CN106871110B - Low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires system - Google Patents
Low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires system Download PDFInfo
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- CN106871110B CN106871110B CN201710037927.6A CN201710037927A CN106871110B CN 106871110 B CN106871110 B CN 106871110B CN 201710037927 A CN201710037927 A CN 201710037927A CN 106871110 B CN106871110 B CN 106871110B
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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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
- F23C7/06—Disposition of air supply not passing through burner for heating the incoming air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
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- 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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Abstract
The invention discloses a kind of low ignition heat ultra-low load steadies for thermal power plant's unit pulverized-coal system to fire system.The present invention is in former thermal power plant's unit pulverized-coal system unit boiler, for original powder and combustion system, after coal pulverizer, low ignition heat combustion system and hot wind for combustion supporting system are increased newly to reduce ignition heat of the boiler under ultra-low load, cooperates operation under unit different load by two systems, guarantee is run under high loads, it does not have a negative impact to unit, when running under excess load, the safe and stable operation burning of unit may be implemented, the safety for guaranteeing unit, improves the flexibility of unit.
Description
Technical field
The present invention relates to a kind of low ignition heat ultra-low load steadies for thermal power plant's unit pulverized-coal system to fire system, is used for
Boiler of the fired power generating unit in Ultra-low load operation is surely fired, to improve safety and stability fortune of the power station unit under ultra-low load
Row ability ensures the safety of unit boiler, belongs to power station technology field.
Background technique
In recent years, China's wind-powered electricity generation and photovoltaic installation scale rapidly increase, in-service and occupied the world building installed capacity
First.On the one hand, the new energy such as wind-powered electricity generation and photovoltaic are that we provide a large amount of clean electric powers, on the other hand, generated output
Randomness and unstability also bring huge challenge to the safe operation of electric system and power supply guarantee.From current feelings
From the point of view of condition, China's electric system regulating power is difficult to adapt to the requirement of new energy extensive development and consumption, some areas completely
There is more serious abandonment, abandon light and abandons water problems.2015, annual abandonment electricity was up to 33,900,000,000 kilowatt hours, " three Norths "
Some areas abandonment and abandoning light rate are more than 20%.And thermoelectricity especially coal motor group, it is still me in following considerably long one period
Main force's power supply in state " three Norths " area.By discharging its potential flexibility to coal electricity Transformation of Unit, China's electricity can be effectively improved
Force system regulating power is the important content that China promotes high efficiency smart electric system construction.
Thermal Power Enterprises situation for facing in the country's is that 6000 kilowatts of the whole nation in 2015 and the above thermal power generating equipment averagely utilize at present
4329 hours hours, it is contemplated that continue to decline to a great extent during " 13 ".Multinomial major reform has been put into effect successively and has been lifted in center
The file arranged proposes the flexibility transformation of fired power generating unit, it is desirable that unit participates in depth peak regulation, and promotion flexibility transformation is expected will
Increase thermoelectricity unit by the peak modulation capacity of 20% rated capacity, minimum technology power output reaches 40%-50% rated capacity；Pure condensate machine
Group increases the peak modulation capacity of 15%-20% rated capacity, and minimum technology power output reaches 30%-35% rated capacity.Part has
Power plant's expection of transformation condition is reached advanced world standards, and pure condensate operating condition minimum technology power output reaches when unit does not throw oily steady combustion
20%-25%.
Thermoelectricity operational flexibility includes: several major parts such as fuel-flexible, peak modulation capacity, Ramp Rate, start-stop time.
In in terms of these, the most lacking is the promotion of peak modulation capacity at present.When unit is in Ultra-low load operation, such as Peak Load
Under rate reaches 20%, the problems such as a series of problems being generated to unit safety operation, be related to burning, carbonated drink, environmental protection, subsidiary engine, and
In this series of problems, it is most important that the stable combustion problem of boiler under ultra-low load, when the combustion conditions of boiler are far below design
Minimum stable operating load when, the temperature of burner hearth can sharply decline, cause the quick ignition of coal dust to encounter difficulties, and then cause
Flame holding is poor, is easy to happen flame-out, and stove chamber fire-extinguishing blows out equal major safety risks.Therefore, realize that fired power generating unit is ultralow negative
Lotus safe and stable operation needs to provide safely and effectively boiler ultra-low load stable combustion technology.
