CN219233106U

CN219233106U - Side air inlet combined powder concentrator

Info

Publication number: CN219233106U
Application number: CN202223055721.1U
Authority: CN
Inventors: 谢传东; 丁瑞; 宋传杰; 何正凯; 郅晓; 叶家元
Original assignee: Cnbm Hefei Powder Technology Equipment Co ltd; China Building Materials Academy CBMA; Hefei Cement Research and Design Institute Co Ltd; China National Building Material Group Co Ltd CNBM
Current assignee: Cnbm Hefei Powder Technology Equipment Co ltd; China Building Materials Academy CBMA; Hefei Cement Research and Design Institute Co Ltd; China National Building Material Group Co Ltd CNBM
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-06-23
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses a side air inlet combined powder concentrator, which comprises a cyclone cylinder, a cyclone separator and a side air inlet and outlet device, wherein the cyclone cylinder is connected with an upper air outlet of the side air inlet and outlet device through an air separation pipe; the side-entering powder separating device comprises an air inlet volute, and main air flow enters the powder separator through the air inlet volute; the air inlet volute comprises guide vanes, the rotating cage is connected with the driving device through a vertical shaft, a vortex field is generated in the separation area by rotating the rotating cage, and coarse powder and fine powder are classified through the interaction of the vortex field and materials; the side air inlet powder concentrator comprises an ash bucket, a tertiary air volute is arranged below the ash bucket, and tertiary air is used for carrying out secondary elutriation on fallen coarse powder. The utility model combines the side air inlet powder concentrator and the cyclone, not only maintains the characteristics of uniform wind field and low resistance of the side air inlet powder concentrator, but also has the advantage of compact structure of the side air inlet combined powder concentrator. And tertiary air can be arranged at the bottom of the powder concentrator, so that qualified fine powder entrained in coarse powder can be reduced, and the separation efficiency and separation precision of the powder concentrator are improved.

Description

Side air inlet combined powder concentrator

Technical Field

The utility model relates to the technical field of powder separators, in particular to a side air inlet combined powder separator.

Background

In the existing cement grinding process, in order to improve the efficiency of a grinding system and reduce the grinding energy consumption, a ring-flow grinding system is generally adopted, and a powder concentrator and a cyclone are taken as important components of the system to play an indispensable role. However, under the conditions of high system yield and large air consumption, the equipment has huge geometric size, and the combined powder concentrator is produced.

At present, a combined powder concentrator is usually a combined form of a lower air inlet powder concentrator and a cyclone, and certain defects exist in the form. The airflow entering the cage rotor of the lower air inlet powder concentrator needs to be turned by 90 degrees, so that the airflow entering the cage rotor is uneven along the height direction of the cage rotor, meanwhile, the material scattering ports of the powder concentrator are limited in number, so that the powder concentrator is difficult to uniformly distribute, the wind field and the material field are uneven, the fine powder finally contains coarse powder, and meanwhile, the fine powder is entrained in the coarse powder, so that the sorting efficiency and the sorting precision of the powder concentrator are reduced, and meanwhile, the system resistance is increased.

Disclosure of Invention

The utility model aims to overcome the technical defects of poor uniformity, low separation efficiency and low separation precision of an air field and a material field of the traditional combined powder concentrator, and provides a side air inlet combined powder concentrator.

The utility model is realized by the following technical scheme:

a side air inlet combined powder concentrator comprises a side air inlet powder separation device and a cyclone cylinder; the side-entering wind powder separating device comprises an air inlet volute, a cage rotor is arranged in the air inlet volute, the cage rotor is connected with a cage rotor rotation driving device through a vertical shaft, a primary air inlet and a secondary air inlet are formed in the side face of the air inlet volute, a plurality of guide blades are arranged on the outer side of the cage rotor in the air inlet volute, a material spreading disc is arranged at the upper end of the cage rotor, a plurality of feeding holes are formed in the top of the air inlet volute, and a reaction plate is arranged in the air inlet volute and close to the circumferential position of the material spreading disc; the outlet of the lower end of the air inlet volute is connected with an ash bucket, the lower end of the ash bucket is connected with a bottom ash bucket through a tertiary air volute, and the side surface of the tertiary air volute is provided with a tertiary air volute lateral air inlet; the cyclone cylinder is connected with an upper air outlet of the air inlet volute through a wind dividing pipe.

