CN212882727U

CN212882727U - Coal pulverizer with ceramic composite structure

Info

Publication number: CN212882727U
Application number: CN202021506850.6U
Authority: CN
Inventors: 王海; 张博; 康杰
Original assignee: Zhuolu Jinyu Cement Co ltd
Current assignee: Zhuolu Jinyu Cement Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-04-06
Anticipated expiration: 2030-07-27

Abstract

The application relates to a coal mill with a ceramic composite structure, which comprises a rack, a lower machine body fixedly arranged on the rack and an upper machine body fixedly connected with the lower machine body; the power device is fixedly arranged on the frame, the lower machine body and the upper machine body are both of a cavity structure, and the powder selecting device is arranged in the upper machine body; the grinding roller device comprises a grinding roller body, a grinding roller sleeve sleeved on the grinding roller body and a grinding roller hanging frame supporting the grinding roller body, one end of the grinding roller hanging frame is fixedly arranged at the other end of the inner side wall of the lower machine body and is rotationally connected with the grinding roller body, the grinding roller sleeve and the grinding disc are made of ceramic composite materials, and a feeding pipeline and an air supply device which are fixedly connected with the inner wall of the lower machine body are further arranged above the grinding roller device. This application has wear-resisting and go out efficient technological effect of powder.

Description

Coal pulverizer with ceramic composite structure

Technical Field

The application relates to the field of powder making equipment, in particular to a coal mill with a ceramic composite structure.

Background

At present, coal is an important raw material for large-scale coal-consuming enterprises such as power plants, steel plants, cement plants and the like, and the coal needs to be ground into powder before use so as to improve the combustion efficiency. The coal mill is a machine for crushing and grinding coal briquettes into coal powder, and is commonly a flat disc mill, a bowl mill, an E-type mill and a roller mill; they have in common the feature that the grinding part consists of two sets of grinding bodies moving relative to each other, between which the coal is crushed by pressing and grinding, but the grinding part is easily worn, which in turn leads to a reduction in the extraction efficiency of the coal mill.

The current chinese patent with publication number CN206746704U discloses a roller type medium speed coal mill, its base, the body frame that is located on the base, the air chamber has in the body frame, rotates the grinding bowl that is connected and is located the air chamber with the base to and with the grinding roll of grinding bowl rolling contact, be equipped with into coal mouth directly over the grinding bowl, the grinding roll articulates on the lateral wall of body frame through the supporting seat, be equipped with the deironing device on the grinding roll, the deironing device includes, sets up the electro-magnet that is close to into coal mouth one side on the grinding roll, sets up the pressure sensor between grinding roll and electro-magnet to and the jettison device that one end and electro-magnet are connected, jettison device can drive the electro-magnet fast movement in order to launch away the adsorbed iron plate on the electro-magnet. However, in the using process, the grinding roller and the grinding disc are continuously worn, so that the using period is short, the grinding device needs to be replaced irregularly, and the cost of manpower and material resources is increased; the grinding device is worn to reduce the grinding efficiency of the coal blocks, and then the powder discharging efficiency is influenced.

In view of the above-mentioned related art, the inventor believes that there is a defect that the grinding part is easily worn, which may cause the powder discharging efficiency of the coal mill to be reduced.

Disclosure of Invention

In order to improve the play powder efficiency of milling machine, this application provides a coal pulverizer with ceramic composite construction, it has wear-resisting and goes out the efficient technological effect of powder.

The application provides a coal pulverizer with ceramic composite construction adopts following technical scheme:

a coal mill with a ceramic composite structure comprises a frame for supporting, a lower machine body fixedly arranged on the frame and an upper machine body fixedly connected with the lower machine body; the machine frame is fixedly provided with a power device, the lower machine body and the upper machine body are both of a cavity structure, a grinding mechanism is arranged in the lower machine body, and a powder selecting device is arranged in the upper machine body; the grinding roller device comprises a grinding roller body, a grinding roller sleeve sleeved on the grinding roller body and a grinding roller hanger supporting the grinding roller body, one end of the grinding roller hanger is fixedly arranged at the other end of the inner side wall of the lower machine body and is rotatably connected with the grinding roller body, the grinding roller sleeve and the grinding disc are made of ceramic composite materials, and a feeding pipeline and an air supply device which are fixedly connected with the inner wall of the lower machine body are further arranged above the grinding roller device.

