CN101501397A - Burner - Google Patents

Abstract

A burner, such as a twin-fluid atomizing burner, which can generate a large amount of combustion exhaust gas with a simple structure, does not cause unburnt gas nor misfire, and can make flame shorter and a combustion exhaust gas flow rate distribution more uniform. The burner comprises a twin-fluid atomizer (12), a tubular combustion air flow path (15) formed between the atomizer and a burner outer tube (48) surrounding the atomizer, a plate (a blocking plate) (18) partitioning between this combustion air flow path and a combustion space (13), and a combustion air flowing hole (52) provided on the outer peripheral side of this plate, wherein combustion air (50) flowing downward through the combustion air flow path is intercepted by the plate and guided to the outer peripheral side of the plate to be thereby moved away from a twin-fluid atomizing nozzle (38), and then passes through the combustion air flowing hole to be introduced into the combustion space. In addition, a combustion air supply/storage/delay first cylinder (16) and a stagnation preventing second cylinder (17) are provided at the bottom of the plate. A throttle plate having a flowing hole opened in the center is provided in the combustion space.

Description

Burner

Technical field

The present invention relates to a kind of burner and be effectively applied to for example two-fluid spray burner, this two-fluid spray burner burning utilizes the liquid fuel of atomizing with gas atomization.

Background technology

The burning of a kind of two-fluid spray burner utilizes the liquid fuel of atomizing with gas atomization, and is used as thermal source of the modifier of fuel cell generation for example or the like.In this case, the modifier utilization is carried out the steam upgrading at the heat of the burning and gas-exhausting that the burning of two-fluid spray burner place produces to the fuel (for example methane gas or kerosene) that is used for upgrading, to produce modification gas (hydrogen-rich gas), modification gas supplies to fuel cell as the fuel that is used to generate electricity then.

Under situation about producing in order to a large amount of burning and gas-exhaustings of heating large modifier etc., conventional two-fluid spray burner adopts with two air fed mechanism of independent step.In this case, in the step 1, mix with the air of supplying with from air supply source from the liquid fuel such as kerosene of two-fluid spray burner nozzle ejection, and burnt.In the step 2, air is fed into the burning and gas-exhausting that is produced by the burning the step 1 from another air supply source.The position of supplying with this air is different from air fed position in the first step, produces a large amount of burning and gas-exhaustings whereby.

Patent documentation 1: the Japan Patent spy opens 2002-224592 number

Summary of the invention

The technical problem that solves

Yet, in aforementioned conventional two-fluid spray burner, except supplying with in step 1 air be used to burn, in the step 2 at diverse location air supply once more.Therefore, it is very complicated that gas-supplying structure becomes, and plant bulk has generally speaking increased.If a large amount of burning and gas-exhaustings are tending towards by supply with a large amount of air in single step, but not supply with twice air separately and produce in step 1 and step 2, a large amount of air sub-cooled flames of then being supplied with make the vaporization rate of liquid fuel reduce whereby or make the reaction speed of fuel and oxygen slow down.This can make that flame is elongated and produce unburned gas usually and unburned liquid fuel (smog), thereby cause accident to be caught fire.

In view of afore-mentioned, the purpose of this invention is to provide a kind of burner such as two-fluid spray burner, this burner can utilize simple structure to produce a large amount of burning and gas-exhaustings, and can not produce unburned gas and cause accident to be caught fire, the flame and the uniform burning and gas-exhausting of flow distribution of shortening can also be provided in addition.

Technical scheme

For the burner of first invention that solves foregoing problems be with fuel below the fuel nozzle of fuel injector is ejected into fuel nozzle the combustion space portion that is used to burn and the burner of this fuel that burns, this burner is characterised in that and comprises:

Tubular combustion air passage, it is formed on fuel injector and centers between the burner urceolus of this fuel injector periphery;

Baffle plate, it separates combustion air passage and combustion space portion; And

Be arranged at the combustion air access opening of the periphery of baffle plate, 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, flows through the combustion air access opening then and enter combustion space portion.

The burner of second invention is the burner of first invention, 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 provided in the different tubular combustion air passage of formation between exntension tubs and the burner urceolus, and this different combustion air passage leads to the combustion air access opening, and

Combustion air through the combustion air access opening flows down along different combustion air passages, and the lower end from different combustion air passages flows into combustion space portion subsequently.

The burner of the 3rd invention is the burner of second invention, it is characterized in that

It is inner to extend downwards from the bottom surface of baffle plate, be used to prevent that the one or more tubes that remain in a standstill are arranged on the tube that is used for the delay in supply combustion air.

