CN107690557A - Super low nitrogen oxide burning device - Google Patents
Super low nitrogen oxide burning device Download PDFInfo
- Publication number
- CN107690557A CN107690557A CN201780001400.6A CN201780001400A CN107690557A CN 107690557 A CN107690557 A CN 107690557A CN 201780001400 A CN201780001400 A CN 201780001400A CN 107690557 A CN107690557 A CN 107690557A
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- Prior art keywords
- fuel
- ejectisome
- combustion furnace
- main fuel
- oxidant
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
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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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
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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
- F23C2202/00—Fluegas recirculation
- F23C2202/20—Premixing fluegas with fuel
Abstract
The present invention relates to the super low nitrogen oxide burning device of a kind of interior recirculation based on burning gases and fuel optimization, the present invention provides a kind of super low nitrogen oxide burning device, and it includes：Combustion furnace；Burner, its side are inserted in the combustion furnace, and the inside face of the side inserted and outer peripheral face and the combustion furnace separates predetermined distance；Main fuel ejectisome, positioned at the center of the burner；Auxiliary fuel ejectisome, around the main fuel ejectisome, and its end is retracted defined be spaced from a side end of the burner towards opposite side；Fuel recycle port, on the outer peripheral face of the burner near the end location of the auxiliary fuel ejectisome；And sensor, CO concentration contained in the burning gases in the combustion furnace is resulted from for sensing.
Description
Technical field
The present invention relates to a kind of super low nitrogen oxide burning device of the interior recirculation based on burning gases, in more detail and
Speech, be related to a kind of super low nitrogen oxide burning device, in its combustion chamber caused burning gases without extra device i.e. from
Combustion chamber transmission, without the external connection passage transmission by the combustion chamber, by for realizing more efficient combustion gas
The structure of the burner of body flowing and fuel distribution optimal control, realize the interior recirculation of more efficient burning gases.
Background technology
The main energy sources of the mankind are the fossil fuels of hydro carbons now.But caused by the product after this kind of combustion of fossil fuel
Problem of environmental pollution is serious.There is nitrogen oxides (NO in Environmental Pollution sourcex), carbon dioxide (CO2), also fuel is incomplete
Carbon monoxide caused by burning (CO) and coal smoke (soot) etc..
Using in the existing burner of fossil fuel, chemical reaction during due to burning, inevitably generation chemistry
Formula is NO and NO2Nitrogen oxides (NOx).Low NOxCombustion technology is fired by the mixed form of fuel and air, air-fuel ratio etc.
The structural improvement of burner and reach suppress NO_x formation purpose.Caused nitrogen oxides and air in combustion
In other oxygen react, trigger smog and atmospheric ozone increase etc. environmental problem.Particularly in this combustion process
Caused emission (emission) damages to environment and health, therefore various countries are just with increasingly stricter mark
Standard strengthens control.
According to generational verctor, the species of nitrogen oxides can be divided into hot nitrogen oxide (Thermal NOx), Quick-type
Nitrogen oxides (Prompt NOx) and fuel NO (Fuel NOx).Hot nitrogen oxide is that the nitrogen in air exists with oxygen
React and generate at a high temperature of more than 1600 DEG C, in burning life at initial stage when prompt NO is hydrocarbon fuel combustion
Into, fuel NO is generated by the reaction of nitrogen component contained in fuel.In such nitrogen oxides
In terms of countermeasure, due to the gaseous fuels such as natural gas not nitrogen containing component, therefore for hot nitrogen oxide and prompt NO
The control of concerns be possible to more effective.
Nitrogen oxides turns into the reason for photochemical fog and acid rain, it is known that animals and plants is caused with serious influence, for a long time
Since Many researchers have studied various reduction NOxMethod.
The low NO thus attempted at presentxMethod has the multistage combustion of exhaust gas recirculatioon, water or steam injection, air and fuel
Burn, SNCR reacts (SNCR, selective non-catalytic reduction), selective catalysis also
Original reaction (SNCR, selective catalytic reduction) etc..Just attempted in after-combustion region in developed country recently
Remove NOxMethod, it is believed that either in NOxReduction rate is still all effective in terms of economy.
As above-mentioned for cutting down NOxExisting method, patent document 1 provides the exhaust of a kind of liquid and gas again
Three-level burner is circulated, it is in order to cut down nitrogen oxides (NOx) growing amount, to combustion air and general air and exhaust
Mixed and point three-level supplies, mixing ratio at different levels is different, to make the life of localized high temperature regions caused by multistage combustion
Into minimum, and combustion zone is expanded, to realize the uniform heating of boiler internal.
