CN106871110A - 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
- Publication number
- CN106871110A CN106871110A CN201710037927.6A CN201710037927A CN106871110A CN 106871110 A CN106871110 A CN 106871110A CN 201710037927 A CN201710037927 A CN 201710037927A CN 106871110 A CN106871110 A CN 106871110A
- Authority
- CN
- China
- Prior art keywords
- coal
- combustion
- wind
- steady
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
System is fired the invention discloses a kind of low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system.The present invention is in former thermal power plant's unit pulverized-coal system unit boiler, for original powder processed and combustion system, after coal pulverizer, increase low ignition heat combustion system and hot wind for combustion supporting system newly to reduce ignition heat of the boiler under ultra-low load, operation is coordinated under unit different load by two systems, guarantee runs under high loads, unit is not had a negative impact, when being run under excess load, it is possible to achieve the safe and stable operation burning of unit, ensure the security of unit, improve the flexibility of unit.
Description
Technical field
System is fired the present invention relates to a kind of low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system, is used for
Boiler of the fired power generating unit in Ultra-low load operation is surely fired, so as to improve safety and stability fortune of the power station unit under ultra-low load
Row ability, ensures the security of unit boiler, belongs to power station technology field.
Background technology
In recent years, China's wind-powered electricity generation and photovoltaic installation scale rapidly increase, in-service and occupied the world installed capacity is built
First.On the one hand, the new energy such as wind-powered electricity generation and photovoltaic is to we provide a large amount of clean electric powers, on the other hand, its generated output
The safe operation also to power system of randomness and unstability and supply of electric power guarantee bring huge challenge.From current feelings
From the point of view of condition, China's power system regulating power is difficult to adapt to new energy extensive development and the requirement dissolved, some areas completely
Occur in that and more serious abandon wind, abandon light and abandon water problems.2015, whole year abandoned wind-powered electricity generation amount and is up to 33,900,000,000 kilowatt hours, " three Norths "
Some areas abandon wind and abandon light rate more than 20%.And thermoelectricity particularly coal group of motors, it will be still me in considerably long one period in future
Main force's power supply in state " three Norths " area.Transformed by coal group of motors, discharge its potential flexibility, China's electricity can be effectively improved
Force system regulating power, is the important content of China's propulsion high efficiency smart power system construction.
Country's situation for facing of Thermal Power Enterprises is that 6000 kilowatts of the whole nation in 2015 and above thermal power generating equipment are averagely utilized 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, it is proposed that the flexibility transformation of fired power generating unit, it is desirable to which unit participates in depth peak regulation, and lifting flexibility transformation is expected will
Thermoelectricity unit is set to increase the peak modulation capacity of 20% rated capacity, minimum technology is exerted oneself and reaches 40%-50% rated capacities；Pure condensate machine
Group increases the peak modulation capacity of 15%-20% rated capacities, and minimum technology is exerted oneself and reaches 30%-35% rated capacities.Part possesses
The power plant of transformation condition is expected to reach advanced world standards, and pure condensate operating mode minimum technology is exerted oneself and reached 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, what is most lacked at present is the lifting of peak modulation capacity.When unit is in Ultra-low load operation, such as Peak Load
Rate is reached under 20%, will produce a series of problems to unit safety operation, the problems such as 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
It is minimum stabilization operating load when, the temperature of burner hearth can drastically decline, and cause the quick ignition of coal dust to encounter difficulties, so trigger
Flame holding is poor, is susceptible to stop working, the major safety risks such as stove chamber fire-extinguishing is blown out.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 units as an example, the unit 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 to coal by feeder 3 and entered in coal pulverizer 4
Pulverized coal preparation, at the same time, primary and secondary air cold air is into being changed into heat primary air and hot Secondary Air, heat primary air after air preheater 9
All entered in coal pulverizer 4 by heat primary air road 6 and by the cold First air without air preheater 9 in a cold air channel 7 and dried
Coal dust, from the primary wind and powder mixture out of coal pulverizer 4 by primary wind and powder mixture conduit 5 into carrying out in main burner 11
Burning, hot Secondary Air enters the aftercombustion of main burner 11 by hot secondary air duct 8, while the extracting part from hot secondary air duct 8
Divide hot Secondary Air carries out fractional combustion into burnout degree region 12.Whole system ultra-low load lower hearth temperature can drastically under
Drop, causes the quick ignition of coal dust to encounter difficulties, and then triggers flame holding poor, is susceptible to stop working, and stove chamber fire-extinguishing is blown out
Deng major safety risks.The current machine set system maximum can only accomplish not throwing oil under 30%BMCR or 35%BMCR loads and can tie up
Keep steady and determine burning, it is impossible to meet ultra-low load (20%BMCR) and do not throw oil and Stable Combustion Technology can be maintained to require.
