CN109424961A - A kind of burner - Google Patents
A kind of burner Download PDFInfo
- Publication number
- CN109424961A CN109424961A CN201710792257.9A CN201710792257A CN109424961A CN 109424961 A CN109424961 A CN 109424961A CN 201710792257 A CN201710792257 A CN 201710792257A CN 109424961 A CN109424961 A CN 109424961A
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- China
- Prior art keywords
- oxygen
- burner
- rifle
- outlet
- temperature
- Prior art date
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- 239000000446 fuel Substances 0.000 claims abstract description 101
- 239000007788 liquid Substances 0.000 claims abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 110
- 239000001301 oxygen Substances 0.000 claims description 110
- 229910052760 oxygen Inorganic materials 0.000 claims description 110
- 239000007789 gas Substances 0.000 claims description 91
- 239000002028 Biomass Substances 0.000 claims description 87
- 239000000523 sample Substances 0.000 claims description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 17
- 239000003546 flue gas Substances 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 23
- 239000000843 powder Substances 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 63
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 230000009466 transformation Effects 0.000 description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000010248 power generation Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- -1 biogas Chemical compound 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The invention discloses a kind of burners, belong to fuel combustion appliance technical field, it include: burner outlet (7), it includes one or more fuel outlets, for being connected to the burner hearth (9) of boiler, one or more fuel are transported in burner hearth (9) and are burnt；First air channel (1), First air entrance is provided on one end side wall, and the other end extends to the burner outlet (7) and is formed as First air outlet；Secondary air channel (2), Secondary Air entrance is provided on one end side wall, and the other end extends to the burner outlet (7) and is formed as Secondary Air outlet；Oil gas supplies rifle (3), and one end is formed as oil gas entrance, and the other end extends to the burner outlet (7) and is formed as oil gas vent, for timesharing conveying liquid or gaseous fuel.The present invention realizes the supply and burning of multi fuel on the basis of the First air of traditional coal powder fired boiler burner and Secondary Air by increasing oil gas supply rifle (3).
Description
Technical field
The present invention relates to fuel combustion appliance technical field more particularly to a kind of burners.
Background technique
Due to global warming and reply climate change, need to reduce the carbon intensity of fossil-fired unit.Therefore
Coal-burning power plant needs to maintain annual generation load amount by purchase tradable green certificates or carbon index, or just needs to carry out fuel spirit
Activity transformation, becomes the thermal power plant of low-carbon emission intensity.
The boiler of existing Large-scale fire-electricity unit is largely to use high-efficiency pulverized coal boiler form, to solve the above-mentioned problems,
The prior art has carried out fuel flexibility transformation, but these schemes itself have following defects that
The technical solution of the prior art, which is generally required, does high-cost on a large scale change to boiler body and boiler heating surface
It makes, and generally a kind of fuel that burns, such as pulverized-coal fired boiler is only allowed to be changed to the boiler of fired biomass completely after being transformed, do so
Actually there is no the flexibilities for realizing fuel.
Summary of the invention
(1) goal of the invention
The object of the present invention is to provide a kind of burners, are applied in large-scale power station pulverized-coal fired boiler, by existing power station coal dust
The burner structure of boiler is transformed, on the basis of rebuilding at low cost, so that it may realize the fuel spirit of Large-scale fire-electricity unit
Activity.Rifle, powdered biomass supply rifle, pure oxygen supply rifle and corresponding multi fuel feeding pipe are supplied by increasing oil gas, from
And may be implemented on the basis of the First air of traditional coal powder fired boiler burner and Secondary Air, realize the supply and burning of multi fuel.
The especially introducing of biogas, hydrogen and pure oxygen, may be implemented the low-load combustion-stabilizing of Large-scale fire-electricity unit boiler, to mention
The load range of high boiler at low load peak regulation, increases the peak modulation capacity of fired power generating unit, and the depth peak regulation of power grid is participated in by whole year,
Power plant is set to obtain peak regulation subsidy.Meanwhile the utilization of the high-efficiency cleaning of biomass energy, it can be to avoid biologies such as domestic crop straw burnings
The pollution that matter generates, increases farmers' income.
(2) technical solution
To solve the above problems, the present invention provides a kind of burners, comprising: burner outlet, it includes a kind of or more
One or more fuel are transported in burner hearth and burn for being connected to the burner hearth of boiler by kind fuel outlet；First air
Channel is provided with First air entrance on one end side wall, and the other end extends to the burner outlet and be formed as First air
Mouthful；Secondary air channel is provided with Secondary Air entrance on one end side wall, and the other end extends to the burner outlet and is formed as
Secondary Air outlet；Oil gas supplies rifle, and one end is formed as oil gas entrance, and the other end extends to the burner outlet and is formed as
Oil gas vent, for timesharing conveying liquid or gaseous fuel.