The cage type rotor rotation driving device comprises a motor, a speed reducer and a coupler, wherein the motor and the speed reducer are fixed at the top of the air dividing pipe, the motor is connected with the speed reducer through the coupler, the speed reducer is connected with a vertical shaft through the coupler, and the vertical shaft is connected with the cage type rotor through a flange.

The cage rotor rotation driving device is a permanent magnet motor and a coupler.

And a soft connection is arranged between the cyclone cylinder and the air dividing pipe.

And a circumferential labyrinth seal is arranged between the top of the cage-shaped rotor and the air inlet volute.

The inner wall surface of the ash bucket is subjected to wear-resistant treatment or adopts a wear-resistant structure.

And a material accumulation ring is arranged on the inner surface of the ash bucket.

The main air flow enters the powder selecting machine through the air inlet volute; the air flow enters the sorting area through the guiding action of the guide blades; the cage rotor rotation driving device provides rotation power, the cage rotor and the material spreading disc are driven to generate continuous rotation motion through the transmission and conversion of the speed reducer and the coupling, the cage rotor rotates to generate a vortex field in the sorting area, the material spreading disc rotates to finish spreading materials, the materials fall into the sorting area, and classification of coarse and fine powder is realized through interaction of the vortex field and the materials; and a tertiary air volute below the ash bucket, wherein tertiary air is used for carrying out secondary elutriation on the fallen coarse powder. The lateral air inlet of the tertiary air volute meets the requirement that the rotation direction of the tertiary air is consistent with the rotation direction of the main machine.

The circumferential position of the air inlet volute close to the material spreading disc is provided with a counterattack plate, and the counterattack plate is matched with the material spreading disc to be used for spreading and uniformly distributing materials.

The top of the material spreading disc is provided with feed inlets which are uniformly distributed along the circumferential direction, the feed inlets are used for guiding materials to be sorted through a pipeline, and the inside of the pipeline is subjected to wear-resistant treatment.

The arrangement direction of the guide blades changes along with the change of the rotation direction of the air inlet.

The utility model has the advantages that: the side inlet air separation powder device and the cyclone are combined, so that the characteristics of uniform wind field and low resistance of the side inlet air separation powder device are maintained, and the side inlet air separation powder device has the advantage of compact structure. And tertiary air can be arranged at the bottom of the powder concentrator, and coarse powder falling in the separation area can be subjected to secondary elutriation in the presence of the tertiary air, so that qualified fine powder entrained in the coarse powder can be reduced, and the separation efficiency and separation precision of the powder concentrator are further improved.

Drawings

Fig. 1 is a front view of a side air intake combination type powder concentrator of the present embodiment;

FIG. 2 is a cross-sectional view of the side-entry powder concentrator of the present embodiment;

FIG. 3 is a partial view of the side air inlet powder concentrator of the present embodiment at the break-up plate and impact plate

Fig. 4 is a plan view of the side air intake combination type powder concentrator of the present embodiment.

In the figure: 1 speed reducer, 2 motor, 3 branch tuber pipes, 4 feed inlet, 5 whirlwind section of thick bamboo, 6 secondary air intakes, 7 air inlet spiral case, 8 primary air intakes, 9 ash bucket, 10 tertiary air spiral case side direction air intakes, 11 tertiary air spiral case, 12 bottom ash bucket, 13 vertical scroll, 14 guide vane, 15 counterattack board, 16 broadcast flitch, 17 cage rotor, 18 accumulation ring.

