CN110834969A - Automatic sediment collecting system that arranges of coal pulverizer stone coal - Google Patents
Automatic sediment collecting system that arranges of coal pulverizer stone coal Download PDFInfo
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- CN110834969A CN110834969A CN201911098307.9A CN201911098307A CN110834969A CN 110834969 A CN110834969 A CN 110834969A CN 201911098307 A CN201911098307 A CN 201911098307A CN 110834969 A CN110834969 A CN 110834969A
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- coal
- fan
- purging
- manual valve
- pebble
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
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- 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
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- 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
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
-
- 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
- B02C23/40—Adding fluid, other than for crushing or disintegrating by fluid energy with more than one means for adding fluid to the material being crushed or disintegrated
Abstract
The invention discloses an automatic slag discharging and collecting system for pebble coal of a coal mill, which comprises a coal hopper, wherein an automatic collecting structure is arranged on the coal hopper; the automatic collection structure mainly comprises: the device comprises a first movable baffle, a coal dropping pipe, a second movable baffle, a purging air channel, a cold air purging structure, a collecting box and a plurality of spray headers with the same structure; the invention relates to the technical field of pebble coal collecting devices, which are simple in structure, convenient to install and use, low in maintenance cost, simple in maintenance and low in failure rate, the possibility of spontaneous combustion of pebble coal is reduced, and the safe operation of a coal pulverizing system is ensured.
Description
Technical Field
The invention relates to the technical field of pebble coal collecting devices, in particular to an automatic slag discharging and collecting system for pebble coal of a coal mill.
Background
At present, coal is generally used as a raw material for power generation in most thermal power plants, and is crushed by a coal mill before entering a boiler for combustion, so that the fineness of coal powder entering the boiler is controlled within a relatively economic range, and an optimal combustion effect is achieved. With the continuous increase of coal price, in order to reduce the production cost, the thermal power plant mostly adopts a mode of mixing and burning inferior coal for burning, so that the quantity of pebble coal of the coal mill is increased. In the existing powder making system, most power plants adopt a buffer box type local slag discharging system, and the slag discharging mode is local discharging and manual clearing. Pebble coal generally has a relatively high temperature and often undergoes spontaneous combustion events. And because the stone coal is seriously dusted in the final deslagging and transferring processes, the environment is polluted, and the health of workers is influenced.
In view of the defects, the automatic slag discharging and collecting system for the pebble coal of the coal mill is researched, and the pebble coal discharging environment can be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an automatic slag discharging and collecting system for pebble coal of a coal mill, which solves the problems that most power plants adopt a buffer box type local slag discharging system in the existing coal pulverizing system, and the slag discharging mode is local discharging and manual clearing. Pebble coal generally has a relatively high temperature and often undergoes spontaneous combustion events. And because the stone coal is seriously dusted in the final deslagging and transferring processes, the stone coal not only pollutes the surrounding environment, but also influences the physical health of workers.
In order to achieve the purpose, the invention is realized by the following technical scheme: a coal pulverizer pebble coal automatic slag discharging and collecting system comprises a coal dropping hopper, wherein an automatic collecting structure is arranged on the coal dropping hopper;
the automatic collection structure mainly comprises: the device comprises a first movable baffle, a coal dropping pipe, a second movable baffle, a purging air channel, a cold air purging structure, a collecting box and a plurality of spray headers with the same structure;
the first movable baffle is movably mounted at one end of the coal dropping hopper, the coal dropping pipe is mounted at one end of the coal dropping hopper, the second movable baffle is movably mounted at one end of the coal dropping pipe, the purging air channel is mounted at one end of the coal dropping pipe, the cold air purging structure is mounted at one end of the purging air channel, the collecting box is mounted at the other end of the purging air channel, and the plurality of spray heads are mounted at the upper end of the inner side of the purging air channel and the upper end of the inner side of the collecting box.
