A wind selector

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

Technical Field

[0001] This article relates to but is not limited to solid material separation technology, and in particular to an air separator. Background Art

[0002] During the desulfurization gypsum dispersion, drying and calcination, the desulfurization gypsum itself has high fineness, but during the transportation and storage of the desulfurization gypsum, large impurities such as gravel, sand and coal particles will be mixed in. Since the desulfurization gypsum dispersion equipment only has the ability to disperse and the crushing ability is very small, these large impurities will enter the downstream transportation, dust removal and boiling calcination equipment along with the fine powder along with the airflow, causing wear of the downstream airflow pipeline, transportation equipment and dust removal equipment. Later, large impurities enter the boiling calcination equipment. Due to the large mass of the impurities themselves, most of them will be deposited on the surface of the boiling bed, causing the resistance of the boiling calciner to increase, the boiling effect to deteriorate, and even blockage, affecting the calcination efficiency.

[0003] At present, the gypsum powder calcining industry adopts regular shutdown to clean the fluidized bed, which increases the maintenance workload, increases equipment loss, and reduces production efficiency. At present, there is no equipment or solution to solve this problem.

[0004] 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 from the system at the same time, resulting in serious material loss. Summary of the invention

[0005] The embodiment of the present application provides an air separator. In the air inlet device of the air separator, the dust-laden airflow spirally advances in the annular rotating cavity of the air inlet device, and the particles are centrifuged to the air separator. In the air separator, the particles are screened and discharged by using the wind force against the direction of gravity and the different gravity of particles of different particle sizes. The air separation of particles according to the particle size is achieved by adjusting the wind force in the air separator.

[0006] An embodiment of the present application provides an air separator, which includes: an air inlet device, a dust-containing air flow channel is provided in the air inlet device, and the dust-containing air flow channel includes an annular rotating chamber, and the annular rotating chamber is used for the dust-containing air flow to spirally advance in the annular rotating chamber so as to utilize centrifugal force to separate particulate matter in the dust-containing air flow; the air inlet device is provided with a discharge port connected to the annular rotating chamber, and the separated particulate matter is discharged from the discharge port; and an air separation device, a air separation channel is provided in the air separation device, and the air separation channel is connected to the discharge port, and the air separation channel is configured to utilize wind force against the direction of gravity and the different gravity of particles of different particle sizes to screen the particles discharged from the discharge port and discharge the screened particles.

[0007] The embodiment of the present application provides an air separator. The dust-laden airflow advances in a spiral manner in the annular rotating chamber of the air inlet device, and uses centrifugal force to separate the particulate matter from the dust-laden airflow, and discharges it to the air separator through the discharge port. In the air separator, the particulate matter is automatically screened by the combined effect of the wind force against the direction of gravity (i.e., upward wind force) and gravity. In this process, the gravity of particles with smaller particle sizes is not enough to overcome the wind force, and thus they will flow back to the annular rotating chamber through the discharge port along with the airflow against the direction of gravity; while the gravity of particles with larger particle sizes is sufficient to overcome the wind force, and they can be discharged under the action of gravity. Therefore, the air classifier can realize the air selection of particulate matter, and can separate large particle impurities such as gravel, sand, coal particles, etc. in the gypsum powder calcining industry from fine powder, which is beneficial to prevent these large particle impurities from entering the downstream transportation, dust removal, and boiling calcination equipment along with the fine powder along with the air flow, and then can protect the downstream air flow pipeline, transportation equipment, and dust removal equipment. There is no need to shut down the fluidized bed regularly to tidy up the fluidized bed, and the serious material loss caused by the use of cyclone dust collector is avoided.

[0008] In an exemplary embodiment, the air inlet device includes: a shell, in which a dust-containing airflow channel is provided; and an air guide component, which is provided in the shell, and the annular rotating chamber is located between the air guide component and the shell, and the air guide component is configured to guide the dust-containing airflow to advance spirally in the annular rotating chamber.

[0009] In an exemplary embodiment, the air guide assembly includes: an air inlet guide body, the annular rotating chamber is located between the air inlet guide body and the outer shell; and at least one layer of guide blades, which is provided 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. According to this embodiment, the air inlet guide body allows the dust-laden airflow to advance along the outer surface of the air inlet guide body. The annular rotating chamber is located between the air inlet guide body and the outer shell. The air inlet guide body allows the dust-laden airflow to advance in the annular rotating chamber. The guide blades allow the dust-laden airflow to flow in a spiral manner, and the guide blades are provided at the entrance of the annular rotating chamber, so that the dust-laden airflow entering the annular rotating chamber flows in a spiral manner. Under the combined action of the air inlet guide body and the guide blades, the dust-laden airflow advances in a spiral manner in the annular rotating chamber.

[0010] In an exemplary embodiment, the guide vane has an inclination angle between 0 and 90 degrees.

[0011] In an exemplary embodiment, the air inlet guide body includes an air inlet guide portion, an intermediate guide portion, and an air outlet guide portion connected in sequence; along the exhaust direction in the dusty air flow channel, the cross-sectional area of ​​the air inlet guide portion gradually increases, the cross-sectional area of ​​the intermediate guide portion remains unchanged, and the cross-sectional area of ​​the air outlet guide portion gradually decreases. Through this embodiment, the air inlet guide body guides the dusty air flow into and out of the annular rotating cavity, and guides the dusty air flow to advance in the annular rotating cavity. The cross-sectional area of ​​the air inlet guide portion gradually increases, thereby gradually dispersing and guiding the dusty air flow in the vertical direction into the annular rotating cavity. The cross-sectional area of ​​the intermediate guide portion remains unchanged, thereby allowing the dusty air flow to advance in the annular rotating cavity along the outer surface of the intermediate guide portion. The cross-sectional area of ​​the air outlet guide portion gradually decreases, thereby causing the air flow leaving the annular rotating cavity to gradually converge and eventually continue to flow in the vertical direction.

[0012] In an exemplary embodiment, at least one layer of support rods is provided between the air inlet guide body and the housing, and both ends of the support rods are connected to the housing and the air inlet guide body, respectively. According to this embodiment, the support rods are used to further fix the air inlet guide body.

[0013] In an exemplary embodiment, the two ends of the guide vane along the radial direction of the annular rotating chamber are respectively connected to the housing and the air inlet guide body. According to this embodiment, the two ends of the guide vane along the radial direction of the annular rotating chamber are respectively connected to the housing and the air inlet guide body, which can fix the guide vane or use the guide vane to fix the air inlet guide body.

[0014] In an exemplary embodiment, the housing includes: an air inlet housing, 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 an air outlet housing, connected to the intermediate housing, and provided with a converging channel connected to the annular rotating chamber, the converging channel is located downstream of the annular rotating chamber. Through this embodiment, the air inlet housing and the air outlet housing of the housing function to rectify and stabilize the flow, the intermediate housing of the housing defines the annular rotating chamber, and by providing the discharge port on the intermediate housing, the particles separated from the dust-laden airflow by centrifugal force can leave the housing through the discharge port.

