TWI811556B - Liquid fuel combustion device - Google Patents

Liquid fuel combustion device Download PDF

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TWI811556B
TWI811556B TW109124277A TW109124277A TWI811556B TW I811556 B TWI811556 B TW I811556B TW 109124277 A TW109124277 A TW 109124277A TW 109124277 A TW109124277 A TW 109124277A TW I811556 B TWI811556 B TW I811556B
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liquid fuel
oxygen
supply nozzle
combustion gas
combustion
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TW109124277A
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Chinese (zh)
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TW202115347A (en
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友澤健一
伊藤貴之
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日商中外爐工業股份有限公司
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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
    • 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

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  • 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 the present invention, while atomizing liquid fuel sprayed out from a liquid fuel supplying nozzle 11 into mist-shape by first combustion gas sprayed out from an atomizing gas supplying nozzle 12 disposed at outer peripheral, and further spray out second combustion gas from a primary combustion gas supplying nozzle 13 disposed at outer peripheral for conducting primary combustion for liquid fuel, introduces oxygen into at least one of the first combustion gas and second combustion gas, and sprays out oxygen into the liquid fuel has been conducted primary combustion from an oxygen supplying nozzle 14 disposed at a position of outer peripheral side away from first combustion gas supplying nozzle.

Description

液體燃料燃燒裝置 Liquid fuel combustion device

本發明係關於一種使從液體燃料供給噴嘴之前端噴出之液體燃料與從其周圍噴出之燃燒用氣體混合並使之燃燒的液體燃料燃燒裝置。特別是，具有下述特徵點：在使從液體燃料供給噴嘴之前端噴出之液體燃料與從其周圍噴出之燃燒用氣體混合並使之燃燒的液體燃料燃燒裝置中，在使液體燃料燃燒時，對於與液體燃料混合之燃燒用氣體供給氧，以提升熱效率而謀求省能源化，並使在供給氧而使液體燃料燃燒時所產生之燃燒時的噪音降低。 The present invention relates to a liquid fuel combustion device that mixes and combusts liquid fuel sprayed from the front end of a liquid fuel supply nozzle with combustion gas sprayed from the periphery thereof. In particular, in a liquid fuel combustion device that mixes and combusts the liquid fuel ejected from the front end of the liquid fuel supply nozzle with the combustion gas ejected from the periphery, when the liquid fuel is burned, Oxygen is supplied to the combustion gas mixed with the liquid fuel to improve thermal efficiency and save energy, and to reduce combustion noise generated when oxygen is supplied to combust the liquid fuel.

以往，就液體燃料燃燒裝置而言，如專利文獻1、2等所示，係採用使油等液體燃料與燃燒用氣體一起從燃料噴霧噴嘴之前端噴霧並使之燃燒者。 Conventionally, liquid fuel combustion devices, as shown in Patent Documents 1 and 2, etc., spray and burn liquid fuel such as oil together with combustion gas from the front end of a fuel spray nozzle.

在此，在該種液體燃料燃燒裝置中，當使油等液體燃料與燃燒用空氣混合並使之燃燒時，與使之與燃燒用氧混合並使之燃燒之情形相比較，會有熱效率低之問題。 Here, in this type of liquid fuel combustion device, when liquid fuel such as oil is mixed with combustion air and burned, the thermal efficiency is lower than when it is mixed with combustion oxygen and burned. problem.

再者，在習知技術中，如專利文獻1所示，係揭示有如以下所示者：在使液體燃料之油噴出之油噴嘴的外周設置第2空氣噴嘴及第1 空氣噴嘴，而於從該等空氣噴嘴之外周側供給高溫之預熱燃燒用空氣並使油燃燒時，使第1空氣噴嘴前進後退，而可在油噴嘴與第2空氣噴嘴之間形成供冷卻空氣流通之冷卻空氣通路，並且，對第2空氣噴嘴內供給少量之低溫空氣，以防止油噴嘴之高溫化，而且，使第2空氣噴嘴之前端部比第1空氣噴嘴之前端部位於更前方，以防止油附著在第1空氣噴嘴之前端部內面，並且利用高溫之預熱燃燒用空氣而可燃燒重質油。 Furthermore, in the conventional technology, as shown in Patent Document 1, it is disclosed that a second air nozzle and a first air nozzle are provided on the outer periphery of an oil nozzle that injects liquid fuel oil. When the high-temperature preheated combustion air is supplied from the outer peripheral side of the air nozzles and the oil is burned, the first air nozzle is moved forward and backward to form a cooling chamber between the oil nozzle and the second air nozzle. A cooling air passage for air circulation, and a small amount of low-temperature air is supplied into the second air nozzle to prevent the temperature of the oil nozzle from increasing, and the front end of the second air nozzle is located further forward than the front end of the first air nozzle , to prevent oil from adhering to the inner surface of the front end of the first air nozzle, and to use high-temperature preheated combustion air to burn heavy oil.

然而，在該專利文獻1所示者中，雖如前所述利用高溫之預熱燃燒用空氣而可燃燒重質油，但如以氧使之燃燒時，無法提升液體燃料之熱效率。 However, in the patent document 1, although heavy oil can be burned by using high-temperature preheated combustion air as described above, the thermal efficiency of the liquid fuel cannot be improved when it is burned with oxygen.

再者，在如專利文獻2所示者中，提案有一種如下所述者：為了提升液體燃料之熱效率，而將供給氧之氧供給口設置在對液體燃料施加壓力並使之噴霧的液體燃料供給噴嘴的前端附近之外周，並且使從液體燃料供給噴嘴之前端噴霧的液體燃料與從前述氧供給口供給之氧混合，以使液體燃料燃燒。 Furthermore, as shown in Patent Document 2, there is proposed a liquid fuel that applies pressure to the liquid fuel and sprays it by providing an oxygen supply port for supplying oxygen in order to improve the thermal efficiency of the liquid fuel. The liquid fuel sprayed from the front end of the liquid fuel supply nozzle is mixed with the oxygen supplied from the oxygen supply port to burn the liquid fuel.

在此，如專利文獻2所示，於從液體燃料供給噴嘴對液體燃料施加壓力並使之噴霧，而使液體燃料與從設置在該液體燃料供給噴嘴的外周之氧供給口所供給之氧立即混合並使之燃燒時，雖可提升液體燃料之熱效率而謀求省能源化，但在如上方式使從液體燃料供給噴嘴所噴霧之液體燃料與氧立即混合並使之燃燒時，會有燃燒時之噪音變大之問題。 Here, as shown in Patent Document 2, the liquid fuel is sprayed by applying pressure from the liquid fuel supply nozzle, so that the liquid fuel and the oxygen supplied from the oxygen supply port provided on the outer periphery of the liquid fuel supply nozzle are immediately When the liquid fuel is mixed and burned, the thermal efficiency of the liquid fuel can be improved and energy saving can be achieved. However, if the liquid fuel sprayed from the liquid fuel supply nozzle is immediately mixed with oxygen and burned in the above manner, there will be a combustion period. The problem of loud noise.

[先前技術文獻] [Prior technical literature]

[專利文獻] [Patent Document]

專利文獻1：日本特公昭63-3206號公報 Patent document 1: Japanese Patent Publication No. 63-3206

專利文獻2：日本特開昭54-24323號公報 Patent Document 2: Japanese Patent Application Publication No. Sho 54-24323

本發明之課題係在於解決液體燃料燃燒裝置之前述問題，該液體燃料燃燒裝置係使從液體燃料供給噴嘴之前端噴出之油等液體燃料與從其周圍噴出之燃燒用氣體混合並使之燃燒者。 An object of the present invention is to solve the above-mentioned problems with a liquid fuel combustion device that mixes and combusts liquid fuel such as oil sprayed from the front end of a liquid fuel supply nozzle with combustion gas sprayed from its surroundings. .

特別是，其課題在於：在使從液體燃料供給噴嘴之前端噴出之液體燃料與從其周圍噴出之燃燒用氣體混合並使之燃燒時，對於與液體燃料混合並使之燃燒的燃燒用氣體供給氧而提升熱效率，以謀求省能源化，並且使在將氧供給至燃燒用氣體而使液體燃料燃燒時所產生之燃燒時的噪音降低。 In particular, the problem is to supply the combustion gas that is mixed with the liquid fuel and burned when the liquid fuel sprayed from the front end of the liquid fuel supply nozzle is mixed and burned with the combustion gas sprayed from the periphery. Oxygen is used to improve thermal efficiency to save energy, and to reduce combustion noise generated when oxygen is supplied to the combustion gas to combust the liquid fuel.

