CN116020743B

CN116020743B - A wind selector

Info

Publication number: CN116020743B
Application number: CN202211658708.7A
Authority: CN
Inventors: 任有欢; 张羽飞; 马发红; 杨正波; 谢富冬; 侯志刚
Original assignee: Beijing New Building Material Group Co Ltd; China National Building Materials Innovation and Technology Research Institute Co Ltd; China National Building Material Group Co Ltd CNBM
Current assignee: Beijing New Building Material Group Co Ltd; China National Building Materials Innovation and Technology Research Institute Co Ltd; China National Building Material Group Co Ltd CNBM
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2025-02-11
Anticipated expiration: 2042-12-22
Also published as: CN116020743A; WO2024130822A1

Abstract

A pneumatic separator, the pneumatic separator comprising: an air inlet device for vertical air intake, a dusty airflow channel provided in the air inlet device, the dusty airflow channel comprising guide vanes and an annular rotating chamber, the annular rotating chamber for the dusty airflow to spirally advance under the action of the guide vanes in the annular rotating chamber to separate the particles in the dusty airflow by centrifugal force; the air inlet device is provided with a discharge port connected to the annular rotating chamber, the discharge port is provided for the separated particles to be discharged; and a pneumatic separator, the pneumatic separator is provided with a pneumatic separator channel, the pneumatic separator channel is connected to the discharge port, the pneumatic separator channel is configured to screen the particles discharged from the discharge port by using the wind force against the direction of gravity and the gravity of the particles and discharge the screened particles. The pneumatic separator is used to achieve pneumatic separation of particles according to particle size, and the pneumatic separator has a small flow resistance and low power consumption. The pneumatic separator of the embodiment of the present application can replace the cyclone dust collector in many occasions and produce positive effects.

Description

Air classifier

Technical Field

The present invention relates to, but is not limited to, solid material separation technology, and in particular to a wind separator.

Background

In the breaking, drying and calcining of the desulfurized gypsum, the desulfurized gypsum has high fineness, but large-particle impurities such as stones, sand grains, coal grains and the like can be mixed in the transportation and storage processes of the desulfurized gypsum, and as the desulfurized gypsum breaking equipment only has breaking capacity and extremely small breaking capacity, the large-particle impurities can enter downstream conveying, dedusting and boiling calcining equipment along with air flow and fine powder, so that downstream air flow pipelines, conveying equipment and dedusting equipment are worn. The subsequent large-particle impurities enter the boiling type calcination equipment, and most of the impurities are deposited on the surface of the boiling bed due to the large mass of the impurities, so that the resistance of the boiling type calciner is increased, the boiling effect is poor, even the boiling effect is blocked, and the calcination efficiency is affected.

At present, the gypsum powder calcination industry adopts a fluidized bed which is periodically stopped to finish, so that the maintenance amount is increased, the equipment loss is increased, and the production efficiency is reduced. Currently, there is no apparatus or solution to this problem.

Some gypsum powder manufacturers use cyclone dust collectors for separation. However, the particle size of the cyclone dust collector is uncontrollable, and impurities and fine powder are discharged out of the system at the same time, so that serious material loss is caused.

Disclosure of Invention

The embodiment of the application provides a wind separator. In the air inlet device of the air separator, dust-containing air flow spirally advances in an annular rotating cavity of the air inlet device to centrifuge particles to the air separator. And screening the particles in the winnowing device by utilizing wind force against the gravity direction and different gravities of the particles with different particle diameters, and discharging the screened particles. The wind power in the wind separation device is adjusted to realize the wind separation of the particles according to the particle size of the particles.

The embodiment of the application provides a wind separator which comprises an air inlet device, a wind separation device and a wind separation device, wherein a dust-containing airflow channel is arranged in the air inlet device, the dust-containing airflow channel comprises an annular rotating cavity, the annular rotating cavity is used for enabling dust-containing airflow to go forward in the annular rotating cavity in a spiral mode to separate out particles in the dust-containing airflow by utilizing centrifugal force, the air inlet device is provided with a discharge hole communicated with the annular rotating cavity, the discharge hole is used for discharging the separated particles, the wind separation device is internally provided with a wind separation channel, the wind separation channel is communicated with the discharge hole, and the wind separation channel is arranged to screen and discharge the screened particles by utilizing wind force against the gravity direction and different weights of the particles with different particle diameters.

The embodiment of the application provides a wind separator. The dust-containing air flow spirally advances in the annular rotating cavity of the air inlet device, particles are separated from the dust-containing air flow by utilizing centrifugal force, and the particles are discharged to the air separation device through the discharge hole. In the winnowing device, the particles are subjected to the combined action of wind force against the gravity direction (namely upward wind force) and gravity, so that the particle size screening can be automatically realized. In the process, the gravity of the particles with smaller particle size is insufficient to overcome the wind force, so that the particles can flow back to the annular rotating cavity along with the air flow against the gravity direction through the discharge hole, and the gravity of the particles with larger particle size is sufficient to overcome the wind force and can be discharged under the action of the gravity. Therefore, the air classifier can realize the air classification of particles, can separate stone, sand particles, coal particles and other large-particle impurities from fine powder in the gypsum powder calcining industry, is favorable for avoiding that the large-particle impurities enter downstream conveying, dedusting and boiling calcining equipment along with the fine powder together with air flow, further has a protective effect on downstream air flow pipelines, conveying equipment and dedusting equipment, does not need to stop to arrange a boiling bed regularly, and avoids serious material loss caused by the adoption of a cyclone dust catcher.

In an exemplary embodiment, the air inlet device comprises a shell, an air guide assembly and an annular rotating cavity, wherein the shell is internally provided with a dust-containing airflow channel, the air guide assembly is arranged in the shell, the annular rotating cavity is positioned between the air guide assembly and the shell, and the air guide assembly is arranged to guide dust-containing airflow to spirally advance in the annular rotating cavity.

In an exemplary embodiment, the air guide assembly comprises an air inlet guide body, an annular rotating cavity and at least one layer of guide vanes, wherein the annular rotating cavity is positioned between the air inlet guide body and the shell, and the guide vanes are arranged at the inlet of the annular rotating cavity and are used for guiding dust-containing airflow to spirally advance in the annular rotating cavity. With this embodiment, the inlet air guide causes the dusty airflow to advance along the outer surface of the inlet air guide. The annular rotating cavity is positioned between the air inlet guide body and the shell. The air inlet guide body enables the dust-containing airflow to advance in the annular rotating cavity. The guide vane makes the dust-containing airflow flow spirally, and the guide vane is arranged at the inlet of the annular rotating cavity, so that the dust-containing airflow entering the annular rotating cavity flows spirally. Under the common action of the air inlet guide body and the guide vanes, the dust-containing airflow spirally advances in the annular rotating cavity.

In an exemplary embodiment, the angle of inclination of the guide vane is between 0 and 90 degrees.

In an exemplary embodiment, the air inlet guide body comprises an air inlet guide part, a middle guide part and an air outlet guide part which are sequentially connected, wherein the cross section area of the air inlet guide part is gradually increased along the exhaust direction in the dust-containing airflow channel, the cross section area of the middle guide part is kept unchanged, and the cross section area of the air outlet guide part is gradually reduced. By this embodiment, the inlet air guide guides the dusty air flow into and out of the annular rotating chamber and guides the dusty air flow to advance within the annular rotating chamber. The cross-sectional area of the air inlet guide part is gradually increased, so that dust-containing air flow in the vertical direction is gradually dispersed and guided into the annular rotating cavity. The cross-sectional area of the intermediate flow guide remains unchanged, thereby enabling the dusty airflow to advance along the outer surface of the intermediate flow guide in the annular rotating cavity. The cross-sectional area of the air outlet diversion part gradually reduces, so that the air flow leaving the annular rotating cavity gradually converges and finally continuously flows along the vertical direction.

In an exemplary embodiment, at least one layer of supporting rods is arranged between the air inlet guide body and the shell, and two ends of each supporting rod are respectively connected with the shell and the air inlet guide body. With this embodiment, the support bar is used to further secure the intake air guide.

In an exemplary embodiment, two ends of the guide vane along the radial direction of the annular rotating cavity are respectively connected with the shell and the air inlet guide body. According to the embodiment, the two ends of the guide vane along the radial direction of the annular rotating cavity are respectively connected with the shell and the air inlet guide body, so that the guide vane can be fixed, and the air inlet guide body can be fixed by the guide vane.