In the patent document 1, as the key element for being recycled exhaust, possess multiple exhaust tumblings, again
The extra device such as circulation conduit and air door (damper), to make exhaust back flow back into combustion furnace, but has the disadvantage that,
Described device needs the extra outside for being arranged on combustion furnace, therefore required space becomes big.
On the other hand, on patent document 2, with reference to the granted patent of the applicant's earlier application, as shown in Figure 4, there is provided
A kind of interior recirculation technology, caused burning gases 3', 4' are from combustion furnace without extra device in its combustion furnace 1'
To transmitting inside burner 2' inside 1', without the external connection passage transmission by combustion furnace, but have the disadvantage that, Wu Fayou
Effect ground utilizes the burning gases 4' of the subregion in combustion furnace 1' flowing, and does not consider the control of fuel feed.
【Online technique document】
【Patent document】
(patent document 1) KR 10-2005-0117417 A
(patent document 1) KR 10-1512352 B1
The content of the invention
Technical problem to be solved
Therefore, the present invention is above-mentioned in order to solve the problems, such as, it is desirable to provide a kind of super low nitrogen oxide burning device, it is used
Interior recirculation technology, the technology make to result from formed with multiple while oxidant is supplied to the central area of combustion furnace
Burning gases in the combustion furnace of flame field without extra device i.e. from furnace interior transmission, without the outside by combustion furnace
Interface channel transmission, the more smoothly recycling of its burning gases flowed by recirculation regions in combustion furnace and
Fuel distributes optimal control, and lifting nitrogen oxides cuts down effect.
Solves the scheme of technical problem
In order to reach above-mentioned purpose, the present invention provides a kind of super low nitrogen oxide burning device, and it includes：Combustion furnace；
Burner, its side are inserted in the combustion furnace, the inside face of the side inserted and outer peripheral face and the combustion furnace every
Open predetermined distance；Main fuel ejectisome, positioned at the center of the burner；Auxiliary fuel ejectisome, sprayed around the main fuel
Beam, and its end is retracted defined be spaced from a side end of the burner towards opposite side；Fuel recycle port, position
Near the end present position of the auxiliary fuel ejectisome on the outer peripheral face of the burner；And sensor, it is used for
Sensing results from CO concentration contained in burning gases in the combustion furnace, wherein, by the main fuel ejectisome to institute
Combustion furnace supply main fuel is stated, its quantity delivered is less than default amount, and by the auxiliary fuel ejectisome to the burning
Stove additional services auxiliary fuel, its quantity delivered be equal to the main fuel relative to the default amount reduction amount, so as to
Burnt in the combustion furnace, when the CO concentration in the combustion furnace sensed by the sensor is more than default concentration
When, increase the quantity delivered of the main fuel, is produced because of the burning and the inner peripheral surface in the combustion furnace and the burner
Outer peripheral face between the burning gases that flow, pass through by the flow velocity of the auxiliary fuel sprayed by the auxiliary fuel ejectisome
The fuel recycle port flows into the inside of the burner, so as to be burnt again.
It is preferred that further comprising oxidant recirculation guide portion, it is located at the main fuel ejectisome and fired with the auxiliary
Between expecting ejectisome, centered on the main fuel ejectisome, multiple institutes are configured with across defined interval on same circumference
Auxiliary fuel ejectisome is stated, the part in the burning gases flowed into the recycle port side is sprayed to the auxiliary fuel
Between body gap flowing and flow into the oxidant recirculation guide portion, and with the oxidation supplied to the main fuel ejectisome
Agent mixes and the main fuel with supplying to the main fuel ejectisome together burns.
It is preferred that the oxidant recirculation guide portion includes：Interior recirculation sleeve pipe, it is with the auxiliary fuel ejectisome
On the basis of obliquely configure；Guiding element is connected, it extends from the rear end of the interior recirculation sleeve pipe；Nozzle, it is connected to described
The rear end of guiding element is connected, the moving direction of the burning gases for changing flowing.
It is preferred that the nozzle inclination configure the main fuel ejectisome and the oxidant recirculation guide portion it
Between, so as to reduce between the i.e. described main fuel ejectisome of the flowing space of the oxidant and the oxidant recirculation guide portion
Width.
It is preferred that further comprising that recycling promotes lug boss, it is attached to the nozzle and the main fuel ejectisome
Between exterior face, the recycling promotes lug boss increase in the main fuel ejectisome and the oxidant recirculation guide portion
Between the flow velocity of burning gases that flows.
