combusted by the first combustion gas and/or the second combustion gas mixed with oxygen gas, further, the liquid fuel after the primary combustion is efficiently subjected to the secondary combustion in a wide range by the oxygen gas discharged from the oxygen gas supply nozzle, so that the thermal efficiency of the liquid fuel can be improved and energy saving can be achieved. Further, by mixing oxygen and air in the spray and/or primary combustion of the liquid fuel using air other than the oxygen of the first combustion gas and the second combustion gas, the noise during combustion is reduced as compared with the case of spraying or primary combustion using only oxygen.
In the liquid fuel combustion apparatus according to the present invention, a fuel regulating valve is provided for regulating the amount of the liquid fuel supplied to the liquid fuel supply nozzle, and a combustion gas regulating valve is provided in at least one of the atomizing gas supply nozzle for supplying the first combustion gas and the primary combustion gas supply nozzle for supplying the second combustion gas, the combustion gas regulating valve regulating the ratio of air and oxygen in the first combustion gas and/or the second combustion gas.
In this way, the timing of introducing oxygen into the combustion gas ejected from the atomizing gas supply nozzle or the primary combustion gas supply nozzle and the amount of oxygen introduced are appropriately controlled in accordance with the amount of liquid fuel supplied to the liquid fuel supply nozzle, the combustion conditions, and the like, so that the liquid fuel to be sprayed can be primarily combusted in an appropriate state by the introduced oxygen, and the amount of oxygen ejected from the oxygen supply nozzle can be appropriately controlled, so that the state in which the liquid fuel after primary combustion is secondarily combusted can be appropriately controlled, and the thermal efficiency of the liquid fuel can be improved and energy saving can be further achieved. Further, by mixing oxygen and air in the spray and/or primary combustion of the liquid fuel using air other than the oxygen of the first combustion gas and the second combustion gas, the noise during combustion is reduced as compared with the case of spraying or primary combustion using only oxygen.
In the liquid fuel combustion apparatus according to the present invention, as described above, when the liquid fuel sprayed from the liquid fuel supply nozzle is atomized by the first combustion gas sprayed from the spray gas supply nozzle, and the second combustion gas is sprayed from the primary combustion gas supply nozzle and the liquid fuel is subjected to primary combustion, as for the liquid fuel thus atomized, oxygen is introduced into at least one of the first combustion gas supplied to the spray gas supply nozzle and the second combustion gas supplied to the primary combustion gas supply nozzle to subject the liquid fuel to primary combustion, and oxygen is sprayed from the oxygen supply nozzle provided at a position away from the outer peripheral side of the primary combustion gas supply nozzle to subject the liquid fuel after primary combustion to secondary combustion, the liquid fuel efficiently performs primary combustion by the first combustion gas and/or the second combustion gas mixed with oxygen The liquid fuel after the primary combustion is efficiently combusted in a wide range by the oxygen ejected from the oxygen supply nozzle, and the thermal efficiency of the liquid fuel can be improved and energy can be saved. Further, by mixing oxygen and air in the spray and/or primary combustion of the liquid fuel using air other than the oxygen of the first combustion gas and the second combustion gas, the noise during combustion can be reduced as compared with the case of spraying or primary combustion using only oxygen.
As a result, in the liquid fuel combustion apparatus of the present invention, when the liquid fuel discharged from the tip of the liquid fuel supply nozzle is mixed with the combustion gas discharged from the periphery thereof and combusted, after the liquid fuel is primarily combusted by the first combustion gas and/or the second combustion gas mixed with oxygen, the liquid fuel after the primary combustion is efficiently secondarily combusted in a wide range by the oxygen discharged from the oxygen supply nozzle, and thus the thermal efficiency of the liquid fuel can be improved and energy saving can be achieved. Further, by mixing oxygen and air in the spray and/or primary combustion of the liquid fuel using air other than the oxygen of the first combustion gas and the second combustion gas, the noise during combustion can be reduced as compared with the case of spraying or primary combustion using only oxygen.