[0015] In an exemplary embodiment, the discharge port includes 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. Through this embodiment, it is ensured that the particles separated from the dust-laden airflow by centrifugal force can efficiently leave the intermediate housing through the discharge port.

[0016] In an exemplary embodiment, the two ends of the discharge port in the axial direction are respectively located at the two ends of the intermediate housing in the axial direction. Through this embodiment, it is ensured that the intermediate housing is fully covered by the discharge port in the axial direction, further improving the separation efficiency, and ensuring that the particles separated from the dust-laden airflow by centrifugal force can efficiently leave the intermediate housing through the discharge port.

[0017] In an exemplary embodiment, 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, wherein the air inlet connecting pipe, the rectifying shell, the intermediate shell, the converging shell, and the air outlet connecting pipe are sequentially connected; 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. Through this embodiment, 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, thereby achieving the rectifying and stabilizing effects of the rectifying channel and the converging channel.

[0018] In an exemplary embodiment, the bottom opening of the fairing shell is square, and the top opening of the fairing shell is circular.

[0019] In an exemplary embodiment, the bottom opening of the fairing shell is circular, and the top opening of the fairing shell is circular.

[0020] 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. Through this embodiment, the dusty airflow channel extends in the vertical direction, reducing the resistance of the dusty airflow and the power consumption of the air selector.

[0021] In an exemplary embodiment, 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. According to this embodiment, 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, thereby gradually dispersing the dust-laden airflow in the rectifying channel and guiding it into the annular rotating chamber. 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, thereby gradually converging the airflow leaving the annular rotating chamber and finally continuing to flow along the converging channel.

[0022] In an exemplary embodiment, an air inlet and an air outlet of the dust-laden air flow channel are respectively disposed at two ends of the housing in a height direction.

[0023] In an exemplary embodiment, the wind selection device includes: 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, a return air port and a discharge port connected to 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 return air port and the discharge port, and the discharge port is used for the particles screened by the wind selection device to be discharged. Through this embodiment, the wind selection of particles can be achieved according to the particle size.

[0024] In an exemplary embodiment, the air selection device further includes: an air-permeable screen, which is arranged in the air selection channel and divides the air selection channel into a material area and an air inlet area, the return air 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 inlet is arranged at the bottom of the air inlet area, so that: the material discharged from the discharge port enters the material area through the return air port, the air screen air flows through the air inlet into the air inlet area and passes through the air-permeable screen to carry part of the particles in the material area back to 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. Through this embodiment, the particles are screened according to the particle size by using the wind force against the direction of gravity and the gravity of the particles, and the screened particles are discharged through the discharge port.

[0025] In an exemplary embodiment, the air selection channel is arranged obliquely relative to the central axis of the annular rotating chamber. According to this embodiment, the air selection channel is arranged obliquely relative to the central axis of the annular rotating chamber, so that gravity can be used for air selection.

[0026] In an exemplary embodiment, the air selection device further includes: an air volume adjustment device, which is disposed at the air inlet and is configured to adjust the air volume of the air inlet to adjust the particle size of the screened particulate matter.

[0027] In an exemplary embodiment, the air volume adjusting device includes an air flow driving member, which is configured to adjust the air volume of the air inlet by adjusting the working power; or, the air volume adjusting device includes an air volume adjusting valve, which is configured to adjust the air volume of the air inlet by adjusting the opening of the air inlet.

[0028] In an exemplary embodiment, the air inlet is configured to be connected to an airflow driving member so as to supply air into the air selection channel by means of the airflow driving member; or the air inlet is configured to be connected to an air outlet of the dust-laden airflow channel through a pipeline so as to supply air into the air selection channel by means of exhaust gas discharged from the dust-laden airflow 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 negative pressure in the dust-laden airflow channel.

[0029] In an exemplary embodiment, the air separation device further includes: a material guide component connected to the air inlet device, a material guide channel connected to the material outlet is provided in the material guide component, and the return air port is connected to the material outlet through the material guide channel. Through this embodiment, the material guide channel of the material guide component realizes the connection between the material outlet and the return air port, which not only realizes that the particles centrifuged in the annular rotating chamber are discharged into the air separation device through the material outlet and the return air port, but also realizes that the particles in the air separation device that are smaller than the particle size threshold value are returned to the annular rotating chamber through the return air port and the material outlet.

[0030] In an exemplary embodiment, the material guide assembly includes: a material guide shell, which is connected to the air inlet device and covers the material outlet, 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 the connecting pipe is connected to the material outlet, and the other end is connected to the return air port, and the internal space of the material guide trough and the connecting pipe forms the material guide channel.

[0031] In an exemplary embodiment, 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 along the circumference and axial direction of the annular rotating chamber; the shape of the guide shell is adapted to the shape of the discharge port. According to this embodiment, the guide shell can be vertically distributed or spirally distributed.

[0032] In an exemplary embodiment, the number of the discharge ports, the number of the wind screen guide shells, and the number of the guide components are equal and correspond one to one. This embodiment ensures that the particles leaving the annular rotating chamber through the discharge ports can enter the air selection device.

[0033] In an exemplary embodiment, the air selection device further includes: a collection box, the inlet of which is connected to the discharge port of at least one of the air screen guide shells; and an air lock discharger, which is arranged at the discharge port of the collection box. Wherein, when the air selection device includes multiple collection boxes, the particle size threshold of the air screen guide shells connected to the same collection box can be set to the same value, and the particle size threshold of the air screen guide shells connected to different collection boxes can be set to different values, so as to achieve graded screening of particulate matter according to particle size.

[0034] In an exemplary embodiment, the air inlet of the dust-laden air flow channel is configured to be connected to a computer; or the air inlet of the dust-laden air flow channel is configured to be connected to a discharge port of a grinder, and the discharge port of the air selection channel is configured to be connected to a feed port of the grinder; 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.

[0035] Through this embodiment, when the air inlet of the dust-laden air flow channel is arranged to be connected to a disperser, the air classifier in the embodiment of the present application can replace the cyclone dust collector used for separation in the gypsum powder production process; when 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 classifier channel is arranged to be connected to the feed port of the mill, the air classifier in the embodiment of the present application can replace the cyclone dust collector or powder classifier used in the powder selection process in other dry fine grinding industries; when the air classifier is arranged as a first-level dust collector and the air outlet of the dust-laden air flow channel is arranged to be connected to a second-level dust collector, the air classifier in the embodiment of the present application can replace the cyclone dust collector used as the first-level dust collector in the dust collector. The air classifier can separate large impurities such as gravel, sand, coal particles, etc. in the gypsum powder calcining industry from fine powder, which is helpful to prevent these large impurities from entering the downstream transportation, dust removal, and boiling calcining equipment along with the airflow and fine powder, and thus can protect the downstream airflow pipeline, transportation equipment, and dust removal equipment. There is no need to shut down the fluidized bed regularly to tidy up the fluidized bed, and it avoids the serious material loss caused by the use of a cyclone dust collector. In addition, the air classifier of the embodiment of the present application can also be used in the powder selection process in other dry fine grinding industries or as a primary dust removal equipment in the dust removal system, and can realize the air selection of particles according to the particle size. At the same time, because the dust-containing airflow channel of the air classifier of the present application extends in the vertical direction as a whole, the resistance is small and the power consumption is small.

