CN113617471A - System capable of reducing cold air volume of steel ball coal mill - Google Patents
System capable of reducing cold air volume of steel ball coal mill Download PDFInfo
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- CN113617471A CN113617471A CN202110891654.8A CN202110891654A CN113617471A CN 113617471 A CN113617471 A CN 113617471A CN 202110891654 A CN202110891654 A CN 202110891654A CN 113617471 A CN113617471 A CN 113617471A
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- pipe
- coal
- communicated
- steel ball
- cold air
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- 239000003245 coal Substances 0.000 title claims abstract description 152
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000002826 coolant Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 8
- 238000001035 drying Methods 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000007787 solid 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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- 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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- 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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
- F28D7/0016—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being bent
Abstract
The invention relates to a system capable of reducing the cold air quantity of a steel ball coal mill, which comprises a raw coal supply mechanism, a steel ball coal mill, a heat exchanger, a separator component, an air lock, a pulverized coal bin and an air supply component, wherein the raw coal supply mechanism, the steel ball coal mill, the heat exchanger, the separator component, the air lock, the pulverized coal bin and the air supply component are communicated with each other, the air supply component comprises a cold air pipe and a hot air pipe, the cold air pipe and the hot air pipe are communicated with a pipeline between the raw coal supply mechanism and the steel ball coal mill, the hot air pipe is also provided with a cooling component, the cooling component comprises a sleeve body and a spiral pipe, the sleeve body is sleeved on the hot air pipe, and the spiral pipe is arranged in the sleeve body and spirally wound on the hot air pipe. According to the invention, circulating water is used as a heat carrier, and redundant heat in the hot air pipe at the inlet of the coal mill is transferred to the air-powder mixture at the outlet of the coal mill, so that the heat required by drying the coal mill is reduced, and the doping of the cold air quantity of the coal mill is reduced; meanwhile, the circulating water quantity can be controlled according to the coal quality and the unit load parameters, and then the mixing of the cold air quantity is adjusted.
Description
Technical Field
The invention relates to the technical field of coal mills, in particular to a system capable of reducing the amount of cold air of a steel ball coal mill.
Background
The steel ball coal mill is a machine for crushing and grinding coal blocks into coal powder, is an important auxiliary device of a coal powder furnace, the coal grinding process is a process that coal is crushed and the surface area of the coal is continuously increased, new surface area needs to be increased, the binding force between solid molecules needs to be overcome, and therefore energy is consumed, the coal is ball-milled into the coal powder by steel balls in the steel ball coal mill, the coal powder is mainly prepared by three modes of crushing, crushing and grinding, wherein the energy consumed in the crushing process is the most saved, the energy consumed in the grinding process is the most consumed, and various steel ball coal mills have the two or three modes in the pulverizing process, but the type of the coal ball mill is determined mainly according to the type of the steel ball coal mill.
The outlet temperature of the steel ball coal mill is closely related to the economy and safety of a boiler, the outlet temperature of the steel ball coal mill is improved, and the ignition heat can be effectively reduced. In the prior art, hot air is blown in directly to heat the air-powder mixture, however, the hot air is blown in reversely, so that negative pressure is formed in an air-powder pipeline at the outlet of the steel ball coal mill, and auxiliary equipment such as a blower and the like is required to be added for normally discharging the air-powder mixture, thereby causing the problems of greatly increased input cost, increased maintenance cost and the like; moreover, the air-powder mixture has a plurality of volatile components, and the oxygen content and the temperature are increased due to the blowing of hot air, so that the high-volatility coal powder is easy to self-ignite, and extremely high potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a system capable of reducing the amount of cold air of a steel ball coal mill.