Further, the axis of oil gas supply rifle and the axis in the First air channel form the first angle, and described the
The angular range of one angle is 0 °~30 °.
Further, the oil gas vent end of the oil gas supply rifle is provided with the first shutoff valve；The oil gas supply rifle
Oil gas vent end is additionally provided with first pressure sensor, and/or, the first temperature is provided at the oil gas vent of the oil gas supply rifle
Degree probe；The first pressure sensor is used to detect the oil-air pressure P1 at oil gas vent end and is sent to controller, the control
Collected oil pressure or air pressure P1 are compared by device processed with the first preset pressure, when collected oil pressure or air pressure P1 are lower than the
When one preset pressure, the controller controls first shutoff valve and closes；The first temperature probe is for detecting oil gas
The temperature T1 in exit is simultaneously sent to the controller, and the controller carries out collected temperature T1 and the first preset temperature
Compare, when collected temperature T1 is higher than the first preset temperature, the controller controls first shutoff valve and closes.
Further, the burner further include: powdered biomass supplies rifle, and one end is formed as powdering inlet, the other end
It extends to the burner outlet and is formed as dust outlet.
Further, the axis of the powdered biomass supply rifle is overlapped with the axis in the First air channel.
Further, the axis of the powdered biomass supply rifle and the axis in the First air channel form the second angle,
The angular range of second angle is 0 °~30 °.
Further, the burner further include: oxygen supplies rifle, and one end is formed as oxygen intake, and the other end extends to
The burner outlet is simultaneously formed as oxygen outlet, for introducing oxygen into the burner hearth.
Further, the axis of oxygen supply rifle and the axis in the First air channel form third angle, and described the
The angular range of three angles is 0 °~30 °.
Further, the oxygen outlet end of the oxygen supply rifle is provided with the second shutoff valve；The oxygen supply rifle
Oxygen outlet end is additionally provided with second pressure sensor, and/or, the second temperature is provided at the oxygen outlet of the oxygen supply rifle
Degree probe；The second pressure sensor is used to detect the gas pressure P2 at oxygen outlet end and is sent to controller, the control
Collected gas pressure P2 is compared by device processed with the second preset pressure, when collected gas pressure P2 is pre- beyond second
If when pressure limit, the controller controls second shutoff valve and closes；The second temperature probe is for detecting oxygen
The temperature T2 in exit is simultaneously sent to the controller, and the controller carries out collected temperature T2 and the second preset temperature
Compare, when collected temperature T2 is higher than the second preset temperature, the controller controls second shutoff valve and closes；Institute
It states and is provided with oxygen content testing instrument in burner hearth, for detecting the oxygen content in the burner hearth, the oxygen content testing instrument be will test
To oxygen-containing numerical quantity be sent to the controller, the controller compares collected oxygen-containing numerical quantity with default value
Compared with when collected oxygen-containing numerical quantity is higher than default value, the controller controls second shutoff valve and closes；It is described
Third temp probe is additionally provided in burner hearth, for detecting the flue-gas temperature T3 in the burner hearth, the third temp probe will
The flue-gas temperature T3 detected is sent to the controller, and the controller is default warm by collected flue-gas temperature T3 and third
Degree is compared, when collected flue-gas temperature T3 is higher than third preset temperature, controller control second cut-off
Valve is closed.
Further, the First air channel, which is located at, is provided with First air on one end side wall on the outside of the furnace wall of the boiler and enters
Mouthful；The secondary air channel is set in outside the First air outlet end in the First air channel.
(3) beneficial effect
Above-mentioned technical proposal of the invention has following beneficial technical effect:
The transformation to existing large coal powder boiler of low cost may be implemented in the present invention, by the combustion of existing generating plant pulverized coal boiler
Burner structure is transformed, on the basis of rebuilding at low cost, so that it may realize the fuel flexibility of Large-scale fire-electricity unit.Pass through
Increase oil gas supply rifle, powdered biomass supply rifle, pure oxygen supply rifle and corresponding multi fuel feeding pipe, so as to realize
On the basis of the First air of traditional coal powder fired boiler burner and Secondary Air, the supply and burning of multi fuel are realized.It is supplied by oil gas
It is used to the flexible combination of rifle, powdered biomass supply rifle, oxygen supply rifle, real fuel flexibility is realized, so that coal
Powder boiler can neatly combusting heavy oil, light oil, powdered biomass, natural gas, hydrogen, biogas etc. be a variety of after transformation
Fuel.The low-load combustion-stabilizing of Large-scale fire-electricity unit boiler may be implemented in the especially introducing of biogas, hydrogen and pure oxygen,
To improve the load range of boiler at low load peak regulation, the peak modulation capacity of fired power generating unit is increased, passes through the annual depth for participating in power grid
Peak regulation is spent, power plant is made to obtain peak regulation subsidy.Meanwhile the utilization of the high-efficiency cleaning of biomass energy, straw can be burned to avoid the country
The pollution that the biomass such as stalk generate, increases farmers' income.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure that the burner that the embodiment of the present invention one provides is connect with burner hearth；
Fig. 2 is burner internal structural schematic diagram provided by Embodiment 2 of the present invention；
Fig. 3 is the burner appearance schematic diagram that the embodiment of the present invention four provides；
Fig. 4 is the burner outlet end view that the embodiment of the present invention four provides.
