CN101501396A - Two-fluid spray burner - Google Patents

Two-fluid spray burner Download PDF

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Publication number
CN101501396A
CN101501396A CNA2007800299187A CN200780029918A CN101501396A CN 101501396 A CN101501396 A CN 101501396A CN A2007800299187 A CNA2007800299187 A CN A2007800299187A CN 200780029918 A CN200780029918 A CN 200780029918A CN 101501396 A CN101501396 A CN 101501396A
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CN
China
Prior art keywords
liquid fuel
atomizing
fuel tank
burner
fluid
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.)
Pending
Application number
CNA2007800299187A
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Chinese (zh)
Inventor
中川庆一
松田直彦
野岛繁
八木克记
后藤晃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Eneos Corp
Original Assignee
Mitsubishi Heavy Industries Ltd
Nippon Oil Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd, Nippon Oil Corp filed Critical Mitsubishi Heavy Industries Ltd
Publication of CN101501396A publication Critical patent/CN101501396A/en
Pending legal-status Critical Current

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    • 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
    • F23D11/107—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 at least one of both being subjected to a swirling motion
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/28—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid
    • B05B7/30—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid the first liquid or other fluent material being fed by gravity, or sucked into the carrying fluid
    • 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
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • F23D11/404—Flame tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel

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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)
  • Spray-Type Burners (AREA)
  • Nozzles (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)

Abstract

A two-fluid spray burner capable of stably supplying liquid fuel without a significant variation in the supply flow rate of the liquid fuel even if the supply flow rate is low. In the two-fluid spray burner (11) for atomizing the liquid fuel (24) by air for atomization and combusting the atomized fuel, the burner (11) has a liquid fuel tank (19) provided with a side section (20) having a tubular shape and a bottom section (21) provided at the lower end of the side section (20). The liquid fuel tank (19) contains the liquid fuel (24) supplied from a liquid fuel supply pipe (25) and allows the liquid fuel (24) to flow out of a liquid fuel outflow hole (22) located below a liquid surface (23) of the contained liquid fuel (24) and formed in the bottom section (21). The liquid fuel (24) flowing out of the liquid fuel outflow hole (22) of the liquid fuel tank (19) is atomized by gas (46) for atomization and combusted.

Description

Two-fluid spray burner
Technical field
The present invention relates to a kind of two-fluid spray burner, this burner combustion utilization atomizing liquid fuel of gas atomization.
Background technology
The burning of a kind of two-fluid spray burner utilizes atomizing with the liquid fuel of gas atomization and be used as the thermal source of the modifier of fuel electricity generation system for example etc.
In the two-fluid spray burner of routine, liquid fuel is supplied to and discharges from the end of liquid fuel supply pipe via the pump of liquid fuel supply pipe from the liquid fuel supply system.The liquid fuel of discharging from the liquid fuel supply pipe mixes with atomizing air, so that make liquid fuel atomization and combustion of liquid fuel.
Patent documentation 1: the Japan Patent spy opens 2002-224592 number
Summary of the invention
The technical problem that solves
Yet above-mentioned conventional two-fluid spray burner is supplied to and designs from pump with high flow capacity at the hypothesis liquid fuel.Therefore, when using conventional two-fluid spray burner under the very low state of the liquid fuel flow of being supplied with, intermittently (with mode of vibration) from pump feed fluid fuel, and liquid fuel is intermittently discharged from the end 1A of the liquid fuel supply pipe 1 shown in Figure 14 (a) thus.Therefore, shown in Figure 14 (b), the flow of the liquid fuel of being supplied with fluctuates widely.This has hindered the stable supplying of liquid fuel and has made and has been difficult to realize smooth combustion, produces unburned exhaust thus or causes accident to be caught fire.
A solution at this problem is to improve the pump performance of liquid fuel supply system, so that or even also can stably supply with fuel under low discharge.Yet this solution needs expensive pump and can increase the cost of device.
Therefore, in view of afore-mentioned, the purpose of this invention is to provide a kind of two-fluid spray burner, this two-fluid spray burner is when promptly the flow of the liquid fuel supplied with of box lunch is very low, also fluctuating widely of the liquid fuel flow supplied with of feed fluid fuel and can not causing stably.
Technical scheme
For first two-fluid spray burner of inventing that solves foregoing problems is to utilize atomizing to make liquid fuel atomization and the two-fluid spray burner of the atomized liquid fuel that burns with gas, it is characterized in that comprising:
Liquid fuel tank, it comprises: tubular sidepiece and the bottom that is arranged on this sidepiece lower end, this liquid fuel tank stores from the liquid fuel of liquid fuel supply pipe supply and from one or more liquid fuel taps and discharges stored liquid fuel, these one or more liquid fuel taps are in the position of the liquid level that is lower than stored liquid fuel open side or bottom, and this burner is characterised in that
Utilize atomizing to make the liquid fuel atomization of discharging from the liquid fuel tap of liquid fuel tank with gas, and this liquid fuel that burns.
The two-fluid spray burner of second invention is the two-fluid spray burner of first invention, it is characterized in that, and the bottom split shed of liquid fuel tap liquid fuel within case,
This burner is characterised in that also and comprises:
Be formed on the sidepiece of liquid fuel tank and around the tubular atomizing gas passage between the urceolus of the periphery of this sidepiece; And
Be arranged on the second fluid nozzle of the lower end of urceolus, this second fluid nozzle comprises nozzle body and last atomizing gas introduction part down, and this second fluid nozzle has:
Two fluids that are formed in the middle body with the gas introduction part at nozzle body and atomizing below the liquid fuel tap collaborate spatial portion;
Be formed on the one or more spray holes in the nozzle body, these spray holes are led to two fluids interflow spatial portion; And
Be formed on the one or more grooves that atomize with in the gas introduction part, these grooves make two fluids interflow spatial portion and atomizing communicate with each other with gas passage,
This burner is characterised in that
Liquid fuel tank is installed in atomizing with on the gas introduction part, and
From the liquid fuel tap discharge and the liquid fuel that flows into two fluids interflow spatial portion with flow down and flow through described atomizing is imported into described two fluids interflow spatial portion with the groove of gas introduction part described atomizing along described atomizing with gas passage and collaborate at described two fluids interflow spatial portion with gas, then, described liquid fuel and atomizing are together injected from described spray holes with gas.
Two-fluid spray burner according to the 3rd invention is the two-fluid spray burner of second invention, it is characterized in that
The bottom surface of the bottom of liquid fuel tank forms the taper surface part of taper,
Atomize and also form the taper surface part of taper with the end face of gas introduction part, and
The taper surface of described liquid fuel tank part in abutting connection with and be coupled under the state of described atomizing with the taper surface part of gas introduction part, described liquid fuel tank is installed in described atomizing with on the gas introduction part.
The two-fluid spray burner of the 4th invention is the two-fluid spray burner of first invention, it is characterized in that, and the bottom split shed of liquid fuel tap liquid fuel within case, and this burner is characterised in that also and comprises:
Be formed on the sidepiece of liquid fuel tank and around the tubular atomizing gas passage between the urceolus of the periphery of this sidepiece; And
Be arranged on the second fluid nozzle of the lower end of urceolus, this second fluid nozzle has:
Liquid fuel within tap below is formed on the two fluids interflow spatial portion in the middle body, and
Form one or more spray holes of leading to two fluids interflow spatial portion,
This burner is characterised in that
The bottom surface of the bottom of liquid fuel tank forms the taper surface part of taper,
The end face of second fluid nozzle also forms the taper surface part of taper,
The taper surface of described liquid fuel tank part in abutting connection with and be coupled under the state of taper surface part of described second fluid nozzle, described liquid fuel tank is installed on the described second fluid nozzle,
One or more grooves form the place, bottom of liquid fuel within case, and these grooves make atomizing communicate with each other with gas passage and two fluids interflow spatial portion, and
Discharge and the liquid fuel that flows into described two fluids interflow spatial portion is imported into the described atomizing of described two fluids interflow spatial portion and collaborates at described two fluids interflow spatial portion with gas with the groove of the bottom that flows down, then flows through described liquid fuel tank along described atomizing with gas passage from described liquid fuel tap, then, described liquid fuel and described atomizing are together injected from described spray holes with gas.
The two-fluid spray burner of the 5th invention is any two-fluid spray burner in second to the 4th invention, it is characterized in that
Two fluids interflow spatial portion has round-shaped in vertical view, and
Atomizing collaborate along two fluids in the vertical view with the groove of the bottom of the groove of gas introduction part or liquid fuel tank spatial portion circumference tangential direction and form.
The two-fluid spray burner of the 6th invention is according to any two-fluid spray burner in second to the 4th invention, it is characterized in that, this two fluids interflow spatial portion has round-shaped in vertical view, and
Atomizing is collaborated radially forming of spatial portion with the groove of gas introduction part or the groove of liquid fuel tank bottom along two fluids in the vertical view.
The two-fluid spray burner of the 7th invention is the two-fluid spray burner of the 5th or the 6th invention, it is characterized in that atomizing is formed on the rotational symmetric position of central axis of collaborating spatial portion around two fluids with described a plurality of grooves of the bottom of described a plurality of grooves of gas introduction part or liquid fuel tank.
The two-fluid spray burner of the 8th invention is any two-fluid spray burner in second to the 7th invention, and this burner is characterised in that also and comprises:
With liquid fuel tank to the pressing element that presses down, wherein
The bottom abutment of liquid fuel tank is on the atomizing air introduction part of second fluid nozzle and realize firmly contact, perhaps
The bottom abutment of liquid fuel tank is on second fluid nozzle and realize firmly contact.
The two-fluid spray burner of the 9th invention is the two-fluid spray burner of first invention, it is characterized in that
The bottom split shed of liquid fuel tap liquid fuel within case,
This burner is characterised in that also and comprises:
Be formed on the sidepiece of liquid fuel tank and around first tubular atomizing gas passage between the urceolus of the periphery of this sidepiece; And
Be arranged on the second fluid nozzle of the lower end of urceolus, this second fluid nozzle has:
Below described liquid fuel tap, be formed on the two fluids interflow spatial portion in the middle body, and
Form one or more spray holes of leading to two fluids interflow spatial portion,
This burner is characterised in that
The end face of second fluid nozzle forms the taper surface part of taper,
The bottom surface of the bottom of liquid fuel tank forms the taper surface part of taper,
A plurality of supports are darted on the sidepiece of described liquid fuel tank, and the bottom surface of each described support forms the taper surface part,
The taper surface of described support part in abutting connection with and be coupled under the state of taper surface part of described second fluid nozzle, described liquid fuel tank is installed on the described second fluid nozzle,
The gap that is formed on by described support between the taper surface part of the taper surface part of liquid fuel tank and second fluid nozzle is the second atomizing gas passage, and
From the liquid fuel tap discharge and the liquid fuel that flows into two fluids interflow spatial portion with flow down, flow through atomizing between the described support with gas passage portion and flow through described second atomizing is imported into described two fluids interflow spatial portion with gas passage described atomizing and collaborate the space with gas at described two fluids and collaborate along described first atomizing with gas passage, then, described liquid fuel and described atomizing are together injected from described spray holes with gas.
The two-fluid spray burner of the tenth invention is any two-fluid spray burner in second to the 9th invention, it is characterized in that, two fluids interflow spatial portion is the turbination shape, and spray holes is formed on the vertex position place in turbination space.
The two-fluid spray burner of the 11 invention is any two-fluid spray burner in second to the tenth invention, this burner is characterised in that the tubular fuel gas passage between the gaseous fuel supply pipe that also comprises the periphery that is formed on urceolus and centers on this urceolus
This burner is characterised in that gaseous fuel flows down and injected and burnt from the lower end of fuel gas passage along fuel gas passage.
The two-fluid spray burner of the 12 invention is any two-fluid spray burner in the first to the 11 invention, it is characterized in that the end of liquid fuel supply pipe contacts with the inner peripheral surface of liquid fuel tank sidepiece.
The two-fluid spray burner of any also can comprise following structure in first and second inventions.
The two-fluid spray burner of first structure is any two-fluid spray burner in first and second inventions, this burner is with liquid fuel combustion chamber and this liquid fuel that burns below the second fluid nozzle of two fluid spray devices is ejected into second fluid nozzle, and this burner is characterised in that also and comprises:
Be formed on two fluid spray devices and around the tubular combustion air passage between the burner urceolus of the periphery of this two fluid sprays device;
The baffle plate that combustion air passage and combustion chamber are separated; And
Be arranged on the combustion air hole on the baffle plate periphery, it is characterized in that
The combustion air that flows down along the combustion air passage stopped by baffle plate, and is directed to the periphery of baffle plate and away from fuel nozzle, and flows through the combustion air hole and enter the combustion chamber.
The two-fluid spray burner of second structure is the two-fluid spray burner of first structure, it is characterized in that
The tube that extends downwards from the baffle plate bottom surface and be used for the delay in supply combustion air is arranged in and forms different tubular combustion air passages between this and the burner urceolus, and this different combustion air passage leads to the combustion air hole, and
Through after the combustion air hole, combustion air flows down and flows into the combustion chamber from the lower end of different combustion air passages along different combustion air passages.
