CN111744655A - System for increasing output of medium-speed coal mill by pre-drying coal feeding - Google Patents
System for increasing output of medium-speed coal mill by pre-drying coal feeding Download PDFInfo
- Publication number
- CN111744655A CN111744655A CN202010604833.4A CN202010604833A CN111744655A CN 111744655 A CN111744655 A CN 111744655A CN 202010604833 A CN202010604833 A CN 202010604833A CN 111744655 A CN111744655 A CN 111744655A
- Authority
- CN
- China
- Prior art keywords
- coal
- hot air
- disc
- communicated
- mill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 176
- 238000001035 drying Methods 0.000 title claims abstract description 46
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000007790 scraping Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 2
- 238000000227 grinding Methods 0.000 description 8
- 238000003801 milling Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a system for improving the output of a medium-speed coal mill by pre-drying coal feeding, which comprises a central cone, a raw coal bin coal dropping pipe, a medium-speed coal mill, a hot primary air main pipe, an air preheater, a disc and a driving system, wherein the central cone is arranged on the central cone; the central cone is positioned in the raw coal bin, the bottom of the raw coal bin is provided with a pre-drying section, the side wall of the pre-drying section is provided with an annular cavity, the disc is arranged at the outlet of the bottom of the pre-drying section, the central position of the disc is provided with a coal outlet communicated with the upper end of a coal dropping pipe of the raw coal bin, and the lower end of the coal dropping pipe of the raw coal bin is communicated with the inlet of a medium-speed coal mill; the hot primary air main pipe is communicated with a hot air inlet on the side surface of the annular cavity body, and an inlet of the air preheater is communicated with a hot air outlet on the side surface of the annular cavity body; be provided with on the disc and scrape the material arm, actuating system is connected with the disc, and this system can effectively solve the not enough problem of exerting oneself when medium speed pulverizer grinds high moisture coal type.
Description
Technical Field
The invention relates to a system for improving the output of a medium-speed coal mill, in particular to a system for improving the output of the medium-speed coal mill by pre-drying coal feeding.
Background
At present, a large-scale thermal generator set is generally matched with a medium-speed coal mill direct-fired pulverizing system. In order to reduce the purchase cost of fire coal, the coastal power plant in China mainly burns Indonesia coal in a blending mode, the Indonesia coal belongs to lignite with high moisture, low calorific value and low ash melting point, the profitability of the power plant is greatly improved after the Indonesia coal is burnt in the blending mode, but the problems of insufficient output of a medium-speed coal mill, low air temperature at a mill outlet, insufficient load and the like easily occur, wherein the problem of insufficient output of the medium-speed coal mill is the core.
The Indonesia coal is high in moisture, the intermediate speed mill outlet temperature of the blended-burned Indonesia coal can only reach about 60 ℃, combustion in a furnace is not facilitated, high raw coal moisture has great influence on milling output, when the raw coal moisture is more than 30%, the milling output of the intermediate speed mill is greatly reduced, the problem that the intermediate speed mill output is insufficient after the high-moisture coal is blended-burned is prominent no matter the drying output or the milling output, and the problem that the intermediate speed mill output is insufficient aiming at the problem that the intermediate speed mill is not sufficient in milling high-moisture coal quality is mainly solved by the aid of the following technical scheme:
1) aiming at the problem of insufficient drying output. The primary air blower is increased in capacity, primary air quantity is increased, and therefore drying capacity is improved. In order to solve the problem, the patent proposes that primary air at the outlet of the coal mill is subjected to thick-thin separation, a thick phase enters a primary air pipe, a thin phase enters a furnace as secondary air, so that the drying capacity is improved, the primary air rate is reduced, the problems of large air quantity in the mill, coarse coal powder and poor uniformity still exist, and the problem of reduction of milling output cannot be solved because the moisture of raw coal falling into a millstone is still high.
2) Aiming at the problem of insufficient drying output. The drying output is improved by improving the primary air temperature, the heat source mainly comes from high-temperature steam or high-temperature furnace smoke, different patents adopt different heat sources and different heat exchange modes, the purpose is to improve the primary air temperature, the primary air temperature is limited by materials, the maximum primary air temperature is not more than 400 ℃, certain limitation exists, and although the grinding outlet temperature is improved, the problem of grinding output reduction is still not solved.
3) Aiming at the problem of insufficient grinding output. The problem of the reduction of the grinding output caused by the high-moisture coal is generally large in reduction range, the reduction range is difficult to compensate through improvement of the grinding output, and even if the grinding output is improved, the problem is still limited by the problem of insufficient drying output.
