CN101883951A - Boiler structure for vessel - Google Patents
Boiler structure for vessel Download PDFInfo
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- CN101883951A CN101883951A CN2008801189136A CN200880118913A CN101883951A CN 101883951 A CN101883951 A CN 101883951A CN 2008801189136 A CN2008801189136 A CN 2008801189136A CN 200880118913 A CN200880118913 A CN 200880118913A CN 101883951 A CN101883951 A CN 101883951A
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- Prior art keywords
- burner
- superheater
- air
- vessel
- sidepiece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
- F23L9/04—Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air beyond the fire, i.e. nearer the smoke outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
- F22B21/04—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely
- F22B21/08—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends
- F22B21/081—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends involving a combustion chamber, placed at the side and built-up from water tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/04—Controlling superheat temperature by regulating flue gas flow, e.g. by proportioning or diverting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/24—Disposition of burners to obtain a loop flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
- F23C7/04—Disposition of air supply not passing through burner to obtain maximum heat transfer to wall of combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L99/00—Subject matter not provided for in other groups of this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
A boiler structure for vessel in which partial progress of corrosion is improved by making temperature distribution of combustion gas passing through a superheater uniform and the NOx level of combustion gas can be reduced. In the boiler structure for vessel configured such that the combustion gas generated through combustion of a burner (3) flows from a fire furnace (2) through a superheater (5) and an evaporation pipe group (6), a bottom air port (20) for supplying a part of combustion air from the bottom (2a) of the furnace (2) as bottom air is provided, the bottom air port (20) is located closer to the superheater (5) side than the center line (CL) of the burner, and a blow-off direction of bottom air is set in a range inclining from vertical upward to the direction of the burner.
Description
Technical field
The present invention relates to boiler structure for vessel such as the marine boiler of a kind of lift-launch on boats and ships, heating boiler more peculiar to vessel.
Background technology
At present, carry on boats and ships marine boiler with compare at the stationary boiler of use such as power station, owing to the restriction that the space is set is big, so pay the utmost attention to cramped construction.
In existing marine boiler 1 shown in Figure 5, be provided with one or more burners 3 on the top of burner hearth 2.Burner 3 make fuel combustion and the burning gases that produce in turn by preceding bank tube (front bank tube) 4, superheater (Over Hot device) 5 and evaporation nest of tubes (back bank tube) 6 in the configuration of the downstream of burner hearth 2, carry out heat exchange with the water or other fluid that in pipe, circulates.The burning gases of finishing like this after the heat exchange are discharged from outside to marine boiler 1 by outlet side gas pipeline 7 from gas vent 8.And the symbol 9 among the figure is water drum (water De ラ system), the 10th, and steam drum (steaming mood De ラ system), 11 and 12 is collector (へ Star ダ).
In such marine boiler 1, the burning gases that produce owing to the burning by burner 3 evenly flow through superheater 5 and steam nest of tubes 6, so propose at the outlet side of evaporation nest of tubes 6 cowling panel (for example referring to Patent Document 1) to be set.
Patent documentation 1: TOHKEMY 2002-243106 communique (with reference to figure 1)
In above-mentioned existing boiler structure for vessel, owing on the gas temperature of burning gases distributes, produce imbalance, so exist the problem that corrosion concentrates on the bottom of superheater 5.
In addition, for the marine boiler 1 that burner hearth 2 is reduced based on densification, especially when burner 3 tendency superheaters 5 sides were provided with, the flame of burner 3 was oblique to superheater 5 inclinations, therefore in zone, because high temperature can promote to constitute the wall thickness reduction of the pipe of superheater 5 near the superheater 5 of this flame.
In addition, make the furnace load height owing to densification in marine boiler, the problem that exists the NOx level to uprise for example in the marine boiler 1 of special oil firing, also exists for the situation about 300～400ppm.
The imbalance of above-mentioned burning gas temperature is shown in arrow G among the figure, resulting from the captive bottom of more than half part by burner hearth 2 of burning gases flows, and the Temperature Distribution of the burning gases by superheater 5 exists the high more tendency of central temperature of superheater bottom.In addition, for the temperature of superheater 5, because also there is temperature difference in mobile steam in pipe, so the high downstream of vapor (steam) temperature, the temperature of superheater 5 is high more.