The two-fluid spray burner of the 3rd structure is the two-fluid spray burner of second structure, it is characterized in that
Downward being used to of extending prevents that the one or more tubes that remain in a standstill are arranged on the tube inside that is used for the delay in supply combustion air from the bottom surface of baffle plate.
The two-fluid spray burner of the 4th structure is any two-fluid spray burner in first to the 3rd structure, it is characterized in that
In baffle plate, a plurality of other combustion air holes are formed on the position of inboard, combustion air hole.
Beneficial effect
According to the two-fluid spray burner of first invention, this two-fluid spray burner is provided with liquid fuel tank.This liquid fuel tank comprises the tubular sidepiece and is arranged on the bottom of this sidepiece lower end.Liquid fuel tank stores from the liquid fuel of liquid fuel supply pipe supply and from the liquid fuel tap and discharges stored liquid fuel.The sidepiece or the bottom split shed of liquid fuel tap liquid fuel within case, and be lower than the liquid level of stored liquid fuel.Utilize atomizing to make the liquid fuel atomization of discharging from the liquid fuel tap of liquid fuel tank with gas, and this liquid fuel that burns.Therefore, in the two-fluid spray burner of so constructing, be convenient liquid fuel when the liquid fuel supply pipe intermittently is fed into liquid fuel tank, also can discharge the liquid fuel that is stored in the liquid fuel tank from the liquid fuel tap of liquid fuel tank continuously.In other words, even if the supply flow rate of the pump of liquid fuel supply system is very low, and liquid fuel intermittently is fed into liquid fuel tank from the liquid fuel supply pipe, and the liquid level that is stored in the liquid fuel in the liquid fuel tank also just fluctuates a little up and down and causes from the liquid fuel flow that the liquid fuel tap is discharged fluctuation being arranged slightly.The flow of the liquid fuel of being supplied with fluctuates widely unlike normal burner.Therefore, when promptly convenient feed fluid flow fuel was very low, also feed fluid fuel stably helped realizing smooth combustion thus, and had eliminated the possibility that produces the unburned exhaust and cause accident to be caught fire.
Two-fluid spray burner according to second invention, the liquid fuel that flows into two fluids interflow spatial portion from the discharge of liquid fuel tap flows down with gas passage with the edge atomizing and flows through the atomizing that is imported into two fluids interflow spatial portion with the groove of gas introduction part that atomizes and collaborates the spatial portion interflow with gas at two fluids, then, this liquid fuel and atomizing are together injected from spray holes with gas.Therefore, in the two-fluid spray burner of so constructing, liquid fuel mixes at two fluids interflow spatial portion fully with flow velocity increases (horizontal velocity component increase) at the groove place atomizing air, and is then, injected from the spray holes of second fluid nozzle.Therefore, than the situation that two fluids interflow spatial portion and groove are not set, the angle of flare of the liquid fuel that is sprayed is bigger, and liquid fuel is atomized reliably, improves combustion characteristics whereby.
According to the two-fluid spray burner of the 3rd invention, the taper surface of liquid fuel within case part adjacency also is coupled under the state of atomizing with the taper surface part of gas introduction part, and liquid fuel tank is installed in atomizing and uses on the gas introduction part.Therefore, be easy to the to align central axis of liquid fuel tank and second fluid nozzle.Thus, liquid fuel tank is installed on central authorities, and can be so that atomize evenly mobile what make progress in week with gas with the atomizing in the gas passage in upwards even and feasible atomizing of week with the width of gas passage.This makes the symmetry (the perhaps symmetry of flame) can guarantee the liquid fuel that ejects from the spray holes of second fluid nozzle.
Two-fluid spray burner according to the 4th invention, from the liquid fuel tap discharge and flow into the liquid fuel of two fluids interflow spatial portion with flow down with gas passage along atomizing and flow through the groove of fuel tank bottom and the atomizing that is imported into two fluids interflow spatial portion with gas at spatial portion interflow, two fluids interflow, then, this liquid fuel and atomizing are together injected from spray holes with gas.Therefore, so construct two-fluid spray burner, liquid fuel mixes at two fluids interflow spatial portion with gas fully with the atomizing that flow velocity is located to increase at groove (horizontal velocity component increase), and is then, injected via spray holes.Thus, than the situation that two fluids interflow spatial portion and groove are not set, the angle of flare of the liquid fuel that is sprayed is bigger, and liquid fuel is atomized reliably, improves combustion characteristics whereby.
In addition, the taper surface of liquid fuel within case part adjacency also is coupled under the taper surface state partly of second fluid nozzle, and liquid fuel tank is installed on the second fluid nozzle.Therefore, be easy to the to align central axis of liquid fuel tank and second fluid nozzle.Thus, liquid fuel tank is installed on central authorities, and can be so that atomize evenly mobile what make progress in week with gas with the atomizing in the gas passage in upwards even and feasible atomizing of week with the width of gas passage.This makes the symmetry (the perhaps symmetry of flame) can guarantee the liquid fuel that ejects from the spray holes of second fluid nozzle.
According to the two-fluid spray burner of the 5th invention, atomizing collaborate along two fluids in the vertical view with the groove of the groove of gas introduction part or liquid fuel tank bottom spatial portion periphery tangential direction and form.Therefore, atomizing forms eddy current with gas and mixes at two fluids interflow spatial portion with liquid fuel, thus mixed fluid fuel and atomizing gas more fully.Whereby, the liquid fuel that sprays via the spray holes of second fluid nozzle is atomized reliably, improve the fluid combustion characteristic thus.
According to the two-fluid spray burner of the 6th invention, atomizing is collaborated radially forming of spatial portion with the groove of gas introduction part or the groove of liquid fuel tank bottom along two fluids in the vertical view.Therefore, atomizing is collided and is mixed with this liquid fuel at two fluids interflow spatial portion with gas and liquid fuel, thus mixed fluid fuel and atomizing gas more fully.Whereby, the liquid fuel that ejects from the spray holes of second fluid nozzle is atomized more reliably, further improve the fluid combustion characteristic thus.
According to the two-fluid spray burner of the 7th invention, atomizing is formed on around the rotational symmetric position of spatial portion central axis, two fluids interflow with described a plurality of grooves of gas introduction part or described a plurality of grooves of liquid fuel tank bottom.Therefore, can make the liquid fuel that ejects from the spray holes of second fluid nozzle, improve the fluid combustion characteristic whereby being evenly distributed of making progress in week.
According to the two-fluid spray burner of the 8th invention, two-fluid spray burner is provided with liquid fuel tank to the pressing element that presses down.Thus, the bottom abutment of liquid fuel tank the atomizing of second fluid nozzle with the gas introduction part on and realize firmly contact, perhaps the bottom abutment of liquid fuel tank is on second fluid nozzle and realize firmly contact.Therefore, the bottom surface of fuel tank bottom has been realized firm the contact with atomizing with the end face of gas introduction part.In other words, the taper surface of liquid fuel tank part and the atomizing taper surface part of gas introduction part, perhaps the taper surface of liquid fuel tank part has partly realized firm the contact with the taper surface of second fluid nozzle, prevents from thus to form the gap between these contact-making surfaces.Therefore, the wide jeting effect that flows through the part except groove and give full play to groove with gas that prevents to atomize is possible.
Two-fluid spray burner according to the 9th invention, from the liquid fuel tap discharge and the liquid fuel that flows into two fluids interflow spatial portion with along first atomizing with gas passage flow down, flow through atomizing between the support with gas passage portion, then flow through second atomizing is imported into two fluids interflow spatial portion with gas passage atomizing and use gas to collaborate spatial portion to collaborate at two fluids, then, this liquid fuel and atomizing are together injected from spray holes with gas.Therefore, in the two-fluid spray burner of so constructing, liquid fuel mixes with gas with atomizing at two fluids interflow spatial portion, and from a plurality of spray holes of second fluid nozzle is ejected subsequently.Thus, than the situation that two fluids interflow spatial portion is not set, the angle of flare of the liquid fuel that is sprayed is bigger, and liquid fuel is atomized reliably, improves combustion characteristics whereby.
According to the two-fluid spray burner of the tenth invention, two fluids interflow spatial portion is the turbination shape, and spray holes is formed at the vertex position place of turbination shape.Therefore, liquid fuel can mix with gas with atomizing more fully at two fluids interflow spatial portion.The liquid fuel that ejects from spray holes is atomized more reliably, further improves the fluid combustion characteristic whereby.
According to the two-fluid spray burner of the 11 invention, this two-fluid spray burner comprises and is formed on urceolus and around the tubular fuel gas passage between the gaseous fuel supply pipe of the periphery of this urceolus.Gaseous fuel flows down along fuel gas passage, and is injected and burnt from the lower end of fuel gas passage then.Therefore, in the two-fluid spray burner of so constructing, the gaseous fuel that ejects from the tubular fuel gas passage upwards is uniform in week.Thus, it is possible improving combustion characteristics, gives full play to the flame stabilization effect whereby for example with low discharge feed fluid fuel the time.
Two-fluid spray burner according to the 12 invention, the end of liquid fuel supply pipe contacts with the inner peripheral surface of liquid fuel tank sidepiece, when thereby promptly the flow of the box lunch liquid fuel of discharging from the liquid fuel supply pipe was very low, liquid fuel also can flow down along inner peripheral surface.Therefore, further stable is possible from liquid fuel tap draining liquid fuel.In other words, when liquid fuel dripped with the drop form, the liquid level that is stored in the liquid fuel in the liquid fuel tank fluctuated widely.Under the low-down situation of liquid level, the situation of termination draining liquid fuel temporary transient exposure of liquid fuel tap may appear and.Yet, allow liquid fuel to flow down and can prevent this defective along the inner peripheral surface of liquid fuel tank.
According to the two-fluid spray burner of first structure, the combustion air that flows down along the combustion air passage stopped by baffle plate, then be imported into baffle plate periphery and away from fuel nozzle.Then, combustion air passes through the combustion air hole and flows into the combustion chamber.Therefore, only some combustion air in the combustion chamber with the fuel mix that ejects from fuel nozzle and be used for combustion fuel.Remaining combustion air is further to dirty and mix with the burning and gas-exhausting that produces by burning.Thus, realize that with the supply (step) of air the appropriateness of combustion air and fuel mixes and produce a large amount of burning and gas-exhaustings and non-sub-cooled flame is possible via primary combustion.Realization can utilize simple structure to produce a large amount of burning and gas-exhaustings and can not produce unburned gas is possible with the burner such as two-fluid spray burner that causes accident to be caught fire.
In addition, make combustion air flow into the combustion chamber by baffle plate in position away from fuel nozzle.Therefore, the position that can a part of combustion air be supplied to fuel is set to down away from baffle plate.The position of flame also is set to down to prevent whereby that away from baffle plate cigarette ash is attached to the bottom surface of baffle plate.The bottom surface that a large amount of coal smokes are attached to baffle plate can cause many defectives, is for example caused the fuel nozzle obstruction and is caused the fuel atomizer abnormal heating because of coal smoke absorbs from flame radiation heat by coal smoke.Yet, be attached to the bottom surface of baffle plate as mentioned above by preventing coal smoke, can avoid occurring these defectives.
In addition,, be provided with from the bottom surface of baffle plate and extend the tube that is used for the delay in supply combustion air downwards, and the additional tubular combustion air passage that leads to the combustion air hole is formed between this tube and the burner urceolus according to the two-fluid spray burner of second pattern.Therefore, make the combustion air that flows through the combustion air hole flow down along different combustion air passages, the lower end from the combustion air passage flows into the combustion chamber then.Therefore, utilize this structure, it is possible postponing a part of combustion air is supplied to the fuel that ejects from fuel nozzle.In other words, the position that can a part of combustion air be supplied to fuel is set to down away from baffle plate.Therefore, the position of flame also is set to down to prevent whereby that away from baffle plate cigarette ash is attached to the bottom surface of baffle plate.Can also be set to down operability effect by position that aforesaid baffle plate realizes that a part of combustion air is supplied to fuel only is set away from baffle plate.Yet as described in second invention, by being provided for the tube of delay in supply combustion air, the position that can more a part of combustion air be supplied to fuel is set to down away from baffle plate.
In aforesaid first structure, when since size restrictions of burner or the like baffle plate can not be fabricated to enough greatly, and the distance between fuel nozzle and the combustion air hole can not make during long enough, this partial combustion that supplies to fuel is with the amount of air too much and can sub-cooled flame.On the contrary, by the tube that similarly is used for the delay in supply combustion air with second structure is set, the position that can this partial combustion be supplied to liquid fuel with air is set to down away from baffle plate, and this partial combustion that can will supply to fuel is reduced to suitable amount with air.Therefore, from this angle, with second invention similarly the setting of tube be effective.By the size that this can reduce baffle plate is set, and can compact burner.