In order to achieve the purpose, the invention adopts the technical scheme that:
a system capable of reducing the cold air quantity of a steel ball coal mill comprises a raw coal supply mechanism, a steel ball coal mill communicated with the raw coal supply mechanism, a heat exchanger communicated with the steel ball coal mill, a separator component communicated with the heat exchanger, an air locker communicated with the separator component, a pulverized coal bin communicated with the air locker and an air supply component, wherein the air supply component comprises a cold air pipe and a hot air pipe, one end of the cold air pipe is communicated with a cold air source, one end of the hot air pipe is communicated with a hot air source, the other ends of the cold air pipe and the hot air pipe are communicated with a pipeline between the raw coal supply mechanism and the steel ball coal mill, a cooling component is further arranged on the hot air pipe and comprises a sleeve body and a spiral pipe, the sleeve body is sleeved on the hot air pipe, and the spiral pipe is used for introducing a cooling medium, the spiral pipe is arranged in the sleeve body and spirally wound on the hot air pipe, and the sleeve body is led out from the inlet end and the outlet end of the spiral pipe.
Preferably, the cold air pipe is communicated with the hot air pipe, the cold air pipe is provided with an adjusting valve, and the hot air pipe is provided with stop valves at the upstream and the downstream of the communication position of the cold air pipe.
Preferably, the separator assembly comprises a coarse powder separator and a fine powder separator, the coarse powder separator is communicated with the heat exchanger, the fine powder separator is communicated with the coarse powder separator through a powder feeding pipe, the gas locking device is communicated with the fine powder separator, and a pipeline between the coarse powder separator and the raw coal feeding mechanism and between the coarse powder separator and the steel ball coal mill is communicated through a powder returning pipe.
Preferably, the system further comprises a powder exhauster, an inlet of the powder exhauster is communicated with the fine powder separator through an exhaust pipe, an outlet of the powder exhauster is connected with a tertiary air pipe and a circulating pipe, and the circulating pipe is communicated with a pipeline between the raw coal supply mechanism and the steel ball coal mill.
Further preferably, the exhaust pipe is provided with a regulating valve.
Preferably, the raw coal feeding mechanism and the steel ball coal mill are communicated through a coal dropping pipe.
Preferably, the raw coal supply mechanism comprises a raw coal bin, a coal hopper arranged at the bottom of the raw coal bin, and a coal feeder communicated with the coal hopper, wherein the coal feeder is communicated with the steel ball coal mill.
Preferably, the system further comprises a powder discharge pipe, wherein an adjusting valve is arranged on the powder discharge pipe, and the powder discharge pipe is communicated with the coal powder bin.
Further preferably, the system further comprises a primary air pipe, and the primary air pipe is communicated with the powder discharge pipe.
Preferably, the system further comprises a shunt pipe, wherein an adjusting valve is arranged on the shunt pipe, and the shunt pipe is communicated with a pipeline between the gas locking device and the pulverized coal bin.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, circulating water is used as a heat carrier, and redundant heat in the hot air pipe at the inlet of the coal mill is transferred to the air-powder mixture at the outlet of the coal mill, so that the heat required by drying the coal mill is reduced, and the doping of the cold air quantity of the coal mill is reduced; meanwhile, the circulating water quantity can be controlled according to the coal quality and the unit load parameters, and then the mixing of the cold air quantity is adjusted.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a schematic partial structural diagram of the first embodiment;
FIG. 3 is a schematic partial structural diagram of the first embodiment;
fig. 4 is a schematic partial structural diagram of the first embodiment.
In the above drawings:
10. a raw coal bunker; 11. a coal hopper; 12. a coal feeder; 13. a coal dropping pipe; 2. a steel ball coal mill; 3. a heat exchanger; 40. a coarse powder separator; 41. a fine powder separator; 42. a powder feeding pipe; 43. a powder returning pipe; 50. an air lock; 51. a powder feeding pipe; 52. a shunt tube; 520. an electric control valve; 6. a pulverized coal bunker; 70. a cold air pipe; 700. adjusting a valve; 71. a hot air pipe; 710. a stop valve; 711. a sleeve body; 712. a spiral tube; 80. a powder discharging machine; 81. a gas exhaust pipe; 810. adjusting a valve; 82. a tertiary air pipe; 83. a circulation pipe; 90. a powder discharge pipe; 91. a primary air pipe.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The system for reducing the amount of cold air of the steel ball coal mill as shown in fig. 1 to 4 comprises a raw coal supply mechanism, a steel ball coal mill 2, a heat exchanger 3, a separator assembly, an air locker 50, a pulverized coal bin 6, an air supply assembly and the like. Wherein: the raw coal feeding mechanism is communicated with the steel ball coal mill 2, the heat exchanger 3 is communicated with the steel ball coal mill 2, the separator component is communicated with the heat exchanger 3, the gas locker 5 is communicated with the separator component, and the pulverized coal bin 6 is communicated with the separator component. In this embodiment:
the raw coal supply mechanism comprises a raw coal bin 10, a coal hopper 11 arranged at the bottom of the raw coal bin 10 and a coal feeder 12 communicated with the coal hopper 11, wherein the coal feeder 12 is communicated with an inlet of the steel ball coal mill 2 through a coal dropping pipe 13, and the coal dropping pipe 13 is vertically arranged. The raw coal is conveyed to a coal dropping pipe 13 through a coal hopper 11 and a coal feeder 12, and falls into a steel ball coal mill 2 under the action of gravity to be ground.