在本發明之液體燃料燃燒裝置中，為了要解決前述之課題，係在使從液體燃料供給噴嘴之前端噴出之液體燃料與從其周圍噴出之燃燒用氣體混合並使之燃燒的液體燃料燃燒裝置中，在前述液體燃料供給噴嘴之外周側，設置用以供給使從該液體燃料供給噴嘴之前端噴出之液體燃料以霧狀噴霧之第1燃燒用氣體的噴霧用氣體供給噴嘴，並且，在該噴霧用氣體供給噴嘴之外周側設置一次燃燒用氣體供給噴嘴，且使第2燃燒用氣體從該一次燃燒用氣體供給噴嘴噴出至前述之以霧狀噴霧之液體燃料，而使前述液體燃料進行一次燃燒，此時，使氧導入於前述之供給至噴霧用氣 體供給噴嘴之第1燃燒用氣體及供給至一次燃燒用氣體供給噴嘴之第2燃燒用氣體的至少一者，並且，在與前述一次燃燒用氣體供給噴嘴相隔離之外周側的位置設置氧供給噴嘴，且使氧從該氧供給噴嘴噴出至前述之進行一次燃燒之液體燃料，而使液體燃料進行二次燃燒。 In order to solve the above-mentioned problems, the liquid fuel combustion device of the present invention is a liquid fuel combustion device that mixes and combusts the liquid fuel sprayed from the front end of the liquid fuel supply nozzle and the combustion gas sprayed from the periphery thereof. wherein a spray gas supply nozzle for supplying a first combustion gas in a mist form is provided on the outer peripheral side of the liquid fuel supply nozzle, and in this A primary combustion gas supply nozzle is provided on the outer peripheral side of the spray gas supply nozzle, and the second combustion gas is sprayed from the primary combustion gas supply nozzle to the liquid fuel sprayed in a mist form, so that the liquid fuel is sprayed once Combustion, at this time, introduce oxygen into the aforementioned gas supplied to the spray At least one of the first combustion gas supplied to the primary combustion gas supply nozzle and the second combustion gas supplied to the primary combustion gas supply nozzle, and an oxygen supply is provided at an outer peripheral side spaced apart from the primary combustion gas supply nozzle. a nozzle, and spray oxygen from the oxygen supply nozzle to the liquid fuel undergoing primary combustion, thereby causing the liquid fuel to undergo secondary combustion.

並且，在本發明之液體燃料燃燒裝置中，係如前所述使液體燃料從液體燃料供給噴嘴之前端噴出，且藉由從設置在該液體燃料供給噴嘴之外周側的噴霧用氣體供給噴嘴噴出之第1燃燒用氣體，使如上方式從液體燃料供給噴嘴噴出之液體燃料以霧狀噴霧，並且使燃燒用氣體從設置在噴霧用氣體供給噴嘴之外周側的第2燃燒用氣體供給噴嘴噴出至該以霧狀噴霧之液體燃料，而使該液體燃料進行一次燃燒，此時，使氧導入於前述之供給至噴霧用氣體供給噴嘴之第1燃燒用氣體及供給至一次燃燒用氣體供給噴嘴之第2燃燒用氣體的至少一者而進行一次燃燒，且更進一步使氧從設置在與前述一次燃燒用氣體供給噴嘴相隔離之外周側之位置的氧供給噴嘴噴出，而使經一次燃燒之液體燃料進行二次燃燒。 Furthermore, in the liquid fuel combustion device of the present invention, as described above, the liquid fuel is sprayed from the front end of the liquid fuel supply nozzle, and the liquid fuel is sprayed from the spray gas supply nozzle provided on the outer peripheral side of the liquid fuel supply nozzle. The first combustion gas is sprayed in the form of mist from the liquid fuel sprayed from the liquid fuel supply nozzle in the above manner, and the combustion gas is sprayed from the second combustion gas supply nozzle provided on the outer peripheral side of the spray gas supply nozzle to The liquid fuel sprayed in a mist form causes the liquid fuel to undergo primary combustion. At this time, 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 subjected to primary combustion, and oxygen is further ejected from an oxygen supply nozzle provided at a position spaced from the outer peripheral side of the primary combustion gas supply nozzle, so that the primary combustion liquid The fuel undergoes secondary combustion.

如此，藉由從噴霧用氣體供給噴嘴噴出之第1燃燒用氣體，使從液體燃料供給噴嘴噴出之液體燃料以霧狀噴霧，並且使第2燃燒用氣體從一次燃燒用氣體供給噴嘴噴出至如上所述以霧狀噴霧之液體燃料，而使液體燃料進行一次燃燒，此時，當使氧導入於供給至噴霧用氣體供給噴嘴之第1燃燒用氣體及供給至一次燃燒用氣體供給噴嘴之第2燃燒用氣體的至少一者而使液體燃料進行一次燃燒，且更進一步使氧從設置在與一次燃燒用氣體供給噴嘴相隔離之外周側之位置的氧供給噴嘴噴出，而使經一次燃燒之液體燃料進行二次燃燒時，就會藉由混合有氧之第1燃燒用氣體 及/或第2燃燒用氣體，而使液體燃料有效率地進行一次燃燒，並且，藉由從氧供給噴嘴噴出之氧，而使經一次燃燒之液體燃料在廣泛之範圍內有效率地進行二次燃燒，而可提升液體燃料之熱效率並且實現省能源化。再者，還將前述第1燃燒用氣體與第2燃燒用氣體之除了氧以外者設為空氣，且在液體燃料之噴霧及/或一次燃燒中，使氧與空氣混合，藉此，與僅以氧進行噴霧或一次燃燒之情形相比較，燃燒時之噪音亦會變小。 In this way, the liquid fuel sprayed from the liquid fuel supply nozzle is sprayed in the form of mist 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 as above. The liquid fuel sprayed in a mist form causes the liquid fuel to undergo primary combustion. At this time, 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 2 combustion gases is used to cause the liquid fuel to undergo primary combustion, and further, oxygen is sprayed from an oxygen supply nozzle located at a position on the outer peripheral side separated from the primary combustion gas supply nozzle, so that the primary combustion gas is ejected from the oxygen supply nozzle. When liquid fuel undergoes secondary combustion, it is mixed with oxygen-containing primary combustion gas. and/or the second combustion gas, so that the liquid fuel can be firstly burned efficiently, and the oxygen sprayed from the oxygen supply nozzle can be used to make the firstly burned liquid fuel be efficiently secondarily burned in a wide range. Secondary combustion can improve the thermal efficiency of liquid fuel and achieve energy saving. Furthermore, the first combustion gas and the second combustion gas other than oxygen are set to air, and during the spraying and/or primary combustion of the liquid fuel, oxygen is mixed with the air, whereby only oxygen is mixed with the air. Compared with spraying or burning with oxygen, the noise during combustion will also be smaller.

再者，在本發明之液體燃料燃燒裝置中，可設置有用以調整供給至前述液體燃料供給噴嘴之液體燃料之量的燃料調整閥，並且，在前述之供給第1燃燒用氣體之噴霧用氣體供給噴嘴、及前述之供給第2燃燒用氣體之一次燃燒用氣體供給噴嘴的至少一者，可設置調整前述第1燃燒用氣體及/或第2燃燒用氣體之空氣與氧之比率的燃燒用氣體調整閥。 Furthermore, in the liquid fuel combustion device of the present invention, a fuel adjustment valve for adjusting the amount of liquid fuel supplied to the liquid fuel supply nozzle may be provided, and the spray gas for supplying the first combustion gas may be At least one of the supply nozzle and the primary combustion gas supply nozzle for supplying the second combustion gas may be provided with a combustion device for adjusting the ratio of air and oxygen in the first combustion gas and/or the second combustion gas. Gas regulating valve.