In an exemplary embodiment, the housing includes an air inlet housing having a rectifying passage in communication with the annular rotating chamber, the rectifying passage being located upstream of the annular rotating chamber and configured to rectify a dusty air flow into the dusty air flow passage, an intermediate housing coupled to the air inlet housing and having the discharge port, and an air outlet housing coupled to the intermediate housing and having a converging passage in communication with the annular rotating chamber, the converging passage being located downstream of the annular rotating chamber. By this embodiment, the air inlet casing and the air outlet casing of the housing are used for rectifying and stabilizing the flow, the middle casing of the housing defines an annular rotating cavity, and the discharge port is arranged on the middle casing, so that the particles separated from the dust-containing airflow by utilizing the centrifugal force leave the housing through the discharge port.

In an exemplary embodiment, the discharge port includes a plurality of discharge holes arranged at intervals along an axial direction of the annular rotating chamber or a plurality of discharge holes arranged in a spiral shape along a circumferential direction and an axial direction of the annular rotating chamber. By this embodiment it is ensured that particles separated from the dust-laden gas stream by centrifugal force can leave the intermediate housing efficiently via the discharge opening.

In an exemplary embodiment, both ends of the axial direction of the discharge port are located at both ends of the axial direction of the intermediate housing, respectively. By means of the embodiment, the middle shell is ensured to be fully covered by the discharge hole in the axial direction, the separation efficiency is further improved, and the particles separated from the dust-containing airflow by utilizing the centrifugal force can be ensured to efficiently leave the middle shell through the discharge hole.

In an exemplary embodiment, the air inlet housing includes an air inlet connecting pipe and a rectifying housing, the air outlet housing includes an air outlet connecting pipe and a converging housing, the air inlet connecting pipe, the rectifying housing, the middle housing, the converging housing and the air outlet connecting pipe are sequentially connected, the rectifying housing encloses the rectifying channel, the converging housing encloses the converging channel, and along the airflow direction, the cross-sectional area of the rectifying channel is gradually increased, and the cross-sectional area of the converging channel is gradually decreased. By the embodiment, along the air flow direction, the cross section area of the rectifying channel is gradually increased, and the cross section area of the converging channel is gradually reduced, so that the rectifying and steady flow functions of the rectifying channel and the converging channel are realized.

In an exemplary embodiment, the bottom end opening of the rectifying shell is square, and the top end opening of the rectifying shell is circular.

In an exemplary embodiment, the bottom end opening of the rectifying shell is circular, and the top end opening of the rectifying shell is circular.

In an exemplary embodiment, the central axis of the rectifying channel, the central axis of the annular rotating chamber, and the central axis of the converging channel are collinear. By the embodiment, the dust-containing airflow channel extends in the vertical direction, so that the flowing resistance of the dust-containing airflow is reduced, and the power consumption of the air classifier is reduced.

In an exemplary embodiment, the air inlet guiding part of the air inlet guiding body of the air guiding assembly is at least partially located in the rectifying channel, and the air outlet guiding part of the air inlet guiding body of the air guiding assembly is at least partially located in the converging channel. According to the embodiment, the air inlet guide part of the air inlet guide body of the air guide assembly is at least partially positioned in the rectifying channel, so that dust-containing air flow in the rectifying channel is gradually dispersed and guided into the annular rotating cavity. The air outlet guide part of the air inlet guide body of the air guide assembly is at least partially positioned in the converging channel, so that the air flow leaving the annular rotating cavity gradually converges and finally flows continuously along the converging channel.

In an exemplary embodiment, the air inlet and the air outlet of the dust-containing airflow channel are respectively arranged at two ends of the shell in the height direction.

In an exemplary embodiment, the air separation device comprises at least one air screen guide shell, wherein the air screen guide shell is internally provided with the air separation channel, the air screen guide shell is further provided with an air inlet, an air return opening and a discharge opening, the air inlet is used for supplying air screen airflow to the air separation channel so as to take away part of particles, the particles flow back to the annular rotating cavity through the air return opening and the discharge opening, and the discharge opening is used for discharging the particles screened by the air separation device. According to this embodiment, the air separation of the particulate matter can be realized according to the particle size.

In an exemplary embodiment, the air separation device further comprises an air-permeable screen, the air-permeable screen is arranged in the air separation channel and divides the air separation channel into a material area and an air inlet area, the air return opening is arranged at the top of the material area, the material outlet is arranged at the bottom of the material area, the air inlet is arranged at the bottom of the air inlet area, so that materials discharged from the material outlet enter the material area through the air return opening, air flows through the air inlet, enters the air inlet area and passes through the air-permeable screen to carry part of particles in the material area to flow back into the annular rotating cavity through the air return opening and the air outlet, and the residual particles in the material area are discharged through the material outlet. By means of the embodiment, the particles are screened according to the particle size by utilizing wind force against the gravity direction and the gravity of the particles, and the screened particles are discharged through the discharge port.

In an exemplary embodiment, the air separation channel is disposed obliquely with respect to a central axis of the annular rotating chamber. With this embodiment, the air separation passage is provided obliquely with respect to the central axis of the annular rotating chamber, and therefore air separation can be performed by gravity.

In an exemplary embodiment, the air separation device further comprises an air quantity adjusting device, which is arranged at the air inlet and used for adjusting the air quantity of the air inlet so as to adjust the particle size of the screened particles.

In an exemplary embodiment, the air volume adjusting device comprises an air flow driving part which is used for adjusting the air volume of the air inlet by adjusting the working power, or comprises an air volume adjusting valve which is used for adjusting the air volume of the air inlet by adjusting the opening degree of the air inlet.

In an exemplary embodiment, the air inlet is connected with the air flow driving piece to supply air into the air separation channel by the air flow driving piece, or is communicated with the air outlet of the dust-containing air flow channel by a pipeline to supply air into the air separation channel by tail gas discharged by the dust-containing air flow channel, or is communicated with the external atmosphere and is arranged to suck air into the air separation channel under the negative pressure in the dust-containing air flow channel.

In an exemplary embodiment, the air separation device further comprises a material guiding assembly connected with the air inlet device, a material guiding channel communicated with the discharge hole is arranged in the material guiding assembly, and the air return hole is communicated with the discharge hole through the material guiding channel. Through this embodiment, the guide passageway of guide subassembly has realized the intercommunication of discharge gate and return air inlet, has both realized discharging into wind selector through discharge gate and return air inlet with the granule of annular rotatory intracavity centrifugation, has realized flowing back to annular rotatory chamber through return air inlet and discharge gate with the granule that is less than the particle diameter threshold value in the wind selector again.

In an exemplary embodiment, the material guiding assembly comprises a material guiding shell connected with the air inlet device and sealing the material outlet, wherein the material guiding shell and the air inlet device encircle a material guiding groove, a material outlet is formed in the bottom of the material guiding groove, one end of the connecting pipe is connected with the material outlet, the other end of the connecting pipe is connected with the air return port, and the material guiding groove and the inner space of the connecting pipe form the material guiding channel.

In an exemplary embodiment, the discharge port comprises a plurality of discharge holes which are arranged at intervals along the axial direction of the annular rotating cavity, or the discharge port comprises a plurality of discharge holes which are spirally arranged along the circumferential direction and the axial direction of the annular rotating cavity, and the shape of the guide shell is matched with the shape of the discharge port. By this embodiment, the pod shells may be vertically distributed or helically distributed.

In an exemplary embodiment, the number of the discharge holes, the number of the air screen diversion shells and the number of the material guiding components are equal and correspond to each other one by one. Through this embodiment, guaranteed that the particulate matter that leaves annular rotatory chamber through the discharge gate can get into wind selector.

In an exemplary embodiment, the air separation device further comprises a material collecting box, wherein the inlet of the material collecting box is communicated with the material outlet of at least one air screen diversion shell, and an air locking discharger is arranged at the material outlet of the material collecting box. When the air separation device comprises a plurality of material collecting boxes, the particle size threshold values of the air screen diversion shells connected to the same material collecting box can be set to be the same value, and the particle size threshold values of the air screen diversion shells connected to different material collecting boxes are set to be different values, so that classified screening of particles according to particle sizes is realized.

In an exemplary embodiment, the air inlet of the dust-containing air flow channel is connected with an intention machine, or the air inlet of the dust-containing air flow channel is connected with the discharge hole of the mill, the discharge hole of the air separation channel is connected with the feed hole of the mill, or the air separator is a primary dust remover, and the air outlet of the dust-containing air flow channel is connected with a secondary dust remover.