According to the 3rd two-fluid spray burner of constructing, downward being used to of extending prevents that the one or more tubes that remain in a standstill are arranged on the tube inside that is used for the delay in supply combustion air from the bottom surface of baffle plate.Therefore, can prevent that the viscous flow (convection current) of fuel from appearing near the bottom surface of baffle plate by the tube that is used to prevent remain in a standstill.Whereby, near the fuel in anti-baffle plate bottom surface remains in a standstill on fire and prevents that it is possible that coal smoke is adhered to the baffle plate bottom surface.
According to the two-fluid spray burner of the 4th structure, one or more additional combustion are formed in the inboard baffle part in described one or more combustion airs hole, so that a part of combustion air flows through these additional combustion airports with airport.Therefore, this energy of flow of combustion air is suppressed near the viscous flow that occurs combustion air the baffle plate bottom surface, prevents that thus coal smoke is attached on the baffle plate.In addition, the combustion air of low temperature flows near the fuel nozzle with airport via additional combustion.Whereby, it is possible utilizing combustion air to obtain cooling effect on fuel nozzle, and this fuel nozzle is easy to by from flame radiation heat and by superheated.
Description of drawings
Fig. 1 shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 1.
Fig. 2 is the transverse sectional view along the line A-A intercepting of Fig. 1.
Fig. 3 is the transverse sectional view along the line B-B intercepting of Fig. 1.
Fig. 4 (a) shows the amplification longitudinal cross-section view of two fluid spray devices of the two-fluid spray burner that is provided for Fig. 1, and Fig. 4 (b) is the transverse sectional view along the line C-C intercepting of Fig. 4 (a).
Fig. 5 (a) shows the amplification longitudinal cross-section view of the bottom of two fluid spray devices, and Fig. 5 (b) shows the vertical view (view on the arrow D of Fig. 5 (a) direction) of the second fluid nozzle that is provided for two fluid spray devices.
Fig. 6 (a) shows the longitudinal cross-section view according to the structure of the bottom of two fluid spray devices of the two-fluid spray burner of the embodiment of the invention 2, and Fig. 6 (b) shows the vertical view (view on the arrow E direction of Fig. 6 (a)) of the second fluid nozzle that is provided for two fluid spray devices.
Fig. 7 (a) shows the longitudinal cross-section view according to the structure of the bottom of two fluid spray devices of the two-fluid spray burner of the embodiment of the invention 3, and Fig. 7 (b) shows the vertical view (view on the arrow F of Fig. 7 (a) direction) of the second fluid nozzle that is provided for two fluid spray devices.
Fig. 8 (a) shows according to the longitudinal cross-section view of the structure of the bottom of two fluid spray devices of the two-fluid spray burner of the embodiment of the invention 4 (along the longitudinal cross-section view of the line G-G of Fig. 8 (b) intercepting); Fig. 8 (b) shows the upward view (view on the arrow H of Fig. 8 (a) direction) of the liquid fuel tank that is provided for two fluid spray devices; Fig. 8 (c) is the view on the arrow I of Fig. 8 (b) direction; And Fig. 8 (d) is the transverse sectional view along the line J-J intercepting of Fig. 8 (a).
Fig. 9 (a) shows according to the longitudinal cross-section view of the structure of the bottom of two fluid spray devices of the two-fluid spray burner of the embodiment of the invention 5 (along the cross sectional view of the line K-K of Fig. 9 (b) intercepting); Fig. 9 (b) shows the upward view (view on the arrow L of Fig. 9 (a) direction) of the liquid fuel tank that is provided for two fluid spray devices; And Fig. 9 (c) is the transverse sectional view along the line M-M intercepting of Fig. 9 (a).
Figure 10 (a) shows the longitudinal cross-section view according to the structure of the bottom of two fluid spray devices of the two-fluid spray burner of the embodiment of the invention 6.Figure 10 (b) is the transverse sectional view along the line L-L intercepting of Figure 10 (b).
Figure 11 shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 7.
Figure 12 is the transverse sectional view along the line M-M intercepting of Figure 11.
Figure 13 is the system schematic that schematically shows according to the fuel cell generation of the embodiment of the invention 8.
Figure 14 (a) shows the liquid fuel supply tube end view of draining liquid fuel intermittently from conventional two-fluid spray burner, and Figure 14 (b) shows the view that fluctuates widely of the liquid fuel flow of being supplied with in the conventional two-fluid spray burner.
Label declaration
11, two-fluid spray burner; 12, two fluid spray devices; 13, combustion chamber; 14, fuel gas passage; 15, combustion air passage; 16, first; 17, second; 18, plate; 19, liquid fuel tank; 20, sidepiece, 20a, inner peripheral surface; 20b, outer peripheral face; 21, bottom; 21a, inner surface (end face); 21b, outer surface (bottom surface); 21b-1, outside; 21b-2, inside; 22, liquid fuel tap; 23, liquid level; 24, liquid fuel; 24A, profile portion; 25, liquid fuel supply pipe; 25a, end (bottom); 26, packing ring; 27, sprayer urceolus; 27A, bottom; 27B, upper end; 28, atomizing air passage; 29, air admission hole; 30, atomizing air supply pipe; 30A, end; 31, lid; 32,33, the threaded portion; 31A, bottom; 31B, step-portion; 34, O shape ring; 35, packing ring; 36, helical spring; 37, atomizing gas introduction part; 37a, end face; 37b, inner peripheral surface; 38, second fluid nozzle; 38a, inner surface (end face); 39, nozzle body; 40, groove; 41, space; 42, space (recess); 43, two fluids interflow spatial portion; 44, spray holes; 45, gap; 46, atomizing air; 47, gaseous fuel supply pipe; 48, burner urceolus; 48a, inner peripheral surface; 49, gaseous fuel; 50, combustion air; 51, projection; 52, combustion air access opening; 53, combustion air passage; 54, spark plug; 61, groove; 81, groove; 91, support; 91a, bottom surface; 91a-1, outside; 92, atomizing air passage; 93, atomizing air channel part; 101, combustion air access opening; 111, modifier; 112, combustion furnace; 113 fuel cells
The specific embodiment
Hereinafter, embodiment of the invention will be described with reference to drawings.
＜embodiment 1 〉
Fig. 1 shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 1.Fig. 2 is the transverse sectional view along the line A-A intercepting of Fig. 1.Fig. 3 is the transverse sectional view along the line B-B intercepting of Fig. 1.Fig. 4 (a) shows the amplification longitudinal cross-section view of two fluid spray devices in the two-fluid spray burner that is arranged on Fig. 1, and Fig. 4 (b) is the transverse sectional view along the line C-C intercepting of Fig. 4 (a).Fig. 5 (a) shows the amplification longitudinal cross-section view of the bottom of two fluid spray devices, and Fig. 5 (b) shows the vertical view (view on the arrow D of Fig. 5 (a) direction) of the second fluid nozzle that is provided for two fluid spray devices.
The two-fluid spray burner 11 of embodiment 1 is schematically described to Fig. 3 based on Fig. 1.Two-fluid spray burner 11 comprises burner urceolus 48.In burner urceolus 48, two fluid spray devices 12 are placed in the middle body, and combustion chamber 13 is positioned at below the two fluid spray devices 12.Gaseous fuel feed path 14 is formed on around the two fluid spray devices 12, and combustion air feed path 15 is formed on around the gaseous fuel feed path 14.Combustion air feed path 15 and combustion chamber 13 are separated by the plate 18 as baffle plate.On the bottom surface of plate 18, be provided with as first 16 of the tube that is used for the delay in supply combustion air with as second 17 of the tube that is used to prevent remain in a standstill.
Describe the structure of two fluid spray devices 12 in detail based on Fig. 4 and Fig. 5.Notice that two fluid spray devices 12 spray two fluid streams, promptly liquid fuel is used gas (atomizing air) with atomizing, and in other words, this two fluid sprays device utilization atomizing makes liquid fuel atomization and sprays this liquid fuel with gas.
As shown in Figure 4 and Figure 5, two fluid spray devices 12 have built-in liquid fuel tank 19.Liquid fuel tank 19 has the structure that comprises tubular sidepiece (body) 20 and be arranged at the bottom 21 at place, sidepiece 20 bottoms.In the liquid fuel within case 19, store the liquid fuel 24 that is used for burner combustion, and the bottom 21 centre openings of small liquid fuel tap 22 liquid fuel within casees 19.Liquid fuel tap 22 is arranged in the position of liquid level 23 belows of the liquid fuel 24 that is stored in liquid fuel tank 19.
Specifically, the liquid fuel of supplying with from liquid fuel supply pipe 25 24 once had been stored in the liquid fuel tank 19.Stored liquid fuel 24 is from liquid fuel tank 19, be discharged from via the liquid fuel tap 22 of bottom.At this moment, be stored in the height (21 inner surface 21a is to the height of liquid level 23 from the bottom) of the liquid level 23 of the liquid fuel 24 in the liquid fuel tank 19 for the height corresponding to the fluid column head (will describe in detail after a while) of the pressure loss of the liquid fuel 24 that flows through liquid fuel tap 22 is provided.The example that is used for the liquid fuel 24 of burner combustion can be kerosene, heavy oil, alcohol, ether or the like.
In the liquid fuel within supply pipe 25, from the upper end of liquid fuel tank 19 end (bottom) 25A is inserted liquid fuel tank 19 downwards and with its top of being arranged to be positioned at the middle body of liquid fuel tank 19 and being positioned at liquid level 23.The cardinal extremity of liquid fuel supply pipe 25 is connected to the liquid fuel supply pump of unshowned liquid fuel supply system.
Shown in the chain-dotted line of Fig. 5 (a), the end 25A of liquid fuel supply pipe 25 can contact with the inner peripheral surface 20a of the sidepiece 20 of liquid fuel tank 19.If the inner peripheral surface 20a of the end 25A of liquid fuel supply pipe 25 and liquid fuel tank 19 is spaced apart, then with low discharge feed fluid fuel 24 time, liquid fuel 24 is as shown in the figure with droplets fall.On the other hand, if the end 25A of liquid fuel supply pipe 25 contacts with the inner peripheral surface 20a of liquid fuel tank 19, then liquid fuel 24 flows down along inner peripheral surface 20a.
Liquid fuel tank 19 is to be set in the tubular sprayer urceolus 27 with the concentric mode of sprayer urceolus 27.In the liquid fuel within case 19, the tubular space between sidepiece 20 and the sprayer urceolus 27 is the atomizing air passage 28 as the atomizing air passage.In sprayer urceolus 27, have air admission hole 29.Air admission hole 29 is connected to the end 30A of atomizing air supply pipe 30.The basic side of atomizing air supply pipe 30 is connected to the pressure fan of unshowned atomizing air feed system.
Second fluid nozzle 38 be attached to the bottom 27A of sprayer urceolus 27 and be positioned at liquid fuel tank 19 below.In other words, two fluid spray devices 12 are configured to comprise liquid fuel tank 19, and this liquid fuel tank is used as the buffer unit that is inserted between liquid fuel supply pipe 25 and the second fluid nozzle 38, is used to make the fluctuation of the fuel liquid flow of supply to reduce.The atomizing air introduction part 37 that second fluid nozzle 38 comprises plate-like nozzle body 39 and is formed on the conduct atomizing usefulness gas introduction part on the nozzle body 39.Utilization abuts against the end face periphery of the nozzle body 39 on the lower surface of sprayer urceolus 27 and is coupled to atomizing air introduction part 37 among the bottom 27A of sprayer urceolus 27, second fluid nozzle 38 is fixed to the bottom 27A of sprayer urceolus 27 by the fixing means such as welding.
Atomizing air introduction part 37 forms annular shape, and is included in the space 41 that middle body has circular flat figure (vertical view).Nozzle body 39 comprises the turbination space (recess) 42 in the middle body, and in the center the small spray holes 44 of (vertex position place) opening in turbination space 42.The space 41 of atomizing air introduction part 37 is extended to the space 42 of nozzle body 39, and two fluids interflow spatial portion 43 is formed in space 41 and 42.Specifically, two fluids interflow spatial portion 43 has pyramidal structure, and this pyramidal structure has circular vertical view and towards the diameter of spray holes 44 convergents.In atomizing air introduction part 37, groove (slit) 40 is formed at two positions that make progress in its week.These grooves 40 are the eddy current type groove, and extend on the tangential direction of the circumference of the interflow of two fluids in vertical view spatial portion 43.In addition, groove 40 is formed at around the rotational symmetric position of central axis (central axis of the spray holes 44 in the example of accompanying drawing) of two fluids interflow spatial portion 43.
On the other hand, utilize as the upper end 27B sealing of the lid 31 of closure member with sprayer urceolus 27, with prevent atomizing air from sprayer urceolus 27 internal leakages to the outside.By being formed on the threaded portion 32 on the inner peripheral surface that threaded portion 33 on the outer peripheral face that covers 31 bottom 31A is screwed to the upper end 27B that is formed at sprayer urceolus 27 and will cover the 31 upper end 27B that are attached to sprayer urceolus 27.O shape ring 34 is inserted between the upper end 27B that cover 31 step-portion 31B and sprayer urceolus 27, to prevent the atomizing air leakage reliably.The end 25A of liquid fuel supply pipe 25 passes and covers 31, and through sprayer urceolus 27 inside (inside of helical spring 36), the upper end via liquid fuel tank 19 is inserted into liquid fuel tank 19 then.