Drawings
Fig. 1 is a schematic cross-sectional explanatory view of a liquid fuel combustion apparatus used in an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional explanatory diagram showing the following states: in the liquid fuel combustion apparatus used in the above embodiment, an appropriate amount of liquid fuel is supplied to and ejected from a liquid fuel supply nozzle, a first combustion gas in which air and oxygen are mixed in an appropriate ratio is ejected from an atomizing gas supply nozzle to spray the liquid fuel, a second combustion gas in which air and oxygen are mixed in an appropriate ratio is ejected from a primary combustion gas supply nozzle to perform primary combustion of the liquid fuel, and an appropriate amount of oxygen is ejected from an oxygen supply nozzle provided on an outer peripheral side away from the primary combustion gas supply nozzle to perform secondary combustion of the oil.
Fig. 3 is a schematic cross-sectional explanatory diagram showing the following states: in the liquid fuel combustion apparatus used in the above embodiment, the liquid fuel is sprayed by ejecting only an appropriate amount of air as the first combustion gas from the spray gas supply nozzle, while the liquid fuel is primarily combusted by ejecting only an appropriate amount of oxygen as the second combustion gas from the primary combustion gas supply nozzle, and thereafter the liquid fuel is secondarily combusted by ejecting an appropriate amount of oxygen from the oxygen supply nozzle.
Fig. 4 is a schematic cross-sectional explanatory diagram showing the following states: in the liquid fuel combustion apparatus used in the above embodiment, the liquid fuel is sprayed by ejecting only an appropriate amount of oxygen as the first combustion gas from the spray gas supply nozzle, while the liquid fuel is primarily combusted by ejecting only an appropriate amount of air as the second combustion gas from the primary combustion gas supply nozzle, and thereafter, the liquid fuel is secondarily combusted by ejecting an appropriate amount of oxygen from the oxygen supply nozzle.
(symbol description)
1: furnace with a heat exchanger
1 a: furnace wall
10: liquid fuel combustion device
11: liquid fuel supply nozzle
11 a: fuel regulating valve 11 b: fuel supply pipe
12: spray gas supply nozzle
12a 1: oxygen regulating valve
12a 2: air regulating valve
12 b: first combustion gas supply pipe
12b 1: oxygen supply pipe
12b 2: air supply pipe
13: gas supply nozzle for primary combustion
13a 1: oxygen regulating valve
13a 2: air regulating valve
13 b: second combustion gas supply pipe
13b 1: oxygen supply pipe
13b 2: air supply pipe
14: oxygen supply nozzle
14 a: oxygen regulating valve
14 b: oxygen supply pipe
Detailed Description
Hereinafter, a liquid fuel combustion apparatus according to an embodiment of the present invention will be specifically described with reference to the drawings. The liquid fuel combustion apparatus of the present invention is not limited to the apparatus described in the following embodiments, and can be implemented by appropriately changing the apparatus within a range not changing the gist of the present invention.
In this embodiment, as shown in fig. 1, a liquid fuel supply nozzle 11 for ejecting liquid fuel such as oil into the furnace 1 is provided in the center of a liquid fuel combustion device 10 provided in a furnace wall 1a of the furnace 1, a fuel regulating valve 11a is provided in a fuel supply pipe 11b for guiding the liquid fuel to the liquid fuel supply nozzle 11, and the amount of the liquid fuel supplied to the liquid fuel supply nozzle 11 is regulated by the fuel regulating valve 11 a.
Further, an atomizing gas supply nozzle 12 is provided on the outer peripheral side of the liquid fuel supply nozzle 11, and the first combustion gas is jetted from the tip of the atomizing gas supply nozzle 12, and the liquid fuel jetted from the tip of the liquid fuel supply nozzle 11 is atomized.
Here, when the first combustion gas is supplied to the atomizing gas supply nozzle 12, the first combustion gas supply pipe 12b for guiding the first combustion gas to the atomizing gas supply nozzle 12 is connected to an oxygen supply pipe 12b1 for supplying oxygen gas and an air supply pipe 12b2 for supplying air, an oxygen control valve 12a1 for controlling the amount of oxygen gas to be supplied is provided in the oxygen supply pipe 12b1, and an air control valve 12a2 for controlling the amount of air to be supplied is provided in the air supply pipe 12b 2.
