CN211802357U - Multi-rotor dynamic powder concentrator for final grinding system of roller press - Google Patents
Multi-rotor dynamic powder concentrator for final grinding system of roller press Download PDFInfo
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- CN211802357U CN211802357U CN202020166804.XU CN202020166804U CN211802357U CN 211802357 U CN211802357 U CN 211802357U CN 202020166804 U CN202020166804 U CN 202020166804U CN 211802357 U CN211802357 U CN 211802357U
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Abstract
The utility model relates to a multi-rotor dynamic powder concentrator for a final grinding system of a roller press, which comprises an air outlet shell, a driving device, a middle shell, a plurality of rotors, guide blades, a lower shell and an air inlet shell; a material returning cone is arranged in the lower shell and is connected with the bottoms of the guide blades around each rotor; the top of each rotor corresponds to an independent air outlet shell and an independent driving device, and the bottom of each air outlet shell is connected with the corresponding rotor; the middle shell is formed by a plurality of circular arc conical surfaces in a surrounding mode, the number of the circular arc conical surfaces is the same as that of the rotors, each rotor corresponds to one circular arc conical surface, and the corresponding rotor and the corresponding circular arc conical surfaces are coaxial; the lower shell and the material returning cone are both surrounded by a plurality of arc conical surfaces. The utility model discloses every rotor top corresponds an independent air-out casing and an independent drive arrangement, and well casing, lower casing and return awl all set to the structure of being enclosed by a plurality of circular arc conical surfaces for business turn over wind gas flow field distributes evenly rationally, has improved selection powder efficiency of selection powder machine.
Description
Technical Field
The utility model belongs to the technical field of the selection powder machine, especially, relate to a many rotors developments selection powder machine that is used for the final grinding system of roll squeezer.
Background
The roller press is used for material grinding, saves 20-50% of electricity compared with a common grinding system, has higher energy-saving and yield-increasing effects, and is widely applied in various countries in the world. The final grinding system of the roller press is the most energy-saving grinding system and is incomparable with other grinding equipment.
However, the final grinding system of the roller press still has some problems to be solved, and taking cement materials as an example, the cement produced by the final grinding of the roller press has large water demand and short setting time, which not only affects the durability of the cement, but also affects the use of the cement. Therefore, the cement roller press final grinding system is proposed to date, and still has not been popularized and widely applied. The properties of cement include many aspects, and there are two main categories in summary, one is the properties of cement itself and one is the properties of cement in concrete. The chemical components and mineral compositions of cement cannot be changed in the cement grinding process, the particle characteristics of the cement are mainly influenced, the water requirement of the standard consistency of the cement and the slump of the concrete are generated, and the key problem to be solved in the final cement grinding product performance of the roller press is also solved.
In order to solve the problem of finished products of the final grinding system of the roller press, a novel powder concentrator meeting the requirements of the final grinding system of the roller press needs to be developed so as to meet the requirements of producing finished products with good working performance.
Chinese patent publication No. CN109332010A, entitled multi-rotor dynamic powder concentrator, powder concentrating method and application, the multi-rotor dynamic powder concentrator is used in a final grinding system of a roller press, but the gas flow field distribution in the inlet and outlet casings is not uniform and reasonable enough, and in order to further improve the working performance of the powder concentrator, it is imperative to optimize the structure of the multi-rotor dynamic powder concentrator.
Disclosure of Invention
The utility model discloses an satisfy the application of the final grinding system of roll squeezer, provided the dynamic selection powder machine of many rotors with adjustable finished product particle size distribution. The multi-rotor dynamic powder concentrator can better control the fineness, the grain composition and the grain shape of a finished product and produce a qualified finished product under the condition that the pressure and the circulation quantity of a roller press are not changed.