By taking current 600MW unit as an example, which is the unit with medium-speed pulverizer unit pulverized-coal system.Such as Fig. 1
Shown, coal dust enters metering system 2 by run coal bin 1, enters back into feeder 3, is entered in coal pulverizer 4 by feeder 3 to coal and entered
Pulverized coal preparation, at the same time, primary and secondary air cold air become heat primary air and hot Secondary Air, heat primary air after entering air preheater 9
All enter by heat primary air road 6 and by the cold First air without air preheater 9 in a cold air duct 7 dry in coal pulverizer 4
Coal dust, the primary air powder mixture come out from coal pulverizer 4 enters in main burner 11 by primary air powder mixture pipeline 5 to be carried out
Burning, hot Secondary Air enter 11 aftercombustion of main burner, while the extracting part from hot secondary air duct 8 by hot secondary air duct 8
Divide hot Secondary Air to enter burnout degree region 12 and carries out fractional combustion.Whole system ultra-low load lower hearth temperature can sharply under
Drop, causes the quick ignition of coal dust to encounter difficulties, and then it is poor to cause flame holding, is easy to happen flame-out, stove chamber fire-extinguishing is blown out
Equal major safety risks.The machine set system maximum can only accomplish not throwing oil under 30%BMCR or 35%BMCR load and can tie up at present
It keeps steady and determines burning, be unable to satisfy ultra-low load (20%BMCR) and do not throw oil and Stable Combustion Technology can be maintained to require.
Summary of the invention
It does not have a negative impact to unit the technical problem to be solved by the present invention is providing a kind of run under high loads
And the low kindling for thermal power plant's unit pulverized-coal system of unit safety operation burning may be implemented in operation under excess load
Hot ultra-low load steady fires system, and solving traditional fired power generating unit can sharply decline in ultra-low load lower hearth temperature, lead to coal
The quick ignition of powder encounters difficulties, and then it is poor to cause flame holding, is easy to happen flame-out, and stove chamber fire-extinguishing blows out equal considerable safeties
The problem of hidden danger.
In order to solve the above-mentioned technical problem, thermal power plant's blowing powder producing is used for the technical solution of the present invention is to provide a kind of
The low ignition heat ultra-low load steady of system fires system, including run coal bin, and run coal bin connects feeder, feeder by metering system
Connect coal pulverizer, the outlet end of coal pulverizer be separately connected primary air powder mixture pipeline, heat primary air road, a cold air duct one
End, the other end of primary air powder mixture pipeline connect main burner, heat primary air road, a cold air duct the other end connect respectively
Hot-blast outlet end, the cold wind outlet end of air preheater are connect, the hot-blast outlet end of air preheater also connects main burning by hot secondary air duct
Device, main burner are set on burner hearth, and furnace outlet terminates logical air preheater, and burner hearth is equipped with burnout degree region, which is characterized in that institute
The steady combustion separator input end of primary air powder mixture pipeline connection for the coal pulverizer outlet end stated is steady to fire separator flour extraction end and go out
Low ignition heat combustion system and hot wind for combustion supporting system is respectively set in gas end.
Preferably, the low ignition heat combustion system includes steady coal-fired bucket, and it is steady coal-fired surely to fire the connection of separator flour extraction end
Struggle against input end, and low ignition heat wind powder pipe road is connected in steady coal-fired bucket outlet end, and heat primary air is connected in low ignition heat wind powder pipe road one end
Road, the low ignition heat wind powder pipe road other end connect the upper layer burner of main burner, and hot wind for combustion supporting system includes hot wind for combustion supporting combustion
Burner, steady separator outlet side of firing pass through hot wind for combustion supporting pipeline connection hot wind for combustion supporting burner.
