CN206881826U - Improve the medium-speed pulverizer unit pulverized-coal system contributed with quality of pc - Google Patents
Improve the medium-speed pulverizer unit pulverized-coal system contributed with quality of pc Download PDFInfo
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- CN206881826U CN206881826U CN201720548150.5U CN201720548150U CN206881826U CN 206881826 U CN206881826 U CN 206881826U CN 201720548150 U CN201720548150 U CN 201720548150U CN 206881826 U CN206881826 U CN 206881826U
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- 239000003245 coal Substances 0.000 title claims abstract description 206
- 238000002360 preparation method Methods 0.000 claims abstract description 33
- 238000000227 grinding Methods 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 16
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 239000010881 fly ash Substances 0.000 abstract description 4
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 239000002817 coal dust Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000026676 system process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a kind of medium-speed pulverizer unit pulverized-coal system for improving and contributing with quality of pc, wimble device and coal pulverizer speed governing loop device are oriented to including run coal bin, feeder, medium-speed pulverizer, dynamic separator and the pulverized coal channel being connected with dynamic separator outlet tube cell, and the coal pulverizer being arranged on inside coal pulverizer；The guiding wimble device is circumferentially distributed some floors in the coal pulverizer bottom；The speed governing loop device is the circumferentially distributed annulus for returning powder and boring outer wall in coal pulverizer top dynamic separator；The exit of the dynamic separator is provided with radome fairing；The rod chamber and rodless cavity of the hydraulic cylinder of the coal-grinding machine hydraulic system, are equipped with elastic bag.The utility model improves pulverized coal preparation system and contributes, improve the combustible content of quality of pc (fineness, uniformity and powder amount deviation), reduction unit power consumption of coal pulverizing, reduction boiler fly ash and clinker, improve boiler combustion efficiency；Separate unit coal pulverizer can even running in 30% rated loan condition.
Description
Technical field
It the utility model is related to a kind of medium-speed pulverizer unit pulverized-coal system for improving and contributing with quality of pc, affiliated neck
Domain：The entirety of the important accessory system in thermal power plant puies forward effect power-saving technology.
Background technology
Pulverized coal preparation system is one of the important accessory system in thermal power plant, and its operation conditions directly affects the peace in power plant
Entirely, economical operation.Medium-speed pulverizer unit pulverized-coal system has that simple system, part of appliance are few, occupy little space, invest
The advantages such as less, reliability is high, maintenance is small, operation power consumption is low, turn into the pulverized coal preparation system pattern that thermal power plant generally uses.
Medium-speed pulverizer unit pulverized-coal system operation principle：Fire coal is from run coal bin is delivered to through feeder by coal spout
Speed coal mill mill center, horizontally disposed mill are coal-fired in the presence of mill rotates centrifugal force with certain rotational speed
Along mill radially outward along moving, certain interval between grinding roller and mill be present, between the part of milling of this two groups of relative motions
Coal bed is formed, is squeezed and mills under thrust effect and be ground into coal dust.First air tangentially enters through nozzle ring to be ground
It is interior, raw coal and coal dust are dried, while carry coal dust and move up to separator, after separator selects powder, qualified coal
Powder is sent into hearth combustion through pulverized coal channel, and underproof coal dust passes through back powder cone and comes back to pan-milling, is not easy the debris ground
An air compartment is fallen into through nozzle ring, the screeding device being installed on rotation skirt cover scrapes coal pulverizer and is discharged into stone coal bin.