The utility model is realized in such a way, a multi-rotor dynamic powder concentrator for a final grinding system of a roller press, which comprises an air outlet casing, a driving device which is positioned at the top of the air outlet casing and drives a rotor to rotate, a middle casing, a rotor positioned inside the middle casing, guide vanes positioned around the rotor, a lower casing positioned at the lower part of the middle casing and an air inlet casing positioned at the lower part of the lower casing; the rotor is provided with a plurality of rotors which are uniformly distributed in the middle shell in the circumferential direction, a material returning cone is arranged in the lower shell, a space is reserved between the material returning cone and the lower shell, and the material returning cone is connected with the bottoms of the guide blades around the rotors;
the top of each rotor corresponds to an independent air outlet shell and an independent driving device, and the bottom of each air outlet shell is connected with the corresponding rotor;
the middle shell is formed by enclosing a plurality of arc conical surfaces, the number of the arc conical surfaces of the middle shell is the same as that of the rotors, each rotor corresponds to one arc conical surface, the corresponding rotor and the corresponding arc conical surface have the same axle center, and the cross section of the middle shell is gradually enlarged from top to bottom;
the lower shell and the return cone are surrounded by a plurality of arc conical surfaces, the arc conical surfaces of the lower shell and the middle shell correspond to each other one by one, the arc conical surfaces of the return cone and the lower shell correspond to each other one by one, and the cross sections of the lower shell and the return cone are gradually reduced from top to bottom.
In the above technical solution, preferably, each of the rotors has a different structural form, including a cylindrical rotor and a conical rotor with different conicity.
In the above technical solution, preferably, the number of the rotors is greater than two.
In the above technical solution, preferably, each driving device drives a corresponding transmission main shaft to rotate, and the transmission main shaft is inserted into the corresponding air outlet housing from top to bottom and connected to the corresponding rotor.
In the above technical solution, preferably, the motor of each driving device is a variable-frequency adjustable-speed motor.
In the above technical scheme, preferably, the cross sections of the lower shell and the material returning cone are gradually reduced to be circular from top to bottom, the bottom of the lower shell is connected with the air inlet shell, the bottom of the material returning cone is connected with a material returning pipe, and the sorted coarse powder is returned to be subjected to secondary grinding or sorting.
The utility model has the advantages and positive effects that:
the utility model discloses a multi-rotor dynamic powder concentrator of roller press final grinding system, simple structure possesses a plurality of rotors, and each rotor top corresponds an independent air-out casing and an independent drive arrangement, and the air-out casing is by an air-out casing of original a plurality of rotors sharing, changes into every rotor and corresponds an air-out casing for the gas flow field distributes evenly rationally in the air-out casing, thereby has improved the powder concentration efficiency of powder concentrator, and can select required product through controlling respectively, adjusting the speed of each rotor and guide vane's angle; finished products can be selected from the air outlet of each air outlet shell, and the angle and the form of the air outlet can be flexibly selected according to the requirements of process arrangement. The middle shell, the lower shell and the return cone are all arranged into a structure formed by encircling a plurality of arc conical surfaces and are matched with corresponding rotors, so that the gas flow field at the air inlet part is uniformly and reasonably distributed, and the powder selection efficiency of the powder selecting machine is further improved.
Drawings
Fig. 1 is a schematic structural diagram of a multi-rotor dynamic powder concentrator provided by an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
FIG. 5 is a cross-sectional view C-C of FIG. 1;
fig. 6 is a partial sectional view of the multi-rotor dynamic powder concentrator according to the embodiment of the present invention.
In the figure: 1. a drive device; 2. an air outlet shell; 3. a rotor; 4. a guide blade; 5. a middle shell; 6. a lower housing; 7. an air inlet housing; 8. returning the material to the cone; 9. a material returning pipe; 10. and (5) driving the main shaft.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 6, the present invention provides a multi-rotor dynamic powder concentrator for a final grinding system of a roller press, which includes an air outlet casing 2, a driving device 1 located at the top of the air outlet casing 2 and driving a rotor 3 to rotate, a middle casing 5, a rotor 3 located inside the middle casing 5, guide vanes 4 located around the rotor 3, a lower casing 6 located at the lower part of the middle casing 5, and an air inlet casing 7 located at the lower part of the lower casing 6; the rotor is provided with a plurality of rotors, the rotors 3 are uniformly distributed in the middle shell 5 in the circumferential direction, a material returning cone 8 is arranged in the lower shell 6, a space is reserved between the material returning cone 8 and the lower shell 6, the material returning cone 8 is connected with the bottoms of the guide blades 4 around the rotors, the angles of the guide blades 4 can be adjusted according to product requirements, the smaller the distance between the guide blades 4 is, the finer the product fineness is, the higher the specific surface is, and the coarse powder which cannot pass through the guide blades and is thrown out by the rotors is collected, mixed and returned for secondary grinding or sorting by the material returning cone;
the top of each rotor 3 corresponds to an independent air outlet shell 2 and an independent driving device 1, the bottom of each air outlet shell 2 is connected with the corresponding rotor 3, finished products can be selected from an air outlet of each air outlet shell, the angle and the form of the air outlet and the air speed of the air outlet during operation can be selected according to the requirements of process arrangement, the flexibility of process arrangement is improved, and the adjustment of the particle size distribution of the finished products is facilitated;
the middle shell 5 is formed by encircling a plurality of arc conical surfaces, the number of the arc conical surfaces of the middle shell 5 is the same as that of the rotors 3, each rotor corresponds to one arc conical surface, the corresponding rotor and the corresponding arc conical surface have the same axle center, and the cross section of the middle shell 5 is gradually enlarged from top to bottom;
the lower shell 6 and the material returning cone 8 are also enclosed by a plurality of arc conical surfaces, the arc conical surface of the lower shell 6 corresponds to the arc conical surface of the middle shell 5 one by one, the arc conical surface of the material returning cone 8 corresponds to the arc conical surface of the lower shell 6 one by one, and the cross sections of the lower shell and the material returning cone are gradually reduced from top to bottom.