A kind of working method of the low ignition heat ultra-low load steady combustion system for thermal power plant's unit pulverized-coal system, including
Following steps: coal dust enters metering system by run coal bin, enters back into feeder, is entered by feeder to coal and enters coal in coal pulverizer
Powder preparation, at the same time, primary and secondary air cold air become heat primary air and hot Secondary Air after entering air preheater, and heat primary air is logical
It crosses heat primary air road and dry coal dust in coal pulverizer is all entered by the cold First air without air preheater in a cold air duct, from
The primary air powder mixture that coal pulverizer comes out enters in main burner by primary air powder mixture pipeline burns, and heat is secondary
Wind enters main burner aftercombustion by hot secondary air duct, while extracting hot Secondary Air from hot secondary air duct and entering burnout degree
Region carries out fractional combustion, which is characterized in that further comprising the steps of:
Step 1: unit under being more than or equal to current minimum steady combustion load when running, by the primary of coal pulverizer outlet end
Primary air powder mixture is extracted on wind powder mixture pipeline is sent into steady combustion separator；
Step 2: primary air powder mixture carries out the separation of air and coal dust in surely combustion separator, and the coal dust after separation is logical
It crosses coal spout and is stored at the steady coal-fired bucket being located at below steady combustion separator, the coal dust carried in isolated air passes through surely combustion separation
Device top hot wind for combustion supporting pipeline feeding be arranged in boiler primary combustion zone and the hot wind for combustion supporting burner in burnout degree region into
Row burning, hot wind for combustion supporting system work, and low ignition heat combustion system stops；
Step 3: unit still runs work in the case where being more than or equal to current minimum steady combustion load, the coal dust amount in steady coal-fired bucket
When reaching maximum and requiring, stop extracting wind powder, low ignition heat combustion system and hot wind for combustion supporting system from primary air powder mixture
All stop working；
Step 4: when running under lower than current minimum steady combustion load, the coal dust come out from coal pulverizer fully enters surely unit
The separation that wind powder is carried out in separator is fired, to the primary air powder mixture closedown of pipeline of main burner, while from heat primary air road
Upper extraction First air conveying is burnt out from the upper layer burner that the coal dust that steady fire coal struggles against enters main burner, low ignition heat
Combustion system work；
Step 5: steady combustion separator is still firing working under load lower than current minimum steady, the separation come out from steady combustion separator
The coal dust carried in air is arranged by surely firing the hot wind for combustion supporting pipeline on separator top and being sent into boiler primary combustion zone and combustion
It burns in the hot wind for combustion supporting burner in wind region to the greatest extent, hot wind for combustion supporting system works.
The present invention is in former thermal power plant's unit pulverized-coal system unit boiler, for original powder and combustion system, in coal-grinding
After machine, low ignition heat combustion system and hot wind for combustion supporting system are increased newly to reduce ignition heat of the boiler under ultra-low load, passes through two
A system cooperates operation under unit different load, and guarantee runs under high loads, do not have a negative impact to unit, super negative
When being run under lotus, the safe and stable operation burning of unit may be implemented, guarantee the safety of unit, improve the flexibility of unit.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is burnt by the way that power plant's unit pulverized-coal system unit boiler stablizing under ultra-low load may be implemented.
2, invention increases hot wind for combustion supporting systems, and under load near minimum steady combustion load, the combustion characteristics of boiler becomes
It is better than in the past to obtain.
Detailed description of the invention
Fig. 1 is thermal power unit boiler powder and combustion system figure before being transformed；
Fig. 2 is the schematic diagram that system is fired for the low ignition heat ultra-low load steady of thermal power plant's unit pulverized-coal system.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.It should be understood that
These examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.In addition, it should also be understood that, having read the present invention
After the content of instruction, those skilled in the art can make various modifications or changes to the present invention, and such equivalent forms are equally fallen
In the scope of the appended claims of the present application.
The present invention is a kind of low ignition heat ultra-low load steady combustion system for thermal power plant's unit pulverized-coal system, is used for pot
Steady combustion of the furnace under ultra-low load, as shown in Fig. 2, it includes two systems: low ignition heat combustion system and hot wind for combustion supporting system.