The content of the invention
The technical problem to be solved in the present invention is：Run under high loads there is provided one kind and unit is not had a negative impact
And operation can realize being caught fire for the low of thermal power plant's unit pulverized-coal system for unit safety operation burning under excess load
Hot ultra-low load steady fires system, and solving traditional fired power generating unit can drastically decline in ultra-low load lower hearth temperature, cause coal
The quick ignition of powder encounters difficulties, and then triggers flame holding poor, is susceptible to stop working, the considerable safety such as stove chamber fire-extinguishing is blown out
The problem of hidden danger.
In order to solve the above-mentioned technical problem, the technical scheme is that providing a kind of for thermal power plant's blowing powder producing
The low ignition heat ultra-low load steady combustion system of system, including run coal bin, run coal bin connect feeder, feeder by metering system
Connection coal pulverizer, the port of export of coal pulverizer connects primary wind and powder mixture conduit, heat primary air road, the one of a cold air channel respectively
End, the other end connection main burner of primary wind and powder mixture conduit, heat primary air road, the other end in a cold air channel connect respectively
Hot-blast outlet end, the cold wind port of export of air preheater are connect, the hot-blast outlet end of air preheater also connects main burning by hot secondary air duct
Device, on burner hearth, the logical air preheater of furnace outlet termination, burner hearth is provided with burnout degree region to main burner, it is characterised in that institute
The steady combustion separator entrance point of primary wind and powder mixture conduit connection of the coal pulverizer port of export stated is steady to fire separator flour extraction end and go out
Gas end is respectively provided with low ignition heat combustion system and hot wind for combustion supporting system.
Preferably, described low ignition heat combustion system includes steady coal-fired bucket, and steady combustion separator flour extraction end connection is steady coal-fired
Bucket entrance point, the steady coal-fired bucket port of export connects low ignition heat wind powder pipe road, 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 connects the upper strata burner of main burner, and hot wind for combustion supporting system is fired including hot wind for combustion supporting
Burner, steady combustion separator outlet side connects hot wind for combustion supporting burner by hot wind for combustion supporting pipeline.
A kind of low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires the method for work of system, including
Following steps：Coal dust enters metering system by run coal bin, enters back into feeder, is entered to coal by feeder and enters coal in coal pulverizer
Prepared by powder, at the same time, primary and secondary air cold air leads into heat primary air and hot Secondary Air, heat primary air is changed into after air preheater
Cross heat primary air road and by the cold First air without air preheater in a cold air channel all into drying coal dust in coal pulverizer, from
Coal pulverizer primary wind and powder mixture out is by primary wind and powder mixture conduit into being burnt in main burner, and heat is secondary
Wind enters main burner aftercombustion by hot secondary air duct, while hot Secondary Air is extracted from hot secondary air duct enters burnout degree
Region carries out fractional combustion, it is characterised in that further comprising the steps of：
Step 1：Unit more than or equal to current minimum steady combustion load under run when, by the coal pulverizer port of export once
The steady combustion separator of primary wind and powder mixture feeding is extracted on wind powder mixture pipeline；
Step 2：Primary wind and powder mixture carries out the separation of air and coal dust in steady combustion separator, and the coal dust after separation leads to
The steady coal-fired bucket that coal spout is stored at below steady combustion separator is crossed, the coal dust carried in the air of separation is separated by steady combustion
The hot wind for combustion supporting pipeline feeding on device top is entered in being arranged on the hot wind for combustion supporting burner in boiler primary combustion zone and burnout degree region
Row burning, hot wind for combustion supporting system is operated, and low ignition heat combustion system stops；
Step 3：Unit still runs work under 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 wind and powder mixture
All it is stopped；
Step 4：Unit is fully entered surely when being run under less than current minimum steady combustion load from coal pulverizer coal dust out
Enter the separation of sector-style powder in combustion separator, the primary wind and powder mixture conduit to main burner is closed, while from heat primary air road
The coal dust that upper extraction First air conveying struggles against out from steady fire coal is burnt into the upper strata burner of main burner, low ignition heat
Combustion system works；
Step 5：Steady combustion separator is still firing working under load less than current minimum steady, from the separation out of steady combustion separator
The coal dust carried in air is sent into by the hot wind for combustion supporting pipeline on steady combustion separator top and is arranged on boiler primary combustion zone and combustion
Burnt in the hot wind for combustion supporting burner in wind region to the greatest extent, hot wind for combustion supporting system is operated.
