CN106439795A - Oxygen-enriched burner and air distribution method thereof - Google Patents
Oxygen-enriched burner and air distribution method thereof Download PDFInfo
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- CN106439795A CN106439795A CN201610825794.4A CN201610825794A CN106439795A CN 106439795 A CN106439795 A CN 106439795A CN 201610825794 A CN201610825794 A CN 201610825794A CN 106439795 A CN106439795 A CN 106439795A
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- Prior art keywords
- oxygen
- air
- enriched
- distribution method
- enriched burner
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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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
-
- 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
- F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
-
- 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
-
- 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
- F23C2202/30—Premixing fluegas with combustion air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/32—Direct CO2 mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to the technical field of energy, and discloses an oxygen-enriched burner and an air distribution method thereof. The burner comprises a combustion chamber, wherein a burnout air port, primary air ports and secondary air ports are formed in the wall of the chamber so as to form a line of air ports, the primary air ports and the secondary air ports are vertically formed below the burnout air port in the height direction of the combustion chamber at intervals, and the primary air ports are located between adjacent secondary air ports. The air distribution method of the oxygen-enriched burner comprises the steps of closing the burnout air port, and opening the primary air ports and the secondary air ports in the working condition of oxygen-enriched combustion; adjusting the volume of circulating smoke which enters a boiler and injected oxygen so as to adjust the oxygen partial pressure of the boiler; controlling a part of the injected oxygen to enter the primary air ports and the other part of the injected oxygen to enter the secondary air ports, and adjusting the oxygen partial pressure of primary air or secondary air; and controlling the momentum of the primary air to be the same as that of the primary air in the working condition of air combustion. According to the oxygen-enriched burner and the air distribution method, the high efficiency and stability of pulverized coal combustion are increased in the working condition from air combustion to oxygen-enriched combustion.
Description
Technical field
The present invention relates to energy technology field, in particular it relates to a kind of oxygen-enriched burner and its air distribution method.
Background technology
Burner is the primary combustion equipment of pulverized-coal fired boiler, its effect be by fuel and burning needed for combustion adjuvant by certain
Ratio, speed and hybrid mode send into burner hearth through the spout that burns, it is ensured that fuel can be fully mixed with combustion adjuvant after burner hearth is entered
Close, catch fire in time, stably burning and after-flame.Its rational tissue gas stream in the stove is the precondition of coal dust stability and high efficiency burning.
Burner is divided into two big class by its exit flow characteristic, and it is direct jet that a class is DC burner, exit flow
Group.Another kind of for turbulent burner, exit flow be.DC burner is generally by one or more groups of rectangles or circle
Spout composition, its First air and secondary wind are all the direct jets of not eddy flow.Which can be arranged in burner hearth corner, roof of the furnace
Or the arcuate part in the middle part of burner hearth, so as to form corner tangential firing, U-shaped flame combustion and W type flame combustion mode.
However, for the boiler using DC burner, when air burning operating mode is switched to oxygen-enriched combusting operating mode,
Entering the volume of the gas (circulating flue gas and oxygen) of boiler and component under oxygen-enriched combusting operating mode is all had with air burning operating mode
Larger difference.For example, compared with air burning operating mode, under oxygen-enriched combusting operating mode, the gas volume for entering boiler declines 10
～30%, CO in gas volume2Contained ratio is more than 60%, and the average oxygen partial pressure of gas is about 23～30%.Due to entering
The gas volume of boiler and the change of component, if still using the air distribution method for using under air burning operating mode, flow field can occur
Very big change, it is difficult to form good Furnace Aerodynamic Field, so as to cause the unstable of burning.Meanwhile, in existing combustion
The matching method of oxygen in First air and secondary wind is not related in the air distribution method of burner.Further, since adopting existing combustion
The burning that the air distribution method of burner causes is insufficient, improves CO concentration in oxygen-enriched combusting stove, and wall reducing atmosphere strengthens, also
It is easily caused slagging scorification, the high temperature corrosion of water-cooling wall.