Further, a primary combustion gas supply nozzle 13 is provided on the outer peripheral side of the atomizing gas supply nozzle 12, and the liquid fuel is primarily combusted by ejecting the second combustion gas from the tip of the primary combustion gas supply nozzle 13 toward the liquid fuel sprayed in the mist form as described above.
Here, when the second combustion gas is supplied to the primary combustion gas supply nozzle 13, the second combustion gas supply pipe 13b for guiding the second combustion gas to the primary combustion gas supply nozzle 13 is connected to an oxygen supply pipe 13b1 for supplying oxygen gas and an air supply pipe 13b2 for supplying air, an oxygen control valve 13a1 for controlling the amount of oxygen gas to be supplied is provided in the oxygen supply pipe 13b1, and an air control valve 13a2 for controlling the amount of air to be supplied is provided in the air supply pipe 13b 2.
Then, a plurality of oxygen gas supply nozzles 14 are provided at positions on the furnace wall 1a away from the outer peripheral side of the primary combustion gas supply nozzle 13, and oxygen gas is ejected from the tip of each oxygen gas supply nozzle 14 toward the liquid fuel that is primarily combusted as described above, thereby secondarily combusting the liquid fuel.
Here, in order to supply oxygen to each of the oxygen supply nozzles 14, an oxygen supply pipe 14b is provided for guiding oxygen to each of the oxygen supply nozzles 14, and each of the oxygen supply pipes 14b is provided with an oxygen adjustment valve 14a for adjusting the amount of oxygen supplied to the oxygen supply nozzle 14.
Next, an example in which liquid fuel such as oil is discharged from the tip of the liquid fuel supply nozzle 11 into the furnace 1 and burned in the liquid fuel combustion apparatus 10 will be described. Note that each valve in the figure is represented by white when opened and black when closed.
Here, in the first example shown in fig. 2, the amount of the liquid fuel supplied to the liquid fuel supply nozzle 11 through the fuel supply pipe 11b is adjusted by the fuel adjustment valve 11a so that the liquid fuel is ejected from the tip of the liquid fuel supply nozzle 11 into the furnace 1, the first combustion gas is ejected from the tip of the atomizing gas supply nozzle 12, and the liquid fuel ejected from the tip of the liquid fuel supply nozzle 11 is atomized.
Then, when the first combustion gas is ejected from the tip of the atomizing gas supply nozzle 12 and the liquid fuel ejected from the tip of the liquid fuel supply nozzle 11 is sprayed in a mist form, in the first example, the oxygen control valve 12a1 provided in the oxygen supply pipe 12b1 for supplying oxygen and the air control valve 12a2 provided in the air supply pipe 12b2 for supplying air are opened by a predetermined amount, respectively, the oxygen supply pipe 12b1 and the air supply pipe 12b2 are connected to the first combustion gas supply pipe 12b for guiding the first combustion gas to the atomizing gas supply nozzle 12, the first combustion gas in which the ratio of oxygen and air is a predetermined ratio is supplied from the first combustion gas supply pipe 12b to the atomizing gas supply nozzle 12, and the first combustion gas is ejected from the tip of the gas atomizing gas supply nozzle 12, the liquid fuel is sprayed.
The second combustion gas is ejected from the tip of the primary combustion gas supply nozzle 13 provided on the outer peripheral side of the atomizing gas supply nozzle 12 toward the liquid fuel sprayed in the mist form as described above, and the liquid fuel is subjected to primary combustion.