The present invention in former thermal power plant's unit pulverized-coal system unit boiler, for original powder processed and combustion system, in coal-grinding
After machine, increase low ignition heat combustion system and hot wind for combustion supporting system newly to reduce ignition heat of the boiler under ultra-low load, by two
Individual system coordinates operation under unit different load, it is ensured that runs under high loads, unit is not had a negative impact, super negative
When being run under lotus, it is possible to achieve the safe and stable operation burning of unit, it is ensured that the security of unit, the flexibility of unit is improved.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the present invention is by that can realize stabilization burning of power plant's unit pulverized-coal system unit boiler under ultra-low load.
2nd, invention increases hot wind for combustion supporting system, under load near minimum steady combustion load, the combustion characteristics of boiler becomes
Must be better than in the past.
Brief description of the drawings
Fig. 1 is thermal power unit boiler powder and combustion system figure before transformation；
Fig. 2 is the schematic diagram of the low ignition heat ultra-low load steady combustion system for thermal power plant's unit pulverized-coal system.
Specific embodiment
To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.It should be understood that
These embodiments are only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that reading the present invention
After the content of instruction, those skilled in the art can make various changes or modifications to the present invention, and these equivalent form of values equally fall
In the application appended claims limited range.
The present invention fires system for a kind of low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system, for pot
Steady combustion of the stove 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, partial fume entrance is extracted on the primary wind and powder mixing duct 5 of the port of export of coal pulverizer 4
Newly-increased steady combustion separator 13, is respectively provided with low ignition heat combustion system and hot wind for combustion supporting system afterwards.
I.e. run coal bin 1 connects feeder 3, the connection coal pulverizer 4 of feeder 3, the port of export of coal pulverizer 4 by metering system 2
Primary wind and powder mixture conduit 5, heat primary air road 6, the one end in a cold air channel 7, primary wind and powder mixture conduit 5 are connected respectively
Other end connection main burner 11, the hot blast that heat primary air road 6, the other end in a cold air channel 7 connect air preheater 9 respectively goes out
Mouth end, the cold wind port of export, the hot-blast outlet end of air preheater 9 also connect main burner 11, main burner 11 by hot secondary air duct 8
On burner hearth 10, the port of export of burner hearth 10 connects air preheater 9, and burner hearth 10 is provided with burnout degree region 12, the port of export of coal pulverizer 4
Primary wind and powder mixture conduit 5 connects the steady combustion entrance point of separator 13, and low ignition heat combustion system includes steady coal-fired bucket 14, steady combustion
The flour extraction end of separator 13 connection 14 entrance points of steady coal-fired bucket, steady coal-fired bucket 14 is located at the steady lower section of combustion separator 13, steady coal-fired bucket 14
The port of export connects low ignition heat wind powder pipe road 15, and heat primary air road 6, the low hot blast that catches fire are connected in low one end of ignition heat wind powder pipe road 15
The other end of powder pipeline 15 connects the upper strata burner of main burner 11, and hot wind for combustion supporting system includes hot wind for combustion supporting burner 17, surely
Combustion separator 13 outlet side connects hot wind for combustion supporting burner 17 by hot wind for combustion supporting pipeline 16.
The coal dust after separator 13 is out separated into steady coal-fired bucket 14 is fired from steady, part is extracted from heat primary air road 6
Heat primary air, coal dust is burnt into the upper strata burner of main burner 11 in the steady coal-fired bucket 14 of conveying, 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 annex such as flapper, reversal valve, packing auger, control valve etc..
A small amount of coal dust is carried from steady combustion separator 13 separation air out to be helped by the hot blast on steady combustion separator 13 top
The combustion feeding of pipeline 16 is burnt in being arranged on the hot wind for combustion supporting burner 17 in boiler primary combustion zone and burnout degree region, is constituted
Hot wind for combustion supporting system.Hot wind for combustion supporting system includes combustion-supporting nozzle, and combustion-supporting bellows and connecting pipe and its annex such as control valve.