Appended drawing reference:
1, First air channel, 1a, the first straight section, 1b, the first cone section, 1c, the second straight section, 1d, third straight section, 2, Secondary Air
Channel, 2a, the first straight section, 2b, the second straight section, 3, oil gas supply rifle, 4, powdered biomass supply rifle, 5, oxygen supply rifle, 6,
Fixed frame, 7, burner outlet, 8, fixed plate, 9, burner hearth.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Embodiment one
Fig. 1 is the schematic diagram of internal structure that the burner that the embodiment of the present invention one provides is connect with burner hearth.
Fig. 1 is please referred to, which includes: burner outlet 7, First air channel 1, secondary air channel 2, oil gas supply rifle
3。
Burner outlet 7, it includes one or more fuel outlets, for being connected to the burner hearth 9 of boiler, by a kind of or
Pluralities of fuel, which is transported in burner hearth 9, to burn.Specifically, burner outlet 7 is collected by one or more fuel outlets,
Form a unified outlet, so as to 9 interface flexibility of burner hearth, burner hearth 9 herein refers to the furnace of large-scale power station pulverized-coal fired boiler
Thorax.
First air channel 1, First air entrance is provided on one end side wall, and the other end extends to burner outlet 7 and shape
It is exported as First air.First air channel 1 is used to the mixture of pulverized coal conveying and air.
Secondary air channel 2, Secondary Air entrance is provided on one end side wall, and the other end extends to burner outlet 7 and shape
It is exported as Secondary Air.Secondary air channel 2 is used to convey the air of preheating.
Optionally, First air channel 1, which is located on one end side wall on the outside of the furnace wall of boiler, is provided with First air entrance.
Optionally, secondary air channel 2 is set in outside the First air outlet end in First air channel 1, and the two of secondary air channel 2
Secondary wind outlet is connect with burner hearth 9.
Specifically, First air channel 1 include sequentially connected first straight section 1a, first cone section 1b, the second straight section 1c and
Third straight section 1d；First air entrance is set on the side wall of the first straight section 1a；Third straight section 1d extends to burner outlet 7 and shape
It is exported as First air；The area of section of first straight section 1a, the second straight section 1c in First air channel 1 and third straight section 1d are successively
Reduce.
Specifically, secondary air channel 2 includes sequentially connected first straight section 2a and the second straight section 2b；The side of first straight section 2a
Secondary Air entrance is set on wall；Second straight section 2b extends to burner outlet 7 and is formed as Secondary Air outlet；Secondary air channel 2
The first straight section 2a area of section be greater than the second straight section 2b area of section.
Oil gas supplies rifle 3, and one end is formed as oil gas entrance, and the other end extends to burner outlet 7 and is formed as oil gas
Outlet, for timesharing conveying liquid or gaseous fuel.
Optionally, liquid fuel includes but is not limited to heavy oil, light oil.
Optionally, gaseous fuel includes but is not limited to natural gas, biogas, hydrogen.
Optionally, the axis of oil gas supply rifle 3 and the axis in First air channel 1 form the first angle.
Optionally, the angular range of the first angle is 0 °~30 °.
Optionally, the section of oil gas supply rifle 3 includes but is not limited to circle.
Optionally, the diameter of section range of oil gas supply rifle 3 is 1mm~200mm.
Due to being easy to produce tempering when liquid or gas fuel combustion, there are security risks, and therefore, oil gas supplies rifle 3
Oil gas vent end is provided with the first shutoff valve；The oil gas vent end of oil gas supply rifle 3 is additionally provided with first pressure sensor,
And/or first temperature probe is provided at the oil gas vent of oil gas supply rifle 3.When first pressure sensor detects that oil gas supplies
To in rifle 3 oil pressure or air pressure P1 be lower than the first preset pressure when, or when the temperature T1 that first temperature probe detects is higher than
When the first preset temperature, then controller controls the first shutoff valve and closes, and for avoiding the generation of back-fire trouble, improves equipment
Safety.
First pressure sensor is used to detect the oil-air pressure P1 at oil gas vent end and is sent to controller, and controller will be adopted
The oil pressure or air pressure P1 collected is compared with the first preset pressure, when collected oil pressure or air pressure P1 preset pressure lower than first
When power, controller controls the first shutoff valve and closes.