The burner of the 4th invention is any burner in first to the 3rd invention, it is characterized in that baffle plate has a plurality of other combustion air access openings, and these holes are formed on the position than the more close center of above-mentioned combustion air access opening.

The two-fluid spray burner of the 5th invention is any two-fluid spray burner in first to the 4th invention, it is characterized in that

Fuel injector is from the fuel nozzle injecting LPG in liquefied condition,

The tubular fuel gas passage is formed on around between the gaseous fuel supply pipe and fuel injector of the periphery of fuel injector, and

Gaseous fuel flows down along fuel gas passage, and is injected into combustion space portion from the lower end of fuel gas passage and is burnt.

The two-fluid spray burner of the 6th invention is any two-fluid spray burner in first to the 5th invention, it is characterized in that

The choke block that has access opening at middle body is arranged in the portion of combustion space, and

The combustion air that flows down along combustion space portion causes the middle body of combustion space portion by choke block, passes through the access opening of choke block then.

The burner of the 7th invention is the burner of the 6th invention, it is characterized in that

Swirl vane is arranged on the choke block top, and

Flowing of combustion air through the choke block access opening forms eddy current by swirl vane.

The burner of the 8th invention is the burner of the 6th or the 7th invention, it is characterized in that

The porous plate that its middle body has an access opening is arranged on the choke block top in the portion of combustion space, and

The a part of combustion air that flows down along combustion space portion by porous plate cause combustion space portion middle body and through the access opening of porous plate.

When the burner of any was two-fluid spray burner in aforementioned first to the 8th invention, this two-fluid spray burner can have any in the structure as described below.

Specifically, according to first structure, the burner of any is a two-fluid spray burner in first to the 8th invention, and it utilizes atomizing to make liquid fuel atomization and the atomized liquid fuel that burns with gas, and this two-fluid spray burner is characterised in that and comprises:

Liquid fuel tank, it has: tubular sidepiece and the bottom that is arranged on this sidepiece lower end, liquid fuel tank stores the liquid fuel of supplying with from the liquid fuel supply pipe, and discharge the liquid fuel of being stored from one or more liquid fuel taps, open in this sidepiece or bottom the position of these one or more liquid fuel taps liquid level of storage of liquids fuel being lower than, and it is characterized 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 structure is the two-fluid spray burner of first structure, it is characterized in that

The liquid fuel tap is opened in the bottom of liquid fuel tank, and this burner further comprises:

Tubular atomizing gas passage, it is formed on the sidepiece of liquid fuel tank and centers between the urceolus of periphery of this sidepiece; And

Second fluid nozzle, it is arranged at the lower end of urceolus, and comprises nozzle body and last atomizing gas introduction part down, and this second fluid nozzle has:

Two fluids interflow spatial portion, it is formed on below the liquid fuel tap in the middle body with the gas introduction part at nozzle body and atomizing;

One or more spray holes, it is formed in the nozzle body, and these spray holes are led to two fluids interflow spatial portion; And

One or more grooves, it is formed on atomizing with in the gas introduction part, and these grooves make two fluids interflow spatial portion and atomizing communicate with each other with gas passage, and this burner is characterised in that

Liquid fuel tank is installed in atomizing with on the gas introduction part, and

Discharge and flow into the liquid fuel of two fluids interflow spatial portion and flow down with gas passage from the liquid fuel tap along atomizing, and flow through atomizing is introduced into two fluids interflow spatial portion with the groove at gas introduction part place atomizing and collaborate at two fluids interflow spatial portion with gas, then, this liquid fuel is together injected from described one or more spray holes with gas with atomizing.

The two-fluid spray burner of the 3rd structure is the two-fluid spray burner of second structure, wherein

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 structure is the two-fluid spray burner of first structure, it is characterized in that

Described one or more liquid fuel tap is opened in the bottom of liquid fuel tank,

This burner is characterised in that also and comprises:

Tubular atomizing gas passage, it is formed on the sidepiece of liquid fuel tank and centers between the urceolus of periphery of this sidepiece; And

Second fluid nozzle, it is arranged on the lower end of described urceolus, and this second fluid nozzle has:

Two fluids interflow spatial portion, its liquid fuel within tap below is formed in the middle body, and

One or more spray holes, it leads to two fluids interflow spatial portion, and 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 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 these grooves make two fluids interflow spatial portion and atomizing communicate with each other with gas passage, and

Discharge and flow into the liquid fuel of two fluids interflow spatial portion is introduced into two fluids interflow spatial portion with flowing down, flow through then described one or more grooves of liquid fuel tank bottom along atomizing with gas passage atomizing and collaborate at two fluids interflow spatial portion from the liquid fuel tap with gas, then, this liquid fuel is together injected from described one or more spray holes with gas with atomizing.

