A mixed type powder concentration and dilution separator

Abstract

The application provides a mixed powder concentration and dilution separator, which comprises a conveying pipeline, a first exhaust section, a second exhaust section, a pressurizing assembly and a blocking piece. The second end of the conveying pipeline is provided with a first outlet and a second outlet. The first end of the first exhaust section is communicated with the first outlet. The first end of the second exhaust section is communicated with the second end of the first exhaust section. The second end of the first exhaust section is located in the second end of the second exhaust section. There is a gap between the outer peripheral wall of the first exhaust section and the inner peripheral wall of the second exhaust section. The pressurizing assembly comprises a pressurizing piece and a first chamber. The first chamber and the second exhaust section are connected with the pressurizing piece. The overlapping part of the first exhaust section and the second exhaust section is located in the cavity of the first chamber. The blocking piece is arranged in the second exhaust section and is used for blocking the powder in the second exhaust section from entering the pressurizing piece. The mixed powder concentration and dilution separator can improve the flow effect of the concentrated phase branch flow, so as to ensure the total flow of the concentrated phase branch flow.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dense and dilute separation burner, in particular to a mixed type powder dense and dilute separator. BACKGROUND

[0002] Pneumatic conveying is a common powder conveying method in industry. Generally in the field of combustion, increasing the concentration of powder (usually 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. Among them, dense and dilute separation generally occurs in the field of dense and dilute separation burner.

[0003] In the related art, when the downstream resistance of the dense phase branch flow of the dense and dilute separator is too large, only relying on the self-power of the gas flow after separation leads to low total flow or solid-gas ratio of the dense phase branch flow, and it is also difficult to realize accurate adjustment of the total flow and solid-gas ratio of the dense phase branch flow. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0005] To this end, an embodiment of the present application proposes a mixed type powder dense and dilute separator, which can improve the flow effect of the dense phase branch flow, thereby ensuring the total flow of the dense phase branch flow.

[0006] The mixed type powder dense and dilute separator of the embodiment of the present application comprises:

[0007] A conveying pipeline, a first end of the conveying pipeline is used for introducing powder, a second end of the conveying pipeline has a first outlet and a second outlet arranged radially along the conveying pipeline, the powder introduced into the conveying pipeline can be divided into a dense phase branch flow and a dilute phase branch flow in the conveying pipeline, and the dense phase branch flow can be discharged through the first outlet, and the dilute phase branch flow can be discharged through the second outlet;

[0008] A first exhaust section and a second exhaust section, a first end of the first exhaust section is in communication with the first outlet, a first end of the second exhaust section is in communication with a second end of the first exhaust section, and a second end of the first exhaust section is located in a second end of the second exhaust section, and there is a gap between an outer peripheral wall of the second end of the first exhaust section and an inner peripheral wall of the first end of the second exhaust section;

[0009] A booster assembly, the booster assembly comprises a booster and a first chamber, the booster has a gas outlet and a gas inlet, the first chamber is connected with the gas outlet, the second end of the second exhaust section is connected with the gas inlet, the second end of the first exhaust section and the first end of the second exhaust section are both located in a cavity of the first chamber, and the gas discharged from the gas outlet enters the booster through the first chamber, the second exhaust section and the gas inlet in sequence; and,

[0010] A blocking member is arranged in the second exhaust section and is arranged along the circumference of the second end of the first exhaust section and is adapted to the inner circumferential wall of the second end of the second exhaust section, and the blocking member is used to block the powder in the second exhaust section from entering the booster.

[0011] The mixed type powder concentration and dilution separator of the embodiments of the present application can form a negative pressure between the outer circumferential wall of the second end of the first exhaust section and the inner circumferential wall of the first end of the second exhaust section by using the booster assembly, so that the resistance downstream of the separator can be offset, and thus the total flow of the concentrated phase branch can reach the design value.

[0012] In some embodiments, the booster assembly further comprises an exhaust branch and an intake branch, the first end of the exhaust branch is connected between the first chamber and the booster, the first end of the intake branch is connected between the second exhaust section and the booster,

[0013] The exhaust branch is provided with a first valve, and the intake branch is provided with a second valve, so that when the first valve is opened, the gas in the second exhaust section can be discharged through the exhaust branch, and when the second valve is opened, the external air can enter the first chamber through the intake branch.

[0014] In some embodiments, in a plane perpendicular to the extension direction of the first exhaust section, the cross-sectional area of the first exhaust section gradually decreases along the direction from the first end of the first exhaust section to the second end of the first exhaust section.

[0015] In some embodiments, the second exhaust section has a first section and a second section connected in sequence, the first end of the second exhaust section forms the first end of the first section, and the second end of the second exhaust section forms the second end of the second section, and in a plane perpendicular to the extension direction of the second exhaust section, the cross-sectional area of the second end of the first section gradually increases along the direction from the first end of the first section to the second end of the first section.