The present invention is in place of the deficiencies in the prior art, it is proposed that a kind of oxygen-enriched burner and its air distribution method, to improve
High efficiency and stability that coal dust is burnt under oxygen-enriched combusting operating mode is switched to.
Content of the invention
The present invention proposes a kind of oxygen-enriched burner and its air distribution method, is being switched to oxygen-enriched combusting operating mode to improve coal dust
The high efficiency and stability of lower burning.
According to a kind of oxygen-enriched burner that the present invention is provided, including combustion chamber, combustion in the cavity wall of combustion chamber, is formed with
Air port, and the vertically spaced First air in the short transverse of combustion chamber below burnout degree mouth to the greatest extent
Mouth and overfiren air port, to form string air port, primary air nozzle is Wei Yu adjacent overfiren air port between.
Preferably, oxygen-enriched burner is formed with multiple row air port, and circumference is uniform；Per in string air port, primary air nozzle
Number is even number, and the number of overfiren air port is odd number.
A kind of air distribution method of the oxygen-enriched burner for being provided according to the present invention, including：
Step one：Under oxygen-enriched combusting operating mode, after-flame air port is closed, keep primary air nozzle and overfiren air port to open；
Step 2：The volume of the circulating flue gas in boiler and the oxygen of injection is adjusted into, to adjust into stove partial pressure of oxygen；
Step 3：The oxygen for being injected in rate-determining steps two is partly into primary air nozzle, and another part enters secondary wind
Mouthful, and adjust the partial pressure of oxygen of First air or the partial pressure of oxygen of secondary wind；
Step 4：Control First air momentum with air burning operating mode once the momentum of wind identical.
Preferably, also include between step one and step 2：Oxygen quotient excessively under adjustment oxygen-enriched combusting operating mode.
Preferably, cross oxygen quotient be 1.10 to 1.30 between.
Preferably, enter stove partial pressure of oxygen between 0.23 to 0.30 in step 2.
Preferably, the partial pressure of oxygen of the First air in step 3 be 0.10 to 0.3 between.
Preferably, the air distribution method of oxygen-enriched burner also includes：Step 5：Secondary in the overfiren air port of adjustment lowermost end
The momentum of wind is more than or equal to the momentum of secondary wind under air burning operating mode.
Preferably, secondary wind is deflected outward by with respect to First air, and the jet-core region line of First air and penetrating for secondary wind
The angle α of stream centrage is 5 ° to 15 °.
Preferably, the air distribution method of oxygen-enriched burner also includes：Under air burning operating mode, after-flame air port is opened.
The oxygen-enriched burner of the present invention and its air distribution method effectively can change combustion atmosphere of the pulverized coal particle in stove,
The time of staying, the discharge for improving flow field and flame profile, reducing ignition lag, raising after-flame degree and reduction pollutant, from
And realize stable, efficient and safe burning of the coal dust under oxygen-enriched combusting operating mode.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the structural representation of the oxygen-enriched burner according to the present invention；
Fig. 2 is the top view of the structure of the oxygen-enriched burner according to the present invention shown in Fig. 1；
Fig. 3 is the schematic diagram of the air distribution method of the oxygen-enriched burner according to the present invention.
Description of reference numerals
1 primary air nozzle, 2 overfiren air port
The jet-core region line of 3 after-flame air port, 11 First air
4 air separator of jet-core region line of 21 secondary wind
5 boiler A oxygen
A1 Part I oxygen a2 Part II oxygen
B flue gas recycled b1 Part I circulating flue gas
B2 Part II circulating flue gas
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment that states is merely to illustrate and explains the present invention, is not limited to the present invention.
It is related to following term in the present invention：
Cross oxygen quotient：Refer to that amount of oxygen that conversion supplied to per unit coal dust and per unit coal dust burn required oxygen completely
The ratio of tolerance；
Oxygen：Refer to purity in 95% (volume share) and above higher degree oxygen；
Flue gas recycled：Refer to the flue gas being recycled in boiler from cleaner unit or flue gas condenser；
Flue gas recycling rate：Refer to the ratio of circulating flue gas total volumetric flow rate and furnace outlet wet flue gas total volumetric flow rate；
Enter stove partial pressure of oxygen：Fingering enter burner hearth total oxygen volume A and flue gas recycled volume B and total oxygen volume A it
The ratio of sum, i.e. A/ (A+B).