The two-fluid spray burner of the 5th structure is any two-fluid spray burner in second to the 4th structure, wherein

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 groove of gas introduction part or liquid fuel tank bottom spatial portion circumference tangential direction and form.

The two-fluid spray burner of the 6th structure is any two-fluid spray burner in second to the 4th structure, it is characterized in that

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 structure is the two-fluid spray burner of the 5th or the 6th structure, it is characterized in that atomizing is formed on around the rotational symmetric position of central axis of two fluids interflow spatial portion with described a plurality of grooves of gas introduction part or described a plurality of grooves of liquid fuel tank bottom.

The two-fluid spray burner of the 8th structure is any two-fluid spray burner in second to the 7th structure, also comprises:

Liquid fuel tank to the pressing element that presses down, be is characterized in that

The bottom of liquid fuel tank is pressed on the atomizing air introduction part of second fluid nozzle, thereby firmly contacts with its realization, perhaps

The bottom of liquid fuel tank is pressed on the second fluid nozzle, thereby firmly contacts with its realization.

The two-fluid spray burner of the 9th structure is the two-fluid spray burner of first structure, wherein

The liquid fuel tap is opened in the bottom of liquid fuel tank, and this burner also comprises:

First tubular atomizing gas passage, it is formed on the sidepiece of liquid fuel tank and centers between the urceolus of periphery of this sidepiece; And

Second fluid nozzle, it is arranged on the lower end of described urceolus, and this second fluid nozzle has:

Two fluids interflow spatial portion, it is formed in the middle body below described one or more liquid fuel taps; And

One or more spray holes, it leads to two fluids interflow spatial portion, and this burner is characterised in that

The end face of second fluid nozzle forms the taper surface part of taper,

The bottom surface of liquid fuel tank bottom forms the taper surface part of taper,

A plurality of supports are arranged on above the sidepiece of liquid fuel tank in the prominent mode of establishing, and the bottom surface of each 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 along first atomizing with gas passage flow down, through the atomizing between the support with gas passage portion, flow through second atomizing is introduced into two fluids interflow spatial portion with gas passage atomizing then and use gas to collaborate the space to collaborate at two fluids, then, this liquid fuel is together injected from spray holes with gas with atomizing.

The two-fluid spray burner of the tenth structure is any two-fluid spray burner in second to the 9th structure, it is characterized in that

Two fluids interflow spatial portion is the turbination shape, and spray holes is formed on the place, summit in this turbination space.

The two-fluid spray burner of the 11 structure is any two-fluid spray burner in first to the tenth structure, it is characterized in that

The end of liquid fuel supply pipe contacts with the inner peripheral surface of liquid fuel tank sidepiece.

Beneficial effect

According to the two-fluid spray burner of first invention, the combustion air that flows down along the combustion air passage stopped by baffle plate, and be introduced into baffle plate periphery and away from fuel nozzle.Then, combustion air passes through the combustion air access opening and flows into combustion space portion.Therefore, in the portion of combustion space, be a part of combustion air and the fuel mix that ejects from fuel nozzle, and be used to combustion fuel, and remaining combustion air further flows downward and mix with burning and gas-exhausting by the burning generation.Whereby, can realize the appropriateness mixing of combustion air and fuel and produce a large amount of burning and gas-exhaustings by the supply (step) of primary combustion with air, and can sub-cooled flame.Thereby it is possible that feasible burner such as two-fluid spray burner can utilize simple structure to produce a large amount of burning and gas-exhaustings and can not produce unburned gas and cause accident to be caught fire.

In addition, make combustion air flow into combustion space portion by baffle plate in position away from fuel nozzle.Therefore, the position that can a part of combustion air be fed into 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.

Two-fluid spray burner according to second invention, the tube that is used for the delay in supply combustion air is extended downwards in setting from the baffle plate bottom surface, and the different tubular combustion air passage that leads to the combustion air access opening is formed between these exntension tubs and the burner urceolus.Therefore, make the combustion air that flows through the combustion air access opening flow down along different combustion air passages, the lower end from different combustion air passages flows into combustion space portion then.Thus, 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 invention, 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 invention is set, the position that can a part of combustion air be supplied to liquid fuel 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, based on this viewpoint, 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 inventing, 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.

Two-fluid spray burner according to the 4th invention, described one or more different combustion air hole is formed on more inside near on the position at center than described one or more combustion airs hole, so that a part of combustion air flows through these other combustion air hole.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 to the bottom surface of baffle plate.In addition, the combustion air of low temperature via different combustion air orifice flows near fuel nozzle.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.

