CN110898975A - Coal crushing device for thermal power plant - Google Patents
Coal crushing device for thermal power plant Download PDFInfo
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- CN110898975A CN110898975A CN201911248314.2A CN201911248314A CN110898975A CN 110898975 A CN110898975 A CN 110898975A CN 201911248314 A CN201911248314 A CN 201911248314A CN 110898975 A CN110898975 A CN 110898975A
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- coal
- separation chamber
- discharge
- pipe
- thermal power
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- 239000003245 coal Substances 0.000 title claims abstract description 119
- 238000000926 separation method Methods 0.000 claims abstract description 59
- 238000003756 stirring Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000012216 screening Methods 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims 9
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 17
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000003818 cinder Substances 0.000 description 24
- 239000002817 coal dust Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000004484 Briquette Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 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
- B02C23/08—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
-
- 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
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a coal crushing device of a thermal power plant, which comprises a crushing part positioned at the upper part of the device, wherein the top end of the crushing part is provided with a feeding hopper, the lower part of the crushing part is sequentially provided with a first screening mechanism for lifting larger coal blocks and a second screening mechanism for separating powdery coal blocks, and a powder removing mechanism for removing coal powder on the surfaces of the coal blocks is arranged at a discharge port corresponding to the second screening mechanism. According to the invention, the guide plate with the convex arc structure is arranged at the upper part of the inner side of the separation chamber, so that coal blocks falling into the separation chamber are dispersed to the edge of the separation chamber under the action of the guide plate, meanwhile, the first stirring impeller continuously rotates and stirs, so that coal powder and smaller coal blocks pass through the net-shaped structure below the separation chamber, and larger coal blocks gradually move to the top end of the second feeding pipe under the stirring of the first stirring impeller until entering the second feeding pipe and falling into the discharging chamber, and finally pass through the first discharging pipe discharging device, so that the blocking phenomenon is avoided.
Description
Technical Field
The invention relates to the technical field of coal crushing equipment, in particular to a coal crushing device for a thermal power plant.
Background
When a power plant generates electricity by using coal, the requirement on the quality of the coal is high, and the particle size, the dryness and the like of the coal have great influence on the economy and the reliability of coal combustion, so that a crushing device for the coal for thermal power generation is important.
The patent document with publication number CN108787137A provides a pulverized coal reducing mechanism of thermal power factory, utilizes gravity to carry out the primary crushing to the coal cinder through broken dish, and the coal cinder after the breakage gets into reducing mechanism through the screening opening and carries out the breakage once more, and the coal cinder of accomplishing the secondary breakage sends to the discharge gate through the conveyer belt, accomplishes whole crushing process after the water spray of hole for water jet spun, but this kind of technical scheme has the following problem:
1. in the first crushing process, incompletely crushed or un-crushed coal cannot enter the crushing device through the screening hole, so that coal blocks are accumulated in the first crushing chamber, and when the coal blocks added again by the crushing disc are crushed, gravitational potential energy is transmitted layer by layer until the gravitational potential energy is applied to the coal blocks at the lowest layer, which cannot pass through the screening hole, are still difficult to crush, so that the coal blocks are finally accumulated in the first crushing chamber;
2. the coal briquette can generate more powdered coal dust after being crushed twice, the powdered coal dust is mixed in the crushed coal briquette, the powdered coal is difficult to completely remove only by water sprayed at a discharge port, and if the sprayed water is too much, the humidity of the coal briquette can be too high, the combustion efficiency of the coal is influenced or the coal briquette needs to be treated again by a subsequent drying process;
3. the sprayed water is not quantitatively controlled, so that the uniform humidity of the coal blocks is difficult to ensure, and the uniform use and treatment of the coal blocks are inconvenient.