According to the embodiment, when the air inlet of the dust-containing airflow channel is connected with the scattering machine, the air separator can replace a cyclone dust collector used for separation in the gypsum powder production process, when the air inlet of the dust-containing airflow channel is connected with the discharge port of the mill, the discharge port of the air separator is connected with the feed port of the mill, the air separator can replace a cyclone dust collector or a powder separator used for powder separation in other dry fine grinding industries, and when the air separator is arranged as a primary dust collector and the air outlet of the dust-containing airflow channel is connected with a secondary dust collector, the air separator in the embodiment can replace the cyclone dust collector used for primary dust removal in the dust collectors. The air classifier can separate stone, sand particles, coal particles and other large-particle impurities from fine powder in the gypsum powder calcining industry, is favorable for avoiding that the large-particle impurities enter downstream conveying, dedusting and boiling calcining equipment along with the fine powder by air flow, further has a protective effect on downstream air flow pipelines, conveying equipment and dedusting equipment, does not need to stop a fluidized bed regularly, and avoids serious material loss caused by the adoption of a cyclone dust catcher. In addition, the air classifier can be used for powder classifying procedures or used as primary dust removing equipment in a dust removing system in other dry fine grinding industries, and the air classifier can realize air classification of particles according to particle sizes. Meanwhile, the dust-containing airflow channel of the air classifier extends along the vertical direction as a whole, so that the resistance is small and the power consumption is low.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide an understanding of the principles of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the principles of the application.

FIG. 1 is a schematic structural view of an air classifier according to an embodiment of the present application;

FIG. 2 is a schematic top view of a wind separator according to an embodiment of the present application;

FIG. 3 is a schematic structural view of a material guiding assembly according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a winnowing device according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view taken along the direction A-A in FIG. 4;

FIG. 6 is a schematic view of a guide vane of an air guiding assembly according to an embodiment of the present application.

Reference numerals:

100-air separator, 1000-air inlet device, 1100-shell, 1110-air inlet connecting pipe, 1120-rectifying shell, 1130-middle shell, 1131-discharge port, 1132-discharge hole, 1140-converging shell, 1150-air outlet connecting pipe, 1200-air guide component, 1210-guide vane, 1220-air inlet guide body, 1221-air inlet guide part, 1222-middle guide part, 1223-air outlet guide part, 1300-support rod, 1400-dust-containing airflow channel, 1410-rectifying channel, 1420-annular rotating cavity, 1430-converging channel, 2000-air separator, 2100-air screen guide shell, 2110-air inlet, 2120-return port, material outlet, 2200-air-permeable sieve, 2300-air volume adjusting device, 2400-guide component, 2410-guide shell, 2420-connecting pipe, 2430-guide channel, 2431-guide groove, 2500-air separation channel, 2510-material area, 2520-air inlet area, 2600-collecting box, 2700-air discharger.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.

As shown in fig. 1 and 2, an embodiment of the present application provides a wind separator 100, where the wind separator 100 includes an air inlet device 1000, a dust-containing airflow channel 1400 is provided in the air inlet device 1000, the dust-containing airflow channel 1400 includes an annular rotating cavity 1420, the annular rotating cavity 1420 is used for the dust-containing airflow to spiral advance in the annular rotating cavity 1420 to separate out particles in the dust-containing airflow by using centrifugal force, the air inlet device 1000 is provided with a discharge port 1131 communicated with the annular rotating cavity 1420, the discharge port 1131 is used for discharging the separated particles, and a wind separator 2000 is provided in the wind separator 2000, the wind separator 2500 is communicated with the discharge port 1131, and the wind separator 2500 is configured to utilize wind force against gravity direction and different gravity of the particles with different particle diameters to screen the particles discharged from the discharge port 1131 and discharge the screened particles.

The existing cyclone dust collector is provided with side air inlet and high air speed, high-speed air flow enters from the tangent line of the side wall of the volute, rotation is generated through guiding of the cambered surface of the volute, large particles and dust are thrown out through the generated centrifugal force, the dust falls down along the side wall of the volute by means of gravity, is discharged from the bottom, has low air speed and low efficiency, and has no other adjusting means except for adjusting the air speed. The particle size of the cyclone dust collector is not controllable. Particularly, when the cyclone dust collector is used for selecting powder, impurities and fine powder are discharged out of the system at the same time, so that the energy consumption is increased, the material loss is serious, and the powder selecting efficiency of the cyclone dust collector is reduced.

In the present application, the dust-laden air flows spirally advance in the annular rotating chamber 1420 of the air inlet device 1000, and the particles are separated from the dust-laden air flows by centrifugal force and discharged to the air separation device 2000 through the discharge port 1131. In the air separation device 2000, the particles are subjected to the combined action of wind force against the gravity direction (i.e. upward wind force) and gravity, so that the particle size screening can be automatically realized. In this process, the gravity of the smaller particle size particles is insufficient to overcome the wind force, so that the particles flow back to the annular rotating cavity 1420 through the discharge port 1131 along with the air flow against the direction of gravity, while the gravity of the larger particle size particles is sufficient to overcome the wind force, and can be discharged under the action of the gravity. Therefore, the air classifier can realize the air classification of the particulate matters. The particles with the particle size larger than the particle size threshold are particles with larger particle size, and the particles with the particle size smaller than the particle size threshold are particles with smaller particle size. The particle size threshold can be controlled by wind power, so that the screening of the particles according to the particle size is realized, and the screened particles are finally discharged.

The embodiment of the application provides a wind separator 100. The dust-laden air flows spirally advance in the annular rotating chamber 1420 of the air inlet device 1000 of the air classifier 100, and particles are separated from the dust-laden air flows by centrifugal force and discharged to the air classifier 2000 through the discharge port 1131. In the air separation device 2000, the particles are subjected to the combined action of wind force against the gravity direction (i.e. upward wind force) and gravity, so that the particle size screening can be automatically realized. In this process, the gravity of the smaller particle size particles is insufficient to overcome the wind force, so that the particles flow back to the annular rotating cavity 1420 through the discharge port 1131 along with the air flow against the direction of gravity, while the gravity of the larger particle size particles is sufficient to overcome the wind force, and can be discharged under the action of the gravity. Therefore, the air classifier 100 can realize the air classification of particulate matters, can separate stone, sand particles, coal particles and other large-particle impurities from fine powder in the gypsum powder calcining industry, is beneficial to avoiding that the large-particle impurities enter downstream conveying, dedusting and boiling calcining equipment along with the fine powder, further can protect downstream airflow pipelines, conveying equipment and dedusting equipment, does not need to stop a fluidized bed regularly, and avoids serious material loss caused by the adoption of a cyclone dust catcher.

In an exemplary embodiment, as shown in fig. 1 and 2, the air inlet device 1000 includes a housing 1100 and an air guide assembly 1200.

A dusty gas flow channel 1400 is provided within the housing 1100. The air guide assembly 1200 is disposed within the housing 1100, and the annular rotating chamber 1420 is located between the air guide assembly 1200 and the housing 1100, the air guide assembly 1200 being configured to direct the dusty airflow to spiral within the annular rotating chamber 1420.

By this embodiment, a spiral advance of the dusty gas stream within annular rotating chamber 1420 is achieved.

In an exemplary embodiment, as shown in FIGS. 1 and 2, the air guide assembly 1200 includes an air intake baffle 1220 and at least one layer of baffle blades 1210.

An annular rotating chamber 1420 is located between the intake air flow director 1220 and the housing 1100. The guide vane 1210 is provided at the inlet of the annular rotating chamber 1420 and is arranged to guide the dusty gas stream to progress helically within the annular rotating chamber 1420.

In one example, the guide vane 1210 may be one or more layers.

In one example, each layer of guide vanes 1210 includes a plurality of guide vanes 1210 spaced apart along the circumference of the annular rotating cavity 1420. In one example, the plurality of guide vanes 1210 of each layer of guide vanes 1210 are evenly distributed in the circumferential direction.

With this embodiment, the inlet air guide 1220 advances the dusty airflow along the outer surface of the inlet air guide 1220. An annular rotating chamber 1420 is located between the intake air flow director 1220 and the housing 1100. The air intake baffle 1220 advances the dusty airflow within the annular rotating chamber 1420. The guide vane 1210 spirally flows the dust-containing air flow, and the guide vane 1210 is disposed at the inlet of the annular rotating chamber 1420, so that the dust-containing air flow entering the annular rotating chamber 1420 spirally flows. Under the common action of the inlet air guide 1220 and the guide vanes 1210, the dusty airflow advances helically within the annular rotating chamber 1420.