Therefore, in the superheater 5 of above-mentioned marine boiler 1, the bottom corrosion becomes big more, and then even identical bottom, the high position of vapor (steam) temperature of flowing in pipe is corroded big more.That is, in superheater 5, exist the high zone of temperature, corrode big more problem.
From this background, in boiler structure for vessel, for the carrying out (bias (り partially) that corrosion is carried out) that prevents or suppress to constitute the local corrosion that produces on the pipe of superheater, wall thickness reduction, requirement improves the Temperature Distribution in the burner hearth, and makes the temperature distribution homogenization by the burning gases of superheater.In addition, in order to tackle environmental problem in recent years, requirement can reduce the boiler structure for vessel of the NOx level that contains in the burning gases.
Summary of the invention
The present invention In view of the foregoing proposes, its purpose is to provide a kind of boiler structure for vessel, this boiler structure for vessel can make by the temperature distribution homogenization of the burning gases of superheater, can improve the bias that corrosion is carried out, and can reduce the NOx level that contains in the burning gases.
The present invention is in order to address the above problem the following means that adopt.
First mode of boiler structure for vessel of the present invention is a kind of boiler structure for vessel, and it constitutes the burning gases that the burning by burner produces and flows by superheater and evaporation nest of tubes from burner hearth, wherein,
Be provided with the bottom air mouth of the part of combustion air being supplied as bottom air from the bottom of described burner hearth, this bottom air mouth is positioned at than burner center line more by the position of described superheater one side, and the blow-off direction of described bottom air is set at the scope that tilts to described burner direction from vertical up.
First mode according to this boiler structure for vessel, be provided with the bottom air mouth of the part of combustion air being supplied as bottom air from the bottom of burner hearth, this bottom air mouth is positioned at the position of more leaning on described superheater one side than burner center line, and the blow-off direction of bottom air is set at the scope that tilts to the burner direction from vertical up, therefore, can change by the mobile flow pattern of the burning gases in the burner hearth that makes of bottom air.That is, temporarily be pushed to the direction opposite towards the mobile of burning gases of superheater owing to be subjected to flowing of bottom air, therefore, can eliminate concentrating on flowing of furnace bottom side, roughly flow into equably towards superheater with superheater from furnace bottom.In addition, dropping into such bottom air, is to adopt the secondary investing method to drop into reducing the effective combustion air of NOx in the burning gases.
At this moment, in order to take into account the densification of burner hearth, the combustion air that uses as bottom air preferably is below 30% of whole air capacities approximately.
In addition, the blow-off direction of bottom air mouth is preferably set to from vertical towards (0 degree) scope towards about burner direction 45 degree.
In addition, the quantity of bottom air mouth is by 1) be burner quantity above or 2) become continuous slit-shaped, thereby wish to guarantee that bottom air is the high flow rate about 20～100m/s.
Second mode of boiler structure for vessel of the present invention is a kind of boiler structure for vessel, and it constitutes the burning gases that the burning by burner produces and flows by superheater and evaporation nest of tubes from burner hearth, wherein,
Be provided with the sidepiece air scoop of the part of combustion air being supplied as the sidepiece air from the top of described burner hearth, this sidepiece air scoop is positioned at than burner center line more by the position of described superheater one side, and the blow-off direction of described sidepiece air be set at vertical be that benchmark is in the scope of the twocouese inclination of described superheater and described burner down.
Second mode according to this boiler structure for vessel, owing to be provided with the sidepiece air scoop of the part of combustion air being supplied as the sidepiece air from the top of burner hearth, this sidepiece air scoop is positioned at the position of more leaning on described superheater one side than burner center line, and the blow-off direction of sidepiece air be set at vertical be benchmark down in the scope that the twocouese of superheater and burner tilts, therefore, can the combustion zone in the burner hearth and the flow pattern of burning gases be changed by sidepiece air mobile.That is, can adjust the combustion zone in the burner hearth by the flow direction of sidepiece air, therefore as long as the combustion zone is moved to the direction away from superheater, flame also leaves from superheater, and the flow pattern of burning gases changes.