Preferably, the cold air blowing structure mainly comprises: the device comprises an air duct main pipe manual valve, a three-way air duct, a first fan outlet manual valve, a second fan outlet manual valve, a first fan outlet check valve, a second fan outlet check valve, a first purging fan and a second purging fan;
the utility model discloses a manual valve of wind channel, including female pipe of wind channel, manual valve of first fan export, manual valve of second fan export, first fan export check valve, second fan export check valve, first fan export check valve is installed in first fan export check valve one end, the second fan is blown the fan and is installed in second fan export check valve one end, the second is blown the fan and is installed in second fan export check valve one end.
Preferably, a fixed inclined plate is arranged in the coal hopper, the bottom of the fixed inclined plate and the bottom of the coal hopper are on the same horizontal plane, and the coal pipe is of a smooth parabolic structure.
Preferably, a plurality of spray headers all have a smoke temperature detection function.
Preferably, the upper end of the collection box is provided with a dust suppression cover.
Preferably, soundproof cotton is installed at the upper end of the collecting box.
Advantageous effects
The invention provides an automatic slag discharging and collecting system for pebble coal of a coal mill, which has the advantages that the automatic discharging can be realized when the coal slag in an ash hopper is accumulated to a certain amount, the potential safety hazard in production is avoided, the efficiency of slag material conveying can be effectively ensured, the labor intensity of slag discharging personnel is reduced, the pollution to the surrounding environment is reduced, the coal slag with heat is cooled, fly ash is pressed, a good working environment is created, the structure is simple, the installation and the use are convenient, the maintenance cost is extremely low, the maintenance is simple, the fault rate is low, the possibility of spontaneous combustion of the pebble coal is reduced, and the safe operation of a powder preparation system is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an automatic slag discharge and collection system for pebble coal of a coal mill according to the present invention.
Fig. 2 is a left side sectional structural schematic view of a spray header of the automatic slag discharging and collecting system for pebble coal of a coal mill.
FIG. 3 is a schematic right sectional view of a second movable baffle of the automatic slag discharging and collecting system for pebble coal of a coal mill according to the present invention.
FIG. 4 is a partially enlarged schematic structural diagram of the automatic slag discharging and collecting system for pebble coal of a coal mill shown in FIG. 1 according to the present invention.
In the figure: 1-a coal hopper; 2-a first flapper; 3-a coal dropping pipe; 4-a second flapper; 5-a purging air channel; 6-a collection box; 7-a spray header; 8-air duct main pipe manual valve; 9-a three-way air duct; 10-a first fan outlet manual valve; 11-a second fan outlet manual valve; 12-a first fan outlet check valve; 13-a second fan outlet check valve; 14-a first purge fan; 15-a second purge fan; 16-a fixed sloping plate; 17-dust suppression cover; 18-soundproof cotton.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-4, the present invention provides a technical solution: a coal pulverizer pebble coal automatic slag discharging and collecting system comprises a coal hopper 1, wherein an automatic collecting structure is arranged on the coal hopper 1; the automatic collection structure mainly comprises: the device comprises a first movable baffle 2, a coal dropping pipe 3, a second movable baffle 4, a purging air channel 5, a cold air purging structure, a collecting box 6 and a plurality of spray headers 7 with the same structure; the first movable baffle 2 is movably arranged at one end of the coal dropping hopper 1, the coal dropping pipe 3 is arranged at one end of the coal dropping hopper 1, the second movable baffle 4 is movably arranged at one end of the coal dropping pipe 3, the purging air channel 5 is arranged at one end of the coal dropping pipe 3, the cold air purging structure is arranged at one end of the purging air channel 5, the collecting box 6 is arranged at the other end of the purging air channel 5, and the plurality of spray headers 7 are all arranged at the upper end of the inner side of the purging air channel 5 and the upper end of the; the cold wind sweeps the structure and mainly includes: the device comprises an air duct main pipe manual valve 8, a three-way air duct 9, a first fan outlet manual valve 10, a second fan outlet manual valve 11, a first fan outlet check valve 12, a second fan outlet check valve 13, a first purging fan 14 and a second purging fan 15; the manual valve 8 of the air channel main pipe is arranged at one end of the purging air channel 5, one end of a single channel of the three-way air channel 9 is arranged at one end of the manual valve 8 of the air channel main pipe, the manual valve 10 of the first fan outlet is arranged at one end of a double channel of the three-way air channel 9, the manual valve 11 of the second fan outlet is arranged at the other end of the double channel of the three-way air channel 9, the check valve 12 of the first fan outlet is arranged at one end of the manual valve 10 of the first fan outlet, the check valve 13 of the second fan outlet is arranged at one end of the manual valve 11 of the second fan outlet, the first purging fan 14 is arranged at one end of; a fixed inclined plate 16 is arranged in the coal hopper 1, the bottom position of the fixed inclined plate 16 and the bottom position of the coal hopper 1 are on the same horizontal plane, and the coal dropping pipe 3 is of a smooth parabolic structure; the plurality of spray headers 7 have a smoke temperature detection function; the upper end of the collecting box 6 is provided with a dust suppression cover 17; the upper end of the collecting box 6 is provided with soundproof cotton 18.