In an exemplary embodiment, the angle of inclination of the guide vane 1210 is between 0 and 90 degrees.

The spiral angle of the dust-laden air stream can be adjusted by adjusting the inclination angle of the guide vane 1210.

In an exemplary embodiment, as shown in fig. 1, the air inlet guiding body 1220 includes an air inlet guiding portion 1221, a middle guiding portion 1222 and an air outlet guiding portion 1223 connected in sequence, wherein along the exhaust direction in the dust-containing airflow channel 1400, the cross-sectional area of the air inlet guiding portion 1221 gradually increases, the cross-sectional area of the middle guiding portion 1222 remains unchanged, and the cross-sectional area of the air outlet guiding portion 1223 gradually decreases.

The air inlet guide 1220 may guide the air flow to be dispersed along the circumferential direction of the annular rotating chamber 1420 into the annular rotating chamber 1420. The intermediate deflector 1222 facilitates the stable travel of the air flow in a helical path along the annular rotating chamber 1420. The air outlet guide part 1223 may also guide the air flow, so that the air flow discharged from the circumferential direction of the annular rotating cavity 1420 may be collected together and discharged.

In one example, the inlet air guide 1221 and the outlet air guide 1223 are tapered or truncated cone, and the middle guide 1222 is straight.

In one example, as shown in FIG. 1, the intake air flow director 1220 is located radially centrally of the housing 1100.

With this embodiment, the air intake baffle 1220 directs the dusty gas stream into and out of the annular rotating chamber 1420 and directs the dusty gas stream to travel within the annular rotating chamber 1420. The cross-sectional area of the inlet air guide 1221 gradually increases, so that the dust-containing air flow in the vertical direction is gradually dispersed and guided into the annular rotating chamber 1420. The cross-sectional area of the intermediate deflector 1222 remains unchanged, thereby allowing the dusty gas stream to travel along the outer surface of the intermediate deflector 1222 within the annular rotating chamber 1420. The cross-sectional area of the air-out guide 1223 gradually decreases, which in turn gradually converges the air flow exiting the annular rotating chamber 1420 and eventually continues to flow in the vertical direction.

In an exemplary embodiment, as shown in fig. 2, the guide vane 1210 is connected to the housing 1100 and the air intake guide 1220 along both ends of the annular rotation chamber 1420 in the radial direction.

In one example, the guide vane 1210 is in a spiral or straight plate shape (as shown in fig. 6).

In this embodiment, the guide vane 1210 is connected to the housing 1100 and the air intake guide 1220 along both ends of the annular rotating chamber 1420 in the radial direction, and the guide vane 1210 may be fixed or the air intake guide 1220 may be fixed by the guide vane 1210.

In an exemplary embodiment, as shown in fig. 1, at least one layer of support rods 1300 is disposed between the air intake air guide 1220 and the housing 1100, and two ends of the support rods 1300 are respectively connected to the housing 1100 and the air intake air guide 1220.

In one example, the number of layers of the support bar 1300 may be one or more.

In one example, each layer of support rods 1300 includes a plurality of support rods 1300 spaced apart along the circumference of an annular rotating cavity 1420.

In one example, the plurality of support rods 1300 of each layer of support rods 1300 are evenly distributed along the circumference of the annular rotating cavity 1420.

With this embodiment, the support bar 1300 is used to further secure the air intake baffle 1220.

In an exemplary embodiment, the housing 1100 includes an air intake housing, an intermediate housing 1130, and an air outlet housing.

The air intake housing is provided with a rectifying channel 1410 in communication with the annular rotating chamber 1420, the rectifying channel 1410 being located upstream of the annular rotating chamber 1420 and being arranged to rectify the dusty air stream entering the dusty air stream channel 1400. The middle housing 1130 is connected to the air intake housing and is provided with a discharge port 1131. The air outlet housing is connected to the intermediate housing 1130 and is provided with a confluence passage 1430 communicating with the annular rotating chamber 1420, the confluence passage 1430 being located downstream of the annular rotating chamber 1420.

The intake housing is located upstream of the annular rotating chamber 1420. In one example, as shown in FIG. 1, the rectifying channel 1410 is located directly below the annular rotating cavity 1420. The rectification passage 1410 is configured to rectify and stabilize the dusty gas stream entering the dusty gas stream passage 1400 in preparation for the dusty gas stream entering the annular rotating chamber 1420.

In one example, as shown in fig. 1, the intermediate housing 1130 and the intermediate deflector 1222 together define an annular rotating cavity 1420. A discharge port 1131 is provided in the intermediate housing 1130 so that particulates separated from the dusty gas stream by centrifugal force exit the intermediate housing 1130 through the discharge port 1131.

The air-out housing is located downstream of the annular rotating cavity 1420. In one example, as shown in FIG. 1, the manifold channel 1430 is located directly above the annular rotating cavity 1420. The converging channel 1430 is configured to rectify and stabilize the dusty gas stream that is about to exit the dusty gas stream channel 1400 in preparation for the dusty gas stream exiting the annular rotating chamber 1420 to exit the dusty gas stream channel 1400.

With this embodiment, the air inlet housing and the air outlet housing of the housing 1100 function to rectify and stabilize flow, the middle housing 1130 of the housing 1100 defines an annular rotating chamber 1420, and by providing the middle housing 1130 with a discharge port 1131, particulate matter separated from the dust-containing gas stream by centrifugal force leaves the housing 1100 through the discharge port 1131.

In an exemplary embodiment, the discharge ports 1131 include a plurality of discharge holes 1132 (as shown in fig. 3) arranged at intervals along the axial direction of the annular rotating chamber 1420 or a plurality of discharge holes 1132 arranged in a spiral shape along the circumferential and axial directions of the annular rotating chamber 1420.

By this embodiment, it is ensured that particles separated from the dusty gas stream by centrifugal force can efficiently leave the intermediate housing 1130 via the discharge port 1131.

In an exemplary embodiment, both ends of the outlet 1131 in the axial direction are located at both ends of the middle housing 1130 in the axial direction, respectively.

With this embodiment, it is ensured that the intermediate housing 1130 is fully covered by the discharge port 1131 in the axial direction, further improving the separation efficiency, and that the particles in the dust-containing gas stream separated by centrifugal force can efficiently leave the intermediate housing 1130 through the discharge port 1131.

In an exemplary embodiment, the air inlet housing includes an air inlet connection pipe 1110 and a rectifying housing 1120, and the air outlet housing includes an air outlet connection pipe 1150 and a junction housing 1140. The air inlet connection pipe 1110, the rectifying casing 1120, the middle casing 1130, the confluence casing 1140, and the air outlet connection pipe 1150 are sequentially connected. The rectifying housing 1120 encloses the rectifying channel 1410, and the bus housing 1140 encloses the bus channel 1430. Along the air flow direction, the cross-sectional area of the rectifying passage 1410 gradually increases, and the cross-sectional area of the bus passage 1430 gradually decreases.

In one example, as shown in fig. 1, the air inlet connection pipe 1110, the rectifying casing 1120, the middle casing 1130, the confluence casing 1140, and the air outlet connection pipe 1150 are connected in order from bottom to top.

With this embodiment, the cross-sectional area of the rectifying passage 1410 is gradually increased and the cross-sectional area of the converging passage 1430 is gradually decreased along the air flow direction, thereby achieving the rectifying and stabilizing effects of the rectifying passage 1410 and the converging passage 1430.

In an exemplary embodiment, the bottom opening of the rectifying casing 1120 is square, and the top opening of the rectifying casing 1120 is circular, so as to be matched with the square air inlet connection pipe 1110.

In an exemplary embodiment, the bottom opening of the rectifying casing 1120 is circular, and the top opening of the rectifying casing 1120 is circular, so as to be matched with the circular air inlet connection pipe 1110.

In an exemplary embodiment, as shown in FIG. 1, the central axis of the rectifying channel 1410, the central axis of the annular rotating chamber 1420, and the central axis of the converging channel 1430 are collinear.

