CN216459374U

CN216459374U - Grinding device for high-activity ultrafine fly ash

Info

Publication number: CN216459374U
Application number: CN202122394610.2U
Authority: CN
Inventors: 尹小松; 苟海洋
Original assignee: Qujing Fangyuan Environmental Protection Building Materials Co ltd
Current assignee: Qujing Fangyuan Environmental Protection Building Materials Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-05-10
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses a grinding device for high-activity ultrafine fly ash, which comprises a grinding tank and a cylinder, wherein a first screen, a second screen, a vertical net and a grinding roller are arranged in the grinding tank, a feeding hole is formed in the top of the grinding tank, a coarse material discharging pipe is arranged on the side wall of the grinding tank, a lifter is vertically arranged on one side of the grinding tank, the cylinder is obliquely arranged, a filter screen is arranged at the bottom of the cylinder, a rotating shaft is coaxially arranged in the cylinder, a plurality of stirring blades are arranged on the rotating shaft at intervals, a material receiving cone, a shell and a material discharging cone are sequentially arranged at the bottom of the cylinder, a grinding mechanism is arranged in the shell and comprises a movable mill and a fixed mill which are arranged in a matching manner, an annular material passing gap is formed between the inner side surface of the fixed mill and the outer side surface of the movable mill, and the width of the material passing gap is gradually reduced from top to bottom. The utility model has the advantages of uniform fineness of the ground powder, high working efficiency, good grinding quality and obvious economic and social values.

Description

Grinding device for high-activity ultrafine fly ash

Technical Field

The utility model relates to the technical field of fly ash processing, in particular to a grinding device for high-activity ultrafine fly ash.

Background

The fly ash is fine ash collected from flue gas generated after coal combustion, is main solid waste residue discharged from coal-fired power plants, and along with the development of the power industry, the fly ash discharge amount of the coal-fired power plants is increased year by year, so that the fly ash becomes one of the industrial waste residues with larger discharge capacity in China. If the fly ash is not recycled, the environment is seriously polluted, but the fly ash is used as a concrete admixture, so that the method is a new way for composite recycling, has good social and environmental benefits, can consume a large amount of fly ash wastes, and creates considerable economic benefits. In order to better recycle the fly ash, the fly ash must be treated after collection, because the fly ash is mixed with blocky fly ash slag, the fly ash needs to be ground, the fly ash is ground into superfine particles, the mechanical structure of the existing grinding device is complex, the particle size of the ground fly ash is different, the use requirement cannot be met, meanwhile, certain dust can be caused in the treatment process, the harm to the environment and the health of workers is caused, in addition, the grinding efficiency of the fly ash is not high, and the processing requirement of people on the fly ash cannot be met. Therefore, it is objectively needed to develop a grinding device for high activity ultrafine fly ash with uniform fineness of grinding powder, high working efficiency and good grinding quality.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a grinding device for high-activity ultrafine fly ash, which has the advantages of uniform grinding powder fineness, high working efficiency and good grinding quality.