Certain power plant 600MW super critical boilers with Harbin Boiler Plant production are as object.For thermal power plant's blowing powder producing
The low ignition heat ultra-low load steady of system fires the method for work of system, and its operating procedure is as follows：
Coal dust enters metering system 2 by run coal bin 1, enters back into feeder 3, by feeder 3 to coal into entering in coal pulverizer 4
Enter pulverized coal preparation, at the same time, into heat primary air and hot Secondary Air is changed into after air preheater 9, heat is once for primary and secondary air cold air
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 channel 7
Dry coal dust, from the primary wind and powder mixture out of coal pulverizer 4 by primary wind and powder mixture conduit 5 into entering in main burner 11
Row burning, hot Secondary Air enters the aftercombustion of main burner 11 by hot secondary air duct 8, while being extracted from hot secondary air duct 8
Hot Secondary Air carries out fractional combustion into burnout degree region 12, further comprising the steps of：
Step 1：The unit runs under high load capacity (firing load more than or equal to current minimum steady, the factory is 35%BMCR)
When, by the primary wind and powder mixture that 10% is extracted in 64 DEG C of the port of export of former coal pulverizer 4 of primary wind and powder mixture conduit 5
In the steady combustion separator 13 of feeding；
Step 2：Primary wind and powder mixture carries out the separation of air and coal dust, the coal dust after separation in steady combustion separator 13
Steady coal-fired bucket 14 positioned at the steady lower section of combustion separator 13 is stored at by coal spout, the air of separation is 64 DEG C, carries a small amount of coal
Powder is sent into by the hot wind for combustion supporting pipeline 16 on steady combustion separator 13 top and is arranged on boiler primary combustion zone and burnout degree region
Burnt in hot wind for combustion supporting burner 17, hot wind for combustion supporting system is operated, 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 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 wind and powder mixture
System is all stopped；
Step 4：When unit runs under ultra-low load (firing load less than current minimum steady, the factory is 35%BMCR), from
The coal dust out of coal pulverizer 4 fully enters the separation for entering sector-style powder 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 that part wind-warm syndrome is 320 DEG C is extracted from heat primary air road 6 being struggled against from steady fire coal
14 coal dust out is burnt into the upper strata burner of main burner 11, low ignition heat combustion system work；
Step 5：At the same time, steady combustion separator 13 still works under ultra-low load, from steady combustion separator 13 out point
It it is 62 DEG C from air, a small amount of coal dust of carrying is sent into by the hot wind for combustion supporting pipeline 16 on steady combustion separator 13 top and is arranged on boiler main
Burnt in the hot wind for combustion supporting burner 17 in combustion zone and burnout degree region, hot wind for combustion supporting system is operated；
Step 6, when load or coal varitation, its low load operating mode high is close.
The present invention coordinates operation by two systems under unit different load, it is ensured that run under high loads, not to machine
Group has a negative impact, when being run under excess load, it is possible to achieve the safe operation burning of unit.
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 feeder (3) by metering system (2), and feeder (3) connects coal pulverizer (4), the port of export of coal pulverizer (4)
Primary wind and powder mixture conduit (5), heat primary air road (6), one end of a cold air channel (7), primary wind and powder mixing are connected respectively
The other end of conduit (5) connects main burner (11), and heat primary air road (6), the other end of a cold air channel (7) are connected respectively
The hot-blast outlet end of air preheater (9), the cold wind port of export, the hot-blast outlet end of air preheater (9) are also connected by hot secondary air duct (8)
Main burner (11), on burner hearth (10), burner hearth (10) port of export connects air preheater (9), burner hearth (10) to main burner (11)
It is provided with burnout degree region (12), it is characterised in that the primary wind and powder mixture conduit (5) of described coal pulverizer (4) port of export
Steady combustion separator (13) entrance point of connection, surely fires separator (13) flour extraction end and outlet side is respectively provided with low ignition heat combustion system
With hot wind for combustion supporting system.
2. a kind of low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system as claimed in claim 1 fires system
System, it is characterised in that described low ignition heat combustion system includes steady coal-fired bucket (14), surely fires the connection of separator (13) flour extraction end
Steady coal-fired bucket (14) entrance point, steady coal-fired bucket (14) port of export connects low ignition heat wind powder pipe road (15), low ignition heat wind powder pipe
Heat primary air road (6), the upper strata of low ignition heat wind powder pipe road (15) other end connection main burner (11) are connected in road (15) one end
Burner, hot wind for combustion supporting system includes hot wind for combustion supporting burner (17), surely fires separator (13) outlet side and passes through hot wind for combustion supporting pipe
Road (16) connects hot wind for combustion supporting burner (17).