In one example, the air inlet connection pipe 1110 is a circular pipe, the rectifying casing 1120 is a casing having a diameter gradually increasing from bottom to top in a vertical direction, the middle casing 1130 is a circular cylinder, the converging casing 1140 is a casing having a diameter gradually decreasing from bottom to top in a vertical direction, the air outlet connection pipe 1150 is a circular pipe, and the air inlet connection pipe 1110, the rectifying casing 1120, the middle casing 1130, the converging casing 1140, and the air outlet connection pipe 1150 all extend in a vertical direction.

In one example, the air inlet connection pipe 1110 is a square pipe, the rectifying casing 1120 is a casing having a size gradually increasing from bottom to top in a vertical direction (the opening of the bottom end of the rectifying casing 1120 is square and the opening of the top end of the rectifying casing 1120 is circular), the middle casing 1130 is a circular cylinder, the confluence casing 1140 is a casing having a diameter gradually decreasing from bottom to top in a vertical direction, the air outlet connection pipe 1150 is a circular pipe, and the air inlet connection pipe 1110, the rectifying casing 1120, the middle casing 1130, the confluence casing 1140, and the air outlet connection pipe 1150 all extend in a vertical direction.

Because the air inlet connection pipe 1110, the rectifying casing 1120, the middle casing 1130, the converging casing 1140 and the air outlet connection pipe 1150 all extend in the vertical direction, the dust-containing airflow channel 1400 extends in the vertical direction, thereby reducing the resistance of the dust-containing airflow flowing and reducing the power consumption of the air classifier 100.

The existing cyclone dust collector is provided with side air inlet and high air speed, high-speed air flow enters from the tangent line of the side wall of the volute, rotation is generated through guiding of the cambered surface of the volute, large particles and dust are thrown out through the generated centrifugal force, the dust falls down along the side wall of the volute by means of gravity, is discharged from the bottom, has low air speed and low efficiency, and has no other adjusting means except for adjusting the air speed. Cyclone dust collector has high wind speed, high resistance, high power consumption and uncontrollable separated particle size. Particularly, when the cyclone dust collector is used for selecting powder, impurities and fine powder are discharged out of the system at the same time, so that the energy consumption is increased, the material loss is serious, and the powder selecting efficiency of the cyclone dust collector is reduced.

The airflow within the dusty airflow channel 1400 of the present application travels in a vertical direction as a whole, vertically intaking and vertically outputting air. Therefore, the resistance is small and the power consumption is small.

With this embodiment, the dusty airflow channel 1400 extends in a vertical direction, reducing the resistance to the flow of the dusty airflow and reducing the power consumption of the air classifier 100.

In an exemplary embodiment, as shown in fig. 1, the air inlet guide 1221 of the air inlet guide 1220 of the air guide assembly 1200 is at least partially located in the rectifying channel 1410, and the air outlet guide 1223 of the air inlet guide 1220 of the air guide assembly 1200 is at least partially located in the converging channel 1430.

With this embodiment, the air inlet guide portion 1221 of the air inlet guide 1220 of the air guide assembly 1200 is at least partially located in the rectifying channel 1410, so as to gradually disperse and guide the dust-containing air flow in the rectifying channel 1410 into the annular rotating cavity 1420. The air outlet flow guide 1223 of the air inlet flow guide 1220 of the air guide assembly 1200 is at least partially positioned within the converging channel 1430, which in turn causes the air flow exiting the annular rotating chamber 1420 to gradually converge and eventually continue along the converging channel 1430.

In one example, as shown in fig. 1 and 2, the intermediate deflector 1222 is located in the middle of the annular rotating chamber 1420, and also in the center of the intermediate housing 1130, such that the dusty gas stream proceeds within the annular rotating chamber 1420 along the outer surface of the intermediate deflector 1222.

In an exemplary embodiment, the air inlet and the air outlet of the dust-containing airflow channel 1400 are respectively disposed at two ends of the housing 1100 in the height direction.

In one example, as shown in fig. 1, the air inlet is located at the bottom end of the housing 1100 in the height direction, and the air outlet is located at the top end of the housing 1100 in the height direction. The air inlet guiding body 1220 comprises an air inlet guiding part 1221, a middle guiding part 1222 and an air outlet guiding part 1223 which are sequentially connected from bottom to top. The dusty airflow channel 1400 extends upward in a vertical direction, enabling vertical air intake.

With this embodiment, the dusty airflow channel 1400 extends upward in the vertical direction, further reducing the resistance to flow of the dusty airflow and reducing the power consumption of the air classifier 100.

In another example (not shown in the drawings), the air inlet is located at the top end of the height direction of the housing 1100, the air outlet is located at the bottom end of the height direction of the housing 1100, at this time, the air inlet connection pipe 1110, the rectifying housing 1120, the middle housing 1130, the converging housing 1140, and the air outlet connection pipe 1150 are sequentially connected from top to bottom, and the air inlet guide 1220 includes an air inlet guide 1221, a middle guide 1222, and an air outlet guide 1223 sequentially connected from top to bottom. The dusty airflow channel 1400 extends downward in a vertical direction, enabling vertical air intake.

With this embodiment, the dusty gas stream channel 1400 extends downward in the vertical direction.

In an exemplary embodiment, as shown in fig. 4, the air separation device 2000 includes at least one air screen pod 2100. A winnowing channel 2500 is provided in the air screen pod 2100. The air screen pod 2100 also has an air inlet 2110, an air return 2120, and a discharge 2130 in communication with the air classification passageway 2500. The air inlet 2110 supplies air to the air separation channel 2500 to carry away part of the particulate matters, and the particulate matters flow back to the annular rotating cavity 1420 through the air return port 2120 and the discharge port 1131. The discharge opening 2130 is used for discharging the particles screened by the air separation device 2000.

The air separation channel 2500 screens the particles according to the particle size by utilizing wind force against the gravity direction and the gravity of the particles, and discharges the screened particles through the discharge hole 2130, so as to realize the air separation of the particles according to the particle size. In the process, the particles with smaller particle sizes flow back to the annular rotating cavity 1420 along with the air flow of the air screen against the gravity direction through the air return port 2120 and the discharge port 1131, and the particles with larger particle sizes are discharged through the discharge port 2130 under the action of gravity. The particles with the particle size larger than the particle size threshold are particles with larger particle size, and the particles with the particle size smaller than the particle size threshold are particles with smaller particle size. The particle size threshold can be controlled by wind power, so that the screening of the particles according to the particle size is realized, and finally the screened particles are discharged through the discharge outlet 2130. Wherein the inlet 2110 supplies the air flow of the air screen into the air separation passage 2500.

According to this embodiment, the air separation of the particulate matter can be realized according to the particle size.

In an exemplary embodiment, as shown in fig. 4 and 5, the air separation device 2000 further includes an air-permeable screen 2200 disposed within the air separation channel 2500 and dividing the air separation channel 2500 into a material zone 2510 and an air intake zone 2520. The return air port 2120 is provided at the top of the material zone 2510, the discharge opening 2130 is provided at the bottom of the material zone 2510, and the intake port 2110 is provided at the bottom of the intake zone 2520. Thus, material exiting the discharge port 1131 enters the material region 2510 through the return port 2120, air flows through the intake port 2110 into the intake region 2520 and through the air-permeable screen 2200 to carry some of the particles in the material region 2510 back into the annular rotating chamber 1420 through the return port 2120 and the discharge port 1131, and the remaining particles in the material region 2510 are discharged through the discharge port 2130.

In one example, the particulate matter exiting the discharge port 1131 can be tiled on the surface of the breather screen 2200 facing the material zone 2510.

In one example, the air permeable screen 2200 is a mesh or an orifice plate.

The material discharged from the discharge port 1131 enters the material zone 2510 through the air return port 2120, is horizontally paved and glided on the surface of the air permeable screen 2200, the air flow of the air screen enters the air inlet zone 2520 through the air inlet 2110 and passes through the air permeable screen 2200 to carry part of particles in the material zone 2510 to flow back into the annular rotating cavity 1420 through the air return port 2120 and the discharge port 1131, and the rest of particles in the material zone 2510 are discharged through the discharge port 2130, wherein the particle size of the flowing back particles is smaller than a particle size threshold value, and the particle size of the discharged particles is larger than the particle size threshold value.

Because the particles with the particle size smaller than the particle size threshold can move upwards along with the airflow of the air screen, the particle size of the reflowed particles is smaller than the particle size threshold. Since the particulate matter having a particle diameter larger than the particle diameter threshold can move downward by gravity, the particle diameter of the discharged particulate matter is larger than the particle diameter threshold.