Two-fluid spray burner according to the 5th invention, this two-fluid spray burner comprises from the fuel injector of fuel nozzle injecting LPG in liquefied condition, and is formed on around the gaseous fuel supply pipe of the periphery of fuel injector and the tubular fuel gas passage between the fuel injector.Gaseous fuel flows down along fuel gas passage, is sprayed into combustion space portion from the lower end of fuel gas passage then and is burnt.Therefore, the gaseous fuel that ejects from the tubular fuel gas passage upwards is uniform in week.Thus, it is possible improving combustion characteristics, realizes the flame stabilization effect by gaseous fuel whereby for example with low discharge feed fluid fuel the time.

Two-fluid spray burner according to the 6th invention, the choke block that has access opening at middle body is arranged in the portion of combustion space, in order to allow introducing the middle body of combustion space portion by choke block along the combustion air that combustion space portion flows down, and allow its access opening through this choke block, promote the mixing of combustion air and unburned gas whereby.Therefore, promote the burning of unburned gas to make fuel completing combustion also can shorten flame.In addition, the fluid such as combustion air is once by the access opening throttling of choke block, thereby the flow distribution of fluid upwards is uniform in week.Therefore, it is possible utilizing the uniform burning and gas-exhausting that makes progress in week to add hot melting furnace or the like.

According to the burner of the 7th invention, swirl vane is arranged on choke block top, in order to will be through the mobile eddy current that forms of the combustion air of choke block access opening.Therefore, the combustion air through the choke block access opening forms eddy current and diffusion in the horizontal direction.Thus, the position of pressure below access opening of the combustion air middle body that flows is minimized, and produces combustion air circulating from the outside to the middle body whereby.Whereby, further promote the mixing of combustion air and unburned gas, thereby further promote the burning of unburned gas.Thereby fuel more can completing combustion, and flame further shortens.

Burner according to the 8th invention, above each porous plate that middle body has an access opening is arranged on choke block in the portion of combustion space, thereby introduce the middle body of combustion space portion by porous plate, and the access opening of this porous plate of process along a part of combustion air that combustion space portion flows down.Whereby, further promote the mixing of combustion air and unburned gas, and further promote the burning of unburned gas.Thereby fuel more can completing combustion, and flame further shortens.

Two-fluid spray burner according to first structure, two-fluid spray burner is provided with liquid fuel tank, this liquid fuel tank has: tubular sidepiece and the bottom that is arranged on this sidepiece lower end, liquid fuel tank stores the liquid fuel of supplying with from the liquid fuel supply pipe, and via the stored liquid fuel of described one or more liquid fuel taps discharges, described one or more liquid fuel taps are opened in the position that is lower than stored liquid fuel liquid level in sidepiece or bottom.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, promptly convenient liquid fuel also can be discharged the liquid fuel that is stored in the liquid fuel tank from the liquid fuel tap of liquid fuel tank continuously intermittently when the liquid fuel supply pipe is fed into liquid fuel tank.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, be stored in the also just fluctuation a little up and down of liquid fuel liquid level in the liquid fuel tank, and cause fluctuating slightly from the liquid fuel flow that the liquid fuel tap is discharged.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 structure, 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 introduced 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, liquid fuel fully mixes at the atomizing air that the groove place of two fluids interflow spatial portion increases (horizontal velocity component increase) with flow velocity, 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 the fluid combustion characteristic whereby.

According to the two-fluid spray burner of the 3rd structure, 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 structure, 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 introduced 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, 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 the fluid combustion characteristic 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 structure, 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 circumference 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 structure, 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 structure, 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 structure, two-fluid spray burner is provided with liquid fuel tank to the pressing element that presses down.Thus, the bottom of liquid fuel tank is pressed on the atomizing of second fluid nozzle with firmly contacting with its realization on the gas introduction part, and perhaps the bottom of liquid fuel tank is pressed on the second fluid nozzle and firmly contacts with its realization.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 part that the gas introduction part is used in the taper surface part of liquid fuel tank and atomizing, 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, preventing to atomize flows into position except groove with gas, and the wide jeting effect of giving full play to groove is possible.

Two-fluid spray burner according to the 9th structure, 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, through the atomizing between the support with gas passage, then flow through second atomizing is introduced 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 described one or more spray holes with gas.Therefore, liquid fuel mixes with gas with atomizing at two fluids interflow spatial portion, and is ejected from the spray holes of second fluid nozzle subsequently.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 the fluid combustion characteristic whereby.

According to the two-fluid spray burner of the tenth structure, two fluids interflow spatial portion is the turbination shape, and spray holes is formed at the place, summit of turbination spatial portion.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.

Two-fluid spray burner according to the 11 structure, 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.

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 O-O intercepting of Figure 11.