[0036] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0038] Figure 1 This is a schematic diagram of the structure of the air selector according to an embodiment of the present application;

[0039] Figure 2 This is a schematic diagram of the top view of the structure of the air selector according to an embodiment of the present application;

[0040] Figure 3 This is a schematic structural diagram of a material guide assembly according to an embodiment of the present application;

[0041] Figure 4 This is a schematic diagram of the structure of the air separation device according to an embodiment of the present application;

[0042] Figure 5 For along Figure 4 Schematic cross-sectional view along the AA direction;

[0043] Figure 6 This is a schematic diagram of the structure of the guide vanes of the wind guide assembly according to an embodiment of the present application.

[0044] Reference numerals:

[0045] 100-air selector; 1000-air inlet device; 1100-housing; 1110-air inlet connecting pipe; 1120-rectifier shell; 1130-middle shell; 1131-discharge port; 1132-discharge hole; 1140-convergence shell; 1150-air outlet connecting pipe; 1200-air guide assembly; 1210-guide blade; 1220-air inlet guide body; 1221-air inlet guide part; 1222-middle guide part; 1223-air outlet guide part; 1300-support rod; 1400-dust-laden airflow channel; 1410-rectifier Channel; 1420-annular rotating chamber; 1430-converging channel; 2000-wind selection device; 2100-wind screen guide shell; 2110-air inlet; 2120-return air outlet; 2130-discharge port; 2200-air permeable screen; 2300-air volume adjustment device; 2400-material guide assembly; 2410-material guide shell; 2420-connecting pipe; 2430-material guide channel; 2431-material guide trough; 2500-wind selection channel; 2510-material area; 2520-air inlet area; 2600-collection box; 2700-wind lock unloader. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0047] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides an air separator 100, which includes: an air inlet device 1000, a dust-containing air flow channel 1400 is provided in the air inlet device 1000, and the dust-containing air flow channel 1400 includes an annular rotating chamber 1420, and the annular rotating chamber 1420 is used for the dust-containing air flow to spirally advance in the annular rotating chamber 1420 so as to utilize centrifugal force to separate the particulate matter in the dust-containing air flow; the air inlet device 1000 is provided with a discharge port 1131 connected to the annular rotating chamber 1420, and the discharge port 1131 is used for discharging the separated particulate matter; and an air separation device 2000, a air separation channel 2500 is provided in the air separation device 2000, and the air separation channel 2500 is connected to the discharge port 1131, and the air separation channel 2500 is configured to utilize the wind force against the direction of gravity and the different gravity of particles of different particle sizes to screen the particles discharged from the discharge port 1131 and discharge the screened particles.

[0048] 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 from the system at the same time, resulting in serious material loss.

[0049] Existing cyclone dust collectors have side air intake and high wind speed. The high-speed airflow enters from the tangent of the volute side wall, and is guided by the volute arc surface to generate rotation. The centrifugal force generated throws out large particles and dust. The dust falls along the volute side wall by gravity and is discharged from the bottom. The lower the wind speed, the lower the efficiency. In addition to adjusting the wind speed, there is no other means of adjustment. The particle size separated by the cyclone dust collector is uncontrollable. Especially when the cyclone dust collector is used for powder selection, impurities and fine powder are discharged from the system at the same time, resulting in increased energy consumption and serious material loss, and reducing the powder selection efficiency of the cyclone dust collector.

[0050] In the present application, the dust-containing airflow spirally advances in the annular rotating chamber 1420 of the air inlet device 1000, and the centrifugal force is used to separate the particles from the dust-containing airflow, and the particles are discharged to the air selection device 2000 through the discharge port 1131. In the air selection device 2000, the particles are subjected to the combined effect of the wind force (i.e., the upward wind force) against the direction of gravity and the gravity, and the particle size screening is automatically achieved. In this process, the gravity of the particles with smaller particle sizes is not enough to overcome the wind force, so they will flow back to the annular rotating chamber 1420 through the discharge port 1131 along with the airflow against the direction of gravity; while the gravity of the particles with larger particle sizes is enough to overcome the wind force, and they can be discharged under the action of gravity. Therefore, the air selector can achieve the air selection of particles. Particles with a particle size greater than the particle size threshold are particles with larger particle sizes, and particles with a particle size less than the particle size threshold are particles with smaller particle sizes. The particle size threshold can be controlled by wind force, so as to achieve the screening of particles according to particle size, and finally discharge the screened particles.

[0051] The embodiment of the present application provides an air separator 100. The dust-laden airflow spirals forward in the annular rotating chamber 1420 of the air inlet device 1000 of the air separator 100, and uses centrifugal force to separate the particulate matter from the dust-laden airflow, and discharges it to the air separator 2000 through the discharge port 1131. In the air separator 2000, the particulate matter is automatically screened by the combined effect of the wind force (i.e., upward wind force) against the direction of gravity and gravity. In this process, the gravity of particles with smaller particle sizes is not enough to overcome the wind force, and thus they will flow back to the annular rotating chamber 1420 through the discharge port 1131 along with the airflow against the direction of gravity; while the gravity of particles with larger particle sizes is sufficient to overcome the wind force, and they can be discharged under the action of gravity. Therefore, the air separator 100 can realize the air separation of particulate matter, and can separate large particle impurities such as gravel, sand, coal particles, etc. in the gypsum powder calcining industry from fine powder, which is beneficial to prevent these large particle impurities from entering the downstream transportation, dust removal, and boiling calcination equipment along with the fine powder along with the air flow, thereby protecting the downstream airflow pipeline, transportation equipment, and dust removal equipment, and there is no need to shut down the boiling bed regularly to tidy up the boiling bed, and avoids the serious material loss caused by the use of cyclone dust collector.

[0052] In an exemplary embodiment, Figure 1 and Figure 2 As shown, the air intake device 1000 includes: a housing 1100 and an air guide assembly 1200 .

[0053] The housing 1100 is provided with a dusty airflow channel 1400. The air guide assembly 1200 is provided in 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 is configured to guide the dusty airflow to spirally advance in the annular rotating chamber 1420.

[0054] Through this implementation, the dust-laden airflow is allowed to advance in a spiral manner in the annular rotating chamber 1420 .

[0055] In an exemplary embodiment, Figure 1 and Figure 2 As shown, the air guide assembly 1200 includes: an air inlet guide body 1220 and at least one layer of guide blades 1210 .

[0056] The annular rotating chamber 1420 is located between the air inlet guide body 1220 and the housing 1100. The guide vane 1210 is disposed at the entrance of the annular rotating chamber 1420, and is configured to guide the dust-laden airflow to advance in a spiral manner in the annular rotating chamber 1420.