In a word, aiming at the problem of insufficient output of the medium-speed coal mill when high-moisture coal seeds are ground, the thought of the prior art is to simply improve the drying capacity and neglect the influence of high moisture on the insufficient output of grinding. In order to solve the problem of insufficient drying output and grinding output at the same time, a fundamental means is to reduce the moisture of the raw coal entering the mill, and a large-scale drying device is arranged in front of a coal feeder. Or part of the hot air is introduced into the coal dropping pipe, but the retention time of the raw coal in the coal dropping pipe is too short, so the effect is very limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system for improving the output of a medium speed coal mill by predrying coal supply, which can effectively solve the problem of insufficient output when the medium speed coal mill mills high-moisture coal.
In order to achieve the purpose, the system for pre-drying coal feeding and improving the output of the medium-speed coal mill comprises a central cone, a raw coal bin coal dropping pipe, the medium-speed coal mill, a hot primary air main pipe, an air preheater, a disc and a driving system;
the central cone is positioned in the raw coal bin, the bottom of the raw coal bin is provided with a pre-drying section, the side wall of the pre-drying section is provided with an annular cavity, the disc is arranged at the outlet of the bottom of the pre-drying section, the central position of the disc is provided with a coal outlet communicated with the upper end of a coal dropping pipe of the raw coal bin, and the lower end of the coal dropping pipe of the raw coal bin is communicated with the inlet of a medium-speed coal mill;
the hot primary air main pipe is communicated with a hot air inlet on the side surface of the annular cavity body, and an inlet of the air preheater is communicated with a hot air outlet on the side surface of the annular cavity body;
the disc is provided with a scraping arm, and the driving system is connected with the disc.
The central cone is of a hollow structure, the top of the central cone is communicated with the suction fan through the moisture absorption pipe, and a mesh type bottom plate is arranged at an opening at the bottom of the central cone.
The raw coal bunker coal dropping pipe is provided with a raw coal bunker coal dropping pipe inserting plate door.
The outlet of the coal dropping pipe of the raw coal bunker is communicated with the medium-speed coal mill through a coal feeder and a coal mill coal dropping pipe.
The hot primary air main pipe is communicated with a hot air inlet on the side surface of the annular cavity body through a hot air inlet pipeline inserting plate door and a hot air quantity adjusting door, wherein a hot air inlet temperature measuring point and a hot air flow measuring point are arranged on a pipeline between the hot air quantity adjusting door and the hot air inlet on the side surface of the annular cavity body.
The air preheater is communicated with a hot air outlet on the side surface of the annular cavity body through a hot air outlet pipeline inserting plate door, and a hot air outlet temperature measuring point is arranged on a pipeline between the hot air outlet pipeline inserting plate door and the hot air outlet on the side surface of the annular cavity body.
An overhaul channel is arranged between the central cone and the raw coal bin.
The driving system comprises a variable frequency motor and a gear set, wherein a bearing is arranged between a coal outlet at the center of the disc and a coal dropping pipe of the raw coal bunker, the gear set is positioned at the bottom of the disc, and the variable frequency motor is connected with a driving shaft of the gear set.
The invention has the following beneficial effects:
when the system for pre-drying and feeding coal and improving the output of the medium-speed coal mill is in specific operation, raw coal enters the pre-drying section through the annular gap between the central cone and the raw coal bin, hot air enters the annular cavity body from the hot air inlet on the side surface of the annular cavity body, and the hot air and the raw coal in the pre-drying section perform indirect heat exchange, then flows out from a hot air outlet on the side surface of the annular cavity body and enters an air preheater, the preheated and dried raw coal enters a medium-speed coal mill, compared with the method that hot air is introduced into a coal dropping pipe for pre-drying, the method has the advantages of longer pre-drying time, better effect, simple and reliable system, easy arrangement, reduction of moisture of coal as fired, reduction of heat loss of smoke exhaust and obvious energy-saving effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view taken along a-a in fig. 1.