In addition, by the flow direction of suitable adjustment sidepiece air,, can prevent that also flame from tilting towards superheater even in the burner hearth of small-sized marine boiler.
In addition, by dropping into the sidepiece air, can adjust reducing the diffusion of the effective combustion air of NOx in the burning gases.
In addition, the input of sidepiece air is because at the top of superheater tube side formation gas curtain, so can reduce the shunting on superheater top.
At this moment, in order to take into account the densification of burner hearth, the combustion air that uses as the sidepiece air preferably is below 30% of whole air capacities approximately.
In addition, the blow-off direction of sidepiece air scoop is preferably set to: with vertical (0 degree) down is the scope (30 degree～+ 30 degree) of center towards about superheater direction and each 30 degree of burner direction.
In addition, sidepiece air scoop preferred disposition of the present invention is in the bellows identical with burner.
At this moment, for the quantity of sidepiece air scoop and dispose following 3 kinds of feasible situations: 1) quantity is identical with burner quantity and be configured in the positive next door of burner, 2) quantity than burner quantity lack one and be configured between the burner, 3) on continuous mouthful, slit is set and is configured in the positive next door of burner, the sidepiece air wishes to guarantee the high flow rate about 20～60m/s.
According to above-mentioned the present invention, in the burner hearth of marine boiler, can under bottom air or sidepiece air influence, the flow pattern of the burning gases that concentrate on furnace bottom be changed.The result is, can make the burning gas temperature homogenization of superheater inlet, eliminates or reduces existing temperature imbalance, and therefore a kind of boiler structure for vessel that has improved the bias that the corrosion that concentrates on the superheater bottom carries out can be provided.
In addition, because bottom air adopts the secondary investing method to drop into combustion air, so the input of sidepiece air can adjust the diffusion of combustion air, therefore, can form the boiler structure for vessel that has reduced the NOx grade that contains in the burning gases.
Description of drawings
Fig. 1 is the profilograph of expression first embodiment in boiler structure for vessel of the present invention;
Fig. 2 A is the major part vertical view of configuration example Fig. 1 of expression bottom air mouth;
Fig. 2 B is the major part vertical view of the variation of presentation graphs 2A;
Fig. 3 is the profilograph of expression second embodiment in boiler structure for vessel of the present invention;
Fig. 4 A is the major part vertical view of Fig. 3 of the configuration example of expression sidepiece air scoop;
Fig. 4 B is the major part vertical view of first variation of presentation graphs 4A;
Fig. 4 C is the major part vertical view of second variation of presentation graphs 4A;
Fig. 5 is the profilograph of the existing boiler structure for vessel example of expression.
Among the figure:
1A, 1B-marine boiler
The 2-burner hearth
The 3-burner
The 5-superheater
6-evaporates nest of tubes
20,20A-bottom air mouth
30,30A-sidepiece air scoop
The specific embodiment
Below based on an embodiment of description of drawings boiler structure for vessel of the present invention.
The burning gases that generated by burner 3 carry out heat exchange by the heat exchanger that is configured in burner hearth 2 downstreams.In illustrated structure, according to the arranged in order heat exchanger of preceding bank tube 4, superheater 5 and evaporation nest of tubes (back bank tube) 6, burning gases carry out heat exchange with the water or other fluid that flows and heat in the pipe of each heat exchanger.The burning gases of finishing heat exchange like this are discharged from outside to marine boiler 1 by outlet side gas pipeline 7 from gas vent 8.And the symbol 9 among the figure is water drums, the 10th, and steam drum, 11 and 12 is collectors.
＜the first embodiment 〉
Shown in Fig. 1 and Fig. 2 A, in the boiler structure for vessel of present embodiment, the burning gases that marine boiler 1A constitutes by the burning generation of burner 3 flow by superheater 5 and evaporation nest of tubes 6 from burner hearth 2, and are provided with the bottom air mouth 20 that the part of combustion air is supplied to marine boiler 1A as bottom air from the furnace bottom 2a of burner hearth 2.This bottom air mouth 20 is positioned at than the centre line C L of burner 3 more by the position of superheater 5 one sides, and then, be configured to the angular range, theta 1 that tilts to the direction of burner 3 from vertical direction up from the blow-off direction of the bottom air of bottom air mouth 20 ejections.