The utility model aims to realize the purpose, which comprises a crushing tank and a cylinder, wherein a first screen is obliquely arranged at the upper part in the crushing tank, the higher end of the first screen is fixed on the side wall of the crushing tank, the lower end of the first screen is arranged in a suspended manner, a second screen is obliquely arranged at the lower part in the crushing tank, the lower end of the second screen is fixed on the side wall of the crushing tank, a vertical net is arranged between the higher end and the first screen, a vibrator is arranged on the vertical net, crushing rollers are arranged in pairs in the crushing tank above the second screen, the two crushing rollers are positioned below the lower end of the first screen, a feeding port is arranged at the top of the crushing tank above the higher end of the first screen, a coarse material discharging pipe is arranged on the side wall of the crushing tank above the lower end of the second screen, a lifting machine is vertically arranged at one side of the crushing tank, the end part of the coarse material discharging pipe is communicated with the feeding port at the lower part of the lifting machine, a material conveying pipe is obliquely arranged at the discharging port at the upper part of the lifting machine, the lower end of the conveying pipe extends into the crushing tank and then is positioned above the two crushing rollers, the cylinder is obliquely arranged, the top of the higher end of the cylinder is communicated with the bottom of the crushing tank, two ends of the cylinder are respectively provided with a blocking plate, the bottom of the cylinder is provided with an opening along the length direction of the cylinder, a filter screen is arranged at the opening, a rotating shaft is coaxially arranged in the cylinder, one end of the rotating shaft penetrates through one of the blocking plates and then is connected with a driving mechanism in a transmission way, the other end of the rotating shaft is connected with the other blocking plate in a rotating way, a plurality of stirring blades are arranged on the rotating shaft at intervals along the length direction of the rotating shaft, a discharging pipe is arranged at the bottom of the blocking plate at the lower end of the cylinder, a material receiving cone, a shell and a blanking cone are sequentially arranged at the bottom of the cylinder, a grinding mechanism is arranged in the shell and comprises a movable mill and a fixed mill which are arranged in a matching way, the cross section of the movable mill is in the shape of a trapezoid with a smaller upper port and a larger port, and the bottom of the movable mill is connected with a motor in a transmission way, the motor passes through the horizontal pole to be fixed on the blanking awl, decides to grind for annular structure, decides to grind and is located the outside of moving the mill, decides the outside of grinding and fixes on the lateral wall of casing, decides to be formed with annular punishment in advance clearance between the medial surface of grinding and the lateral surface of moving the mill, and the width from the top down of punishment in advance clearance reduces gradually.

Furthermore, a lifting mechanism is arranged on the cross rod, and the motor is installed on the lifting mechanism.

Furthermore, a hot air inlet pipe is arranged on the side wall of the material receiving cone, and a hot air outlet pipe is arranged at the top of the crushing tank.

Furthermore, a dust remover is arranged on the hot air outlet pipe, a dust exhaust pipe is arranged at a dust exhaust port of the dust remover, and the lower end of the dust exhaust pipe is communicated with the top of the crushing tank.

Furthermore, a first guide cone with a large upper end opening and a small lower end opening is arranged on the fixed mill, a second guide cone with an upward cone top is arranged on the movable mill, and the position of an annular gap between the lower ends of the first guide cone and the second guide cone corresponds to the position of a material passing gap.

When the utility model is used, the collected fly ash is sent into a crushing tank from a feeding port, the fly ash firstly falls on a first screen, wherein the fly ash with the fineness meeting the requirement continuously falls off after passing through the first screen, the fly ash with larger volume and the fly ash block slide to a crushing roller along the first screen, the crushing roller crushes the fly ash with larger volume and the fly ash block, the crushed fly ash falls on a second screen, the second screen screens the fly ash, the fly ash with the fineness meeting the requirement continuously falls off after passing through the second screen, the fly ash which does not meet the requirement is sent into a lifter through a coarse material discharging pipe, the lifter conveys the coarse material upwards and returns to the crushing roller through a material conveying pipe to be continuously crushed until the fly ash with the fineness meeting the requirement falls off through the second screen, the fly ash falling from the first screen and the second screen falls into a cylinder, under the action of a stirring blade, the fly ash is stirred to homogenize the components of the fly ash, the fly ash moves towards the lower end of the cylinder, in the process, the fly ash with fine particles passes through the filter screen and falls into the grinding mechanism, oversize materials of the filter screen are discharged through the discharge pipe to complete classification, the fly ash with large particles is obtained, the fly ash can be used as required or can be recycled and processed again, the falling fly ash enters the material passing gap, meanwhile, the motor drives the dynamic mill to rotate, the fly ash is ground into powder with smaller particles under the action of the dynamic mill and the fixed mill, the ultrafine fly ash with uniform fineness is obtained, the grinding quality of the fly ash is good, the fly ash can be continuously ground in the whole process, and the working efficiency is high. The utility model has the advantages of uniform fineness of the ground powder, high working efficiency, good grinding quality and obvious economic and social values.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

in the figure: 1-crushing tank, 2-cylinder, 3-first screen, 4-second screen, 5-vertical screen, 6-vibrator, 7-crushing roller, 8-feeding port, 9-coarse material discharging pipe, 10-lifter, 11-conveying pipe, 12-filter screen, 13-rotating shaft, 14-driving mechanism, 15-discharging pipe, 16-receiving cone, 17-shell, 18-blanking cone, 19-dynamic mill, 20-static mill, 21-motor, 22-cross rod, 23-material passing gap, 24-lifting mechanism, 25-hot gas inlet pipe, 26-hot gas outlet pipe, 27-dust remover, 28-dust exhaust pipe, 29-first guide cone, 30-second guide cone and 31-stirring blade.