The system comprises a raw coal bunker 1, a central cone 2, a mesh-type bottom plate 3, an overhaul channel 4, a pre-drying section 5, a disc 6, a scraping arm 7, a gear set 8, a bearing 9, a variable frequency motor 10, a raw coal bunker coal dropping pipe 11, a raw coal bunker coal dropping pipe 12, a raw coal bunker coal dropping pipe inserting plate door 13, a coal feeder 13, a coal mill coal dropping pipe 14, a medium-speed coal mill 15, a primary hot air main pipe 16, a hot air inlet pipeline inserting plate door 17, a hot air quantity adjusting door 18, a hot air inlet temperature measuring point 19, a hot air flow measuring point 20, a hot air inlet 21, a hot air outlet 22, a hot air outlet temperature measuring point 23, a hot air outlet pipeline inserting plate door 24, an air preheater 25, a moisture absorption pipe 26 and a suction fan 27.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the system for pre-drying coal feeding and improving the output of the medium speed coal mill according to the present invention includes a central cone 2, a raw coal bunker 1, a raw coal bunker coal dropping pipe 11, a medium speed coal mill 15, a hot primary air main pipe 16, an air preheater 25, a disc 6 and a driving system; the central cone 2 is positioned in the raw coal bunker 1, the bottom of the raw coal bunker 1 is provided with a pre-drying section 5, the side wall of the pre-drying section 5 is provided with an annular cavity, the disc 6 is arranged at the bottom outlet of the pre-drying section 5, the central position of the disc 6 is provided with a coal outlet communicated with the upper end of a raw coal bunker coal dropping pipe 11, and the lower end of the raw coal bunker coal dropping pipe 11 is communicated with the inlet of a medium-speed coal mill 15; the primary hot air main pipe 16 is communicated with a hot air inlet 21 on the side surface of the annular cavity, and an inlet of an air preheater 25 is communicated with a hot air outlet 22 on the side surface of the annular cavity; the disc 6 is provided with a scraping arm 7, the driving system is connected with the disc 6, and an overhaul channel 4 is arranged between the central cone 2 and the raw coal bin 1.
The driving system comprises a variable frequency motor 10 and a gear set 8, wherein a bearing 9 is arranged between a coal outlet at the center of the disc 6 and a raw coal bunker coal dropping pipe 11, the gear set 8 is positioned at the bottom of the disc 6, and the variable frequency motor 10 is connected with a driving shaft of the gear set 8.
The invention also comprises a moisture absorption pipe 26 and a suction fan 27, wherein the central cone 2 is of a hollow structure, the top of the central cone 2 is communicated with the suction fan 27 through the moisture absorption pipe 26, and a mesh type bottom plate 3 is arranged at an opening at the bottom of the central cone 2.
A raw coal bunker coal dropping pipe inserting plate door 12 is arranged on the raw coal bunker coal dropping pipe 11; the outlet of the raw coal bunker coal dropping pipe 11 is communicated with a medium-speed coal mill 15 through a coal feeder 13 and a coal mill coal dropping pipe 14.
The primary hot air main pipe 16 is communicated with a hot air inlet 21 on the side surface of the annular cavity body through a hot air inlet pipeline inserting plate door 17 and a hot air quantity adjusting door 18, wherein a hot air inlet temperature measuring point 19 and a hot air flow measuring point 20 are arranged on a pipeline between the hot air quantity adjusting door 18 and the hot air inlet 21 on the side surface of the annular cavity body; the air preheater 25 is communicated with the hot air outlet 22 on the side surface of the annular cavity body through a hot air outlet pipeline inserting plate door 24, and a hot air outlet temperature measuring point 23 is arranged on a pipeline between the hot air outlet pipeline inserting plate door 24 and the hot air outlet 22 on the side surface of the annular cavity body.
The specific working process of the invention is as follows:
raw coal falls into a pre-drying section 5 along an annular cross section between a raw coal bin 1 and a central cone 2, the raw coal is heated in the pre-drying section 5, part of water is evaporated, the pre-dried raw coal slides into a disc 6 along the side wall of the pre-drying section 5, scraping arms 7 are fixedly installed on the disc 6 in pairs, a straight cylinder section at the bottom of the pre-drying section 5 is in sliding seal with the outer side of the disc 6, the disc 6 is connected with a gear set 8 at the bottom of the disc 6, the gear set 8 is connected with a variable frequency motor 10, the variable frequency motor 10 drives the disc 6 to rotate, the disc 6 drives the scraping arms 7 to rotate, the raw coal on the disc 6 is pushed by the scraping arms 7 to move centripetally, the raw coal falls into a coal feeder 13 through a raw coal bin coal dropping pipe 11 and then enters a medium-speed coal mill 15 through a coal mill coal dropping pipe 14, and the pre-dried raw coal can improve the drying output. The heat source of the pre-drying section 5 is hot air from the primary air main pipe 16, the hot air enters the annular cavity from a hot air inlet 21 on the side surface of the annular cavity, indirectly exchanges heat with raw coal in the pre-drying section 5, and then flows out from a hot air outlet 22 on the side surface of the annular cavity and enters an air preheater 25. The hot air quantity adjusting door 18, the hot air inlet temperature measuring point 19, the hot air flow measuring point 20 and the hot air outlet temperature measuring point 23 are used for controlling the drying agent quantity and ensuring that the temperature of the raw coal does not exceed the volatile analysis output temperature. The water vapor evaporated from the raw coal in the pre-drying section 5 enters the inner cavity of the central cone 2 through the mesh type bottom plate 3 and then enters the suction fan 27 through the moisture absorption pipe 26, and the condensed water vapor enters the slag extractor system to be used as water seal or cooling water.