Detailed Description

As shown in fig. 1-3, a side air inlet combined powder concentrator comprises a side air inlet powder separation device and a plurality of cyclones 5; the number of the cyclone cylinders 5 is set according to the requirement, and the requirement of streamlines uniform distribution is met; the cyclone cylinder 5 is connected with an upper air outlet of the side-entering air powder separation device through the air separation pipe 3, and meanwhile, the cyclone cylinder 5 is in flexible connection with the middle of the air separation pipe 3; the side-entering wind powder separating device comprises an air inlet volute 7, a primary air inlet 8 and a secondary air inlet 6 are arranged on the side face of the air inlet volute 7, the number of the air inlets of the air inlet volute 7 and the rotating direction are set according to the requirement, and the uniformity of air inlet quantity and air speed is guaranteed. A certain number of guide blades 14 are arranged in the air inlet volute 7, the guide blades 14 are uniformly distributed along the circumferential direction and preset with a certain angle, and the arrangement direction is changed along with the rotation direction of the air inlet; the side-feeding winnowing powder device further comprises a cage-shaped rotor 17 with a material spreading disc 16, and the cage-shaped rotor 17 is connected with a driving device through a vertical shaft 13; an ash bucket 9 is arranged at the bottom of the air inlet volute 7, and the inner wall surface of the ash bucket 9 is required to be subjected to wear-resistant treatment or adopts a wear-resistant structure; the tertiary air volute 11 can be arranged below the ash bucket 9, the lateral surface of the tertiary air volute 11 is provided with the lateral air inlet 10, and falling coarse materials can be subjected to secondary washing at the secondary air inlet, so that fine powder carried in the materials can be reduced, and the rotation direction of the tertiary air is consistent with that of a motor.

The spreader plate 16 needs to meet wear resistance requirements.

The circumferential position of the air inlet volute 7, which is close to the material spreading disc 16, is provided with a counterattack plate 15 which is matched with the material spreading disc 16 for spreading and uniformly distributing materials.

The top of the material spreading disc 16 comprises two or more than two feeding inlets 4, the feeding inlets 4 are used for guiding materials to be sorted through a pipeline, and the positions, which are in contact with the materials, inside the pipeline are subjected to wear-resistant treatment.

And a labyrinth seal is arranged between the top of the cage rotor 17 and the air inlet volute 7, so that short-circuit airflow is reduced.

The cage rotor rotation driving device comprises a motor 2, a speed reducer 1 and a coupler, wherein the motor 2 and the speed reducer 1 are fixed at the top of the air distribution pipe 3, the motor 2 is connected with the speed reducer 1 through the coupler, the speed reducer 1 is connected with a vertical shaft 13 through the coupler, and the vertical shaft 13 is connected with a cage rotor 17 through a flange or other transmission parts. The motor 2 provides motive power to drive the cage rotor 17 to continuously rotate through the speed reducer 1 and the vertical shaft 13. The air inlet volute 7 is fixed on the basis, the air inlet volute 7 is provided with a primary air inlet 8 and a secondary air inlet 6, and under the driving of a draught fan, air flows enter the air inlet volute 7 from the primary air inlet 8 and the secondary air inlet 6, and the air inlet mode can simultaneously ensure that the air flows in the circumferential direction and the height direction of the cage rotor 17 are uniform. The air inlet volute 7 is internally provided with a plurality of guide vanes 14, and air flow enters the sorting area at a specific speed and direction through the air guiding effect of the guide vanes 14. The top of the air inlet volute 7 is provided with a plurality of feed inlets 4, and the surface of the feed inlets 4 contacted with the materials is required to be subjected to wear-resistant treatment or is made of wear-resistant materials. The feeding port 4 continuously feeds the material spreading disc 16, the material spreading disc 16 is driven to rotate by the cage rotor 17, and the material is thrown to the surface of the impact plate 15 fixed in the air inlet volute 7 for material dispersion and uniform distribution, and then falls into the sorting area. The material falling to the separation area is subjected to thickness separation under the interaction with the wind field of the separation area, qualified fine powder passes through the cage rotor 17 to reach the upper air outlet of the air inlet volute 7, and enters the cyclone 5 through the air separation pipe 3 to collect the fine powder, so that the cyclone 5 is fixed on the foundation and flexibly connected with the air separation pipe 3 for convenient installation and vibration reduction of equipment. Coarse powder falls into the ash bucket 9 under the action of gravity, the ash bucket 9 is connected with the outlet at the lower end of the air inlet volute 7, and the inner surface of the ash bucket 9 is provided with a material accumulation ring 18, so that a material pad abrasion-proof shell can be formed, and the material can be thrown to a certain extent. The ash bucket 9 is also provided with a tertiary air volute 11 and a bottom ash bucket 12, the side surface of the tertiary air volute is provided with a tertiary air volute lateral air inlet, and tertiary air carries out secondary elutriation on coarse particles falling from the ash bucket. The elutriated coarse powder then falls into a bottom ash bucket 12 for collection, and the bottom ash bucket is also provided with a material accumulation ring so as to realize the purpose of wear resistance of the shell.