The air supply assembly comprises a cold air pipe 70 and a hot air pipe 71, one end of the cold air pipe 70 is communicated with a cold air source and is specifically communicated with an outlet of the primary air fan, one end of the hot air pipe 71 is communicated with a hot air source (280-320 ℃), is specifically communicated with a primary air outlet of the air preheater, and the other ends of the cold air pipe 70 and the hot air pipe 71 are communicated with the coal dropping pipe 13. Specifically, the method comprises the following steps: the cold air pipe 70 is communicated with the hot air pipe 71, and the hot air pipe 71 is communicated with the coal dropping pipe 13. The cold air pipe 70 is provided with an adjusting valve 700 for adjusting the feeding amount of the cold air, and the hot air pipe 71 is provided with stop valves 710 respectively at the upstream and downstream of the connection with the cold air pipe 70.
The hot-blast pipe 71 is further provided with a cooling component, the cooling component comprises a sleeve body 711 and a spiral pipe 712, the sleeve body 711 is sleeved on the hot-blast pipe 711, the spiral pipe 712 is used for introducing a cooling medium such as circulating water, the spiral pipe 712 is arranged in the sleeve body 711 and spirally wound on the hot-blast pipe 71, and the sleeve body 711 is led out from the inlet end and the outlet end of the spiral pipe 712. Circulating water is introduced into the spiral pipe 712, so that the heat required by drying the coal dust in the steel ball coal mill 2 is reduced, and the doping of the cold air quantity in the steel ball coal mill 2 is reduced; meanwhile, the on-line control of the circulating water quantity can be carried out according to the coal quality and the unit load parameters, and then the doping of the cold air quantity is adjusted, if the moisture content in the coal quality is increased, the heat quantity for drying the pulverized coal needs to be increased, the circulating water quantity is reduced by controlling the opening degree of a valve through a manual or automatic control system, and vice versa; when the load of the unit is reduced, the primary air temperature at the inlet of the coal mill is reduced, and the circulating water quantity can be reduced by controlling the opening degree of the valve through a manual or automatic control system, and vice versa.
The separator assembly includes a coarse powder separator 40, a fine powder separator 41. The inlet of the coarse powder separator 40 is communicated with the heat exchanger 3, the outlet of the coarse powder separator 40 is communicated with the inlet of the fine powder separator 41 through a powder feeding pipe 42, the powder return port of the coarse powder separator 40 is communicated with the coal dropping pipe 13 through a powder return pipe 43, and the air lock is communicated with the outlet of the fine powder separator 41.
The airlock 50 communicates with the pulverized coal bunker 6 through a pulverized coal discharge pipe 51. The system also comprises a shunt pipe 52, an electric regulating valve 520 is arranged on the shunt pipe 52, the shunt pipe 52 is communicated with the powder discharging pipe 51, and the shunt pipe 52 can be arranged to be used as an emergency exhaust port after the air lock 50 fails and leaks air, so that the safety of the system is ensured.
The system also comprises a powder exhauster 80, wherein the inlet of the powder exhauster 80 is communicated with the fine powder separator 41 through an exhaust pipe 81, an adjusting valve 810 is arranged on the exhaust pipe 81, the outlet of the powder exhauster 80 is connected with a tertiary air pipe 82 and a circulating pipe 83, and the circulating pipe 83 is communicated with the coal dropping pipe 13.