3. a kind of low ignition heat ultra-low load steady for being used for thermal power plant's unit pulverized-coal system as claimed in claim 1 fires system
Method of work, comprise the following steps：Coal dust enters metering system (2) by run coal bin (1), feeder (3) is entered back into, by coal
Machine (3) enters in coal pulverizer (4) to coal and enters pulverized coal preparation, at the same time, after primary and secondary air cold air enters air preheater (9)
It is changed into heat primary air and hot Secondary Air, heat primary air is by heat primary air road (6) and by a cold air channel (7) without sky
The cold First air of pre- device (9) all enter coal pulverizer (4) in dry coal dust, from coal pulverizer (4) out primary wind and powder mixture warp
Cross and burnt in primary wind and powder mixture conduit (5) entrance main burner (11), hot Secondary Air is entered by hot secondary air duct (8)
Enter main burner (11) aftercombustion, while hot Secondary Air is extracted from hot secondary air duct (8) entering into burnout degree region (12)
Row fractional combustion, it is characterised in that further comprising the steps of：
Step 1：Unit more than or equal to current minimum steady combustion load under run when, by coal pulverizer (4) port of export once
The steady combustion separator (13) of primary wind and powder mixture feeding is extracted on wind powder mixture pipeline (5)；
Step 2：Primary wind and powder mixture carries out the separation of air and coal dust in steady combustion separator (13), and the coal dust after separation leads to
The steady coal-fired bucket (14) that coal spout is stored at below steady combustion separator (13) is crossed, the coal dust carried in the air of separation passes through
Hot wind for combustion supporting pipeline (16) feeding on steady combustion separator (13) top is arranged on the heat in boiler primary combustion zone and burnout degree region
Wind booster burners are burnt in (17), and hot wind for combustion supporting system is operated, and low ignition heat combustion system stops；
Step 3：Unit still runs work under 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 wind and powder mixture
All it is stopped；
Step 4：Unit is fully entered surely when being run under less than current minimum steady combustion load from coal pulverizer (4) coal dust out
Enter the separation of sector-style powder in combustion separator (13), the primary wind and powder mixture conduit (5) to main burner (11) is closed, while from
First air conveying coal dust from steady coal-fired bucket (14) out is extracted on heat primary air road (6) to be fired into the upper strata of main burner (11)
Burner is burnt, low ignition heat combustion system work；
Step 5：Steady combustion separator (13) still firing working under load less than current minimum steady, from steady combustion separator (13) out
The coal dust carried in separation air is arranged on boiler main by hot wind for combustion supporting pipeline (16) feeding on steady combustion separator (13) top
Burnt in the hot wind for combustion supporting burner (17) in combustion zone and burnout degree region, hot wind for combustion supporting system is operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106871110A true CN106871110A (en) | 2017-06-20 |
| CN106871110B CN106871110B (en) | 2019-01-22 |
Family
ID=59158358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710037927.6A Active 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106871110B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113719831A (en) * | 2021-09-10 | 2021-11-30 | 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 |
| CN114353059A (en) * | 2022-01-21 | 2022-04-15 | 清华大学 | Extremely narrow screening particle size fine coal circulating fluidized bed combustion system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315636A (en) * | 2006-05-24 | 2007-12-06 | Chugoku Electric Power Co Inc:The | Coal type changeover method and its system in coal- fired thermal power boiler |
| CN102494333A (en) * | 2011-11-14 | 2012-06-13 | 上海锅炉厂有限公司 | Anthracite-combusted single fire ball four-corner direct current burner |
| CN102889609A (en) * | 2011-07-20 | 2013-01-23 | 上海机易电站设备有限公司 | Pulverizing system of smoke drying lignite coal steel ball mill |
| CN203823790U (en) * | 2014-04-16 | 2014-09-10 | 西安西热锅炉环保工程有限公司 | Positive pressure direct blow type coal pulverizing system based on temperature segmented control |
| CN104251487A (en) * | 2014-09-24 | 2014-12-31 | 西安西热锅炉环保工程有限公司 | Method for improving boiler combustion economy of tangential combustion anthracite coal boiler |
| CN104807004A (en) * | 2015-04-15 | 2015-07-29 | 华南理工大学 | Rough and fine coal powder separating and combusting device in coal powder pipe |
| CN105509085A (en) * | 2015-12-18 | 2016-04-20 | 上海锅炉厂有限公司 | System and method for reducing boiler NOx emission by tertiary air concentrated-diluted separation |