如此，即可對應於供給至液體燃料供給噴嘴之液體燃料的量或燃燒條件等，適當地控制使氧導入於從噴霧用氣體供給噴嘴或一次燃燒用氣體供給噴嘴噴出之燃燒用氣體的時間點或導入之氧的量，藉由導入的氧而使被噴霧之液體燃料在適當之狀態下進行一次燃燒，並且，還可控制從氧供給噴嘴噴出之氧的量，而適當地控制使經一次燃燒之液體燃料進行二次燃燒的狀態，可提升液體燃料之熱效率而更進一步地實現省能源化。再者，還將前述第1燃燒用氣體與第2燃燒用氣體之除了氧以外者設為空氣，且在液體燃料之噴霧及/或一次燃燒中，使氧與空氣混合，藉此，與僅以氧進行噴霧或一次燃燒之情形相比較，燃燒時之噪音亦可變小。 In this way, the timing at which oxygen is introduced into the combustion gas sprayed from the spray gas supply nozzle or the primary combustion gas supply nozzle can be appropriately controlled in accordance with the amount of liquid fuel supplied to the liquid fuel supply nozzle, combustion conditions, etc. Or the amount of oxygen introduced can cause the sprayed liquid fuel to undergo primary combustion in an appropriate state by the introduced oxygen. Furthermore, the amount of oxygen ejected from the oxygen supply nozzle can also be controlled to appropriately control the primary combustion. The state in which the burned liquid fuel undergoes secondary combustion can improve the thermal efficiency of the liquid fuel and further achieve energy saving. Furthermore, the first combustion gas and the second combustion gas other than oxygen are set to air, and during the spraying and/or primary combustion of the liquid fuel, oxygen is mixed with the air, whereby only oxygen is mixed with the air. Compared with spraying or burning with oxygen, the noise during combustion can also be reduced.

本發明之液體燃料燃燒裝置中，係藉由從噴霧用氣體供給噴嘴噴出之第1燃燒用氣體，而使如上方式從液體燃料供給噴嘴噴出之液體燃料以霧狀噴霧，並且，使第2燃燒用氣體從一次燃燒用氣體供給噴嘴噴出至如上方式以霧狀噴霧之液體燃料，而使液體燃料進行一次燃燒，此時，使氧導入至供給至噴霧用氣體供給噴嘴之第1燃燒用氣體及供給至一次燃燒用氣體供給噴嘴之第2燃燒用氣體的至少一者而使液體燃料進行一次燃燒，且更進一步使氧從設置在與一次燃燒用氣體供給噴嘴相隔離之外周側之位置的氧供給噴嘴噴出，而使經一次燃燒之液體燃料進行二次燃燒，因此，會藉由混合有氧之第1燃燒用氣體及/或第2燃燒用氣體而有效率地使液體燃料進行一次燃燒，並且，還會藉由從氧供給噴嘴噴出之氧而使經一次燃燒之液體燃料在廣泛之範圍內有效率地進行二次燃燒，而可提升液體燃料之熱效率並且實現省能源化。再者，還將前述第1燃燒用氣體與第2燃燒用氣體之除了氧以外者設為空氣，且在液體燃料之噴霧及/或一次燃燒中，使氧與空氣混合，藉此，與僅以氧進行噴霧或一次燃燒之情形相比較，燃燒時之噪音亦可變小。 In the liquid fuel combustion device of the present invention, the liquid fuel sprayed from the liquid fuel supply nozzle in the above manner is sprayed in the form of mist by the first combustion gas sprayed from the spray gas supply nozzle, and the second combustion The gas is sprayed from the primary combustion gas supply nozzle to the liquid fuel sprayed in the form of mist as described above, thereby causing the liquid fuel to undergo primary combustion. At this time, oxygen is introduced into the first combustion gas supplied to the spray gas supply nozzle and At least one of the second combustion gases supplied to the primary combustion gas supply nozzle causes primary combustion of the liquid fuel, and further causes oxygen to escape from the oxygen gas at a position located on the outer peripheral side separated from the primary combustion gas supply nozzle. The supply nozzle sprays the liquid fuel that has undergone primary combustion for secondary combustion. Therefore, the liquid fuel is efficiently primary-combusted by mixing the oxygen-containing first combustion gas and/or the second combustion gas. In addition, the oxygen sprayed from the oxygen supply nozzle causes the primary combustion liquid fuel to be efficiently subjected to secondary combustion in a wide range, thereby improving the thermal efficiency of the liquid fuel and achieving energy saving. Furthermore, the first combustion gas and the second combustion gas other than oxygen are set to air, and during the spraying and/or primary combustion of the liquid fuel, oxygen is mixed with the air, whereby only oxygen is mixed with the air. Compared with spraying or burning with oxygen, the noise during combustion can also be reduced.

結果，本發明之液體燃料燃燒裝置中，在使從液體燃料供給噴嘴之前端噴出之液體燃料與從其周圍噴出之燃燒用氣體混合並使之燃燒時，於藉由液體燃料、及混合有氧之第1燃燒用氣體及/或第2燃燒用氣體而經一次燃燒後，藉由從氧供給噴嘴噴出之氧而使經一次燃燒之液體燃料在廣泛之範圍內有效率地進行二次燃燒，而可提升液體燃料之熱效率，且謀求省能源化。再者，還將前述第1燃燒用氣體與第2燃燒用氣體之除了氧以外者設為空氣，且在液體燃料之噴霧及/或一次燃燒中，使氧與空氣混 合，藉此，與僅以氧進行噴霧或一次燃燒之情形相比較，可使燃燒時之噪音降低。 As a result, in the liquid fuel combustion device of the present invention, when the liquid fuel sprayed from the front end of the liquid fuel supply nozzle is mixed with the combustion gas sprayed from the periphery and burned, the liquid fuel is mixed with oxygen. After primary combustion of the first combustion gas and/or second combustion gas, the primary combustion liquid fuel is efficiently subjected to secondary combustion in a wide range by the oxygen sprayed from the oxygen supply nozzle, It can improve the thermal efficiency of liquid fuel and achieve energy saving. Furthermore, the first combustion gas and the second combustion gas other than oxygen may be air, and oxygen and air may be mixed during the spraying and/or primary combustion of the liquid fuel. In combination, the noise during combustion can be reduced compared to the case of spraying or primary combustion with oxygen alone.

1:爐 1: furnace

1a:爐壁 1a:furnace wall

10:液體燃料燃燒裝置 10: Liquid fuel combustion device

11:液體燃料供給噴嘴 11: Liquid fuel supply nozzle

11a:燃料調整閥 11a:Fuel adjustment valve

11b:燃料供給管 11b:Fuel supply pipe

12:噴霧用氣體供給噴嘴 12: Gas supply nozzle for spray

12a1:氧調整閥 12a1: Oxygen adjustment valve

12a2:空氣調整閥 12a2: Air adjustment valve

12b:第1燃燒用氣體供給管 12b: First combustion gas supply pipe

12b1:氧供給管 12b1:Oxygen supply pipe

12b2:空氣供給管 12b2:Air supply pipe

13:一次燃燒用氣體供給噴嘴 13: Gas supply nozzle for primary combustion

13a1:氧調整閥 13a1:Oxygen adjustment valve

13a2:空氣調整閥 13a2:Air adjustment valve

13b:第2燃燒用氣體供給管 13b: Second combustion gas supply pipe

13b1:氧供給管 13b1:Oxygen supply pipe

13b2:空氣供給管 13b2:Air supply pipe

14:氧供給噴嘴 14:Oxygen supply nozzle

14a:氧調整閥 14a:Oxygen adjustment valve

14b:氧供給管 14b:Oxygen supply pipe

圖1係在本發明之一實施形態中使用之液體燃料燃燒裝置的概略剖面說明圖。 Fig. 1 is a schematic cross-sectional explanatory view of a liquid fuel combustion device used in one embodiment of the present invention.