In former boiler powder and combustion system, extraction section flue gas enters on the primary wind and powder mixing duct 5 of 4 outlet end of coal pulverizer
Newly-increased steady combustion separator 13, is respectively set low ignition heat combustion system and hot wind for combustion supporting system later.
I.e. run coal bin 1 connects feeder 3 by metering system 2, and feeder 3 connects coal pulverizer 4, the outlet end of coal pulverizer 4
Be separately connected primary air powder mixture pipeline 5, heat primary air road 6, a cold air duct 7 one end, primary air powder mixture pipeline 5
The other end connect main burner 11, heat primary air road 6, a cold air duct 7 the other end be separately connected the hot wind of air preheater 9 and go out
Mouth end, cold wind outlet end, the hot-blast outlet end of air preheater 9 also pass through hot secondary air duct 8 and connect main burner 11, main burner 11
On burner hearth 10, air preheater 9 is connected in 10 outlet end of burner hearth, and burner hearth 10 is equipped with burnout degree region 12,4 outlet end of coal pulverizer
Primary air powder mixture pipeline 5 connects steady combustion 13 input end of separator, and low ignition heat combustion system includes steady coal-fired bucket 14, steady to fire
13 flour extraction end of separator connection, 14 input ends of steady coal-fired bucket, steady coal-fired bucket 14 are located at steady 13 lower section of combustion separator, steady coal-fired bucket 14
Low ignition heat wind powder pipe road 15 is connected in outlet end, and heat primary air road 6, low kindling hot wind are connected in 15 one end of low ignition heat wind powder pipe road
15 other end of powder pipeline connects the upper layer burner of main burner 11, and hot wind for combustion supporting system includes hot wind for combustion supporting burner 17, surely
It fires 13 outlet side of separator and hot wind for combustion supporting burner 17 is connected by hot wind for combustion supporting pipeline 16.
The coal dust after separating is come out from steady combustion separator 13 and enters steady coal-fired bucket 14, from extraction section on heat primary air road 6
Heat primary air conveys the upper layer burner that coal dust enters main burner 11 in steady coal-fired bucket 14 and burns, constitutes low ignition heat
Combustion system.Low ignition heat combustion system include steady combustion separator 13, steady coal-fired bucket 14, steady burning burner and link pipeline and
Its attachment such as flapper, reversal valve, packing auger, control valve etc..
The separation air come out from steady combustion separator 13 carries a small amount of coal dust and is helped by surely firing the hot wind on 13 top of separator
The combustion feeding of pipeline 16, which is arranged in boiler primary combustion zone and the hot wind for combustion supporting burner 17 in burnout degree region, burns, and constitutes
Hot wind for combustion supporting system.Hot wind for combustion supporting system includes combustion-supporting nozzle, combustion-supporting bellows and connecting pipe and its attachment such as control valve etc..