Fig. 1 shows a kind of structural representation of the oxygen-enriched burner for providing according to the present invention.The oxygen-enriched burner includes
Combustion chamber, is formed with after-flame air port 3, and is located at burnout degree in the short transverse of combustion chamber in the cavity wall of combustion chamber
The vertically spaced primary air nozzle 1 of 3 lower section of mouth and overfiren air port 2, to form string air port, primary air nozzle 1
Between adjacent overfiren air port 2.
The oxygen-enriched burner of the present invention is by primary air nozzle 1 and overfiren air port 2 to be intervally installed, and primary air nozzle
1 is always positioned between adjacent overfiren air port 2, so that what the secondary wind that overfiren air port 2 sprays was sprayed to primary air nozzle 1 all the time
First air forms certain effect of lifting, and as First air enters fashionable usual carrying coal dust, the therefore setting takes can First air
The coal dust firing of band is more abundant.Meanwhile, in the present invention, if primary air nozzle 1 overfiren air port 2 corresponding with constitutes
One burning zone, then the oxygen-enriched burner of the present invention include multiple burning zones, in each burning zone, coal dust can all be stablized
Fully burn, so as to greatly increase high efficiency and the stability of coal dust firing.
Preferably, in conjunction with shown in Fig. 2, oxygen-enriched burner is formed with multiple row air port, and circumference is uniform；In per string air port,
The number of primary air nozzle 1 is even number, and the number of overfiren air port 2 is odd number.By the setting, the coal dust that First air is carried is complete
Surrounded by secondary wind entirely, can further improve high efficiency and the stability of coal dust firing.
The invention allows for a kind of air distribution method of oxygen-enriched burner, including：
Step one：Under oxygen-enriched combusting operating mode, after-flame air port 3 is closed, keep primary air nozzle 1 and overfiren air port 2 to open；
Step 2：The volume of the circulating flue gas in boiler and the oxygen of injection is adjusted into, to adjust into stove partial pressure of oxygen；
Step 3：The oxygen for being injected in rate-determining steps two is partly into primary air nozzle 1, and another part enters secondary wind
Mouth 2, and adjust the partial pressure of oxygen of First air or the partial pressure of oxygen of secondary wind；
Step 4：Control First air momentum with air burning operating mode once the momentum of wind identical.
In conjunction with shown in Fig. 3, in the air distribution method of the oxygen-enriched burner according to the present invention, air separator 4 is isolated
Oxygen A be divided into Part I oxygen a1 and Part II oxygen a2, the flue gas recycled B by boiler 5 out is divided into first
Part circulating flue gas b1 and Part II circulating flue gas b2, Part I oxygen a1 are mixed to form with Part I circulating flue gas b1
First air is simultaneously entered in boiler by primary air nozzle 1, and Part II oxygen a2 is mixed to form two with Part II circulating flue gas b2
Secondary wind is simultaneously entered in boiler by overfiren air port 2.Preferably, when forming First air, for unit pulverized-coal system, can be in coal-grinding
Part I oxygen a1 is injected before machine or after coal pulverizer；For the ball type pulverizer system, need to be after coal pulverizer, air and powder mixer
Front injection Part I oxygen a1.The present invention is by being designed to the parameters in First air and secondary wind and adjusting, example
Such as momentum of the partial pressure of oxygen of First air or secondary wind, First air or secondary wind etc., achievable coal dust is steady under oxygen-enriched combusting operating mode
Fixed, efficient and safe burning.
According to the present invention, in step one, due to air quantity abundance under air burning operating mode, an air air quantity part passes through
Primary air nozzle 1 and overfiren air port 2 are entered, and remaining air quantity is entered by after-flame air port 3, and is cut in the case that thermic load is constant
When changing to oxygen-enriched combusting operating mode, air quantity can reduce a lot, therefore now close after-flame air port 3, allow whole air quantity by First air
Mouth 1 and overfiren air port 2 are entered.