[0057] In one example, the guide vane 1210 may be one layer or multiple layers.

[0058] In one example, each layer of guide vanes 1210 includes a plurality of guide vanes 1210 spaced apart along the circumferential direction 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 along the circumferential direction.

[0059] Through this embodiment, the air inlet guide body 1220 allows the dust-laden airflow to advance along the outer surface of the air inlet guide body 1220. The annular rotating chamber 1420 is located between the air inlet guide body 1220 and the housing 1100. The air inlet guide body 1220 allows the dust-laden airflow to advance in the annular rotating chamber 1420. The guide vanes 1210 allow the dust-laden airflow to flow in a spiral manner. The guide vanes 1210 are arranged at the entrance of the annular rotating chamber 1420, so that the dust-laden airflow entering the annular rotating chamber 1420 flows in a spiral manner. Under the combined action of the air inlet guide body 1220 and the guide vanes 1210, the dust-laden airflow advances in a spiral manner in the annular rotating chamber 1420.

[0060] In an exemplary embodiment, the inclination angle of the guide vane 1210 is between 0 and 90 degrees.

[0061] The spiral angle of the dust-laden airflow can be adjusted by adjusting the inclination angle of the guide vane 1210 .

[0062] In an exemplary embodiment, Figure 1 As shown, the air inlet guide body 1220 includes an air inlet guide portion 1221, an intermediate guide portion 1222 and an air outlet guide portion 1223 which are connected in sequence; along the exhaust direction in the dusty air flow channel 1400, the cross-sectional area of ​​the air inlet guide portion 1221 gradually increases, the cross-sectional area of ​​the intermediate guide portion 1222 remains unchanged, and the cross-sectional area of ​​the air outlet guide portion 1223 gradually decreases.

[0063] The air inlet guide 1220 can guide the airflow, so that the airflow is dispersed and enters the annular rotating cavity 1420 along the circumference of the annular rotating cavity 1420. The intermediate guide 1222 facilitates the airflow to stably travel along the annular rotating cavity 1420 in a spiral path. The air outlet guide 1223 can also guide the airflow, so that the airflow discharged from the circumference of the annular rotating cavity 1420 can be collected and discharged.

[0064] In one example, the air inlet guide portion 1221 and the air outlet guide portion 1223 are conical or truncated cone-shaped, and the middle guide portion 1222 is straight-cylindrical.

[0065] In one example, if Figure 1 As shown, the air inlet guide body 1220 is located in the radial center of the housing 1100 .

[0066] Through this embodiment, the air inlet guide body 1220 guides the dust-laden airflow into and out of the annular rotating chamber 1420, and guides the dust-laden airflow to advance in the annular rotating chamber 1420. The cross-sectional area of ​​the air inlet guide portion 1221 gradually increases, thereby gradually dispersing and guiding the dust-laden airflow in the vertical direction into the annular rotating chamber 1420. The cross-sectional area of ​​the intermediate guide portion 1222 remains unchanged, thereby allowing the dust-laden airflow to advance in the annular rotating chamber 1420 along the outer surface of the intermediate guide portion 1222. The cross-sectional area of ​​the air outlet guide portion 1223 gradually decreases, thereby causing the airflow leaving the annular rotating chamber 1420 to gradually converge and eventually continue to flow in the vertical direction.

[0067] In an exemplary embodiment, Figure 2 As shown, the two ends of the guide vane 1210 along the radial direction of the annular rotating chamber 1420 are respectively connected to the housing 1100 and the air inlet guide body 1220 .

[0068] In one example, the guide vane 1210 is in a spiral shape or a straight plate shape (eg Figure 6 as shown).

[0069] Through this embodiment, the two ends of the guide vane 1210 along the radial direction of the annular rotating chamber 1420 are respectively connected to the outer shell 1100 and the air inlet guide body 1220, so that the guide vane 1210 can be fixed, and the air inlet guide body 1220 can also be fixed by the guide vane 1210.

[0070] In an exemplary embodiment, Figure 1 As shown, at least one layer of support rods 1300 is provided between the air inlet guide body 1220 and the outer shell 1100 , and two ends of the support rods 1300 are connected to the outer shell 1100 and the air inlet guide body 1220 , respectively.

[0071] In one example, the number of layers of the support rods 1300 may be one or more layers.

[0072] In one example, each layer of support rods 1300 includes a plurality of support rods 1300 spaced apart along the circumference of the annular rotating chamber 1420 .

[0073] 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 chamber 1420 .

[0074] Through this embodiment, the support rod 1300 is used to further fix the air inlet guide body 1220 .

[0075] In an exemplary embodiment, the housing 1100 includes an air inlet housing, an intermediate housing 1130 and an air outlet housing.

[0076] The air inlet housing is provided with a rectifying channel 1410 communicating with the annular rotating chamber 1420, and the rectifying channel 1410 is located upstream of the annular rotating chamber 1420, and is configured to rectify the dust-laden airflow entering the dust-laden airflow channel 1400. The intermediate housing 1130 is connected to the air inlet 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 converging channel 1430 communicating with the annular rotating chamber 1420, and the converging channel 1430 is located downstream of the annular rotating chamber 1420.

[0077] The air inlet housing is located upstream of the annular rotating chamber 1420. In one example, Figure 1 As shown, the rectifying channel 1410 is located directly below the annular rotating chamber 1420. The rectifying channel 1410 is configured to rectify and stabilize the dust-laden airflow entering the dust-laden airflow channel 1400, so as to prepare the dust-laden airflow for entering the annular rotating chamber 1420.

[0078] In one example, if Figure 1 As shown, the intermediate housing 1130 and the intermediate guide portion 1222 define the annular rotating chamber 1420 together. The intermediate housing 1130 is provided with a discharge port 1131 so that the particles separated from the dust-laden airflow by centrifugal force can leave the intermediate housing 1130 through the discharge port 1131 .

[0079] The air outlet housing is located downstream of the annular rotating chamber 1420. In one example, Figure 1 As shown, the confluence channel 1430 is located directly above the annular rotating chamber 1420. The confluence channel 1430 is configured to rectify and stabilize the dusty airflow that is about to leave the dusty airflow channel 1400, so as to prepare the dusty airflow that leaves the annular rotating chamber 1420 to leave the dusty airflow channel 1400.

[0080] Through this embodiment, the air inlet shell and the air outlet shell of the outer shell 1100 function to rectify and stabilize the flow. The intermediate shell 1130 of the outer shell 1100 defines an annular rotating chamber 1420, and a discharge port 1131 is provided on the intermediate shell 1130 so that the particles in the dust-laden airflow are separated by centrifugal force and leave the outer shell 1100 through the discharge port 1131.

[0081] In an exemplary embodiment, the discharge port 1131 includes a plurality of discharge holes 1132 (such as Figure 3 As shown) or multiple discharge holes 1132 arranged in a spiral shape along the circumference and axial direction of the annular rotating chamber 1420.