Beneficial effect
As described above, according to super low nitrogen oxide burning device of the present invention, using interior recirculation technology, without
Extra device is the burning gases that furnace interior is resulted from from combustion chamber transmission, without passing through the outer of the combustion chamber
Portion's interface channel transmission.
In addition, the structure of the recycle port of smooth outflow by guiding burning gases, optimizes following again for burning gases
Ring, therewith the burning gases made in combustion furnace so that multi-level form flows and more swimmingly burns, so as to realize ultralow nitrogen
Oxide is run, and is together burnt based on the burning gases of recycling and oxidant and fuel, so that in combustion furnace
Flame stabilization.
In addition, the optimal control distributed by the fuel of supply, can further cut down nitrogen oxides.
Brief description of the drawings
Fig. 1 is the side skeleton diagram for the super low nitrogen oxide burning device that one embodiment of the invention is related to.
Fig. 2 is the side skeleton diagram for the super low nitrogen oxide burning device that one embodiment of the invention is related to, and is shown ultralow
The combustion process of nitrogen oxide burning device.
Fig. 3 is the side skeleton diagram for the super low nitrogen oxide burning device that another embodiment of the present invention is related to, and is shown super
The combustion process of low nitrogen oxide burning device.
Fig. 4 is the side skeleton diagram of existing burner.
Fig. 5 is the flow chart for the combustion process for showing super low nitrogen oxide burning device of the present invention.
Fig. 6 shows NOxGrowing amount, show as it is existing recycling multilevel combustion device (patent document 2) and not
Using NO in the case of recycle portxGrowing amount and adopted as super low nitrogen oxide burning device of the present invention
With NO in the case of recycle portxGrowing amount.
Fig. 7 shows NOxGrowing amount, respectively illustrate not using in the case of fuel distribution optimal control and use
NO under situationxGrowing amount.
【Reference】
1：Combustion furnace
5：Burner
10：Main fuel ejectisome
11：Main fuel ejection section
21：Fuel recycle port
20：Auxiliary fuel ejectisome
30：Cyclone
40：Oxidant recirculation guide portion
41：Interior recirculation sleeve pipe
43：Connect guiding element
45：Nozzle
47：Dip member
50：Fuel supplying part
51：First fuel feed pipe line
52：Second fuel feed pipe line
55、56：Magnetic valve
60：The multistage set of air
72：First time flame space
74：Second of flame space
76：The burning gases of recirculation regions
78：Pre-mix zone
80：Oxidant supply unit
85：Central oxidizer ejectisome
90：Recycling promotes lug boss
100：Super low nitrogen oxide burning device
Embodiment
By referring to accompanying drawing to a preferred embodiment of the present invention will be described in detail, as above purpose of the invention, feature with
And further advantage will be definitely.The embodiment of description is used as example to provide to illustrate the invention, is not used to
Limit the technical scope of the present invention.
As needed, form the present invention super low nitrogen oxide burning device each inscape can be used as it is one-piece type
To use, or separation uses each other.In addition, according to type of service, it is convenient to omit part inscape and use.
Below, the super low nitrogen oxide burning device being related to referring to the drawings to one embodiment of the invention is described in detail.
The overall structure explanation of super low nitrogen oxide burning device
First, reference picture 1 observes the overall knot for the super low nitrogen oxide burning device 100 that one embodiment of the invention is related to
Structure.
Super low nitrogen oxide burning device 100 includes：Combustion furnace；Burner 5, its side are inserted in the combustion furnace；
Main fuel ejectisome 10, positioned at the central portion of the burner 5；Auxiliary fuel ejectisome 20, around main fuel ejectisome 10, and
Its end is retracted defined be spaced from a side end of the burner 5 towards opposite side；Fuel recycle port 21, positioned at institute
Near the end present position for stating the auxiliary fuel ejectisome 20 on the outer peripheral face of burner 5；And oxidant recirculation
Guide portion 40, between the main fuel ejectisome 10 and auxiliary fuel ejectisome 20.
The side of burner 5 is inserted in combustion furnace 1, the inner peripheral surface of its neighboring and combustion furnace 1 separate as defined between
Every.
Specifically, the inserted mode of burner 5 is that its leading section 6 (is in Fig. 2 from the inserting surface in insertion combustion furnace 1
The downside of combustion furnace 1) defined interval a is separated, thus, the recirculation zone of the burning gases resulted from combustion furnace can be divided
Domain.