Detailed Description

The present invention is further described with reference to the drawings, but the present invention is not limited thereto in any way, and any modification or improvement based on the present invention is within the protection scope of the present invention.

As shown in figure 1, the utility model comprises a crushing tank 1 and a cylinder 2, wherein a first screen mesh 3 is obliquely arranged at the upper part in the crushing tank 1, the higher end of the first screen mesh 3 is fixed on the side wall of the crushing tank 1, the lower end of the first screen mesh is arranged in a suspended manner, a second screen mesh 4 is obliquely arranged at the lower part in the crushing tank 1, the lower end of the second screen mesh 4 is fixed on the side wall of the crushing tank 1, a vertical mesh 5 is arranged between the higher end and the first screen mesh 3, a vibrator 6 is arranged on the vertical mesh 5, the vibrator 6 is the existing equipment and can vibrate when being started, so that the first screen mesh 3, the second screen mesh 4 and the vertical mesh 5 are driven to vibrate together, the screening efficiency of fly ash is improved, the mesh blockage of the first screen mesh 3, the second screen mesh 4 and the vertical mesh 5 is prevented, a crushing roller 7 is oppositely arranged in the crushing tank 1 above the second screen mesh 4, the crushing roller 7 is the prior art and has the function of extruding and crushing of the fly ash, the method comprises the steps of crushing coal ash and pulverized coal blocks with larger particles into particles with smaller particle sizes, arranging two crushing rollers 7 below the lower end of a first screen 3, arranging a feeding port 8 at the top of a crushing tank 1 above the higher end of the first screen 3, arranging a coarse material discharging pipe 9 on the side wall of the crushing tank 1 above the lower end of a second screen 4, vertically arranging a lifting machine 10 on one side of the crushing tank 1, wherein the lifting machine 10 is an existing device and is used for lifting the coal ash with larger particles upwards so as to return the coal ash to the crushing rollers 7 for crushing again, the operation of workers is not needed, the operation is more convenient and rapid, the crushing efficiency of the coal ash is improved, the end part of the coarse material discharging pipe 9 is communicated with the feeding port at the lower part of the lifting machine 10, arranging a material conveying pipe 11 at the upper part of the lifting machine 10 in an inclined manner, and the lower end of the material conveying pipe 11 is arranged above the two crushing rollers 7 after extending into the crushing tank 1, the cylinder 2 is obliquely arranged, the top of the higher end of the cylinder 2 is communicated with the bottom of the crushing tank 1, two ends of the cylinder 2 are respectively provided with a blocking plate, the bottom of the cylinder 2 is provided with an opening along the length direction of the cylinder, the opening is provided with a filter screen 12, a rotating shaft 13 is coaxially arranged in the cylinder 2, one end of the rotating shaft 13 penetrates through one of the blocking plates and is connected with a driving mechanism 14 in a transmission way, the driving mechanism 14 is of the existing structure and is used for driving the rotating shaft 13 to rotate, the other end of the driving mechanism is rotatably connected with the other blocking plate, a plurality of stirring blades 31 are arranged on the rotating shaft 13 at intervals along the length direction of the rotating shaft, the bottom of the blocking plate at the lower end of the cylinder 2 is provided with a discharge pipe 15, the bottom of the cylinder 2 is sequentially provided with a material receiving cone 16, a shell 17 and a blanking cone 18, a grinding mechanism is arranged in the shell 17 and comprises a movable grinder 19 and a fixed grinder 20 which are arranged in a matching way, and the cross section of the movable grinder 19 is in a trapezoid shape with a small upper end and a large lower end, the bottom of the movable mill 19 is connected with a motor 21 in a transmission manner, the motor 21 is an existing device and is used for driving the movable mill 19 to rotate so as to complete the milling of the fly ash, the motor 21 is fixed on the blanking cone 18 through a cross rod 22, the fixed mill 20 is of an annular structure, the fixed mill 20 is located on the outer side of the movable mill 19, the outer side of the fixed mill 20 is fixed on the side wall of the shell 17, an annular material passing gap 23 is formed between the inner side surface of the fixed mill 20 and the outer side surface of the movable mill 19, and the width of the material passing gap 23 is gradually reduced from top to bottom.

