Dense-dilute separation device

Abstract

The invention discloses a thick-thin separation device which comprises a bent 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, a collection channel is defined by the flow guide assembly, and the cross sectional area of the collection channel is gradually reduced in the direction from the upstream to the downstream; the separation assembly comprises a rotating shaft and a partition plate, the partition plate defines a concentrated-phase branch channel, the concentrated-phase branch channel is communicated with the collection channel, the concentration assembly is connected with the elbow body, the concentration assembly is provided with a concentration channel, an air chamber and a vent hole, the concentration channel is communicated with the concentrated-phase branch channel, a plurality of filter holes are formed in the circumferential wall of the concentration channel, and the air chamber is communicated with the vent hole. The concentration channel is communicated with the air chamber through the filter holes, and the vent hole is communicated with the air chamber. And the flow guide assembly plays a role in enhancing powder enrichment. The partition plate is used for adjusting the flow and the solid-gas ratio of the concentrated-phase branch flow, the concentration of the concentrated-phase branch flow is finely adjusted through the concentration extraction assembly, and the concentration extraction effect of the separator is further enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burners, in particular to a concentration and dilution separation device. BACKGROUND

[0002] Pneumatic conveying is a common powder conveying method in industry, and is usually used in the field of combustion. Increasing the concentration of powder (such as coal powder) is beneficial to the ignition and stable combustion of the burner, while the solid-gas ratio in the conveying air of the traditional power plant boiler is low. In the related art, the inertia of the powder is utilized to make the powder concentrate on the outside of the elbow through an elbow separator, and a baffle is used to separate the high-concentration and low-concentration two-phase flow, so as to connect the concentrated phase branch stream to the burner to improve the combustion efficiency and stability of the burner. However, the powder concentration area after the elbow is not concentrated enough, and the concentration of the concentrated phase branch stream and the dilute phase branch stream after separation is fixed and cannot be adjusted. Moreover, since the baffle used to separate the concentrated phase branch stream and the dilute phase branch stream is directly opposite to the flow direction of the gas-solid two-phase flow, there are problems of wear and powder deposition. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in the related art.

[0004] To this end, an embodiment of the present application proposes a concentration and dilution separation device, which has the characteristics of good concentration effect and accurate control of the gas flow and powder flow on the concentrated phase side.

[0005] The concentration and dilution separation device of the present application comprises an elbow body, a flow guide assembly, a separation assembly and a concentration increasing assembly. The flow guide assembly comprises a first flow guide plate and a second flow guide plate, both of which are arranged on the inner pipe wall of the elbow body on the outside. The first flow guide plate comprises a first tapered section and a first straight section connected in series, and the second flow guide plate comprises a second tapered section and a second straight section connected in series. The first tapered section and the second tapered section jointly define a collection channel, the cross-sectional area of which gradually decreases in the direction from upstream to downstream. The separation assembly comprises a rotating shaft and a partition plate, which is rotatably arranged between the first straight section and the second straight section through the rotating shaft. The partition plate, the first straight section, the second straight section and the inner pipe wall of the elbow body jointly define a concentrated phase branch stream channel, which is connected with the collection channel. The concentration increasing assembly is connected with the elbow body. The concentration increasing assembly has a concentration increasing channel, an air chamber and an air vent. The concentration increasing channel is connected with the concentrated phase branch stream channel. A plurality of filter holes are arranged on the peripheral wall of the concentration increasing channel. The concentration increasing channel is connected with the air chamber through the filter holes. The air vent is connected with the air chamber.

[0006] The concentration and dilution separation device of the embodiment of the present application is under the effect of the flow guiding and collecting of the flow guiding assembly, so that the powder enrichment area of the outlet of the separator of the embodiment of the present application is relatively concentrated. The flow and solid-gas ratio of the concentrated phase branch flow are adjusted by rotating the separation plate, so as to solve the problem of fixed concentration of the concentrated phase branch flow and the dilute phase branch flow after the separation of the separator in the related art. In addition, the concentration of the concentrated phase branch flow is fine-tuned by the concentration assembly, so as to further strengthen the concentration effect of the separator of the embodiment of the present application.

