CN104344398B - Middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system - Google Patents
Middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system Download PDFInfo
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- CN104344398B CN104344398B CN201310329965.0A CN201310329965A CN104344398B CN 104344398 B CN104344398 B CN 104344398B CN 201310329965 A CN201310329965 A CN 201310329965A CN 104344398 B CN104344398 B CN 104344398B
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- 239000003245 coal Substances 0.000 title claims abstract description 97
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 95
- 239000002817 coal dust Substances 0.000 claims abstract description 34
- 230000006835 compression Effects 0.000 claims abstract description 19
- 238000007906 compression Methods 0.000 claims abstract description 19
- 230000008676 import Effects 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 abstract description 19
- 239000010881 fly ash Substances 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 25
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000007599 discharging Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004899 motility Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 210000004894 snout Anatomy 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Air Transport Of Granular Materials (AREA)
Abstract
The open a kind of middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system of the present invention, the outlet of its tertiary air connects weary Flash Gas Compression Skid System；Weary Flash Gas Compression Skid System includes efficient cyclone and the air and powder mixer being arranged in parallel；Boiler is provided with fire air nozzle, and tertiary air outlet is simultaneously connected with efficient cyclone and air and powder mixer；The air outlet of efficient cyclone connects fire air nozzle, and its discharge connects the coal dust import of air and powder mixer, and the wind powder mixed export of air and powder mixer connects tertiary air spout.The coal powder density of the tertiary air that the present invention sends into boiler furnace is higher, reduces the interference for main combustion zone.And, in tertiary air fire air nozzle arranged above, make unburnt coal dust at further after-flame herein, reduce unburned combustible in fly ash.Visible, this system forms the deep-graded of air in boiler furnace, also reduces the discharge capacity of furnace outlet NOx, reduces the operating cost of the circulating reduction systems such as SCR.
Description
Technical field
The present invention relates to boiler technology field, particularly to warehouse formula pulverized coal carried by hot air pulverized coal preparation system in the middle of one.
Background technology
Refer to the schematic diagram that Fig. 1, Fig. 1 are a kind of typical middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system.
This system mainly includes feeder 11, coal pulverizer 12, wood block separator 13, mill separator 14, pulverized-coal collector
15, Pulverized Coal Bin 16, burner 102, boiler 10, and primary air fan 1b, pressure fan 1a.
Operation principle approximately as:
Feeder 11 carries raw coal and makes coal dust to coal pulverizer 12, coal pulverizer 12, through wood block separator 13, mill separator
14, after pulverized-coal collector 15, the coal dust of about about 85% is separated and falls in Pulverized Coal Bin 16, and primary air fan 1b carries
First air the coal dust in Pulverized Coal Bin 16 can be transported to burning in boiler 10.The generally powder process amount of coal pulverizer 12 need not and pot
Stove 10 fuel quantity is consistent, has certain independence, when boiler 10 load variations, can be regulated by machine supplying powder 17.
Pressure fan 1a feeding secondary wind, mixes in boiler 10 with First air, and the burning for coal dust provides oxygen, and can add
The disturbance of air blast, promotes the backflow of high-temperature flue gas, promotes the mixing of combustible and oxygen, for offer condition of burning completely.
It addition, after major part coal dust is separated, be referred to as weary gas through pulverized-coal collector 15 gas out, weary gas also have big
The coal dust of about about 10%, uses as tertiary air.Weary gas, after Powder discharging fan, tertiary air case, is directly entered and is arranged on boiler
Tertiary air spout 101 on 10, tertiary air spout 101 is arranged at the top of the main combustion zone of boiler 10, then tertiary air is at boiler 10
Burn above main combustion zone.
But, such scheme still suffers from following technical problem:
Tertiary air coal powder density is low, and the burning for main combustion zone has certain interference, makes main combustion zone oxygen concentration
Higher, thus cause furnace outlet NOx (nitrogen oxides) discharge capacity height, SCR (going back original system) operating cost higher.It addition, three
Secondary wind also causes boiler 10 efficiency of combustion on the low side, and fly ash combustible material is higher, it is impossible to adapt to the environment protectment protection of increasingly stringent.
