Adjustable light / dark separator

Abstract

The present invention discloses an adjustable thick-thin separator, which includes: a curved pipe body, a flow guide assembly, a separation assembly, and a concentration assembly. The flow guide assembly includes a first flow guide plate and a second flow guide plate. The flow guide assembly defines a collection channel, and the cross-sectional area of ​​the collection channel gradually decreases from upstream to downstream. The separation assembly includes a rotating shaft and a partition plate. The partition plate defines a dense phase branch channel, and the dense phase branch channel is connected to the collection channel. The concentration assembly is connected to the curved pipe body. The concentration assembly has a concentration channel, an air chamber, and a vent. The concentration channel is connected to the dense phase branch channel. A plurality of filter holes are provided on the peripheral wall of the concentration channel. The concentration channel is connected to the air chamber through the filter holes, and the vent is connected to the air chamber. The flow guide assembly serves to enhance powder enrichment. The partition plate is used to adjust the flow rate and solid-gas ratio of the dense phase branch flow. The concentration assembly fine-tunes the concentration of the dense phase branch flow, further enhancing the concentration effect of the separator.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, in particular to an adjustable thick-lean separator. Background Art

[0002] Pneumatic conveying is a common method of conveying powders in industry. Usually in the field of combustion, increasing the concentration of powders (such as coal powder) is beneficial to the ignition and stable combustion of burners, while the solid-gas content in the conveying air of traditional power plant boilers is relatively low. In related technologies, the inertia of powder is utilized to enrich the powder on the outside of the elbow through an elbow-type separator, and the high and low concentration two-phase flows are separated by a baffle, and the dense phase branch is connected to the burner to improve the combustion efficiency and stability of the burner. However, the powder enrichment area passing through the elbow is not concentrated enough, and the concentrations of the dense phase branch and the dilute phase branch after separation are fixed and cannot be adjusted. In addition, since the baffle used to separate the dense phase branch and the dilute phase branch is directly opposite to the incoming flow direction of the gas-solid two-phase flow, there are problems of wear and powder deposition. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides an adjustable thick-thin separator, which has the characteristics of good thickening effect and precise control of dense phase side air flow and powder flow.

[0005] The adjustable thick-thin separator of the embodiment of the present invention comprises: a curved pipe body, a flow guide assembly, a separation assembly and a concentration assembly, the flow guide assembly comprises a first flow guide plate and a second flow guide plate, the first flow guide plate and the second flow guide plate are both arranged on the inner pipe wall of the curved pipe body located on the outside, the first flow guide plate comprises a first tapered section and a first straight section connected, the second flow guide plate comprises a second tapered section and a second straight section connected, the first tapered section and the second tapered section jointly define a collecting channel, the cross-sectional area of ​​the collecting channel gradually decreases in the direction from upstream to downstream, the separation assembly comprises a rotating shaft and a separation assembly A partition plate is rotatably arranged between the first straight section and the second straight section via the rotating shaft. The partition plate, the first straight section, the second straight section and the inner tube wall of the elbow body jointly define a dense phase branch channel. The dense phase branch channel is connected to the collecting channel. The concentration component is connected to the elbow body. The concentration component has a concentration channel, an air chamber and an air vent. The concentration channel is connected to the dense phase branch channel. A plurality of filter holes are provided on the peripheral wall of the concentration channel. The concentration channel is connected to the air chamber through the filter holes, and the air vent is connected to the air chamber.

[0006] The adjustable thick-lean separator of the present invention utilizes the flow-guiding and converging action of the flow-guiding assembly to achieve a more concentrated powder-enriched area at the separator's outlet. Rotating the partition plate adjusts the flow rate and solid-to-gas ratio of the dense-phase branch, thereby resolving the issue of fixed concentrations of the dense-phase and dilute-phase branches after separation in related-art separators. Furthermore, the concentration-enhancing assembly fine-tunes the concentration of the dense-phase branch, further enhancing the concentration-enhancing effect of the separator of the present invention.

[0007] In some embodiments, the first guide plate and the second guide plate are symmetrically arranged on both sides of the central axis of the elbow body in the first direction.

[0008] In some embodiments, the elbow body includes a connected elbow portion and a straight portion, the first tapered section and the second tapered section are both located in the elbow portion, and the first straight section and the second straight section are both located in the straight portion.

[0009] In some embodiments, the line connecting the upstream end of the bend and the center of the bend is L1, the line connecting the upstream end of the first tapered section and the center of the bend is L2, the angle between L1 and L2 is a, and 20°<a<55°.