And above-mentioned bottom air mouth 20 is connected with the bottom air pipeline 21 of the outside that is formed on burner hearth 2, by this pipeline supply air.
For example shown in Fig. 2 A, the quantity of bottom air mouth 20 is identical with the quantity of burner 3, sets the flow velocity of bottom air ejection than the highland.That is, the position configuration bottom air mouth 20 of the positive side of burner 3 when overlooking, the high flow rate of flow velocity more than setting of keeping the bottom air of a part of using combustion air drops into air.
During the good burning in considering burner hearth 2 etc., be preferably below about 30% of combustion air integral body in this spendable bottom air amount.And, for the flow pattern (flow pattern) to burning gases described later is brought enough influences, hope be that the flow velocity of the bottom air that drops into from bottom air mouth 20 waits each condition to guarantee high flow rate about 20～100m/s corresponding to the size of burner hearth 2.
The blow-off direction of bottom air mouth 20 wish to be set at than burner 3 more by in the position of superheater 5 sides from the scope of 0 degree to about inclined to one side 45 degree of burner direction of vertical direction up.That is, angular range, theta among Fig. 11 wishes it is the scope of 0～45 degree roughly, makes it possible to push the burning gases streams (double dot dash line G in the reference diagram) that bottom air stream will concentrate on furnace bottom 2a to avoid from superheater 5 direction effectively.
In the above-mentioned boiler structure for vessel that possesses bottom air mouth 20, the flow pattern that can make the burning gases in the burner hearth 2 by flowing of bottom air changes.That is, towards the burner body of superheater 5 stream,, shown in solid arrow G1 among the figure, temporarily be pushed to the direction opposite with superheater 5 by the bottom air stream that is subjected to upwards flowing from furnace bottom 2a.Therefore, the part that flows towards furnace bottom 2a side in the burning gases stream is blocked, and turns and flow in the top in burner hearth 2, therefore, has eliminated concentrating on the existing mobile of furnace bottom 2a side, thereby has roughly flowed into equably towards superheater 5.
In other words, by dropping into above-mentioned bottom air, change the flow pattern of burning gases, will temporarily push a side opposite to from the burning gases that furnace bottom 2a flows into superheater 5, thereby be pressed into superheater 5 sides equably with superheater 5.Thus, in the superheater bottom as furnace bottom 2a side of superheater 5, promote the high-temperature gas zone of corrosion to diminish.
In addition,, can also obtain promoting mixing of combustion gases, reduce the unbalanced action effect of temperature of the inlet integral body of superheater 5 by the effect of burning gases stream with the counter current flow collision of the bottom air that upwards drops into.
So, in the burner hearth 2 of marine boiler 1A, existing temperature imbalance can be eliminated or reduce to the burning gas temperature homogenising of the porch of superheater 5 therefore.Therefore, the bias of carrying out can be improved, durability and reliability can be improved in the concentrated corrosion in the bottom of superheater 5.
In addition, owing to adopt above-mentioned bottom air to mean that secondary drops into the combustion air of burner 3, so can also reduce the NOx level that contains in the burning gases.
But, in the above-described embodiment,,, the quantity of air scoop can also be arranged to quantity more than or equal to burner in order to ensure the high flow rate of the bottom air that drops into though the quantity of bottom air mouth 20 is identical with the quantity of burner 3.In addition, the variation shown in Fig. 2 B is such, can also suitably adopt the bottom air mouth 20A of the continuous slit-shaped of the separator 22 of having packed into.
＜the second embodiment 〉
Second embodiment of boiler structure for vessel of the present invention is described based on Fig. 3, Fig. 4.Wherein, the identical symbol of part mark for same with above-mentioned embodiment omits its detailed description.
In this embodiment, with respect to marine boiler 1B, be provided with the sidepiece air scoop of the part of combustion air being supplied as the sidepiece air from the top of burner hearth 2 30.This sidepiece air scoop 30 is arranged on the inside of the bellows 3a identical with burner 3.