Power industry standard《Thermal power plant pulverized coal preparation system design computing technique regulation》Clear stipulaties：In selection coal pulverizer
, should be thin according to burning of coal, abrasion, blast characteristics, grindability, the powder characteristic processed of coal pulverizer and coal dust when pattern and pulverized coal preparation system
The requirement of degree, bonded boiler burner hearth and burner structure are unified to be considered.Practical operation situation is that thermal power plant is to reduce production cost
Using mixing burning inferior coal, coal property off-design coal；, part be present in the historical reasons of another medium-speed pulverizer technology transfer
Structure design is unreasonable.Medium speed mill in heat-engine plant unit pulverized-coal system (referring to Fig. 1) generally existing problems with：
(1) pulverized coal preparation system undercapacity：Because actually using the coal property off-design coal of coal, boiler it is specified go out
During power, it is necessary to which put into operation standby coal pulverizer, can not meet power industry standard《Thermal power plant pulverized coal preparation system design computing technique rule
It is fixed》Medium-speed pulverizer pulverized coal preparation system need the regulation of standby 1 coal pulverizer；
(2) coal pulverizer inlet and outlet differential pressure is big：Coal pulverizer internal structure design is unreasonable, and inside has material circulating phenomenon,
Cause coal pulverizer inlet and outlet differential pressure big；
(3) pulverized coal fineness is poor：The exponential average of pulverized coal preparation system pulverized coal fineness influences boiler combustion 0.8~1.0 or so
Efficiency, boiler fly ash and unburned combustible in slag are high；
(4) coal dust deviation is big：The coal dust deviation of the pulverized coal channel of pulverized coal preparation system averagely be more than ± 15%, and《Thermal power generation
Factory's pulverized coal preparation system design computing technique regulation》Clear stipulaties：To pulverized coal preparation system coal pulverizer between each primary air piping of layer burner
Coal dust and air should evenly distribute, its air quantity difference be not more than ± 5%, coal dust deviation be not more than ± 10%；
(5) separator grinding efficiency is low：The coal pulverizer of pulverized coal preparation system generally uses static separation device, Suitability of Coals is poor,
Grinding efficiency is low, coal dust deviation is big；
(6) pulverized coal channel resistance is big：The pulverized coal channel bend design of pulverized coal preparation system is more, and the layering of pulverized coal channel coal dust is tight
Weight, the superposition factor such as coal dust deviation is big cause that pulverized coal channel resistance is big, serious wear；
(7) coal pulverizer underrun is unstable：Coal pulverizer design of Hydraulic System is unreasonable, and separate unit coal pulverizer load is less than
When 40%, coal pulverizer fluctuation of service.
In summary, medium speed mill in heat-engine plant unit pulverized-coal system generally existing problem, it is necessary to carry out structure optimization
And improvement, pulverized coal preparation system is at utmost improved to performances such as the adaptability, pulverized coal preparation system output and quality of pc of coal.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of middling speed coal-grinding that can be improved and contribute with quality of pc
Machine unit pulverized-coal system, it includes run coal bin, feeder, the medium-speed pulverizer provided with hydraulic system being sequentially connected, described
Medium-speed pulverizer top is provided with dynamic separator, the dynamic separator outlet tube cell connection pulverized coal channel.The powder system processed
The coal pulverizer that system also includes being arranged on inside coal pulverizer is oriented to wimble device and coal pulverizer speed governing loop device；
It is circumferentially distributed some arc plates inside the coal pulverizer that the coal pulverizer, which is provided with and is oriented to wimble device,；
It is the circumferentially distributed cyclic structure inside the coal pulverizer that the coal pulverizer, which is provided with speed governing loop device,；
The exit of the dynamic separator is provided with radome fairing；
The rod chamber and rodless cavity of the hydraulic cylinder of the coal-grinding machine hydraulic system, are equipped with elastic bag；
The pulverized coal channel elbow includes right angle section and diversion section.
Further, the coal pulverizer is oriented to wimble device and is arranged on directly over the nozzle ring of the coal pulverizer, and setting angle is
38~85 degree.
Further, the height that the coal pulverizer is oriented to wimble device is 80mm~350mm.
Further, the coal pulverizer speed governing loop device is located at time powder cone outer wall of the separator of the coal pulverizer.
Further, a diameter of 900mm~2500mm of the coal pulverizer speed governing loop device.
The technical solution of the utility model has the beneficial effect that：
The utility model aims to overcome that the deficiencies in the prior art, there is provided a kind of to improve the middling speed contributed with quality of pc
Coal mill straight blowing type milling system, it improves pulverized coal preparation system and contributes, improve pulverized coal fineness index, improve each meal outlet of coal pulverizer
Air quantity difference and coal dust deviation, reduce coal pulverizer unit consumption, reduce primary air fan power consumption, reduce coal pulverizer differential pressure, reduce powder processed
SR, the combustible content for reducing boiler fly ash and clinker；Separate unit coal pulverizer load can be down to 30% nominal output and put down
Steady operation.
Brief description of the drawings
Fig. 1 is the pulverized coal preparation system process flow diagram of non-renovation and improving；
Fig. 2 is pulverized coal preparation system process flow diagram of the present utility model；
Fig. 3 is the schematic diagram that coal pulverizer of the present utility model is oriented to wimble device；
Fig. 4 is the schematic diagram of the dynamic separator of the present utility model with radome fairing；
Fig. 5 is the schematic diagram of coal-grinding machine hydraulic system of the present utility model；
Fig. 6 is the schematic diagram of coal pulverizer speed governing loop device of the present utility model；
Fig. 7 is the schematic diagram of pulverized coal channel of the present utility model.