圖2係概略剖面說明圖，係顯示下列狀態：在使用於前述實施形態之液體燃料燃燒裝置中，對於液體燃料供給噴嘴供給適量之液體燃料並使之噴出，且使以適當比例混合有空氣與氧之第1燃燒用氣體從噴霧用氣體供給噴嘴噴出而使前述液體燃料噴霧，並且，使以適當比例混合有空氣與氧之第2燃燒用氣體從一次燃燒用氣體供給噴嘴噴出而使前述液體燃料進行一次燃燒，且更進一步使適量之氧從設置在與一次燃燒用氣體供給噴嘴相隔離之外周側的氧供給噴嘴噴出，而使前述油進行二次燃燒。 2 is a schematic cross-sectional explanatory view showing a state in which, in the liquid fuel combustion device used in the aforementioned embodiment, an appropriate amount of liquid fuel is supplied to the liquid fuel supply nozzle and ejected, and air and air are mixed in an appropriate ratio. The first combustion gas of oxygen is sprayed from the spray gas supply nozzle to spray the liquid fuel, and the second combustion gas mixed with air and oxygen in an appropriate ratio is sprayed from the primary combustion gas supply nozzle to spray the liquid fuel. The fuel undergoes primary combustion, and an appropriate amount of oxygen is ejected from an oxygen supply nozzle provided on the outer peripheral side separated from the primary combustion gas supply nozzle, thereby causing the oil to undergo secondary combustion.

圖3係概略剖面說明圖，係顯示下列狀態：在使用於前述實施形態之液體燃料燃燒裝置中，僅使適量之空氣作為第1燃燒用氣體從前述噴霧用氣體供給噴嘴噴出而使前述液體燃料噴霧，另一方面僅使適量之氧作為第2燃燒用氣體從一次燃燒用氣體供給噴嘴噴出而使液體燃料進行一次燃燒，然後，使適量之氧從氧供給噴嘴噴出而使前述液體燃料進行二次燃燒。 3 is a schematic cross-sectional explanatory view showing a state in which, in the liquid fuel combustion device used in the above embodiment, only an appropriate amount of air is sprayed as the first combustion gas from the spray gas supply nozzle to cause the liquid fuel to Spraying, on the other hand, sprays only an appropriate amount of oxygen as the second combustion gas from the primary combustion gas supply nozzle to cause the liquid fuel to undergo primary combustion, and then sprays an appropriate amount of oxygen from the oxygen supply nozzle to cause the liquid fuel to undergo secondary combustion. times burning.

圖4係概略剖面說明圖，係顯示下列狀態：在使用於前述實施形態之液體燃料燃燒裝置中，僅使適量之氧作為第1燃燒用氣體從前述噴霧用氣體供給噴嘴噴出而使前述液體燃料噴霧，另一方面僅使適量之空氣作為第 2燃燒用氣體從一次燃燒用氣體供給噴嘴噴出而使液體燃料進行一次燃燒，然後，使適量之氧從氧供給噴嘴噴出而使前述液體燃料進行二次燃燒。 4 is a schematic cross-sectional explanatory view showing a state in which, in the liquid fuel combustion device used in the above embodiment, only an appropriate amount of oxygen is ejected as the first combustion gas from the spray gas supply nozzle to make the liquid fuel Spray, on the other hand, uses only the right amount of air as a 2. The combustion gas is sprayed from the primary combustion gas supply nozzle to cause the liquid fuel to undergo primary combustion, and then an appropriate amount of oxygen is sprayed from the oxygen supply nozzle to cause the liquid fuel to undergo secondary combustion.

以下，依據附圖具體地說明本發明實施形態之液體燃料燃燒裝置。此外，本發明之液體燃料燃燒裝置並不限定於下述之實施形態所示者，而係可在不變更發明之要旨的範圍內適當地變更而實施者。 Hereinafter, the liquid fuel combustion device according to the embodiment of the present invention will be specifically described based on the drawings. In addition, the liquid fuel combustion device of the present invention is not limited to the embodiment shown below, but can be appropriately modified and implemented within the scope that does not change the gist of the invention.

在此實施形態中，如圖1所示，在設置於爐1之爐壁1a之液體燃料燃燒裝置10的中心部，設置使油等液體燃料朝向爐1內噴出之液體燃料供給噴嘴11，並且在將液體燃料導引至該液體燃料供給噴嘴11之燃料供給管11b設置燃料調整閥11a，且藉由該燃料調整閥11a來調整供給至液體燃料供給噴嘴11之液體燃料的量。 In this embodiment, as shown in FIG. 1 , a liquid fuel supply nozzle 11 for injecting liquid fuel such as oil into the furnace 1 is provided at the center of the liquid fuel combustion device 10 installed on the furnace wall 1 a of the furnace 1 , and A fuel adjustment valve 11 a is provided in the fuel supply pipe 11 b that guides the liquid fuel to the liquid fuel supply nozzle 11 , and the amount of liquid fuel supplied to the liquid fuel supply nozzle 11 is adjusted by the fuel adjustment valve 11 a.

再者，還在該液體燃料供給噴嘴11之外周側設置噴霧用氣體供給噴嘴12，且使第1燃燒用氣體從該噴霧用氣體供給噴嘴12之前端噴出，而使從前述液體燃料供給噴嘴11之前端噴出的液體燃料以霧狀噴霧。 Furthermore, a spray gas supply nozzle 12 is provided on the outer peripheral side of the liquid fuel supply nozzle 11 , and the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12 so that the first combustion gas is sprayed from the liquid fuel supply nozzle 11 The liquid fuel sprayed from the front end is sprayed in the form of mist.

在此，在將第1燃燒用氣體供給至該噴霧用氣體供給噴嘴12時，係在對噴霧用氣體供給噴嘴12導引第1燃燒用氣體之第1燃燒用氣體供給管12b，連接供給氧之氧供給管12b1及供給空氣之空氣供給管12b2，並且，設置調整供給至前述氧供給管12b1之氧的量之氧調整閥12a1，以及設置調整供給至前述空氣供給管12b2之空氣之量的空氣調整閥12a2。 Here, when the first combustion gas is supplied to the spray gas supply nozzle 12, the first combustion gas supply pipe 12b that guides the first combustion gas to the spray gas supply nozzle 12 is connected to supply oxygen. The oxygen supply pipe 12b1 and the air supply pipe 12b2 for supplying air are provided, and an oxygen adjustment valve 12a1 for adjusting the amount of oxygen supplied to the oxygen supply pipe 12b1 is provided, and an oxygen adjustment valve 12a1 for adjusting the amount of air supplied to the air supply pipe 12b2 is provided. Air regulating valve 12a2.

再者，還在前述噴霧用氣體供給噴嘴12之外周側設置一次燃燒用氣體供給噴嘴13，使第2燃燒用氣體從該一次燃燒用氣體供給噴嘴13之前端噴出至如上方式以霧狀噴霧之液體燃料，而使前述液體燃料進行一次燃燒。 Furthermore, a primary combustion gas supply nozzle 13 is also provided on the outer peripheral side of the aforesaid spray gas supply nozzle 12, so that the second combustion gas is sprayed from the front end of the primary combustion gas supply nozzle 13 to where it is sprayed in the form of mist as above. liquid fuel, and the aforementioned liquid fuel is burned once.

在此，在對該一次燃燒用氣體供給噴嘴13供給第2燃燒用氣體時，係在對一次燃燒用氣體供給噴嘴13導引第2燃燒用氣體之第2燃燒用氣體供給管13b，連接供給氧之氧供給管13b1及供給空氣之空氣供給管13b2，並且，設置調整供給至前述氧供給管13b1之氧之量的氧調整閥13a1，以及設置調整供給至前述空氣供給管13b2之空氣之量的空氣調整閥13a2。 Here, when the second combustion gas is supplied to the primary combustion gas supply nozzle 13, the supply is connected to the second combustion gas supply pipe 13b that guides the second combustion gas to the primary combustion gas supply nozzle 13. An oxygen supply pipe 13b1 for supplying oxygen and an air supply pipe 13b2 for supplying air are provided, and an oxygen adjustment valve 13a1 for adjusting the amount of oxygen supplied to the oxygen supply pipe 13b1 is provided, and an oxygen adjustment valve 13a1 is provided for adjusting the amount of air supplied to the air supply pipe 13b2. air adjustment valve 13a2.