Be inserted between the packing ring 26 that is arranged on the upper end of covering the packing ring 35 on 31 the bottom surface and being arranged on liquid fuel tank 19 as the helical spring 36 of pressing element.Helical spring 36 makes outer surface (bottom surface) 21b of bottom 21 of liquid fuel tank 19 be pressed against on the end face 37a of atomizing air introduction part 37 liquid fuel tank 19 to pressing down.Thus, the end face 37a (atomizing air introduction part 37) of outer surface (bottom surface) 21b of the bottom 21 that contacts with each other and second fluid nozzle 38 is firm engagement each other, prevents from whereby to form the gap between contact-making surface 21b and 37a.
Gap 45 is arranged between packing ring 26 and the liquid fuel supply pipe 25, and the inner space of the sprayer urceolus 27 of the inner space of liquid fuel tank 19 and liquid fuel tank 19 outsides communicates with each other by this gap.In other words, the inner space of sprayer urceolus 27 is led in the upper end of liquid fuel tank 19, and the upper end (upstream portion) of the inner space of liquid fuel tank 19 and atomizing air passage 28 communicates with each other.Therefore, from air admission hole 29 flows into sprayer urceolus 27, the pressure that then flows into the atomizing air 46 of atomizing air passage 28 acts on the liquid fuel 24 that is stored in the liquid fuel tank 19 liquid level 23.
In two fluid spray devices 12, present from the liquid fuel supply pump, via liquid fuel supply pipe 25 and when being used for the liquid fuel 24 of burner combustion (discharging continuously and intermittently discharge under the situation of the relatively low flow as Fig. 5 (a) shown under the higher flows situation relatively), liquid fuel 24 once had been stored in the liquid fuel tank 19 when discharging from the end 25A of liquid fuel supply pipe 25.The liquid fuel 24 that is stored in the liquid fuel tank 19 is discharged continuously from the liquid fuel tap 22 of the bottom 21 of liquid fuel 19, and enters second-rate body interflow spatial portion 43.Under the situation that liquid fuel within is intermittently discharged from the end 25A of liquid fuel supply pipe 25, a kind of phenomenon repeatedly can appear, wherein, liquid level 23 rises from the end 25A draining liquid fuel 24 of liquid fuel supply pipe 25 time, and liquid level descends during not from the end 25A draining liquid fuel 24 of liquid fuel supply pipe 25.Although the flow of the liquid fuel 24 of discharging from liquid fuel tap 22 can change according to this type of fluctuation the liquid level, this changes in flow rate is more much smaller than conventional changes in flow rate.
On the other hand, the atomizing air of presenting from air feed pump, via atomizing air supply pipe 30 46 flows into sprayer urceolus 27 by air admission hole 29 and flows down along the atomizing air passage 28 between liquid fuel tank 19 and the sprayer urceolus 27.Subsequently, atomizing air 46 flow through second fluid nozzle 38 atomizing air introduction part 37 groove 40 and increase flow velocity, be imported into two fluids interflow spatial portion 43 then.Atomizing air 46 becomes eddy current in the spatial portion 43 of two fluids interflow, and collaborates (mixing) with the liquid fuel 24 of discharging from the liquid fuel tap 22 of liquid fuel tank 19.Therefore, liquid fuel 24 fully mixes with atomizing air 46, and utilizes atomizing air 46 to be atomized and together spray into the combustion chamber 13 (flame) that is used to burn from the spray holes 44 of second fluid nozzle 38 with atomizing air 46.Initial ignition to atomized liquid fuel 24 is undertaken by spark plug 54.
Describe the fluid column head H that is stored in the liquid fuel 24 in the liquid fuel tank 19 herein in detail.The equation of the pressure loss Δ Pair of the kinetic energy E of the liquid fuel 24 that can discharge by following pressure loss Δ P (hole) based on the liquid fuel 24 that flows through liquid fuel tap 22, from liquid fuel tap 22 and the atomizing air 49 of groove 40 calculates fluid column head H.
Fluid column head H=pressure loss Δ P (hole)+kinetic energy E-pressure loss Δ Pair
Can by following based on liquid fuel 24 flow velocity v and the equation of the density p of liquid fuel 24 calculate kinetic energy E.
Kinetic energy=ρ v 2/ 2
In addition, the height that is stored in the liquid level 23 of the liquid fuel 24 in the liquid fuel tank 19 changes along with the flow of the liquid fuel 24 that supplies to liquid fuel tank 19 via liquid fuel supply pipe 25.In other words, when increasing the flow of the liquid fuel of being supplied with 24 when the output of controlling transfer pump for fuel, liquid level 23 rises, and when the flow of liquid fuel 24 reduced, this liquid level descended.Therefore, according to the predetermined adjustment scope of the flow of feed fluid fuel 24, liquid fuel tank 19 is configured to have the height corresponding to the height change of liquid level 23.
In addition, shown in Fig. 5 (a), liquid fuel 24 is ejected from spray holes 44 with conical in shape.Spray regime (jet angle) is determined by the cross-sectional area (flowing through the flow velocity of the atomizing air 46 of groove 40) of groove 40, size (or aperture) of spray holes 44 or the like.
Next will describe the structure except two fluid spray devices 12 in detail.As shown in Figure 1 to Figure 3, tubular gaseous fuel supply pipe 47 is configured to the periphery around sprayer urceolus 27.Gaseous fuel supply pipe 47 and the 27 concentric settings of sprayer urceolus, and the tubular space between gaseous fuel supply pipe 47 and the sprayer urceolus 27 is a fuel gas passage 14.The gaseous fuel of supplying with from gaskraftstoffzufuhranlage that is used for burner combustion 49 flows down and is sprayed into the combustion chamber 13 that is used to burn from the lower end of fuel gas passage 14 along fuel gas passage 14.Liquid fuel 24 and gaseous fuel 49 can burn individually or simultaneously.Be used for burner combustion gaseous fuel 49 be exemplified as methane, ethane, propane, butane, ether and hydrogen.In addition, under with two-fluid spray burner 11 situation as the thermal source of modifier, gaseous fuel 49 can be the residue modification gas (referring to Figure 13) that is not used in fuel cell generating and is back to two-fluid spray burner 11.
Burner urceolus 48 is tubular and the periphery that centers on gaseous fuel supply pipe 47.Burner urceolus 48 and gaseous fuel supply pipe 47 are provided with one heart, and the tubular space between burner urceolus 48 and the gaseous fuel supply pipe 47 is the first combustion air passage 15.Therefore, the combustion air of supplying with from the pressure fan of combustion air feed system 50 flows down along combustion air passage 15.
Plate 18 is arranged between the bottom of the bottom (being the bottom of gaseous fuel supply pipe 47) of combustion air passage 15 and burner urceolus 48.Plate 18 is annular plate and combustion air passage 15 and combustion chamber 13 is separated.In the example of accompanying drawing, plate 18 is set to that the height with second fluid nozzle 38 is identical basically, but is not limited to this, and it can be arranged on the position that is higher than second fluid nozzle 38.Yet,, need first 16 and second 17 make than shown in the accompanying drawing longer if plate 18 is arranged on higher position place.Therefore, it is minimum and quite reasonable plate 18 to be set under the situation identical with the height of second fluid nozzle 38 in the accompanying drawing example cost.
The inner peripheral surface of plate 18 is fixed to the outer peripheral face of gaseous fuel supply pipe 47 by the fixing means such as welding.A plurality of projections 51 (being four projections in the example of Fig. 2) are formed in the outer peripheral face of plate 18.The end face of projection 51 is fixed to the inner peripheral surface of burner urceolus 48 by the fixing means such as welding.Therefore, near the part between gaseous fuel supply pipe 47 and the burner urceolus 48 is by plate 18 sealings.Yet, on the periphery of plate 18, between the inner peripheral surface 48a of the outer peripheral face of plate 18 and burner urceolus 48, be formed with the gap by projection 51.These gaps are combustion air holes 52.In other words, combustion air passage 15 and combustion chamber 13 communicate with each other via these combustion air holes 52.
Therefore, after combustion air passage 15 flows down, combustion air 50 stops by plate 18 and is imported into the outer circumferential side away from second fluid nozzle 38 (spray holes 44) of plate 18, and flows through combustion air hole 52 and enter combustion chamber 13.
In addition, all downward first 16 and second 17 of extending are fixed on the bottom surface of plate 18 by the fixing means such as welding, and second 17 is arranged on first 16 inside.Be positioned at for first 16 52 inboards, combustion air hole the position and with the 48 concentric settings of burner urceolus.Tubular space between burner urceolus 48 and first 16 is the second combustion air passage 53.
Therefore, after flowing down along the first combustion air passage 15 and passing through combustion air hole 52, combustion air 50 further flows down along the second combustion air passage 53.Combustion air 50 is discharged from the lower end of combustion air passage 53 and is spread all over whole combustion chamber 13.Thus, a part of combustion air 50 of discharging from combustion air passage 53 (for example all about 30% of combustion airs 50) is fed into the liquid fuel 24 (mixing with liquid fuel 24) that ejects from two fluid spray devices 12 (second fluid nozzle 38) and is used for combustion of liquid fuel 24 away from the position of plate 18 down.Set the amount of the combustion air 50 that mixes with liquid fuel 24, so that the mean value of air ratio for example is not more than 1.5.The afterburning of discharging from combustion air passage 53 further flows down with air 50 and mixes with burning and gas-exhausting by the generation of burning, produces a large amount of burning and gas-exhaustings thus.
First 16 installation is used for postponing a part of combustion air 50 is supplied to atomized liquid fuel 24, that is to say that the position down away from plate 18 supplies to atomized liquid fuel 24 with combustion air 50.Therefore, make plate 18 away from flame and prevent that it from being adhered to by coal smoke.Can based on and the relation (spray holes 44 of the second fluid nozzle 38 and distance between the combustion air hole 52) of the size of plate 18 suitably set first 16 length, just first 16 end position (bottom).
In other words, the combustion air hole 52 in the periphery of plate 18 and plate 18 is only arranged even without first 16, also can will supply to atomized liquid fuel 24 through a part of combustion air 50 in combustion air hole 51 in the position away from plate 18 down.Distance between spray holes 44 and the combustion air hole 52 is far away more, and slave plate 18 is just far away more to the distance of the position that a part of combustion air 50 is supplied to atomized liquid fuel 24.Increase the distance between spray holes 44 and the combustion air hole 52 if increase the size of plate 18, then the diameter of two-fluid spray burner 11 increases.
On the other hand, when the distance between spray holes 44 and the combustion air hole 52 is limited by the size restrictions of two-fluid spray burner 11, plate 18 and combustion air hole 51 only are set in some cases can not sufficiently postpone a part of combustion air 50 is supplied to atomized liquid fuel 24.In this case, be provided with as shown in drawings first 16 very effective.In this case, reduce along with the distance between spray holes 44 and the combustion air hole 52 for first 16 and extend downwards.Yet for preventing the interference between first 16 and the liquid fuel 24 that sprayed, first 16 end (lower end) need be arranged on the position in the 24A of the profile portion outside (top) of the liquid fuel 24 that is sprayed.In other words, first 16 end (lower end) can not extend beyond the 24A of profile portion of the liquid fuel 24 that is sprayed.
If the distance between spray holes 44 and the combustion air hole 52 reduces, then first 16 installation site becomes more near spray holes 44, and the distance between the 24A of profile portion of plate 18 and atomized liquid fuel 24 reduces.Therefore, can not make longly with first 16.In view of this type of restriction, can suitably determine the distance between spray holes 44 and the combustion air hole 52 and the length of first 16 (comprising first 16 necessary member).
Be positioned at for second 17 first 16 inner and with first 16 concentric setting.The viscous flow (convection current) that is provided for preventing atomized liquid fuel 24 for second 17 appears near the plate 18.Therefore, make plate 18 away from flame and prevent that it from being adhered to by coal smoke.Therefore, second 17 is extended as far as possible downwards.Yet, for preventing the interference between second 17 and the atomized liquid fuel 24, the 24A of the profile portion outside (top) that second 17 end (lower end) need be arranged at atomized liquid fuel 24.In other words, second 17 end (lower end) also can only extend to the 24A of profile portion of atomized liquid fuel 24 to the full extent.
For example, as shown in Figure 1, the length L 2 between the end (bottom) of second fluid nozzle 38 (spray holes 44) and second 17 the end (bottom) needs to satisfy 0＜L2＜Lltan θ.Herein, L1 is the distance between the spray holes 44 of second fluid nozzle 38 and second 17, and θ is the 24A of profile portion of the liquid fuel 24 that sprayed and the angle between its horizontal line.Second 17 total length is the length sum between the end (lower end) of the bottom surface of L2 and plate 18 and second fluid nozzle 38 (spray holes 44).This condition also may be used on length between the end (lower end) of second fluid nozzle 38 (spray holes 44) and second 17 the end (lower end) and first 16 total length.Distance between the spray holes 44 of second fluid nozzle 38 and second 16 can be configured to for example to be not less than 50 times or 60 times of diameter of spray holes 44 (for example about 1 millimeter).