Wherein, 1 is run coal bin, and 2 be feeder, and 3 be coal pulverizer, and 4 be separator, and 5 be coal-grinding machine hydraulic system, and 6 be stone
Sub- coal bin, 7 be pulverized coal channel, and 8 be boiler furnace, and 9 be that coal pulverizer is oriented to wimble device, and 10 be coal pulverizer speed governing loop device, and 11 are
Separator returns powder cone, and 12 be the nozzle ring of coal pulverizer, and 41 be the radome fairing of dynamic separator, and 42 be dynamic separator body,
51 be Roller of Coal Grinder, and 52 be hydraulic cylinder, and 53 be hydraulic station, and 54 be the elastic bag of rod chamber, and 55 be the elastic gas of rodless cavity
Capsule, 71 be the pulverized coal channel elbow right angle section after the utility model optimization, and 72 be coupled diversion section after right angle section.
Embodiment
To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And specific embodiment is described in detail.
As shown in Fig. 2 the utility model includes run coal bin 1, feeder 2, coal pulverizer 3, the dynamic separator being sequentially connected
4 and with the pulverized coal channel 7 that is connected of dynamic separator outlet tube cell, the coal pulverizer hydraulic pressure system being connected respectively with the coal pulverizer 3
System 5, stone coal bin 6, and the coal pulverizer being arranged on inside coal pulverizer 3 are oriented to wimble device 9 and coal pulverizer speed governing loop device 10.
Referring to Fig. 3, the utility model devises a circle at the surface certain position of nozzle ring 12 of coal pulverizer along surrounding
Guide cone 9.It is circumferentially distributed some arc plates directly over the nozzle ring of the coal pulverizer that the coal pulverizer, which is oriented to wimble device, institute
The height for stating coal pulverizer guiding wimble device is 80mm~350mm, and coal pulverizer spout ring is is in tilted layout, then the coal pulverizer is oriented to
The setting angle of wimble device is 38~85 degree.In original pulverized coal preparation system (shown in Fig. 1), when First air leaves spray with certain wind speed
Coal dust is directly thrown to grinding machine shell by centrifugal force caused by strong eddy flow after choma, on the one hand causes the unordered of a large amount of coal dusts
Circulation, cause extra energy loss, on the other hand a large amount of coal dusts throw to abrasion (this part mill that grinding machine shell causes housing
Damage was avoidable originally), add the workload and cost of system maintenance.Guide cone is wear design, and guide cone is set
Breeze airflow is oriented to mill center by meter in order, and unqualified coal dust is on the one hand led back into mill center in order carries out grinding again,
On the other hand, qualified finished product spreads to grinding machine shell under the influence of centrifugal force after leaving guide cone, and is reaching grinding machine shell
Separator has been put into before body to be classified, has avoided the irregular wear of grinding machine shell, has ensured that the safety of pulverized coal preparation system is steady
Fixed operation.
Referring to Fig. 4, separator is located at the top of coal pulverizer, and main function is to carry out the complete material of grinding inside coal pulverizer
Sorting, qualified products are burnt by Geldart-D particle to boiler furnace, and substandard product is separated after device sorts and returns to coal-grinding
Machine is further milled.It is different from static separation device, the separation principle of dynamic separator be as caused by rotating rotor centrifugal force and
Separation under the drag force collective effect of gas, the fineness for changing coal dust can be realized as only by the rotating speed for changing rotor, point
From efficiency high, and strong vortex be present inside dynamic separator, the vortex of high intensity can promptly will go into separation
The coal dust of device stirs, therefore pulverized coal fineness index is high, coal dust deviation is small.But strong vortex makes separator outlet
It is in high speed rotation state containing breeze airflow, increases the abrasion of downstream pulverized coal channel and extra drag losses.The utility model
Radome fairing is designed with dynamic separator exit, is straight line by being corrected containing breeze airflow by rotating flow for separator outlet is left
Stream, reduce pulverized coal channel abrasion and energy loss.Dynamic separator of the present utility model is to after milling system optimized, coal dust is equal
Even sex index is more than 1.2, and coal dust deviation is less than ± 7%.