[0082] This embodiment ensures that the particles separated from the dust-laden airflow by centrifugal force can efficiently leave the intermediate housing 1130 through the discharge port 1131 .

[0083] In an exemplary embodiment, two ends of the discharge port 1131 in the axial direction are respectively located at two ends of the intermediate housing 1130 in the axial direction.

[0084] This implementation ensures that the intermediate shell 1130 is fully covered by the discharge port 1131 in the axial direction, further improving the separation efficiency and ensuring that the particles separated from the dust-laden airflow by centrifugal force can efficiently leave the intermediate shell 1130 through the discharge port 1131 .

[0085] In an exemplary embodiment, the air inlet housing includes an air inlet connecting pipe 1110 and a fairing shell 1120, and the air outlet housing includes an air outlet connecting pipe 1150 and a converging shell 1140. The air inlet connecting pipe 1110, the fairing shell 1120, the intermediate shell 1130, the converging shell 1140, and the air outlet connecting pipe 1150 are connected in sequence. The fairing shell 1120 encloses a fairing channel 1410, and the converging shell 1140 encloses a converging channel 1430. Along the airflow direction, the cross-sectional area of ​​the fairing channel 1410 gradually increases, and the cross-sectional area of ​​the converging channel 1430 gradually decreases.

[0086] In one example, if Figure 1 As shown, the air inlet connecting pipe 1110, the rectifying shell 1120, the intermediate shell 1130, the converging shell 1140, and the air outlet connecting pipe 1150 are connected in sequence from bottom to top.

[0087] Through this embodiment, along the airflow direction, the cross-sectional area of ​​the rectifying channel 1410 gradually increases, and the cross-sectional area of ​​the converging channel 1430 gradually decreases, thereby achieving the rectifying and flow stabilizing effects of the rectifying channel 1410 and the converging channel 1430 .

[0088] In an exemplary embodiment, the bottom opening of the fairing shell 1120 is square, and the top opening of the fairing shell 1120 is circular, so as to be compatible with the square air inlet connecting pipe 1110 .

[0089] In an exemplary embodiment, the bottom opening of the fairing shell 1120 is circular, and the top opening of the fairing shell 1120 is circular, so as to be compatible with the circular air inlet connecting pipe 1110 .

[0090] In an exemplary embodiment, Figure 1 As shown, the central axis of the rectifying channel 1410, the central axis of the annular rotating cavity 1420, and the central axis of the converging channel 1430 are collinear.

[0091] In one example, the air inlet connecting pipe 1110 is a circular tube, the fairing shell 1120 is a shell whose diameter gradually increases from bottom to top in the vertical direction, the intermediate shell 1130 is a circular cylinder, the confluence shell 1140 is a shell whose diameter gradually decreases from bottom to top in the vertical direction, and the air outlet connecting pipe 1150 is a circular tube; and the air inlet connecting pipe 1110, the fairing shell 1120, the intermediate shell 1130, the confluence shell 1140 and the air outlet connecting pipe 1150 all extend in the vertical direction.

[0092] In one example, the air inlet connecting pipe 1110 is a square tube, the fairing shell 1120 is a shell whose size gradually increases from bottom to top in the vertical direction (the bottom opening of the fairing shell 1120 is square and the top opening of the fairing shell 1120 is circular), the intermediate shell 1130 is a circular cylinder, the confluence shell 1140 is a shell whose diameter gradually decreases from bottom to top in the vertical direction, and the air outlet connecting pipe 1150 is a circular tube; and the air inlet connecting pipe 1110, the fairing shell 1120, the intermediate shell 1130, the confluence shell 1140 and the air outlet connecting pipe 1150 all extend in the vertical direction.

[0093] Since the air inlet connecting pipe 1110, the fairing shell 1120, the intermediate shell 1130, the confluence shell 1140 and the air outlet connecting pipe 1150 all extend in the vertical direction, the dusty airflow channel 1400 extends in the vertical direction, thereby reducing the resistance of the dusty airflow flow and reducing the power consumption of the air selector 100.

[0094] Existing cyclone dust collectors have side wind inlet and high wind speed. The high-speed airflow enters from the tangent of the volute side wall, and is guided by the volute arc surface to generate rotation. The large particles and dust are thrown out by the centrifugal force generated. The dust falls along the volute side wall by gravity and is discharged from the bottom. The lower the wind speed, the lower the efficiency. In addition to adjusting the wind speed, there is no other means of adjustment. The cyclone dust collector has a high wind speed, large resistance, high power consumption, and the separated particle size is uncontrollable. Especially when the cyclone dust collector is used for powder selection, impurities and fine powder are discharged from the system at the same time, resulting in increased energy consumption and serious material loss, and reducing the powder selection efficiency of the cyclone dust collector.

[0095] The airflow in the dusty airflow channel 1400 of the present application generally moves in a vertical direction, with vertical air intake and vertical air discharge, so the resistance is small and the power consumption is small.

[0096] Through this embodiment, the dust-laden airflow channel 1400 extends in the vertical direction, which reduces the resistance of the dust-laden airflow and reduces the power consumption of the air selector 100 .

[0097] In an exemplary embodiment, Figure 1As shown, the air inlet guide portion 1221 of the air inlet guide body 1220 of the air guide assembly 1200 is at least partially located in the rectifying channel 1410 , and the air outlet guide portion 1223 of the air inlet guide body 1220 of the air guide assembly 1200 is at least partially located in the converging channel 1430 .

[0098] According to this embodiment, the air inlet guide portion 1221 of the air inlet guide body 1220 of the air guide assembly 1200 is at least partially located in the rectifying channel 1410, so as to gradually disperse the dust-laden airflow in the rectifying channel 1410 and guide it into the annular rotating chamber 1420. The air outlet guide portion 1223 of the air inlet guide body 1220 of the air guide assembly 1200 is at least partially located in the converging channel 1430, so that the airflow leaving the annular rotating chamber 1420 gradually converges and finally continues to flow along the converging channel 1430.

[0099] In one example, if Figure 1 and Figure 2 As shown, the middle guide portion 1222 is located in the middle of the annular rotating chamber 1420 and also in the center of the middle shell 1130 , so that the dust-laden airflow advances in the annular rotating chamber 1420 along the outer surface of the middle guide portion 1222 .

[0100] In an exemplary embodiment, the air inlet and the air outlet of the dust-laden air flow channel 1400 are respectively disposed at two ends in the height direction of the housing 1100 .

[0101] In one example, if Figure 1 As shown, the air inlet is located at the bottom of the housing 1100 in the height direction, and the air outlet is located at the top of the housing 1100 in the height direction. The air inlet guide 1220 includes an air inlet guide portion 1221, an intermediate guide portion 1222, and an air outlet guide portion 1223 connected in sequence from bottom to top. The dust-laden airflow channel 1400 extends upward in the vertical direction to achieve vertical air inlet.