In a preferred embodiment, each of the rotors 3 has a different structure, including a cylindrical rotor and a conical rotor with different conicity. The taper of the rotor can be adjusted according to the particle size distribution requirement of the product, and the speed of each rotor can be respectively adjusted during operation, so that the fineness and the particle size distribution of the finished product can be controlled.
As a preferred embodiment, the number of rotors 3 is greater than two. Can be set to be 3, 4 or more according to the requirements of the product. The number of rotors in this embodiment is 3.
As a preferred embodiment, each driving device 1 drives the corresponding transmission main shaft 10 to rotate, and the transmission main shaft 10 is inserted into the corresponding air outlet housing 2 from top to bottom and connected with the corresponding rotor 3.
In a preferred embodiment, the motor of each driving device 1 is a variable frequency and adjustable speed motor. When the motor runs, the rotating speed of each rotor 3 can be adjusted through the corresponding motor at any time, and finished product control is realized.
As a preferred embodiment, the cross sections of the lower shell 6 and the return cone 8 are gradually reduced to be circular from top to bottom, the bottom of the lower shell 6 is connected with the air inlet shell 7, the bottom of the return cone 8 is connected with a return pipe 9, and the separated coarse powder is returned to be subjected to secondary grinding or separation.
The multi-rotor dynamic powder concentrator is applied to a cement roller press final grinding system, and can also be applied to other fields, such as a raw material roller press final grinding system and a slag or steel slag roller press final grinding system, so that the fineness, the grain composition and the grain shape of a finished product can be better controlled, and a qualified finished product can be produced.
The working process of the utility model is as follows:
s1, scattering and primarily sorting the materials, and leading the materials which meet the dynamic sorting to be brought into the multi-rotor dynamic powder concentrator from the air inlet of the air inlet shell by airflow;
s2, dropping part of large particles in the material due to the action of gravity, enabling the other part of large particles to impact an inner cone and drop in the rising process, and finally discharging the dropped material from the bottom of the air inlet shell, wherein the dropped material cannot be taken away by air flow; most of the smaller particles will be carried away by the air flow;
s3, allowing the smaller granular materials carried away by the airflow to pass through gaps among the guide vanes along with the airflow and enter a powder selecting area of the rotor; the rotor selects whitewashed district to form top-down's multilayer horizontal whirl when high-speed rotatory, and layer upon layer plane whirl constantly cuts apart fine particle and coarse grain, and in the horizontal direction, the material has received two opposite power: the drag force and centrifugal force of the gas on the material; the centrifugal force of the material with the particle size smaller than the grading particle size is smaller than the pulling force of the gas on the material, so the material can penetrate through the rotors, continuously rise to the tops of the rotors in rotation, enter the corresponding air outlet shell along with the airflow, is output from the air outlet and is finally collected into a finished product; and the materials with the particle size larger than the grading particle size can be thrown out by the rotor through the guide blades, cannot pass through the rotor and finally fall into a material returning cone below the rotor, and the coarse powder separated by each rotor is returned by the material returning cone through a material returning pipe for secondary grinding or separation.