Example (b): the coal falling hopper 1 is arranged at a discharge port of the coal mill, pebble coal generated by the coal mill is primarily collected through the coal falling hopper 1, preferably, a fixed inclined plate 16 is arranged in the coal falling hopper 1, the bottom position of the fixed inclined plate 16 and the bottom position of the coal falling hopper 1 are in the same horizontal plane, the fallen pebble coal can be timely and rapidly collected to the position of the first movable baffle 2, when a certain pebble coal amount is exceeded, the first movable baffle 2 is pushed open, the pebble coal falls into the coal falling pipe 3, the pebble coal at the lower part of the coal falling pipe 3 pushes open the second movable plate, the first movable baffle 2 and the second movable baffle 4 are both fixed at the upper parts and movable at the lower ends, and have certain weight, so that the pebble coal can rapidly and smoothly fall down and air in the air blowing duct 5 can be prevented from returning to the coal mill, the air blowing structure continuously blows the air duct 5, and the pebble coal has certain temperature after falling, the cooling effect is achieved while the cold air is blown and swept, and the falling pebble coal gradually moves towards the collecting box 6 under the driving of the air pressure and finally falls into the collecting box 6. Meanwhile, under the effect of the cold air blowing structure, the pebble coal is cooled, the spontaneous combustion probability is effectively reduced, a plurality of spray headers 7 are arranged in an air pipeline, a collecting box 6 is common to all coal mills, a plurality of spray headers 7 are also arranged at the upper part of the air pipeline, the plurality of spray headers 7 are in a hot standby state when in normal work, preferably, a plurality of spray headers 7 have a smoke temperature detection function, when the pebble coal generates smoke, fire and the like in the pipeline or the collecting box 6, the pebble coal can be automatically put into operation, automatic spraying can be realized, when the pebble coal automatically fails, a manual operation mode can be switched, an operator manually puts into use, preferably, a dust suppression cover 17 is arranged at the upper part of the collecting box 6, air in the blowing air channel 5 is timely discharged, meanwhile, the discharge of fly ash in the collecting box 6 can be suppressed, soundproof cotton 18 is arranged at the upper end of the collecting box 6, the soundproof cotton 18 can well eliminate noise caused by exhaust air, so that the whole system can operate in a lower decibel environment.
