CN109268866A - A kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal - Google Patents
A kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal Download PDFInfo
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- CN109268866A CN109268866A CN201811037682.8A CN201811037682A CN109268866A CN 109268866 A CN109268866 A CN 109268866A CN 201811037682 A CN201811037682 A CN 201811037682A CN 109268866 A CN109268866 A CN 109268866A
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- 239000003245 coal Substances 0.000 title claims abstract description 120
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 23
- 238000010304 firing Methods 0.000 title claims abstract description 22
- 230000008676 import Effects 0.000 claims abstract description 6
- 239000002817 coal dust Substances 0.000 claims description 37
- 239000000843 powder Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 abstract description 16
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002274 desiccant Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 210000004894 snout Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/007—Regulating air supply or draught using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1003—Processes to make pulverulent fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/20—Drying
-
- 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 belongs to power industry fields, and in particular to a kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal, including air preheater, pressure fan, coal burner, medium-speed pulverizer and dense-and-weak separator；The pressure fan connects air preheater, the air preheater is divided into an air duct and secondary air duct, air duct connects with medium-speed pulverizer import, the secondary air duct connects with coal burner, the medium-speed pulverizer exit is connected with dense-and-weak separator, and the concentrated phase outlet of dense-and-weak separator connects with coal burner, in light phase outlet access secondary air duct, and is passed directly into coal burner.The present invention not only solves the drying problem of high-moisture raw coal, while also solving the problems, such as that primary air ratio is excessively high in drying process, realizes application of the medium-speed pulverizer in high-moisture raw coal.
Description
Technical field
The invention belongs to power industry fields, and in particular to a kind of medium-speed pulverizer suitable for high-moisture coal is direct-firing
Pulverized coal combustion system.
Background technique
In pulverized-coal fired boiler field, for the less high coal quality of moisture content, usually use medium-speed pulverizer or ball mill as
Powder manufacturing apparatus.And for the coal quality of high moisture levels (as moisture in coal be greater than 35%) if usually using blower mill.In
Speed coal mill and fan mill respectively have its advantage and disadvantage, and medium-speed pulverizer relative to fan mill in certain technology neighborhood and O&M cost
It is upper that there are some advantages.But it is limited to its drying capacity ability and primary air ratio is unsuitable excessively high, medium-speed pulverizer is more difficult to be applied to
Compared with high-moisture coal.It is applied to be a development side in boiler industry compared with high-moisture coal quality so expanding medium-speed pulverizer at present
To.
In commonly used middling speed grinding system, original is dried using the hot wind that air preheater (referred to as air preheater) exports
Coal.Moisture in coal is higher, needed for hot blast temperature and flow it is higher.When moisture in coal reaches certain content (such as larger than
35%), even if having connected tube-type air preheater after rotary air preheater, the hot air flow for drying raw coal is still excessive, can be big
In 40%.This can bring discharged nitrous oxides caused by due to primary air ratio is excessive obviously to rise, due to secondary air flow is too low
Cause secondary wind speed relatively low, the consequences such as burner nozzle and Boiler Furnace slagging are serious.For having the medium-speed pulverizer of light-dark separation device
Coal machine system equally has the above problem if light phase enters light phase burner combustion；If light phase is directly discharged in atmosphere,
Can lose light phase physical thermal and light phase contained in a small amount of coal dust chemical heat, have negative effect to boiler efficiency, also can
Cause the pollution of environment.
It is straight that the Chinese invention patent of Publication No. CN102840594A discloses a kind of flue gas drying lignite medium-speed pulverizer
Formula pulverized coal preparation system is blown, includes medium-speed pulverizer, pulverized coal distributor, pressure fan, seal fan and in boiler flue
Air preheater, the pulverized coal distributor is connected between the tailing separator and burner of medium-speed pulverizer middle outlet, described
Pressure fan connects air preheater, and air preheater divides two-way, connects burner all the way, and the seal fan connects middling speed coal-grinding
Secret envelope air port, coal feed point of the medium-speed pulverizer at top are connected with drying device, have at the top of the drying device into
Coal mouth and high temperature flue gas drying agent entrance, bottom have coal outlet, and bottom sides have exhaust outlet, and the exhaust outlet is through arranging powder wind
The air inlet of machine connection medium-speed pulverizer；There is light phase hot air mixer, institute between the tailing separator and pulverized coal distributor
It states air preheater another way and connects the light phase hot air mixer.Above scheme will by drying device by the moisture in lignite into
Row control, while the exhaust of drying device being sent into using row powder fan the air inlet of medium-speed pulverizer, is used as instead of hot wind
Desiccant and powder transmitting medium needed for speed coal mill operation.Although the technical solution can be by the moisture removal in coal, in face of height
The coal dust of moisture has also been able to solve moisture problem, but needs a large amount of desiccant as raw material, constantly replaces, burning is asked
Topic does not still solve.