Here, when the liquid fuel is primarily combusted by ejecting the second combustion gas from the tip of the primary combustion gas supply nozzle 13 toward the liquid fuel sprayed in a mist form, in the first example, the oxygen control valve 13a1 provided in the oxygen supply pipe 13b1 for supplying oxygen and the air control valve 13a2 provided in the air supply pipe 13b2 for supplying air are opened by a predetermined amount, the oxygen supply pipe 13b1 and the air supply pipe 13b2 are connected to the second combustion gas supply pipe 13b for guiding the second combustion gas to the primary combustion gas supply nozzle 13, the second combustion gas in which the ratio of oxygen and air is predetermined is supplied from the second combustion gas supply pipe 13b to the primary combustion gas supply nozzle 13, and the second combustion gas is ejected from the tip of the primary combustion gas supply nozzle 13 toward the liquid fuel sprayed in a mist form, thereby causing the liquid fuel to undergo primary combustion. Further, if a combustion gas in which oxygen is mixed with air is used for the first combustion gas ejected from the tip of the atomizing gas supply nozzle 12 and the second combustion gas ejected from the tip of the primary combustion gas supply nozzle 13, the liquid fuel sprayed in the form of a mist can be efficiently combusted for the first time by the oxygen mixed in this way.
Next, as described above, the liquid fuel after the primary combustion is discharged from the tip of the liquid fuel supply nozzle 11 into the furnace 1, oxygen is discharged from the tip of each oxygen supply nozzle 14 provided at a position away from the furnace wall 1a on the outer peripheral side of the primary combustion gas supply nozzle 13 as described above, and the liquid fuel after the primary combustion is further subjected to the secondary combustion. When the liquid fuel after the primary combustion is further subjected to the secondary combustion by ejecting the oxygen gas from the tip of each oxygen supply nozzle 14 in this way, the amount of the oxygen gas flowing through each oxygen supply pipe 14b and ejected from the tip of each oxygen supply nozzle 14 is adjusted by the oxygen control valve 14a provided in each oxygen supply pipe 14b for guiding the oxygen gas to each oxygen supply nozzle 14, so that the liquid fuel ejected from the liquid fuel supply nozzle 11 is appropriately subjected to the secondary combustion.
Here, as described above, when the liquid fuel injected from the tip of the liquid fuel supply nozzle 11 into the furnace 1 is subjected to primary combustion by injecting the combustion gas having a predetermined ratio of oxygen and air from the atomizing gas supply nozzle 12 or the primary combustion gas supply nozzle 13, the liquid fuel can be efficiently subjected to primary combustion. Then, as described above, when an appropriate amount of oxygen is discharged from the tip of each oxygen supply nozzle 14 and the liquid fuel after the primary combustion is efficiently performed is further subjected to the secondary combustion, the liquid fuel after the primary combustion can be efficiently subjected to the secondary combustion in a wide range, the thermal efficiency of the liquid fuel can be further improved, energy saving can be achieved, and noise generated during combustion can be reduced as compared with a case where a large amount of oxygen is intensively supplied to the combustion gas and the liquid fuel is combusted.
In the second example shown in fig. 3, similarly to the first example, the amount of the liquid fuel supplied to the liquid fuel supply nozzle 11 through the fuel supply pipe 11b is adjusted by the fuel adjustment valve 11a so that the liquid fuel is ejected from the tip of the liquid fuel supply nozzle 11 into the furnace 1, the first combustion gas is ejected from the tip of the atomizing gas supply nozzle 12, and the liquid fuel ejected from the tip of the liquid fuel supply nozzle 11 is atomized.
Then, when the first combustion gas is ejected from the tip of the atomizing gas supply nozzle 12 and the liquid fuel ejected from the tip of the liquid fuel supply nozzle 11 is sprayed in a mist form, in the second example, the oxygen control valve 12a1 provided in the oxygen supply pipe 12b1 for supplying oxygen is closed, while the air control valve 12a2 provided in the air supply pipe 12b2 for supplying air is opened by a predetermined amount, the oxygen supply pipe 12b1 and the air supply pipe 12b2 are connected to the first combustion gas supply pipe 12b for guiding the first combustion gas to the atomizing gas supply nozzle 12, the first combustion gas composed of a predetermined amount of air is supplied from the first combustion gas supply pipe 12b to the atomizing gas supply nozzle 12 and the first combustion gas is ejected from the tip of the gas supply nozzle 12 for atomizing, and the liquid fuel is sprayed.