As mentioned above, the two-fluid spray burner 11 of present embodiment 1 is provided with liquid fuel tank 19.The bottom 21 that this liquid fuel tank comprises tubular sidepiece 20 and is arranged at the lower end of sidepiece 20, and this liquid fuel tank stores the liquid fuel of supplying with from liquid fuel supply pipe 25 24.Liquid fuel tank 19 is configured to allow stored liquid fuel 24 to discharge from liquid fuel tap 22, and this liquid fuel tap is arranged in bottom 21 and perforate is the liquid level that is lower than stored liquid fuel 24.The liquid fuel that utilizes atomizing air 46 atomizings to discharge, and this liquid fuel that burns from the liquid fuel tap 22 of liquid fuel tank 19.Therefore, even if liquid fuel 24 intermittently is fed into liquid fuel tank 19 from liquid fuel supply pipe 24, also can discharge the liquid fuel that is stored in the liquid fuel tank 19 from the liquid fuel tap 22 of liquid fuel tank 19 continuously.In other words, even if the supply flow rate of the pump of liquid fuel supply system reduces, and liquid fuel 24 intermittently is fed into liquid fuel tank 19 from liquid fuel supply pipe 25, the liquid level 23 that is stored in the liquid fuel 24 in the liquid fuel tank 19 also just a little up and down the flow of fluctuation and only the causing liquid fuel 24 of discharging from liquid fuel tap 22 fluctuate slightly.The flow of the liquid fuel of supplying with also fluctuates widely unlike normal burner.Therefore, even if the flow of the liquid fuel of supplying with is very low, also feed fluid fuel 24 stably helps realizing smooth combustion whereby, and has eliminated the possibility that produces unburned exhaust and cause accident to be caught fire.
Two-fluid spray burner 11 according to embodiment 1, two-fluid spray burner 11 is configured such that the liquid fuel 22 of discharging and flow into two fluids interflow spatial portion 43 from liquid fuel tap 22 and flows down along atomizing air passage 28 and flow through the groove 40 of atomizing air introduction part 37 and be imported into the atomizing air interflow of two fluids interflow spatial portion 43, then, this liquid fuel and atomizing air are together injected from spray holes 44.Therefore, liquid fuel 24 fully mixes at two fluids interflow spatial portion 43 with flow velocity increases (horizontal velocity component increase) at groove 40 places atomizing air 46, and is then, injected from the spray holes 44 of second fluid nozzle 38.Therefore, than the situation that two fluids interflow spatial portion 43 and groove 40 are not set, the angle of flare of liquid fuel 24 is bigger, and can make liquid fuel 24 atomizings more reliably, improves burning quality whereby.
According to the two-fluid spray burner 11 of embodiment 1, the tangential direction of the circumference of the two fluids interflow spatial portion 43 of the groove 40 of atomizing air introduction part 37 in the vertical view and forming.Therefore, atomizing air 46 forms eddy current and mixes with liquid fuel 24 at two fluids interflow spatial portion 43.Mixed fluid fuel 24 and atomizing air 46 more fully thus.Whereby, the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 is atomized more reliably, and the burning quality of liquid fuel 24 also is able to further improvement.
According to the two-fluid spray burner 11 of embodiment 1, a plurality of grooves 40 of atomizing air introduction part 37 are formed on around the rotational symmetric position of central axis of two fluids interflow spatial portion 43.Therefore, can make circumferentially being evenly distributed of the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38, improve the combustion characteristics of liquid fuel 24 whereby.
In addition, the two-fluid spray burner 11 of embodiment 1 is provided with liquid fuel tank 19 to the helical spring 36 that presses down.Therefore, the bottom 21 of liquid fuel tank 19 is pressed against and realizes firmly contact on the atomizing air introduction part 37 of second fluid nozzle 38.Therefore, the bottom surface 21b of the bottom 21 of fuel tank 19 firmly contacts each other with the end face 37a of atomizing air introduction part 37, prevents from whereby to form the gap between contact-making surface 21b and 37a.Therefore, prevent that the wide jeting effect that atomizing air 46 flows into the part except groove 40 and gives full play to groove 40 from being possible.
In addition, be obconic according to two-fluid spray burner 11, two fluids of embodiment 1 interflow spatial portion 43, and spray holes 44 is formed at the vertex position place in turbination space 43.Therefore, liquid fuel 24 can fully mix at two fluids interflow spatial portion 43 with atomizing air 46.The liquid fuel 24 that ejects from spray holes 44 is able to atomize more reliably, further improves the combustion characteristics of liquid fuel 24 whereby.
In addition, two-fluid spray burner 11 according to embodiment 1, two-fluid spray burner 11 is configured such that tubular fuel gas passage 14 is formed on sprayer urceolus 27 and between the gaseous fuel supply pipe 47 of sprayer urceolus 27, and allows gaseous fuel 49 to flow down and eject from the lower end of fuel gas passage 14 and burnt along fuel gas passage 14.Therefore, the gaseous fuel 49 that ejects from tubular fuel gas passage 14 is circumferentially uniformly.Therefore, it is possible improving combustion characteristics, for example realizes the flame stabilization effect by gaseous fuel 49 with low discharge feed fluid fuel 24 time whereby.
In addition, in the two-fluid spray burner 11 of embodiment 1, under the end 25A of liquid fuel within supply pipe 25 and the situation that the inner peripheral surface 20a of the sidepiece 20 of liquid fuel tank 19 contacts, even if the flow of the liquid fuel 24 of discharging from liquid fuel supply pipe 25 is very low, liquid fuel 24 also can flow down along inner peripheral surface 20a.Therefore, realize being possible more stably from liquid fuel tap 22 draining liquid fuels 24.In other words, when liquid fuel 24 dripped with the drop form, the liquid level 23 that is stored in the liquid fuel 24 in the liquid fuel tank 19 fluctuated widely.Under liquid level 23 low-down situations, can think that liquid fuel tap 22 can temporarily expose and termination draining liquid fuel 24.Yet, allow liquid fuel 24 to flow down and can prevent this defective along the inner peripheral surface 20a of liquid fuel tank 19.
In addition, two-fluid spray burner 11 according to embodiment 1, two-fluid spray burner 11 is configured such that combustion air 50 is stopped and be imported into the outer circumferential side away from second fluid nozzle 38 of plate 18 by plate 18 after combustion air passage 15 flows down, enter combustion chamber 13 to flow through combustion air hole 52.Therefore, be that a part of combustion air 50 13 mixes with the liquid fuel 24 that ejects from second fluid nozzle 38 and is used to combustion of liquid fuel 24 in the combustion chamber, and remaining combustion air 50 further flow downward and mix with burning and gas-exhausting that burning produces.Thus, realize that via the once supply (step) of combustion air the appropriateness of combustion air 50 and liquid fuel 24 mixes that to produce a large amount of burning and gas-exhaustings under the situation that is incorporated in sub-cooled flame not be possible.In other words, realize allly if can utilizing simple structure to produce a large amount of burning and gas-exhaustings and can not causing producing unburned gas and the burner of unexpected two-fluid spray burner that catches fire and so on is possible.
In addition, plate 18 makes combustion air 50 flow into combustion chamber 13 in the position away from second fluid nozzle 38.Therefore, the position that can a part of combustion air 50 be supplied to fuel is set to down away from plate 18.Thus, the position of flame prevents whereby that down away from plate 18 coal smoke is attached to the bottom surface of plate 18.Although a large amount of coal smokes that are attached on plate 18 bottom surfaces can cause many defectives, for example stop up second fluid nozzle 38 and cause two fluid spray devices, 12 abnormal heatings owing to coal smoke absorbs from flame radiation heat owing to coal smoke causes, but by preventing that coal smoke is attached to the bottom surface of plate 18 as mentioned above, also can prevent such defective.
In addition, two-fluid spray burner 11 according to embodiment 1, two-fluid spray burner 11 is configured such that the bottom surface that slave plate 18 is set extends and be used for first 16 of delay in supply combustion air downwards, and the tubular combustion air passage 53 that is communicated with combustion air hole 52 is formed on first 16 and burner urceolus 48 between.Whereby, make the combustion air 50 in process combustion air hole 52 flow down along combustion air passage 53, the lower end from combustion air passage 53 flows into combustion chamber 13 then.Therefore, it is possible postponing a part of combustion air 50 is supplied to the liquid fuel 24 that ejects from second fluid nozzle 38.In other words, the position that can a part of combustion air 50 be supplied to liquid fuel 24 is set to down away from plate 18.Therefore, the position of flame also is set to down to prevent whereby that away from plate 18 coal smoke is attached to the bottom surface of plate 18.
By the operability effect that position that aforesaid plate 18 realizes that a part of combustion air 50 is supplied to liquid fuel 24 is set to down away from plate 18 only is set is possible.Yet as described in embodiment 1, by being provided for first 16 of delay in supply combustion air, the position that can more a part of combustion air 50 be fed into liquid fuel 24 is set to down away from plate 18.
In addition, when since size restrictions of two-fluid spray burner 11 or the like plate 18 can not be fabricated to enough greatly, and the distance between second fluid nozzle 38 and the combustion air hole 52 can not make during long enough, this partial combustion that supplies to liquid fuel 24 becomes excessive with air 50 and can sub-cooled flame.On the contrary, by being provided with and shown in embodiment 1, being used for first 16 of delay in supply combustion air, the position that can not only combustion air 50 be supplied to liquid fuel 24 is set to down away from plate 18, and this partial combustion that can will supply to liquid fuel 24 is reduced to appropriate amount with the amount of air 50.In view of this, it is effective first 16 of being similar to embodiment 1 being set.By first 16 size that can reduce plate 18 is set, and can miniaturization two-fluid spray burner 11.
In addition, according to the two-fluid spray burner 11 of embodiment 1, extend the bottom surface of slave plate 18, and second 17 of being used to prevent to remain in a standstill is arranged on first 16 inside that is used for the delay in supply combustion air.Therefore, can prevent that the viscous flow (convection current) of liquid fuel 24 from appearing near the bottom surface of plate 18 by second 17 of being used to prevent remain in a standstill.Whereby, near prevent to remain in a standstill liquid fuel 24 bottom surface of plate 18 is on fire and prevent that the bottom surface that coal smoke is attached to plate 18 from being possible.
In addition, according to the two-fluid spray burner 11 of embodiment 1, by utilizing burner urceolus 48 around flame, flame (liquid fuel 24 that is sprayed) and combustion air 50 can the 13 fully mixing in the combustion chamber, improve combustion characteristics whereby.
＜embodiment 2 〉
Fig. 6 (a) shows the longitudinal cross-section view according to the structure of the bottom of two fluid spray devices of the two-fluid spray burner of the embodiment of the invention 2, and Fig. 6 (b) shows the vertical view (view on the arrow E direction of Fig. 6 (a)) of the second fluid nozzle that is provided for two fluid spray devices.
Shown in Fig. 6 (a) and Fig. 6 (b), in the second fluid nozzle 38 of the two fluid spray devices 12 of embodiment 2, groove (slit) 61 is formed on four positions in atomizing air introduction part 37 peripheries.These grooves 61 are the collision type groove.Groove 61 upwards extends in the footpath of the two fluids interflow spatial portion 43 with ring-type vertical view respectively, and is formed on the position of central axis (central axis of the spray holes 44 in the example of accompanying drawing) the rotation symmetry (along circumferentially equidistantly) around two fluids interflow spatial portion 43.
In two fluid spray devices 21, after atomizing air passage 28 flows down, atomizing air 46 flows through the groove 61 of the atomizing air introduction part 37 in the second fluid nozzle 38 and increases flow velocity, and is imported into two fluids interflow spatial portion 43.Atomizing air 46 and the liquid fuel 24 of discharging collision and interflow (mixing) the spatial portion 43 of two fluids interflow from the liquid fuel tap 22 of liquid fuel tank 19.Whereby, energy is mixed fluid fuel 24 and atomizing air 46 fully, and utilizes atomizing air 46 to make liquid fuel 24 atomizings, then liquid fuel and atomizing air 46 is together sprayed into combustion chamber 13 from the spray holes 44 of second fluid nozzle 38.
The structure of the other parts of the two fluid spray devices 12 of Fig. 6 is identical with the structure of the other parts of the two fluid spray devices 12 of Fig. 4.The structure of the part except two fluid spray devices of the two-fluid spray burner of embodiment 2 is identical to the two-fluid spray burner 11 of Fig. 3 with Fig. 1.
According to the two-fluid spray burner of embodiment 2, can realize following operability effect, in addition, can obtain and previous embodiment 1 identical operations effect.