In view of this, how to improve powder feeding pulverized coal preparation system, to reduce the tertiary air interference to main combustion zone, reduce NOx row
High-volume, reduce fly ash combustible material, be those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
For solving above-mentioned technical problem, the purpose of the present invention is a kind of middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system of offer,
This system can reduce the tertiary air interference to main combustion zone, reduces NOx discharge, and reduces fly ash combustible material.
The middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system that the present invention provides, exports including boiler and tertiary air, described boiler
Being provided with tertiary air spout, the outlet of described tertiary air connects weary Flash Gas Compression Skid System；Described weary Flash Gas Compression Skid System includes being arranged in parallel
Efficient cyclone and air and powder mixer；Described boiler is provided with fire air nozzle, and the outlet of described tertiary air is simultaneously connected with described height
Effect separator and described air and powder mixer；The air outlet of described efficient cyclone connects described fire air nozzle, its discharge
Connecting the coal dust import of described air and powder mixer, the wind powder mixed export of described air and powder mixer connects described tertiary air spout.
The work process of this powder feeding pulverized coal preparation system is: tertiary air is divided into two-way, and a road enters efficient cyclone, after separation
It is practically free of the gas of coal dust as burnout degree, in fire air nozzle is admitted to boiler furnace；One tunnel enters wind powder separator,
Separate the microfine coal mixing of acquisition with colleges and universities separators, the coal powder density of mixed tertiary air improves relatively, through tertiary air
Spout is admitted in boiler furnace.Knowable to above-mentioned work process, the tertiary air on the low side compared to concentration in background technology, this
The coal powder density of the tertiary air of bright feeding boiler furnace is higher, thus reduce for main combustion zone so around interference, improve
The stability of burning.And, in tertiary air fire air nozzle arranged above, utilize the gas of tertiary air isolated as after-flame
Wind uses, and makes unburnt coal dust at further after-flame herein, reduces unburned combustible in fly ash.Visible, this system is at boiler
Freeze profile becomes the deep-graded of air, also reduces the discharge capacity of furnace outlet NOx, reduces the circulating reduction systems such as SCR
Operating cost.
Preferably, described weary Flash Gas Compression Skid System also includes weary bottle coal powder cabin；The described discharge of described efficient cyclone
The described coal dust import of described air and powder mixer, and described weary bottle coal powder cabin and described wind powder is connected by described weary bottle coal powder cabin
It is provided with powder adjustable valve between the coal dust import of blender.
Can be according to the opening of actual condition regulation powder adjustable valve, the tertiary air actually entering tertiary air spout with regulation is dense
Degree so that it is can adapt with burner hearth current loads, reach clean-burning purpose.
Preferably, described powder adjustable valve is electric lock pneumatic device.
The volume of electric lock pneumatic device is little, reliable operation, and seal and anti-wear performance good, be suitable to the control of pulverized coal flow, and
Electric-linked control can be realized with other parts of system, improve automaticity.
Preferably, described efficient cyclone is sack cleaner or efficient cyclone separator.
These two kinds of separators are prone to arrange, the working environment of suitable coal dust.
Preferably, described weary Flash Gas Compression Skid System also includes booster fan；The air outlet of described efficient cyclone is by described
Booster fan connects described fire air nozzle.
Booster fan contributes to as burnout degree, the wind being practically free of coal dust separated is sent into fire air nozzle, and
Entrance the burnout degree air quantity of fire air nozzle, wind speed can be regulated, the interference to main combustion zone can be reduced further, and can strengthen
The motility of system fading margin, reaches in time to adjust the purpose of burnout degree air quantity according to fact.
Preferably, described weary Flash Gas Compression Skid System also includes air door；Described air door is located at described booster fan air inlet and institute
State on the path of efficient cyclone air outlet.
This air door can control to enter the air quantity of booster fan, improves the motility of air quantity regulation further.
Preferably, described efficient cyclone, described both air and powder mixers, at least one is logical with the outlet of described tertiary air
Road is provided with air door.
Air door can control the air quantity of tertiary air, then can control to enter efficient cyclone, the air quantity of air and powder mixer.
Preferably, the secondary wind pipeline of this system connects described fire air nozzle.