Preferably, also include between step one and step 2：Oxygen quotient excessively under adjustment oxygen-enriched combusting operating mode.It is preferred that
Ground, cross oxygen quotient be 1.10 to 1.30 between.
It is further preferred that entering stove partial pressure of oxygen between 0.23 to 0.30 in step 2.This enters stove partial pressure of oxygen can be by adjustment
Flue gas recycling rate is being adjusted.It is further preferred that the partial pressure of oxygen of the First air in step 3 is between 0.10 to 0.3,
On the basis of the concrete numerical value of partial pressure of oxygen of stove partial pressure of oxygen and First air is determined, the partial pressure of oxygen of secondary wind is with the oxygen of First air
The change of the value of partial pressure and change.
According to the present invention, step 3 is used for for oxygen being divided into two parts and is mixed with flue gas recycled, one part and part
Flue gas recycled mixing after as burner First air；Another part is mixed as burner with remaining flue gas recycled
Secondary wind.Preferably, secondary wind can include one or more in surrounding air, sandwich wind, adherent wind and burnout degree.
According to the present invention, step 4 is used for the transportation safety for ensureing coal dust and the stability that catches fire.Preferably, in First air
Momentum keep constant in the case of, the speed that can accordingly adjust oxygen-enriched combusting operating mode wind next time is next compared with air burning operating mode
The speed of secondary wind declines 10%-20%, can further improve the stability of coal dust firing.
Additionally, according to the present invention, the air distribution method of oxygen-enriched burner also includes step 5：The overfiren air port of control lowermost end
The momentum of the secondary wind in 2 is more than or equal to the momentum of secondary wind under air burning operating mode, it is preferable that the secondary wind of lowermost end
The momentum of the secondary wind in mouth 2 is more than the momentum of secondary wind under air burning operating mode, to strengthen lifting for least significant end secondary wind
Effect.
Preferably, when using anthracite or meager coal as coal dust, the momentum of adjustable primary wind and the momentum of secondary wind
Than between 3 to 4.2.It is further preferred that using the momentum of First air during anthracite and secondary wind ratio of momentum be 1.5 to
Between 3.5, using the ratio of momentum of the momentum of First air during coal dust and secondary wind it is between 2 to 3.
According to the present invention, it is preferably carried out in scheme at one, as shown in Fig. 2 secondary wind is outwards inclined with respect to First air
Turn, and the jet-core region line 11 of First air is 5 ° to 15 ° with the angle α of the jet-core region line 21 of secondary wind.The setting passes through
Reduce the tangential circle diameter of First air, secondary wind is deflected outward by 5～15 ° with respect to First air, so as in First air and burner hearth water
One layer of wind film is formed between cold wall, reach the effect of bellows chamber powder.Meanwhile, adherent wind also add by the setting, make water-cooling wall
Neighbouring reducing atmosphere reduces, and restrained effectively high temperature corrosion and the slagging scorification phenomenon of water-cooling wall.
In sum, the oxygen-enriched burner of the present invention and its air distribution method can effectively change pulverized coal particle in stove
Combustion atmosphere, the time of staying, improve flow field and flame profile, reduce ignition lag, improve after-flame degree and reduce pollutant
Discharge, so as to realize stable, efficient and safe burning of the coal dust under oxygen-enriched combusting operating mode.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, multiple letters can be carried out to technical scheme
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy is no longer separately illustrated.
Additionally, combination in any can also be carried out between a variety of embodiments of the present invention, as long as which is without prejudice to this
The thought of invention, which should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of oxygen-enriched burner, including combustion chamber, it is characterised in that be formed with burnout degree in the cavity wall of the combustion chamber
Mouth (3), and be located in the short transverse of combustion chamber vertically spaced below after-flame air port (3)
Primary air nozzle (1) and overfiren air port (2), to form string air port, described primary air nozzle (1) is located at the adjacent overfiren air port
(2) between.