Disclosure of Invention
The invention aims to provide a coal crushing device for a thermal power plant, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a coal crushing device of thermal power factory, is including the crushing portion that is located device upper portion, the top of crushing portion is equipped with the feeding funnel, the lower part of crushing portion has set gradually the first screening mechanism that is used for proposing great coal cinder and has been used for separating the second screening mechanism of likepowder coal cinder, the discharge gate department that the second screening mechanism corresponds is equipped with the gumming mechanism that is used for getting rid of coal cinder surface buggy.
Wherein the first screening mechanism comprises a separation chamber positioned at the inner side of the device, the top of the separation chamber is communicated with the discharge end of the crushing part through a first feeding pipe, the upper part of the inner side of the separation chamber is provided with a guide plate with an arc structure, the edge of the material guide plate is fixedly connected with the inner wall of the separation chamber through a plurality of fixing pieces, the bottom surface of the separation chamber is of a net structure, a second feeding pipe is inserted in the middle of the bottom surface of the separation chamber, a first stirring impeller is arranged at the end part of the second feeding pipe positioned in the separation chamber, the bottom end of the second feeding pipe extends to a discharge chamber positioned below the separation chamber, the end part of the second feeding pipe, which is positioned inside the discharging chamber, is in transmission connection with a transmission shaft, the transmission shaft penetrates through the device and is in transmission connection with a driving device below the device, one side of the lower part of the discharge chamber is provided with a first discharge pipe, and the discharge end of the first discharge pipe is positioned on the outer side of the device.
The second screening mechanism comprises a screen, the screen is connected with the inner wall of the device through a plurality of vibration devices, and the screen is connected with the inner wall of the device through a first leakage-proof plate.
The screen cloth is passed to the row of material room, and is equipped with the second leak protection board between screen cloth and the row of material room, the cross section of first leak protection board and second leak protection board is the wave structure.
The transmission shaft is sleeved with a second stirring impeller at the position close to the lower part of the inner side of the device, a second discharge pipe is arranged on the bottom surface of the device, and the second discharge pipe is communicated with the device.
Wherein, gumming mechanism is including the bellows that corresponds the discharge gate, one side that the device was kept away from to the bellows is equipped with the third discharging pipe, the bottom surface of bellows is connected with the air-supply line, the top surface of bellows is connected with out the tuber pipe, the air-out end and the gumming device intercommunication of going out the tuber pipe.
Wherein, the bellows sets up for the slope, and the air-supply line all is perpendicular with the face that corresponds on the bellows with the play tuber pipe, the inboard bottom surface of bellows is equipped with the screen frame of bellied convex structure with the junction of air-supply line, the junction that goes out the tuber pipe and bellows is equipped with the fan housing, the inboard of fan housing is equipped with the block.
And sealing components are arranged at the matching part of the separation chamber and the second feeding pipe and the matching part of the second feeding pipe and the discharge chamber.
Wherein, the bottom surface of the separation chamber, the bottom surface of the discharge chamber and the bottom surface of the inner side of the device are all of a middle convex structure.
Wherein, the screen cloth sets up for the slope, and the extreme lower position of screen cloth corresponds the discharge gate.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the crushed coal enters the separation chamber through the first feeding pipe, in order to prevent the coal from directly falling into the second feeding pipe, a guide plate with a convex circular arc structure is arranged at the position, corresponding to the discharge end of the first feeding pipe, on the upper part of the inner side of the separation chamber, so that the coal falling into the separation chamber is dispersed to the edge of the separation chamber under the action of the guide plate, meanwhile, the first stirring impeller continuously rotates and stirs, so that the coal powder and smaller coal pass through a net structure below the separation chamber, and larger coal gradually moves to the top end of the second feeding pipe under the stirring of the first stirring impeller until entering the second feeding pipe and falling into the discharge chamber, finally, the first stirring impeller is connected with the end part of the second feeding pipe through the discharge device of the first discharging pipe, and the end part of the second feeding pipe, which is positioned inside the discharge chamber, is connected with the transmission shaft and driven by the driving device, thereby realizing the stirring action of the first stirring impeller.