Figure 13 (a) shows the liquid fuel supply tube end view of draining liquid fuel intermittently from conventional two-fluid spray burner, and Figure 13 (b) shows the view that fluctuates widely of institute's feed fluid flow fuel in the conventional two-fluid spray burner.

Figure 14 (a) shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 8, and Figure 14 (b) is the transverse sectional view along the line P-P intercepting of 14 (a).

Figure 15 shows the curve map of the relation between the best position of ratio (L/D) and choke block, (L) is the spray holes of two fluid spray devices and the distance between the choke block, and (D) is the diameter of combustion space portion.

Figure 16 (a) shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 9; And Figure 16 (b) is the transverse sectional view along the line Q-Q intercepting of Figure 16 (a); And Figure 16 (c) is that it shows another topology example of swirl vane corresponding to the transverse sectional view of figure (b).

Figure 17 (a) shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 10; And Figure 17 (b) is the transverse sectional view along the line R-R intercepting of Figure 17 (a).

Figure 18 is the system schematic that schematically shows according to the fuel cell generation of the embodiment of the invention 11.

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, 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 (groove); 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 passage; 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 121, choke block; 122, access opening; 123, flame; 124, swirl vane; 125, porous plate; 126, hole; 127, access opening

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 at around the two fluid spray devices 12, and combustion air feed path 15 is formed at 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.The bottom surface of plate 18 is 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 small liquid fuel tap 22 is opened in the bottom of liquid fuel tank 19 21 centre.Liquid fuel tap 22 is arranged in the position lower than the liquid level 23 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 at 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 the small spray holes 44 of opening in this center (vertex position 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.Be screwed to the threaded portion 32 on the inner peripheral surface of 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 by being formed at threaded portion 33 on the outer peripheral face that covers 31 bottom 31A.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 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 introduced 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 introduced 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＜L1tan 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 first 16 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 as shown in figure 13.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 introduced 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 at 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 on 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 at 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 introduced 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, realization can utilize simple structure to produce a large amount of burning and gas-exhaustings and can not cause producing unburned gas and the unexpected two-fluid spray burner that catches fire 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 communicates with combustion air hole 52 is formed between first 16 and the burner urceolus 48.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 be used to prevent to remain in a standstill second 17 be 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 at 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 introduced 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 the foregoing description 1 (Fig. 4).The structure of the two-fluid spray burner 11 of the embodiment 2 except two fluid spray devices is identical with the structure of the two-fluid spray burner 11 of embodiment 1 (Fig. 1 is to Fig. 3).

According to the two-fluid spray burner 11 of embodiment 2, can realize following operability effect, in addition, can obtain and previous embodiment 1 identical operations effect.

Specifically, two-fluid spray burner 11 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 at 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 on 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 at 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 at the rotational symmetric position of central axis (along circumferentially equidistantly) around two fluids interflow spatial portion 43.The groove that is formed at 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 the foregoing description 1 (Fig. 4).The structure of the two-fluid spray burner 11 of the embodiment 3 except two fluid spray devices is identical with the structure of the two-fluid spray burner 11 of embodiment 1 (Fig. 1 is to Fig. 3).

According to the two-fluid spray burner 11 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 11 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 on 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 integral body are formed at 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 on 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 at the center (vertex position in turbination space 43) of two fluids interflow spatial portion 43 and communicates 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 at 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 at 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 introduced 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 the foregoing description 1 (Fig. 4).The structure of the two-fluid spray burner 11 of the embodiment 4 except two fluid spray devices is identical with the structure of the two-fluid spray burner 11 of embodiment 1 (Fig. 1 is to Fig. 3).

According to the two-fluid spray burner 11 of embodiment 4, can realize following operability effect, in addition, can obtain and previous embodiment 1 identical operations effect.

Two-fluid spray burner 11 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 introduced 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 at 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 11 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 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 formed at the lower end (can by fixing independent bodies such as welding) of sprayer urceolus 27 with sprayer urceolus 27 integral body.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 on 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 at the center (vertex position in turbination space 43) of two fluids interflow spatial portion 43 and communicates 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 at 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 at 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 introduced 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 the foregoing description 1 (Fig. 4).The structure of the two-fluid spray burner 11 of the embodiment 5 except two fluid spray devices is identical with the structure of the two-fluid spray burner 11 of embodiment 1 (Fig. 1 is to Fig. 3).

According to the two-fluid spray burner 11 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 11 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 introduced 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 at 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 11 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 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 N-N 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 formed at the lower end (can by fixing independent bodies such as welding) of sprayer urceolus 27 with sprayer urceolus 27 integral body.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 the prominent mode of establishing.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 at 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 communicates 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 introduced 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 the foregoing description 1 (Fig. 4).The structure of the two-fluid spray burner 11 of the embodiment 6 except two fluid spray devices is identical with the structure of the two-fluid spray burner 11 of embodiment 1 (Fig. 1 is to Fig. 3).