The utility model discloses the accessible is optimized and is selected the number of selection powder machine rotor, the structural style of each vertical rotor, direction of rotation and rotational speed, makes the interact between the flow field reduce to minimum, makes its advantage of taking into account adjustment finished product gradation and productivity, is the novel high-efficient selection powder machine that is fit for the final grinding system of roll squeezer.
The utility model discloses a multi-rotor dynamic powder concentrator of roller press finish grinding system, simple structure possesses a plurality of rotors, and each rotor top corresponds an independent air-out casing and an independent drive arrangement, and the air-out casing is changed into an air-out casing by a plurality of original rotors sharing an air-out casing, and each rotor corresponds an air-out casing, makes the gas flow field in the air-out casing distribute evenly reasonable, thereby has improved the powder concentration efficiency of powder concentrator, and can select the required product through controlling, adjusting the speed of each rotor and the angle of guide vane respectively; finished products can be selected from the air outlet of each air outlet shell, and the angle and the form of the air outlet can be flexibly selected according to the requirements of process arrangement. The middle shell, the lower shell and the return cone are all arranged into a structure formed by encircling a plurality of arc conical surfaces and are matched with corresponding rotors, so that the gas flow field at the air inlet part is uniformly and reasonably distributed, and the powder selection efficiency of the powder selecting machine is further improved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (6)
1. A multi-rotor dynamic powder concentrator for a final grinding system of a roller press comprises an air outlet shell, a driving device, a middle shell, a rotor, guide blades, a lower shell and an air inlet shell, wherein the driving device is positioned at the top of the air outlet shell and drives the rotor to rotate; the rotor is provided with a plurality of rotors which are uniformly distributed in the middle shell in the circumferential direction, a material returning cone is arranged in the lower shell, a space is reserved between the material returning cone and the lower shell, and the material returning cone is connected with the bottoms of the guide blades around the rotors; it is characterized in that the preparation method is characterized in that,
the top of each rotor corresponds to an independent air outlet shell and an independent driving device, and the bottom of each air outlet shell is connected with the corresponding rotor;
the middle shell is formed by enclosing a plurality of arc conical surfaces, the number of the arc conical surfaces of the middle shell is the same as that of the rotors, each rotor corresponds to one arc conical surface, the corresponding rotor and the corresponding arc conical surface have the same axle center, and the cross section of the middle shell is gradually enlarged from top to bottom;
the lower shell and the return cone are surrounded by a plurality of arc conical surfaces, the arc conical surfaces of the lower shell and the middle shell correspond to each other one by one, the arc conical surfaces of the return cone and the lower shell correspond to each other one by one, and the cross sections of the lower shell and the return cone are gradually reduced from top to bottom.
2. The multi-rotor dynamic powder concentrator for roller press final grinding system according to claim 1, wherein each of the rotors has different structural forms including cylindrical rotor, conical rotor with different conicity.
3. The multi-rotor dynamic powder concentrator for a roller press final grinding system according to claim 1, wherein the number of rotors is more than two.
4. The multi-rotor dynamic powder concentrator for roller press final grinding system according to claim 1, wherein each of the driving devices drives a corresponding transmission main shaft to rotate, and the transmission main shaft is inserted into the corresponding air outlet housing from top to bottom and connected with the corresponding rotor.
5. The multi-rotor dynamic powder concentrator for roller press final grinding system according to claim 1, wherein the motor of each driving device is a variable frequency and adjustable speed motor.
6. The multi-rotor dynamic powder concentrator for the final grinding system of the roller press as recited in claim 1, wherein the cross-section of the lower casing and the return cone gradually decreases from top to bottom to a circular shape, the bottom of the lower casing is connected to the air inlet casing, the bottom of the return cone is connected to a return pipe, and the separated coarse powder is returned to perform secondary grinding or separation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020166804.XU CN211802357U (en) | 2020-02-13 | 2020-02-13 | Multi-rotor dynamic powder concentrator for final grinding system of roller press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020166804.XU CN211802357U (en) | 2020-02-13 | 2020-02-13 | Multi-rotor dynamic powder concentrator for final grinding system of roller press |
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| CN211802357U true CN211802357U (en) | 2020-10-30 |
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| CN202020166804.XU Active CN211802357U (en) | 2020-02-13 | 2020-02-13 | Multi-rotor dynamic powder concentrator for final grinding system of roller press |
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