[0010] In some embodiments, the downstream end of the first tapered section is flush with the downstream end of the curved pipe portion, the upstream end of the first straight section is flush with the upstream end of the straight pipe portion, and the downstream end of the first straight section is flush with the downstream end of the straight pipe portion.

[0011] In some embodiments, a first blowing channel is provided in the partition plate and extends along the length direction of the partition plate. The first blowing channel has a first air inlet end and a first air outlet end. The first air outlet end is located on the end face of the partition plate close to the collecting channel. A first diverter block is provided at the first air outlet end. The first diverter block divides the first air outlet end into a first nozzle and a second nozzle. The extension direction of the first nozzle is parallel to the extension direction of the first blowing channel, and the extension direction of the second nozzle has an angle with the extension direction of the first blowing channel.

[0012] In some embodiments, a second blowing channel extending along the length direction of the partition plate is further provided in the partition plate, and the second blowing channel has a second air inlet end and a second air outlet end, and the second air outlet end is located on the end face of the partition plate close to the collecting channel, and a second diverter block is provided at the second air outlet end, and the second diverter block and the first diverter block are relatively distributed along the thickness direction of the partition plate, and the second diverter block divides the second air outlet end into a third nozzle and a fourth nozzle, and the extension direction of the third nozzle is parallel to the extension direction of the second blowing channel, and the extension direction of the fourth nozzle has an angle with the extension direction of the second blowing channel.

[0013] In some embodiments, a cross-sectional area of ​​the first nozzle is smaller than a cross-sectional area of ​​the second nozzle, and a cross-sectional area of ​​the third nozzle is smaller than a cross-sectional area of ​​the fourth nozzle.

[0014] In some embodiments, an air injection hole is provided on the rotating shaft, and the first air inlet end and the second air inlet end are respectively connected to the air injection hole. The separation component also includes an air circuit switching switch, which is rotatably provided in the air injection hole. The air circuit switching switch is used to control the connection and disconnection between the first air inlet end or the second air inlet end and the air injection hole.

[0015] In some embodiments, a limit plate is further included. The limit plate is provided between the first straight section and the second straight section. The limit plate is located outside the dense phase branch channel. The limit plate is used to limit the rotation angle of the partition plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a separator outlet in the related art.

[0017] Figure 2 Schematic diagram of an adjustable thick-thin separator outlet according to an embodiment of the present invention.

[0018] Figure 3 1 is a first schematic diagram of an adjustable thick-thin separator according to an embodiment of the present invention.

[0019] Figure 4 2 is a second schematic diagram of the adjustable thick-thin separator according to an embodiment of the present invention.

[0020] Figure 5 It is a cross-sectional schematic diagram of an adjustable thick-thin separator according to an embodiment of the present invention.

[0021] Figure 6 Schematic diagram of the flow guide assembly and separation assembly of the adjustable thick-thin separator according to an embodiment of the present invention.

[0022] Figure 7Schematic diagram of a separation component of an adjustable thick-thin separator according to an embodiment of the present invention.

[0023] Figure 8 Schematic diagram of airflow distribution when the first air blowing channel of the adjustable thick-thin separator is opened in an embodiment of the present invention.

[0024] Figure 9 yes Figure 8 Enlarged schematic diagram of part A.

[0025] Reference numerals:

[0026] Bend pipe body 1, bend pipe part 11, straight pipe part 12,

[0027] The guide assembly 2, the first guide plate 21, the first tapered section 211, the first straight section 212, the second guide plate 22, the second tapered section 221, the second straight section 222, the converging channel 201,

[0028] Separation component 3, rotating shaft 31, air injection hole 311, partition plate 32, first air blowing channel 321, first nozzle 3211, second nozzle 3212, first diverter block 322, second air blowing channel 323, third nozzle 3231, fourth nozzle 3232, second diverter block 324, air path switch 33, dense phase branch channel 301,

[0029] Concentration component 4, concentration channel 401, air chamber 402, vent hole 403,

[0030] Limiting plate 5. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] The adjustable dark / light separator according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0033] like Figures 3 to 7 As shown, the adjustable thick-thin separator of the embodiment of the present invention includes: a curved pipe body 1, a flow guide component 2, a separation component 3 and a thickening component 4.