Claims (8)
1. A system for improving the output of a medium-speed coal mill by pre-drying coal feeding is characterized by comprising a central cone (2), a raw coal bin (1), a raw coal bin coal dropping pipe (11), a medium-speed coal mill (15), a hot primary air main pipe (16), an air preheater (25), a disc (6) and a driving system;
the central cone (2) is positioned in the raw coal bin (1), the bottom of the raw coal bin (1) is provided with a pre-drying section (5), the side wall of the pre-drying section (5) is provided with an annular cavity, the disc (6) is arranged at the outlet of the bottom of the pre-drying section (5), the central position of the disc (6) is provided with a coal outlet communicated with the upper end of a raw coal bin coal dropping pipe (11), and the lower end of the raw coal bin coal dropping pipe (11) is communicated with the inlet of a medium-speed coal mill (15);
the hot primary air main pipe (16) is communicated with a hot air inlet (21) on the side surface of the annular cavity body, and an inlet of the air preheater (25) is communicated with a hot air outlet (22) on the side surface of the annular cavity body;
the disc (6) is provided with a scraping arm (7), and the driving system is connected with the disc (6).
2. The system for increasing the output of the medium speed coal mill by pre-drying coal feeding according to claim 1, further comprising a moisture absorption pipe (26) and a suction fan (27), wherein the central cone (2) is of a hollow structure, the top of the central cone (2) is communicated with the suction fan (27) through the moisture absorption pipe (26), and a mesh type bottom plate (3) is arranged at an opening at the bottom of the central cone (2).
3. The system for increasing the output of a medium speed coal mill according to claim 1, wherein the raw coal bunker plug door (12) is arranged on the raw coal bunker pipe (11).
4. The system for increasing the output of a medium speed coal mill according to claim 1, wherein the outlet of the raw coal bunker coal dropping pipe (11) is communicated with the medium speed coal mill (15) through the coal feeder (13) and the coal mill coal dropping pipe (14).
5. The system for increasing the output of the medium speed coal mill according to the claim 1, wherein the hot primary air main pipe (16) is communicated with the hot air inlet (21) on the side of the annular cavity body through a hot air inlet pipeline spile door (17) and a hot air quantity adjusting door (18), wherein a hot air inlet temperature measuring point (19) and a hot air flow measuring point (20) are arranged on the pipeline between the hot air quantity adjusting door (18) and the hot air inlet (21) on the side of the annular cavity body.
6. The system for increasing the output of the medium speed coal mill according to the claim 1, wherein the air preheater (25) is communicated with the hot air outlet (22) on the side surface of the annular cavity through a hot air outlet pipeline spile door (24), and a hot air outlet temperature measuring point (23) is arranged on the pipeline between the hot air outlet pipeline spile door (24) and the hot air outlet (22) on the side surface of the annular cavity.
7. The system for increasing the output of a medium speed coal mill by pre-drying coal feeding according to claim 1, characterized in that a service passage (4) is arranged between the central cone (2) and the raw coal bunker (1).