Coal-grinding machine hydraulic system only devises air bag in the rod chamber side of hydraulic cylinder at present, after setting operation pressure, by
It is higher in the motion frequency of grinding roller, exchanged between the rodless cavity and hydraulic station of hydraulic cylinder in the presence of frequently hydraulic oil, cause pressure
Fluctuate larger, especially in underload, the bed of material of coal pulverizer material bed is relatively thin, and pressure oscillation is unfavorable for greatly the stabilization of coal pulverizer
Operation.Referring to Fig. 5, positive back-pressure system design of the present utility model, elasticity is designed with the rod chamber and rodless cavity of hydraulic cylinder
Air bag, hydraulic oil only exchange between two elastic bags, and walking path is short, and pressure oscillation is small, ensure that coal pulverizer low negative
Even running during lotus.
Referring to Fig. 6, the utility model sets coal pulverizer speed governing loop device 10 in the outer wall that powder cone is returned positioned at separator, described
Coal pulverizer speed governing loop device is the cyclic structure for returning powder cone outer wall for being distributed in the separator for coal mill.The coal pulverizer speed governing
A diameter of 900mm~2500mm of loop device.Because the powder that returns of separator bores the presence in mill, grinding roller position top and time powder
The irregular change of cross-sectional area between cone, often leads to that wind velocity lift is uneven, i.e., wind speed has phenomenon fluctuated, no
The purpose of stable speedup can be realized.This can cause coal dust to suspend and the interior increased phenomenon of circulation, on the one hand can cause coal pulverizer
Differential pressure increase, First air is caused to convey energy loss, the material phenomenon of collapsing of another aspect suspended material can cause coal pulverizer steady
Fixed operation and the big phenomenon of bed drain purge, cause energy loss and waste of fuel.Using speed ring of the present utility model to coal pulverizer
Internal structure is transformed, and optimizes coal pulverizer interior flow field, thoroughly eliminates above-mentioned un-reasonable phenomenon existing for inside coal pulverizer, drop
Low coal pulverizer differential pressure, reduce energy loss and improve the operation stability of coal pulverizer.
There is one section of distance relatively far away between coal pulverizer and burner, for unit pulverized-coal system, qualified coal dust
Burner is delivered to by longer pulverized coal channel.Pulverized coal channel is usually mounted with a considerable amount of elbows, because pulverized coal particle is straight
Footpath, speed and concentration have difference, and by elbow, the lamination of coal dust can all occur for wind powder air-flow, this directly increases every time
The abrasion of resistance, pulverized coal channel, the power consumption of primary air fan and the combustibility for influenceing burner of system.It is new using this practicality
Type implements Optimizing Reconstruction (such as Fig. 7) to the shape and physical dimension of existing pulverized coal channel elbow, and pulverized coal channel is designed to include
Diversion section 72 after elbow right angle section 71 and right angle, makes the lamination of coal dust in pulverized coal channel be improved, and reduces coal pipe
The abrasion in road, pulverized coal channel crushing is reduced, improve the coal dust distribution of pulverized coal channel outlet, improve boiler combustion efficiency.
The utility model passes through the coal pulverizer internal structure to pulverized coal preparation system, the separator of coal pulverizer, coal pulverizer hydraulic pressure system
System and pulverized coal channel implement targetedly Optimizing Reconstruction, can improve pulverized coal preparation system and contribute, improve pulverized coal fineness index, improve mill
The air quantity difference and coal dust deviation of each meal outlet of coal machine, coal pulverizer unit consumption is reduced, primary air fan power consumption is reduced, reduces coal pulverizer
Differential pressure, the combustible content for reducing pulverized coal preparation system resistance, reducing boiler fly ash and clinker, improve boiler combustion efficiency, one mill
Coal machine load can be down to 30% nominal output and even running.The utility model focus on dissect pulverized coal preparation system internal cause so as to
Thoroughly solve problem, improve pulverized coal preparation system output more than 10%, improve pulverized coal fineness index to more than 1.2, it is inclined to reduce coal dust
Difference (existing is more than ± 15%) arrives less than ± 7%, reduces unburned carbon in flue dust more than 40%.
The utility model will combine the number of fluids of the medium-speed pulverizer unit pulverized-coal system of the applicant's exploitation before design
It is worth analogue technique software CFD, the gas inside the coal pulverizer, separator and pulverized coal channel of pulverized coal preparation system, fixed double phase flow flow field is entered
Row numerical simulation, coal pulverizer, separator and the internal cause in pulverized coal channel flow field for influenceing pulverized coal preparation system are analyzed, calculates coal pulverizer
The detailed installation positions of device such as guide cone, coal pulverizer speed ring, separator, the radome fairing of separator and pulverized coal channel elbow,
The data such as shape and size.By this targetedly Optimizing Reconstruction, optimal optimization can be obtained and carry effect energy saving results.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of principle described in the utility model is not departed from, some improvement and optimization can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with optimization.