The system further comprises a powder discharge pipe 90 and a primary air pipe 91, wherein an electric regulating valve is arranged on the powder discharge pipe 90, the powder discharge pipe 90 is communicated with the bottom of the pulverized coal bin 6, the primary air pipe 91 is communicated with the powder discharge pipe 90, and primary air in the primary air pipe carries pulverized coal in the pulverized coal bin to enter the hearth through a pulverized coal pipeline and a burner for combustion.
The following specifically explains the working process of this embodiment:
raw coal enters the steel ball coal mill 2 through the coal dropping pipe 13 for coal milling, and meanwhile, cold air and hot air of the cold air pipe 70 and the hot air pipe 71 are mixed and then enter the steel ball coal mill 2, redundant heat is transferred to an air-powder mixture at the outlet of the steel ball coal mill 2, the air-powder mixture is heated by the heat exchanger 3 and then enters the coarse powder separator 40, the coarse powder separator 40 separates coarse-grained coal powder in the air-powder mixture from the steel ball coal mill 2 and returns to the coal dropping pipe 13 again through the powder returning pipe 43 for regrinding, fine-grained coal powder flows along with the airflow and enters the fine powder separator 41, the fine powder separator 41 separates the coal powder from the airflow, flows into the coal powder bin 6 through the air lock 50 for collection, the exhaust steam separated by the fine powder separator 41 enters the powder exhauster 80 through the exhaust pipe 81, a part of the air flow returns to the coal dropping pipe 13 through the circulating pipe 83 for air flow recirculation, and a part of the air flow is discharged through the tertiary air pipe 82.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a system that can reduce steel ball coal mill cold wind volume which characterized in that: the coal pulverizer comprises a raw coal supply mechanism, a steel ball coal mill communicated with the raw coal supply mechanism, a heat exchanger communicated with the steel ball coal mill, a separator component communicated with the heat exchanger, an air locker communicated with the separator component, a pulverized coal bin communicated with the air locker and an air supply component, wherein the air supply component comprises a cold air pipe and a hot air pipe, one end of the cold air pipe is communicated with a cold air source, one end of the hot air pipe is communicated with a hot air source, the other end of the cold air pipe and the other end of the hot air pipe are communicated with a pipeline between the raw coal supply mechanism and the steel ball coal mill, the hot air pipe is further provided with a cooling component, the cooling component comprises a sleeve body and a spiral pipe, the sleeve body is sleeved on the hot air pipe, the spiral pipe is used for introducing a cooling medium, the spiral pipe is arranged in the sleeve body and spirally wound on the hot air pipe, the sleeve body is led out from the inlet end and the outlet end of the spiral pipe.
2. The system for reducing the amount of cold air in a steel ball mill according to claim 1, wherein: the cold air pipe is communicated with the hot air pipe, an adjusting valve is arranged on the cold air pipe, and stop valves are respectively arranged on the upper stream and the lower stream of the communicated part of the cold air pipe on the hot air pipe.
3. The system for reducing the amount of cold air in a steel ball mill according to claim 1, wherein: the separator component comprises a coarse powder separator and a fine powder separator, the coarse powder separator is communicated with the heat exchanger, the fine powder separator is communicated with the coarse powder separator through a powder feeding pipe, the gas locking device is communicated with the fine powder separator, and pipelines between the coarse powder separator and the raw coal feeding mechanism and the steel ball coal mill are communicated through a powder returning pipe.
4. The system capable of reducing the amount of cold air in a steel ball mill according to claim 3, wherein: the system also comprises a powder exhauster, wherein the inlet of the powder exhauster is communicated with the fine powder separator through an exhaust pipe, the outlet of the powder exhauster is connected with a tertiary air pipe and a circulating pipe, and the circulating pipe is communicated with pipelines between the raw coal supply mechanism and the steel ball coal mill.
5. The system capable of reducing the amount of cold air in a steel ball mill according to claim 4, wherein: the exhaust pipe is provided with an adjusting valve.