Here, when the liquid fuel is sprayed from the tip of the primary combustion gas supply nozzle 13 provided on the outer peripheral side of the spraying gas supply nozzle 12 toward the liquid fuel sprayed in the mist form as described above to perform primary combustion of the liquid fuel, in the second example, the oxygen control valve 13a1 provided in the oxygen supply pipe 13b1 for supplying oxygen is opened by a predetermined amount, while the air control valve 13a2 provided in the air supply pipe 13b2 for supplying air is closed, the oxygen supply pipe 13b1 and the air supply pipe 13b2 are connected to the secondary combustion gas supply pipe 13b for guiding the secondary combustion gas to the primary combustion gas supply nozzle 13, and the first combustion gas composed of a predetermined amount of oxygen is supplied from the secondary combustion gas supply pipe 13b to the primary combustion gas supply nozzle 13, and the second combustion gas is jetted from the tip of the primary combustion gas supply nozzle 13 toward the atomized liquid fuel, thereby performing primary combustion of the liquid fuel.
Here, even when the first combustion gas composed of a predetermined amount of air is ejected from the tip of the atomizing gas supply nozzle 12 and the second combustion gas composed of a predetermined amount of oxygen is ejected from the tip of the primary combustion gas supply nozzle 13 as described above, the liquid fuel sprayed in the form of a mist can be efficiently combusted in a primary combustion by mixing an appropriate amount of oxygen in addition to air, as in the case of the first example.
Then, as in the case of the first example, the liquid fuel after the primary combustion is further combusted by ejecting oxygen from the tip of each of the oxygen supply nozzles 14.
As described above, similarly to the case of the first example, the liquid fuel after the primary combustion is efficiently performed can be efficiently subjected to the secondary combustion in a wider range, the thermal efficiency can be further improved, energy can be saved, and the noise during combustion generated when the liquid fuel is combusted by supplying oxygen to the combustion gas can be reduced.
In the third example shown in fig. 4, as in the first and second examples, the amount of the liquid fuel supplied to the liquid fuel supply nozzle 11 through the fuel supply pipe 11b is adjusted by the fuel adjustment valve 11a, so that the liquid fuel is ejected from the tip of the liquid fuel supply nozzle 11 into the furnace 1, the first combustion gas is ejected from the tip of the atomizing gas supply nozzle 12, and the liquid fuel ejected from the tip of the liquid fuel supply nozzle 11 is sprayed in a mist form.
Here, when the first combustion gas is ejected from the tip of the atomizing gas supply nozzle 12 and the liquid fuel ejected from the tip of the liquid fuel supply nozzle 11 is sprayed in a mist form, in the third example, the oxygen control valve 12a1 provided in the oxygen supply pipe 12b1 for supplying oxygen is opened by a predetermined amount, while the air control valve 12a2 provided in the air supply pipe 12b2 for supplying air is closed, the oxygen supply pipe 12b1 and the air supply pipe 12b2 are connected to the first combustion gas supply pipe 12b for guiding the first combustion gas to the atomizing gas supply nozzle 12, the first combustion gas composed of a predetermined amount of oxygen is supplied from the first combustion gas supply pipe 12b to the atomizing gas supply nozzle 12 and the first combustion gas is ejected from the tip of the atomizing gas supply nozzle 12, and the liquid fuel is sprayed.
Further, when the liquid fuel is sprayed from the tip of the primary combustion gas supply nozzle 13 provided on the outer peripheral side of the spraying gas supply nozzle 12 toward the liquid fuel sprayed in the mist form as described above to perform primary combustion of the liquid fuel, in the third example, the oxygen control valve 13a1 provided in the oxygen supply pipe 13b1 for supplying oxygen is closed, while the air control valve 13a2 provided in the air supply pipe 13b2 for supplying air is opened by a predetermined amount, the oxygen supply pipe 13b1 and the air supply pipe 13b2 are connected to the secondary combustion gas supply pipe 13b for guiding the secondary combustion gas to the primary combustion gas supply nozzle 13, and the secondary combustion gas composed of a predetermined amount of air is supplied from the secondary combustion gas supply pipe 13b to the primary combustion gas supply nozzle 13, the first combustion gas is jetted from the tip of the primary combustion gas supply nozzle 13 toward the atomized liquid fuel, thereby primarily combusting the liquid fuel.