Through adopting above-mentioned technical scheme, it is reinforced to the coal pulverizer through charge-in pipeline, then through relative motion's grinding between grinding roller device and the mill assembly, make partial coal cinder smashed, then air supply arrangement will be blown into to the internal of supreme machine by kibbling buggy, select the buggy that reaches the requirement via the selection powder device and see off, grinding roller cover and mill all adopt ceramic composite to make, the wear resistance of device has been promoted, the wearing and tearing of grinding roller device have been reduced, the service life thereof has been increased, the frequency of changing has been reduced, be convenient for use for a long time, the play powder efficiency of coal pulverizer has also been promoted simultaneously.

Preferably, the power device comprises a main motor, a coupler and a speed reducer, wherein one end of the coupler is connected to an output shaft of the main motor, and an output shaft of the coupler is fixedly connected with an input shaft of the speed reducer (42).

Through adopting above-mentioned technical scheme, mill assembly if the rotational speed can lead to the grinding of coal cinder insufficient too fast, reduce and go out whitewashed efficiency reduction gear and can reduce main motor drive's speed then drive mill assembly and rotate for mill assembly and grinding roller device are more abundant to the grinding of coal cinder, have promoted out whitewashed efficiency.

Preferably, the carousel assembly includes the base and with the coaxial fixed mill of base, the one side that the mill is close to the grinding roller device is the lapping surface, is provided with the line of increase frictional force on the lapping surface, has the clearance between the inside wall of mill edge and lower organism, the bottom surface and the base fixed connection of organism are passed down to the output shaft one end of reduction gear, a plurality of talc groove has been seted up to the lateral wall of mill.

Through adopting above-mentioned technical scheme, the base has played fine supporting role to the mill, keep mill pivoted stable, stone or metal block that simultaneously can not the grinding can drop to the interior bottom surface of organism down through the talc groove of mill lateral wall and the clearance between mill and the lower organism inner wall, the accumulational probability of mill upper surface rubble has been reduced, be provided with the line of increase frictional force on the grinding surface simultaneously, can reduce the wearing and tearing of grinding surface, increase the frictional force between grinding surface and the grinding roller device simultaneously, the fineness of grinding has been promoted, the play powder efficiency of device has been increased.

Preferably, the diameter of mill is greater than the base diameter, is equipped with the scraper blade between the interior bottom surface of mill and lower organism, and scraper blade and mill synchronous revolution have been seted up to the bottom surface of lower organism, and the slag notch intercommunication has the pipeline of slagging tap.

Through adopting above-mentioned technical scheme, the scraper blade rotates with the mill is synchronous, can sweep into and out and ask the mouth when not ground stone and metal block by the scraper blade, then discharge through the passageway of slagging tap, and convenient the collection has also reduced the accumulational probability of interior bottom surface of organism down simultaneously, has strengthened the convenience and the practicality of device.

Preferably, the air supply device comprises an air inlet arranged on the side wall of the lower machine body, a circulating pipeline fixedly arranged on the inner wall of the lower machine body and a plurality of nozzles arranged on the circulating pipeline, the circulating pipeline is circumferentially arranged and communicated with the air inlet, and the nozzles are also communicated with the circulating pipeline.

Through adopting above-mentioned technical scheme, the air intake switch-on comes from the hot-blast that external equipment sent into, then gets into circulating line, erupts through the nozzle again, hot-blast can be with kibbling buggy and the separation of the not kibbling stone, can play dry effect to the buggy simultaneously, less the buggy because of crossing the inside probability of tide adhesion organism under, the nozzle that circumference set up makes hot-blast more even simultaneously, further plays the effect of separation and dry buggy, the practicality of device has been promoted.

Preferably, a damping spring is connected between the grinding roller hanger and the inner side wall of the lower machine body.

Through adopting above-mentioned technical scheme, damping spring can reduce grinding roller device's skew and vibration, and this makes when grinding, and the relative motion between grinding roller device and the mill lapping surface is more firm, has promoted the efficiency of grinding for the device has more the practicality.

Preferably, the upper body and the lower body are connected through a flange and provided with a sealing gasket made of rubber.

Through adopting above-mentioned technical scheme, adopt flange joint between the organism and the lower organism, dismantlement that can be convenient is overhauld, has increased the convenience of device, and the sealed pad can play the effect that prevents the buggy and leak simultaneously, has strengthened the practicality of device.