[0016] In some embodiments, the first end of the blocking member is connected to the first end of the second section, and the first end of the blocking member is arranged along the circumference of the port of the second end of the first section and surrounds the second end of the first section, and the second end of the blocking member is connected to the second end of the second section.

[0017] In some embodiments, a charging assembly is further arranged in the first exhaust section, the charging assembly comprises a discharging member, the discharging member comprises a discharging part and an insulating part, the insulating part is used to be connected to the first exhaust section, the discharging member is used to be connected to the negative electrode of a power supply, and the extension direction of the discharging member is consistent with the extension direction of the first exhaust section.

[0018] In some embodiments, a spiral vane is further included, which is connected to the outer peripheral wall of the second end of the first exhaust section and is located between the outer peripheral wall of the second end of the first exhaust section and the inner peripheral wall of the first end of the second exhaust section, the spiral vane is arranged along the second end of the first exhaust section in a circumferential direction of the second end of the first exhaust section, and the extending direction of the spiral vane is consistent with the extending direction of the first exhaust section.

[0019] In some embodiments, the discharge part further includes a discharge tip, a first end of the discharge tip is connected to the discharge part, and a plurality of the discharge tips are arranged in a circumferential direction of the discharge part.

[0020] In some embodiments, a plurality of discharge tip groups are further included, each of the discharge tip groups includes a plurality of the discharge tips, and the plurality of the discharge tip groups are arranged in an extending direction of the discharge part.

[0021] In some embodiments, the blocking member is made of a conductive material. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a mixed type powder concentration and dilution separator according to an embodiment of the present application.

[0023] Figure 2 is a structural schematic diagram of a mixed type powder concentration and dilution separator according to an embodiment of the present application.

[0024] Figure 3 is Figure 2 is a schematic diagram of A-A plane shown in FIG.

[0025] Figure 4 is Figure 3 is an enlarged schematic diagram of B shown in FIG.

[0026] Figure 5 is a structural schematic diagram of a mixed type powder concentration and dilution separator according to an embodiment of the present application.

[0027] REFERENCE SIGNS:

[0028] Conveying pipeline 1; first outlet 11; second outlet 12;

[0029] First exhaust section 21;

[0030] Second exhaust section 22; first section 221; second section 222;

[0031] Pressurizing assembly 3; pressurizing member 31; gas outlet 311; gas inlet 312; first connecting pipe 32; second connecting pipe 33; first cavity 34; exhaust branch 36; gas inlet branch 35;

[0032] the blocking member 4;

[0033] the charging assembly 5; the discharging member 51; the discharging part 511; the insulation part 512; the discharging tip 513;

[0034] the helical blade 6; DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0036] As Figures 1-5 shown, the mixed type powder concentration separation device of the embodiment of the present application comprises a conveying pipe 1, a first exhaust section 21, a second exhaust section 22, a pressurizing assembly 3 and a blocking member 4.

[0037] The first end of the conveying pipe 1 is used for powder input, and the second end of the conveying pipe 1 has a first outlet 11 and a second outlet 12 arranged radially along the conveying pipe 1. The powder input into the conveying pipe 1 can be divided into a dense phase branch flow and a dilute phase branch flow in the conveying pipe 1, and the dense phase branch flow can be discharged through the first outlet 11, and the dilute phase branch flow can be discharged through the second outlet 12.

[0038] Specifically, as Figures 1-5 shown, the lower end of the conveying pipe 1 is the first end of the conveying pipe 1, and the upper end of the conveying pipe 1 is the second end of the conveying pipe 1. The powder can enter the conveying pipe 1 through the lower end of the conveying pipe 1 and can be discharged through the upper end of the conveying pipe 1.

[0039] It can be understood that when the powder is input into the first end of the conveying pipe 1, it has a certain initial speed, so that in the process of flowing in the conveying pipe 1, under the action of inertia, the powder flow can be divided into a dense phase branch flow and a dilute phase branch flow, that is, the branch flow adjacent to the left wall surface of the conveying pipe 1 is the dilute phase branch flow, and the branch flow adjacent to the right wall surface of the conveying pipe 1 is the dense phase branch flow. In other words, when the powder is conveyed, the solid phase in the powder flow is more likely to gather adjacent to the right wall surface of the conveying pipe 1. Among them, the powder can be coal powder, that is, the mixed type powder concentration separation device of the embodiment of the present application can be used in combination with a coal powder burner, of course

[0040] Optionally, as Figure 1 shown, the conveying pipe 1 can be an arc-shaped pipe to facilitate the division of the conveyed powder flow into a dense phase branch flow and a dilute phase branch flow.

[0041] The first end of the first exhaust section 21 (i.e. the right end of the first exhaust section 21) is communicated with the first outlet 11, the first end of the second exhaust section 22 (i.e. the right end of the second exhaust section 22) is communicated with the second end of the first exhaust section 21 (i.e. the left end of the first exhaust section 21), and the second end of the first exhaust section 21 is located in the first end of the second exhaust section 22, and there is a gap between the outer circumferential wall of the second end of the first exhaust section 21 and the inner circumferential wall of the first end of the second exhaust section 22.