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 introduced 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 O-O intercepting of Figure 11.

As Figure 11 and shown in Figure 12, in the two-fluid spray burner 11 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 with the structure of the other parts of the two-fluid spray burner 11 of embodiment 1 (Fig. 1 is to Fig. 3).

According to the two-fluid spray burner 11 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 11 of embodiment 7, by a plurality of additional combustion are formed at 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 14 (a) shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 8, and Figure 14 (b) is the transverse sectional view along the line P-P intercepting of 14 (a); Figure 15 shows the curve map of the relation between the best position of ratio (L/D) and choke block.Here, (L) be the spray holes of two fluid spray devices and the distance between the choke block, and (D) be the diameter of combustion space portion.

Shown in Figure 14 (a) and Figure 14 (b), be provided with choke block 121 in the combustion space portion 13 of the two-fluid spray burner 11 of embodiment 8 in burner urceolus 48.Choke block 121 has out in the annular channel hole of its middle body (throttle orifice) 122.Choke block 121 the lower horizontal of plate 18, first tin 16 etc. be placed in the lower end of the burner urceolus 48 of extension, and be fixed to the inner surface of burner urceolus 48 by the fixing means such as welding.Shown in Figure 14 (b), the access opening 122 of choke block 121 is arranged in the middle body of the combustion space portion 13 of vertical view.

Therefore, shown in the arrow among Figure 14 (a), introduce the middle body of combustion space portion 13 by choke block 121 along the combustion air 50 that combustion space portion 13 flows down, thus the access opening 122 of process choke block 121.Choke block 121 not necessarily is limited to the level board of being indicated by the solid line of Figure 14 (a), and can be by the virtual hang plate of indicating (plate of falling the conical butt) of the chain-dotted line among Figure 14 (a).

The structure of the other parts of the two-fluid spray burner 11 of Figure 14 is identical with the structure of the other parts of the two-fluid spray burner 11 of the foregoing description 1 (Fig. 1 is to Fig. 3).

According to the two-fluid spray burner 11 of embodiment 8, obtain with the same operation effect of the foregoing description 1 and also to obtain following operability effect be possible.

Specifically, two-fluid spray burner 11 according to embodiment 8, the choke block 121 that partly has access opening 122 in the central is provided for combustion space portion 13, so that will introduce the middle body of combustion space portion 13 along the combustion air 50 that combustion space portion 13 flows down, and make its access opening 122 through choke block 121.Therefore, promote the mixing of combustion air 50 and unburned gas (heat and vaporize, but also unburned spraying liquid fuel), thereby further promote the burning of unburned gas.Whereby, realize that the completing combustion of fuel and the shortening of flame 123 are possible.

Particularly, the combustion air 50 (be not provided with under first 16 the situation, flowing through combustion air access opening 52 and flow into the combustion air 50 of combustion space portion 13) that flows down, then flows into from the lower end of combustion air passage 53 combustion space portion 13 along combustion air passage 53 flows down and towards the middle body diffusion of combustion space portion 13 and mix in order to this unburned gas that burns with unburned gas along combustion space portion 13.Yet not all combustion air 50 all can arrive the middle body of combustion space portion 13, and a part of combustion air 50 does not mix with unburned gas and further flows downward.Be not provided with in combustion space portion 13 under the situation of choke block 12, combustion air 50 and unburned gas mix postpones, and fuel is tending towards still unburned (unburned gas), thereby makes that flame 123 is elongated.

On the other hand, be provided with in combustion space portion 13 under the situation of aforesaid choke block 121, the combustion air 50 that flows downward is stopped by choke block 121 and is introduced into access opening 122 (the perhaps middle body of combustion space portion 13) in the middle body.Whereby, promote the mixing of combustion air 50 and unburned gas, and promote the burning of unburned gas.Thereby, be easy to realize the completing combustion of fuel, so that reduce CO and shorten flame 123.

In addition, according to the two-fluid spray burner 11 of embodiment 8, the fluid such as combustion air makes whereby that once by access opening 122 throttlings of choke block 121 flow distribution of fluid is upwards even in week.Therefore, it is possible utilizing the uniform burning and gas-exhausting that makes progress in week to add hot melting furnace or the like.