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

[0008] In some embodiments, the elbow pipe body comprises an elbow pipe part and a straight pipe part connected in sequence, and the first tapered section and the second tapered section are located in the elbow pipe part, and the first straight section and the second straight section are located in the straight pipe part.

[0009] In some embodiments, the line connecting the upstream end of the elbow pipe part and the center of the elbow pipe part is L1, the line connecting the upstream end of the first tapered section and the center of the elbow pipe part is L2, the included 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 elbow pipe part, the upstream end of the first straight section is flush with the upstream end of the straight pipe part, and the downstream end of the first straight section is flush with the downstream end of the straight pipe part.

[0011] In some embodiments, the separation plate is provided with a first air blowing channel extending along the length direction of the separation plate, the first air 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 separation plate close to the collecting channel, the first air outlet end is provided with a first flow dividing block, the first flow dividing block divides the first air outlet end into a first air outlet and a second air outlet, the extension direction of the first air outlet is parallel to the extension direction of the first air blowing channel, and the extension direction of the second air outlet has an included angle with the extension direction of the first air blowing channel.

[0012] In some embodiments, the partition plate further comprises a second air blowing channel extending along the length direction of the partition plate, the second air blowing channel has 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 collection channel, the second air outlet end is provided with a second flow dividing block, the second flow dividing block and the first flow dividing block are oppositely distributed along the thickness direction of the partition plate, the second flow dividing block divides the second air outlet end into a third nozzle and a fourth nozzle, the extending direction of the third nozzle is parallel to the extending direction of the second air blowing channel, and the extending direction of the fourth nozzle has an included angle with the extending direction of the second air blowing channel.

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

[0014] In some embodiments, the rotating shaft is provided with an air injection hole, the first air inlet end and the second air inlet end are respectively connected with the air injection hole, and the separation assembly further comprises an air path switching switch, the air path switching switch is rotatably arranged in the air injection hole, and the air path switching switch is used for controlling the opening and closing of the first air inlet end or the second air inlet end and the air injection hole.

[0015] In some embodiments, a limiting plate is further arranged between the first flat section and the second flat section, the limiting plate is located outside the dense phase branch channel, and the limiting plate is used for limiting the rotation angle of the partition plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the outlet of a separator of related art.

[0017] Figure 2 is a schematic view of the outlet of a thick and thin separation device according to an embodiment of the present application.

[0018] Figure 3 is a first schematic view of a thick and thin separation device according to an embodiment of the present application.

[0019] Figure 4 is a second schematic view of a thick and thin separation device according to an embodiment of the present application.

[0020] Figure 5 is a sectional view of a thick and thin separation device according to an embodiment of the present application.

[0021] Figure 6 is a schematic view of a flow guide assembly and a separation assembly of a thick and thin separation device according to an embodiment of the present application.

[0022] Figure 7 is a schematic view of a separation assembly of a thick and thin separation device according to an embodiment of the present application.

[0023] Figure 8 is a schematic diagram of air flow distribution when a first air blowing passage of a thick and thin separation device of an embodiment of the present application is opened.

[0024] Figure 9 is Figure 8 is an enlarged schematic diagram of part A in FIG. 1.

[0025] Reference signs:

[0026] bent pipe body 1, bent pipe portion 11, straight pipe portion 12,

[0027] flow guide assembly 2, first flow guide plate 21, first tapered section 211, first flat section 212, second flow guide plate 22, second tapered section 221, second flat section 222, collection passage 201,

[0028] separation assembly 3, rotating shaft 31, air injection hole 311, partition plate 32, first air blowing passage 321, first air blowing outlet 3211, second air blowing outlet 3212, first flow dividing block 322, second air blowing passage 323, third air blowing outlet 3231, fourth air blowing outlet 3232, second flow dividing block 324, air path switching switch 33, thick phase branch passage 301,

[0029] concentration assembly 4, concentration passage 401, air chamber 402, air passage hole 403,

[0030] limiting plate 5. DETAILED DESCRIPTION

[0031] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0032] A thick and thin separation device of an embodiment of the present application is described below in conjunction with the accompanying drawings.