By this embodiment, it is possible to screen the particulate matter according to the particle size by using the wind force against the gravitational direction and the gravity of the particulate matter and discharge the screened particulate matter through the discharge port 2130.

In an exemplary embodiment, as shown in FIG. 1, the air classification channels 2500 are disposed obliquely with respect to the central axis of the annular rotating cavity 1420.

With this embodiment, the air separation passage 2500 is inclined with respect to the central axis of the annular rotating chamber 1420, and therefore air separation can be performed by gravity.

In addition, the air inlet 2110 and the discharge outlet 2130 of the air separation channel 2500 are conveniently separated, so that smooth input of air flow and smooth discharge of particles are prevented from being influenced due to discharge of screened particles from the air inlet 2110, and reliable input of air flow and smooth discharge of particles in the air separation channel 2500 are facilitated.

In an exemplary embodiment, as shown in fig. 2 and 4, the air separation device 2000 further includes an air quantity adjusting device 2300 provided at the air inlet 2110 and configured to adjust an air quantity of the air inlet 2110 to adjust a particle size of the screened particulate matter.

The larger the air volume, the larger the wind force, the more particles flow back into the annular rotating chamber 1420, and the larger the average particle diameter threshold value of the particles screened out and discharged.

Conversely, the smaller the air volume, the smaller the wind force, the less particulate matter is returned into the annular rotating chamber 1420, and the smaller the average particle diameter threshold value of the particulate matter which is screened out and discharged.

Like this, control the amount of wind of air inlet 2110 through air regulation device 2300, can realize the regulation of selection by winnowing particle diameter threshold value, the user can carry out reasonable selection according to self needs, is favorable to satisfying user's user demand.

In an exemplary embodiment, the air volume adjusting device 2300 includes an air flow driving member configured to adjust an air volume of the air inlet 2110 by adjusting an operating power, or the air volume adjusting device 2300 includes an air volume adjusting valve configured to adjust an air volume of the air inlet 2110 by adjusting an opening degree of the air inlet 2110.

In one example, the airflow driver is a variable frequency fan that adjusts the operating power through variable frequency to adjust the air volume of the intake 2110.

In one example, the air volume control valve is an electric valve plate, and the air volume of the air inlet 2110 is controlled by adjusting the opening degree of the air inlet 2110.

In an exemplary embodiment, the air inlet 2110 is connected to the air flow driving member to supply air into the air channel 2500 by the air flow driving member, so that the air quantity of the air inlet can be adjusted by controlling the working parameters such as the power/frequency of the air flow driving member, so as to realize on-line automatic control, or the air inlet 2110 is connected to the air outlet of the dust-containing air channel 1400 by a pipeline to supply air into the air channel 2500 by using the tail gas discharged by the dust-containing air channel 1400, or the air inlet 2110 is connected to the outside air, so as to suck air into the air channel 2500 under the action of negative pressure in the dust-containing air channel 1400.

In one example, the air inlet 2110 is configured to communicate with the air outlet of the dust-laden air flow channel 1400 through a pipe to supply air into the air channel 2500 using the exhaust gas discharged from the dust-laden air flow channel 1400, so that the exhaust gas discharged from the dust-laden air flow channel 1400 can be reused, and the use of an air flow driving member can be avoided to further save energy. In this case, an electric valve may be disposed at the air inlet 2110 to control the air volume of the air inlet, thereby realizing on-line automatic control.

In one example, the air intake 2110 is in communication with the outside atmosphere and is configured to draw air into the air duct 2500 under the influence of negative pressure within the dusty air flow channel 1400, avoiding the use of an air flow drive to further conserve energy consumption. In this case, an electric valve may be disposed at the air inlet 2110 to control the air volume of the air inlet, thereby realizing on-line automatic control.

In an exemplary embodiment, as shown in fig. 3, the air separation device 2000 further includes a guide assembly 2400. The material guide assembly 2400 is connected to the air inlet device 1000. A material guiding channel 2430 communicated with the material outlet 1131 is arranged in the material guiding assembly 2400, and the air return port 2120 is communicated with the material outlet 1131 through the material guiding channel 2430.

With this embodiment, the material guiding channel 2430 of the material guiding assembly 2400 realizes the communication between the material outlet 1131 and the air return 2120, so that not only the centrifugal particles in the annular rotating cavity 1420 are discharged into the air separation device 2000 through the material outlet 1131 and the air return 2120, but also the particles smaller than the particle size threshold in the air separation device 2000 are returned to the annular rotating cavity 1420 through the air return 2120 and the material outlet 1131.

In an exemplary embodiment, as shown in fig. 1 and 3, the guide assembly 2400 includes a guide shell 2410 and a connecting tube 2420.

The material guiding shell 2410 is connected with the air inlet device 1000 and covers the material outlet 1131. The material guiding shell 2410 and the air inlet device 1000 are surrounded to form a material guiding groove 2431, and a material outlet is arranged at the bottom of the material guiding groove 2431. One end of the connecting pipe 2420 is connected with the material outlet, the other end is connected with the return port 2120, and the material guiding channel 2430 is formed by the material guiding groove 2431 and the inner space of the connecting pipe 2420.

In one example, a top end of the connection pipe 2420 is connected to the material outlet, and a bottom end of the connection pipe 2420 is connected to the return air port 2120.

In one example, the connection tube 2420 is disposed obliquely with respect to a central axis of the annular rotation chamber 1420.

In an exemplary embodiment, the discharge port 1131 includes a plurality of discharge holes 1132 arranged at intervals along the axial direction of the annular rotating chamber 1420, or the discharge port 1131 includes a plurality of discharge holes 1132 arranged spirally along the circumferential direction and the axial direction of the annular rotating chamber 1420, and the shape of the guide shell 2410 is adapted to the shape of the discharge port 1131.

In other words, when the discharge port 1131 includes a plurality of discharge holes 1132 arranged at intervals along the axial direction of the annular rotating chamber 1420, the casing may have a vertical structure.

When the discharge port 1131 includes a plurality of discharge holes 1132 spirally arranged along the circumferential direction and the axial direction of the annular rotating chamber 1420, the flow guiding shell may have a spiral structure.

In an exemplary embodiment, the number of ports 1131, the number of air screen shells 2100, and the number of guide assemblies 2400 are equal and in a one-to-one correspondence.

The number of the discharge holes 1131 corresponds to the number of the air screen diversion shells 2100 one by one, so that particles leaving the annular rotating cavity 1420 through the discharge holes 1131 can enter the air screen diversion shells 2100, the number of the air screen diversion shells 2100 corresponds to the number of the material guiding assemblies 2400 one by one, and the particles entering the air screen diversion shells 2100 can enter the material guiding assemblies 2400 and finally enter the air separation device 2000.

By this embodiment, it is ensured that the particulate matter exiting the annular rotating chamber 1420 via the outlet 1131 can enter the air separation device 2000.

In an exemplary embodiment, as shown in fig. 1, the air separation device 2000 further includes a collection bin 2600 and a lock discharger 2700.

The inlet of the collection box 2600 communicates with the discharge opening 2130 of the at least one air screen pod 2100. The air lock discharger 2700 is arranged at the discharge opening of the material collection box 2600.

In one example, a airlock discharger 2700 provided at the discharge opening of the aggregate bin 2600 is used to ensure the tightness of the air classifier 100.

In one example, when the air separation device 2000 includes a plurality of material collection boxes 2600, the particle size thresholds of the air screen shells 2100 connected to the same material collection box 2600 may be set to the same value, and the particle size thresholds of the air screen shells 2100 connected to different material collection boxes 2600 may be set to different values, so as to realize the classified screening of the particulate matters according to the particle sizes.

Specifically, for example, the air separation device 2000 includes two aggregate boxes 2600, a first aggregate box 2600 and a second aggregate box 2600, respectively. The particle size thresholds of the air screen pod 2100 connected to the first aggregate tank 2600 are each set to a first particle size threshold, and the particle size thresholds of the air screen pod 2100 connected to the second aggregate tank 2600 are each set to a second particle size threshold. Then, the particle sizes of the particles in the first aggregate box 2600 are all larger than the first particle size threshold, and the particle sizes of the particles in the second aggregate box 2600 are all larger than the second particle size threshold. Illustratively, the second particle size threshold is greater than the first particle size threshold, thereby enabling hierarchical screening of particulate matter by particle size.