-
2017
- 2017-01-18 CN CN201710037927.6A patent/CN106871110B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315636A (en) * | 2006-05-24 | 2007-12-06 | Chugoku Electric Power Co Inc:The | Coal type changeover method and its system in coal- fired thermal power boiler |
| CN102889609A (en) * | 2011-07-20 | 2013-01-23 | 上海机易电站设备有限公司 | Pulverizing system of smoke drying lignite coal steel ball mill |
| CN102494333A (en) * | 2011-11-14 | 2012-06-13 | 上海锅炉厂有限公司 | Anthracite-combusted single fire ball four-corner direct current burner |
| CN203823790U (en) * | 2014-04-16 | 2014-09-10 | 西安西热锅炉环保工程有限公司 | Positive pressure direct blow type coal pulverizing system based on temperature segmented control |
| CN104251487A (en) * | 2014-09-24 | 2014-12-31 | 西安西热锅炉环保工程有限公司 | Method for improving boiler combustion economy of tangential combustion anthracite coal boiler |
| CN104807004A (en) * | 2015-04-15 | 2015-07-29 | 华南理工大学 | Rough and fine coal powder separating and combusting device in coal powder pipe |
| CN105509085A (en) * | 2015-12-18 | 2016-04-20 | 上海锅炉厂有限公司 | System and method for reducing boiler NOx emission by tertiary air concentrated-diluted separation |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113719831A (en) * | 2021-09-10 | 2021-11-30 | 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 |
| CN114353059A (en) * | 2022-01-21 | 2022-04-15 | 清华大学 | Extremely narrow screening particle size fine coal circulating fluidized bed combustion system |
| CN114353059B (en) * | 2022-01-21 | 2023-09-05 | 清华大学 | Extremely narrow screening particle diameter pulverized coal circulating fluidized bed combustion system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106871110B (en) | 2019-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206739283U (en) | A kind of depth peak regulation preheats low-load combustion-stabilizing combustion system with heat smoke | |
| CN106871110B (en) | Low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires system | |
| CN102506407A (en) | Cold start oil auxiliary heating system of boiler and heat source-less independent starting method of generating set | |
| CN107327832B (en) | The ultra-low load steady for improving boiler combustion characteristic for fired power generating unit fires system | |
| CN107606603A (en) | A kind of combustion system for the combustion of pulverized-coal fired boiler ultra-low load steady | |
| CN103234364B (en) | Device with griddle and process for generating power by efficiently recycling sinter waste heat | |
| CN207514895U (en) | For the combustion system of pulverized-coal fired boiler ultra-low load steady combustion | |
| CN105987379A (en) | Boiler unit | |
| CN104266214A (en) | Fan mill opening type powder producing system super or supercritical tower type boiler combustion and heat exchange method | |
| CN111981459A (en) | Optimization control method of multi-fuel co-combustion coal-fired unit under RB working condition | |
| CN103486563A (en) | Supercritical once-through boiler capable of firing eastern Junggar coal | |
| CN213453608U (en) | W flame boiler degree of depth peak shaving system based on flue gas recirculation | |
| CN105202575A (en) | Ignition method and device through high-temperature high oxygen torch generated by coal powder or crushed coal combustion | |
| CN201748414U (en) | Direct blowing type coal dust boiler anti-explosive treatment system | |
| CN204240347U (en) | Superheat steam drying powder process type coal generating system | |
| CN103343954B (en) | Quality-improved lignite combustion or blending combustion system | |
| CN106287672A (en) | There is face-fired boiler and the control method thereof of thermoelectricity motility regulatory function | |
| CN103836636B (en) | A kind of device reducing heat primary air cold wind incorporation efficiency | |
| CN207247258U (en) | Coal unit depth peak regulation surely fires system | |
| CN102818247B (en) | Efficient steam boiler for gasification and combined combustion of pulverized coal | |
| CN206398702U (en) | Burner region variable cross-section adapts to the Pulverized Coal fired Boiler Furnace of flexibility peak regulation | |
| CN107747730A (en) | Direct-firing coal unit depth peak regulation surely fires system | |
| CN204240384U (en) | Superheat steam drying powder process type coal generating system | |
| CN204240386U (en) | Superheat steam drying powder process type coal generating system | |
| CN204240391U (en) | Superheat steam drying powder process type coal generating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Patentee after: SHANGHAI POWER EQUIPMENT Research Institute Address before: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Patentee before: SHANGHAI POWER EQUIPMENT Research Institute |
|
| CP01 | Change in the name or title of a patent holder |