[0033] As shown in FIG. 1, a thick and thin separation device of an embodiment of the present application includes a bent pipe body 1, a flow guide assembly 2, a separation assembly 3 and a concentration assembly 4. Figures 3 to 7 The flow guide assembly 2 includes a first flow guide plate 21 and a second flow guide plate 22, both of which are arranged on an inner pipe wall of the bent pipe body 1 at an outer side. The first flow guide plate 21 includes a first tapered section 211 and a first flat section 212 connected to each other, and the second flow guide plate 22 includes a second tapered section 221 and a second flat section 222 connected to each other. The first tapered section 211 and the second tapered section 221 jointly define a collection passage 201, and the cross-sectional area of the collection passage 201 gradually decreases in a direction from upstream to downstream.

[0034] ​

[0035] Wherein, the side of the elbow body 1 close to its center is the inner side, and the side of the elbow body 1 far from its center is the outer side. According to the direction of the airflow, the upstream and downstream are defined. The gas-solid two-phase flow enters the elbow body 1 from the upstream end of the elbow body 1, and the powder is enriched to the outer side of the elbow body 1 under the action of inertia, and then enters the collection channel 201, and is collected under the flow guiding action of the first tapered section 211 and the second tapered section 221.

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

[0037] The separation assembly 3 comprises 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 through the rotating shaft 31, and the partition plate 32, the first straight section 212, the second straight section 222 and the inner wall of the elbow body 1 jointly define a dense phase branch channel 301, which is connected with the collection 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 with the first straight section 212, and the other end of the rotating shaft 31 is rotatably connected with the second straight section 222. The downstream end of the partition plate 32 (such as the rear end of the partition plate 32) is connected with the rotating shaft 31, so that the partition plate 32 rotates around the rotating shaft 31. The two end faces of the partition plate 32 in the width direction are respectively fitted with the end faces of the first straight section 212 and 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 the dense phase branch channel 301 and the dilute phase branch channel, that is, 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. Figure 7 It can be understood that when the partition plate 32 rotates outward (such as the partition plate 32 rotates upward), the cross-sectional area of the upstream end inlet of the dense phase branch channel 301 decreases, and since the powder concentration on the inner side of the elbow body 1 is higher than that on the outer side, 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 end 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.

[0039] Figure 5

[0040] ​​Further, the enrichment assembly 4 is connected with the elbow body 1, the enrichment assembly 4 has an enrichment channel 401, an air chamber 402 and a vent hole 403, the enrichment channel 401 is communicated with the dense phase branch channel 301, a plurality of filter holes are arranged on the peripheral wall of the enrichment channel 401, the enrichment channel 401 is communicated with the air chamber 402 through the filter holes, and the vent hole 403 is communicated with the air chamber 402.

[0041] Optionally, as shown in Figure 5 the enrichment channel 401 is located downstream of the dense phase branch channel 301, a plurality of filter holes are arranged on the upper side wall of the enrichment channel 401 (or the upper side wall of the enrichment channel 401 is a porous filter material such as metal or ceramic), after the dense phase branch enters the enrichment channel 401, the airflow can enter the air chamber 402 through the filter holes, and the powder is retained on the wall surface of the enrichment channel 401. The vent hole 403 can realize the functions of air extraction and air supplementing of the enrichment channel 401 through an external frequency conversion fan and an anemometer device.

[0042] It can be understood that when the solid-gas ratio of the dense phase flow entering the enrichment channel 401 is lower than the required value of the working condition, air is extracted from the vent hole 403 by the fan until the concentration of the two-phase flow at the outlet of the enrichment channel 401 reaches the required value of the working condition. At this time, the pressure of the air chamber 402 is relatively low, and the powder will gradually accumulate on the inner wall surface of the enrichment channel 401. In order to remove the accumulated powder and ensure the smoothness of the filtration, periodic shaking, ultrasonic waves, compressed air blowing and the like can be used to periodically clean the inner wall surface of the enrichment channel 401.