For first temperature probe for detecting the temperature T1 at oil gas vent and being sent to controller, controller will be collected
Temperature T1 is compared with the first preset temperature, when collected temperature T1 is higher than the first preset temperature, controller control the
One shutoff valve is closed.
Optionally, the oil gas vent end of oil gas supply rifle 3 is provided with the first shutoff valve and first pressure sensor, when the
When one pressure sensor detects that oil pressure or air pressure P1 in oil gas supply rifle 3 are lower than the first preset pressure, then controller controls
First shutoff valve is closed.
Optionally, the oil gas vent end of oil gas supply rifle 3 is provided with the first shutoff valve, and the oil gas of oil gas supply rifle 3 goes out
It is provided with first temperature probe at mouthful, when the temperature T1 that first temperature probe detects is higher than the first preset temperature, is then controlled
Device controls the first shutoff valve and closes.
Optionally, the oil gas vent end of oil gas supply rifle 3 is provided with the first shutoff valve and first pressure sensor, oil gas
It supplies and is additionally provided with first temperature probe at the oil gas vent of rifle 3, when first pressure sensor detects in oil gas supply rifle 3
When oil pressure or air pressure P1 are lower than the first preset pressure, or when the temperature T1 that first temperature probe detects is higher than the first default temperature
When spending, then controller controls the first shutoff valve and closes.
In the present embodiment, burner further includes fixed frame 6, is arranged in secondary air channel 2, is welded with secondary air channel 2
Together.
Optionally, the center of secondary air channel 2 is arranged in fixed frame 6.
In the present embodiment, burner further includes fixed plate 8, and the right side in First air channel 1 is arranged in.
Optionally, fixed plate 8 includes but is not limited to round, rectangular.
Specifically, one end that First air channel 1 is formed as First air outlet is fixed by fixed frame 6, it is provided with First air
One end of entrance is fixed by fixed plate 8.The one end for being formed as oil gas entrance on oil gas supply rifle 3 is fixed by fixed plate 8, shape
One end as oil gas vent is located at 2 inside of secondary air channel, while being located at 6 outside of fixed frame.Oil gas supplies rifle 3 in fixed plate
Distributing position on 8 can appropriate adjustment according to actual needs.
Embodiment two
Fig. 2 is burner internal structural schematic diagram provided by Embodiment 2 of the present invention.
Referring to figure 2., the burner of the present embodiment on the basis of example 1, increases powdered biomass supply rifle 4,
One end is formed as powdering inlet, and the other end extends to burner outlet 7 and is formed as dust outlet, for conveying biomass powder
Last fuel.Powdered biomass supplies the powdered biomass in rifle 4 under the carrying of the air of the primary air velocity in First air channel 1
It burns in into burner hearth 9, allows the renewable energy such as a large amount of biomass burning pulverized fuels of traditional large thermal power plant.
Optionally, the center in First air channel 1 is arranged in powdered biomass supply rifle 4, i.e. powdered biomass supplies rifle 4
Axis is overlapped with the axis in First air channel 1.
Optionally, the section of powdered biomass supply rifle 4 includes but is not limited to circle.
Optionally, the diameter of section range of powdered biomass supply rifle 4 is 1cm~50cm.
The low-load combustion-stabilizing of Large-scale fire-electricity unit boiler may be implemented since power plant uses renewable energy as fuel, make
It obtains power plant and obtains electricity price subsidy, and subsidize the usage amount that number is exactly foundation renewable energy and calculated.In order to accurately measure
The usage amount of powdered biomass, powdered biomass supply and are provided with poweder flowmeter and powder concn measuring instrument on rifle 4, realize
Powdered biomass it is measurable, so as to calculate the subsidy number of renewable energy power generation.
Specifically, the axis of powdered biomass supply rifle 4 is overlapped with the axis in First air channel 1, is formed as powder and enters
One end of mouth is fixed by fixed plate 8, and the one end for being formed as dust outlet is located at 1 inside of First air channel.Powdered biomass supplies
It can appropriate adjustment according to actual needs to distributing position of the rifle 4 in fixed plate 8.
In the present embodiment, increase powdered biomass supply rifle 4, powdered biomass separately conveyed with coal dust, it is mutual it
Between be independent of each other, the flexible switching of fuel easy to accomplish, fuel investment is more convenient, and safety is higher.
The structure and connection relationship of the other component structure and connection relationship Yu embodiment one of burner in the present embodiment
Identical, details are not described herein.
Embodiment three
The burner of the present embodiment and embodiment two the difference is that, powdered biomass supplies the setting position of rifle 4
Difference, in the present embodiment, powdered biomass supplies the axis of rifle 4 and the axis in First air channel 1 forms the second angle.
Optionally, the angular range of the second angle is 0 °~30 °.