Above-mentioned sidepiece air scoop 30 be provided with than burner centre line C L more by superheater 5 one sides, and the blow-off direction of sidepiece air be configured to vertical be benchmark down adjustable in the angular range ± θ 2 of the twocouese inclination of superheater 5 and burner 3.That is, the θ 2 of this moment is preferably set to about 30 degree, therefore, sidepiece air scoop 30 wish to be provided with on the blow-off direction in the angular ranges of ± 30 degree tiltable guiding mechanism.
In addition, for example shown in Fig. 4 A, the quantity that sidepiece air scoop 30 is provided with in the bellows 3a identical with burner 3 is identical with the quantity of burner 3.This is to set the flow velocity of ejection high for the sidepiece air for a part of using combustion air.That is, in illustrated example, at the position configuration sidepiece air scoop 30 of the positive side of each burner 3, the high flow rate that the flow velocity of sidepiece air is kept more than the setting drops into.
In this spendable bottom air amount, below about 30% of combustion air integral body preferably during the good combustion in considering burner hearth 2 etc.And for the flow pattern to burning gases described later applies enough influences, the flow velocity of the sidepiece air that drops into from sidepiece air scoop 30 wishes that the size corresponding to burner hearth 2 waits each condition to guarantee high flow rate about 20～60m/s.
According to this structure,, the combustion zone of formation burner hearth 2 in and the flow pattern of burning gases are changed by flowing of the sidepiece air that drops into from sidepiece air scoop 30.That is, the combustion zone that forms in burner hearth 2 can be adjusted corresponding to the flow direction of the sidepiece air that drops into, and therefore for example makes the blow-off direction of sidepiece air oblique to burner 3 inclinations, and the combustion zone in the burner hearth 2 is moved to the direction away from superheater 5.
The result is, for the flame of the fuel combustion that drops into from burner 3, its also be formed at from superheater 5 away from the position.Therefore, much less flame for the flow pattern of burning gases, also can change shown in arrow G among the figure 2 to the direct influence of superheater 5 admittedly exactly like that.That is, burning gases stream forms under the sidepiece air influence temporarily to away from the flowing of the direction of superheater 5, and therefore, has improved existing the flowing of concentrating to furnace bottom 2a, becomes on whole of superheater 5 roughly and flows equably.In other words,, change the flow pattern of burning gases, can reduce temperature imbalance in the inlet generation of superheater 5 by dropping into above-mentioned sidepiece air.
In addition, the tilt angle theta 2 by making above-mentioned sidepiece air scoop 30 changes, and can suitably adjust the flow direction of sidepiece air, therefore in the burner hearth 2 of the marine boiler 1B of compactness, can prevent that flame from tilting to superheater 5.The result is, can solve the direct influence of the flame that is subjected to tilting to the direction towards the pipe of superheater 5 and promotes the problem of tube wall attenuation.
In addition,, the diffusion of combustion air can be adjusted, therefore, the NOx in the burning gases can also be reduced by dropping into the sidepiece air from above-mentioned sidepiece air scoop 30.
In addition, about the input of above-mentioned sidepiece air, can be in the pipe side of superheater 5 at the gas curtain of top formation based on the sidepiece air.The formation of such gas curtain can reduce the shunting of the burning gases that flow by superheater 5 tops.That is, can increase by superheater 5 and the combustion gas flow that carries out heat exchange, therefore the efficient for marine boiler 1B improves also effective.
But, in the above-described embodiment,,, be not limited thereto though it is identical and be configured in the mode of the positive side of burner 3 to show the number of quantity and burner 3 for the quantity and the configuration of sidepiece air scoop 30.
In first variation shown in Fig. 4 B, number is lacked one sidepiece air scoop 30 than the number of burner 3 and is configured between the adjacent burner 3,3.In addition, in second variation shown in Fig. 4 C, at continuous sidepiece air scoop 30A slit (slit) 31 is set suitably and divides, form the horizontal structure that is configured in burner 3.In these variation, guarantee that also the sidepiece air that sprays is the high flow rate about 20～60m/s.