[0043] Similarly, when the solid-gas ratio of the dense phase flow entering the enrichment channel 401 is lower than the required value of the working condition, the direction of the fan connected with the vent hole 403 is reversed, and the airflow is supplemented into the enrichment channel 401 until the concentration of the two-phase flow at the outlet of the enrichment channel 401 reaches the required value of the working condition. At this time, the inner wall surface of the enrichment channel 401 will not accumulate powder, so it is not necessary to clean it regularly.

[0044] Specifically, as shown in Figure 2 the dense phase area C2 and the dilute phase area D2 of the outlet of the separation device in the embodiment of the present application. In the related art, as shown in Figure 1 the dense phase area C1 and the dilute phase area D1 of the outlet of the separator. The area of C2 is smaller than the area of C1, so that the powder enrichment area of the outlet of the separator in the embodiment of the present application is more concentrated.

[0045] Therefore, under the flow guiding and converging effect of the flow guiding assembly 2, the powder enrichment area of the outlet of the separator of the embodiment of the present application is relatively concentrated. By rotating the separation plate 32 to adjust the flow rate and solid-gas ratio of the dense phase branch flow, the problem of fixed concentration of the dense phase branch flow and the dilute phase branch flow after separation of the separator in the related art is solved. Moreover, the concentration of the dense phase branch flow is fine-tuned by the enrichment assembly 4, and the enrichment effect of the separator of the embodiment of the present application is further strengthened.

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

[0047] Wherein, the first direction refers to the left-right direction as shown in Figure 4 . The first flow guide plate 21 and the second flow guide plate 22 are symmetrically arranged, the upstream end of the first flow guide plate 21 is flush with the upstream end of the second flow guide plate 22, and the downstream end of the first flow guide plate 21 is flush with the downstream end of the second flow guide plate 22.

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

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

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

[0051] Specifically, a is 30°. It can be understood that when the separator of the embodiment of the present application is in operation, the gas-solid two-phase flow enters the separator from the lower inlet, and when passing through the elbow portion 11, the powder is enriched to the outside of the elbow portion 11 under the action of inertia. When entering the elbow portion 11 by about 30°, the dense phase powder on the outside of the elbow portion 11 enters the collection channel 201, and under the flow guiding action of the first tapered section 211 and the second tapered section 221, the dense phase powder on the outside of the elbow portion 11 is gradually collected to the center to form an outlet dense phase enrichment area. Figure 2 .

[0052] In some embodiments, as shown in Figures 3 to 9 , the partition plate 32 is provided with a first gas blowing channel 321 extending along the length direction of the partition plate 32 (such as the front-rear direction in Figure 7 ). The first gas blowing channel 321 has a first gas inlet end and a first gas outlet end, and the first gas outlet end is located on the end face of the partition plate 32 close to the collection channel 201 (such as the front end face of the partition plate 32 in Figure 7 ). The first gas outlet end is provided with a first flow dividing block 322, and the first flow dividing block 322 divides the first gas outlet end into a first jet port 3211 and a second jet port 3212, the extension direction of the first jet port 3211 is parallel to the extension direction of the first gas blowing channel 321, and the extension direction of the second jet port 3212 has an included angle with the extension direction of the first gas blowing channel 321, and the cross-sectional area of the first jet port 3211 is smaller than that of the second jet port 3212.

[0053] The partition plate 32 is also provided with a second gas blowing channel 323 extending along the length direction of the partition plate 32, and the second gas blowing channel 323 has a second gas inlet end and a second gas outlet end, and the second gas outlet end is located on the end face of the partition plate 32 close to the collection channel 201. The second gas outlet end is provided with a second flow dividing block 324, and the second flow dividing block 324 and the first flow dividing block 322 are oppositely distributed along the thickness direction of the partition plate 32 (such as the up-down direction in Figure 7 ). The second flow dividing block 324 divides the second gas outlet end into a third jet port 3231 and a fourth jet port 3232, the extension direction of the third jet port 3231 is parallel to the extension direction of the second gas blowing channel 323, and the extension direction of the fourth jet port 3232 has an included angle with the extension direction of the second gas blowing channel 323, and the cross-sectional area of the third jet port 3231 is smaller than that of the fourth jet port 3232.