Here, even when the first combustion gas composed of a predetermined amount of oxygen is ejected from the tip of the atomizing gas supply nozzle 12 and the second combustion gas composed of a predetermined amount of air is ejected from the tip of the primary combustion gas supply nozzle 13 as described above, the liquid fuel sprayed in a mist form can be efficiently combusted in a primary combustion by mixing an appropriate amount of oxygen in addition to air, as in the case of the first and second examples described above.
Thereafter, as in the case of the first and second examples, the liquid fuel after the primary combustion as described above is subjected to secondary combustion while oxygen is ejected from the tip of each of the oxygen supply nozzles 14.
As described above, similarly to the first and second examples, the liquid fuel after the primary combustion is efficiently combusted in a wider range, and the heat efficiency can be further improved to save energy, and the noise during combustion generated when the liquid fuel is combusted by supplying oxygen to the combustion gas can be reduced.
In the liquid fuel combustion apparatus 10 of the present embodiment, the first combustion gas supply pipe 12b for guiding the first combustion gas to the atomizing gas supply nozzle 12 provided on the outer peripheral side of the liquid fuel supply nozzle 11 is connected to the oxygen gas supply pipe 12b1 for supplying oxygen gas and the air supply pipe 12b2 for supplying air, and a second combustion gas supply pipe 13b for guiding the second combustion gas to the primary combustion gas supply nozzle 13 provided on the outer peripheral side of the atomizing gas supply nozzle 12 is connected to an oxygen gas supply pipe 13b1 for supplying oxygen gas and an air supply pipe 13b2 for supplying air, however, it is not necessary to connect the oxygen gas supply pipes 12b1 and 13b1 for supplying oxygen gas and the air supply pipes 12b2 and 13b2 for supplying air to both of the first combustion gas supply pipe 12b and the second combustion gas supply pipe 13 b.
Although not shown, for example, only the oxygen gas supply pipe 12b1 for supplying oxygen gas may be connected to the first combustion gas supply pipe 12b for guiding the first combustion gas to the atomizing gas supply nozzle 12, and only the gas supply pipe 13b2 for supplying air may be connected to the second combustion gas supply pipe 13b for guiding the second combustion gas to the primary combustion gas supply nozzle 13, or only the opposite pipe may be connected.
Claims (2)
1. A liquid fuel combustion apparatus for mixing and combusting a liquid fuel discharged from a tip of a liquid fuel supply nozzle with a combustion gas discharged from the periphery thereof,
a spray gas supply nozzle that supplies a first combustion gas for spraying a liquid fuel sprayed from a tip of the liquid fuel supply nozzle in a mist form is provided on an outer peripheral side of the liquid fuel supply nozzle, a primary combustion gas supply nozzle is provided on an outer peripheral side of the spray gas supply nozzle, a second combustion gas is sprayed from the primary combustion gas supply nozzle toward the liquid fuel sprayed in a mist form, and oxygen is introduced into at least one of the first combustion gas supplied to the spray gas supply nozzle and the second combustion gas supplied to the primary combustion gas supply nozzle when the liquid fuel is subjected to primary combustion, and an oxygen supply nozzle is provided at a position away from the outer peripheral side of the primary combustion gas supply nozzle, and ejecting oxygen from the oxygen supply nozzle to the liquid fuel that is primarily combusted, thereby secondarily combusting the liquid fuel.