The wind of what secondary wind was separated with efficient cyclone be practically free of coal dust mixes, as burnout degree and send into burner hearth
In.According to the isolated air quantity of efficient cyclone, mixed secondary wind air quantity can be regulated, to obtain suitable burnout degree
Air quantity；It addition, secondary wind is usually hot blast, the temperature of burnout degree can be regulated, in order to avoid the burnout degree impact burning that temperature is too low
Efficiency, disturbs main combustion zone.
Preferably, the secondary wind pipeline of this system connects described tertiary air spout.
Secondary wind both scalable enter the tertiary air air quantity of burner hearth, can also adjust its temperature.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of typical middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system；
Fig. 2 is the schematic diagram of middle warehouse formula a kind of specific embodiment of pulverized coal carried by hot air pulverized coal preparation system provided by the present invention；
Fig. 3 is the structural representation of weary Flash Gas Compression Skid System in Fig. 2.
In Fig. 1:
11 feeders, 12 coal pulverizers, 13 wood block separators, 14 mill separators, 15 pulverized-coal collectors, 16 Pulverized Coal Bin, 17
Machine supplying powder, 10 boilers, 101 tertiary air spouts, 102 burners, 1a pressure fan, 1b primary air fan；
In Fig. 2-3: 21 feeders, 22 down drying pipes, 23 coal pulverizers, 24 wood block separators, 25 mill separators, 26 thin
Powder separator, 27 Pulverized Coal Bin, 271 machine supplying powders, 281 the 4th air doors, 282 main road Powder discharging fans, 283 tertiary air casees, 29 main road wind
Powder mixer, 30 weary Flash Gas Compression Skid Systems, 301 efficient cyclones, 302 air and powder mixers, 303 weary bottle coal powder cabin, 304 electric lock pneumatics
Device, 305 booster fans, 306 first air doors, 307 second air doors, 308 the 3rd air doors, 309 the 4th air doors, 20 boilers, 201 after-flames
Wind snout, 202 tertiary air spouts, 203 burners, 2a pressure fan, 2b primary air fan, 2c air preheater, 2d secondary air box,
2d1 the 5th air door, 2d2 the 6th air door
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, real with concrete below in conjunction with the accompanying drawings
The present invention is described in further detail to execute example.
Refer to Fig. 2-3, Fig. 2 is middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system one specific embodiment provided by the present invention
Schematic diagram；Fig. 3 is the structural representation of weary Flash Gas Compression Skid System in Fig. 2.
Powder feeding pulverized coal preparation system in this embodiment, exports including boiler 20 and tertiary air, and boiler 20 is provided with tertiary air spout
202.Can understand in conjunction with background technology, the air outlet of tertiary air outlet generally pulverized-coal collector 26.In Fig. 2, this powder feeding powder process
System includes feeder 21, coal pulverizer 23, mill separator 25, pulverized-coal collector 26 and Pulverized Coal Bin 27, feeder 21 coal supply
To coal pulverizer 23, coal pulverizer 23 can be entered back into through down drying pipe 22, to keep being dried of coal.
The coal dust made mainly carries under the First air effect that primary air fan 2b provides, and (also may be used through mill separator 25
Wood block separator 24 was set before mill separator 25, carries out just point), pulverized-coal collector 26, after separation, major part coal dust falls
Enter in Pulverized Coal Bin 27, after mixing in the main road air and powder mixer 29 of tertiary air with First air, send into burner 203；And after separating
The weary band of gas have a small amount of coal dust, as tertiary air discharge pulverized-coal collector 26, the air outlet of pulverized-coal collector 26 is tertiary air
Outlet.Certainly, when using other segregation apparatus separation coal dusts, tertiary air outlet the most correspondingly changes.Coal in Pulverized Coal Bin 27
Powder amount need not consistent with boiler oil amount, can be controlled the supply of coal dust by machine supplying powder 271.