When the utility model is used, the collected fly ash is fed into a crushing tank 1 from a feeding port 8, the fly ash firstly falls on a first screen mesh 3, wherein the fly ash with the fineness meeting the requirement continuously falls down after passing through the first screen mesh 3, the fly ash and pulverized coal blocks with larger volume slide down to a crushing roller 7 along the first screen mesh 3, the crushing roller 7 crushes the fly ash and pulverized coal blocks with larger volume and fall onto a second screen mesh 4 after crushing, the second screen mesh 4 screens the fly ash, the fly ash with the fineness meeting the requirement continuously falls down after passing through the second screen mesh 4, the fly ash which does not meet the requirement is fed into a lifter 10 through a coarse material discharging pipe 9, the lifter 10 conveys the coarse material upwards and returns to the crushing roller 7 through a material conveying pipe 11 for continuous crushing until the fly ash with the fineness meeting the requirement falls down through the second screen mesh 4, the fly ash falling from the first screen mesh 3 and the second screen mesh 4 falls into a cylinder 2, under the action of the stirring blade 31, the components of the fly ash are stirred and homogenized, the components of the fly ash move towards the lower end of the cylinder 2, in the process, the fly ash with fine particles pass through the filter screen 12 and fall into the grinding mechanism, oversize materials on the filter screen 12 are discharged through the discharge pipe 15, classification is completed, the fly ash with relatively large particles is obtained, the part of the fly ash can be used as required or recycled and processed again, the falling fly ash enters the material passing gap 23, the motor 21 drives the movable mill 19 to rotate, the fly ash is ground into powder with smaller particles under the action of the movable mill 19 and the fixed mill 20, the ultrafine fly ash with uniform fineness is obtained, the grinding quality of the fly ash is good, the fly ash can be continuously ground in the whole process, and the working efficiency is high.

The lifting mechanism 24 is arranged on the cross rod 22, the motor 21 is installed on the lifting mechanism 24, the lifting mechanism 24 is in the prior art, and the lifting mechanism 24 can drive the motor 21 and the movable mill 19 to move up and down, so that the width of the material passing gap 23 between the movable mill 19 and the fixed mill 20 is adjusted, the fineness of the ground fly ash is adjusted, and different fly ash fineness requirements are met.

The side wall of the receiving cone 18 is provided with a hot air inlet pipe 25, the top of the crushing tank 1 is provided with a hot air outlet pipe 26, when the crusher operates, hot air is introduced from the hot air inlet pipe 25, the hot air contacts with the fly ash in the utility model, and moisture in the fly ash absorbs heat in the hot air to evaporate, so that the fly ash is dried, and the efficiency and the quality of fly ash grinding are improved.

The hot gas outlet pipe 26 is provided with a dust remover 27, a dust discharging port of the dust remover 27 is provided with a dust discharging pipe 28, the lower end of the dust discharging pipe 28 is communicated with the top of the crushing tank 1, the dust remover 27 is an existing device and is used for removing solid particles mixed in gas, so that fly ash particles in the gas are separated out and are returned to the crushing tank 1, on one hand, the pollution of dust to the environment can be avoided, and on the other hand, the waste of the fly ash can be avoided.

The fixed mill 20 is provided with a first guide cone 29 with a large upper end and a small lower end, the movable mill 19 is provided with a second guide cone 30 with an upward cone top, an annular gap between the lower ends of the first guide cone 29 and the second guide cone 30 corresponds to the position of the material passing gap 23, when in actual operation, the upper end of the first guide cone 29 is fixed on the side wall of the material receiving cone 16, and the lower end is fixed on the edge of the inner ring of the fixed mill 20, and similarly, the lower end of the second guide cone 30 is fixed on the edge of the movable mill 20, when the fly ash falls down, the fly ash is guided to the material passing gap 23 under the action of the first large guide cone 29 and the second guide cone 30, so that the fly ash is prevented from being accumulated on the fixed mill 20 and the movable mill 19.