Preferably, the powder selecting device comprises a material guiding bin, a rotating motor arranged at the top end of the upper machine body and an impeller fan fixedly connected with an output shaft end of the rotating motor, the impeller fan is positioned in the upper end of the material guiding bin, an outlet of the material guiding bin is positioned above the grinding roller device, the material guiding bin is fixedly connected with the inner side wall of the upper machine body through a connecting rod, the upper machine body further comprises a rising cavity, and the rising cavity is a space between the material guiding bin and the inner side wall of the upper machine body.

Through adopting above-mentioned technical scheme, the buggy is blown up the back by hot-blast, and the interior top surface of organism is arrived in the cabin that rises, then falls, and through the sieve powder that also divides the fan, the less buggy of granule is upwards blown to the meal outlet, and the great granule of granule is through falling to leading in the feed bin, then carries out the secondary grinding again on the export that leads the feed bin reaches the abrasive surface, and the secondary grinding has promoted the fineness of buggy, has increased the practicality of device.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the coal mill is fed through the feeding pipeline, then a part of coal blocks are crushed through the grinding of relative motion between the grinding roller device and the grinding disc assembly, then the crushed coal powder is blown into the machine body by the air supply device, the coal powder meeting the requirements is screened out through the powder selecting device and is sent out, the grinding roller sleeve and the grinding disc are both made of ceramic composite materials, the wear resistance of the device is improved, the service life of the device is prolonged, meanwhile, the damping spring can reduce the deviation and vibration of the grinding roller device, and the powder discharging efficiency of the abrasion lifting device is reduced;

2. the air inlet is communicated with hot air sent by external equipment, then the hot air enters the circulating pipeline and is sprayed out through the nozzle, the pulverized coal and un-pulverized stones can be separated by the hot air, the pulverized coal can be dried, the probability that the pulverized coal is adhered to the lower machine body due to over-tide is reduced, meanwhile, the nozzles arranged in the circumferential direction enable the hot air to be more uniform, the pulverized coal separating and drying effects are further achieved, and the practicability of the device is improved;

3. the scraper blade rotates with the mill is synchronous, can sweep into and out and ask the mouth when not ground stone and metal block by the scraper blade, then discharges through the passageway of slagging tap, and convenient the collection has also reduced the accumulational probability of interior bottom surface of organism down simultaneously, has strengthened the convenience and the practicality of device.

Drawings

FIG. 1 is a view showing the overall structure of the apparatus in the embodiment;

fig. 2 is a schematic view showing the internal structure of the lower body in the embodiment.

Description of reference numerals: 1. a frame; 2. a lower machine body; 21. a feed conduit; 22. an air supply device; 221. a circulation pipe; 222. a nozzle; 223. an air inlet; 23. a slag outlet; 24. a gasket; 3. mounting the machine body; 31. a feeding bin; 32. an ascending cavity; 33. a support bar; 4. a power plant; 41. a main motor; 42. a speed reducer; 5. a millstone assembly; 51. a grinding disc; 52. a base; 53. a squeegee; 54. a talc trough; 6. a grinding roller device; 61. a grinding roller body; 62. grinding a roller sleeve; 63. a grinding roller hanger; 64. a damping spring; 7. a powder selecting device; 71. rotating the motor; 72. an impeller fan; 73. and a powder outlet.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a coal mill with a ceramic composite structure, and with reference to fig. 1 and 2, the coal mill comprises a frame 1 for supporting, a lower machine body 2 fixedly arranged on the frame 1, and an upper machine body 3 fixedly connected with the lower machine body 2; a grinding disc assembly 5 and a grinding roller device 6 are arranged in the lower machine body 2, a gap exists between the grinding disc assembly 5 and the grinding roller device 6, and the grinding roller device 6 is fixedly arranged on the inner side wall of the lower machine body 2 and is positioned above the grinding disc assembly 5; the grinding disc assembly 5 comprises a base 52 arranged on the inner bottom surface of the lower machine body 2 and a grinding disc 51 fixedly arranged on the base 52, the diameter of the grinding disc 51 is larger than that of the base 52, a plurality of talc grooves 54 are formed in the circumferential direction of the side wall of the grinding disc 51, one end of the grinding disc 51 close to the grinding roller device 6 is a grinding surface, grains for increasing friction force are arranged on the grinding surface, a scraping plate 53 is fixedly arranged between the base 52 and the grinding disc 51, the scraping plate 53 can synchronously rotate along with the grinding disc 51, and a slag outlet 23 is formed in the inner bottom surface of the lower machine body 2; the grinding roller device 6 comprises a grinding roller hanger 63 fixedly arranged on the inner side wall of the lower machine body 2 and a grinding roller body 61 rotatably connected with the grinding roller hanger 63, a grinding roller sleeve 62 is further sleeved outside the grinding roller body 61, the grinding roller sleeve 62 and the grinding disc 51 are both made of ceramic composite materials, and a damping spring 64 is connected between the grinding roller hanger 63 and the inner wall of the lower machine body 2.