The structure and connection relationship of the other component structure and connection relationship Yu embodiment two of burner in the present embodiment
Identical, details are not described herein.
Example IV
Fig. 3 is the burner appearance schematic diagram that the embodiment of the present invention four provides.
Fig. 4 is the burner outlet end view that the embodiment of the present invention four provides.
Referring to figure 3., Fig. 4, the burner of the present embodiment increase oxygen supply rifle 5 on the basis of example 2,
One end is formed as oxygen intake, and the other end extends to burner outlet 7 and is formed as oxygen outlet, for introducing oxygen into burner hearth
In 9, sufficient oxygen is provided for Pulverized Coal, powdered biomass fuel, liquid fuel and gaseous fuel, improves the combustion of fuel
Burning rate realizes the oxygen-enriched combusting of pulverized-coal fired boiler, so that the low load combustion of pulverized-coal fired boiler is more stable.
Optionally, the axis of oxygen supply rifle 5 and the axis in First air channel 1 form third angle.
Optionally, the angular range of third angle is 0 °~30 °.
Optionally, the section of oxygen supply rifle 5 includes but is not limited to circle.
Optionally, the diameter of section range of oxygen supply rifle 5 is 1mm~200mm.
Since gas pressure P2 and oxygen that the supply and interruption of oxygen need to be supplied according to oxygen in rifle 5 supply rifle 5
The temperature T2 in exit controlled, therefore, the oxygen outlet end of oxygen supply rifle 5 is provided with the second shutoff valve；Oxygen
The oxygen outlet end of supply rifle 5 is additionally provided with second pressure sensor, and/or, it is provided at the oxygen outlet of oxygen supply rifle 5
Second temperature probe.When the gas pressure P2 that the second pressure sensor at the oxygen outlet end of oxygen supply rifle 5 detects exceeds
The temperature T2 that second temperature probe when the second pre-set pressure range, or at the oxygen outlet of oxygen supply rifle 5 detects
When higher than the second preset temperature, then controller controls the second shutoff valve and closes, to control the oxygen content and flue gas temperature in burner hearth 9
Spend T3.
Second pressure sensor is used to detect the gas pressure P2 at oxygen outlet end and is sent to controller, and controller will be adopted
The gas pressure P2 collected is compared with the second preset pressure, when collected gas pressure P2 exceeds the second preset pressure
When range, controller controls the second shutoff valve and closes.
For second temperature probe for detecting the temperature T2 at oxygen outlet and being sent to controller, controller will be collected
Temperature T2 is compared with the second preset temperature, when collected temperature T2 is higher than the second preset temperature, controller control the
Two shutoff valves are closed.
Optionally, the oxygen outlet end of oxygen supply rifle 5 is provided with the second shutoff valve and second pressure sensor, works as oxygen
When the gas pressure P2 that the second pressure sensor at the oxygen outlet end of gas supply rifle 5 detects is beyond the second preset pressure, then
Controller controls the second shutoff valve and closes.
Optionally, the oxygen outlet end of oxygen supply rifle 5 is provided with the second shutoff valve, and the oxygen of oxygen supply rifle 5 goes out
It is provided with second temperature probe at mouthful, the temperature T2 that the second temperature probe at the oxygen outlet of oxygen supply rifle 5 detects
When higher than the second preset temperature, then controller controls the second shutoff valve and closes.
Optionally, the oxygen outlet end of oxygen supply rifle 5 is provided with the second shutoff valve and second pressure sensor, oxygen
It supplies and is additionally provided with second temperature probe at the oxygen outlet of rifle 5, when the second pressure at the oxygen outlet end of oxygen supply rifle 5
When the gas pressure P2 that sensor detects exceeds the second pre-set pressure range, or at the oxygen outlet of oxygen supply rifle 5
The temperature T2 that detects of second temperature probe when being higher than the second preset temperature, then controller controls the second shutoff valve and closes.
In addition, due to oxygen supply and interrupt also need according in burner hearth 9 oxygen content and flue-gas temperature T3 controlled
System, therefore, be arranged in oxygen supply rifle 5 oxygen outlet end the second shutoff valve will also according in burner hearth 9 oxygen content and
Flue-gas temperature T3 is controlled.When the oxygen-containing numerical quantity or calculated value of oxygen content detector test in burner hearth 9 are higher than default value
When, or when the third temp probe in burner hearth 9 detects that flue-gas temperature T3 is higher than third preset temperature, then controller controls
Second shutoff valve is closed, to control the oxygen content and flue-gas temperature T3 in burner hearth 9.
It is provided with oxygen content testing instrument in burner hearth 9, for detecting the oxygen content in burner hearth 9, oxygen content testing instrument be will test
To oxygen-containing numerical quantity be sent to controller, collected oxygen-containing numerical quantity is compared by controller with default value, when adopting
When the oxygen-containing numerical quantity collected is higher than default value, controller controls the second shutoff valve and closes.