It is desirable that the scope of L/D is set at 2 to 10 (in the area I of Figure 15).Here, as shown in figure 14, L is the spray holes 44 of two fluid spray devices 12 and the distance between the choke block 121, and D is the internal diameter (diameter of combustion space portion 13) of burner urceolus 48.As L/D during, supply with a large amount of relatively air immediately and cool off flame less than 2 (the area I I of Figure 15).Therefore, carburretion may be littler, and produce drop may be bigger.On the other hand, as L/D during greater than 10 (the area I II of Figure 15), air feed is postponed, and the increase of the ratio of the air that mixes with the low temperature unburned gas.Thereby the burning that is difficult to promote unburned gas is (with airborne O ₂Reaction).

Be under the situation of diameter of access opening of choke block 121 at d, with the scope of d/D be set at 0.2 to 0.6 with interior be desirable, as shown in figure 14.When d/D less than 0.2 the time, the pressure of combustion space portion 12 greatly raises.When d/D greater than 0.6 the time, the effect that air and unburned gas are mixed reduces.

＜embodiment 9 〉

Figure 16 (a) shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 9; And Figure 16 (b) is the transverse sectional view along the line Q-Q intercepting of Figure 16 (a); And Figure 16 (c) is that it shows another topology example of swirl vane corresponding to the transverse sectional view of figure (b).

To shown in Figure 16 (c), the two-fluid spray burner 11 of embodiment 9 comprises the swirl vane 124 of choke block 121 tops as Figure 16 (a).A plurality of swirl vanes 124 (6 blades) in week of access opening 122 upwards with the access opening 122 that is set in qually spaced in choke block 12 around, and be fixed to the upper surface of choke block 121 and the inner surface of burner urceolus 48 by the fixing means such as welding.Each swirl vane 124 basically the hole, circular passage 122 in the vertical view tangential direction and be provided with.Therefore, flowing of the combustion air 50 of the access opening 122 of process choke block 121 forms eddy current by swirl vane 124, indicates as the arrow among figure (b) and the figure (c).

The direction that swirl vane 124 extends in vertical view is subject to the tangential direction of access opening 122.124 needs of each swirl vane make its side radial skew with respect to access opening 122 in plane.Swirl vane 124 can be the tabular shown in Figure 16 (b), or the bending shown in Figure 16 (c).

The structure of the other parts of the two-fluid spray burner 11 of Figure 16 is identical with the structure of the other parts of the two-fluid spray burner 11 of embodiment 1 and embodiment 8 (Fig. 1 is to Fig. 3, Figure 14) as mentioned above.

According to the two-fluid spray burner 11 of embodiment 9, obtain and previous embodiment 1 and embodiment 8 identical operations effects, and further to obtain following operability effect be possible.

Specifically, according to the two-fluid spray burner 11 of embodiment 9, swirl vane 124 is arranged on the top of choke block 121, thereby forms eddy current by the swirl vane 124 feasible combustion airs 50 that pass through the access opening 122 of choke blocks 121.Therefore, the combustion air 50 of the access opening 122 of process choke block 121 forms eddy current and diffusion flatly as the arrow of Figure 16 (a) is indicated.Thus, the pressure of the middle body when combustion air 50 flows is minimized below access opening 122, produces combustion air 50 circulating from the outside to the middle body whereby, and its direction is shown in the arrow of Figure 16 (a).Whereby, further promote the mixing of combustion air 50 and unburned gas, and further promote the burning of unburned gas.Thereby fuel more can completing combustion, and flame 123 further shortens.

＜embodiment 10 〉

Figure 17 (a) shows the longitudinal cross-section view according to the structure of the two-fluid spray burner of the embodiment of the invention 10; And Figure 17 (b) is the transverse sectional view along the line R-R intercepting of Figure 17 (a).

Shown in Figure 17 (a) and Figure 17 (b), the two-fluid spray burner 11 of embodiment 10 comprises a plurality of porous plates 125 (in the accompanying drawing example being 2) in the combustion space portion 13.The quantity of porous plate 125 is not limited to a plurality of, and can be one.Porous plate 125 is positioned at the top of choke block 121, that is, and and between plate 18 (first 16) and the choke block 121.

Porous plate 125 is an annular plate, and it has out the relatively large diameter channels hole 127 in middle body and opens in middle body relative smaller diameter bore 126 on every side.Porous plate 125 horizontal settings are in combustion space portion 13 inside, and are fixed to the inner surface of burner urceolus 48 by the fixing means such as welding.Shown in Figure 17 (b), the access opening 127 of porous plate 125 is positioned at the central portion office of combustion space portion 13 in plane.