Main fuel ejectisome 10 includes：Transferred unit 13, it is connected with main fuel supply pipeline 51；And main fuel ejection section
11, it is directly connected to the transferred unit 13.The transferred unit 13 is used to safely for main fuel to be transferred to main fuel ejection section
11, there can be uniform diameter.
As an embodiment, main fuel ejection section 11 can have the shape that diameter becomes larger, and pass through its outer peripheral face
The supplied main fuel of injection.That is, it is (not shown) into master in the spray-hole of the outer peripheral face of main fuel ejection section 11 by formation
Fuel in fuel injection portion 11 is injected into the inner space (reference of reference picture 2 between each fuel injection body 10,20
15).That is, radial direction of the fuel along the main fuel ejection section 11 in main fuel ejection section 11 is ejected into the oxidation of inflow
In agent.
On the other hand, can be along the inside configuration center oxidant ejectisome 85 of main fuel ejectisome 10.Wherein, form
For nozzle can be inserted in the end of central oxidizer ejectisome 85, so as to adjust air quantity delivered.The center oxidation
After central shaft flowing of the oxidant that agent ejectisome 85 makes to supply from oxidant supply unit 80 along main fuel ejectisome 10, supply
To being first time flame space 72 to the flame kernel portion of combustion furnace 1.
Thus, in flame kernel portion it is the mixed effect of promotion flame and oxidant in first time flame space 72, suppresses
Prominence is formed, so as to guide blue-flame to be formed.At the same time, the localized high temperature regions on flame kernel portion periphery are reduced, so as to first
The secondary generation for cutting down nitrogen oxides.
Auxiliary fuel ejectisome 20 is matched somebody with somebody centered on main fuel ejectisome 10 on same circumference across defined interval
Put.The quantity of auxiliary fuel ejectisome 20 is simultaneously unrestricted, but can configure 6 to 12 auxiliary fuel ejectisomes 20, preferably protects
Hold identical interval and configure 8 auxiliary fuel ejectisomes 20.The front end of auxiliary fuel ejectisome 20 is from the combustion in combustion furnace 1
One lateral opposite side retraction of burner 5.
In other words, the front end of auxiliary fuel ejectisome 20 is located at inserts from the leading section 6 of burner 5 towards the described of combustion furnace
Enter face (being downside in Fig. 1) and separate predetermined distance part.
Burnt from the fuel that auxiliary fuel ejectisome 20 sprays in combustion furnace 1, and rotating flow is produced in combustion furnace 1
It is dynamic.
As described above, burner 5 is inserted more deeply into combustion furnace 1, so as to which clearly division produces in combustion furnace 1
In the recirculation regions of the burning gases in combustion furnace 1, so that burning gases swimmingly flow, and because above-mentioned auxiliary is fired
Expect the position of ejectisome 20, can more efficiently carry out the recycling of burning gases described later.
Main fuel ejectisome 10 and auxiliary fuel ejectisome 20 can be made up of hollow cylindrical tube.From oxidant
Supply unit 80 supplies oxidant to the space between main fuel ejectisome 10 and auxiliary fuel ejectisome 20.The oxidant can be with
With formed by cyclone (swirler) 30 positioned at the front end of main fuel ejectisome 10 state of axial direction or tangential momentum supply to
Inside combustion furnace 1, or it is not directly fed to by cyclone 30 in combustion furnace 1.
By the stream of the oxidant supplied at a high speed to the space between main fuel ejectisome 10 and auxiliary fuel ejectisome 20
Speed, form low-pressure state.
Fuel is divided into main fuel (Main fuel) and auxiliary fuel (2nd fuel) from fuel supplying part 50 and supplied extremely
The main fuel ejectisome 10 and auxiliary fuel ejectisome 20.Specifically, fuel passes through filter from fuel supplying part 50
(not shown) goes the removal of impurity, after pump suction (not shown), be divided into the first supply pipeline 51 and the second supply pipeline 52 and
Supply to each fuel injection body 10,20.Magnetic valve 55,56 is respectively arranged with the supply pipeline 51,52, so as to suitable
Locality supply and block as main fuel (Main fuel) and auxiliary fuel (2nd fuel) each fuel for supplying.
Fuel recycle port 21 is located between the leading section 6 of burner 5 and the inserting surface of combustion furnace 1.Specifically, with
Form of slits is located at the location of end of auxiliary fuel ejectisome 20, thus makes the caused burning gases stream in combustion furnace
Enter the inside of burner 5, and to the auxiliary fuel ejectisome 20 and/or the side of oxidant recirculation guide portion 40 described later
Flow and burnt, so as to cut down nitrogen oxides contained in burning gases.