Tertiary air outlet in the present embodiment connects weary Flash Gas Compression Skid System 30, and the tertiary air i.e. discharged need to fill through weary gas disposal
Put 30 process.Weary Flash Gas Compression Skid System 30 includes efficient cyclone 301 and the air and powder mixer 302, i.e. high efficiency separation being arranged in parallel
Device 301 and air and powder mixer 302 are in two branch roads.The tertiary air of low concentration can be separated by efficient cyclone 301 further, can
Isolating the microfine coal of about more than 99.5%, isolated gas is then practically free of coal dust.It is capable of this kind efficiently
The separator separated, can be sack cleaner or efficient cyclone separator, and these two kinds of separators are prone to arrange, suitably this kind of work
Condition, it is of course also possible to select other efficient separators.
Tertiary air outlet is simultaneously connected with efficient cyclone 301 and the branch road at air and powder mixer 302 place, then discharged
Wind carries out separation of air from dust through efficient cyclone 301 in three times, and another part tertiary air enters air and powder mixer 302.And efficiently divide
Discharge from device 301 connects the coal dust import of air and powder mixer 302, and the coal dust that i.e. efficient cyclone 301 is separated can
Enter in air and powder mixer 302, carry out wind powder with the tertiary air of another part and mix.It addition, boiler 20 is provided with burnout degree spray
Mouth 201, fire air nozzle 201 is located on tertiary air spout 202, and tertiary air spout 202 is positioned on main combustion zone.Wherein,
The air outlet of efficient cyclone 301 connects fire air nozzle 201, and the wind powder mixed export of air and powder mixer 302 connects tertiary air
Spout 202.
The work process of this powder feeding pulverized coal preparation system is:
Tertiary air is divided into two-way, and a road enters efficient cyclone 301, and the gas being practically free of coal dust after separation is as combustion
Wind to the greatest extent, in fire air nozzle 201 is admitted to boiler 20 burner hearth；
One tunnel enters air and powder mixer 302, separates the microfine coal mixing of acquisition with efficient cyclone 301, mixed
The coal powder density of tertiary air improves relatively, in tertiary air spout 202 is admitted to boiler 20 burner hearth.
Knowable to above-mentioned work process, the tertiary air on the low side compared to concentration in background technology, the present embodiment is sent into pot
The coal powder density of the tertiary air of stove 20 burner hearth is higher, thus reduces the interference burnt for main combustion zone, improves burning
Stability.And, in tertiary air fire air nozzle arranged above 201, utilize the gas of tertiary air isolated as burnout degree
Use, make unburnt coal dust at further after-flame herein, reduce unburned combustible in fly ash.Visible, this system is at boiler 20
Freeze profile becomes the deep-graded of air, also reduces the discharge capacity of furnace outlet NOx, reduces the circulating reduction systems such as SCR
Operating cost.
Further, weary Flash Gas Compression Skid System 30 can also include weary bottle coal powder cabin 303, as in figure 2 it is shown, efficient cyclone
The discharge of 301 can connect the coal dust import of air and powder mixer 302 by weary bottle coal powder cabin 303, and weary bottle coal powder cabin 303 with
It is provided with powder adjustable valve between the coal dust import of air and powder mixer 302.The coal dust then separated by efficient cyclone 301 is advanced
Enter weary bottle coal powder cabin 303 to store, the regulation of powder adjustable valve enter the powder amount of air and powder mixer 302.It is so designed that, can be according to reality
The opening of border regulating working conditions powder adjustable valve, actually enters the tertiary air concentration of tertiary air spout 202 so that it is Neng Gouyu with regulation
Burner hearth current loads adapts, and reaches clean-burning purpose.
Powder adjustable valve can be specifically electric lock pneumatic device 304, and the volume of electric lock pneumatic device 304 is little, reliable operation, and close
Envelope and anti-wear performance are good, are suitable to the control of pulverized coal flow, and can realize electric-linked control with other parts of system, improve certainly
Dynamicization degree.Certainly, it is also feasible for using the common valve body that can adjust openings of sizes.
For above-described embodiment, weary Flash Gas Compression Skid System 30 can also include booster fan 305, and efficient cyclone 301
Air outlet connects fire air nozzle 201 by booster fan 305.Booster fan 305 contributes to being practically free of of separating
The wind of coal dust as burnout degree send into fire air nozzle 201, and can regulate enter fire air nozzle 201 burnout degree air quantity,
Wind speed, can reduce the interference to main combustion zone further, and can strengthen the motility of system fading margin, reaches in time according to fact
Adjust the purpose of burnout degree air quantity.First air door can be set on the path of the air outlet of booster fan 305 and efficient cyclone 301
306, to control to enter the air quantity of booster fan 305, improve the motility of air quantity regulation further.