Summary of the invention
For the problems of the prior art, it is direct-firing that the present invention provides a kind of medium-speed pulverizer suitable for high-moisture coal
Pulverized coal combustion system, not only solves the drying problem of high-moisture raw coal, while also solving primary air ratio mistake in drying process
High problem realizes application of the medium-speed pulverizer in high-moisture raw coal.
To realize the above technical purpose, the technical scheme is that
A kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal, including air preheater, give
Blower, coal burner, medium-speed pulverizer and dense-and-weak separator；The pressure fan connects air preheater, the air preheat
Device is divided into an air duct and secondary air duct, and an air duct connects with medium-speed pulverizer import, the secondary air duct and coal dust
Burner connects, and the medium-speed pulverizer exit is connected with dense-and-weak separator, and concentrated phase outlet and the coal dust of dense-and-weak separator
Burner connects, and in light phase outlet access secondary air duct, and is passed directly into coal burner.
After the air preheater heating, the temperature of hot-air is not less than 300 DEG C.
It is provided with separation after-flame air duct in the secondary air duct, and separates after-flame air duct and is located at after air preheater, it is light
Mutually before the junction of access secondary air duct.
It is also connected with cold wind bypass air duct for described one time between air duct and air preheater import, the cold wind bypasses air duct
On be provided with controllable register.
Primary air fan is additionally provided on air duct.
The dense-and-weak separator uses spiral-flow type dense-and-weak separator.
Hot-air and the temperature after light mix are 200-350 DEG C in the secondary air duct.
The junction of the light phase access secondary air duct is provided with controllable register, for adjusting the air quantity of light phase.
Cold air in environment enters air preheater by pressure fan, by the heating of air preheater, after heating
Hot-air passes through an air duct and secondary air duct respectively；Hot-air in air duct enters in medium-speed pulverizer in coal pulverizer
Raw coal be dried；Coal dust in medium-speed pulverizer enters in dense-and-weak separator in the case where the hot-air in an air duct drives,
Separation forms concentrated phase and light phase, and concentrated phase is introduced in coal burner via powder feeding pipes, and the coal powder density in concentrated phase is higher,
Light phase is delivered in secondary air duct by low-density wind machine, and is passed directly into coal dust firing after mixing with the hot-air in secondary air duct
In device.
Hot-air in air duct is passed through in medium-speed pulverizer by the present invention, utilizes heat in the dry mill processes of raw coal
Air heats coal dust, while being vapor by water transform, the moisture in coal dust can be effectively reduced, via air-coal separating
The high concentrated phase of coal dust content is added to coal burner device, at the same the low light phase of coal dust content by low-density wind machine be passed through to
It in secondary air duct, mixes, is then passed to coal burner with the hot-air in secondary air duct.Since the coal dust in concentrated phase is dense
Degree is high, can guarantee the firing temperature and steady combustion ability in coal burner；It is empty for drying the air duct heat of raw coal simultaneously
Gas a part enters to secondary air duct by low-density wind machine, it can be ensured that the primary air ratio into coal burner is in normal water
It is flat.Which solves the problems, such as that existing high-moisture raw coal can not be dry using medium-speed pulverizer, while also solving dry height
Nitrogen oxygen combustion problem of the hot-air of moisture raw coal in coal burner；It can guarantee that burner keeps low nitrogen burning, reduce
The generation of nitrogen oxides.
The hot-air of secondary air duct is capable of forming the hot-air containing a small amount of coal dust, due to deep or light by mixing with light
The presence of separator can control the aerial concentration of coal dust, not influence the safety of secondary air duct, and can utilize light phase
To the air of secondary air duct supplement, it can effectively improve it in the wind rate of coal burner inlet, effective solution height
The problem of secondary air ratio deficiency in moisture coal dust treatment process.The vapor contained in light phase, mixed content is lower, right
Burning does not constitute big negative effect, and since its biggish specific heat capacity can reduce whole temperature, reduces the burning of nitrogen oxygen, drop
The discharge of low NOx.
Pipe is used for the connection of pressure fan and medium-speed pulverizer by cold wind, can by the cold wind before air preheater directly with
Hot-air mixing in air duct, is adjusted control to the air themperature of medium-speed pulverizer entrance；Dense-and-weak separator uses
Spiral-flow type dense-and-weak separator can realize the condition to different burner layer fine coal concentration by adjusting blade pitch angle,
The coal dust content in light phase can be controlled simultaneously minimum.