Referring to fig. 1, a power device 4 is arranged in a frame 1, the power device 4 comprises a main motor 41, a speed reducer 42 and a coupling, one end of the coupling is connected with an output shaft of the main motor 41, the other end of the coupling is connected to the speed reducer 42, an output shaft of the speed reducer 42 penetrates through the bottom surface of a lower machine body 2 and is fixedly connected with a base 52, and the speed reducer 42 drives a grinding disc assembly 5 to rotate together during grinding.

Referring to fig. 1, an air supply device 22 and a feed pipe 21 are further disposed in the lower machine body 2, the air supply device 22 is fixedly disposed on an inner wall of the lower machine body 2 and is located between the grinding roller device 6 and the grinding disc assembly 5, and a gap between the grinding surface of the air supply device 22 and the grinding disc 51 is larger than a gap between the grinding disc assembly 5 and the grinding roller device 6, the air supply device 22 includes an air inlet 223 disposed on a side wall of the lower machine body 2 and a circulation pipe 221 fixedly disposed on an inner side wall of the lower machine body 2 and communicated with the air inlet 223, the circulation pipe 221 is circumferentially disposed, and a plurality of nozzles 222 communicated with the circulation pipe 221 are disposed on the circulation pipe 221, one end of the feed pipe 21 is funnel-shaped, and one.

Referring to fig. 1, the upper body 3 and the lower body 2 are flange-connected and provided with a rubber gasket 24, a powder selecting device 7 is arranged in the upper body 3, the powder selecting device 7 includes a rotating motor 71 and two powder outlets 73 arranged on the top end of the upper body 3, the two powder outlets 73 are arranged, an output shaft of the rotating motor 71 penetrates through a top plate of the upper body 3 and is connected with an impeller fan 72, a material guiding bin 31 is arranged below the impeller fan 72, a supporting rod 33 is fixedly connected between the material guiding bin 31 and the inner wall of the upper body 3, and a space between the material guiding bin 31 and the inner wall of the upper body 3 is a rising cavity 32.

The implementation principle of the coal mill with the ceramic composite structure in the embodiment of the application is as follows: when in use, the coal blocks to be processed are added into one end of the lower machine body 2 arranged outside the lower machine body through the feeding pipeline 21, the coal blocks to be processed fall on the grinding surface of the grinding disc 51, the main motor 41 is started, the speed reducer 42 reduces the rotating speed transmitted by the main motor 41 and then drives the grinding disc assembly 5 to rotate, under the action of centrifugal force, the coal to be processed moves towards the edge of the grinding surface, then the grinding roller body 61 and the grinding roller sleeve 62 are driven by the grinding disc 51 and the coal to be processed to rotate, the coal to be processed is continuously ground while the grinding roller body 61 and the grinding roller sleeve 62 move relative to the grinding surface, so that the coal blocks become particles and stone blocks or metal blocks which cannot be crushed, the stone blocks and the metal blocks fall to the inner bottom surface of the lower machine body 2 through the gap between the grinding disc 51 and the inner wall of the lower machine body 2 and the talc groove 54 on the side wall of the grinding disc 51, then is swept to the slag outlet 23 by a scraper 53 which rotates synchronously with the grinding disc 51, and then enters a slag outlet pipeline through the slag outlet 23 to be discharged; in the grinding process, the damping spring 64 is continuously compressed and reset, so that the vibration of the grinding roller device 6 in the grinding process is reduced, and the grinding roller device 6 is more stable in the grinding process; the air inlet 223 is connected with hot air from external equipment, the hot air is sprayed out from the nozzle 222 through the circulating pipeline 221, the hot air blows up crushed particles upwards to enter the ascending cavity 32, the particles are dried by the hot air in the ascending process and then reach the inner top surface of the upper machine body 3, then the particles fall down to enter the powder selecting device 7, the rotating motor 71 drives the impeller fan 72 to rotate, the impeller fan 72 generates upward blowing force, coal powder reaching the preset particle size is blown upwards to the powder outlet 73 and then discharged, larger particles fall downwards to the material guiding bin 31 and then fall to the grinding surface from the upside of the grinding roller device 6 through the outlet of the material guiding bin 31 for secondary grinding, and the circulation enables the coal powder discharged from the powder outlet 73 at each time to reach the preset particle size.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A coal mill with a ceramic composite structure comprises a frame (1) for supporting, a lower machine body (2) fixedly arranged on the frame (1) and an upper machine body (3) fixedly connected with the lower machine body (2); the method is characterized in that: the powder sorting machine is characterized in that a power device (4) is fixedly arranged on the rack (1), the lower machine body (2) and the upper machine body (3) are both of a cavity structure, and a powder sorting device (7) is arranged in the upper machine body (3); be equipped with mill assembly (5) in organism (2) down and with organism (2) lateral wall fixed grinding roller device (6) down, grinding roller device (6) are located the top of mill assembly (5) and have the clearance between the two, grinding roller device (6) include grinding roller body (61), cover grinding roller cover (62) and grinding roller gallows (63) of supporting grinding roller body (61) on grinding roller body (61), grinding roller gallows (63) one end sets firmly in the inside wall of organism (2) down, and the other end and grinding roller body (61) rotate to be connected, and grinding roller cover (62) and mill (51) all adopt ceramic composite to make, and the top of grinding roller device (6) still is equipped with and organism (2) inner wall fixed connection's charge-in pipeline (21) and air supply arrangement (22) down.