[0102] Through this embodiment, the dust-laden airflow channel 1400 extends upward in the vertical direction, further reducing the resistance of the dust-laden airflow flow and reducing the power consumption of the air selector 100 .

[0103] In another example (not shown in the figure), the air inlet is located at the top of the housing 1100 in the height direction, and the air outlet is located at the bottom of the housing 1100 in the height direction; in this case, the air inlet connecting pipe 1110, the rectifying shell 1120, the intermediate shell 1130, the converging shell 1140, and the air outlet connecting pipe 1150 are connected in sequence from top to bottom; and the air inlet guide body 1220 includes an air inlet guide part 1221, an intermediate guide part 1222, and an air outlet guide part 1223 connected in sequence from top to bottom. The dust-laden airflow channel 1400 extends downward in the vertical direction to achieve vertical air inlet.

[0104] With this embodiment, the dust-laden airflow channel 1400 extends downward in the vertical direction.

[0105] In an exemplary embodiment, Figure 4 As shown, the air selection device 2000 includes at least one air screen guide shell 2100. An air selection channel 2500 is provided in the air screen guide shell 2100. The air screen guide shell 2100 is also provided with an air inlet 2110, an air return port 2120 and a discharge port 2130 connected to the air selection channel 2500. The air inlet 2110 is used for the air screen airflow to enter the air selection channel 2500 to carry away part of the particles and flow back to the annular rotating chamber 1420 through the air return port 2120 and the discharge port 1131. The discharge port 2130 is used for discharging the particles screened by the air selection device 2000.

[0106] In the air selection channel 2500, the particles are screened according to the particle size by using the wind force against the direction of gravity and the gravity of the particles, and the screened particles are discharged through the discharge port 2130, so as to realize the air selection of particles according to the particle size. In this process, particles with smaller particle sizes flow back to the annular rotating chamber 1420 through the return air port 2120 and the discharge port 1131 along with the wind screen airflow against the direction of gravity; particles with larger particle sizes are discharged through the discharge port 2130 under the action of gravity. Particles with a particle size greater than the particle size threshold are particles with larger particle sizes, and particles with a particle size less than the particle size threshold are particles with smaller particle sizes. The particle size threshold can be controlled by wind force, so as to realize the screening of particles according to particle size, and finally discharge the screened particles through the discharge port 2130. Among them, the air inlet 2110 supplies the air screen airflow to enter the air selection channel 2500.

[0107] Through this embodiment, it is possible to achieve air separation of particulate matter according to particle size.

[0108] In an exemplary embodiment, Figure 4 and Figure 5 As shown, the air selection device 2000 further includes an air permeable screen 2200, which is arranged in the air selection channel 2500 and divides the air selection channel 2500 into a material area 2510 and an air inlet area 2520. The return air port 2120 is arranged at the top of the material area 2510, the discharge port 2130 is arranged at the bottom of the material area 2510, and the air inlet 2110 is arranged at the bottom of the air inlet area 2520. Thus, the material discharged from the discharge port 1131 enters the material area 2510 through the return air port 2120, the air screen air flows through the air inlet 2110 into the air inlet area 2520 and passes through the air permeable screen 2200 to carry part of the particles in the material area 2510 back to the annular rotating chamber 1420 through the return air port 2120 and the discharge port 1131, and the remaining particles in the material area 2510 are discharged through the discharge port 2130.

[0109] In one example, the particles discharged from the discharge port 1131 can be spread on the surface of the air permeable screen 2200 facing the material area 2510 .

[0110] In one example, the air permeable screen 2200 is a mesh plate or a perforated plate.

[0111] The material discharged from the discharge port 1131 enters the material area 2510 through the return air port 2120, slides flat on the surface of the air permeable screen 2200, and the wind screen airflow enters the air inlet area 2520 through the air inlet 2110 and passes through the air permeable screen 2200 to carry some of the particles in the material area 2510 and flow back into the annular rotating chamber 1420 through the return air port 2120 and the discharge port 1131, and the remaining particles in the material area 2510 are discharged through the discharge port 2130; wherein, the particle size of the refluxed particles is smaller than the particle size threshold, and the particle size of the discharged particles is larger than the particle size threshold.

[0112] Since particles with a size smaller than the particle size threshold can move upward with the airflow of the wind screen, the particle size of the returned particles is smaller than the particle size threshold. Since particles with a size larger than the particle size threshold can move downward due to gravity, the particle size of the discharged particles is larger than the particle size threshold.

[0113] Through this embodiment, the particles are screened according to their particle sizes by utilizing the wind force against the direction of gravity and the gravity of the particles, and the screened particles are discharged through the discharge port 2130 .

[0114] In an exemplary embodiment, Figure 1 As shown, the air selection channel 2500 is tilted relative to the central axis of the annular rotating chamber 1420 .

[0115] Through this embodiment, the air selection channel 2500 is inclined relative to the central axis of the annular rotating chamber 1420, so that gravity can be used for air selection.

[0116] In addition, such a configuration facilitates the separation of the air inlet 2110 and the discharge port 2130 of the air selection channel 2500, thereby preventing the screened particles from being discharged from the air inlet 2110, which would affect the smooth input of the airflow and the smooth discharge of the particles. This is beneficial to the reliable input of the airflow in the air selection channel 2500 and the smooth discharge of the particles.

[0117] In an exemplary embodiment, Figure 2 and Figure 4 As shown, the air selection device 2000 further includes: an air volume regulating device 2300, which is disposed at the air inlet 2110 and is configured to regulate the air volume of the air inlet 2110 to regulate the particle size of the screened particles.

[0118] The greater the air volume and the greater the wind force, the more particles will flow back into the annular rotating chamber 1420, and the greater the average particle size threshold of the particles screened out and discharged.

[0119] On the contrary, the smaller the air volume and the smaller the wind force, the fewer particles will flow back into the annular rotating chamber 1420, and the smaller the average particle size threshold of the particles screened out and discharged will be.

[0120] In this way, by controlling the air volume of the air inlet 2110 through the air volume regulating device 2300, the adjustment of the air selection particle size threshold can be achieved, and the user can make a reasonable choice according to his or her own needs, which is conducive to meeting the user's usage requirements.

[0121] In an exemplary embodiment, the air volume adjusting device 2300 includes an air flow driving member, which is configured to adjust the air volume of the air inlet 2110 by adjusting the working power; or, the air volume adjusting device 2300 includes an air volume adjusting valve, which is configured to adjust the air volume of the air inlet 2110 by adjusting the opening of the air inlet 2110.

[0122] In one example, the air flow driving component is a variable frequency fan, which adjusts the working power by frequency conversion to adjust the air volume of the air inlet 2110.

[0123] In one example, the air volume regulating valve is an electric valve plate, which adjusts the air volume of the air inlet 2110 by adjusting the opening of the air inlet 2110 .