並且，在與前述一次燃燒用氣體供給噴嘴13相隔離之外周側的爐壁1a之位置設置複數個氧供給噴嘴14，且使氧從各個氧供給噴嘴14之前端噴出至以前述方式進行一次燃燒之液體燃料，而使液體燃料進行二次燃燒。 Furthermore, a plurality of oxygen supply nozzles 14 are provided at a position on the outer peripheral side of the furnace wall 1a that is separated from the primary combustion gas supply nozzle 13, and oxygen is ejected from the front end of each oxygen supply nozzle 14 until primary combustion is performed in the above manner. of liquid fuel, causing the liquid fuel to undergo secondary combustion.

在此，在對前述各個氧供給噴嘴14供給氧時，係對各個氧供給噴嘴14分別設置導引氧之氧供給管14b，並且在各個氧供給管14b分別設置調整供給至氧供給噴嘴14之氧之量的氧調整閥14a。 Here, when supplying oxygen to each of the oxygen supply nozzles 14, each oxygen supply nozzle 14 is provided with an oxygen supply pipe 14b that guides oxygen, and each oxygen supply pipe 14b is provided with a regulator that adjusts the supply to the oxygen supply nozzle 14. Oxygen adjustment valve 14a for the amount of oxygen.

接著，針對在前述液體燃料燃燒裝置10中，使油等液體燃料從前述液體燃料供給噴嘴11之前端朝向爐1內噴出並使之燃燒之例加以說明。此外，圖中之各個閥係以反白顯示打開之情形，並以塗黑顯示關閉之情形。 Next, an example in which liquid fuel such as oil is sprayed from the front end of the liquid fuel supply nozzle 11 into the furnace 1 and burned in the liquid fuel combustion device 10 will be described. In addition, each valve in the figure is highlighted to show the open status, and blacked out to show the closed status.

在此，在圖2所示之第1例中，係藉由前述燃料調整閥11a，來調整透過燃料供給管11b供給至液體燃料供給噴嘴11之液體燃料之量，而使液體燃料從該液體燃料供給噴嘴11之前端朝向爐1內噴出，並且，使第1燃燒用氣體從前述噴霧用氣體供給噴嘴12之前端噴出，而使從液體燃料供給噴嘴11之前端噴出之液體燃料以霧狀噴霧。 Here, in the first example shown in FIG. 2, the amount of liquid fuel supplied to the liquid fuel supply nozzle 11 through the fuel supply pipe 11b is adjusted by the aforementioned fuel adjustment valve 11a, so that the liquid fuel is supplied from the liquid The front end of the fuel supply nozzle 11 is sprayed toward the inside of the furnace 1, and the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12, and the liquid fuel sprayed from the front end of the liquid fuel supply nozzle 11 is sprayed in a mist form. .

並且，在如上方式使第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，而使從液體燃料供給噴嘴11之前端噴出之液體燃料以霧狀噴霧時，在第1例中，係使氧調整閥12a1及空氣調整閥12a2分別打開預定量，而使由氧與空氣成為預定比例而成之第1燃燒用氣體從前述第1燃燒用氣體供給管12b供給至噴霧用氣體供給噴嘴12，並且，使該第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，而使液體燃料噴霧，其中該氧調整閥12a1係設置在供給氧的氧供給管12b1，該空氣調整閥12a2係設置在供給空氣之空氣供給管12b2，該氧供給管12b1與該空氣供給管12b2係連接在將第1燃燒用氣體導引至噴霧用氣體供給噴嘴12之第1燃燒用氣體供給管12b。 Furthermore, when the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12 and the liquid fuel sprayed from the front end of the liquid fuel supply nozzle 11 is sprayed in the form of mist, in the first example, The oxygen adjustment valve 12a1 and the air adjustment valve 12a2 are each opened by a predetermined amount, so that the first combustion gas composed of oxygen and air in a predetermined ratio is supplied from the first combustion gas supply pipe 12b to the spray gas supply nozzle 12. Then, the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12 to spray the liquid fuel. The oxygen adjustment valve 12a1 is provided in the oxygen supply pipe 12b1 that supplies oxygen, and the air adjustment valve 12a2 is provided in the oxygen supply pipe 12b1 that supplies oxygen. The air supply pipe 12b2 that supplies air, the oxygen supply pipe 12b1 and the air supply pipe 12b2 are connected to the first combustion gas supply pipe 12b that guides the first combustion gas to the spray gas supply nozzle 12.

再者，還使第2燃燒用氣體從設置於前述噴霧用氣體供給噴嘴12之外周側的一次燃燒用氣體供給噴嘴13的前端，朝向如前述方式以霧狀噴霧之液體燃料噴出，而使前述液體燃料進行一次燃燒。 Furthermore, the second combustion gas is also sprayed from the front end of the primary combustion gas supply nozzle 13 provided on the outer peripheral side of the spray gas supply nozzle 12 toward the liquid fuel sprayed in the form of mist as described above, so that the aforementioned Liquid fuel undergoes primary combustion.

在此，在如上所述使第2燃燒用氣體從一次燃燒用氣體供給噴嘴13之前端朝向以霧狀噴霧之液體燃料噴出，而使液體燃料進行一次燃燒時，在第1例中，係將使氧調整閥13a1及空氣調整閥13a2分別打開預定量而使氧與空氣成為預定比例所得之第2燃燒用氣體，從前述第2燃燒 用氣體供給管13b供給至一次燃燒用氣體供給噴嘴13，並且，使該第2燃燒用氣體從一次燃燒用氣體供給噴嘴13之前端朝向以霧狀噴霧之液體燃料噴出，而使液體燃料進行一次燃燒，其中該氧調整閥13a1係設置在供給氧的氧供給管13b1，該空氣調整閥13a2係設置在供給空氣之空氣供給管13b2，該氧供給管13b1與該空氣供給管13b2係連接在將第2燃燒用氣體導引至一次燃燒用氣體供給噴嘴13之第2燃燒用氣體供給管13b。此外，當於如上方式從噴霧用氣體供給噴嘴12之前端噴出之第1燃燒用氣體及從一次燃燒用氣體供給噴嘴13之前端噴出之第2燃燒用氣體採用在空氣中混合有氧之燃燒用氣體時，就會藉由如上方式混合之氧而使以霧狀噴霧之液體燃料有效率地進行一次燃燒。 Here, as described above, when the second combustion gas is sprayed from the front end of the primary combustion gas supply nozzle 13 toward the liquid fuel sprayed in a mist form to cause the liquid fuel to undergo primary combustion, in the first example, The second combustion gas obtained by opening the oxygen regulating valve 13a1 and the air regulating valve 13a2 by a predetermined amount to bring oxygen and air into a predetermined ratio is obtained from the aforementioned second combustion gas. The gas supply pipe 13b supplies the second combustion gas to the primary combustion gas supply nozzle 13, and the second combustion gas is sprayed from the front end of the primary combustion gas supply nozzle 13 toward the liquid fuel sprayed in a mist form, so that the liquid fuel undergoes primary combustion. Combustion, in which the oxygen adjustment valve 13a1 is installed in the oxygen supply pipe 13b1 that supplies oxygen, the air adjustment valve 13a2 is installed in the air supply pipe 13b2 that supplies air, and the oxygen supply pipe 13b1 and the air supply pipe 13b2 are connected to each other. The second combustion gas is guided to the second combustion gas supply pipe 13b of the primary combustion gas supply nozzle 13. In addition, when the first combustion gas sprayed from the front end of the spray gas supply nozzle 12 and the second combustion gas sprayed from the front end of the primary combustion gas supply nozzle 13 are used, combustion gases mixed with oxygen in air are used. When the fuel is gas, the liquid fuel sprayed in a mist form will be burned efficiently through the oxygen mixed in the above manner.