It addition, efficient cyclone 301, both air and powder mixers 302, the path that at least one exports with tertiary air is provided with
Air door.Air door can control the air quantity of tertiary air, then can control to enter efficient cyclone 301, the wind of air and powder mixer 302
Amount.As in figure 2 it is shown, efficient cyclone 301 and air and powder mixer 302 are respectively equipped with the second air door on the branch road of tertiary air outlet
307 and the 3rd air door 308, the regulation of two air doors is the most flexible, independent.It is appreciated that and only air door is set on a branch road,
The allocation proportion of air quantity can also be regulated.Regulation for air quantity has numerous form, such as, when being introduced into weary Flash Gas Compression Skid System 30
When the coal dust content of tertiary air before is of a relatively high, the air quantity entering efficient cyclone 301 can be reduced；Otherwise, the most permissible
Reduce the air quantity entering air and powder mixer 302.Certainly, during practical adjustments, it is also possible to combine tertiary air Actual combustion demand,
The factor regulation tertiary air allocation proportions between efficient cyclone 301, air and powder mixer 302 such as burner hearth actual load.
Except the airdoor control by being arranged on branch road enters efficient cyclone 301, the air quantity of air and powder mixer 302,
Air door and Powder discharging fan, the 4th air door 281 as shown in Figure 2 and main road Powder discharging fan is may also set up on the main road of tertiary air
282, scalable enters efficient cyclone 301, the total blast volume of air and powder mixer 302.Also can set after main road Powder discharging fan 282
Put tertiary air case 283, to coordinate main road Powder discharging fan 282, improve the air blast effect of blower fan.
For the various embodiments described above, the secondary wind pipeline of this system can connect fire air nozzle 201.As in figure 2 it is shown, such
The powder process powder feed system of type be typically provided pressure fan 2a, secondary air box 2d with formed and feeding secondary wind, secondary wind is typically passed through
Air preheater 2c is heated to be hot blast, and First air part passes through air preheater 2c, heating.Secondary wind and First air are at boiler 20
Interior mixing, improves efficiency of combustion.Herein, part secondary wind also can enter fire air nozzle 201 through secondary wind pipeline, with efficient point
The wind mixing being practically free of coal dust separated from device 301, as burnout degree and send in burner hearth.According to efficient cyclone
301 isolated air quantity, can regulate mixed secondary wind air quantity, to obtain suitable burnout degree air quantity；It addition, secondary
Wind is usually hot blast, and relatively low from the temperature of the tertiary air of tertiary air outlet discharge, secondary wind is isolated with efficient cyclone 301
Wind mixes, it is also possible to the temperature of regulation burnout degree, in order to avoid the too low burnout degree of temperature affects efficiency of combustion, disturbs main combustion zone.
Now, booster fan 305 can arrange the 4th air door 309, when not having weary gas on the path of fire air nozzle 201
Time, the 4th air door 309 can be closed, directly provided burnout degree by secondary wind pipeline.
Secondary wind pipeline also can connect tertiary air spout 202, as shown in Figure 2.In the present embodiment at tertiary air spout 202
Tertiary air comes from air and powder mixer 302, similar to the above, and secondary wind both scalable enter the tertiary air air quantity of burner hearth, also may be used
Regulate its temperature.
Secondary wind pipeline, with on the path of fire air nozzle 201 and/or tertiary air spout 202, can arrange air door, such as figure
The 5th air door 2d1 shown in 2 and the 6th air door 2d2.Air door can regulate entrance fire air nozzle 201 and/or tertiary air spout
The air quantity of 202, so that the air quantity after Tiao Jie adapts with actual condition.
Above a kind of middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system provided by the present invention is described in detail.Herein
In apply specific case principle and the embodiment of the present invention be set forth, the explanation of above example is only intended to side
Assistant solves method and the core concept thereof of the present invention.It should be pointed out that, for those skilled in the art, not
On the premise of departing from the principle of the invention, it is also possible to the present invention is carried out some improvement and modification, these improve and modification also falls into
In the protection domain of the claims in the present invention.