[0124] In an exemplary embodiment, the air inlet 2110 is configured to be connected to an airflow driving member so as to utilize the airflow driving member to supply air into the air selection channel 2500. The air volume of the air inlet can be adjusted by controlling the working parameters such as the power / frequency of the airflow driving member, thereby facilitating online automatic control. Alternatively, the air inlet 2110 is configured to be connected to the air outlet of the dusty airflow channel 1400 through a pipeline so as to utilize the exhaust gas discharged from the dusty airflow channel 1400 to supply air into the air selection channel 2500. Alternatively, the air inlet 2110 is connected to the outside atmosphere and is configured to draw air into the air selection channel 2500 under the action of the negative pressure in the dusty airflow channel 1400.

[0125] In one example, the air inlet 2110 is arranged to be connected to the air outlet of the dusty air flow channel 1400 through a pipeline, so as to use the tail gas discharged from the dusty air flow channel 1400 to send air into the air selection channel 2500, which can not only realize the reuse of the tail gas discharged from the dusty air flow channel 1400, but also avoid the use of air flow driving parts to further save energy consumption. In this case, an electric valve can be set at the air inlet 2110 to control the air volume of the air inlet, thereby realizing online automatic control.

[0126] In one example, the air inlet 2110 is connected to the outside atmosphere and is configured to draw air into the air selection channel 2500 under the negative pressure in the dust-laden air flow channel 1400, thereby avoiding the use of air flow drive components to further save energy. In this case, an electric valve can be provided at the air inlet 2110 to control the air volume of the air inlet, thereby realizing online automatic control.

[0127] In an exemplary embodiment, Figure 3 As shown, the air selection device 2000 further includes a material guide assembly 2400. The material guide assembly 2400 is connected to the air inlet device 1000. A material guide channel 2430 communicating with the material outlet 1131 is provided in the material guide assembly 2400, and the air return port 2120 is communicated with the material outlet 1131 through the material guide channel 2430.

[0128] Through this embodiment, the material guide channel 2430 of the material guide component 2400 realizes the connection between the discharge port 1131 and the return air port 2120, so that the particles centrifuged in the annular rotating chamber 1420 are discharged into the air separation device 2000 through the discharge port 1131 and the return air port 2120, and the particles in the air separation device 2000 that are smaller than the particle size threshold are returned to the annular rotating chamber 1420 through the return air port 2120 and the discharge port 1131.

[0129] In an exemplary embodiment, Figure 1 and Figure 3 As shown, the material guiding assembly 2400 includes a material guiding shell 2410 and a connecting pipe 2420 .

[0130] The material guide shell 2410 is connected to the air inlet device 1000 and covers the material outlet 1131. The material guide shell 2410 and the air inlet device 1000 enclose a material guide slot 2431, and a material outlet is provided at the bottom of the material guide slot 2431. One end of the connecting pipe 2420 is connected to the material outlet, and the other end is connected to the return air port 2120. The internal space of the material guide slot 2431 and the connecting pipe 2420 forms a material guide channel 2430.

[0131] In one example, the top end of the connecting tube 2420 is connected to the material outlet, and the bottom end of the connecting tube 2420 is connected to the air return port 2120 .

[0132] In one example, the connecting pipe 2420 is tilted relative to the central axis of the annular rotating chamber 1420 .

[0133] 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 in a spiral pattern along the circumference and axial direction of the annular rotating chamber 1420; the shape of the material guide shell 2410 is adapted to the shape of the discharge port 1131.

[0134] 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 guide shell may be a vertical structure.

[0135] When the discharge port 1131 includes a plurality of discharge holes 1132 that are arranged in a spiral pattern along the circumferential direction and axial direction of the annular rotating chamber 1420 , the guide shell may be a spiral structure.

[0136] In an exemplary embodiment, the number of the discharge ports 1131 , the number of the wind screen guide shells 2100 , and the number of the material guide assemblies 2400 are equal and correspond one to one.

[0137] The number of discharge ports 1131 corresponds one-to-one to the number of wind screen guide shells 2100, ensuring that the particles leaving the annular rotating chamber 1420 through the discharge ports 1131 can enter the wind screen guide shells 2100; the number of wind screen guide shells 2100 is equal to and corresponds one-to-one to the number of material guide components 2400, ensuring that the particles entering the wind screen guide shells 2100 can enter the material guide components 2400 and finally enter the air selection device 2000.

[0138] This implementation ensures that the particles leaving the annular rotating chamber 1420 through the discharge port 1131 can enter the air separation device 2000 .

[0139] In an exemplary embodiment, Figure 1 As shown, the air selection device 2000 also includes a collecting box 2600 and an air-locking discharger 2700 .

[0140] The inlet of the material collecting box 2600 is communicated with the discharge port 2130 of at least one wind screen guide shell 2100. The air lock discharger 2700 is arranged at the discharge port of the material collecting box 2600.

[0141] In one example, the air-locking discharger 2700 disposed at the discharge port of the collecting box 2600 is used to ensure the airtightness of the air selector 100 .

[0142] In one example, when the air separation device 2000 includes multiple aggregate boxes 2600, the particle size threshold of the wind screen guide shell 2100 connected to the same aggregate box 2600 can be set to the same value, and the particle size threshold of the wind screen guide shell 2100 connected to different aggregate boxes 2600 can be set to different values, thereby achieving graded screening of particulate matter by particle size.

[0143] Specifically, for example, the air selection device 2000 includes two collection boxes 2600, namely a first collection box 2600 and a second collection box 2600. The particle size threshold of the wind screen guide shell 2100 connected to the first collection box 2600 is set to the first particle size threshold; and the particle size threshold of the wind screen guide shell 2100 connected to the second collection box 2600 is set to the second particle size threshold. Then, the particle size of the particles in the first collection box 2600 is greater than the first particle size threshold, and the particle size of the particles in the second collection box 2600 is greater than the second particle size threshold. Exemplarily, the second particle size threshold is greater than the first particle size threshold, so as to achieve graded screening of particles according to particle size.

[0144] For another example, the air selection device 2000 includes three collection boxes 2600, namely the first collection box 2600, the second collection box 2600 and the third collection box 2600. The particle size threshold of the wind screen guide shell 2100 connected to the first collection box 2600 is set to the first particle size threshold; the particle size threshold of the wind screen guide shell 2100 connected to the second collection box 2600 is set to the second particle size threshold; the particle size threshold of the wind screen guide shell 2100 connected to the third collection box 2600 is set to the third particle size threshold. Then, the particle size of the particles in the first collection box 2600 is greater than the first particle size threshold, the particle size of the particles in the second collection box 2600 is greater than the second particle size threshold, and the particle size of the particles in the third collection box 2600 is greater than the third particle size threshold. Exemplarily, 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, so as to achieve graded screening of particles according to particle size.

[0145] In an exemplary embodiment, the air inlet of the dusty air flow channel 1400 is configured to be connected to a disperser; or the air inlet of the dusty air flow channel 1400 is configured to be connected to the discharge port 1131 of the grinder, and the discharge port 2130 of the air selection channel 2500 is configured to be connected to the feed port of the grinder; or the air selector 100 is configured as a primary dust collector, and the air outlet of the dusty air flow channel 1400 is configured to be connected to a secondary dust collector.