8. The system for increasing the output of a medium speed coal mill by pre-drying coal feeding according to claim 1, wherein the driving system comprises a variable frequency motor (10) and a gear set (8), wherein a bearing (9) is arranged between the coal outlet at the central position of the disc (6) and the raw coal bunker coal dropping pipe (11), the gear set (8) is positioned at the bottom of the disc (6), and the variable frequency motor (10) is connected with the driving shaft of the gear set (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010604833.4A CN111744655B (en) | 2020-06-29 | 2020-06-29 | System for pre-drying coal feeding and improving output of medium-speed coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010604833.4A CN111744655B (en) | 2020-06-29 | 2020-06-29 | System for pre-drying coal feeding and improving output of medium-speed coal mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111744655A true CN111744655A (en) | 2020-10-09 |
| CN111744655B CN111744655B (en) | 2024-07-09 |
Family
ID=72677975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010604833.4A Active CN111744655B (en) | 2020-06-29 | 2020-06-29 | System for pre-drying coal feeding and improving output of medium-speed coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111744655B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112495555A (en) * | 2020-11-10 | 2021-03-16 | 西安热工研究院有限公司 | Pulverizing system suitable for high-moisture low-density coal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB753529A (en) * | 1953-11-27 | 1956-07-25 | Babcock & Wilcox Ltd | Improvements in or relating to mill installations |
| CN104668043A (en) * | 2015-03-04 | 2015-06-03 | 邹铭 | Coal milling method adopting medium speed coal mill as well as used coal mill |
| JP2017101885A (en) * | 2015-12-02 | 2017-06-08 | 株式会社東芝 | Coal burning boiler and drying method of low grade coal |
| CN209180976U (en) * | 2018-11-20 | 2019-07-30 | 西安热工研究院有限公司 | A kind of device reducing the improvement pulverized coal preparation system operation of boiler fired coal moisture |
| CN212396994U (en) * | 2020-06-29 | 2021-01-26 | 西安西热锅炉环保工程有限公司 | System for increasing output of medium-speed coal mill by pre-drying coal feeding |
-
2020
- 2020-06-29 CN CN202010604833.4A patent/CN111744655B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB753529A (en) * | 1953-11-27 | 1956-07-25 | Babcock & Wilcox Ltd | Improvements in or relating to mill installations |
| CN104668043A (en) * | 2015-03-04 | 2015-06-03 | 邹铭 | Coal milling method adopting medium speed coal mill as well as used coal mill |
| JP2017101885A (en) * | 2015-12-02 | 2017-06-08 | 株式会社東芝 | Coal burning boiler and drying method of low grade coal |
| CN209180976U (en) * | 2018-11-20 | 2019-07-30 | 西安热工研究院有限公司 | A kind of device reducing the improvement pulverized coal preparation system operation of boiler fired coal moisture |
| CN212396994U (en) * | 2020-06-29 | 2021-01-26 | 西安西热锅炉环保工程有限公司 | System for increasing output of medium-speed coal mill by pre-drying coal feeding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112495555A (en) * | 2020-11-10 | 2021-03-16 | 西安热工研究院有限公司 | Pulverizing system suitable for high-moisture low-density coal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111744655B (en) | 2024-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103925605B (en) | Coal dust firing adds the high water content brown coal medium-speed pulverizer pulverized coal preparation system of heat primary air | |
| CN204176665U (en) | The pulverized coal preparation system that medium-speed pulverizer and fan mill combine | |
| CN111412483A (en) | Medium-speed grinding powder system for grinding high-moisture lignite | |
| CN212005752U (en) | Medium-speed grinding powder system for grinding high-moisture lignite | |
| CN203771439U (en) | High-moisture lignite medium speed mill coal pulverizing system using pulverized coal combustion heating primary air | |
| CN212396994U (en) | System for increasing output of medium-speed coal mill by pre-drying coal feeding | |
| CN102889606A (en) | Direct fired pulverizing system of smoke pre-drying lignite steel ball mill | |
| CN111744655A (en) | System for increasing output of medium-speed coal mill by pre-drying coal feeding | |
| CN110404650B (en) | Coal grinding system and method for safely and efficiently preparing lignite | |
| CN203333492U (en) | System for producing pulverized coal by virtue of kiln head waste heat of clinker firing system | |
| CN207394874U (en) | A kind of sludge cooperates with burning processing system | |
| CN203657520U (en) | Novel remaining air utilization system of cement clinker production line | |
| CN203116058U (en) | Zhundong coal sodium-removal pretreatment and smoke fluidization drying medium-speed milling power-processing power generation system | |
| CN213955834U (en) | Lignite drying system for drying lignite by using circulating flue gas | |
| CN213686896U (en) | A concentrate powder process system for high moisture brown coal kind of coal | |
| CN209960469U (en) | Combustion system for cracking biomass solid fuel gas | |
| CN204100278U (en) | The pulverized coal preparation system of direct feed pulverized coal-fan mill and the warehouse style combination of fan mill | |
| CN111853846A (en) | System for improving output of medium-speed coal mill by pre-drying furnace smoke and working method thereof | |
| CN204100275U (en) | The pulverized coal preparation system that Ball Mill and fan mill combine | |
| KR102286906B1 (en) | Method for producing Bio-char using the process of the biomass fired boiler | |
| CN204114984U (en) | With the stove cigarette dry enclosed powder process coal-burning boiler unit that weary air water reclaims | |
| CN113446616A (en) | Power generation system and method for directly burning and coupling biomass briquette fuel by using standby coal mill | |
| CN112393269A (en) | Process for large-proportion coal slime mixed burning of medium storage type coal pulverizing system | |
| CN206688861U (en) | A kind of high-temperature semi-coke grinds system | |
| CN206112978U (en) | A combination formula powder process system that is used for coal and mud coupling burning to generate electricity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |