CN215312802U - Energy-saving production-improving cement raw material grinding device - Google Patents
Energy-saving production-improving cement raw material grinding device Download PDFInfo
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- CN215312802U CN215312802U CN202121102219.4U CN202121102219U CN215312802U CN 215312802 U CN215312802 U CN 215312802U CN 202121102219 U CN202121102219 U CN 202121102219U CN 215312802 U CN215312802 U CN 215312802U
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Abstract
The utility model discloses an energy-saving production-increasing cement raw material grinding device which comprises raw material vertical grinding equipment, a connecting air channel, an air distribution chamber, a cyclone dust collector and a circulating fan, wherein an air distribution cone is fixedly arranged on the inner side of the air distribution chamber, an air inlet pipe is fixedly arranged at the input end of the cyclone dust collector, the bottom end of the air distribution chamber is hermetically connected with one end of the air inlet pipe, the air distribution cone is a regular pyramid, the air distribution cone is positioned above the air inlet pipe, an inner material blocking ring is arranged on the inner side of the outer material blocking ring, and a baffle plate is detachably arranged on the inner side of the inner material blocking ring. According to the utility model, by adopting the high-efficiency low-resistance powder concentrator, the ceramic roller sleeve grinding roller, the inner material blocking ring with a detachable structure, the air dividing cone with a regular pyramid shape and the air inlet pipe, the yield of the device is improved by 20-30t/h, the power consumption of the system is reduced by 1.0-1.5kwh/t, and the running resistance of the cyclone dust collector is reduced from 1600-1000 Pa to 900-1000Pa, so that the device has lower modification cost, the powder concentration efficiency is improved, the power consumption of the system and the system resistance are reduced, and the effects of saving energy and improving the yield are realized.
Description
Technical Field
The utility model belongs to the field of cement raw material grinding, and particularly relates to an energy-saving production-improving cement raw material grinding device.
Background
Raw material grinding is an important link of cement production, finished products produced by raw material grinding are raw material powder for calcining clinker, in the actual cement production process, the yield and the power consumption of raw material grinding equipment are direct influence factors of the comprehensive cost of clinker and cement, a traditional Chinese LGM5024 grinding machine is a common vertical roller mill, is widely applied to the field of grinding of cement raw materials, and is matched with a cyclone dust collector, a circulating fan, a feeding system, a material returning device and a bucket elevator to form a vertical raw material grinding system, but the system has the problems of low grinding efficiency, low powder selecting efficiency, large system resistance and the like in the actual production process, so that the power consumption of the system is higher, the yield is not high, and due to the limitation of transformation cost, a cement factory needs to improve the original system at a limited cost to solve the problems.
In the existing vertical raw material grinding system, raw materials fall on a grinding disc through a blanking chute, the grinding disc drives a grinding roller to rotate, under the action of centrifugal rotation of the grinding disc, the raw materials move towards the outer edge of the grinding disc and form a material layer under the limitation of a material blocking ring, and partial large-particle raw materials fly out of the grinding disc without being ground under the action of centrifugal force, if the distance between the material blocking ring and the grinding roller is too large, the large-particle raw materials sliding out from the larger end of the grinding roller can extrude space to cause unstable material layer, the grinding efficiency is reduced, the vibration of the grinding machine is caused, and the power consumption of the system is increased, in addition, the existing vertical raw material grinding system is generally provided with a plurality of cyclone dust collectors to collect ground finished products, an air distribution cone in an air distribution chamber is required to distribute the powder airflow before air enters, the existing air distribution cone only can distribute the powder airflow, and the movement direction of the powder airflow cannot be controlled, raw meal powder is easy to accumulate in the air distribution chamber, so that the system resistance is improved;
the existing vertical mill grinding device is provided with a material blocking structure around a grinding disc, the raw materials between the grinding roller and the grinding disc are rapidly extruded by the grinding roller rotating at a high speed, the retention time of the raw materials on the grinding disc is prolonged, the grinding efficiency is improved, the reduction of the power consumption of a system and the improvement of the yield are realized, the material blocking structure of the split vertical mill with the application number of CN201821891778.6 is realized, a plurality of material blocking rings which are vertically overlapped are arranged, the width of the material blocking structure is maintained by replacing the abraded material blocking rings after long-term use, the width of the material blocking structure is ensured, but the width of the structure is fixed, the distance between the material blocking ring of the grinding disc and the grinding roller in the original design can not be adjusted according to the actual production requirement, the abraded part is only arranged on the inner side of the material blocking ring, the material blocking ring is required to be replaced when the abrasion is serious, and the maintenance cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an energy-saving and yield-increasing cement raw material grinding device aiming at the problems in the prior art.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the energy-saving production-improving cement raw material grinding device comprises raw material vertical grinding equipment, a connecting air channel, an air distribution chamber, a cyclone dust collector and a circulating fan, wherein two ends of the connecting air channel are fixedly connected with the raw material vertical grinding equipment and the top end of the air distribution chamber;
the raw material vertical mill equipment comprises a shell, wherein a vertical mill powder concentrator, a vertical mill grinding roller, a scraping and soot blowing mechanism and a grinding disc are sequentially arranged in the shell from top to bottom, a grinding chute is fixedly arranged on the inner side of the shell, and the grinding chute is obliquely arranged along the outer side of a lower cone of the vertical mill powder concentrator;
the mill circle limit is equipped with outer fender material circle, the inboard that keeps off the material circle outward is equipped with interior fender material circle, the inboard demountable installation that keeps off the material circle in has the baffle, the top that keeps off the material circle in is less than the top that keeps off the material circle outward, the quantity of baffle is a plurality of, a plurality of the mutual butt in both sides of baffle, the baffle is wear-resisting material component.
In some embodiments, the vertical mill powder concentrator is a high-efficiency low-resistance powder concentrator, and comprises an upper shell and a lower cone, wherein a rotor is arranged in the upper shell, a plurality of stationary blades are arranged in the lower cone, and the distance between every two adjacent stationary blades is 79mm-89 mm.
In some embodiments, the number of the vertical grinding rollers is four, the four vertical grinding rollers are uniformly distributed above the grinding disc ring edge, and the four vertical grinding rollers comprise ceramic roller sleeve grinding rollers and surfacing welding roller sleeve grinding rollers.
In some embodiments, the number of the side surfaces of the air dividing cone is the same as that of the air inlet pipes, and the inclined direction of the side surfaces of the air dividing cone is the same as the installation direction of the air inlet pipes.
In some embodiments, the scraping and soot-blowing mechanism is a soot-blowing air pipe with a flat scraper welded on the outer side, and the scraping and soot-blowing mechanism is arranged between two adjacent vertical grinding rollers.
Further, in some embodiments, the side surface of the wind dividing cone is a concave arc surface.
Further, in some embodiments, the outer side of the baffle and the inner side of the inner material blocking ring are provided with a proper clamping structure.
Compared with the prior art, the utility model has the beneficial effects that:
1. by adopting the high-efficiency low-resistance powder concentrator, the ceramic roller sleeve grinding roller, the additionally arranged inner material blocking ring with a detachable structure, and the arranged air dividing cone and the air inlet pipe with the regular pyramid shape, the yield of the device is improved by 20-30t/h, the power consumption of the system is reduced by 1.0-1.5kwh/t, and the running resistance of the cyclone dust collector is reduced from 1600-1000 Pa to 900-1000Pa, so that the device improves the powder concentration efficiency with lower modification cost, reduces the power consumption and the system resistance of the system, and realizes the effects of energy conservation and production improvement;
2. the high-efficiency low-resistance powder concentrator is adopted for powder concentration, the diameter and the height of a rotor of the powder concentrator and the distance between the static blades are increased, the processing capacity and the classification efficiency of the powder concentrator are improved, the powder concentration efficiency is improved, and the yield is improved;
3. the ceramic roller sleeve grinding roller is adopted, so that the wear resistance of the vertical mill grinding roller is improved, the service life is prolonged, the mass of the ceramic roller sleeve is smaller than that of a surfacing welding roller sleeve, the load of a main motor of a mill is effectively reduced, and the energy conservation and consumption reduction of the device are realized;
4. the inner material blocking ring is additionally arranged on the inner side of the outer material blocking ring, so that the integral width of the material blocking structure is increased, the interval between the material blocking ring and the grinding roller is reduced, the stability of a material layer in the grinding process is ensured, the grinding efficiency is improved, the vibration of a grinder is reduced, the power consumption of a main motor is reduced, the detachable baffle structures facilitate operators to adjust the height of the material blocking ring according to the production situation and timely replace abrasion baffles, the material layer keeps the ideal thickness, the adverse effect on the system working condition and the power consumption is reduced, the maintenance cost of the material blocking ring is reduced, and the yield of the device is improved;
5. the air inlet pipe of the cyclone dust collector is provided with the air distribution cone in the shape of the regular pyramid, so that the air with the powder flows along the side surface of the air distribution cone when passing through the air distribution cone and then enters the air inlet pipe after being uniformly distributed, the movement track of the distributed air is limited, the distribution efficiency is improved, raw material powder is prevented from being accumulated in the air distribution chamber, and the system resistance is reduced.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of the grinding roller and disc structure of the vertical mill of the present invention;
FIG. 3 is a top view of a grinding roll and disc configuration of a vertical mill of the present invention;
FIG. 4 is a schematic view of the structure of FIG. 2 at A in accordance with the present invention;
FIG. 5 is a schematic structural view of an air distribution chamber according to embodiment 1 of the present invention;
FIG. 6 is a plan view of the structure of an air distribution chamber according to embodiment 1 of the present invention;
FIG. 7 is a schematic diagram of a conventional air distribution chamber;
FIG. 8 is a top view of a conventional air distribution chamber structure;
FIG. 9 is a schematic structural view of an air distribution chamber according to embodiment 2 of the present invention;
fig. 10 is a plan view of the structure of the air distribution chamber according to embodiment 2 of the present invention.
In the figure: 1. raw material vertical milling equipment; 1.1, grinding the powder concentrator vertically; 1.1.1, a lower cone; 1.2, grinding rollers of a vertical mill; 1.3, feeding into a grinding chute; 1.4, grinding disc; 1.4.1, an outer material blocking ring; 1.4.2, an inner material blocking ring; 2. an air distribution chamber; 2.1, dividing a wind cone; 3. a cyclone dust collector; 3.1, an air inlet pipe; 4. and a circulating fan.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all 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.
Example 1
As shown in fig. 1-6, the energy-saving production-improving cement raw material grinding device comprises a raw material vertical mill device 1, a connecting air duct, an air distribution chamber 2, a cyclone dust collector 3 and a circulating fan 4, wherein two ends of the connecting air duct are fixedly connected with the raw material vertical mill device 1 and the top end of the air distribution chamber 2, an air distribution cone 2.1 is fixedly installed on the inner side of the air distribution chamber 2, an air inlet pipe 3.1 is fixedly installed at the input end of the cyclone dust collector 3, the bottom end of the air distribution chamber 2 is hermetically connected with one end of the air inlet pipe 3.1, the top end of the cyclone dust collector 3 is fixedly connected with one end of the circulating fan 4, the air distribution cone 2.1 is a regular pyramid, and the air distribution cone 2.1 is positioned above the air inlet pipe 3.1.
Compared with the traditional air distribution chamber shown in the figures 7 and 8, the cement raw material grinding device improves the height of the air distribution cone 2.1, changes the shape of the air distribution cone 2.1, has the functions of limiting the distribution direction and dividing the movement area for the powder carrying airflow, can uniformly distribute the powder carrying airflow along each side surface of the air distribution cone 2.1, improves the distribution efficiency, and effectively reduces the probability of raw material powder accumulation inside the air distribution chamber 2.
The raw material vertical mill device 1 comprises a shell, wherein a vertical mill powder concentrator 1.1, a vertical mill grinding roller 1.2, a scraping soot blowing mechanism and a grinding disc 1.4 are sequentially arranged in the shell from top to bottom, a mill feeding chute 1.3 is fixedly arranged on the inner side of the shell, and the mill feeding chute 1.3 is obliquely arranged along the outer side of a lower cone 1.1.1 of the vertical mill powder concentrator 1.1.
The mill 1.4 is circled the limit and is equipped with outer fender material circle 1.4.1, keeps off material circle 1.4.2 in the inboard that material circle 1.4.1 was equipped with outward, and the inboard demountable installation that keeps off material circle 1.4.2 has the baffle in, and the top that keeps off material circle 1.4.2 in is less than outer top that keeps off material circle 1.4.1, and the quantity of baffle is a plurality of, the mutual butt in both sides of a plurality of baffle, and the baffle is wear-resisting material component.
The setting of interior fender material circle 1.4.2, can reduce the interval that keeps off the material circle and found grinding roller 1.2 between, operating personnel can be according to the actual equipment size, the thickness and the height of adjustment fender material circle, prevent that the unground raw materials from receiving the extrusion departure mill 1.4 of founding grinding roller 1.2, system's extrinsic cycle load has been reduced, reach energy saving and consumption reduction's effect, a plurality of dismantled and assembled baffles make operating personnel's altitude mixture control process and maintenance operation more convenient, the height of keeping off the material circle needs operating personnel to rely on experience to carry out slight adjustment, the altitude mixture control direct influence bed of material thickness of fender material circle, the error of millimeter all can have harmful effects to system's operating mode and power consumption.
The vertical mill powder concentrator 1.1 is a high-efficiency low-resistance powder concentrator, the vertical mill powder concentrator 1.1 comprises an upper shell and a lower cone 1.1.1, a rotor is arranged in the upper shell, a plurality of static blades are arranged in the lower cone 1.1.1, and the distance between every two adjacent static blades is 79-89 mm.
Raw materials vertical milling equipment 1 has adopted high-efficient low-resistance type selection powder machine, compares in the inside selection powder machine of traditional vertical roller mill, has increased the diameter and the high numerical value of rotor to increased the area of contact of rotor surface and powder, improved the throughput and the classification efficiency of selection powder machine, the interval of stationary blade is bigger than traditional selection powder machine stationary blade interval, is favorable to improving the classification efficiency of selection powder machine, the inside selection powder machine stationary blade interval of traditional vertical roller mill is 67 mm.
As shown in fig. 3, the number of the vertical grinding rollers 1.2 is four, the four vertical grinding rollers 1.2 are uniformly distributed above the 1.4 circles of the grinding disc, and the four vertical grinding rollers 1.2 comprise ceramic roller sleeve grinding rollers and surfacing roller sleeve grinding rollers.
The arrangement of the grinding roller 1.2 of the vertical grinding mill enables the device to combine the advantages of a ceramic roller sleeve and a surfacing roller sleeve, and the roller sleeve of a part of grinding rollers is upgraded into the ceramic roller sleeve, so that the grinding mill runs more stably, the running pressure and the power consumption of the grinding mill are reduced to the maximum extent under the condition of low modification cost, and the yield of the device is improved.
As shown in fig. 5 and 6, the number of the side surfaces of the wind distribution cone 2.1 is the same as that of the air inlet pipes 3.1, and the inclined direction of the side surfaces of the wind distribution cone 2.1 is the same as that of the air inlet pipes 3.1.
The air distribution cone 2.1 and the air inlet pipe 3.1 are arranged, so that the air flow with powder enters the air inlet pipe 3.1 along each side surface of the air distribution cone 2.1 after being divided, the probability of raw material powder accumulation in the air distribution chamber 2 is reduced, and the system resistance is reduced.
Wherein, scrape the material and blow the soot mechanism and weld the soot blowing tuber pipe that has flat scraper blade for the outside, scrape the material and blow the soot mechanism and set up between two adjacent vertical mill grinding roller 1.2.
Due to the arrangement of the scraping and soot blowing mechanism, finished products ground on the grinding disc 1.4 are blown and are brought into the vertical mill powder concentrator 1.1 for separation, so that the content of fine powder in the materials of the grinding disc 1.4 is reduced, the stability of a material layer is improved, and the effects of increasing the grinding efficiency and reducing the idle work of equipment are achieved.
Wherein, the model of the high-efficiency low-resistance powder concentrator is BSR 6200.
Principle of operation
Raw materials according to the required proportion enter a mill feeding chute 1.3 through conveying equipment, enter a mill 1.4, are rolled by a vertical mill grinding roller 1.2, powdery raw materials are brought into a vertical mill powder concentrator 1.1 by air, qualified products are brought into an air distribution chamber 2 by the air after being sorted by the vertical mill powder concentrator 1.1, are uniformly distributed by an air distribution cone 2.1, and then respectively enter four cyclone dust collectors 3, unqualified products fall into a lower cone body 1.1.1 of the powder concentrator, and continuously return to the mill 1.4 to be milled together with the newly entered raw materials, so that redundant materials which are difficult to be milled into powder in a short time on the mill 1.4 can be discharged from the outer side of the vertical mill 1.4, enter the mill 1.4 to be milled together with the new raw materials through an external circulation system, and the circulation is carried out in the same way, wherein the equipment of the external circulation system is common general knowledge and is not repeated.
Example 2
As shown in fig. 9 and 10, an energy-saving and yield-increasing cement raw material grinding device is improved on the basis of embodiment 1: the side surface of the wind dividing cone 2.1 is a concave cambered surface.
The setting of sunken cambered surface makes four angles of minute wind awl 2.1 bottom more outstanding, prevents that the raw materials powder finished product from piling up in four corners department, has further reduced system resistance.
Example 3
An energy-saving and yield-increasing cement raw material grinding device is improved on the basis of embodiment 1: the outer side of the baffle and the inner side of the inner material blocking ring 1.4.2 are provided with proper clamping structures.
Due to the arrangement of the clamping structure, the installation stability of the baffle is ensured, and meanwhile, the operation difficulty in replacement is reduced.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the utility model, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the utility model can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The energy-saving production-improving cement raw material grinding device is characterized by comprising raw material vertical mill equipment, a connecting air channel, an air distribution chamber, a cyclone dust collector and a circulating fan, wherein two ends of the connecting air channel are fixedly connected with the raw material vertical mill equipment and the top end of the air distribution chamber;
the raw material vertical mill equipment comprises a shell, wherein a vertical mill powder concentrator, a vertical mill grinding roller, a scraping and soot blowing mechanism and a grinding disc are sequentially arranged in the shell from top to bottom, a grinding chute is fixedly arranged on the inner side of the shell, and the grinding chute is obliquely arranged along the outer side of a lower cone of the vertical mill powder concentrator;
the mill circle limit is equipped with outer fender material circle, the inboard that keeps off the material circle outward is equipped with interior fender material circle, the inboard demountable installation that keeps off the material circle in has the baffle, the top that keeps off the material circle in is less than the top that keeps off the material circle outward, the quantity of baffle is a plurality of, a plurality of the mutual butt in both sides of baffle, the baffle is wear-resisting material component.
2. The energy-saving cement raw material grinding device for improving yield according to claim 1, wherein the vertical mill powder concentrator is a high-efficiency low-resistance powder concentrator, the vertical mill powder concentrator comprises an upper shell and a lower cone, a rotor is arranged in the upper shell, a plurality of static blades are arranged in the lower cone, and the distance between every two adjacent static blades is 79-89 mm.
3. The energy-saving production-improving cement raw material grinding device according to claim 1, characterized in that the number of the vertical grinding rollers is four, the four vertical grinding rollers are uniformly distributed above the grinding disc rim, and the four vertical grinding rollers comprise a ceramic roller sleeve grinding roller and a surfacing roller sleeve grinding roller.
4. The energy-saving production-improving cement raw material grinding device as claimed in claim 1, wherein the number of the side surfaces of the air distribution cones is the same as the number of the air inlet pipes, and the inclined direction of the side surfaces of the air distribution cones is the same as the installation direction of the air inlet pipes.
5. The energy-saving production-improving cement raw material grinding device as claimed in claim 1, wherein the scraping soot-blowing mechanism is a soot-blowing air pipe welded with a flat scraper on the outer side, and the scraping soot-blowing mechanism is arranged between two adjacent vertical mill grinding rollers.
6. The energy-saving production-improving cement raw material grinding device according to claim 4, wherein the side surface of the air-dividing cone is a concave arc surface.
7. The energy-saving production-improving cement raw material grinding device as claimed in claim 1, wherein the outer side of the baffle and the inner side of the inner baffle ring are provided with appropriate clamping structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121102219.4U CN215312802U (en) | 2021-05-21 | 2021-05-21 | Energy-saving production-improving cement raw material grinding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121102219.4U CN215312802U (en) | 2021-05-21 | 2021-05-21 | Energy-saving production-improving cement raw material grinding device |
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| CN215312802U true CN215312802U (en) | 2021-12-28 |
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| CN202121102219.4U Active CN215312802U (en) | 2021-05-21 | 2021-05-21 | Energy-saving production-improving cement raw material grinding device |
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