[0054] Optionally, as shown in Figure 7As shown, the first blowing passage 321 is located above the second blowing passage 323. The cross-sectional shape of the first flow dividing block 322 and the second flow dividing block 324 is triangular, the lower side of the first flow dividing block 322 is the first nozzle 3211, the upper side of the first flow dividing block 322 is the second nozzle 3212, the upper side of the second flow dividing block 324 is the third nozzle 3231, and the lower side of the second flow dividing block 324 is the second nozzle 3212.

[0055] As can be understood, as shown, when the partition plate 32 is turned upward or downward by a large angle, the powder will accumulate on the windward surface of the partition plate 32 due to the inertial effect, which is not conducive to the stable operation of the separator. Figure 5

[0056] For example, as shown in Figs. 4 and 5, when the partition plate 32 is turned downward, the first blowing passage 321 is ventilated, and the second blowing passage 323 is not ventilated. At this time, the blowing gas flow passes through the first blowing passage 321 and is divided into two streams under the action of the first flow dividing block 322. Among them, one larger stream is sprayed obliquely upward and mixed with the gas flow from the collection passage 201 to form a larger recirculation zone M, and the other smaller stream is sprayed along a direction parallel to the first blowing passage 321 to form a smaller recirculation zone N. Figure 8 Figure 9 Therefore, the powder that would be deposited on the partition plate 32 under the action of inertia will directly enter the center position of the dense phase branch passage 301 under the entrainment of the recirculation zone M, thereby avoiding deposition, and the powder that would directly impact the tip of the partition plate 32 will enter the lower dilute phase branch passage under the action of the recirculation zone N, thereby avoiding the problem of wear of the partition plate 32 and plugging of the nozzle.

[0057] Similarly, when the partition plate 32 is turned upward, the second blowing passage 323 is ventilated, and the first blowing passage 321 is not ventilated. At this time, the blowing gas flow passes through the second blowing passage 323 and is divided into two streams under the action of the second flow dividing block 324. Among them, one larger stream is sprayed obliquely downward and mixed with the gas flow from the collection passage 201 to form a larger recirculation zone in the dilute phase branch passage, and the other smaller stream is sprayed along a direction parallel to the second blowing passage 323 to form a smaller recirculation zone.

[0058] Similarly, when the partition plate 32 is turned upward, the second blowing passage 323 is ventilated, and the first blowing passage 321 is not ventilated. At this time, the blowing gas flow passes through the second blowing passage 323 and is divided into two streams under the action of the second flow dividing block 324. Among them, one larger stream is sprayed obliquely downward and mixed with the gas flow from the collection passage 201 to form a larger recirculation zone in the dilute phase branch passage, and the other smaller stream is sprayed along a direction parallel to the second blowing passage 323 to form a smaller recirculation zone.

[0059] As shown in Figs. 6 and 7, the shaft 31 is provided with a gas injection hole 311, and the first gas inlet end and the second gas inlet end are respectively connected with the gas injection hole 311. The separation assembly 3 further comprises a gas path switching switch 33, which is rotatably arranged in the gas injection hole 311, and the gas path switching switch 33 is used to control the opening and closing of the first gas inlet end or the second gas inlet end with the gas injection hole 311. Figures 7 to 9

[0060] ​​​It can be understood that, as Figure 7 The injection hole 311 circumscribes the gas source, and the injection hole 311 is a main channel of the blowing gas flow. The gas path switching switch 33 is rotated upward, the first air inlet end is blocked, and the blowing gas flow enters the second blowing channel. The gas path switching switch 33 is rotated downward, the second air inlet end is blocked, and the blowing gas flow enters the first blowing channel.

[0061] In some embodiments, as Figures 3 to 9 The limiting plate 5 is arranged between the first flat section 212 and the second flat section 222, and the limiting plate 5 is located outside the dense phase branch channel 301. For example, as Figure 9 As shown in the figure, 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 application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0063] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0064] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0066] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers for different elements, regions, or layers, and are not intended to be taken literally, unless otherwise specified.

[0067] Although the above-mentioned embodiments have been shown and described, it is to be understood that these embodiments are exemplary only, and are not to be taken as limiting the scope of the present application, and that changes, modifications, substitutions and variations can be made to the above-mentioned embodiments by those skilled in the art without departing from the scope of the present application.