Like this, according to above-mentioned boiler structure for vessel of the present invention, in the burner hearth 2 of marine boiler 1A, 1B, can control and make its variation to the flow pattern that concentrates on the burning gases of furnace bottom 2a owing to bottom air or sidepiece air influence.The result is, eliminates or reduces existing temperature imbalance at the inlet of superheater 5, promotes the homogenization of burning gas temperature, therefore, forms the improved boiler structure for vessel of skew that the corrosion of the pipe that concentrates on superheater 5 bottoms is carried out.
In addition, because bottom air adopts the secondary mode to drop into burning gases, and drop into the sidepiece air and can adjust the diffusion of combustion air, therefore, no matter be which kind of situation, all form the boiler structure for vessel that has reduced the NOx level that contains in the burning gases.
Promptly, boiler structure for vessel of the present invention is by changing the input method of combustion air, can control flame burning state, gas flow pattern, be reduced in the imbalance that produces on the inlet temperature of superheater 5, and can cut down NOx by drop into combustion air interimly.
In addition, the invention is not restricted to above-mentioned embodiment, for example can also be applicable to the heating boiler more peculiar to vessel that possesses again burner for heating and reheating furnace in the downstream of evaporation nest of tubes 6 etc., in the scope that does not break away from purport of the present invention, can suitably change.
Claims (3)
1. boiler structure for vessel, it constitutes the burning gases that the burning by burner produces and flows by superheater and evaporation nest of tubes from burner hearth, wherein,
Be provided with the bottom air mouth of the part of combustion air being supplied as bottom air from the bottom of described burner hearth, this bottom air mouth is positioned at than burner center line more by the position of described superheater one side, and the blow-off direction of described bottom air is set at the scope that tilts to described burner direction from vertical up.
2. boiler structure for vessel, it constitutes the burning gases that the burning by burner produces and flows by superheater and evaporation nest of tubes from burner hearth, wherein,
Be provided with the sidepiece air scoop of the part of combustion air being supplied as the sidepiece air from the top of described burner hearth, this sidepiece air scoop is positioned at than burner center line more by the position of described superheater one side, and the blow-off direction of described sidepiece air be set at vertical be that benchmark is in the scope of described superheater and the inclination of described burner twocouese down.
3. boiler structure for vessel as claimed in claim 2, wherein,
Described sidepiece air scoop is configured in the bellows identical with described burner.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-324692 | 2007-12-17 | ||
| JP2007324692A JP5022204B2 (en) | 2007-12-17 | 2007-12-17 | Marine boiler structure |
| PCT/JP2008/062570 WO2009078191A1 (en) | 2007-12-17 | 2008-07-11 | Boiler structure for vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101883951A true CN101883951A (en) | 2010-11-10 |
| CN101883951B CN101883951B (en) | 2014-04-23 |
Family
ID=40795310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880118913.6A Active CN101883951B (en) | 2007-12-17 | 2008-07-11 | Boiler structure for vessel |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20100251945A1 (en) |
| EP (1) | EP2224166A4 (en) |
| JP (1) | JP5022204B2 (en) |
| KR (2) | KR20100087365A (en) |
| CN (1) | CN101883951B (en) |
| WO (1) | WO2009078191A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5010425B2 (en) * | 2007-10-17 | 2012-08-29 | 三菱重工業株式会社 | Reheat boiler and gas temperature control method for reheat boiler |