[0146] Some gypsum powder manufacturers use cyclone dust collectors for separation. However, cyclone dust collectors have high wind speed, high resistance, high power consumption, and uncontrollable particle size. Impurities and fine powder are discharged from the system at the same time, resulting in increased energy consumption and serious material loss. When the air inlet of the dust-containing air flow channel 1400 is set to be connected to a pulverizer, the air separator 100 in the embodiment of the present application can replace the cyclone dust collector used for separation in the gypsum powder production process.

[0147] In other dry fine grinding industries, there are often high requirements for grinding fineness. The grinding equipment itself cannot accurately control the grinding efficiency and the discharge particle size, and it is necessary to add a powder selection device at the mill outlet. Commonly used powder selection equipment, such as a cyclone dust collector or a powder selector, has large resistance, large power consumption, and is difficult to adjust the particle size of the selected powder. When the air inlet of the dust-containing air flow channel 1400 is set to be connected to the discharge port 1131 of the mill, and the discharge port 2130 of the air selection channel 2500 is set to be connected to the feed port of the mill, the air selector 100 in the embodiment of the present application can replace the cyclone dust collector or powder selector used in the powder selection process in other dry fine grinding industries.

[0148] In terms of dust removal, currently high-dust gas dust removal is a combination of a cyclone dust collector and an electrostatic precipitator or a bag dust collector. First, the cyclone dust collector is used for primary dust removal to reduce the dust concentration in the airflow, and then the electrostatic precipitator or bag dust collector is used for secondary dust removal to reduce the area of ​​the electrostatic precipitator or bag dust collector and reduce the concentration of dust discharged externally. However, the cyclone dust collector has the disadvantages of high wind speed, large equipment flow resistance, and high power consumption. When the air selector 100 is set as a primary dust collector and the air outlet of the dust-containing air flow channel 1400 is set to be connected to the secondary dust collector, the air selector 100 in the embodiment of the present application can replace the cyclone dust collector used as the primary dust removal in the dust collector.

[0149] Through this embodiment, when the air inlet of the dust-containing air flow channel 1400 is set to be connected to the scattering machine, the air selector 100 in the embodiment of the present application can replace the cyclone dust collector used for separation in the gypsum powder production process. The air selector 100 can separate large-particle impurities such as gravel, sand, and coal particles from fine powder in the gypsum powder calcining industry, which is conducive to preventing these large-particle impurities from entering the downstream transportation, dust removal, and boiling calcining equipment along with the air flow and fine powder, and thus can protect the downstream air flow pipeline, transportation equipment, and dust removal equipment. There is no need to stop the fluidized bed regularly to tidy up the fluidized bed, and the serious material loss caused by the use of a cyclone dust collector is avoided. In addition, the air selector 100 of the embodiment of the present application can also be used in the powder selection process in other dry fine grinding industries or as a primary dust removal device in the dust removal system, and can realize the air selection of particles according to the particle size. At the same time, since the dust-containing air flow channel 1400 of the air selector 100 of the present application extends in the vertical direction as a whole, the resistance is small and the power consumption is small. Embodiment 1

[0150] like Figures 1 to 4As shown, the dusty airflow enters the dusty airflow channel 1400 defined by the housing 1100 through the air inlet connecting pipe 1110, and first flows through the rectifying channel 1410 defined by the air inlet shell of the dusty airflow channel 1400, and the air inlet shell includes the air inlet connecting pipe 1110 and the rectifying shell 1120 connected sequentially from bottom to top. In the rectifying channel 1410, the dusty airflow is rectified and stabilized, and an air inlet guide portion 1221 of the air inlet guide body 1220 is provided at the end of the rectifying channel 1410, and the dusty airflow is introduced by the air inlet guide portion 1221 into the annular rotating chamber 1420 mainly defined by the middle guide portion 1222 of the air inlet guide body 1220 and the middle shell 1130 of the housing 1100.

[0151] In the annular rotating chamber 1420, due to the action of centrifugal force, the particulate matter in the dust-laden airflow is thrown out through the discharge port 1131 of the intermediate shell 1130 and enters the air separation device 2000, and the remaining dust-laden airflow leaves the annular rotating chamber 1420 and moves upward into the confluence channel 1430 defined by the air outlet shell. The air outlet shell includes a confluence shell 1140 and an air outlet connecting pipe 1150 which are sequentially connected from bottom to top, and is finally discharged from the air separator 100 through the air outlet connecting pipe 1150.

[0152] The particles entering the air selection device 2000 are discharged from the discharge port 2130 if they are larger than the particle size threshold, and are returned to the annular rotating chamber 1420 from the return air port 2120 through the discharge port 1131. The particle size threshold can be adjusted by adjusting the air volume adjusting device 2300 to adjust the air volume.

[0153] Specifically, the particles entering the air separation device 2000 first enter the material guide channel 2430 of the material guide assembly 2400, which includes a material guide groove 2431 defined by the material guide shell 2410 and the space within the connecting pipe 2420, and then enter the wind screen guide shell 2100 through the return air port 2120.

[0154] Among the particles entering the wind screen guide shell 2100, the particles larger than the particle size threshold are discharged from the discharge port 2130 at the bottom of the wind screen guide shell 2100, and the particles smaller than the particle size threshold flow back to the return air port 2120 through the guide channel 2430 and the discharge port 1131 and finally return to the annular rotating chamber 1420.

[0155] The air selector 100 thus selects particles with a particle size greater than the particle size threshold and discharges them from the discharge port 2130 . Embodiment 2

[0156] The air selection device 2000 further includes: a material collection box 2600, the inlet of which is connected to the discharge port 2130 of at least one air screen guide shell 2100; and an air lock discharger 2700, which is arranged at the discharge port of the material collection box 2600. The air lock discharger 2700, which is arranged at the discharge port of the material collection box 2600, is used to ensure the airtightness of the air selector 100.

[0157] When the air selection device 2000 includes multiple aggregate boxes 2600, the particle size threshold of the wind screen guide shell 2100 connected to the same aggregate box 2600 can be set to the same value, and the particle size threshold of the wind screen guide shell 2100 connected to different aggregate boxes 2600 can be set to different values, thereby realizing the graded screening of particulate matter according to particle size.

[0158] In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", "'mouth'-shaped structure" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred structure has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0159] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0160] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be defined by the attached claims.

Claims

1. A wind selector, characterized in that: include: An air inlet device, wherein a dust-containing airflow channel is provided in the air inlet device, and 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 particles 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 particles are 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, 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 cavity 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 wind selection device also includes: 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 air selector according to any one of claims 1 to 6, characterized in that: The wind selection device also includes: 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, characterized in that: 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 air selector according to any one of claims 1 to 6, characterized in that: The wind selection device also includes: 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.

Images