2. According to the invention, the coal dust and the smaller coal blocks which pass through the net-shaped structure below the separation chamber fall to the screen, the screen screens the coal blocks and the coal dust under the action of the vibration device, the coal blocks which are subjected to airing enter the air box through the discharge hole, and the coal dust falls into the bottom of the device and is rapidly discharged from the second discharge pipe under the action of the second stirring impeller.
3. According to the invention, when coal blocks falling into the air box pass through the convex arc-shaped screen cover, the coal blocks can be blown by airflow blown out from the air inlet pipe, coal dust infected on the coal blocks sequentially passes through the air cover and the air outlet pipe along the airflow and enters the powder removing device, the powder removing device adopts a centrifugal dust remover, the coal dust is collected after the coal dust is removed, and the coal blocks after the dust removal are discharged through the third discharge pipe, so that the coal blocks for thermal power generation are prepared.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of a material guide plate according to the present invention;
FIG. 3 is a schematic view of the structure of the separation chamber according to the present invention;
fig. 4 is a schematic view of the structure of the mesh screen of the present invention;
FIG. 5 is a schematic cross-sectional view of a second anti-leakage plate according to the present invention;
FIG. 6 is a schematic view showing the connection relationship between the second feeding pipe and the transmission shaft according to the present invention;
FIG. 7 is a schematic structural view of a windbox in the present invention;
FIG. 8 is a schematic view of the internal structure of the windbox of the present invention.
In the figure: 1. a crushing section; 2. a hopper; 3. a separation chamber; 4. a first feed pipe; 5. a material guide plate; 6. a fixing member; 7. a second feed tube; 8. a first stirring impeller; 9. a discharge chamber; 10. a drive shaft; 11. a drive device; 12. a first discharge pipe; 13. screening a screen; 14. a vibration device; 15. a first leakage prevention plate; 16. a second leakage prevention plate; 17. a second stirring impeller; 18. a second discharge pipe; 19. an air box; 20. a third discharge pipe; 21. an air inlet pipe; 22. an air outlet pipe; 23. a mesh enclosure; 24. a fan housing; 25. blocking; 26. and (7) sealing the assembly.
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. 1-8, the present invention provides a technical solution: the utility model provides a coal crushing device of thermal power factory, is equipped with hopper 2 including the crushing portion 1 that is located device upper portion, the top of crushing portion 1, and the lower part of crushing portion 1 has set gradually the first screening mechanism that is used for proposing great coal cinder and has been used for separating the second screening mechanism of likepowder coal cinder, and the discharge gate department that the second screening mechanism corresponds is equipped with the gumming mechanism that is used for getting rid of coal cinder surface buggy.
Adding raw coal blocks into a feeding hopper 2, enabling the raw coal blocks to fall into a crushing part 1, enabling a crushing mechanism to adopt a jaw crushing structure, setting crushing particle sizes, enabling the crushed coal blocks to sequentially enter a first screening mechanism and a second screening mechanism below, and finally processing in a powder removing mechanism at a discharge port, so that the coal blocks used for thermal power generation can be achieved.
Broken coal blocks enter the separation chamber 3 through the first feeding pipe 4, in order to prevent the coal blocks from directly falling into the second feeding pipe 7, a guide plate 5 with a convex circular arc structure is arranged at the position, corresponding to the discharge end of the first feeding pipe 4, on the upper part of the inner side of the separation chamber 3, so that the coal blocks falling into the separation chamber 3 are dispersed to the edge of the separation chamber 3 under the action of the guide plate 5, meanwhile, the first stirring impeller 8 continuously rotates and stirs, so that coal powder and smaller coal blocks pass through a net structure below the separation chamber 3, larger coal blocks gradually move to the top end of the second feeding pipe 7 under the stirring of the first stirring impeller 8 until entering the second feeding pipe 7 and falling into the discharge chamber 9, finally, the discharge device passes through the first discharge pipe 12, meanwhile, the first stirring impeller 8 is connected with the end part of the second feeding pipe 7, and the end part, positioned on the inner side of the discharge chamber 9, of the second feeding pipe 7 is connected with the transmission shaft 10, and is driven by the driving device 11 to realize the stirring action of the first stirring impeller 8.