接著，對於如前所述從液體燃料供給噴嘴11之前端朝向爐1內噴出而經一次燃燒之液體燃料，使氧從如前所述設置在與一次燃燒用氣體供給噴嘴13相隔離之外周側之爐壁1a的位置之各個氧供給噴嘴14之前端噴出，而使經一次燃燒之液體燃料更進一步進行二次燃燒。此外，在如上方式使氧從各個氧供給噴嘴14之前端噴出，而使經一次燃燒之液體燃料更進一步進行二次燃燒時，係藉由設置在將氧導引至各個氧供給噴嘴14之各個氧供給管14b的氧調整閥14a，來調整透過各個氧供給管14b從各個氧供給噴嘴14之前端噴出之氧的量，並且使從液體燃料供給噴嘴11噴出之液體燃料適當地進行二次燃燒。 Next, for the liquid fuel that has been sprayed from the front end of the liquid fuel supply nozzle 11 toward the inside of the furnace 1 and has undergone primary combustion as described above, oxygen is provided from the outer peripheral side separated from the primary combustion gas supply nozzle 13 as described above. The front end of each oxygen supply nozzle 14 at the position of the furnace wall 1a is ejected, so that the liquid fuel that has been burned once can further undergo secondary combustion. In addition, when oxygen is ejected from the front end of each oxygen supply nozzle 14 in the above manner, and the liquid fuel that has undergone primary combustion is further subjected to secondary combustion, the oxygen is guided to each oxygen supply nozzle 14 by each of the The oxygen adjustment valve 14a of the oxygen supply pipe 14b adjusts the amount of oxygen sprayed from the front end of each oxygen supply nozzle 14 through each oxygen supply pipe 14b, and allows the liquid fuel sprayed from the liquid fuel supply nozzle 11 to appropriately undergo secondary combustion. .

在此，當使氧與空氣成為預定比例所得之燃燒用氣體從噴霧用氣體供給噴嘴12或一次燃燒用氣體供給噴嘴13噴出至如前所述從液體燃料供給噴嘴11之前端朝向爐1內噴出之液體燃料，而使前述液體燃料進 行一次燃燒時，液體燃料會有效率地進行一次燃燒。然後，當如前所述使適量之氧從各個氧供給噴嘴14之前端噴出，而使有效率地經一次燃燒之液體燃料更進一步進行二次燃燒時，即可使經一次燃燒之液體燃料在廣泛之範圍內有效率地進行二次燃燒，而使液體燃料之熱效率更進一步提升而謀求省能源化，並且，與使多量之氧一起供給至燃燒用氣體而使液體燃料燃燒之情形相比較，可使在燃燒時所產生之噪音降低。 Here, the combustion gas obtained by bringing oxygen and air into a predetermined ratio is sprayed from the spray gas supply nozzle 12 or the primary combustion gas supply nozzle 13 until it is sprayed from the front end of the liquid fuel supply nozzle 11 toward the inside of the furnace 1 as described above. liquid fuel, so that the aforementioned liquid fuel enters When a combustion is performed, the liquid fuel will be burned efficiently. Then, when an appropriate amount of oxygen is sprayed from the front end of each oxygen supply nozzle 14 as mentioned above, and the liquid fuel that has been efficiently burned once is further burned for a second time, the liquid fuel that has been burned once can be made to burn again. Secondary combustion is efficiently performed in a wide range, thereby further improving the thermal efficiency of the liquid fuel and achieving energy saving. Furthermore, compared with the case where a large amount of oxygen is supplied to the combustion gas to burn the liquid fuel, Can reduce the noise produced during combustion.

再者，即使在圖3所示之第2例中，也與前述第1例同樣地，藉由前述燃料調整閥11a來調整透過燃料供給管11b供給至液體燃料供給噴嘴11之液體燃料的量，且使液體燃料從該液體燃料供給噴嘴11之前端朝向爐1內噴出，並且，使第1燃燒用氣體從前述噴霧用氣體供給噴嘴12之前端噴出，而使從液體燃料供給噴嘴11之前端噴出之液體燃料以霧狀噴霧。 Furthermore, in the second example shown in FIG. 3 , similarly to the first example, the amount of liquid fuel supplied to the liquid fuel supply nozzle 11 through the fuel supply pipe 11 b is adjusted by the fuel adjustment valve 11 a. , and the liquid fuel is sprayed toward the furnace 1 from the front end of the liquid fuel supply nozzle 11, and the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12, so that the first combustion gas is sprayed from the front end of the liquid fuel supply nozzle 11. The liquid fuel is sprayed in the form of mist.

在此，在如上方式使第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，而使從液體燃料供給噴嘴11之前端噴出之液體燃料以霧狀噴霧時，在第2例中，係使氧調整閥12a1關閉，另一方面使空氣調整閥12a2打開預定量，而使由預定量之空氣所構成之第1燃燒用氣體從前述第1燃燒用氣體供給管12b供給至噴霧用氣體供給噴嘴12，並且，使該第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，而使液體燃料噴霧，其中該氧調整閥12a1係設置在供給氧的氧供給管12b1，該空氣調整閥12a2係設置在供給空氣之空氣供給管12b2，該氧供給管12b1與該空氣供給管12b2係連接在將第1燃燒用氣體導引至噴霧用氣體供給噴嘴12之第1燃燒用氣體供給管12b。 Here, when the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12 in the above manner, and the liquid fuel sprayed from the front end of the liquid fuel supply nozzle 11 is sprayed in the form of mist, in the second example, The oxygen adjustment valve 12a1 is closed, and the air adjustment valve 12a2 is opened by a predetermined amount, so that the first combustion gas composed of a predetermined amount of air is supplied from the first combustion gas supply pipe 12b to the spray gas supply. The first combustion gas is sprayed from the front end of the spray gas supply nozzle 12 to spray the liquid fuel. The oxygen adjustment valve 12a1 is provided in the oxygen supply pipe 12b1 that supplies oxygen. The air adjustment valve 12a2 is provided in the air supply pipe 12b2 that supplies air. The oxygen supply pipe 12b1 and the air supply pipe 12b2 are connected to the first combustion gas supply pipe 12b that guides the first combustion gas to the spray gas supply nozzle 12. .

並且，在使第2燃燒用氣體從設置在前述噴霧用氣體供給噴嘴12之外周側的一次燃燒用氣體供給噴嘴13之前端朝向如前所述以霧狀噴霧之液體燃料噴出，而使前述液體燃料進行一次燃燒時，在第2例中，係使氧調整閥13a1打開預定量，另一方面使空氣調整閥13a2關閉，而使由預定量之氧所構成之第1燃燒用氣體從前述第2燃燒用氣體供給管13b供給至一次燃燒用氣體供給噴嘴13，且使該第2燃燒用氣體從一次燃燒用氣體供給噴嘴13之前端朝向以霧狀噴霧之液體燃料噴出，而使液體燃料進行一次燃燒，其中該氧調整閥13a1係設置在供給氧的氧供給管13b1，該空氣調整閥13a2係設置在供給空氣之空氣供給管13b2，該氧供給管13b1與該空氣供給管13b2係連接在將第2燃燒用氣體導引至一次燃燒用氣體供給噴嘴13之第2燃燒用氣體供給管13b。 Then, the second combustion gas is sprayed from the front end of the primary combustion gas supply nozzle 13 provided on the outer peripheral side of the spray gas supply nozzle 12 toward the liquid fuel sprayed in a mist form as described above, so that the liquid is When the fuel is burned once, in the second example, the oxygen regulating valve 13a1 is opened by a predetermined amount, and the air regulating valve 13a2 is closed, so that the first combustion gas composed of a predetermined amount of oxygen is supplied from the above-mentioned first combustion gas. 2. The combustion gas supply pipe 13b supplies the primary combustion gas supply nozzle 13, and the second combustion gas is ejected from the front end of the primary combustion gas supply nozzle 13 toward the liquid fuel sprayed in a mist form, so that the liquid fuel is Primary combustion, in which the oxygen adjustment valve 13a1 is installed in the oxygen supply pipe 13b1 that supplies oxygen, the air adjustment valve 13a2 is installed in the air supply pipe 13b2 that supplies air, and the oxygen supply pipe 13b1 and the air supply pipe 13b2 are connected. The second combustion gas is guided to the second combustion gas supply pipe 13b of the primary combustion gas supply nozzle 13.

在此，即使在如上方式使由預定量之空氣所構成之第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，另一方面使由預定量之氧所構成之第2燃燒用氣體從一次燃燒用氣體供給噴嘴13之前端噴出時，亦與前述第1例之情形同樣地，除了空氣之外還混合適量之氧，而使以霧狀噴霧之液體燃料有效率地進行一次燃燒。 Here, even if the first combustion gas composed of a predetermined amount of air is sprayed from the front end of the spray gas supply nozzle 12 in the above manner, on the other hand, the second combustion gas composed of a predetermined amount of oxygen is sprayed from the front end of the spray gas supply nozzle 12 . When the primary combustion gas supply nozzle 13 is ejected from the front end, similarly to the above-mentioned first example, an appropriate amount of oxygen is mixed in addition to air, so that the liquid fuel sprayed in a mist form can efficiently undergo primary combustion.