For another example, the air separation device 2000 includes three material storage boxes 2600, a first material storage box 2600, a second material storage box 2600, and a third material storage box 2600, respectively. The particle size thresholds of the air-sieve diversion shells 2100 connected to the first aggregate box 2600 are set to be the first particle size threshold, the particle size thresholds of the air-sieve diversion shells 2100 connected to the second aggregate box 2600 are set to be the second particle size threshold, and the particle size thresholds of the air-sieve diversion shells 2100 connected to the third aggregate box 2600 are set to be the third particle size threshold. Then, the particle sizes of the particles in the first aggregate box 2600 are all larger than the first particle size threshold, the particle sizes of the particles in the second aggregate box 2600 are all larger than the second particle size threshold, and the particle sizes of the particles in the third aggregate box 2600 are all larger than the third particle size threshold. Illustratively, the third particle size threshold is greater than the second particle size threshold and the second particle size threshold is greater than the first particle size threshold, thereby enabling hierarchical screening of the particulate matter by particle size.

In an exemplary embodiment, the air inlet of the dust-laden air flow channel 1400 is configured to be connected to a breaker, or the air inlet of the dust-laden air flow channel 1400 is configured to be connected to the outlet 1131 of a mill, the discharge 2130 of the air classification channel 2500 is configured to be connected to the inlet of the mill, or the air classification device 100 is configured as a primary dust separator, and the air outlet of the dust-laden air flow channel 1400 is configured to be connected to a secondary dust separator.

Some gypsum powder manufacturers use cyclone dust collectors for separation. However, the cyclone dust collector has high wind speed, large resistance, large power consumption and uncontrollable particle size, and impurities and fine powder are discharged out of the system at the same time, so that the energy consumption is increased and the material loss is serious. When the air inlet of the dust-laden air flow channel 1400 is configured to be connected to a breaker, the air classifier 100 of the present embodiment may replace a cyclone used for separation during the gypsum powder production process.

In other dry fine grinding industries, the grinding fineness is often required to be very high, grinding efficiency and discharge granularity of mill equipment cannot be accurately controlled, powder selecting equipment needs to be added at an outlet of the mill, and the commonly used powder selecting equipment, such as a cyclone dust collector or a powder selecting device, has large resistance, high power consumption and difficult adjustment of particle diameter of selected particles. When the air inlet of the dust-containing airflow channel 1400 is connected to the discharge outlet 1131 of the mill, the discharge outlet 2130 of the air separation channel 2500 is connected to the feed inlet of the mill, and the air separator 100 in the embodiment of the application can replace a cyclone dust collector or a powder separator used for the powder separation process in other dry fine grinding industries.

In the aspect of dust removal, the current dust removal of the high dust-containing gas is realized by combining a cyclone dust remover with an electrostatic dust remover or a cloth bag dust remover. First, the dust is removed by a cyclone dust collector to reduce the concentration of air flow dust, and then the dust is removed by an electrostatic dust collector or a cloth bag dust collector to reduce the area of the electrostatic dust collector or the cloth bag dust collector and reduce the concentration of discharged dust. However, the cyclone dust collector has the defects of high wind speed, large equipment flow resistance and high power consumption. When the air classifier 100 is configured as a primary dust remover, the air outlet of the dust-containing air flow channel 1400 is configured to be connected to a secondary dust remover, the air classifier 100 in the embodiment of the application may be used instead of a cyclone dust remover for primary dust removal in the dust remover.

According to the embodiment, when the air inlet of the dust-containing airflow channel 1400 is connected with the scattering machine, the air separator 100 in the embodiment of the application can replace a cyclone dust collector used for separation in the gypsum powder production process, and the air separator 100 can separate large particle impurities such as stones, sand grains, coal grains and the like in the gypsum powder calcination industry from fine powder, so that the large particle impurities can be prevented from entering downstream conveying, dust removing and boiling calcination equipment along with the fine powder, further the downstream airflow pipeline, conveying equipment and dust removing equipment can be protected, a fluidized bed is not required to be stopped periodically, and serious material loss caused by the cyclone dust collector is avoided. In addition, the air classifier 100 according to the embodiment of the application can be used for a powder classifying process or used as a primary dust removing device in a dust removing system in other dry fine grinding industries, and can realize air classification of particles according to particle sizes. Meanwhile, since the dust-containing air flow channel 1400 of the air classifier 100 of the present application extends in the vertical direction as a whole, the resistance is small and the power consumption is small.

Example 1

As shown in fig. 1 to 4, the dust-laden air flow enters the dust-laden air flow channel 1400 defined by the housing 1100 through the air inlet connection pipe 1110, and flows through the rectifying channel 1410 defined by the air inlet housing of the dust-laden air flow channel 1400, and the air inlet housing includes the air inlet connection pipe 1110 and the rectifying housing 1120 which are sequentially connected from bottom to top. In the rectifying channel 1410, the dust-containing air flow is rectified and stabilized, an air inlet guide part 1221 of an air inlet guide body 1220 is arranged at the tail end of the rectifying channel 1410, and the dust-containing air flow is introduced into an annular rotating cavity 1420 mainly defined by the middle guide part 1222 of the air inlet guide body 1220 and the middle shell 1130 of the shell 1100 by the air inlet guide part 1221.

In the annular rotating chamber 1420, due to the centrifugal force, the particles in the dust-containing air flow are thrown out through the discharge hole 1131 of the middle housing 1130 to enter the air separator 2000, the rest dust-containing air flow leaves the annular rotating chamber 1420 and upwards enters the confluence channel 1430 defined by the air outlet housing, the air outlet housing comprises a confluence housing 1140 and an air outlet connecting pipe 1150 which are sequentially connected from bottom to top, and finally the air outlet housing is discharged out of the air separator 100 through the air outlet connecting pipe 1150.

The particles entering the air separation device 2000 are discharged from the discharge hole 2130, and the particles smaller than the particle size threshold are fed back to the annular rotating cavity 1420 from the air return hole 2120 through the discharge hole 1131, wherein the particle size threshold can be adjusted by adjusting the air quantity adjusting device 2300.

Specifically, particulate matter entering air separation device 2000 first enters guide channel 2430 of guide assembly 2400, guide channel 2430 includes a space within guide channel 2431 and connecting tube 2420 defined by guide shell 2410, and then enters air screen guide shell 2100 via return air port 2120.

The particles larger than the threshold value of the particle size in the particles entering the air screen diversion shell 2100 are discharged from the discharge outlet 2130 at the bottom end of the air screen diversion shell 2100, and the particles smaller than the threshold value of the particle size flow back to the air return port 2120 and finally return to the annular rotating cavity 1420 through the material guide channel 2430 and the discharge outlet 1131.

Air classifier 100 thus classified the particles having a particle size greater than the particle size threshold and discharged from discharge opening 2130.

Example two

The air separation device 2000 further comprises an aggregate box 2600, wherein an inlet of the aggregate box 2600 is communicated with a discharge hole 2130 of at least one air screen guide shell 2100, and an air locking discharger 2700 is arranged at a discharge hole of the aggregate box 2600. The air locking discharger 2700 is arranged at the discharge opening of the material collection box 2600 and is used for ensuring the tightness of the air classifier 100.

When the air separation device 2000 includes a plurality of material collecting boxes 2600, the particle size threshold of the air screen shell 2100 connected to the same material collecting box 2600 may be set to the same value, and the particle size threshold of the air screen shell 2100 connected to different material collecting boxes 2600 may be set to different values, thereby realizing the classified screening of the particulate matters according to the particle sizes.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms "upper", "lower", "one side", "the other side", "one end", "the other end", "the side", "the opposite", "four corners", "the periphery", "the" mouth "character structure", etc., are directions or positional relationships based on the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structures referred to have a specific direction, are configured and operated in a specific direction, and thus are not to be construed as limiting the present invention.

In describing embodiments of the present invention, unless explicitly stated or limited otherwise, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," "assembled" should be construed broadly, e.g., as being either fixedly connected or detachably connected, or integrally connected, and the terms "mounted," "connected," "fixedly connected" may be either directly or indirectly connected via an intermediate medium, or may be in communication with each other between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Although the embodiments of the present invention are described above, the embodiments are only used for facilitating understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is defined by the appended claims.