Specifically, two-fluid spray burner according to embodiment 2, radial shape by the interflow of two fluids in vertical view spatial portion 43 becomes the groove 61 of atomizing with gas introduction part 37, and atomizing air 46 mixes with liquid fuel 24 with liquid fuel 24 collisions at two fluids interflow spatial portion 43.Mixed fluid fuel 24 and atomizing air 46 more fully thus.The liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 is atomized more reliably, further improve the combustion characteristics of liquid fuel 24 thus.
In addition, a plurality of grooves 61 of atomizing air introduction part 37 are formed on around the rotational symmetric position of central axis of two fluids interflow spatial portion 43.Therefore, what can make the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 is distributed in week upwards evenly, improves the combustion characteristics of liquid fuel 24 whereby.
＜embodiment 3 〉
Fig. 7 (a) shows the longitudinal cross-section view according to the structure of the bottom of two fluid spray devices of the two-fluid spray burner of the embodiment of the invention 3, and Fig. 7 (b) shows the vertical view (view on the arrow F of Fig. 7 (a) direction) of the second fluid nozzle that is provided for two fluid spray devices.
As shown in Figure 7, in the two fluid spray devices 12 of embodiment 3, inner surface (end face) 21a of the bottom 21 of liquid fuel tank 19 is taper (turbination) faces, and small liquid fuel tap 22 is formed at center (vertex position of turbination face).On outer surface (bottom surface) 21b of the bottom 21 of liquid fuel within case 19, form by face by taper (conical butt) for outside 21b-1, and inner 21b-2 is made up of the ring-type horizontal plane.
On the other hand, the atomizing air introduction part 37 of second fluid nozzle 38 forms annular, and inner circumferential surface 37b is made up of taper (conical butt) face.The outside 21b-1 of the bottom surface of this bottom 21 21b (taper surface part) in abutting connection with and be coupled under the state of inner peripheral surface 37b (taper surface part) of atomizing air introduction part 37, liquid fuel tank 19 is installed on the atomizing air introduction part 37.In this case, by helical spring 36 (see figure 4)s with liquid fuel tank 19 to pressing down, the inner peripheral surface 37b (taper surface part) that the outside 21b-1 of the bottom surface 21b of the bottom 21 of liquid fuel tank 19 (taper surface part) is pressed against atomizing air introduction part 37 whereby goes up and forms firm contact, thereby prevents from the gap to occur between contact-making surface 21b-1 and 37b.
The nozzle body 39 of second fluid nozzle 38 comprises the turbination space (recess) 42 that is formed in the middle body, and the small spray holes 44 that is formed at this center (vertex position in turbination space 42).The space 41 of atomizing air introduction part 37 and the space 42 of nozzle body 39 are each other continuously and form two fluids interflow spatial portion 43.In other words, two fluids interflow spatial portion 43 has ring plain view (vertical view), and has pyramidal structure, and its diameter is towards spray holes 44 convergents.In atomizing air introduction part 37, groove (slit) 40 is formed on two positions that make progress in its week.These grooves 40 are the eddy current type groove that is similar to the groove 40 of Fig. 5, and extend on the tangential direction of the circumference of the interflow of two fluids in vertical view spatial portion 43.In addition, groove 40 is formed on the rotational symmetric position of central axis (along circumferentially equidistantly) around two fluids interflow spatial portion 43.The groove that is formed on atomizing air introduction part 37 places is not limited to the eddy current type groove, and can be the collision type groove as Fig. 6.
The structure of the other parts of the two fluid spray devices 12 of Fig. 7 is identical with the structure of the other parts of the two fluid spray devices 12 of Fig. 4.The structure of the part except two fluid spray devices of the two-fluid spray burner of embodiment 3 is identical to the two-fluid spray burner 11 of Fig. 3 with Fig. 1.
According to the two-fluid spray burner of embodiment 3, can realize following operability effect, in addition, can obtain and previous embodiment 1 and embodiment 2 identical operations effects.
Specifically, two-fluid spray burner according to embodiment 3, taper surface part (the outside 21b-1 of the bottom surface 21b of the bottom 21) adjacency of liquid fuel within case 19 also is coupled under the state of atomizing with the taper surface part (inner peripheral surface 37b) of gas introduction part 37, and liquid fuel tank 19 is installed in atomizing and uses on the gas introduction part 37.Therefore, be easy to the to align central axis of liquid fuel tank 19 and second fluid nozzle 38.Thus, liquid fuel tank 19 is installed in this central authorities.Whereby, the width of atomizing air passage 28 can be fabricated to week upwards evenly, thereby can make atomizing air 46 in atomizing air passage 28, be flowing in week upwards evenly.This make to keep the symmetry (the perhaps symmetry of flame) of the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 become possibility.
In addition, two-fluid spray burner according to embodiment 3, by helical spring 36 (see figure 4)s with liquid fuel tank 19 to pressing down, the bottom 21 of liquid fuel tank 19 be pressed against make on the atomizing air introduction part 37 of second fluid nozzle 38 fuel tank 19 bottom 21 taper surface part (outside 21b-1) and atomizing air introduction part 37 taper surface partly (inner peripheral surface 37b) firmly contact, thereby prevent between contact-making surface 21b-1 and 37b, the gap to occur.Therefore, prevent that the part that atomizing air 46 flows into except groove 40 from being possible, give full play to the wide jeting effect of groove 40 whereby.
＜embodiment 4 〉
Fig. 8 (a) shows according to the longitudinal cross-section view of the structure of the bottom of two fluid spray devices in the two-fluid spray burner of the embodiment of the invention 4 (along the longitudinal cross-section view of the line G-G of 8 (b) intercepting); Figure (b) shows the upward view (view on the arrow H of Fig. 8 (a) direction) of the liquid fuel tank that is provided for two fluid spray devices; Fig. 8 (c) is the view on the arrow I of Fig. 8 (b) direction; And Fig. 8 (d) is the transverse sectional view along the line J-J intercepting of Fig. 8 (a).
As shown in Figure 8, in the two fluid spray devices 12 of embodiment 4, inner surface (end face) 21a of the bottom 21 of liquid fuel tank 19 is made up of taper (turbination) face, and small liquid fuel tap 22 is formed at center (vertex position of turbination face).In addition, on outer surface (bottom surface) 21b of the bottom 21 of liquid fuel within case 19, form by face by taper (conical butt) for outside 21b-1, and inner 21b-2 is made up of the ring-type horizontal plane.
On the other hand, second fluid nozzle 38 does not comprise atomizing air introduction part (see figure 7) and locates with the lower end (can by fixing independent bodies such as welding) that sprayer urceolus 27 is integrally formed in sprayer urceolus 27.Second fluid nozzle 38 has inner surface (end face) 38a that is made up of taper surface (turbination).The outside 21b-1 of the bottom surface of bottom 21 21b (taper surface part) in abutting connection with and be coupled under the state of inner surface 38a (taper surface part) of second fluid nozzle 38, liquid fuel tank 19 is installed on the second fluid nozzle 38.In this case, helical spring 36 (see figure 4)s with liquid fuel tank 19 to pressing down, the inner surface 38a (taper surface part) that makes the outside 21b-1 (taper surface part) of bottom surface 21b of bottom 21 of liquid fuel tank 19 be pressed against second fluid nozzle 38 goes up and realizes firmly contact, thereby prevents from the gap to occur between contact-making surface 21b-1 and 38b.
By the inner surface 38a of pyramidal structure in turbination space that the middle body of second fluid nozzle 38 forms as two fluids interflow spatial portion 43.Small spray holes 44 is formed on the center (vertex position in turbination space 43) of two fluids interflow spatial portion 43 and is communicated with two fluids interflow spatial portion 43.Specifically, two fluids interflow spatial portion 43 has ring plain view (vertical view), and has pyramidal structure, and its diameter is towards spray holes 44 convergents.
In the bottom surface 21b side of the bottom 21 of liquid fuel within case 19, groove (slit) 71 is formed on two positions on its periphery.These grooves 71 are the eddy current type groove, and extend on the tangential direction of the circumference of the interflow of two fluids in vertical view spatial portion 43.In addition, groove 71 is formed on the rotational symmetric position of central axis (along circumferentially equidistantly) around two fluids interflow spatial portion 43.
Therefore, after atomizing air passage 28 flows down, atomizing air 46 flow through liquid fuel tank 19 bottom 21 groove 71 and increase flow velocity, be imported into two fluids interflow spatial portion 43 then.Atomizing air 46 becomes eddy current and collaborates (mixing) with the liquid fuel 24 of discharging from the liquid fuel tap 22 of liquid fuel tank 19 in the spatial portion 43 of two fluids interflow.Whereby, liquid fuel 24 and atomizing air 46 fully mix, and utilize atomizing air 46 to make liquid fuel 24 atomizing, then liquid fuel are sprayed into combustion chamber 13 from the spray holes 44 of second fluid nozzle 38.
The structure of the other parts of the two fluid spray devices 12 of Fig. 8 is identical with the structure of the other parts of the two fluid spray devices 12 of Fig. 4.The structure of the part except two fluid spray devices of the two-fluid spray burner of embodiment 4 is identical to the two-fluid spray burner 11 of Fig. 3 with Fig. 1.
According to the two-fluid spray burner of embodiment 3, can realize following operability effect, in addition, can obtain and previous embodiment 1 identical operations effect.
Two-fluid spray burner according to embodiment 4, this two-fluid spray burner is configured such that from liquid fuel tap 44 and discharges and flow into the liquid fuel 24 of two fluids interflow spatial portion 43 is imported into two fluids interflow spatial portion 43 with flowing down the groove 71 of the bottom 21 of then flowing through liquid fuel tank 19 along atomizing with gas passage 28 atomizing air 46 and collaborate at two fluids interflow spatial portion 43, then, this liquid fuel and atomizing air 46 are together injected from spray holes 44.Therefore, liquid fuel 24 fully mixes with flow velocity increases (horizontal velocity component increase) via groove 71 atomizing air 46 at two fluids interflow spatial portion 43, and is then, injected from spray holes 44.Thus, than the situation that two fluids interflow spatial portion 43 and groove 71 are not set, the angle of flare of the liquid fuel 24 that is sprayed is bigger, and liquid fuel 24 can be atomized more reliably, improves the combustion characteristics of liquid fuel 24 whereby.
In addition, the taper surface of liquid fuel within case 19 part (the outside 21b-1 of the bottom surface 21b of bottom 21) in abutting connection with and be coupled under the state of taper surface part (inner surface 38a) of second fluid nozzle 38, liquid fuel tank 19 is installed on the second fluid nozzle 38.Thus, be easy to the to align central axis of liquid fuel tank 19 and second fluid nozzle 38.Therefore, liquid fuel tank 19 is installed in this central authorities.Whereby, the width of atomizing air passage 28 can be fabricated to week upwards evenly, thereby can make atomizing air 46 in atomizing air passage 28, be flowing in week upwards evenly.This makes the symmetry (the perhaps symmetry of flame) guarantee the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 become possibility.
In addition, the tangential direction of the circumference of the two fluids interflow spatial portion 43 of the groove 71 of the bottom 21 of liquid fuel tank 19 in the vertical view and forming.Therefore, atomizing air 46 forms eddy current and mixes with liquid fuel 24 at two fluids interflow spatial portion 43.Mixed fluid fuel 24 and atomizing air 46 more fully thus.Thereby, the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 is atomized reliably, further improve the combustion characteristics of liquid fuel 24 whereby.
In addition, described a plurality of grooves 71 of the bottom 21 of liquid fuel tank 19 are formed on around the rotational symmetric position of central axis of two fluids interflow spatial portion 43.Therefore, can make upwards being evenly distributed of the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38, improve the combustion characteristics of liquid fuel 24 whereby in week.
Two-fluid spray burner according to embodiment 4, by helical spring 36 (see figure 4)s with liquid fuel tank 19 to pressing down, the bottom surface 21b of the bottom 21 of liquid fuel tank 19 is pressed against on the second fluid nozzle 38, so that the taper surface of the bottom 21 of fuel tank 19 part (outside 21b-1) firmly contacts with the taper surface part (inner surface 38a) of second fluid nozzle 38, thereby prevent between contact-making surface 21b-1 and 38a, the gap to occur.Therefore, prevent that the part that atomizing air 46 flows into except groove 71 from being possible, give full play to the wide jeting effect of groove 71 whereby.
＜embodiment 5 〉
Fig. 9 (a) shows according to the longitudinal cross-section view of the structure of the bottom of two fluid spray devices in the two-fluid spray burner of the embodiment of the invention 5 (along the cross sectional view of the line K-K of Fig. 9 (b) intercepting); Fig. 9 (b) shows the upward view (view on the arrow H of Fig. 9 (a) direction) of the liquid fuel tank that is provided for two fluid spray devices; And Fig. 9 (c) is the transverse sectional view along the line M-M intercepting of Fig. 9 (a).
As shown in Figure 9, in the two fluid spray devices 12 of embodiment 5, inner surface (end face) 21a of the bottom 21 of liquid fuel tank 19 is made up of taper (turbination) face, and small liquid fuel tap 22 is formed at center (vertex position of turbination face).In addition, on outer surface (bottom surface) 21b of the bottom 21 of liquid fuel within case 19, form by face by taper (conical butt) for outside 21b-1, and inner 21b-2 is made up of the ring-type horizontal plane.