Claims

1. A grinding device for high-activity ultrafine fly ash is characterized by comprising a grinding tank (1) and a cylinder (2), wherein a first screen (3) is obliquely arranged at the upper part in the grinding tank (1), the higher end of the first screen (3) is fixed on the side wall of the grinding tank (1), the lower end of the first screen is arranged in a suspended manner, a second screen (4) is obliquely arranged at the lower part in the grinding tank (1), the lower end of the second screen (4) is fixed on the side wall of the grinding tank (1), a vertical net (5) is arranged between the higher end and the first screen (3), a vibrator (6) is arranged on the vertical net (5), grinding rollers (7) are oppositely arranged in the grinding tank (1) above the second screen (4), the two grinding rollers (7) are positioned below the lower end of the first screen (3), a feeding opening (8) is arranged at the top of the grinding tank (1) above the higher end of the first screen (3), the device is characterized in that a coarse material discharging pipe (9) is arranged on the side wall of the crushing tank (1) above the lower end of the second screen (4), an elevator (10) is vertically arranged on one side of the crushing tank (1), the end part of the coarse material discharging pipe (9) is communicated with a feeding port at the lower part of the elevator (10), a material conveying pipe (11) is obliquely arranged at a discharging port at the upper part of the elevator (10), the lower end of the material conveying pipe (11) extends into the crushing tank (1) and then is positioned above two crushing rollers (7), the cylinder (2) is obliquely arranged, the top of the higher end of the cylinder (2) is communicated with the bottom of the crushing tank (1), blocking plates are arranged at the two ends of the cylinder (2), an opening is processed along the length direction of the cylinder at the bottom of the cylinder (2), a filter screen (12) is arranged at the opening part, a rotating shaft (13) is coaxially arranged in the cylinder (2), and one end of the rotating shaft (13) penetrates through one of the blocking plate and then is connected with a driving mechanism (14), the other end rotates with another closure plate to be connected, be provided with a plurality of stirring vane (31) along the length direction interval of pivot on pivot (13), the closure plate bottom of drum (2) lower end is provided with row material pipe (15), the bottom of drum (2) has set gradually material receiving awl (16), casing (17) and blanking awl (18), the inside of casing (17) is provided with the mechanism of milling, and the mechanism of milling is including the movable mill (19) and the fixed mill (20) that the cooperation set up, the cross sectional shape of moving mill (19) is the big trapezium of port down for the last port, and the bottom transmission of moving mill (19) is connected with motor (21), motor (21) are fixed on blanking awl (18) through horizontal pole (22), fixed mill (20) are annular structure, and fixed mill (20) are located the outside of moving mill (19), and the outside of fixed mill (20) is fixed on the lateral wall of casing (17), an annular material passing gap (23) is formed between the inner side surface of the fixed mill (20) and the outer side surface of the movable mill (19), and the width of the material passing gap (23) is gradually reduced from top to bottom.

2. The grinding device for the high-activity ultrafine fly ash according to claim 1, wherein the cross bar (22) is provided with a lifting mechanism (24), and the motor (21) is mounted on the lifting mechanism (24).

3. The grinding device for the high-activity ultrafine fly ash according to claim 1, wherein a hot air inlet pipe (25) is arranged on the side wall of the receiving cone (16), and a hot air outlet pipe (26) is arranged at the top of the crushing tank (1).

4. The grinding device for the high-activity ultrafine fly ash according to claim 3, wherein a dust remover (27) is arranged on the hot gas outlet pipe (26), a dust discharge pipe (28) is arranged at a dust discharge port of the dust remover (27), and the lower end of the dust discharge pipe (28) is communicated with the top of the grinding tank (1).

5. The grinding device for the high-activity ultrafine fly ash according to claim 1, wherein a first guide cone (29) with a large upper port and a small lower port is arranged on the fixed mill (20), a second guide cone (30) with an upward cone top is arranged on the movable mill (19), and an annular gap between the lower ends of the first guide cone (29) and the second guide cone (30) corresponds to the position of the material passing gap (23).