Claims

1. A concentration-degradation separation device, characterized in that, include: The body of the bend; A flow guiding assembly includes a first flow guiding plate and a second flow guiding plate. Both the first flow guiding plate and the second flow guiding plate are disposed on the inner wall of the outer side of the bent pipe body. The first flow guiding plate includes a first tapered section and a first straight section connected in sequence along the airflow direction. The second flow guiding plate includes a second tapered section and a second straight section connected in sequence along the airflow direction. The first straight section and the second straight section are arranged parallel to each other. The first tapered section and the second tapered section are spaced apart to jointly define a converging channel. The distance between the first tapered section and the second tapered section gradually decreases along the airflow direction. A separation assembly includes a rotating shaft and a partition plate. The partition plate is rotatably disposed 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 wall of the bend body together define a dense phase branch channel, which is connected to the converging channel. A concentration assembly is connected to the bent tube body. The concentration assembly has a concentration channel, a gas chamber, and a vent. The concentration channel is connected to the concentrated phase branch channel. The peripheral wall of the concentration channel is provided with multiple filter holes. The concentration channel is connected to the gas chamber through the filter holes, and the vent is connected to the gas chamber.

2. The concentration-depreciation separation device 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 bend body in a first direction.

3. The concentration-depreciation separation device according to claim 2, characterized in that, The bend body includes a bend section and a straight section connected together. The first tapered section and the second tapered section are both located within the bend section, and the first straight section and the second straight section are both located within the straight section.

4. The concentration-depreciation separation device according to claim 3, characterized in that, The line connecting the upstream end of the bend to the center of the bend is L1, and the line connecting the upstream end of the first tapered section to the center of the bend is L2. The included angle between L1 and L2 is α, and 20° < α < 55°.

5. The concentration-depreciation separation device according to claim 3, characterized in that, The downstream end of the first tapered section is flush with the downstream end of the bend, the upstream end of the first straight section is flush with the upstream end of the straight section, and the downstream end of the first straight section is flush with the downstream end of the straight section.

6. The concentration-depreciation separation device according to claim 1, characterized in that, The partition plate has a first air blowing channel extending along its length. The first air blowing channel has a first air inlet and a first air outlet. The first air outlet is located on the end face of the partition plate near the converging channel. A first diverting block is provided at the first air outlet, which divides the first air outlet into a first nozzle and a second nozzle. The extension direction of the first nozzle is parallel to the extension direction of the first air blowing channel, and the extension direction of the second nozzle forms an angle with the extension direction of the first air blowing channel. The cross-sectional area of ​​the first nozzle is smaller than that of the second nozzle.

7. The concentration-depreciation separation device according to claim 6, characterized in that, The partition plate also includes a second air-blowing channel extending along its length. The second air-blowing channel has a second air inlet and a second air outlet. The second air outlet is located on the end face of the partition plate near the converging channel. A second diverting block is provided at the second air outlet. The second diverting block and the first diverting block are distributed opposite to each other along the thickness direction of the partition plate. The second diverting block divides the second air outlet 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. The extension direction of the fourth nozzle forms an angle with the extension direction of the second air-blowing channel. The cross-sectional area of ​​the third nozzle is smaller than that of the fourth nozzle.

8. The concentration-depreciation separation device according to claim 7, characterized in that, The partition plate has a first mode and a second mode. In the first mode, the first air blowing channel is open and the second air blowing channel is blocked. In the second mode, the first air blowing channel is blocked and the second air blowing channel is open.

9. The concentration-depreciation separation device according to claim 8, characterized in that, The rotating shaft is provided with an air injection hole. The first air inlet and the second air inlet are respectively connected to the air injection hole. The separation component also includes an air path switching switch. The air path switching switch is rotatably disposed in the air injection hole. The air path switching switch is used to control the connection and disconnection between the first air inlet or the second air inlet and the air injection hole.

10. The concentration-depreciation separation device according to claim 1, characterized in that, It also includes a limiting plate, which is disposed between the first straight section and the second straight section. The limiting plate is located outside the dense phase branch channel and is used to limit the rotation angle of the separator.

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