[0034] The guide assembly 2 includes a first guide plate 21 and a second guide plate 22. The first guide plate 21 and the second guide plate 22 are both arranged on the inner tube wall of the elbow body 1 located on the outside. The first guide plate 21 includes a connected first tapered section 211 and a first straight section 212. The second guide plate 22 includes a connected second tapered section 221 and a second straight section 222. The first tapered section 211 and the second tapered section 221 jointly define a converging channel 201. The cross-sectional area of ​​the converging channel 201 gradually decreases in the direction from upstream to downstream.

[0035] The side of the elbow body 1 closest to its center is the inner side, and the side of the elbow body 1 away from its center is the outer side. Upstream and downstream are defined based on the direction of the airflow. The gas-solid two-phase flow enters the elbow body 1 from its upstream end. Powders accumulate on the outer side of the elbow body 1 due to inertia, then enter the converging channel 201 and converge under the guidance of the first and second tapered sections 211, 221.

[0036] Optionally, the first tapered section 211 and the second tapered section 221 gradually approach each other along the airflow direction, so that the cross-sectional area of ​​the converging channel 201 gradually decreases from upstream to downstream, playing a role in guiding and converging the airflow. The first straight section 212 and the second straight section 222 are arranged parallel to each other.

[0037] The separation assembly 3 includes a rotating shaft 31 and a partition plate 32. The partition plate 32 is rotatably arranged between the first straight section 212 and the second straight section 222 via the rotating shaft 31. The partition plate 32, the first straight section 212, the second straight section 222 and the inner tube wall of the elbow body 1 jointly define a dense phase branch channel 301, and the dense phase branch channel 301 is connected to the collecting channel 201.

[0038] Optionally, the rotating shaft 31 is arranged perpendicular to the first straight section 212 and the second straight section 222, one end of the rotating shaft 31 is rotatably connected to the first straight section 212, and the other end of the rotating shaft 31 is rotatably connected to the second straight section 222. Figure 7 The rear end of the middle partition plate 32 is connected to the rotating shaft 31, thereby causing the partition plate 32 to rotate about the rotating shaft 31. The end faces of the partition plate 32 in the width direction are respectively aligned with the end faces of the first straight section 212 and the end faces of the second straight section 222, so that the partition plate 32 separates the channel defined by the first straight section 212 and the second straight section 222 into a dense phase branch channel 301 and a dilute phase branch channel. In other words, the channel outside the partition plate 32 is the dense phase branch channel 301, and the channel inside the partition plate 32 is the dilute phase branch channel.

[0039] It is understood that when the partition plate 32 is rotated outward (eg Figure 5When the middle partition plate 32 rotates upward, the cross-sectional area of ​​the upstream inlet of the dense-phase branch channel 301 decreases. Since the powder concentration is higher on the inside and outside of the elbow body 1 than on the inside, the flow rate entering the dense-phase branch channel 301 decreases, and the dense-phase branch solid-gas ratio increases. Similarly, when the partition plate 32 rotates inward, the cross-sectional area of ​​the upstream inlet of the dense-phase branch channel 301 increases, the flow rate entering the dense-phase branch channel 301 increases, and the dense-phase branch solid-gas ratio decreases.

[0040] Furthermore, the concentration component 4 is connected to the elbow body 1, and the concentration component 4 has a concentration channel 401, an air chamber 402 and an air vent 403. The concentration channel 401 is connected to the dense phase branch channel 301. A plurality of filter holes are provided on the peripheral wall of the concentration channel 401. The concentration channel 401 is connected to the air chamber 402 through the filter holes, and the air vent 403 is connected to the air chamber 402.

[0041] Alternatively, as Figure 5 As shown, the concentrated phase channel 401 is located downstream of the dense phase tributary flow channel 301. The upper sidewall of the concentrated phase channel 401 is provided with multiple filter holes (or the upper sidewall of the concentrated phase channel 401 is made of a wear-resistant porous filter material such as metal or ceramic). After the dense phase tributary flow enters the concentrated phase channel 401, the airflow can pass through the filter holes into the air chamber 402, and the powder is trapped by the filter holes on the wall of the concentrated phase channel 401. The vent hole 403 can be connected to an external variable frequency fan and anemometer equipment to realize the function of exhausting and replenishing air in the concentrated phase channel 401.