2. Liquid fuel combustion device according to claim 1,
a fuel regulating valve for regulating the amount of the liquid fuel supplied to the liquid fuel supply nozzle is provided, and a regulating valve for regulating the ratio of air and oxygen in the first combustion gas and/or the second combustion gas is provided in at least one of the atomizing gas supply nozzle for supplying the first combustion gas and the primary combustion gas supply nozzle for supplying the second combustion gas.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-181101 | 2019-10-01 | ||
| JP2019181101A JP6957574B2 (en) | 2019-10-01 | 2019-10-01 | Liquid fuel combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112594681A true CN112594681A (en) | 2021-04-02 |
| CN112594681B CN112594681B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011039680.XA Active CN112594681B (en) | 2019-10-01 | 2020-09-28 | Liquid fuel combustion device |
Country Status (4)
| Country | Link |
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| JP (1) | JP6957574B2 (en) |
| KR (1) | KR20210039278A (en) |
| CN (1) | CN112594681B (en) |
| TW (1) | TWI811556B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2022152985A (en) | 2021-03-29 | 2022-10-12 | 日本碍子株式会社 | honeycomb filter |
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| CN101201163A (en) * | 2006-12-04 | 2008-06-18 | 普莱克斯技术有限公司 | Combustion with variable oxidant low NOx burner |
| CN103822207A (en) * | 2012-11-16 | 2014-05-28 | 航天长征化学工程股份有限公司 | Variable pressure and variable working condition oil burner |
| CN107763663A (en) * | 2016-08-23 | 2018-03-06 | 翼特新能源科技（上海）有限公司 | Solid fuel combustion apparatus and its application method |
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| JPS5424323A (en) | 1977-07-25 | 1979-02-23 | Nippon Steel Corp | External mixing type oil burner |
| JPS5847904A (en) * | 1981-09-14 | 1983-03-19 | Osaka Gas Co Ltd | Oil burner |
| JPS633206A (en) | 1986-06-23 | 1988-01-08 | Asahi Optical Co Ltd | Optical thickness measuring instrument |
| JPH07233920A (en) * | 1994-02-23 | 1995-09-05 | Chugai Ro Co Ltd | Burning method for oxygen burner |
| US5762486A (en) * | 1996-02-21 | 1998-06-09 | Praxair Technology, Inc. | Toroidal vortex combustion for low heating value liquid |
| JPH11294722A (en) * | 1998-04-16 | 1999-10-29 | Osaka Gas Co Ltd | Oxygen burner |
| US6705117B2 (en) * | 1999-08-16 | 2004-03-16 | The Boc Group, Inc. | Method of heating a glass melting furnace using a roof mounted, staged combustion oxygen-fuel burner |
| JP2001263608A (en) * | 2000-03-22 | 2001-09-26 | Nippon Sanso Corp | Burner for oxygen-enriched liquid fuel |
| JP4323686B2 (en) * | 2000-06-16 | 2009-09-02 | 大陽日酸株式会社 | Low NOx burner and its operation method |
| JP5437734B2 (en) * | 2009-08-07 | 2014-03-12 | 株式会社荏原製作所 | Combustion exhaust gas treatment equipment |
| JP5485193B2 (en) * | 2011-01-26 | 2014-05-07 | 大陽日酸株式会社 | Burner burning method |
| CN107238085A (en) * | 2017-06-30 | 2017-10-10 | 中国恩菲工程技术有限公司 | Liquid waste molten bath submerged combustion gun system |
-
2019
- 2019-10-01 JP JP2019181101A patent/JP6957574B2/en active Active
-
2020
- 2020-07-17 TW TW109124277A patent/TWI811556B/en active
- 2020-07-23 KR KR1020200091434A patent/KR20210039278A/en not_active Application Discontinuation
- 2020-09-28 CN CN202011039680.XA patent/CN112594681B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201163A (en) * | 2006-12-04 | 2008-06-18 | 普莱克斯技术有限公司 | Combustion with variable oxidant low NOx burner |
| CN201242149Y (en) * | 2006-12-04 | 2009-05-20 | 普莱克斯技术有限公司 | Burner system |
| CN103822207A (en) * | 2012-11-16 | 2014-05-28 | 航天长征化学工程股份有限公司 | Variable pressure and variable working condition oil burner |
| CN107763663A (en) * | 2016-08-23 | 2018-03-06 | 翼特新能源科技（上海）有限公司 | Solid fuel combustion apparatus and its application method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20210039278A (en) | 2021-04-09 |
| JP2021055970A (en) | 2021-04-08 |
| CN112594681B (en) | 2024-04-05 |
| JP6957574B2 (en) | 2021-11-02 |
| TW202115347A (en) | 2021-04-16 |
| TWI811556B (en) | 2023-08-11 |
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