Third temp probe is additionally provided in burner hearth 9, for detecting the flue-gas temperature T3 in burner hearth 9, third temp probe
The flue-gas temperature T3 that will test is sent to controller, and controller carries out collected flue-gas temperature T3 and third preset temperature
Compare, when collected flue-gas temperature T3 is higher than third preset temperature, controller controls the second shutoff valve and closes.
The specific control logic of second shutoff valve can carry out appropriate adjustment according to actual needs.
Specifically, the one end for forming oxygen intake on oxygen supply rifle 5 is fixed by fixed plate 8, be formed as oxygen outlet
One end be located at the inside of secondary air channel 2, while being located at 6 outside of fixed frame.Oxygen supplies distribution position of the rifle 5 in fixed plate 8
Setting can appropriate adjustment according to actual needs.
The structure and connection relationship of the other component structure and connection relationship Yu embodiment two of burner in the present embodiment
Identical, details are not described herein.
Embodiment five
The burner of the present embodiment is to increase oxygen supply rifle 5, oxygen in the present embodiment on the basis of embodiment three
The setting position for supplying rifle 5 is identical as example IV.
The structure and connection relationship of the other component structure and connection relationship Yu embodiment three of burner in the present embodiment
Identical, details are not described herein.
Embodiment six
The burner of the present embodiment and embodiment two and embodiment three the difference is that, supply rifle with biomass fuel
Rifle 4 is supplied instead of powdered biomass, one end of biomass fuel supply rifle is formed as biomass fuel entrance, and the other end extends to
Burner outlet 7 is simultaneously formed as biomass fuel outlet, for timesharing conveying powdered biomass fuel or biomass gas combustion
Material.
Optionally, the center in First air channel 1, the i.e. axis of biomass fuel supply rifle is arranged in biomass fuel supply rifle
Line is overlapped with the axis in First air channel 1.
Optionally, the axis of biomass fuel supply rifle and the axis in First air channel 1 form the 4th angle.
Optionally, the angular range of the 4th angle is 0 °~30 °.
Optionally, the section of biomass fuel supply rifle includes but is not limited to circle.
Optionally, the diameter of section range of biomass fuel supply rifle is 1mm~200mm.
The low-load combustion-stabilizing of Large-scale fire-electricity unit boiler may be implemented since power plant uses renewable energy as fuel, make
It obtains power plant and obtains electricity price subsidy, and subsidize the usage amount that number is exactly foundation renewable energy and calculated.
In order to accurately measure the usage amount of powdered biomass, poweder flowmeter and powder are provided on biomass fuel supply rifle
Last concentration measuring apparatus realizes the measurable of powdered biomass, so as to calculate the subsidy number of renewable energy power generation.
In order to accurately measure the usage amount of biomass gas, biomass fuel supplies and is additionally provided with gas flowmeter on rifle,
The usage amount of biogas fluid fuel can be measured, accurately so as to calculate the subsidy number of renewable energy power generation.
In order to realize the flexible switching of biomass fuel Yu other fuel, control is additionally provided on biomass fuel supply rifle
Valve, to realize the supply and interruption of biomass fuel.
Due to being easy to produce tempering when biomass gas fuel combustion, there are security risks, therefore, biomass fuel supply
The biomass fuel outlet end of rifle is provided with third shutoff valve；The biomass fuel outlet end of biomass fuel supply rifle is also set
It is equipped with third pressure sensor, and/or, the biomass fuel exit of biomass fuel supply rifle is provided with the spy of the 4th temperature
Head.When biomass fuel supply rifle is used to convey biogas fluid fuel, when third pressure sensor detects biomass fuel
When supplying the gas pressure P3 in rifle lower than third preset pressure, or when the temperature T4 that the 4th temp probe detects is higher than
When four preset temperatures, then controller control third shutoff valve is closed, and for avoiding the generation of back-fire trouble, improves equipment
Safety.
Specifically, biomass fuel supply rifle for being controlled when conveying biogas fluid fuel in the following manner:
Third pressure sensor is used to detect the gas pressure P3 of biomass fuel outlet end and is sent to controller, controls
Collected gas pressure P3 is compared by device with third preset pressure, when collected gas pressure P3 is default beyond third
When pressure limit, controller controls third shutoff valve and closes.
4th temp probe is used to detect the temperature T4 in biomass fuel exit and is sent to controller, and controller will be adopted
The temperature T4 collected is compared with the 4th preset temperature, when collected temperature T4 is higher than four preset temperatures, controller
Third shutoff valve is controlled to close.
Optionally, the fuel outlet end of biomass fuel supply rifle is provided with third shutoff valve and third pressure sensing
Device, when third pressure sensor detects the gas pressure P3 in biomass fuel supply rifle lower than third preset pressure, then
Controller controls third shutoff valve and closes.
Optionally, the fuel outlet end of biomass fuel supply rifle is provided with third shutoff valve, biomass fuel supply
The 4th temp probe is provided at the fuel outlet of rifle, when the temperature T4 that the 4th temp probe detects is higher than the 4th preset temperature
When, then controller control third shutoff valve is closed.
Optionally, the fuel outlet end of biomass fuel supply rifle is provided with third shutoff valve and third pressure sensing
Device, biomass fuel supply rifle fuel outlet at be additionally provided with the 4th temp probe, when third pressure sensor detects life
When biomass fuel supplies the gas pressure P3 in rifle lower than third preset pressure, or work as the warm T4 that the 4th temp probe detects
When degree is higher than four preset temperatures, then controller control third shutoff valve is closed.
Oil gas supply rifle 3, powdered biomass supply rifle 4, oxygen supply rifle 5 and biomass fuel supply in the present invention
The combination of rifle includes but is not limited to above embodiment, and oil gas supplies rifle 3, powdered biomass supply rifle 4, oxygen and supplies rifle
5 and biomass fuel supply rifle can also otherwise be combined use as needed, to realize the supply of multi fuel
And burning.Oil gas supply rifle 3, powdered biomass supply rifle 4, oxygen supply rifle 5 and biomass fuel supply rifle respectively with it is right
The feeding pipe connection answered, and it is provided with control valve or flowmeter, the supply of pluralities of fuel and oxygen can be interrupted,
To realize the increase and decrease of supply fuel quantity and amount of oxygen, to realize the sufficient fuel flexibility of coal fired thermal power plant.
The present invention is directed to protect a kind of burner, it is applied in large-scale power station pulverized-coal fired boiler, is in existing large electric power plant
Stand coal burner structure basis on improve, on the First air of traditional coal powder fired boiler burner and the basis of Secondary Air
On, rifle, powdered biomass supply rifle, oxygen supply rifle and corresponding pipeline are supplied by increasing oil gas, is realized to existing big
The rebuilding at low cost of type pulverized-coal fired boiler, so that pulverized-coal fired boiler can neatly combusting heavy oil, light oil, biomass powder after transformation
The pluralities of fuels such as end, natural gas, hydrogen, biogas.Rifle is supplied by oil gas, powdered biomass supplies rifle, oxygen supplies rifle
Flexible combination use, realize real fuel flexibility, real fuel flexibility described herein refers to boiler not
With the period according to the supply and price situation of fuel, it can neatly adopt different fuel and carry out combustion power generation.Using this hair
Bright burner, so that the pulverized-coal fired boiler of traditional large thermal power plant can have burning other fuel, especially renewable energy
The function of fuel (powdered biomass or biogas or hydrogen), can reduce the carbon intensity of fired power generating unit, make power plant can
To enjoy the rate for incorporation into the power network of department's biomass power generation, increases power plant's income, power plant can also be made in the following carbon tax and tradable green certificates
The compulsory execution stage is on a good wicket in the competition of electricity market, is not only surfed the Internet electricity using renewable energy combustion power generation
Valence is high, and can to avoid by the carbon tax of collection great number, if generating power with biomass combustion future can apply for green electric power supply certificate,
Then thermal power plant's future can also obtain additional notable benefits by sale green electric power supply certificate.Especially biogas, hydrogen with
And the introducing of pure oxygen, the low-load combustion-stabilizing of Large-scale fire-electricity unit boiler may be implemented, to improve the negative of boiler at low load peak regulation
Lotus range increases the peak modulation capacity of fired power generating unit, by the annual depth peak regulation for participating in power grid, power plant is made to obtain peak regulation subsidy.
Meanwhile the utilization of the high-efficiency cleaning of biomass energy, the pollution that can be generated to avoid biomass such as domestic crop straw burnings increase agriculture
People's income.
The scheme that the present invention is implemented at present is transformed for traditional generating plant pulverized coal boiler, and future can also be directed to coal
Powder heating boiler carry out multi fuel burner transformation, including presently, there are a large amount of gas burners it is also contemplated that being added
Add the transformation of the multi fuels such as pure oxygen and biogas or fuel lance, these reforming modes belong to the protection scope of this patent.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (10)
1. a kind of burner characterized by comprising
Burner outlet (7), it includes one or more fuel outlets, for being connected to the burner hearth (9) of boiler, by a kind of or
Pluralities of fuel, which is transported in burner hearth (9), to burn；
First air channel (1) is provided with First air entrance on one end side wall, and the other end extends to the burner outlet (7)
And be formed as First air outlet；
Secondary air channel (2) is provided with Secondary Air entrance on one end side wall, and the other end extends to the burner outlet (7)
And be formed as Secondary Air outlet；
Oil gas supplies rifle (3), and one end is formed as oil gas entrance, and the other end extends to the burner outlet (7) and is formed as
Oil gas vent, for timesharing conveying liquid or gaseous fuel.