On the other hand, second fluid nozzle 38 does not comprise atomizing air introduction part (see figure 7) and is integrally formed in the lower end (can by fixing independent bodies such as welding) of sprayer urceolus 27 with sprayer urceolus 27.Second fluid nozzle 38 has inner surface (end face) 38a that is made up of taper surface (turbination).The outside 21b-1 of the bottom surface of bottom 21 21b (taper surface part) in abutting connection with and be coupled under the state of inner surface 38a (taper surface part) of second fluid nozzle 38, liquid fuel tank 19 is installed on the second fluid nozzle 38.In this case, by helical spring 36 (see figure 4)s with liquid fuel tank 19 to pressing down, the inner surface 38a (taper surface part) that makes the outside 21b-1 (taper surface part) of bottom surface 21b of bottom 21 of liquid fuel tank 19 be pressed against second fluid nozzle 38 goes up and realizes firmly contact, thereby prevents from the gap to occur between contact-making surface 21b-1 and 38b.
By the inner surface 38a of pyramidal structure in turbination space that the middle body of second fluid nozzle 38 forms as two fluids interflow spatial portion 43.Small spray holes 44 is formed on the center (vertex position in turbination space 43) of two fluids interflow spatial portion 43 and is communicated with two fluids interflow spatial portion 43.Specifically, two fluids interflow spatial portion 43 has ring plain view (vertical view), and has pyramidal structure, and its diameter is towards spray holes 44 convergents.
In the bottom surface 21b side of the bottom 21 of liquid fuel within case 19, groove (slit) 81 is formed on two positions on its periphery.These grooves 81 are the collision type groove, and the extension in the radial direction of the interflow of two fluids in vertical view spatial portion 43.In addition, groove 81 is formed on the rotational symmetric position of central axis (along circumferentially equidistantly) around two fluids interflow spatial portion 43.
After atomizing air passage 28 flows down, atomizing air 46 flow through liquid fuel tank 19 bottom 21 groove 81 and increase flow velocity, be imported into two fluids interflow spatial portion 43 then.Atomizing air 46 collides and interflow (mixing) with the liquid fuel 24 of discharging from the liquid fuel tap 22 of liquid fuel tank 19 in the spatial portion 43 of two fluids interflow.Whereby, liquid fuel 24 and atomizing air 46 can fully mix, and utilize atomizing air 46 to make liquid fuel 24 atomizings, then liquid fuel and atomizing air 46 are together sprayed into combustion chamber 13 from the spray holes 44 of second fluid nozzle 38.
The structure of the other parts of the two fluid spray devices 12 of Fig. 9 is identical with the structure of the other parts of the two fluid spray devices 12 of Fig. 4.The structure of the part except two fluid spray devices of the two-fluid spray burner of embodiment 5 is identical to the two-fluid spray burner 11 of Fig. 3 with Fig. 1.
According to the two-fluid spray burner of embodiment 5, can realize 4 identical operations effects with embodiment, in addition, can obtain and previous embodiment 1 identical operations effect.
Two-fluid spray burner according to embodiment 5, this two-fluid spray burner is configured such that from liquid fuel tap 44 and discharges and flow into the liquid fuel 24 of two fluids interflow spatial portion 43 is imported into two fluids interflow spatial portion 43 with flowing down the groove 81 of the bottom 21 of then flowing through liquid fuel tank 19 along atomizing with gas passage 28 atomizing air 46 and collaborate at two fluids interflow spatial portion 43, then, this liquid fuel and atomizing air 46 are together injected from spray holes 44.Therefore, liquid fuel 24 fully mixes with flow velocity increases (horizontal velocity component increase) via groove 81 atomizing air 46 at two fluids interflow spatial portion 43, and is then, injected from spray holes 44.Thus, than the situation that two fluids interflow spatial portion 43 and groove 81 are not set, the angle of flare of the liquid fuel 24 that is sprayed is bigger, and liquid fuel 24 can be atomized more reliably, improves the combustion characteristics of liquid fuel 24 whereby.
In addition, the taper surface of liquid fuel within case 19 part (the outside 21b-1 of the bottom surface 21b of bottom 21) in abutting connection with and be coupled under the state of taper surface part (inner surface 38a) of second fluid nozzle 38.Thus, the central axis of be easy to align liquid fuel tank 19 and second fluid nozzle 38, liquid fuel tank 19 is installed on the second fluid nozzle 38.Therefore, liquid fuel tank 19 is installed in this central authorities.Whereby, the width of atomizing air passage 28 can be fabricated to week upwards evenly, thereby can make atomizing air 46 in atomizing air passage 28, be flowing in week upwards evenly.This makes the symmetry (the perhaps symmetry of flame) guarantee the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 become possibility.
In addition, the tangential direction of the circumference of the two fluids interflow spatial portion 43 of the groove 81 of the bottom 21 of liquid fuel tank 19 in the vertical view and forming.Therefore, atomizing air 46 forms eddy current and mixes with liquid fuel 24 at two fluids interflow spatial portion 43.Mixed fluid fuel 24 and atomizing air 46 more fully thus.Thereby, the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38 is atomized reliably, further improve the combustion characteristics of liquid fuel 24 whereby.
In addition, described a plurality of grooves 81 of the bottom 21 of liquid fuel tank 19 are formed on around the rotational symmetric position of central axis of two fluids interflow spatial portion 43.Therefore, can make upwards being evenly distributed of the liquid fuel 24 that ejects from the spray holes 44 of second fluid nozzle 38, improve the combustion characteristics of liquid fuel 24 whereby in week.
In the two-fluid spray burner of embodiment 4, by helical spring 36 (see figure 4)s with liquid fuel tank 19 to pressing down, the bottom surface 21b of the bottom 21 of liquid fuel tank 19 is pressed against on the second fluid nozzle 38, so that the taper surface of the bottom 21 of fuel tank 19 part (outside 21b-1) firmly contacts with the taper surface part (inner surface 38a) of second fluid nozzle 38, thereby prevent between contact-making surface 21b-1 and 38a, the gap to occur.Therefore, prevent that the part that atomizing air 46 flows into except groove 81 from being possible, give full play to the wide jeting effect of groove 81 whereby.
＜embodiment 6 〉
Figure 10 (a) shows the longitudinal cross-section view according to the structure of the bottom of two fluid spray devices in the two-fluid spray burner of the embodiment of the invention 6; And Figure 10 (b) is the transverse sectional view along the line L-L intercepting of Figure 10 (a).
As shown in figure 10, in the two fluid spray devices 12 of embodiment 6, inner surface (end face) 21a of the bottom 21 of liquid fuel tank 19 is made up of taper (turbination) face, and small liquid fuel tap 22 is formed at center (vertex position of turbination face).Outer surface (bottom surface) 21b of the bottom 21 of liquid fuel tank 19 is made up of taper (conical butt) face.On the other hand, second fluid nozzle 38 does not comprise atomizing air introduction part (see figure 7) and is integrally formed in the lower end (can by fixing independent bodies such as welding) of sprayer urceolus 27 with sprayer urceolus 27.In second fluid nozzle 38, inner surface (end face) 38a is made up of taper (turbination) face.
The bottom of the outer peripheral face 20b of the sidepiece 20 of liquid fuel within case 19 is provided with a plurality of supports 91 (being exemplified as 4 in the accompanying drawing) in outstanding mode.The week that these supports 91 are arranged on sidepiece 20 equally spacedly makes progress.The outside 91a-1 of bottom surface 91a is made up of the intilted taper surface of inner surface 38a along second fluid nozzle 38 respectively.Thus, the outside 91a-1 of the bottom surface of support 91 91a in abutting connection with and be coupled under the state of inner surface 38a of second fluid nozzle 38, liquid fuel tank 19 is supported.Therefore, guaranteed taper (the fall conical butt) gap between the inner surface 38a of the outer surface 21a of bottom 21 of liquid fuel tank 19 and second fluid nozzle 38, and these gaps are used as atomizing air passage 92.In other words, the first atomizing air passage 28 in the outside communicates with each other via the two fluids interflow spatial portion 43 of the second atomizing air passage 92 with the inboard.
Two fluids interflow spatial portion 43 is formed on the turbination space in the middle body of second fluid nozzle 38 for the inner surface 38a by pyramidal structure.Small spray holes 44 is formed at the center (vertex position in turbination space 43) of two fluids interflow spatial portion 43 and is communicated with turbination spatial portion 43.Specifically, two fluids interflow spatial portion 43 is positioned at below the liquid fuel tap 22 and has pyramidal structure, and this pyramidal structure comprises ring plain view (vertical view), and its diameter is towards spray holes 44 convergents.
After atomizing air passage 28 flows down, atomizing air 46 flows through the atomizing air channel part 93 between the support 91, and flows through atomizing air passage 92 and be imported into two fluids interflow spatial portion 43.Atomizing air 46 collides and interflow (mixing) at two fluids interflow spatial portion 43 with the liquid fuel 24 of discharging from the liquid fuel tap 22 of liquid fuel tank 19.Liquid fuel 24 together sprays into combustion chamber 13 from the spray holes 44 of second fluid nozzle 38 with atomizing air 46 then by atomizing air 46 atomizings.
The structure of the other parts of the two fluid spray devices 12 of Figure 10 is identical with the structure of the other parts of the two fluid spray devices 12 of Fig. 4.The structure of the part except two fluid spray devices of the two-fluid spray burner of embodiment 6 is identical to the two-fluid spray burner 11 of Fig. 3 with Fig. 1.
According to the two-fluid spray burner of embodiment 6, can realize following operability effect, in addition, can obtain and previous embodiment 1 identical operations effect.
Specifically, two-fluid spray burner according to embodiment 6, discharge and flow into the liquid fuel 24 of two fluids interflow spatial portion 43 and flow down, flow through the atomizing air channel part 93 between the support 91 along first atomizing with gas passage 28 and flow through the second atomizing air passage 92 and the atomizing air 46 that is imported into two fluids interflow spatial portion 43 collaborates spatial portion 43 at two fluids and collaborates from liquid fuel tap 22, then, liquid fuel and atomizing air 46 are together injected from spray holes 44.Therefore, liquid fuel 24 mixes with atomizing air 46 at two fluids interflow spatial portion 43, and is injected from the spray holes 44 of second fluid nozzle 38 then.Thus, than the situation that two fluids interflow spatial portion 43 is not set, the angle of flare of liquid fuel 24 is bigger, and liquid fuel 24 is atomized reliably, improves the combustion characteristics of liquid fuel 24 whereby.
＜embodiment 7 〉
Figure 11 shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 7; And Figure 12 is the transverse sectional view along the line M-M intercepting of Figure 11.
As Figure 11 and shown in Figure 12, in the two-fluid spray burner of embodiment 7, plate 18 is a porous plate.Specifically, in annular plate 18, be formed with a plurality of combustion airs hole 101.All combustion air holes 101 all are arranged on inside, combustion air hole 52 (first 16).Therefore, after combustion air passage 15 flows down, most of combustion air 50 flows through the combustion air passage 53 that is positioned at first 16 outside and flows into combustion chamber 13 through the combustion air hole 52 on the periphery of plate 19.Simultaneously, a part of combustion air 50 flows through the combustion air hole 101 that is positioned at first 16 inboard and flows into combustion chamber 13.
The structure of the other parts of the two-fluid spray burner 11 of Figure 11 and Figure 12 is identical to the structure of the other parts of the two-fluid spray burner 11 of Fig. 3 with Fig. 1.
According to the two-fluid spray burner of embodiment 7, can realize following operability effect.In addition, can obtain and previous embodiment 1 identical operations effect.
Specifically, according to the two-fluid spray burner of embodiment 7, by a plurality of additional combustion are formed on airport 101 in the plate 18 of 52 inboards, combustion air hole, a part of combustion air 50 flows through these combustion air holes 101.This energy of flow of combustion air 50 is suppressed near the viscous flow that occurs combustion air the bottom surface of plate 18, reduces coal smoke thus and is attached to possibility on the plate 18.In addition, the combustion air of low temperature flows near the second fluid nozzle 38 via other combustion air hole 101.Therefore, it is possible utilizing combustion air to obtain cooling effect on second fluid nozzle 38, and this second fluid nozzle is easy to by from flame radiation heat and by superheated.
＜embodiment 8 〉
Figure 13 is the system schematic of schematically illustrated fuel cell generation according to the embodiment of the invention 8.Figure 13 shows any two-fluid spray burner in the previous embodiment 1 to 7 as the example under the thermal source situation of the modifier in the fuel cell generation.
As shown in figure 13, combustion furnace 112 is arranged in the top of modifier 111, and the two-fluid spray burner 11 of any is inserted into the combustion furnace 112 from the top in the previous embodiment 1 to 7.Two-fluid spray burner 11 is connected to unshowned liquid fuel supply system, atomizing air feed system and combustion air feed system.The details of two-fluid spray burner 11 as mentioned above.