Oxidant recirculation guide portion 40 includes：(the Forced Internal of interior recirculation sleeve pipe 41
Recirculation sleeve), tilted on the opening portion of combustion furnace 1 (not shown) on the basis of auxiliary fuel ejectisome 20
Ground configures；Guiding element 43 is connected, is extended from interior recirculation sleeve pipe 41；Nozzle 45, the rear end of connection guiding element 43 is connected to, for changing
Become the moving direction of the burning gases of flowing；And dip member 47, obliquely configure in oxidant recirculation guide portion 40
Interior lower end.
Interior recirculation sleeve pipe 41 obliquely configures, and more becomes from the portion of initially flowing into of the burning gases i.e. front end of burner 5
To the back-end closer to opening portion center.That is, the rear end of interior recirculation sleeve pipe 41 is more tended to, inner width is with regard to smaller.Connection is led
Part 43 is used to enable slowly to be flowed by the burning gases that interior recirculation sleeve pipe 41 flows into, and it keeps certain width
Degree.
Nozzle 45 by the burning gases of the flowing in the combustion furnace 1 by interior recirculation sleeve pipe 41 and connection guiding element 43 to
Space injection between main fuel ejectisome 10 and oxidant recirculation guide portion 40.The burning gases and oxidant of injection are together
To the internal flow of combustion furnace 1.The nozzle 45 between main fuel ejectisome 10 and oxidant recirculation guide portion 40 obliquely
Configuration.That is, the width between main fuel ejectisome 10 and oxidant recirculation guide portion 40 is reduced, so as to realize hole
(orifice) structure of shape.The configuration structure of nozzle 45 as described above makes to spray to main fuel ejectisome 10 and auxiliary fuel
The flowing velocity of the oxidant of space supply between body 20 faster, so as to being flowed at high speed into combustion furnace 1.
That is, the space between main fuel ejectisome 10 and nozzle 45 narrows, so as to according to Bernoulli's theorem, the stream of oxidant
Speed can increase.Pass through such structure, by increasing capacitance it is possible to increase the momentum of the flowing occurred in combustion furnace 1.
Dip member 47 is disposed on connection guiding element 43 and the structure on the boundary line of nozzle 45, and it adjusts burning gases
Flowable width, finally adjusts flow velocity.
The multistage set 60 of air is the structure of hollow cylinder shape, is configured to the oxidation that will be supplied from oxidant supply unit 80
Agent separation supply, so as to realize the multistage supply of oxidant, finally thus tends to the inside and outside of the multistage set 60 of air
Multistage flame is internally formed in combustion furnace 1.
Recycling promotes lug boss 90 to configure on the outer peripheral face of the multistage set 60 of air.Specifically, the recycling promotees
Enter lug boss 90 and play to reduce space between the nozzle 45 for forming oxidant recirculation guide portion 40 and the multistage set 60 of air
Function.By structure as above, the flow velocity of the burning gases flowed by oxidant recirculation guide portion 40 from combustion furnace 1 is passing through
Cross when recycling promotes near lug boss 90 and be improved.Thus, prevent from again flowing into by oxidant recirculation guide portion 40
Burning gases separation (separation) in combustion furnace 1, the final recycling for promoting burning gases.
The explanation of the combustion process of super low nitrogen oxide burning device
Next, with further reference to Fig. 2 to Fig. 3 and Fig. 5, to the present embodiments relate to ultralow nitrogen oxide burning
The combustion process and effect of device illustrate.
To ultralow nitrogen oxide burning unit feeding fuel and oxidant, so as to burnt (S100).
Wherein, the fuel of supply is divided into main fuel and auxiliary fuel to supply, with less than default amount (for example, with oxidation
The theoretical equivalence ratio of agent) supply main fuel, and additional services auxiliary fuel, its amount are equal to the amount for supplying main fuel less.
By the supply oxidant of oxidant supply unit 80, the part in the oxidant supplied passes through main fuel ejectisome
Central oxidizer ejectisome 85 inside 10 is flowed.
At the same time, main fuel is supplied to main fuel injection from fuel supplying part 50 by the first fuel feed pipe line 51
Body 10.
The main fuel experience of the flowing in the main fuel ejectisome 10 is by the outer peripheral face of main fuel ejection section 11 along radius
The process of direction injection, the main fuel so sprayed react with oxidant, form pre-mix zone 78.Wherein, the master
Fuel injection portion 11, which has, more tends to the more unlimited shape in the direction of combustion furnace 1, therefore the fuel sprayed can form wider part
The pre-mix zone 78 of position.
The premix in pre-mix zone 78 is formed by the front end of main fuel ejectisome 10 or passes through cyclone 30
Combustion is ejected into the state with axial momentum (Axial momentum) and tangential momentum (Tangential momentum)
Burn in stove 1, form first time flame space and burnt.
Then, fuel is supplied to auxiliary fuel ejectisome 20 from fuel supplying part 50 by the second fuel feed pipe line 52.
By upper side from auxiliary fuel ejectisome 20 to first time flame space 72 spray auxiliary fuel by with first time flame
The process that unreacted oxidant in space 72 is reacted, form second of flame space 74.First time flame space 72
In imflammable gas in a part mixed with supplying to the premix of the outer rim of cyclone 30, and be moved to first time flame
Wake flow in, formed the second flame space 74.
The fuel sprayed from main fuel ejectisome 10 flows to form first time flame sky based on the multi-staged air in combustion furnace 1
Between 72, from the fuel that auxiliary fuel ejectisome 20 sprays based on being transmitted by the first time flame space 72 of main fuel ejectisome 10
Ambient temperature caused by heat and residual oxygen carry out partial oxidation reaction, are converted into a variety of imflammable gas, so as in fire
Flame wake flow forms second of flame space 74.Therefore, clearly division ground composition includes the fuel-rich region and fuel is thin
Region, be configured to multistage flame status in combustion furnace.
In other words, the main fuel sprayed along the radial direction of main fuel ejectisome 10 is pre-mixed with oxidant, shape
Into pre-mix zone 78, the premix being supplied to from the pre-mix zone 78 in combustion furnace 1 forms first time flame space
72, and auxiliary fuel is sprayed from auxiliary fuel ejectisome 20 to the rear end of first time flame space 72, so as to form final flame
Form.
As described above, the combustion in combustion furnace 1 by being sprayed by main fuel ejectisome 10 and auxiliary fuel ejectisome 20
Material forms multistage flame space.Second of flame space 74 is formed in the rearward end of the first time flame space 72.Second
Flame space 74 is formed as first time flame space 72 being looped around the form in the space deeper into the private side of combustion furnace 1.
By being formed because of the supply of above-mentioned oxidant between main fuel ejectisome 10 and auxiliary fuel ejectisome 20
Low pressure, including burning gases 75 in the multistage flame space of the first time flame space 72, second flame space 74
Inleting oxidant recycles guide portion 40 and flowed, and flow to be formed therewith and is sprayed in main fuel ejectisome 10 and auxiliary fuel
The side of pre-mix zone 78 between beam 20, and burnt in combustion furnace 1.
Separately therefrom, the space between the inner peripheral surface of combustion furnace 1 and the outer peripheral face of burner 5 forms recirculation zone
Domain.In such recirculation regions, burning gases 76 are flowed with eddy currents.
Burner 5 is passed through in burning gases 76 caused by the interior recirculation region of combustion furnace 1 by above-mentioned combustion process
Space between the inner peripheral surface of outer peripheral face and combustion furnace 1 is that recirculation regions are flowed.
The low pressure formed by the fuel sprayed at a high speed from the front end of auxiliary fuel ejectisome 20, in recirculation regions stream
Dynamic burning gases 76 flow into fuel recycle port 21.
The burning gases 76 for so flowing into fuel recycle port 21 can be with spraying from the front end of auxiliary fuel ejectisome 20
The fuel penetrated is mixed and supplied to being burnt inside combustion furnace 1.
In addition, as another embodiment, connect the inside of combustion furnace 1 and the neighboring of oxidant recirculation guide portion 40
It is logical, so that a part in the burning gases 76 of recirculation regions flowing to oxidant recirculation guide portion 40 because supplying
Low pressure caused by oxidant and flow, by the way that between each auxiliary fuel ejectisome 20 spaced apart from each other, inleting oxidant follows again
Ring guide portion 40, and flow to around main fuel ejectisome 10, mixed with pre-mix zone 78, and supply to combustion furnace 1
First time flame space 72, thus allow for burning.
In addition, recirculation regions flowing burning gases 76 remaining part as described above, by from auxiliary fuel
The low pressure that the fuel that the front end of ejectisome 20 is sprayed at a high speed is formed, flow into combustion furnace 1 by fuel recycle port 21
Row burning.On the other hand, the burning gases that the flowing space of oxidant is expelled to from oxidant recirculation guide portion 40 pass through again
Circulation promotes lug boss 90 to increase flowing velocity, so as to be prevented while the flow velocity of burning gases and oxidant is improved
Separation.
After above-mentioned process, premix and burning gases undergo what is flowed into first time flame space 72 and burn
Process, so as to form flame in combustion furnace 1.
Also, the CO concentration (S200) in sensing combustion furnace 1 in real time.
It is real-time by the sensor (not shown) being arranged on combustion furnace 1 in a period of burn as described above
The CO concentration in combustion furnace 1 is sensed to be monitored.
As described above, supplying main fuel less and being burnt, therefore imperfect combustion can be more or less formed, produce CO,
Thus in real time sensing because of imperfect combustion and caused by CO concentration.
Also, compare the CO concentration in combustion furnace 1 and default CO concentration (S300), when the CO concentration in combustion furnace 1 is low
When default concentration, keep its state and continue to burn and monitor, when the CO concentration in combustion furnace 1 is default dense
When more than degree, increase the quantity delivered (S400) of main fuel.
Fig. 6 respectively illustrates existing recycling multilevel combustion device (patent document 2) and of the present invention ultralow
The NO of nitrogen oxide burning devicexGrowing amount.
Fig. 7 respectively illustrates super low nitrogen oxide burning device of the present invention not using fuel distribution optimal control
Under situation and using NO in the case of fuel distribution optimal controlxGrowing amount.
It can confirm with reference to described Fig. 6 and Fig. 7, be distributed by the structure of recycle port 21 and the fuel of supply
Optimal control, while 1 internal loading of combustion furnace is reduced, it can effectively prevent NOxGeneration.
As described above, according to super low nitrogen oxide burning device of the present invention, the caused combustion gas in combustion furnace
Body is together back flowed back into combustion furnace and reacted with oxidant without extra power, so as to be cut down on source
Nitrogen component in fuel aoxidizes and caused nitrogen oxides, on this basis by being different from the structure of existing burner,
By the Multiple staged recycle of the caused burning gases in combustion furnace, make the recycling of burning gases more smoothly, and pass through
The optimal control of the fuel distribution of supply, can obtain higher nitrogen oxides and cut down effect.
Claims (5)
- A kind of 1. super low nitrogen oxide burning device, it is characterised in that including：Combustion furnace (1)；Burner (5), its side are inserted in the combustion furnace (1), and the side inserted and outer peripheral face and the burning The inside face of stove (1) separates predetermined distance；Main fuel ejectisome (10), positioned at the center of the burner (5)；Auxiliary fuel ejectisome (20), is provided around the main fuel ejectisome (10), and its end is from the burner (5) A side end towards opposite side be retracted as defined in be spaced；Fuel recycle port (21), the auxiliary fuel ejectisome (20) on the outer peripheral face of the burner (5) Near the present position of end；AndSensor, CO concentration contained in the burning gases in the combustion furnace (1) is resulted from for sensing,Wherein, main fuel is supplied to the combustion furnace (1) by the main fuel ejectisome (10), its quantity delivered is less than default Amount,Institute is equal to the combustion furnace (1) additional services auxiliary fuel, its quantity delivered by the auxiliary fuel ejectisome (20) State main fuel relative to the default amount reduction amount, so as to be burnt in the combustion furnace (1),When the CO concentration in the combustion furnace (1) sensed by the sensor is more than default concentration, increase the master The quantity delivered of fuel,Produce because of the burning and flowed between the inner peripheral surface of the combustion furnace (1) and the outer peripheral face of the burner (5) Burning gases, followed again by the fuel by the flow velocity of the auxiliary fuel sprayed by the auxiliary fuel ejectisome (20) Central port (21) flows into the inside of the burner (5), so as to be burnt again.
- 2. super low nitrogen oxide burning device according to claim 1, it is characterised in thatFurther comprise oxidant recirculation guide portion (40), it is located at the main fuel ejectisome (10) and the auxiliary fuel Between ejectisome (20),Centered on the main fuel ejectisome (10), multiple auxiliary are configured with across defined interval on same circumference Fuel injection body (20),A part in the burning gases flowed into fuel recycle port (21) side, by the main fuel ejectisome (10) flow velocity of the oxidant supplied between the auxiliary fuel ejectisome (20) and flow into oxidant recirculation guiding Portion (40), and flowed into the combustion furnace (1) to be burnt.
- 3. super low nitrogen oxide burning device according to claim 1 or 2, it is characterised in thatThe oxidant recirculation guide portion (40) includes：Interior recirculation sleeve pipe (41), obliquely configured relative to the auxiliary fuel ejectisome (20)；Guiding element (43) is connected, it extends from the rear end of the interior recirculation sleeve pipe (41)；Nozzle (45), the rear end of the connection guiding element (43) is connected to, the moving direction of the burning gases for changing flowing.