Using certain power plant 600MW super critical boiler of Harbin Boiler Plant production as object.For thermal power plant's blowing powder producing
The working method of the low ignition heat ultra-low load steady combustion system of system, operating procedure are as follows:
Coal dust by run coal bin 1 enter metering system 2, enter back into feeder 3, by feeder 3 to coal enter in coal pulverizer 4 into
Enter pulverized coal preparation, at the same time, primary and secondary air cold air becomes heat primary air and hot Secondary Air after entering air preheater 9, and heat is primary
Wind all enters dry in coal pulverizer 4 by heat primary air road 6 and by the cold First air without air preheater 9 in a cold air duct 7
Dry coal dust, from coal pulverizer 4 come out primary air powder mixture by primary air powder mixture pipeline 5 enter main burner 11 in into
Row burning, hot Secondary Air enters 11 aftercombustion of main burner by hot secondary air duct 8, while extracting from hot secondary air duct 8
Hot Secondary Air enters burnout degree region 12 and carries out fractional combustion, further comprising the steps of:
Step 1: the unit is run under high load capacity (be more than or equal to current minimum steady and fire load, which is 35%BMCR)
When, by the primary air powder mixture for extracting 10% on 64 DEG C of primary air powder mixture pipeline 5 of former 4 outlet end of coal pulverizer
It is sent into steady combustion separator 13；
Step 2: primary air powder mixture carries out the separation of air and coal dust, the coal dust after separation in surely combustion separator 13
The steady coal-fired bucket 14 for being located at steady 13 lower section of combustion separator is stored at by coal spout, isolated air is 64 DEG C, carries a small amount of coal
Boiler primary combustion zone and burnout degree region is arranged in by surely firing the hot wind for combustion supporting pipeline 16 on 13 top of separator and being sent into powder
It burns in hot wind for combustion supporting burner 17, hot wind for combustion supporting system works, and low ignition heat combustion system stops；
Step 3: unit still runs work under high loads, when the coal dust amount in steady coal-fired bucket 14, which reaches maximum, to be required
(system is 120t/h), stops extracting wind powder, low ignition heat combustion system and hot wind for combustion supporting system from primary air powder mixture
System all stops working；
Step 4: when unit is run under ultra-low load (firing load lower than current minimum steady, which is 35%BMCR), from
The coal dust that coal pulverizer 4 comes out fully enters the separation that wind powder is carried out in steady combustion separator 13, to the primary wind and powder of main burner 11
Mixture conduit 5 is closed, while the First air conveying for being 320 DEG C from extraction section wind-warm syndrome on heat primary air road 6 struggles against from steady fire coal
The upper layer burner that 14 coal dusts come out enter main burner 11 burns, low ignition heat combustion system work；
Step 5: at the same time, the steady separator 13 that fires still works under ultra-low load, point come out from steady combustion separator 13
It is 62 DEG C from air, carries a small amount of coal dust and be arranged by surely firing the hot wind for combustion supporting pipeline 16 on 13 top of separator and being sent into boiler master
It burns in the hot wind for combustion supporting burner 17 in combustion zone and burnout degree region, hot wind for combustion supporting system works；
Step 6, when load or coal varitation, high low load operating mode is close.
The present invention cooperates operation by two systems under unit different load, and guarantee is run under high loads, not to machine
Group has a negative impact, and when running under excess load, the safe operation burning of unit may be implemented.
Claims (3)
1. a kind of low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires system, including run coal bin (1), former
Coal bunker (1) connects coal pulverizer (4) by metering system (2) connection feeder (3), feeder (3), the outlet end of coal pulverizer (4)
It connects primary air powder mixture pipeline (5), the arrival end of coal pulverizer (4) is separately connected heat primary air road (6), a cold air duct
(7) other end of one end, primary air powder mixture pipeline (5) connects main burner (11), heat primary air road (6), cold primary
The other end in air duct (7) is separately connected the hot-blast outlet end of air preheater (9), cold wind outlet end, the hot-blast outlet end of air preheater (9)
Also by hot secondary air duct (8) connection main burner (11), main burner (11) is set on burner hearth (10), burner hearth (10) outlet end
It connects air preheater (9), burner hearth (10) is equipped with burnout degree region (12), which is characterized in that described coal pulverizer (4) outlet end
Steady combustion separator (13) input end of primary air powder mixture pipeline (5) connection, surely fires separator (13) flour extraction end and outlet side point
Low ignition heat combustion system and hot wind for combustion supporting system are not set.
2. a kind of low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system as described in claim 1 fires system
System, which is characterized in that the low ignition heat combustion system includes steady coal-fired bucket (14), surely fires the connection of separator (13) flour extraction end
Low ignition heat wind powder pipe road (15) are connected in steady coal-fired bucket (14) input end, steady coal-fired bucket (14) outlet end, low ignition heat wind powder pipe
Heat primary air road (6) are connected in road (15) one end, and low ignition heat wind powder pipe road (15) other end connects the upper layer of main burner (11)
Burner, hot wind for combustion supporting system include hot wind for combustion supporting burner (17), surely fire separator (13) outlet side and pass through hot wind for combustion supporting pipe
Road (16) connects hot wind for combustion supporting burner (17).