The first fan outlet manual valve 10, the second fan outlet manual valve 11, the first fan outlet check valve 12, the second fan outlet check valve 13, the first purging fan 14, the second purging fan 15 and the purging air duct 5 are fixed on the ground but are higher than the ground by a certain height. And a first purging fan 14 and a second purging fan 15 with proper capacities are selected for purging, so that the pressure in the purging air channel 5 is lower than the air pressure in the coal mill, and meanwhile, the pebble coal purging output can be ensured. When the fan works normally, one fan runs, the outlet door of the other fan is opened, and the standby state is kept. An interlocking logic is arranged between the first purging fan 14 and the second purging fan 15, and when the pressure of the purging air duct 5 is lower than a set value or the operating fan trips, the standby fan is started in an interlocking mode to maintain the normal operation of the system. The isolation of the system and the adjustment of the air quantity can be realized through the manual valve 8 of the air duct main pipe, and the normal operation of the fan is ensured while the output is met.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A coal pulverizer pebble coal automatic slag discharging and collecting system comprises a coal dropping hopper (1), and is characterized in that an automatic collecting structure is arranged on the coal dropping hopper (1);
the automatic collection structure mainly comprises: the device comprises a first movable baffle (2), a coal dropping pipe (3), a second movable baffle (4), a purging air channel (5), a cold air purging structure, a collecting box (6) and a plurality of spray headers (7) with the same structure;
the coal blowing device is characterized in that the first movable baffle (2) is movably arranged at one end of the coal dropping hopper (1), the coal dropping pipe (3) is arranged at one end of the coal dropping hopper (1), the second movable baffle (4) is movably arranged at one end of the coal dropping pipe (3), the blowing air channel (5) is arranged at one end of the coal dropping pipe (3), the cold air blowing structure is arranged at one end of the blowing air channel (5), the collecting box (6) is arranged at the other end of the blowing air channel (5), and the spray headers (7) are all arranged at the inner upper end of the blowing air channel (5) and the inner upper end of the collecting box (6).
2. The coal pulverizer pebble coal automatic slag discharge and collection system of claim 1, wherein the cold air blowing structure mainly comprises: the device comprises an air duct main pipe manual valve (8), a three-way air duct (9), a first fan outlet manual valve (10), a second fan outlet manual valve (11), a first fan outlet check valve (12), a second fan outlet check valve (13), a first purging fan (14) and a second purging fan (15);
female pipe manual valve (8) in wind channel are installed in purging wind channel (5) one end, three-way wind channel (9) single channel one end is installed in female pipe manual valve (8) one end in wind channel, manual valve (10) in first fan export are installed in three-way wind channel (9) binary channels one end, manual valve (11) in second fan export are installed in three-way wind channel (9) the binary channels other end, manual valve (10) one end in first fan export is installed in first fan export check valve (12), manual valve (11) one end in second fan export is installed in second fan export check valve (13), first fan (14) of purging are installed in first fan export check valve (12) one end, second fan (15) of purging are installed in second fan export check valve (13) one end.
3. The automatic slag-discharging and collecting system for pebble coal of a coal mill as claimed in claim 1, wherein a fixed inclined plate (16) is arranged inside the coal hopper (1), the bottom position of the fixed inclined plate (16) and the bottom position of the coal hopper (1) are on the same horizontal plane, and the coal dropping pipe (3) is of a smooth parabolic structure.
4. The automatic slag discharge and collection system for pebble coal of a coal mill as claimed in claim 1, wherein a plurality of the spray headers (7) have a smoke temperature detection function.
5. The automatic slag-discharging and collecting system for the pebble coal of the coal mill as claimed in claim 1, wherein a dust suppression cover (17) is arranged at the upper end of the collecting box (6).
6. The automatic slag discharge and collection system for pebble coal of a coal mill as claimed in claim 1, wherein the collection box (6) is provided with soundproof cotton (18) at the upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098307.9A CN110834969B (en) | 2019-11-12 | 2019-11-12 | Automatic sediment collecting system that arranges of coal pulverizer stone coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098307.9A CN110834969B (en) | 2019-11-12 | 2019-11-12 | Automatic sediment collecting system that arranges of coal pulverizer stone coal |
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| Publication Number | Publication Date |
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| CN110834969A true CN110834969A (en) | 2020-02-25 |
| CN110834969B CN110834969B (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911098307.9A Active CN110834969B (en) | 2019-11-12 | 2019-11-12 | Automatic sediment collecting system that arranges of coal pulverizer stone coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526165A (en) * | 2021-07-15 | 2021-10-22 | 神华北电胜利能源有限公司 | Coal pulverizer discharge system |
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