6. The system for reducing the cooling air volume of a steel ball coal mill according to claim 1, 3 or 4, is characterized in that: the raw coal feeding mechanism and the steel ball coal mill are communicated through a coal dropping pipe.
7. The system for reducing the amount of cold air in a steel ball mill according to claim 1, wherein: the raw coal supply mechanism comprises a raw coal bin, a coal hopper arranged at the bottom of the raw coal bin and a coal feeder communicated with the coal hopper, and the coal feeder is communicated with the steel ball coal mill.
8. The system for reducing the amount of cold air in a steel ball mill according to claim 1, wherein: the system also comprises a powder discharge pipe, wherein the powder discharge pipe is provided with an adjusting valve, and the powder discharge pipe is communicated with the coal powder bin.
9. The system for reducing the amount of cold air in a steel ball mill according to claim 7, wherein: the system also comprises a primary air pipe, and the primary air pipe is communicated with the powder discharge pipe.
10. The system for reducing the amount of cold air in a steel ball mill according to claim 1, wherein: the system also comprises a shunt pipe, wherein an adjusting valve is arranged on the shunt pipe, and the shunt pipe is communicated with a pipeline between the air locker and the pulverized coal bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110891654.8A CN113617471A (en) | 2021-08-04 | 2021-08-04 | System capable of reducing cold air volume of steel ball coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110891654.8A CN113617471A (en) | 2021-08-04 | 2021-08-04 | System capable of reducing cold air volume of steel ball coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113617471A true CN113617471A (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110891654.8A Pending CN113617471A (en) | 2021-08-04 | 2021-08-04 | System capable of reducing cold air volume of steel ball coal mill |
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| CN (1) | CN113617471A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3253650A (en) * | 1960-07-11 | 1966-05-31 | Frank J Mcentee Jr | Heat-exchange apparatus |
| CN102189024A (en) * | 2010-03-01 | 2011-09-21 | 大唐华银株洲发电有限公司 | Compound pulverizing system based on coal pulverizer |
| CN110194600A (en) * | 2019-06-27 | 2019-09-03 | Oppo广东移动通信有限公司 | Bend glass and preparation method thereof, shell and electronic equipment |
| CN210303913U (en) * | 2019-06-28 | 2020-04-14 | 瑞隆化工（宿州）有限公司 | Sanding device with cooling function |
| CN212493436U (en) * | 2020-07-23 | 2021-02-09 | 北京慧峰仁和科技股份有限公司 | System for reducing cold air volume of coal mill |
| CN212759098U (en) * | 2020-07-15 | 2021-03-23 | 西安热工研究院有限公司 | Coal pulverizer cold air distributing type all spouts system |
| CN213686896U (en) * | 2020-11-19 | 2021-07-13 | 西安热工研究院有限公司 | A concentrate powder process system for high moisture brown coal kind of coal |
-
2021
- 2021-08-04 CN CN202110891654.8A patent/CN113617471A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3253650A (en) * | 1960-07-11 | 1966-05-31 | Frank J Mcentee Jr | Heat-exchange apparatus |
| CN102189024A (en) * | 2010-03-01 | 2011-09-21 | 大唐华银株洲发电有限公司 | Compound pulverizing system based on coal pulverizer |
| CN110194600A (en) * | 2019-06-27 | 2019-09-03 | Oppo广东移动通信有限公司 | Bend glass and preparation method thereof, shell and electronic equipment |
| CN210303913U (en) * | 2019-06-28 | 2020-04-14 | 瑞隆化工（宿州）有限公司 | Sanding device with cooling function |
| CN212759098U (en) * | 2020-07-15 | 2021-03-23 | 西安热工研究院有限公司 | Coal pulverizer cold air distributing type all spouts system |
| CN212493436U (en) * | 2020-07-23 | 2021-02-09 | 北京慧峰仁和科技股份有限公司 | System for reducing cold air volume of coal mill |
| CN213686896U (en) * | 2020-11-19 | 2021-07-13 | 西安热工研究院有限公司 | A concentrate powder process system for high moisture brown coal kind of coal |
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Application publication date: 20211109 |