The coal dust and the smaller coal blocks which pass through the net structure below the separation chamber 3 fall to the screen 13, the screen 13 screens the coal blocks and the coal dust under the action of the vibration device 14, the coal blocks which are aired enter the air box 19 through the discharge hole, and the coal dust falls into the bottom of the device and is quickly discharged from the second discharge pipe 18 under the action of the second stirring impeller 17.
When coal blocks falling into the air box 19 pass through the convex arc-shaped screen cover 23, the coal blocks can be blown by airflow blown out from the air inlet pipe 21, coal dust stained on the coal blocks sequentially passes through the air cover 24 and the air outlet pipe 22 along the airflow and enters the powder removing device, the powder removing device adopts a centrifugal dust remover, the coal dust is collected after the coal dust is removed, the coal blocks after the dust removal are discharged through the third discharge pipe 20, and then the coal blocks for thermal power generation are prepared.
Wherein, the first screening mechanism comprises a separation chamber 3 positioned at the inner side of the device, the top of the separation chamber 3 is communicated with the discharge end of the crushing part 1 through a first feeding pipe 4, the upper part of the inner side of the separation chamber 3 is provided with a guide plate 5 with an arc structure, the edge of the guide plate 5 is fixedly connected with the inner wall of the separation chamber 3 through a plurality of fixing pieces 6, the bottom surface of the separation chamber 3 is of a net structure, the middle part of the bottom surface of the separation chamber 3 is inserted with a second feeding pipe 7, the end part of the second feeding pipe 7 positioned in the separation chamber 3 is provided with a first stirring impeller 8, the bottom end of the second feeding pipe 7 extends to a discharge chamber 9 positioned below the separation chamber 3, the end part of the second feeding pipe 7 positioned at the inner side of the discharge chamber 9 is in transmission connection with a transmission shaft 10, the transmission shaft 10 penetrates through the device and is in transmission connection with a driving device 11 below the device, one side, and the discharge end of first discharging pipe 12 is located the outside of device, first screening mechanism, the buggy after the breakage, less coal cinder and great coal cinder separation, and carry out the secondary breakage with great coal cinder eduction gear, drive first impeller 8 through drive arrangement 11 and rotate, can stir accumulational coal cinder on the one hand, the network structure of 3 bottom surfaces of separation chamber is passed through with higher speed buggy and less coal cinder, on the other hand, because the design of blade and second conveying pipe 7 vertically on the first impeller 8, make great coal cinder when receiving the effect of blade, change and get into in second conveying pipe 7, improve the discharge efficiency that great does not sink the piece.
Wherein, the second screening mechanism includes screen cloth 13, and screen cloth 13 is connected through the inner wall of a plurality of vibrator 14 with the device, is connected through first leak protection board 15 between screen cloth 13 and the device inner wall, because screen cloth 13 and device inner wall have the clearance, consequently seals this gap through first leak protection board 15, avoids leaking the material.
Wherein, row's material room 9 passes screen cloth 13, and is equipped with second leak protection board 16 between screen cloth 13 and the row's material room 9, and first leak protection board 15 and second leak protection board 16's cross section is the wave structure, compares in locating the below position of arranging material room 9 with screen cloth 13, and this scheme save assembly's inner space more, and reduce the volume of device greatly to do not influence the screening effect, arrange the vibrations interval of 16 compensation screen cloth 13 of second leak protection board between material room 9 and the screen cloth 13.
Wherein, the transmission shaft 10 is equipped with the second impeller 17 near the inboard lower part cover of device, and the bottom surface of device is equipped with second discharging pipe 18, and second discharging pipe 18 communicates with the device, discharges the buggy under the auxiliary action of second impeller 17 fast.