The interface of burnout degree and secondary air duct is separated before the connector that light phase passes through secondary air duct, guarantees it not by light
The influence of phase.
The present invention solves the problems, such as that high-moisture raw coal drying effect in medium-speed pulverizer is bad, while also solving height
Hot-air wind rate needed for moisture raw coal is dry is excessive, leads to the problem of a large amount of oxynitrides；By dense-and-weak separator by light phase
It is passed through secondary air duct, temperature of the concentrated phase in burning is reduced because of low oxygen amount supply, also passes through control air
Classification forms low nitrogen burning system, and promotes secondary air ratio by the mixing of secondary air flow and light phase, to have ready conditions
Mention its wind speed and rigidity, can organizational delay burn and mitigate the formation of Boiler Furnace slagging.
The present invention is applicable not only to high-moisture raw coal, while being still suitable for low moisture raw coal: light phase is exported and is closed, this
When, the coal dust in medium-speed pulverizer enters in dense-and-weak separator in the case where the hot-air in an air duct drives, and separation forms concentrated phase
With light phase, concentrated phase is introduced in coal burner via powder feeding pipes, and the coal powder density in concentrated phase is higher, the coal dust in light phase
Content is lower, while also having low-density wind to be fed through powder feeding pipes and entering in coal burner, and the hot-air in secondary air duct is straight
It connects in coal burner.
The present invention not only solves the drying problem of high-moisture raw coal, while also solving primary air ratio mistake in drying process
High problem realizes application of the medium-speed pulverizer in high-moisture raw coal.
Direct-firing pulverized coal combustion system provided by the invention can be applied not only to the burning processing of high-moisture raw coal, and
And still can be used in low moisture original burning of coal use, practicability is stronger, and use scope is bigger.
Specific embodiment
The present invention will be described in detail in conjunction with the embodiments, but does not do any restriction to claim of the invention.
Embodiment 1
A kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal, including air preheater, give
Blower, coal burner, medium-speed pulverizer and dense-and-weak separator；The pressure fan connects air preheater, the air preheat
Device is divided into an air duct and secondary air duct, and an air duct connects with medium-speed pulverizer import, the secondary air duct and coal dust
Burner connects, and the medium-speed pulverizer exit is connected with dense-and-weak separator, and concentrated phase outlet and the coal dust of dense-and-weak separator
Burner connects, and in light phase outlet access secondary air duct, and is passed directly into coal burner.Wherein, medium-speed pulverizer and deep or light
It is connected between separator using pulverized coal channel, and pulverized coal channel is designed using reduction formula, the dense-and-weak separator uses eddy flow leaf
Chip fine coal ring shaped separator；The outlet of concentrated phase accesses burner by coal dust branch pipe, and the outlet of light phase promotes wind via blower
It presses and is sent into secondary air duct, increase secondary air flow, subsequently enter burner overfire air port, it is ensured that the flow velocity of Secondary Air and just
Property.
In embodiment, coal dust branch pipe has 4, for connecting a wind snout in coal burner, controls every branch
Coal powder density in pipe is almost the same, and the coal dust content in light phase is controlled below 10%.
The flow of light phase can be adjusted in controllable register, to adjust the flow and always secondary into secondary air duct
Air quantity.Secondary Air mixes rear temperature and decreases with light, and steam content slightly rises, and has a small amount of coal dust.The present embodiment
In, it is 43% for coal dust moisture, Lower heat value is the coal quality of 12.9MJ/kg, and the moisture content of raw coal drying to 20% enters
The primary air ratio of coal pulverizer is 55%.Secondary air duct, mixed secondary air temperature are drawn and be sent into the light phase that wind rate is 20%
It is 200 DEG C, steam content is no more than 3%, and coal dust content is no more than 0.045kg/kg.At this point, into wind snout of burner
Primary air ratio be only 35%, the temperature of hot-air is 340 DEG C, and the temperature at dense-and-weak separator is 60 DEG C.
The embodiment uses medium-speed pulverizer instead of blower mill, while the height that will also match with blower mill
Temperature is taken out the equipment such as stove pipe and is cancelled, and whole cost of investment and maintenance cost are reduced.
Coal dust moisture is 43% by the embodiment, and the high-moisture coal dust that Lower heat value is 12.9MJ/kg is converted into moisture and is
20% low moisture coal dust, and primary air ratio is only 35%, guarantees that burner keeps low nitrogen burning, reduces the life of nitrogen oxides
At.