Claims (5)
1. improve contribute and quality of pc medium-speed pulverizer unit pulverized-coal system, including be sequentially connected run coal bin, to coal
Machine, the medium-speed pulverizer provided with hydraulic system, the medium-speed pulverizer top are provided with dynamic separator, the dynamic separator
Export tube cell connection pulverized coal channel, it is characterised in that the coal pulverizer that the pulverized coal preparation system also includes being arranged on inside coal pulverizer is led
To wimble device and coal pulverizer speed governing loop device；
It is circumferentially distributed some arc plates inside the coal pulverizer that the coal pulverizer, which is provided with and is oriented to wimble device,；
It is the circumferentially distributed cyclic structure inside the coal pulverizer that the coal pulverizer, which is provided with speed governing loop device,；
The exit of the dynamic separator is provided with radome fairing；
The rod chamber and rodless cavity of the hydraulic cylinder of the coal-grinding machine hydraulic system, are equipped with elastic bag；
The pulverized coal channel elbow includes right angle section and diversion section.
2. pulverized coal preparation system according to claim 1, it is characterised in that the coal pulverizer is oriented to wimble device and is arranged on the mill
Directly over the nozzle ring of coal machine, setting angle is 38~85 degree.
3. pulverized coal preparation system according to claim 1 or 2, it is characterised in that the height that the coal pulverizer is oriented to wimble device is
80mm~350mm.
4. pulverized coal preparation system according to claim 1, it is characterised in that the coal pulverizer speed governing loop device is located at the coal-grinding
The outer wall for returning powder cone of the separator of machine.
5. the pulverized coal preparation system according to claim 1 or 4, it is characterised in that the coal pulverizer speed governing loop device it is a diameter of
900mm~2500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720548150.5U CN206881826U (en) | 2017-05-17 | 2017-05-17 | Improve the medium-speed pulverizer unit pulverized-coal system contributed with quality of pc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720548150.5U CN206881826U (en) | 2017-05-17 | 2017-05-17 | Improve the medium-speed pulverizer unit pulverized-coal system contributed with quality of pc |
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| Publication Number | Publication Date |
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| CN206881826U true CN206881826U (en) | 2018-01-16 |
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ID=61341992
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720548150.5U Active CN206881826U (en) | 2017-05-17 | 2017-05-17 | Improve the medium-speed pulverizer unit pulverized-coal system contributed with quality of pc |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174321A (en) * | 2018-09-28 | 2019-01-11 | 国电龙源节能技术有限公司 | Coal pulverizer automatic regulating system and coal pulverizer Automatic adjustment method |
| CN109210912A (en) * | 2018-09-04 | 2019-01-15 | 北京慧峰仁和科技股份有限公司 | A kind of the center drying system and drying means of medium-speed pulverizer |
| CN113976254A (en) * | 2021-10-20 | 2022-01-28 | 常州市永祥化工有限公司 | Roasting furnace for producing acid from pyrite and energy-saving method |
| CN114314064A (en) * | 2021-11-23 | 2022-04-12 | 河北邯峰发电有限责任公司 | Coal flow shaping equipment for regular output of coal flow of coal feeder |
-
2017
- 2017-05-17 CN CN201720548150.5U patent/CN206881826U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210912A (en) * | 2018-09-04 | 2019-01-15 | 北京慧峰仁和科技股份有限公司 | A kind of the center drying system and drying means of medium-speed pulverizer |
| CN109174321A (en) * | 2018-09-28 | 2019-01-11 | 国电龙源节能技术有限公司 | Coal pulverizer automatic regulating system and coal pulverizer Automatic adjustment method |
| CN113976254A (en) * | 2021-10-20 | 2022-01-28 | 常州市永祥化工有限公司 | Roasting furnace for producing acid from pyrite and energy-saving method |
| CN114314064A (en) * | 2021-11-23 | 2022-04-12 | 河北邯峰发电有限责任公司 | Coal flow shaping equipment for regular output of coal flow of coal feeder |
| CN114314064B (en) * | 2021-11-23 | 2024-01-23 | 河北邯峰发电有限责任公司 | Coal flow shaping equipment for regular output of coal flow of coal feeder |
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