2. oxygen-enriched burner according to claim 1, it is characterised in that the oxygen-enriched burner is formed with multiple row air port,
And circumference is uniform；
In per string air port, the number of primary air nozzle (1) is even number, and the number of overfiren air port (2) is odd number.
3. a kind of air distribution method of oxygen-enriched burner, including：
Step one：Under oxygen-enriched combusting operating mode, after-flame air port (3) is closed, keep primary air nozzle (1) and overfiren air port (2) to open；
Step 2：The volume of the circulating flue gas in boiler and the oxygen of injection is adjusted into, to adjust into stove partial pressure of oxygen；
Step 3：The oxygen for being injected in rate-determining steps two is partly into the primary air nozzle (1), and another part enters described
Overfiren air port (2), and adjust the partial pressure of oxygen of First air or the partial pressure of oxygen of secondary wind；
Step 4：Control the momentum of the momentum of First air in the primary air nozzle (1) and once wind in air burning operating mode
Identical.
4. the air distribution method of oxygen-enriched burner according to claim 3, it is characterised in that in the step one and the step
Also include between rapid two：Oxygen quotient excessively under adjustment oxygen-enriched combusting operating mode.
5. the air distribution method of oxygen-enriched burner according to claim 4, it is characterised in that described cross oxygen quotient be 1.10 to
1.30 between.
6. the air distribution method of oxygen-enriched burner according to claim 5, it is characterised in that enter stove oxygen in the step 2
Partial pressure be 0.23 to 0.30 between.
7. the air distribution method of oxygen-enriched burner according to claim 6, it is characterised in that the First air in the step 3
Partial pressure of oxygen be 0.10 to 0.3 between.
8. the air distribution method of oxygen-enriched burner according to claim 3, it is characterised in that the air distribution of the oxygen-enriched burner
Method also includes：
Step 5：The momentum of the secondary wind in the overfiren air port of adjustment lowermost end is more than or equal under air burning operating mode
The momentum of secondary wind.
9. the air distribution method of oxygen-enriched burner according to claim 8, it is characterised in that secondary wind is with respect to a wind direction
Extrinsic deflection, and the jet-core region line (11) of the First air is 5 ° with the angle α of the jet-core region line (21) of the secondary wind
To 15 °.
10. the air distribution method of oxygen-enriched burner according to claim 3, it is characterised in that the joining of the oxygen-enriched burner
Wind method also includes：
Under air burning operating mode, after-flame air port (3) are opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825794.4A CN106439795A (en) | 2016-09-14 | 2016-09-14 | Oxygen-enriched burner and air distribution method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825794.4A CN106439795A (en) | 2016-09-14 | 2016-09-14 | Oxygen-enriched burner and air distribution method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106439795A true CN106439795A (en) | 2017-02-22 |
Family
ID=58168318
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610825794.4A Pending CN106439795A (en) | 2016-09-14 | 2016-09-14 | Oxygen-enriched burner and air distribution method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260299A (en) * | 2019-05-29 | 2019-09-20 | 华中科技大学 | Supercritical carbon dioxide coal-burning boiler and its multi-stage flue gas method for recycling |
| CN114110569A (en) * | 2021-09-28 | 2022-03-01 | 清华大学 | Combustion system and combustion method of intermediate storage type pulverized coal fired boiler |
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| US20030091948A1 (en) * | 2001-01-11 | 2003-05-15 | Bool Lawrence E. | Combustion in a multiburner furnace with selective flow of oxygen |
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| CN103615713A (en) * | 2013-11-28 | 2014-03-05 | 华中科技大学 | Method and system thereof for oxygen-enriched flameless combustion of coal powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110260299A (en) * | 2019-05-29 | 2019-09-20 | 华中科技大学 | Supercritical carbon dioxide coal-burning boiler and its multi-stage flue gas method for recycling |
| CN114110569A (en) * | 2021-09-28 | 2022-03-01 | 清华大学 | Combustion system and combustion method of intermediate storage type pulverized coal fired boiler |
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