[0042] It is understood that when the solid-to-gas ratio of the concentrated phase entering the concentration channel 401 is lower than the required operating conditions, air is drawn outward through the air vent 403 by the fan until the two-phase flow concentration at the outlet of the concentration channel 401 reaches the required operating conditions. At this point, the pressure in the air chamber 402 is low, and powder will gradually accumulate on the inner wall of the concentration channel 401. To remove accumulated powder and ensure smooth filtration, the inner wall of the concentration channel 401 can be regularly cleaned using methods such as periodic vibration, ultrasonic waves, and compressed air injection.

[0043] Similarly, when the solid-to-gas ratio of the dense phase entering the concentration channel 401 falls below the required operating conditions, the direction of the fan connected to the vent 403 is reversed to replenish airflow into the concentration channel 401 until the two-phase flow concentration at the outlet of the concentration channel 401 reaches the required operating conditions. At this point, powder will not accumulate on the inner wall of the concentration channel 401, so regular cleaning is not required.

[0044] Specifically, if Figure 2 As shown in FIG. 1 , the dense phase region C2 and the dilute phase region D2 of the outlet of the adjustable thick-thin separator of the embodiment of the present invention are shown in FIG. Figure 1As shown, the dense phase region C1 and the dilute phase region D1 at the separator outlet. The area of ​​C2 is smaller than that of C1. Therefore, the powder enrichment region at the separator outlet of the embodiment of the present invention is relatively concentrated.

[0045] Therefore, the flow-guiding and converging action of the flow-guiding assembly 2 results in a more concentrated powder-enriched area at the separator outlet of the present invention. Rotating the partition plate 32 adjusts the flow rate and solid-to-gas ratio of the dense-phase branch stream, thereby resolving the issue of fixed concentrations of the dense-phase and dilute-phase branches after separation in conventional separators. Furthermore, the concentration of the dense-phase branch stream is fine-tuned by the concentration-enhancing assembly 4, further enhancing the concentration-enhancing effect of the separator of the present invention.

[0046] In some embodiments, as Figure 3 and Figure 4 As shown, the first guide plate 21 and the second guide plate 22 are symmetrically arranged on both sides of the central axis of the elbow body 1 in the first direction.

[0047] The first direction refers to Figure 4 The first guide plate 21 and the second guide plate 22 are symmetrically arranged, with the upstream end of the first guide plate 21 and the upstream end of the second guide plate 22 flush with each other, and the downstream end of the first guide plate 21 and the downstream end of the second guide plate 22 flush with each other.

[0048] In some embodiments, as Figures 3 to 6 As shown, the elbow body 1 includes a connected elbow portion 11 and a straight pipe portion 12 , the first tapered section 211 and the second tapered section 221 are both located in the elbow portion 11 , and the first straight section 212 and the second straight section 222 are both located in the straight pipe portion 12 .

[0049] Specifically, the downstream end of the first tapered section 211 is flush with the downstream end of the curved pipe portion 11, the upstream end of the first straight section 212 is flush with the upstream end of the straight pipe portion 12, and the downstream end of the first straight section 212 is flush with the downstream end of the straight pipe portion 12. Furthermore, the downstream end of the second tapered section 221 is flush with the downstream end of the curved pipe portion 11, the upstream end of the second straight section 222 is flush with the upstream end of the straight pipe portion 12, and the downstream end of the second straight section 222 is flush with the downstream end of the straight pipe portion 12.

[0050] In some embodiments, as Figure 5 As shown, the line connecting the upstream end of the bend portion 11 and the center of the bend portion 11 is L1, the line connecting the upstream end of the first tapered section 211 and the center of the bend portion 11 is L2, the angle between L1 and L2 is a, and 20°<a<55°.

[0051] Specifically, a is 30°. It is understood that when the separator of the embodiment of the present invention is in operation, the gas-solid two-phase flow enters the separator from the lower inlet, and when passing through the bend 11, the powder is enriched to the outside of the bend 11 under the action of inertia. When entering the bend 11 at about 30°, the dense phase powder on the outside of the bend 11 enters the collecting channel 201. Under the guidance of the first tapered section 211 and the second tapered section 221, the dense phase powder on the outside of the bend 11 gradually converges to the center, forming Figure 2 The outlet dense phase enrichment area.