The cage rotor rotation driving device can also be a permanent magnet motor direct drive.

To sum up, the embodiment combines the side air intake powder separating device and the cyclone, so that the characteristics of uniform wind field and low resistance of the side air intake powder separating device are maintained, and the side air intake combined powder selecting machine has the advantage of compact structure. And tertiary air can be arranged at the bottom of the powder concentrator, and coarse powder falling in the separation area can be subjected to secondary elutriation in the presence of the tertiary air, so that qualified fine powder entrained in the coarse powder can be reduced, and the separation efficiency and separation precision of the powder concentrator are further improved.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A side air inlet combined powder concentrator is characterized in that: comprises a side-feeding wind powder separating device and a cyclone cylinder; the side-entering wind powder separating device comprises an air inlet volute, a cage rotor is arranged in the air inlet volute, the cage rotor is connected with a cage rotor rotation driving device through a vertical shaft, a primary air inlet and a secondary air inlet are formed in the side face of the air inlet volute, a plurality of guide blades are arranged on the outer side of the cage rotor in the air inlet volute, a material spreading disc is arranged at the upper end of the cage rotor, a plurality of feeding holes are formed in the top of the air inlet volute, and a reaction plate is arranged in the air inlet volute and close to the circumferential position of the material spreading disc; the outlet of the lower end of the air inlet volute is connected with an ash bucket, the lower end of the ash bucket is connected with a bottom ash bucket through a tertiary air volute, and the side surface of the tertiary air volute is provided with a tertiary air volute lateral air inlet; the cyclone cylinder is connected with an upper air outlet of the air inlet volute through a wind dividing pipe.

2. The side air inlet combined powder concentrator of claim 1, wherein: the cage type rotor rotation driving device comprises a motor, a speed reducer and a coupler, wherein the motor and the speed reducer are fixed at the top of the air dividing pipe, the motor is connected with the speed reducer through the coupler, the speed reducer is connected with a vertical shaft through the coupler, and the vertical shaft is connected with the cage type rotor through a flange.

3. The side air inlet combined powder concentrator of claim 1, wherein: the cage rotor rotation driving device is a permanent magnet motor and a coupler.

4. The side air inlet combined powder concentrator of claim 1, wherein: and a soft connection is arranged between the cyclone cylinder and the air dividing pipe.

5. The side air inlet combined powder concentrator of claim 1, wherein: and a circumferential labyrinth seal is arranged between the top of the cage-shaped rotor and the air inlet volute.

6. The side air inlet combined powder concentrator of claim 1, wherein: the inner wall surface of the ash bucket is subjected to wear-resistant treatment or adopts a wear-resistant structure.

7. The side air inlet combined powder concentrator of claim 1, wherein: and a material accumulation ring is arranged on the inner surface of the ash bucket.