Therefore, introduce the access opening 127 (the perhaps middle body of combustion space portion 13) of central portion office by porous plate 125 along a part of combustion air 50 that combustion space portion 13 flows down, thereby through passage 127, and other combustion air 50 is downward through hole 126.For example, in porous plate 125 on the porous plate place, 20% of the combustion air 50 that flows downward towards porous plate 125 is introduced into middle body, and this combustion air 80% through via hole 126, and further flow downward.Following porous plate place in porous plate 125,40% of the combustion air 50 that flows downward towards porous plate 125 is introduced into middle body, and this combustion air 60% through via hole 126, and further flow downward.

The structure of the other parts of the two-fluid spray burner 11 of Figure 17 is identical with the structure of the other parts of the two-fluid spray burner 11 of embodiment 1, embodiment 8 and embodiment 9 (Fig. 1 is to Fig. 3, Figure 14) as mentioned above.

According to the two-fluid spray burner 11 of embodiment 10, obtain and previous embodiment 1, embodiment 8 and embodiment 9 identical operations effects, and further to obtain following operability effect be possible.

Specifically, two-fluid spray burner 11 according to embodiment 10, have above each porous plate 125 that middle body has an access opening 127 is arranged on choke block 121 in the combustion space portion 13, so that will introduce the middle body of combustion space portion 13 along a part of combustion air 50 that combustion space portion 13 flows down by porous plate 125, and make its access opening 127 through porous plate 125.Whereby, further promote the mixing of combustion air 50 and unburned gas, and further promote the burning of unburned gas.Whereby, be easy to realize the completing combustion of fuel, thereby further shorten flame 123.

＜embodiment 11 〉

Figure 18 is the system schematic that schematically shows according to the fuel cell generation of the embodiment of the invention 11.Figure 18 shows any two-fluid spray burner 11 in the previous embodiment 1 to 10 as the example under the thermal source situation of the modifier in the fuel cell generation.

As shown in figure 18, 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 10.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 11, the thermal source of modifier 111 is any in the two-fluid spray burner 11 of previous embodiment 1 to 10.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 taps 22.

With 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 conical butt, 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 burner, and be effectively applied to for example require to produce a large amount of burnings Exhaust comes the situation of modifier of heating large fuel cell generation etc.

Claims (8)

1. burner, described burner is ejected into the combustion space portion that is used to burn under the described fuel nozzle and the described fuel that burns with fuel from the fuel nozzle of fuel injector, and described burner is characterised in that and comprises:

Tubular combustion air passage, described tubular combustion air passage are formed on described fuel injector and around between the burner urceolus of the periphery of described fuel injector;

Baffle plate, described baffle plate are with described combustion air passage and described combustion space portion separately; And

The combustion air access opening, described combustion air access opening is arranged at the periphery of described baffle plate, it is characterized in that

The combustion air that flows down along described combustion air passage stopped by described baffle plate, and is fed to the periphery of described baffle plate and away from described fuel nozzle, flows through described combustion air access opening then and enter described combustion space portion.

2. burner according to claim 1 is characterized in that

The tube that is used for the delay in supply combustion air that extends downwards from the bottom surface of described baffle plate is provided between the tube of extension and the described burner urceolus and forms different tubular combustion air passages, described different tubular combustion air passage leads to described combustion air access opening, and

Flow down along described different combustion air passage through the combustion air of described combustion air access opening, flow into described combustion space portion from the lower end of described different combustion air passage.

3. burner according to claim 2 is characterized in that

In being used for the described tube of delay in supply combustion air, be provided with one or more that being used to of extending from the bottom surface of described baffle plate prevent to remain in a standstill downwards.

4. according to each described burner in the claim 1 to 3, it is characterized in that described baffle plate comprises that residing position is than inside a plurality of other combustion air access openings near the center of described combustion air access opening.

5. according to each described burner in the claim 1 to 4, it is characterized in that

Described fuel injector is from described fuel nozzle injecting LPG in liquefied condition,

The tubular fuel gas passage is formed on around between the gaseous fuel supply pipe and described fuel injector of the periphery of described fuel injector, and

Gaseous fuel flows down and is injected into described combustion space portion from the lower end of described fuel gas passage and burns along described fuel gas passage.

6. according to each described burner in the claim 1 to 5, it is characterized in that

Choke block is set is used for described combustion space portion, described choke block has access opening in middle body, and

The combustion air that flows down along described combustion space portion is directed into the middle body of described combustion space portion by described choke block, passes through the access opening of described choke block then.

7. burner according to claim 6 is characterized in that

Above described choke block, swirl vane is set, and

The combustion air of the access opening of the described choke block of process forms eddy current by described swirl vane and flows.

8. according to claim 6 or 7 described burners, it is characterized in that

In the portion of described combustion space porous plate is set above choke block, described porous plate has access opening in middle body, and

The part of the combustion air that flows down along described combustion space portion by described porous plate be directed into described combustion space portion middle body and through the access opening of described porous plate.

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