[0052] In some embodiments, as Figures 3 to 9 As shown, the partition plate 32 is provided with a Figure 7 The first blowing channel 321 extends in the front-to-back direction. The first blowing channel 321 has a first air inlet end and a first air outlet end. The first air outlet end is located at the end surface of the partition plate 32 close to the collecting channel 201 (such as Figure 7 A first diverter block 322 is provided at the first air outlet end. The first diverter block 322 divides the first air outlet end into a first nozzle 3211 and a second nozzle 3212. The first nozzle 3211 extends in a direction parallel to the direction of the first air blowing channel 321. The second nozzle 3212 extends at an angle to the direction of the first air blowing channel 321. The cross-sectional area of ​​the first nozzle 3211 is smaller than that of the second nozzle 3212.

[0053] The partition plate 32 is further provided with a second blowing channel 323 extending along the length direction of the partition plate 32. The second blowing channel 323 has a second air inlet end and a second air outlet end. The second air outlet end is located on the end face of the partition plate 32 close to the collecting channel 201. A second diverter block 324 is provided at the second air outlet end. The second diverter block 324 and the first diverter block 322 are connected along the thickness direction of the partition plate 32 (such as Figure 7 The second flow divider 324 divides the second air outlet into a third nozzle 3231 and a fourth nozzle 3232. The third nozzle 3231 extends parallel to the second air blowing channel 323. The fourth nozzle 3232 extends at an angle to the second air blowing channel 323. The cross-sectional area of ​​the third nozzle 3231 is smaller than that of the fourth nozzle 3232.

[0054] Alternatively, as Figure 7As shown, the first blowing channel 321 is located above the second blowing channel 323. The cross-sections of the first diverter block 322 and the second diverter block 324 are both triangular. The first nozzle 3211 is located on the lower side of the first diverter block 322, and the second nozzle 3212 is located on the upper side of the first diverter block 322. The third nozzle 3231 is located on the upper side of the second diverter block 324, and the second nozzle 3212 is located on the lower side of the second diverter block 324.

[0055] It is understandable that if Figure 5 As shown, when the partition plate 32 rotates upward or downward at a large angle, the powder will accumulate on the windward side of the partition plate 32 due to inertia, which is not conducive to the stable operation of the separator.

[0056] For example, Figure 8 and Figure 9 As shown, when the partition plate 32 rotates downward, the first blowing channel 321 is ventilated, while the second blowing channel 323 is blocked. At this point, the jet airflow passes through the first blowing channel 321 and is split into two streams by the first diverter block 322. A larger stream is ejected diagonally upward, mixing with the airflow from the converging channel 201 to form a larger recirculation zone M. The other smaller stream is ejected parallel to the first blowing channel 321, forming a smaller recirculation zone N.

[0057] Therefore, the powder that would have been deposited on the partition plate 32 due to inertia will directly enter the center of the dense phase branch channel 301 under the suction action of the reflux zone M, thereby avoiding deposition, while the powder that would have directly hit the tip of the partition plate 32 will enter the dilute phase branch channel below under the action of the reflux zone N, thereby avoiding the wear of the partition plate 32 and the problem of ash blockage in the nozzle.

[0058] Similarly, when the partition plate 32 rotates upward, the second blowing channel 323 is ventilated, while the first blowing channel 321 is blocked. At this point, the jet airflow passes through the second blowing channel 323 and is split into two streams by the second diverter block 324. A larger stream is ejected diagonally downward, mixing with the airflow from the converging channel 201, forming a larger recirculation zone within the dilute phase branch channel. A smaller stream is ejected parallel to the second blowing channel 323, forming a smaller recirculation zone.

[0059] In some embodiments, as Figures 7 to 9 As shown, the rotating shaft 31 is provided with an air injection hole 311, and the first air inlet end and the second air inlet end are respectively connected to the air injection hole 311. The separation assembly 3 also includes an air circuit switch 33, which is rotatably disposed within the air injection hole 311 and is used to control the connection and disconnection between the first air inlet end or the second air inlet end and the air injection hole 311.

[0060] It is understandable that if Figure 7 As shown, the air injection hole 311 is connected to an external air source and serves as the main channel for the jet airflow. When the air path switch 33 is turned upward, the first air inlet is blocked, and the jet airflow enters the second blowing channel. When the air path switch 33 is turned downward, the second air inlet is blocked, and the jet airflow enters the first blowing channel.