然後，與前述第1例之情形同樣地，使氧從前述各個氧供給噴嘴14之前端噴出至如前所述經一次燃燒之液體燃料，並使經一次燃燒之液體燃料更進一步進行二次燃燒。 Then, similarly to the case of the first example, oxygen is sprayed from the front end of each of the oxygen supply nozzles 14 to the liquid fuel that has undergone primary combustion as described above, and the liquid fuel that has undergone primary combustion is further subjected to secondary combustion. .

如此，與前述第1例之情形同樣地，可使有效率地經一次燃燒之液體燃料更進一步在廣泛之範圍內有效率地進行二次燃燒，以更進一 步提升熱效率而謀求省能源化，並且，可使在將氧供給至燃燒用氣體而使液體燃料燃燒時所產生之燃燒時的噪音降低。 In this way, similarly to the case of the first example above, the liquid fuel that has been burned efficiently once can be further burned efficiently in a wide range, thereby further improving the efficiency of the combustion process. Thermal efficiency can be further improved to achieve energy saving, and it is also possible to reduce combustion noise generated when oxygen is supplied to the combustion gas to combust the liquid fuel.

並且，即使在圖4所示之第3例中，亦與前述第1及第2例同樣地，藉由前述燃料調整閥11a來調整透過燃料供給管11b供給至液體燃料供給噴嘴11之液體燃料的量，使液體燃料從該液體燃料供給噴嘴11之前端朝向爐1內噴出，並且，使第1燃燒用氣體從前述噴霧用氣體供給噴嘴12之前端噴出，而使從液體燃料供給噴嘴11之前端噴出之液體燃料以霧狀噴霧。 Furthermore, in the third example shown in FIG. 4 , similarly to the first and second examples, the liquid fuel supplied to the liquid fuel supply nozzle 11 through the fuel supply pipe 11 b is adjusted by the fuel adjustment valve 11 a. The amount of liquid fuel is sprayed toward the inside of the furnace 1 from the front end of the liquid fuel supply nozzle 11, and the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12, so that the first combustion gas is sprayed from the front end of the liquid fuel supply nozzle 11. The liquid fuel sprayed from the front end is sprayed in the form of mist.

在此，在如上方式使第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，而使從液體燃料供給噴嘴11之前端噴出之液體燃料以霧狀噴霧時，在第3例中，係使氧調整閥12a1打開預定量，另一方面使空氣調整閥12a2關閉，而使由預定量之氧所構成之第1燃燒用氣體從前述第1燃燒用氣體供給管12b供給至噴霧用氣體供給噴嘴12，而使該第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，以使液體燃料噴霧；其中該氧調整閥12a1係設置在供給氧的氧供給管12b1，該空氣調整閥12a2係設置在供給空氣之空氣供給管12b2，該氧供給管12b1與該空氣供給管12b2係連接在將第1燃燒用氣體導引至噴霧用氣體供給噴嘴12之第1燃燒用氣體供給管12b。 Here, when the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12 in the above manner, and the liquid fuel sprayed from the front end of the liquid fuel supply nozzle 11 is sprayed in the form of mist, in the third example, The oxygen adjustment valve 12a1 is opened by a predetermined amount, and the air adjustment valve 12a2 is closed, so that the first combustion gas composed of a predetermined amount of oxygen is supplied from the first combustion gas supply pipe 12b to the spray gas supply. nozzle 12, and the first combustion gas is sprayed from the front end of the spray gas supply nozzle 12 to spray the liquid fuel; the oxygen adjustment valve 12a1 is provided in the oxygen supply pipe 12b1 that supplies oxygen, and the air adjustment valve 12a2 The oxygen supply pipe 12b1 and the air supply pipe 12b2 are connected to the first combustion gas supply pipe 12b that guides the first combustion gas to the spray gas supply nozzle 12.

再者，在使第2燃燒用氣體從設置在前述噴霧用氣體供給噴嘴12之外周側的一次燃燒用氣體供給噴嘴13的前端朝向如前所述以霧狀噴霧之液體燃料噴出，而使前述液體燃料進行一次燃燒時，在第3例中，係使氧調整閥13a1關閉，另一方面使空氣調整閥13a2打開預定量，而使 由預定量之空氣所構成之第2燃燒用氣體從前述第2燃燒用氣體供給管13b供給至一次燃燒用氣體供給噴嘴13，且使該第1燃燒用氣體從一次燃燒用氣體供給噴嘴13之前端朝向以霧狀噴霧之液體燃料噴出，而使液體燃料進行一次燃燒，其中該氧調整閥13a1係設置在供給氧的氧供給管13b1，該空氣調整閥13a2係設置在供給空氣之空氣供給管13b2，該氧供給管13b1與該空氣供給管13b2係連接在將第2燃燒用氣體導引至一次燃燒用氣體供給噴嘴13之第2燃燒用氣體供給管13b。 Furthermore, the second combustion gas is sprayed from the front end of the primary combustion gas supply nozzle 13 provided on the outer peripheral side of the spray gas supply nozzle 12 toward the liquid fuel sprayed in a mist form as described above, so that the aforementioned When the liquid fuel undergoes primary combustion, in the third example, the oxygen adjustment valve 13a1 is closed, and the air adjustment valve 13a2 is opened by a predetermined amount. The second combustion gas composed of a predetermined amount of air is supplied from the second combustion gas supply pipe 13b to the primary combustion gas supply nozzle 13, and the first combustion gas is supplied from the primary combustion gas supply nozzle 13 The front end is sprayed toward the liquid fuel sprayed in a mist form to cause primary combustion of the liquid fuel. The oxygen regulating valve 13a1 is provided in the oxygen supply pipe 13b1 that supplies oxygen, and the air regulating valve 13a2 is provided in the air supply pipe that supplies air. 13b2, the oxygen supply pipe 13b1 and the air supply pipe 13b2 are connected to the second combustion gas supply pipe 13b that guides the second combustion gas to the primary combustion gas supply nozzle 13.

在此，在如上方式使由預定量之氧所構成之第1燃燒用氣體從噴霧用氣體供給噴嘴12之前端噴出，另一方面使由預定量之空氣所構成之第2燃燒用氣體從一次燃燒用氣體供給噴嘴13之前端噴出時，亦與前述第1例及第2例之情形同樣地，除了空氣之外還混合適量之氧，而使以霧狀噴霧之液體燃料有效率地進行一次燃燒。 Here, in the above manner, the first combustion gas composed of a predetermined amount of oxygen is sprayed from the front end of the spray gas supply nozzle 12, and on the other hand, the second combustion gas composed of a predetermined amount of air is sprayed from the primary When the combustion gas supply nozzle 13 is ejected from the front end, similarly to the above-mentioned first and second examples, an appropriate amount of oxygen is mixed in addition to air, so that the liquid fuel sprayed in a mist form can be efficiently sprayed once. Burn.

然後，與前述第1例及第2例之情形同樣地，使氧從前述各個氧供給噴嘴14之前端噴出至如前所述經一次燃燒之液體燃料，並使經一次燃燒之液體燃料更進一步進行二次燃燒。 Then, similarly to the case of the first and second examples, oxygen is sprayed from the front end of each of the oxygen supply nozzles 14 to the liquid fuel that has undergone primary combustion as described above, and the liquid fuel that has undergone primary combustion is further Perform secondary combustion.

如此，與前述第1例及第2例之情形同樣地，可使有效率地經一次燃燒之液體燃料更進一步在廣泛之範圍內有效率地進行二次燃燒，以更進一步提升熱效率而謀求省能源化，並且可使在將氧供給至燃燒用氣體而使液體燃料燃燒時所產生之燃燒時的噪音降低。 In this way, similarly to the above-mentioned first and second examples, the liquid fuel that has been efficiently burned once can be further efficiently burned twice in a wide range, so as to further improve the thermal efficiency and achieve savings. It converts energy into energy and can reduce combustion noise generated when oxygen is supplied to the combustion gas to combust the liquid fuel.