- 4. super low nitrogen oxide burning device according to claim 3, it is characterised in thatThe nozzle (45) is obliquely configured in the main fuel ejectisome (10) and the oxidant recirculation guide portion (40) Between, guided so as to reduce the i.e. described main fuel ejectisome (10) of the flowing space of the oxidant with the oxidant recirculation Width between portion (40).
- 5. super low nitrogen oxide burning device according to claim 4, it is characterised in thatFurther comprise that recycling promotes lug boss (90), be attached to the nozzle (45) and the main fuel ejectisome (10) Between exterior face,The recycling promotes lug boss to be guided for increasing in the main fuel ejectisome (10) and the oxidant recirculation The flow velocity of the burning gases flowed between portion (40).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2016-0069481 | 2016-06-03 | ||
| KR20160069481 | 2016-06-03 | ||
| KR10-2017-0066890 | 2017-05-30 | ||
| KR1020170066890A KR101992413B1 (en) | 2016-06-03 | 2017-05-30 | Low NOx Burner |
| PCT/KR2017/005668 WO2017209503A1 (en) | 2016-06-03 | 2017-05-31 | Ultra-low nitrogen oxide combustion apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107690557A true CN107690557A (en) | 2018-02-13 |
| CN107690557B CN107690557B (en) | 2020-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780001400.6A Active CN107690557B (en) | 2016-06-03 | 2017-05-31 | Ultra-low nitrogen oxide combustion device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6703626B2 (en) |
| KR (1) | KR101992413B1 (en) |
| CN (1) | CN107690557B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200129447A (en) | 2019-05-08 | 2020-11-18 | 주식회사 수국 | Low NOx Burner Having Combustion Head of Perforated Plate Type |
| CN112204307A (en) * | 2019-05-08 | 2021-01-08 | 株式会社水国 | Low nitrogen oxide burner with punching plate type burner head |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102068037B1 (en) * | 2018-03-19 | 2020-01-20 | 한국생산기술연구원 | Low NOx combustion device through premixing and diffusion flame formation |
| KR102115576B1 (en) * | 2018-11-30 | 2020-05-27 | 한국생산기술연구원 | Low NOx Burner |
| CN109519917A (en) * | 2019-01-03 | 2019-03-26 | 上海华之邦科技股份有限公司 | A kind of interior low nitrogen combustion apparatus recycled of flue gas |
| CN109631036B (en) * | 2019-01-14 | 2023-08-25 | 唐山亿昌热能科技有限公司 | Combustion method of ultralow nitrogen oxides, matched combustion head and combustion device |
| KR102261150B1 (en) * | 2019-09-20 | 2021-06-07 | 한국생산기술연구원 | A Low-NOx combustor capable of internal recirculation of flue gas by using venturi effect through improvement of burner structure |
| KR102317704B1 (en) * | 2019-11-29 | 2021-10-27 | 한국생산기술연구원 | Low NOx Burner comprising recirculation ports |
| KR102424883B1 (en) * | 2020-08-14 | 2022-07-26 | 주식회사 파나시아 | Steam Hydrocarbon Reformer with Burner |
| KR102378008B1 (en) * | 2020-08-14 | 2022-03-24 | 주식회사 파나시아 | Steam Hydrocarbon Reformer with Burner |
| KR102416025B1 (en) * | 2020-08-14 | 2022-07-05 | 주식회사 파나시아 | Steam Hydrocarbon Reformer with Burner |
| KR102382599B1 (en) * | 2020-11-13 | 2022-04-05 | 한국생산기술연구원 | Ultra-low NOx combustion apparatus and combustion system comprising the same |
| US20230213182A1 (en) * | 2021-12-31 | 2023-07-06 | Honeywell International Inc. | Low nox gas burner with cooled flue gas recycle |
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| CN112204307A (en) * | 2019-05-08 | 2021-01-08 | 株式会社水国 | Low nitrogen oxide burner with punching plate type burner head |
| CN112204307B (en) * | 2019-05-08 | 2023-08-04 | 株式会社水国 | Low NOx burner with punched plate type burner head |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170138042A (en) | 2017-12-14 |
| KR101992413B1 (en) | 2019-06-25 |
| JP2019517657A (en) | 2019-06-24 |
| JP6703626B2 (en) | 2020-06-03 |
| CN107690557B (en) | 2020-03-06 |
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