Wherein, the gumming mechanism is including the bellows 19 that corresponds the discharge gate, one side that bellows 19 kept away from the device is equipped with third discharging pipe 20, bellows 19's bottom surface is connected with air-supply line 21, bellows 19's top surface is connected with out tuber pipe 22, the air-out end and the gumming device intercommunication of play tuber pipe 22, adopt the buggy that the coal cinder surface was got rid of to wind, can accomplish taking out of buggy, also can not take out under high velocity air, then the coal cinder also is difficult to take away by the air current when burning, consequently can not produce the pollution problem, and compare in the washing, it is more high-efficient that wind removes the buggy, and can not improve the humidity of coal cinder, do not need subsequent processing, the buggy after the processing is changeed.
Wherein, bellows 19 is the slope setting, and air-supply line 21 and play tuber pipe 22 all are perpendicular with the face that corresponds on the bellows 19, and the inboard bottom surface of bellows 19 is equipped with bellied circular arc structure's gauze mask 23 with the junction of air-supply line 21, and the junction of going out tuber pipe 22 and bellows 19 is equipped with fan housing 24, and the inboard of fan housing 24 is equipped with blocks net 25, and bellows 19 slope setting even if under the too big condition of wind-force, the coal cinder is difficult for blowing in out tuber pipe 22 to gauze mask 23, fan housing 24 can guarantee that the coal cinder can not leak away at bellows 19.
Wherein, the cooperation department of separation chamber 3 and second conveying pipe 7, the cooperation department of second conveying pipe 7 and row material chamber 9 all are equipped with seal assembly 26, guarantee that second conveying pipe 7 also can keep a sealed state with separation chamber 3 and row material chamber 9 in the motion process, avoid appearing leaking the material phenomenon.
Wherein, the bottom surface of separation chamber 3, the bottom surface of row material room 9 and the inboard bottom surface of device are middle part protruding structure, and the protruding structure of separation chamber 3 bottom surface makes buggy and less coal cinder can not discharge through second conveying pipe 7, and only great coal cinder can just discharge through second conveying pipe 7, improves the quality of separation.
Wherein, screen cloth 13 sets up for the slope, and screen cloth 13's the lowest position corresponds the discharge gate, improves screening efficiency, and the screen cloth 13 that the slope set up not only makes the coal cinder shake, can also make the coal cinder roll on screen cloth 13, and the ejection of compact is faster, can not be on screen cloth 13 windrow.
The working principle is as follows: broken coal blocks enter the separation chamber 3 through the first feeding pipe 4, in order to prevent the coal blocks from directly falling into the second feeding pipe 7, a guide plate 5 with a convex circular arc structure is arranged at the position, corresponding to the discharge end of the first feeding pipe 4, on the upper part of the inner side of the separation chamber 3, so that the coal blocks falling into the separation chamber 3 are dispersed to the edge of the separation chamber 3 under the action of the guide plate 5, meanwhile, the first stirring impeller 8 continuously rotates and stirs, so that coal powder and smaller coal blocks pass through a net structure below the separation chamber 3, larger coal blocks gradually move to the top end of the second feeding pipe 7 under the stirring of the first stirring impeller 8 until entering the second feeding pipe 7 and falling into the discharge chamber 9, finally, the discharge device passes through the first discharge pipe 12, meanwhile, the first stirring impeller 8 is connected with the end part of the second feeding pipe 7, and the end part, positioned on the inner side of the discharge chamber 9, of the second feeding pipe 7 is connected with the transmission shaft 10, and is driven by the driving device 11 to realize the stirring action of the first stirring impeller 8.
The coal dust and the smaller coal blocks which pass through the net structure below the separation chamber 3 fall to the screen 13, the screen 13 screens the coal blocks and the coal dust under the action of the vibration device 14, the coal blocks which are aired enter the air box 19 through the discharge hole, and the coal dust falls into the bottom of the device and is quickly discharged from the second discharge pipe 18 under the action of the second stirring impeller 17.