在此，於該實施形態之液體燃料燃燒裝置10中，係使供給氧之氧供給管12b1及供給空氣之空氣供給管12b2連接在用以將第1燃燒用氣體導引至設置於液體燃料供給噴嘴11之外周側之噴霧用氣體供給噴 嘴12之第1燃燒用氣體供給管12b，並且，使供給氧之氧供給管13b1及供給空氣之空氣供給管13b2連接在用以將第2燃燒用氣體導引至設置於該噴霧用氣體供給噴嘴12之外周側之一次燃燒用氣體供給噴嘴13之第2燃燒用氣體供給管13b，但是，無須使供給氧之氧供給管12b1、13b1、及供給空氣之空氣供給管12b2、13b2連接在前述第1燃燒用氣體供給管12b與第2燃燒用氣體供給管13b兩者。 Here, in the liquid fuel combustion device 10 of this embodiment, the oxygen supply pipe 12b1 for supplying oxygen and the air supply pipe 12b2 for supplying air are connected to a liquid fuel supply pipe for guiding the first combustion gas. The spray gas supply nozzle on the outer peripheral side of the nozzle 11 The first combustion gas supply pipe 12b of the nozzle 12 is connected, and the oxygen supply pipe 13b1 for supplying oxygen and the air supply pipe 13b2 for supplying air are connected to the spray gas supply pipe for guiding the second combustion gas to the spray gas supply pipe 12b. The primary combustion gas on the outer peripheral side of the nozzle 12 is supplied to the second combustion gas supply pipe 13b of the nozzle 13. However, it is not necessary to connect the oxygen supply pipes 12b1 and 13b1 for supplying oxygen and the air supply pipes 12b2 and 13b2 for supplying air. Both the first combustion gas supply pipe 12b and the second combustion gas supply pipe 13b.

雖未圖示，但亦可例如僅使供給氧之氧供給管12b1連接在用以將第1燃燒用氣體導引至噴霧用氣體供給噴嘴12之第1燃燒用氣體供給管12b，另一方面僅使供給空氣之空氣供給管13b2連接在用以將第2燃燒用氣體導引至一次燃燒用氣體供給噴嘴13之第2燃燒用氣體供給管13b，或僅使與上述情形相反之管連接。 Although not shown in the figure, for example, only the oxygen supply pipe 12b1 for supplying oxygen may be connected to the first combustion gas supply pipe 12b for guiding the first combustion gas to the spray gas supply nozzle 12. On the other hand, Only the air supply pipe 13b2 for supplying air is 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 is connected.

1:爐 1: furnace

1a:爐壁 1a:furnace wall

10:液體燃料燃燒裝置 10: Liquid fuel combustion device

11:液體燃料供給噴嘴 11: Liquid fuel supply nozzle

11a:燃料調整閥 11a:Fuel adjustment valve

11b:燃料供給管 11b:Fuel supply pipe

12:噴霧用氣體供給噴嘴 12: Gas supply nozzle for spray

12a1:氧調整閥 12a1: Oxygen adjustment valve

12a2:空氣調整閥 12a2: Air adjustment valve

12b:第1燃燒用氣體供給管 12b: First combustion gas supply pipe

12b1:氧供給管 12b1:Oxygen supply pipe

12b2:空氣供給管 12b2:Air supply pipe

13:一次燃燒用氣體供給噴嘴 13: Gas supply nozzle for primary combustion

13a1:氧調整閥 13a1:Oxygen adjustment valve

13a2:空氣調整閥 13a2:Air adjustment valve

13b:第2燃燒用氣體供給管 13b: Second combustion gas supply pipe

13b1:氧供給管 13b1:Oxygen supply pipe

13b2:空氣供給管 13b2:Air supply pipe

14:氧供給噴嘴 14:Oxygen supply nozzle

14a:氧調整閥 14a:Oxygen adjustment valve

14b:氧供給管 14b:Oxygen supply pipe

Claims (1)

一種液體燃料燃燒裝置，係使從液體燃料供給噴嘴之前端噴出之液體燃料與從其周圍噴出之燃燒用氣體混合而燃燒，在前述液體燃料供給噴嘴之外周側設有噴霧用氣體供給噴嘴，且在前述噴霧用氣體供給噴嘴之外周側設有一次燃燒用氣體供給噴嘴，以前述噴霧用氣體供給噴嘴供給第1燃燒用氣體而使前述液體燃料供給噴嘴之前端噴出之液體燃料以霧狀噴霧，對於藉由前述噴霧用氣體供給噴嘴供給前述第1燃燒用氣體而以霧狀噴霧之液體燃料，從前述一次燃燒用氣體供給噴嘴噴出第2燃燒用氣體而使前述液體燃料進行一次燃燒；對於正在進行一次燃燒的前述液體燃料，該液體燃料燃燒裝置係設有：對前述噴霧用氣體供給噴嘴供給氧的氧供給管與供給空氣的空氣供給管，從該氧供給管與該空氣供給管之至少一者對前述噴霧用氣體供給噴嘴供給前述第1燃燒用氣體；以及對前述一次燃燒用氣體供給噴嘴供給氧的氧供給管與供給空氣的空氣供給管，從該氧供給管與該空氣供給管之至少一者對前述一次燃燒用氣體供給噴嘴供給前述第2燃燒用氣體；於前述噴霧用氣體供給噴嘴與前述一次燃燒用氣體供給噴嘴之至少一者導入氧，並且，在與前述一次燃燒用氣體供給噴嘴相隔離之外周側的位置設有氧供給噴嘴，且從該氧供給噴嘴對正在進行一次燃燒的液體燃料噴出氧而使液體燃料進行二次燃燒；該液體燃料燃燒裝置係設有燃料調整閥以調整供給至前述液體燃料供給噴嘴之液體燃料之量，且在前述噴霧用氣體供給噴嘴與前述一次燃燒用氣體供給噴嘴之至少一者設有調整前述第1燃燒用氣體及/或前述第2燃燒用氣體中的空氣與氧之比率的調整閥。 A liquid fuel combustion device that mixes and combusts liquid fuel sprayed from the front end of a liquid fuel supply nozzle with combustion gas sprayed from its periphery, wherein a spray gas supply nozzle is provided on the outer peripheral side of the liquid fuel supply nozzle, and A primary combustion gas supply nozzle is provided on the outer peripheral side of the spray gas supply nozzle, and the first combustion gas is supplied through the spray gas supply nozzle so that the liquid fuel sprayed from the front end of the liquid fuel supply nozzle is sprayed in a mist form, For the liquid fuel that is sprayed in a mist form by supplying the first combustion gas through the spray gas supply nozzle, the second combustion gas is sprayed from the primary combustion gas supply nozzle to cause the liquid fuel to undergo primary combustion; The liquid fuel undergoes primary combustion, and the liquid fuel combustion device is provided with an oxygen supply pipe for supplying oxygen to the spray gas supply nozzle and an air supply pipe for supplying air, and at least one of the oxygen supply pipe and the air supply pipe is provided. One supplies the first combustion gas to the spray gas supply nozzle; and an oxygen supply pipe supplies oxygen to the primary combustion gas supply nozzle and an air supply pipe supplies air, from which the oxygen supply pipe and the air supply pipe At least one of the gas supply nozzles for primary combustion supplies the second combustion gas to the gas supply nozzle for primary combustion; oxygen is introduced into at least one of the gas supply nozzles for spraying and the gas supply nozzles for primary combustion, and between the gas supply nozzles for primary combustion and An oxygen supply nozzle is provided at an outer peripheral side spaced apart from the gas supply nozzle, and oxygen is sprayed from the oxygen supply nozzle to the liquid fuel undergoing primary combustion to cause the liquid fuel to undergo secondary combustion; the liquid fuel combustion device is provided with a fuel An adjustment valve is used to adjust the amount of liquid fuel supplied to the liquid fuel supply nozzle, and is provided with at least one of the spray gas supply nozzle and the primary combustion gas supply nozzle to adjust the first combustion gas and/or the A valve for adjusting the ratio of air to oxygen in the second combustion gas.
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