Claims (9)
1. a warehouse formula pulverized coal carried by hot air pulverized coal preparation system in the middle of, exports including boiler (20) and tertiary air, and described boiler (20) sets
There is tertiary air spout (202), it is characterised in that the outlet of described tertiary air connects weary Flash Gas Compression Skid System (30)；Described weary gas disposal
Device (30) includes efficient cyclone (301) and the air and powder mixer (302) being arranged in parallel；
Described boiler (20) is provided with fire air nozzle (201), and the outlet of described tertiary air is simultaneously connected with described efficient cyclone
And described air and powder mixer (302) (301)；The air outlet of described efficient cyclone (301) connects described fire air nozzle
(201), its discharge connects the coal dust import of described air and powder mixer (302), and the wind powder of described air and powder mixer (302) mixes
Close outlet and connect described tertiary air spout (202).
2. middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as claimed in claim 1, it is characterised in that described weary Flash Gas Compression Skid System
(30) weary bottle coal powder cabin (303) is also included；The described discharge of described efficient cyclone (301) is by described weary bottle coal powder cabin
(303) connect the described coal dust import of described air and powder mixer (302), and described weary bottle coal powder cabin (303) is mixed with described wind powder
It is provided with powder adjustable valve between the coal dust import of clutch (302).
3. middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as claimed in claim 2, it is characterised in that described powder adjustable valve is
Electric lock pneumatic device (304).
4. middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as claimed in claim 1, it is characterised in that described efficient cyclone
(301) it is sack cleaner or efficient cyclone separator.
5. middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as claimed in claim 1, it is characterised in that described weary Flash Gas Compression Skid System
(30) booster fan (305) is also included；The air outlet of described efficient cyclone (301) is connected by described booster fan (305)
Described fire air nozzle (201).
6. middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as claimed in claim 5, it is characterised in that described weary Flash Gas Compression Skid System
(30) air door is also included；Described air door is located at described booster fan (305) air inlet and described efficient cyclone (301) air outlet
Path on.
7. middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as claimed in claim 1, it is characterised in that described efficient cyclone
(301), described air and powder mixer (302) the two, the path of at least one and described tertiary air outlet is provided with air door.
8. the middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as described in any one of claim 1-7, it is characterised in that this system
Secondary wind pipeline connects described fire air nozzle (201).
9. the middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system as described in any one of claim 1-7, it is characterised in that this system
Secondary wind pipeline connects described tertiary air spout (202).
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| CN104776440B (en) * | 2015-04-23 | 2017-10-24 | 西安西热锅炉环保工程有限公司 | The multi-functional powder feed system of warehouse formula in the middle of low speed coal mill |
| CN104913328B (en) * | 2015-05-14 | 2018-05-04 | 芜湖鸣人热能设备有限公司 | A kind of industrial furnace is delivered coal mechanism |
| CN107327832B (en) * | 2017-02-27 | 2019-07-09 | 上海发电设备成套设计研究院 | The ultra-low load steady for improving boiler combustion characteristic for fired power generating unit fires system |
| CN107327833B (en) * | 2017-08-15 | 2023-11-07 | 长沙理工大学 | Low NO of boiler powder process exhaust gas x Combustion system |
| CN108443907A (en) * | 2018-04-04 | 2018-08-24 | 武汉武锅能源工程有限公司 | A kind of pulverized coal preparation system and its milling method of medium-speed pulverizer warehouse formula pulverized-coal fired boiler |
| CN109798516A (en) * | 2019-01-08 | 2019-05-24 | 武汉耀立环保工程有限公司 | The warehouse style pulverized coal carried by hot air method of efficient low-discharging and its system |
| CN110285442A (en) * | 2019-06-24 | 2019-09-27 | 亿利洁能科技（宿迁）有限公司 | Fine coal ash handling equipment |
| CN110645566B (en) * | 2019-10-28 | 2024-10-01 | 江苏蓝创环保科技有限公司 | Tertiary air treatment system and technology for coal-fired boiler |
| CN114673986A (en) * | 2022-03-24 | 2022-06-28 | 西安热工研究院有限公司 | System for improving powder burnout performance of tertiary air zone |
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