When coal blocks falling into the air box 19 pass through the convex arc-shaped screen cover 23, the coal blocks can be blown by airflow blown out from the air inlet pipe 21, coal dust stained on the coal blocks sequentially passes through the air cover 24 and the air outlet pipe 22 along the airflow and enters the powder removing device, the powder removing device adopts a centrifugal dust remover, the coal dust is collected after the coal dust is removed, the coal blocks after the dust removal are discharged through the third discharge pipe 20, and then the coal blocks for thermal power generation are prepared.
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.
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 (10)
1. The utility model provides a coal crushing device of thermal power factory, is including being located crushing portion (1) on device upper portion, the top of crushing portion (1) is equipped with hopper (2), its characterized in that: the lower part of the crushing part (1) is sequentially provided with a first screening mechanism for providing large coal blocks and a second screening mechanism for separating powdery coal blocks, and a powder removing mechanism for removing coal powder on the surfaces of the coal blocks is arranged at a discharge port corresponding to the second screening mechanism.
2. The coal pulverizing device of the thermal power plant as claimed in claim 1, characterized in that: the first screening mechanism comprises a separation chamber (3) located on the inner side of the device, the top of the separation chamber (3) is communicated with the discharge end of the crushing part (1) through a first feeding pipe (4), a guide plate (5) of an arc structure is arranged on the upper portion of the inner side of the separation chamber (3), the edge of the guide plate (5) is fixedly connected with the inner wall of the separation chamber (3) through a plurality of fixing pieces (6), the bottom surface of the separation chamber (3) is of a net-shaped structure, a second feeding pipe (7) is arranged in the middle of the bottom surface of the separation chamber (3) in an inserting mode, a first stirring impeller (8) is arranged at the end portion, located inside the separation chamber (3), of the second feeding pipe (7), the bottom end portion of the second feeding pipe (7) extends to a discharge chamber (9) located below the separation chamber (3), and the end portion, located on the inner side of the discharge chamber (9), of the second feeding pipe (7) is in transmission connection with a, the transmission shaft (10) penetrates through the device and is in transmission connection with a driving device (11) below the device, a first discharge pipe (12) is arranged on one side of the lower portion of the discharge chamber (9), and the discharge end of the first discharge pipe (12) is located on the outer side of the device.
3. The coal pulverizing device of the thermal power plant as claimed in claim 1, characterized in that: the second screening mechanism comprises a screen (13), the screen (13) is connected with the inner wall of the device through a plurality of vibration devices (14), and the screen (13) is connected with the inner wall of the device through a first leakage-proof plate (15).
4. The coal pulverizing apparatus of a thermal power plant according to claim 2 or 3, characterized in that: the screen cloth (13) is passed in row material room (9), and is equipped with second leak protection board (16) between screen cloth (13) and row material room (9), the cross section of first leak protection board (15) and second leak protection board (16) is the wave structure.
5. The coal pulverizing device of the thermal power plant as claimed in claim 2, characterized in that: the transmission shaft (10) is provided with a second stirring impeller (17) in a sleeved mode at the position close to the lower portion of the inner side of the device, a second discharging pipe (18) is arranged on the bottom face of the device, and the second discharging pipe (18) is communicated with the device.
6. The coal pulverizing device of the thermal power plant as claimed in claim 1, characterized in that: the gumming mechanism is including bellows (19) that correspond the discharge gate, one side that device was kept away from in bellows (19) is equipped with third discharging pipe (20), the bottom surface of bellows (19) is connected with air-supply line (21), the top surface of bellows (19) is connected with out tuber pipe (22), the air-out end and the gumming device intercommunication of play tuber pipe (22).
7. The coal pulverizing device of the thermal power plant as claimed in claim 6, characterized in that: bellows (19) set up for the slope, and air-supply line (21) and play tuber pipe (22) all with bellows (19) go up the face that corresponds perpendicular, the inboard bottom surface of bellows (19) is equipped with gauze mask (23) of bellied circular arc structure with the junction of air-supply line (21), it is equipped with fan housing (24) with the junction of bellows (19) to go out tuber pipe (22), the inboard of fan housing (24) is equipped with block net (25).