2. burner according to claim 1, which is characterized in that
The axis of oil gas supply rifle (3) and the axis of the First air channel (1) form the first angle, first angle
Angular range be 0 °~30 °.
3. burner according to claim 1, which is characterized in that
The oil gas vent end of oil gas supply rifle (3) is provided with the first shutoff valve；
The oil gas vent end of oil gas supply rifle (3) is additionally provided with first pressure sensor, and/or, the oil gas supplies rifle
(3) first temperature probe is provided at oil gas vent；
The first pressure sensor is used to detect the oil-air pressure P1 at oil gas vent end and is sent to controller, the controller
Collected oil pressure or air pressure P1 are compared with the first preset pressure, when collected oil pressure or air pressure P1 are pre- lower than first
If when pressure, the controller controls first shutoff valve and closes；
For the first temperature probe for detecting the temperature T1 at oil gas vent and being sent to the controller, the controller will
Collected temperature T1 is compared with the first preset temperature, described when collected temperature T1 is higher than the first preset temperature
Controller controls first shutoff valve and closes.
4. burner according to claim 1, which is characterized in that further include:
Powdered biomass supplies rifle (4), and one end is formed as powdering inlet, and the other end extends to the burner outlet (7) simultaneously
Be formed as dust outlet.
5. burner according to claim 4, which is characterized in that
The axis of powdered biomass supply rifle (4) is overlapped with the axis of the First air channel (1).
6. burner according to claim 4, which is characterized in that
The axis of powdered biomass supply rifle (4) and the axis of the First air channel (1) form the second angle, and described the
The angular range of two angles is 0 °~30 °.
7. burner according to claim 4, which is characterized in that further include:
Oxygen supplies rifle (5), and one end is formed as oxygen intake, and the other end extends to the burner outlet (7) and is formed as
Oxygen outlet, for introducing oxygen into the burner hearth (9).
8. burner according to claim 7, which is characterized in that
The axis of oxygen supply rifle (5) and the axis of the First air channel (1) form third angle, the third angle
Angular range be 0 °~30 °.
9. burner according to claim 7, which is characterized in that
The oxygen outlet end of oxygen supply rifle (5) is provided with the second shutoff valve；
The oxygen outlet end of oxygen supply rifle (5) is additionally provided with second pressure sensor, and/or, the oxygen supplies rifle
(5) second temperature probe is provided at oxygen outlet；
The second pressure sensor is used to detect the gas pressure P2 at oxygen outlet end and is sent to controller, the controller
Collected gas pressure P2 is compared with the second preset pressure, when collected gas pressure P2 is beyond the second default pressure
When power range, the controller controls second shutoff valve and closes；
For the second temperature probe for detecting the temperature T2 at oxygen outlet and being sent to the controller, the controller will
Collected temperature T2 is compared with the second preset temperature, described when collected temperature T2 is higher than the second preset temperature
Controller controls second shutoff valve and closes；
It is provided with oxygen content testing instrument in the burner hearth (9), for detecting the oxygen content in the burner hearth (9), the oxygen content
The oxygen-containing numerical quantity that detector will test is sent to the controller, and the controller is by collected oxygen-containing numerical quantity and in advance
If numerical value is compared, when collected oxygen-containing numerical quantity is higher than default value, controller control second cut-off
Valve is closed；
Third temp probe is additionally provided in the burner hearth (9), it is described for detecting the flue-gas temperature T3 in the burner hearth (9)
The flue-gas temperature T3 that third temp probe will test is sent to the controller, and the controller is by collected flue-gas temperature
T3 is compared with third preset temperature, when collected flue-gas temperature T3 is higher than third preset temperature, the controller control
Second shutoff valve is made to close.
10. burner according to claim 1 to 9, which is characterized in that
The First air channel (1), which is located on one end side wall on the outside of the furnace wall of the boiler, is provided with First air entrance；
The secondary air channel (2) is set in outside the First air outlet end of the First air channel (1).
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|---|---|---|---|
| CN201710792257.9A CN109424961A (en) | 2017-09-05 | 2017-09-05 | A kind of burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710792257.9A CN109424961A (en) | 2017-09-05 | 2017-09-05 | A kind of burner |
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| CN109424961A true CN109424961A (en) | 2019-03-05 |
Family
ID=65514153
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710792257.9A Pending CN109424961A (en) | 2017-09-05 | 2017-09-05 | A kind of burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160050A (en) * | 2019-06-05 | 2019-08-23 | 中国矿业大学 | A kind of biomass gasified gas and coal dust cofiring low NO |
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Application publication date: 20190305 |