2. The coal pulverizer having a ceramic composite structure of claim 1, wherein: the power device (4) comprises a main motor (41), a coupler and a speed reducer (42), one end of the coupler is connected to an output shaft of the main motor (41), and an output shaft of the coupler is fixedly connected with an input shaft of the speed reducer (42).

3. The coal pulverizer having a ceramic composite structure of claim 1, wherein: the grinding disc assembly (5) comprises a base (52) and a grinding disc (51) coaxially fixed with the base (52), a gap exists between the edge of the grinding disc (51) and the inner side wall of the lower machine body (2), lines for increasing friction force are arranged on a grinding surface, one end of an output shaft of the speed reducer (42) penetrates through the bottom surface of the lower machine body (2) and the base (52) and is fixedly connected with the bottom surface, and a plurality of sliding stone grooves (54) are formed in the side wall of the grinding disc (51).

4. The coal pulverizer of claim 3, wherein: the diameter of mill dish (51) is greater than base (52) diameter, is equipped with scraper blade (53) between mill dish (51) and the interior bottom surface of lower organism (2), and scraper blade (53) and mill dish (51) synchronous revolution have seted up slag notch (23) down the bottom surface of organism (2), and slag notch (23) intercommunication has the pipeline of slagging tap.

5. The coal pulverizer having a ceramic composite structure of claim 1, wherein: the air supply device (22) comprises an air inlet (223) formed in the side wall of the lower machine body (2), a circulating pipeline (221) fixedly arranged on the inner wall of the lower machine body (2) and a plurality of nozzles (222) arranged on the circulating pipeline (221), the circulating pipeline (221) is circumferentially arranged and communicated with the air inlet (223), and the nozzles (222) are also communicated with the circulating pipeline (221).

6. The coal pulverizer having a ceramic composite structure of claim 1, wherein: and a damping spring (64) is connected between the grinding roller hanger (63) and the inner side wall of the lower machine body (2).

7. The coal pulverizer having a ceramic composite structure of claim 1, wherein: the upper machine body (3) and the lower machine body (2) are connected through flanges and provided with a sealing gasket (24) made of rubber.

8. The coal pulverizer having a ceramic composite structure of claim 1, wherein: powder selecting device (7) including drawing feed bin (31), locate rotation motor (71) on last organism (3) top and with rotation motor (71) output shaft fixed connection's impeller fan (72), impeller fan (72) are located and draw feed bin (31) upper end, the export that draws feed bin (31) is located the top of grinding roller device (6), fixedly connected with bracing piece (33) between the inside wall of drawing feed bin (31) and last organism (3), go up still including rising chamber (32) in organism (3), chamber (32) that rises is for drawing the space between feed bin (31) and last organism (3) inside wall.