8. The coal pulverizing device of the thermal power plant as claimed in claim 2, characterized in that: and sealing assemblies (26) are arranged at the matching positions of the separation chamber (3) and the second feeding pipe (7) and the matching positions of the second feeding pipe (7) and the discharge chamber (9).
9. The coal pulverizing device of the thermal power plant according to claim 2, characterized in that: the bottom surface of the separation chamber (3), the bottom surface of the discharge chamber (9) and the bottom surface of the inner side of the device are all of a middle convex structure.
10. The coal pulverizing device of the thermal power plant according to claim 3, characterized in that: the screen (13) is arranged in an inclined mode, and the lowest position of the screen (13) corresponds to the discharge hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911248314.2A CN110898975B (en) | 2019-12-09 | 2019-12-09 | Coal crushing device for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911248314.2A CN110898975B (en) | 2019-12-09 | 2019-12-09 | Coal crushing device for thermal power plant |
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| Publication Number | Publication Date |
|---|---|
| CN110898975A true CN110898975A (en) | 2020-03-24 |
| CN110898975B CN110898975B (en) | 2021-08-31 |
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|---|---|---|---|
| CN201911248314.2A Active CN110898975B (en) | 2019-12-09 | 2019-12-09 | Coal crushing device for thermal power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003200077A (en) * | 2002-01-10 | 2003-07-15 | Nikkiso Co Ltd | Fine powder production equipment |
| DE202005010025U1 (en) * | 2005-06-25 | 2005-10-13 | Franke, Hubert | Wood chopper has drive provided by diesel engine which in addition to chopper drives drum sieve and ejection fan, whereby waste heat from diesel engine is fed through ventilator and exhaust gas fed to drum sieve |
| WO2009044050A2 (en) * | 2007-09-05 | 2009-04-09 | Novad | Dry extraction of mineral oils |
| CN205797727U (en) * | 2016-06-23 | 2016-12-14 | 宿迁市通达机械有限公司 | A kind of grain screening dust arrester |
| CN107297237A (en) * | 2017-07-20 | 2017-10-27 | 袁志航 | A kind of multi-stage crushing screening installation for building |
| CN209189189U (en) * | 2018-11-23 | 2019-08-02 | 乐山惠田米业有限公司 | A kind of grain of rice screening machine with drying mechanism |
| CN209597271U (en) * | 2018-11-15 | 2019-11-08 | 肥西县丰润家庭农场 | A kind of rice field shrimp non-toxic inorganic fertilizer screening plant |
-
2019
- 2019-12-09 CN CN201911248314.2A patent/CN110898975B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003200077A (en) * | 2002-01-10 | 2003-07-15 | Nikkiso Co Ltd | Fine powder production equipment |
| DE202005010025U1 (en) * | 2005-06-25 | 2005-10-13 | Franke, Hubert | Wood chopper has drive provided by diesel engine which in addition to chopper drives drum sieve and ejection fan, whereby waste heat from diesel engine is fed through ventilator and exhaust gas fed to drum sieve |
| WO2009044050A2 (en) * | 2007-09-05 | 2009-04-09 | Novad | Dry extraction of mineral oils |
| CN205797727U (en) * | 2016-06-23 | 2016-12-14 | 宿迁市通达机械有限公司 | A kind of grain screening dust arrester |
| CN107297237A (en) * | 2017-07-20 | 2017-10-27 | 袁志航 | A kind of multi-stage crushing screening installation for building |
| CN209597271U (en) * | 2018-11-15 | 2019-11-08 | 肥西县丰润家庭农场 | A kind of rice field shrimp non-toxic inorganic fertilizer screening plant |
| CN209189189U (en) * | 2018-11-23 | 2019-08-02 | 乐山惠田米业有限公司 | A kind of grain of rice screening machine with drying mechanism |
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| CN110898975B (en) | 2021-08-31 |
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