| JP5364534B2 (en) * | 2009-10-28 | 2013-12-11 | 三菱重工業株式会社 | Marine boiler structure |
| JP5374344B2 (en) * | 2009-12-07 | 2013-12-25 | 三菱重工業株式会社 | Marine boiler structure |
| JP6549047B2 (en) * | 2016-02-02 | 2019-07-24 | 三菱重工業株式会社 | boiler |
| JP6879778B2 (en) * | 2017-02-28 | 2021-06-02 | 三菱重工マリンマシナリ株式会社 | Boilers and ships equipped with boilers and methods for producing inert gas |
| JP7292898B2 (en) * | 2019-02-22 | 2023-06-19 | 三菱重工マリンマシナリ株式会社 | boiler |
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| US3048131A (en) * | 1959-06-18 | 1962-08-07 | Babcock & Wilcox Co | Method for burning fuel |
| US3157163A (en) * | 1961-10-19 | 1964-11-17 | Riley Stoker Corp | Steam generating unit |
| US3171390A (en) * | 1962-03-26 | 1965-03-02 | Riley Stoker Corp | Steam generating unit |
| US4060376A (en) * | 1974-12-11 | 1977-11-29 | Energiagazdalkodasi Intezet | Method of firing and furnace therefor |
| JPS5390023A (en) * | 1977-01-20 | 1978-08-08 | Ishikawajima Harima Heavy Ind Co Ltd | Two-stage combustion furnace |
| US4377134A (en) * | 1981-08-03 | 1983-03-22 | Combustion Engineering, Inc. | Steam temperature control with overfire air firing |
| JPS59185907A (en) * | 1983-04-05 | 1984-10-22 | Takuma Sogo Kenkyusho:Kk | Water tube boiler of high load combustion suppressing formation of nitrogen oxides |
| JPS61170813U (en) * | 1985-04-08 | 1986-10-23 | ||
| JP2515807B2 (en) * | 1987-06-18 | 1996-07-10 | バブコツク日立株式会社 | Combustion air supply method |
| JP2529699B2 (en) * | 1987-08-04 | 1996-08-28 | 大阪瓦斯株式会社 | Low noise combustion method of boiler |
| JP2648600B2 (en) * | 1987-11-13 | 1997-09-03 | バブコツク日立株式会社 | Solid fuel combustion method |
| JPH0462309A (en) * | 1990-06-29 | 1992-02-27 | Ebara Corp | Low noise combustion method by two-step combustion of burner |
| KR100676163B1 (en) * | 1999-08-02 | 2007-01-31 | 가부시키카이샤 미우라겐큐우쇼 | Water-Tube Boiler |
| JP3553495B2 (en) * | 2000-12-26 | 2004-08-11 | 三菱重工業株式会社 | Boiler equipment |
| JP2002243106A (en) * | 2001-02-21 | 2002-08-28 | Mitsubishi Heavy Ind Ltd | Boiler |
| JP4443781B2 (en) * | 2001-02-28 | 2010-03-31 | 三菱重工業株式会社 | Combustion gas / short path prevention structure |
| JP2004197970A (en) * | 2002-12-16 | 2004-07-15 | Miura Co Ltd | Low-nox combustion method, and device thereof |
| US7004086B2 (en) * | 2004-06-17 | 2006-02-28 | General Electric Company | Injection of overfire air through the upper furnace arch for penetration and mixing with flue gas |
| JP4062309B2 (en) * | 2005-02-03 | 2008-03-19 | トヨタ自動車株式会社 | Control device for internal combustion engine |
| JP2007101035A (en) * | 2005-10-03 | 2007-04-19 | Kyushu Olympia Kogyo Kk | Burner for liquid fuel of boiler with exhaustion port along center axis of furnace |
-
2007
- 2007-12-17 JP JP2007324692A patent/JP5022204B2/en not_active Expired - Fee Related
-
2008
- 2008-07-11 WO PCT/JP2008/062570 patent/WO2009078191A1/en active Application Filing
- 2008-07-11 US US12/746,251 patent/US20100251945A1/en not_active Abandoned
- 2008-07-11 EP EP08778085.4A patent/EP2224166A4/en not_active Withdrawn
- 2008-07-11 KR KR1020107012512A patent/KR20100087365A/en active Search and Examination
- 2008-07-11 KR KR1020137021254A patent/KR101331645B1/en active IP Right Grant
- 2008-07-11 CN CN200880118913.6A patent/CN101883951B/en active Active
Also Published As
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|---|---|
| US20100251945A1 (en) | 2010-10-07 |
| KR101331645B1 (en) | 2013-11-20 |
| EP2224166A4 (en) | 2014-05-14 |
| CN101883951B (en) | 2014-04-23 |
| KR20100087365A (en) | 2010-08-04 |
| JP2009145013A (en) | 2009-07-02 |
| JP5022204B2 (en) | 2012-09-12 |
| WO2009078191A1 (en) | 2009-06-25 |
| EP2224166A1 (en) | 2010-09-01 |
| KR20130099249A (en) | 2013-09-05 |
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