Embodiment 2
Compared with Example 1 compared with difference is only that: using coal dust moisture for 38%, Lower heat value is the original of 13.9MJ/kg
Coal coal dust.
Embodiment 3
Compared with Example 1 compared with difference is only that: using coal dust moisture for 35.1%, status calorific value is 14.3MJ/kg's
Raw coal coal dust.
Embodiment 4
Compared with Example 1 compared with difference is only that, the pipeline between light phase outlet and secondary air duct is closed, using coal
Moisture is 10%, the raw coal coal dust of calorific value 20MJ/kg
It can be seen that the present invention by embodiment 1-3 and filled up application of the medium-speed pulverizer in high-moisture coal, it is ensured that
While coal dust firing, the generation of nitrogen oxides is effectively reduced.
Embodiment 4 is as can be seen that pulverized coal combustion system provided by the invention can be applied not only to the combustion of high-moisture raw coal
Burning processing, and still can be used in low moisture original burning of coal use, practicability is stronger, and use scope is bigger.
It is understood that being merely to illustrate the present invention above with respect to specific descriptions of the invention and being not limited to this
Technical solution described in inventive embodiments.Those skilled in the art should understand that still can be carried out to the present invention
Modification or equivalent replacement, to reach identical technical effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal, it is characterised in that: including air
Preheater, pressure fan, coal burner, medium-speed pulverizer and dense-and-weak separator；The pressure fan connects air preheater, described
Air preheater is divided into an air duct and secondary air duct, and an air duct connects with medium-speed pulverizer import, the Secondary Air
Road connects with coal burner, and the medium-speed pulverizer exit is connected with dense-and-weak separator, and the concentrated phase of dense-and-weak separator goes out
Mouth connects with coal burner, in light phase outlet access secondary air duct, and is passed directly into coal burner.
2. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 1,
It is characterized by: the system the specific process is as follows: the cold air in environment enters air preheater by pressure fan, pass through
The heating of air preheater；Hot-air after heating passes through an air duct and secondary air duct respectively；Hot-air in air duct
The raw coal in coal pulverizer is dried into medium-speed pulverizer；Heat of the coal dust in an air duct in medium-speed pulverizer is empty
Gas enters in dense-and-weak separator under driving, and separation forms concentrated phase and light phase, and concentrated phase is introduced in coal dust firing via powder feeding pipes
Device, and the coal powder density in concentrated phase is higher, light phase is delivered in secondary air duct by low-density wind machine, and with the heat in secondary air duct
It is passed directly into coal burner after air mixing.
3. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: the temperature of hot-air is not less than 300 DEG C after the air preheater heating.
4. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: being provided with separation after-flame air duct in the secondary air duct, and separates after-flame air duct and is located at after air preheater,
Before the junction of light phase access secondary air duct.
5. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: described one time is also connected with cold wind bypass air duct, the cold wind bypass between air duct and air preheater import
Controllable register is provided on air duct.
6. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: being additionally provided with primary air fan on an air duct.
7. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: the dense-and-weak separator uses spiral-flow type dense-and-weak separator.
8. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: it is 60-120 DEG C that the coal dust, which is added to the temperature of dense-and-weak separator,.
9. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: hot-air and the temperature after light mix are 200-350 DEG C in the secondary air duct.
10. the direct-firing pulverized coal combustion system of a kind of medium-speed pulverizer suitable for high-moisture coal according to claim 2,
It is characterized by: the junction of the light phase access secondary air duct is provided with controllable register, for adjusting the air quantity of light phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811037682.8A CN109268866B (en) | 2018-09-06 | 2018-09-06 | Medium speed pulverizer directly blows formula buggy combustion system suitable for high moisture coal type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811037682.8A CN109268866B (en) | 2018-09-06 | 2018-09-06 | Medium speed pulverizer directly blows formula buggy combustion system suitable for high moisture coal type |
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| CN109268866A true CN109268866A (en) | 2019-01-25 |
| CN109268866B CN109268866B (en) | 2020-04-07 |
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| CN201811037682.8A Expired - Fee Related CN109268866B (en) | 2018-09-06 | 2018-09-06 | Medium speed pulverizer directly blows formula buggy combustion system suitable for high moisture coal type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056865A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of combustion system grinding high water content brown coal using medium-speed pulverizer |
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| CN104990097A (en) * | 2015-06-15 | 2015-10-21 | 上海发电设备成套设计研究院 | Method for improving stain coking of burning high-sodium coal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056865A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of combustion system grinding high water content brown coal using medium-speed pulverizer |
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| CN109268866B (en) | 2020-04-07 |
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