[0061] In some embodiments, as Figures 3 to 9 As shown, it also includes a limit plate 5, which is arranged between the first straight section 212 and the second straight section 222. The limit plate 5 is located outside the dense phase branch channel 301 and is used to limit the rotation angle of the partition plate 32. For example, Figure 9 As shown, under the action of the limiting plate 5, the partition plate 32 rotates downward to the maximum angle.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0064] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0067] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. An adjustable thick and thin separator, characterized in that: include: elbow body; A flow guide assembly, the flow guide assembly including a first flow guide plate and a second flow guide plate, the first flow guide plate and the second flow guide plate are both provided on the inner tube wall of the elbow body located on the outside, the first flow guide plate including a first tapered section and a first straight section connected, the second flow guide plate including a second tapered section and a second straight section connected, the first tapered section and the second tapered section jointly defining a converging channel, the cross-sectional area of ​​the converging channel gradually decreasing in a direction from upstream to downstream; a separation assembly comprising a rotating shaft and a separation plate, wherein the separation plate is rotatably disposed between the first straight section and the second straight section via the rotating shaft, wherein the separation plate, the first straight section, the second straight section, and the inner tube wall of the elbow body collectively define a dense phase branch flow channel, wherein the dense phase branch flow channel is connected to the converging channel; A concentration assembly is connected to the elbow body, and has a concentration channel, an air chamber and a vent. The concentration channel is connected to the dense phase branch channel. A plurality of filter holes are provided on the peripheral wall of the concentration channel. The concentration channel is connected to the air chamber through the filter holes, and the vent is connected to the air chamber.

2. The adjustable thick and thin separator according to claim 1, characterized in that: The first guide plate and the second guide plate are symmetrically arranged on both sides of the central axis of the elbow body in a first direction.

3. The adjustable thick and thin separator according to claim 2, characterized in that: The curved pipe body includes a connected curved pipe portion and a straight pipe portion, the first tapered section and the second tapered section are both located in the curved pipe portion, and the first straight section and the second straight section are both located in the straight pipe portion.

4. The adjustable thick and thin separator according to claim 3, characterized in that: The line connecting the upstream end of the curved pipe portion and the center of the curved pipe portion is L1, the line connecting the upstream end of the first tapered section and the center of the curved pipe portion is L2, the angle between L1 and L2 is a, and 20°<a<55°.

5. The adjustable thick and thin separator according to claim 3, characterized in that: The downstream end of the first tapered section is flush with the downstream end of the curved pipe portion, the upstream end of the first straight section is flush with the upstream end of the straight pipe portion, and the downstream end of the first straight section is flush with the downstream end of the straight pipe portion.

6. The adjustable thick-thin separator according to claim 1, characterized in that: A first air blowing channel extending along the length direction of the partition plate is provided in the partition plate, the first air blowing channel having a first air inlet end and a first air outlet end, the first air outlet end is located on the end surface of the partition plate close to the collecting channel, a first diverter block is provided at the first air outlet end, the first diverter block divides the first air outlet end into a first nozzle and a second nozzle, an extension direction of the first nozzle is parallel to an extension direction of the first air blowing channel, and an angle is formed between an extension direction of the second nozzle and an extension direction of the first air blowing channel.

7. The adjustable thick-thin separator according to claim 6, characterized in that: The partition plate is also provided with a second air blowing channel extending along the length direction of the partition plate, the second air blowing channel having a second air inlet end and a second air outlet end, the second air outlet end is located on the end surface of the partition plate close to the collecting channel, and a second diverter block is provided at the second air outlet end, the second diverter block and the first diverter block are relatively distributed along the thickness direction of the partition plate, the second diverter block divides the second air outlet end into a third nozzle and a fourth nozzle, the extension direction of the third nozzle is parallel to the extension direction of the second air blowing channel, and the extension direction of the fourth nozzle has an angle with the extension direction of the second air blowing channel.

8. The adjustable thick-thin separator according to claim 7, characterized in that: A cross-sectional area of ​​the first nozzle is smaller than a cross-sectional area of ​​the second nozzle, and a cross-sectional area of ​​the third nozzle is smaller than a cross-sectional area of ​​the fourth nozzle.

9. The adjustable thick-thin separator according to claim 8, characterized in that: An air injection hole is provided on the rotating shaft, and the first air inlet end and the second air inlet end are respectively connected to the air injection hole. The separation component also includes an air circuit switching switch, which is rotatably arranged in the air injection hole. The air circuit switching switch is used to control the connection and disconnection of the first air inlet end or the second air inlet end and the air injection hole.

10. The adjustable thick and thin separator according to claim 1, characterized in that: It also includes a limit plate, which is arranged between the first straight section and the second straight section, and is located outside the dense phase branch channel. The limit plate is used to limit the rotation angle of the partition plate.

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