Claims

1. A winnowing device, comprising:

An air inlet device, wherein a dust-containing airflow channel is provided in the air inlet device, wherein the dust-containing airflow channel includes an annular rotating chamber, wherein the dust-containing airflow spirally advances in the annular rotating chamber so as to separate particulate matter in the dust-containing airflow by centrifugal force; the air inlet device is provided with a discharge port connected to the annular rotating chamber, wherein the separated particulate matter is discharged; and

A wind selection device, wherein a wind selection channel is provided in the wind selection device, the wind selection channel is connected to the discharge port, and the wind selection channel is configured to utilize wind force against the direction of gravity and different gravity of particles of different particle sizes to screen the particles discharged from the discharge port and discharge the screened particles;

Wherein, the wind selection device comprises: at least one wind screen guide shell, the wind screen guide shell is provided with the wind selection channel, the wind screen guide shell is also provided with an air inlet, an air return port and a discharge port connected with the wind selection channel, the air inlet is used for the wind screen airflow to enter the wind selection channel to take away part of the particles and flow back to the annular rotating chamber through the air return port and the discharge port, and the discharge port is used for the particles screened by the wind selection device to be discharged;

The wind selection device further comprises: an air permeable screen, which is arranged in the wind selection channel and divides the wind selection channel into a material area and an air intake area, the air return port is arranged at the top of the material area, the discharge port is arranged at the bottom of the material area, and the air intake port is arranged at the bottom of the air intake area, so that:

The material discharged from the discharge port enters the material area through the return air port, and the air screen air flows through the air inlet port into the air inlet area and passes through the air permeable screen to carry part of the particles in the material area and flow back into the annular rotating chamber through the return air port and the discharge port, and the remaining particles in the material area are discharged through the discharge port.

2. The air selector according to claim 1, characterized in that the air inlet device comprises:

a housing having a dust-laden airflow passage disposed therein; and

The wind guide component is arranged in the shell, the annular rotating chamber is located between the wind guide component and the shell, and the wind guide component is configured to guide the dust-laden airflow to advance spirally in the annular rotating chamber.

3. The air selector according to claim 2, characterized in that the air guide assembly comprises:

An air inlet guide body, wherein the annular rotating chamber is located between the air inlet guide body and the housing; and

At least one layer of guide vanes is disposed at the entrance of the annular rotating chamber and is configured to guide the dust-laden airflow to advance in a spiral manner in the annular rotating chamber.

4. The air selector according to claim 3 is characterized in that the inclination angle of the guide vane is between 0 and 90 degrees.

5. The air selector according to claim 3, characterized in that:

The air inlet guide body comprises an air inlet guide part, an intermediate guide part and an air outlet guide part which are connected in sequence;

Along the exhaust direction in the dust-laden air flow channel, the cross-sectional area of the air inlet guide portion gradually increases, the cross-sectional area of the middle guide portion remains unchanged, and the cross-sectional area of the air outlet guide portion gradually decreases.

6. The air selector according to claim 3, characterized in that:

At least one layer of support rods is provided between the air inlet guide body and the outer shell, and two ends of the support rods are respectively connected to the outer shell and the air inlet guide body; and/or

Two ends of the guide vane along the radial direction of the annular rotating chamber are respectively connected to the outer shell and the air inlet guide body.

7. The air selector according to any one of claims 2 to 6, characterized in that the housing comprises:

An air inlet housing is provided with a rectifying channel connected to the annular rotating chamber, the rectifying channel is located upstream of the annular rotating chamber, and is configured to rectify the dust-laden airflow entering the dust-laden airflow channel;

an intermediate housing connected to the air inlet housing and provided with the discharge port; and

The air outlet housing is connected to the intermediate housing and is provided with a confluence channel communicated with the annular rotating chamber. The confluence channel is located downstream of the annular rotating chamber.

8. The air selector according to claim 7, characterized in that:

The discharge port comprises a plurality of discharge holes arranged at intervals along the axial direction of the annular rotating chamber or a plurality of discharge holes arranged in a spiral shape along the circumferential direction and the axial direction of the annular rotating chamber; and/or

The two ends of the discharge port in the axial direction are respectively located at the two ends of the intermediate shell in the axial direction.

9. The air selector according to claim 7, characterized in that:

The air inlet housing includes an air inlet connecting pipe and a rectifying shell, and the air outlet housing includes an air outlet connecting pipe and a converging shell, and the air inlet connecting pipe, the rectifying shell, the intermediate housing, the converging shell, and the air outlet connecting pipe are connected in sequence;

The rectifying shell encloses the rectifying channel, and the converging shell encloses the converging channel; along the airflow direction, the cross-sectional area of the rectifying channel gradually increases, and the cross-sectional area of the converging channel gradually decreases.

10. The air selector according to claim 9, characterized in that:

The bottom opening of the fairing shell is square, and the top opening of the fairing shell is circular; or

The bottom opening of the fairing shell is circular, and the top opening of the fairing shell is circular.

11. The air selector according to claim 9, characterized in that:

The central axis of the rectifying channel, the central axis of the annular rotating chamber and the central axis of the converging channel are collinear; and/or

The air inlet guide portion of the air inlet guide body of the air guide assembly is at least partially located in the rectifying channel, and the air outlet guide portion of the air inlet guide body of the air guide assembly is at least partially located in the converging channel.

12. The air selector according to any one of claims 2 to 6, characterized in that:

The air inlet and the air outlet of the dust-laden air flow channel are respectively arranged at two ends of the height direction of the shell.

13. The air selector according to any one of claims 1 to 6, characterized in that:

The air selection channel is arranged obliquely relative to the central axis of the annular rotating chamber.

14. The air selector according to any one of claims 1 to 6, characterized in that the air selector further comprises:

The air volume regulating device is arranged at the air inlet and is configured to regulate the air volume of the air inlet to regulate the particle size of the screened particulate matter.

15. The air selector according to claim 14, characterized in that:

The air volume regulating device comprises an air flow driving member, and the air flow driving member is configured to adjust the air volume of the air inlet by adjusting the working power; or,

The air volume regulating device comprises an air volume regulating valve, and the air volume regulating valve is configured to adjust the air volume of the air inlet by adjusting the opening of the air inlet.

16. The air selector according to any one of claims 1 to 6, characterized in that:

The air inlet is arranged to be connected to an air flow driving member so as to supply air into the air selection channel by means of the air flow driving member; or

The air inlet is arranged to communicate with the air outlet of the dust-laden air flow channel through a pipeline, so as to supply air into the air selection channel using the exhaust gas discharged from the dust-laden air flow channel; or

The air inlet is connected to the outside atmosphere and is configured to suck air into the air selection channel under the action of the negative pressure in the dust-laden air flow channel.

17. The wind separator according to any one of claims 1 to 6, characterized in that the wind separator further comprises:

A material guiding component is connected to the air inlet device. A material guiding channel connected to the material outlet is provided in the material guiding component. The air return port is connected to the material outlet through the material guiding channel.

18. The air selector according to claim 17, wherein the material guide assembly comprises:

A material guide shell connected to the air inlet device and covering the material outlet, wherein the material guide shell and the air inlet device enclose a material guide trough, and a material outlet is provided at the bottom of the material guide trough; and

A connecting pipe, one end of which is connected to the material outlet, and the other end of which is connected to the air return port, and the material guide groove and the internal space of the connecting pipe form the material guide channel.

19. The air selector according to claim 18, characterized in that:

The discharge port includes a plurality of discharge holes arranged at intervals along the axial direction of the annular rotating chamber; or, the discharge port includes a plurality of discharge holes arranged in a spiral manner along the circumferential direction and the axial direction of the annular rotating chamber;

The shape of the material guiding shell is adapted to the shape of the material discharge port.

20. The air selector according to claim 18, characterized in that:

The number of the discharge ports, the number of the wind screen guide shells, and the number of the material guide components are equal and correspond one to one.

21. The wind separator according to any one of claims 1 to 6, characterized in that the wind separator further comprises:

A material collection box, the inlet of which is in communication with a discharge port of at least one of the wind screen guide shells; and

The air-locking discharger is arranged at the discharge port of the collecting box.

22. The air selector according to any one of claims 1 to 6, characterized in that:

The air inlet of the dust-laden air flow channel is arranged to be connected to a dust breaker; or

The air inlet of the dust-laden air flow channel is arranged to be connected to the discharge port of the mill, and the discharge port of the air selection channel is arranged to be connected to the feed port of the mill; or

The air selector is configured as a primary dust collector, and the air outlet of the dust-laden air flow channel is configured to be connected to a secondary dust collector.