3. a kind of fire system for the low ignition heat ultra-low load steady of thermal power plant's unit pulverized-coal system as described in claim 1
Working method, comprising the following steps: coal dust by run coal bin (1) enter metering system (2), enter back into feeder (3), by give coal
Machine (3) enters to coal and enters pulverized coal preparation in coal pulverizer (4), at the same time, after primary and secondary air cold air enters air preheater (9)
Become heat primary air and hot Secondary Air, heat primary air is by heat primary air road (6) and by a cold air duct (7) without sky
The cold First air of pre- device (9) all enters dry coal dust in coal pulverizer (4), the primary air powder mixture warp come out from coal pulverizer (4)
Primary air powder mixture pipeline (5) are crossed into burning in main burner (11), hot Secondary Air by hot secondary air duct (8) into
Enter main burner (11) aftercombustion, at the same extract from hot secondary air duct (8) hot Secondary Air enter burnout degree region (12) into
Row fractional combustion, which is characterized in that further comprising the steps of:
Step 1: unit under being more than or equal to current minimum steady combustion load when running, by the primary of coal pulverizer (4) outlet end
Primary air powder mixture is extracted on wind powder mixture pipeline (5) is sent into steady combustion separator (13)；
Step 2: primary air powder mixture carries out the separation of air and coal dust in surely combustion separator (13), and the coal dust after separation is logical
It crosses coal spout and is stored at the steady coal-fired bucket (14) being located at below steady combustion separator (13), the coal dust carried in isolated air passes through
The hot wind for combustion supporting pipeline (16) on steady combustion separator (13) top is sent into the heat that boiler primary combustion zone and burnout degree region is arranged in
Wind booster burners are burnt in (17), and hot wind for combustion supporting system works, and low ignition heat combustion system stops；
Step 3: unit still runs work in the case where being more than or equal to current minimum steady combustion load, the coal dust amount in steady coal-fired bucket (14)
When reaching maximum and requiring, stop extracting wind powder, low ignition heat combustion system and hot wind for combustion supporting system from primary air powder mixture
All stop working；
Step 4: when running under lower than current minimum steady combustion load, the coal dust come out from coal pulverizer (4) fully enters surely unit
The separation that wind powder is carried out in separator (13) is fired, the primary air powder mixture pipeline (5) to main burner (11) is closed, while from
First air conveying is extracted on heat primary air road (6) to fire from the upper layer that the coal dust that steady coal-fired bucket (14) comes out enters main burner (11)
Burner is burnt, low ignition heat combustion system work；
Step 5: surely firing separator (13) and still firing working under load lower than current minimum steady, come out from steady combustion separator (13)
The coal dust carried in separation air is arranged by surely firing the hot wind for combustion supporting pipeline (16) on separator (13) top and being sent into boiler master
It burns in the hot wind for combustion supporting burner (17) in combustion zone and burnout degree region, hot wind for combustion supporting system works.
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| CN201710037927.6A CN106871110B (en) | 2017-01-18 | 2017-01-18 | Low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires system |
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| CN201710037927.6A CN106871110B (en) | 2017-01-18 | 2017-01-18 | Low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires system |
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| CN107543196A (en) * | 2017-08-31 | 2018-01-05 | 山东英电环保科技有限公司 | Coal unit depth peak regulation surely fires system |
| CN110513981A (en) * | 2019-09-19 | 2019-11-29 | 西安交通大学 | A kind of system for realizing coal unit low-load combustion-stabilizing using dry coal slime |
| CN113719831B (en) * | 2021-09-10 | 2022-11-25 | 中国科学院山西煤炭化学研究所 | Method and device for ultra-low load stable combustion of pulverized coal fired boiler in power plant |
| CN114353059B (en) * | 2022-01-21 | 2023-09-05 | 清华大学 | Extremely narrow screening particle diameter pulverized coal circulating fluidized bed combustion system |
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