Modifier 111 is connected to unshowned raw material supplying system.The raw material supplying system supplies to modifier 111 with water and upgrading with fuel, and this upgrading fuel is the raw material that is used for upgrading, for example methane gas or kerosene.In modifier 111, utilize at the two-fluid spray burner 11 a large amount of burning and gas-exhaustings that produce that burn upgrading is carried out the steam upgrading with fuel, produce modification gas (hydrogen-rich gas) thus.
The modification gas that is produced by modifier 11 is fed into the anode-side of fuel cell 113 as the fuel that is used to generate electricity.In fuel cell 113, air (oxygen) the generation electrochemical reaction that supplies to the modification gas (hydrogen) of anode-side and supply to cathode side is in order to generating.The residue modification gas that is not used for generating electricity at fuel cell 113 is back to two-fluid spray burner 11 also as the gaseous fuel that is used for burner combustion.
According to the fuel cell generation of embodiment 8, the thermal source of modifier 111 is any in the two-fluid spray burner 11 of previous embodiment 1 to 7.Therefore, the two-fluid spray burner 11 of bringing into play aforesaid good result can reduce or the like for modifier 111 provides performance improvement, cost.
In the above description, liquid fuel tank 19 includes only a liquid fuel tap 22, but is not limited to this.Liquid fuel tank 19 can comprise a plurality of liquid fuel tanks 22.
In the above description, the liquid fuel tap is arranged in the bottom of liquid fuel tank, but is not limited to this.The liquid fuel tap can be arranged in the sidepiece of liquid fuel tank.Specifically, if liquid fuel tank comprises tubular sidepiece and the bottom that is arranged on this sidepiece lower end, and this liquid fuel tank is configured to store from the liquid fuel of liquid fuel supply pipe supply and via single or multiple liquid fuel taps discharges stored liquid fuel, then liquid fuel tank can be the liquid fuel tank of any type, the single or multiple liquid fuel taps of being opened be lower than storage liquid fuel liquid level and be arranged in sidepiece or the bottom.
In the above description, liquid fuel tank is arranged on sprayer urceolus inside, but is not limited to this.For example, can be configured to this liquid fuel tank is arranged on the outside of sprayer urceolus, and the liquid fuel supply that will discharge from the liquid fuel tap of liquid fuel tank via pipe etc. is to liquid fuel and the space of atomizing with the gas interflow.
In the above description, the pressure that the upper end open of liquid fuel tank and allowing flows into the atomizing air of atomizing air passage acts on the liquid level that is stored in the liquid fuel in the liquid fuel tank, but is not limited to this.For example, atmosphere can be led in the upper end that it can be configured to liquid fuel tank.In other words, the liquid fuel of discharging from the liquid fuel supply pipe once was stored in the liquid fuel tank, and produced the fluid column head of liquid fuel by the pressure balance between inside and outside (the two fluids interflow spatial portion) of liquid fuel tank.Therefore, stored liquid fuel is discharged from the liquid fuel tap continuously.
In addition, in the foregoing description, be provided with two eddy current type grooves and four collision type grooves.But the quantity of groove is not limited to these, but can set suitable quantity.Yet in the even injection that makes progress in week, the quantity that it is desirable to the eddy current type groove is two or more in order to ensure atomized liquid fuel, and the quantity of collision type groove is three or more.
As mentioned above, plate (baffle plate) be set, be used for first of the delay in supply combustion air, be used to prevent to remain in a standstill second etc. structure (invention) can be applied to aforementioned two-fluid spray burner incessantly, aforementioned two-fluid spray burner comprises as being used for injecting LPG in liquefied condition and atomizing two fluid spray devices with the fuel injector of gas.Previous constructions (invention) can also be applied to comprise the burner of the fuel injector of the fuel injector of an injecting LPG in liquefied condition or gas jet fuel.
In addition, in the above description, the combustion air hole is arranged on the periphery of this plate (baffle plate) by on the periphery of plate (baffle plate), forming projection, but is not limited to this.For example, by peripheral perforate, only the combustion air hole need be arranged on the periphery of plate (baffle plate) and can be arranged on the periphery of this plate at plate (baffle plate) itself.
In the above description, plate (baffle plate) is a level board, but is not limited to this.This plate can be downward-sloping towards the outside internally.For example, plate 18 can be configured as frustum of a cone, shown in the chain-dotted line among Figure 11.This hang plate can not only provide and keep the function of combustion air away from fuel nozzle (second fluid nozzle 38), and the function with first intimate delay in supply combustion air can also be provided.
Industrial applicibility
The present invention relates to a kind of two-fluid spray burner, its burning utilizes atomizing with gas and mist The liquid fuel changed, and the present invention is effectively applied to the modifier of fuel cell generation Two-fluid spray burner, this two-fluid spray burner can be in the amount of the liquid fuel of supplying with very Move under the little condition.

Claims (12)

1. two-fluid spray burner, described two-fluid spray burner utilization atomizing makes liquid fuel atomization with gas and makes the atomized liquid fuel burning, and described burner is characterised in that and comprises:
Liquid fuel tank, described liquid fuel tank comprises the tubular sidepiece and is arranged on the bottom of the lower end of described sidepiece, described liquid fuel tank stores from the liquid fuel of liquid fuel supply pipe supply and from one or more liquid fuel taps and discharges stored liquid fuel, described one or more liquid fuel tap position opening below the liquid level of stored liquid fuel in described sidepiece or bottom, described burner is characterised in that
Utilize described atomizing to make the liquid fuel atomization of discharging from the described liquid fuel tap of described liquid fuel tank with gas, and the described liquid fuel that burns.
2. two-fluid spray burner according to claim 1 is characterized in that described liquid fuel tap at the bottom of described liquid fuel tank split shed,
Described burner is characterised in that also and comprises:
Be formed on the sidepiece of described liquid fuel tank and around the tubular atomizing gas passage between the urceolus of the periphery of described sidepiece; And
Second fluid nozzle, described second fluid nozzle is arranged on the lower end of described urceolus, and comprises nozzle body and last atomizing gas introduction part down, and described second fluid nozzle has:
Below described liquid fuel tap, be formed on described nozzle body and described atomizing and collaborate spatial portion with two fluids in the middle body of gas introduction part;
One or more spray holes, described one or more spray holes are formed in the described nozzle body, and lead to described two fluids interflow spatial portion; And
One or more grooves, described one or more grooves are formed on described atomizing with in the gas introduction part, and allow described two fluids interflow spatial portion and described atomizing to communicate with each other with gas passage,
Described burner is characterised in that
Described liquid fuel tank is installed in described atomizing with on the gas introduction part, and
Discharge and the liquid fuel that flows into described two fluids interflow spatial portion is imported into the described atomizing that described two fluids collaborate spatial portion and collaborates with gas with flowing down with gas passage along described atomizing and flow through described atomizing at described two fluids interflow spatial portion with the groove at gas introduction part place from described liquid fuel tap, then, described liquid fuel and atomizing are together injected from described spray holes with gas.
3. two-fluid spray burner according to claim 2 is characterized in that
The bottom surface of the bottom of described liquid fuel tank forms the taper surface part of taper,
Described atomizing also forms the taper surface part of taper with the end face of gas introduction part, and
The taper surface of described liquid fuel tank part in abutting connection with and be coupled under the state of described atomizing with the taper surface part of gas introduction part, described liquid fuel tank is installed in described atomizing with on the gas introduction part.
4. two-fluid spray burner according to claim 1 is characterized in that described liquid fuel tap at the bottom of described liquid fuel tank split shed, and described burner is characterised in that also and comprises:
Be formed on the sidepiece of described liquid fuel tank and around the tubular atomizing gas passage between the urceolus of the periphery of described sidepiece; And
Be arranged on the second fluid nozzle of the lower end of described urceolus, described second fluid nozzle has:
Under described liquid fuel tap, be formed on the two fluids interflow spatial portion in the middle body; And
One or more spray holes, described one or more spray holes form leads to described two fluids interflow spatial portion,
Described burner is characterised in that
The bottom surface of the bottom of described liquid fuel tank forms the taper surface part of taper,
The end face of described second fluid nozzle also forms the taper surface part of taper,
The taper surface of described liquid fuel tank part in abutting connection with and be coupled under the state of taper surface part of described second fluid nozzle, described liquid fuel tank is installed on the described second fluid nozzle,
One or more grooves are formed on the place, bottom of described liquid fuel tank, and described groove allows described atomizing to communicate with each other with gas passage and described two fluids interflow spatial portion, and
Discharge and the liquid fuel that flows into described two fluids interflow spatial portion collaborates with gas in described two fluids interflow spatial portion is imported into described two fluids interflow spatial portion with the groove at the place, bottom that flows down, then flows through described liquid fuel tank along described atomizing with gas passage described atomizing from described liquid fuel tap, then, described liquid fuel and described atomizing are together injected from described spray holes with gas.
5. according to each described two-fluid spray burner in the claim 2 to 4, it is characterized in that
Described two fluids interflow spatial portion has round-shaped when looking up in the side of overlooking, and
Described atomizing forms with the tangential direction of the groove of the bottom of the groove of gas introduction part or the described liquid fuel tank circumference of described two fluids interflow spatial portion when looking up in the side of overlooking.
6. according to each described two-fluid spray burner in the claim 2 to 4, it is round-shaped to it is characterized in that described two fluids interflow spatial portion has when looking up in the side of overlooking, and
Described atomizing is with the radially formation of the groove of the bottom of the groove of gas introduction part or described liquid fuel tank described two fluids interflow spatial portion when looking up in the side of overlooking.
7. according to claim 5 or 6 described two-fluid spray burners, it is characterized in that described atomizing is formed on the rotational symmetric position of central axis around described two fluids interflow spatial portion with described a plurality of grooves of the bottom of described a plurality of grooves of gas introduction part or described liquid fuel tank.
8. according to each described two-fluid spray burner in the claim 2 to 7, it is characterized in that also comprising:
Described liquid fuel tank to the pressing element that presses down, be is characterized in that
The bottom abutment of described liquid fuel tank is on the atomizing air introduction part of described second fluid nozzle and realize firmly contact, perhaps
The bottom abutment of described liquid fuel tank is on described second fluid nozzle and realize firmly contact.
9. two-fluid spray burner according to claim 1 is characterized in that
Described liquid fuel tap is at the bottom of described liquid fuel tank split shed,
Described burner is characterised in that also and comprises:
Be formed on the sidepiece of described liquid fuel tank and around the first atomizing gas passage of the tubular between the urceolus of the periphery of described sidepiece; And
Be arranged on the second fluid nozzle of the lower end of described urceolus, described second fluid nozzle has:
Under described liquid fuel tap, be formed on the two fluids interflow spatial portion in the middle body; And
One or more spray holes, described one or more spray holes form leads to described two fluids interflow spatial portion,
Described burner is characterised in that
The end face of described second fluid nozzle forms the taper surface part of taper,
The bottom surface of the bottom of described liquid fuel tank forms the taper surface part of taper,
A plurality of supports are outstanding on the sidepiece of described liquid fuel tank, and each bottom surface of support forms the taper surface part,
The taper surface of described support part in abutting connection with and be coupled under the state of taper surface part of described second fluid nozzle, described liquid fuel tank is installed on the described second fluid nozzle,
The gap that is formed on by described support between the taper surface part of the taper surface part of described liquid fuel tank and described second fluid nozzle is the second atomizing gas passage, and
From described liquid fuel tap discharge and the liquid fuel that flows into described two fluids interflow spatial portion described two fluids interflow spatial portion with flow down, flow through atomizing between the described support with gas passage along described first atomizing with gas passage portion and flow through described second atomizing and be imported into the described atomizing that described two fluids collaborate spatial portion with gas passage and collaborate with gas, then, described liquid fuel and described atomizing are together injected from described spray holes with gas.
10. according to each described two-fluid spray burner in the claim 2 to 9, it is characterized in that described two fluids interflow spatial portion is the turbination shape, and described spray holes is formed on the vertex position place in described turbination space.
11. according to each described two-fluid spray burner in the claim 2 to 10, it is characterized in that also comprising being formed on described urceolus and around the tubular fuel gas passage between the gaseous fuel supply pipe of the periphery of described urceolus,
Described burner is characterised in that gaseous fuel flows down and injected and burn from the lower end of described fuel gas passage along described fuel gas passage.
12., it is characterized in that the end of described liquid fuel supply pipe contacts with the inner peripheral surface of the sidepiece of described liquid fuel tank according to each described two-fluid spray burner in the claim 1 to 11.
CNA2007800299187A 2006-08-11 2007-08-07 Two-fluid spray burner Pending CN101501396A (en)

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JP2006219574A JP4697090B2 (en) 2006-08-11 2006-08-11 Two-fluid spray burner

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JP2008045776A (en) 2008-02-28
WO2008018430A1 (en) 2008-02-14
TWI327086B (en) 2010-07-11
TW200824793A (en) 2008-06-16
US20090305178A1 (en) 2009-12-10
KR20090037941A (en) 2009-04-16
JP4697090B2 (en) 2011-06-08
CA2656182A1 (en) 2008-02-14

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