[0042] It can be understood that, as shown in Figure 3 and Figure 4 , the powder gas flow is divided into a dense phase branch and a dilute phase branch by the conveying pipeline 1, the dilute phase branch can be discharged through the second outlet 12, and the dense phase branch enters the first exhaust section 21 through the first outlet 11 and can be discharged through the second end of the second exhaust section 22.

[0043] The booster assembly 3 comprises a booster 31 and a first chamber 34, the booster 31 has a gas outlet 311 and a gas inlet 312, the first chamber 34 is connected with the gas outlet 311, the second end of the second exhaust section 22 is connected with the gas inlet 312, and the second end of the first exhaust section 21 and the first end of the second exhaust section 22 are both located in the cavity of the first chamber 34, and the gas discharged from the gas outlet 311 enters the booster 31 through the first chamber 34, the second exhaust section 22 and the gas inlet 312 in sequence.

[0044] Specifically, as shown in Figure 3 and Figure 4 , the gas outlet 311 is arranged at the right end of the booster 31, the gas inlet 312 is arranged at the left end of the booster 31, the first chamber 34 is connected with the gas outlet 311 through the first connecting pipe 32, and the gas inlet 312 is connected with the second exhaust section 22 through the second connecting pipe 33.

[0045] It can be understood that the booster 31 can be a booster fan, when the booster 31 is started, the booster 31 can discharge the gas through the gas outlet 311 and into the first chamber 34 through the first connecting pipe 32, and then into the second exhaust section 22 through the gap between the outer circumferential wall of the second end of the first exhaust section 21 and the inner circumferential wall of the first end of the second exhaust section 22. It should be noted that, because the cross-sectional area of the gas passing through the gap between the outer circumferential wall of the second end of the first exhaust section 21 and the inner circumferential wall of the first end of the second exhaust section 22 is sharply reduced, the gas flow through the gap can be accelerated, thereby forming a high-speed jet (i.e. according to Bernoulli equation), and a negative pressure is formed at the gap, thereby offsetting the positive pressure caused by excessive resistance downstream of the separator.

[0046] In addition, the start of the booster 31 only uses the gas in the first connecting pipe 32, the second connecting pipe 33, the first chamber 34 and the second exhaust section 22, that is, after the start of the booster 31, the circulating gas all comes from the inside of the separator, avoiding the dilution of the dense phase branch caused by the entry of external gas. If the resistance downstream of the separator increases, the frequency of the frequency converter of the booster 31 can be increased to increase the negative pressure of the gap between the outer peripheral wall of the second end of the first exhaust section 21 and the inner peripheral wall of the first end of the second exhaust section 22, thereby increasing the flow speed of the dense phase branch in the first exhaust section 21, and vice versa.

[0047] The blocking member 4 is arranged in the second exhaust section 22 and is arranged along the circumference of the second exhaust section 22 and is adapted to the inner peripheral wall of the second exhaust section 22. The blocking member 4 is used to block the powder in the second exhaust section 22 from entering the booster 31. It can be understood that in the plane perpendicular to the left-right direction, the cross-sectional profile of the blocking member 4 is similar to the profile of the second exhaust section 22, and the length of the blocking member 4 is equal to the length of the second end of the second exhaust section 22, so as to avoid the solid particles in the dense phase gas flow entering the second exhaust section 22 from being discharged through the second connecting pipe 33.

[0048] It should be noted that the blocking member 4 can be a sintered mesh, and the pore size of the blocking member 4 is smaller than the size of the powder particles in the dense phase branch.

[0049] In other words, the mixed type powder thick and thin separator of the embodiment of the present application can form a negative pressure between the outer peripheral wall of the second end of the first exhaust section 21 and the inner peripheral wall of the first end of the second exhaust section 22 by using the booster assembly 3, so as to offset the resistance downstream of the separator, thereby ensuring that the total flow of the dense phase branch can reach the design value.

[0050] Therefore, the mixed type powder thick and thin separator of the embodiment of the present application can improve the flow effect of the dense phase branch, thereby ensuring the total flow of the dense phase branch.

[0051] In some embodiments, the booster assembly 3 further comprises an exhaust branch 36 and an intake branch 35. The first end of the exhaust branch 36 is connected between the first chamber 34 and the booster 31, and the first end of the intake branch 35 is connected between the second exhaust section 22 and the booster 31. The exhaust branch 36 is provided with a first valve (not shown in the figure), and the intake branch 35 is provided with a second valve (not shown in the figure), so that when the first valve is opened, the gas in the second exhaust section 22 can be discharged through the exhaust branch 36; and when the second valve is opened, external air can enter the first chamber 34 through the intake branch 35.

[0052] Specifically, as shown in FIG. 4, the first end of the exhaust branch 36 is connected to the first chamber 34, and the second end of the exhaust branch 36 is connected to the booster 31. The first end of the intake branch 35 is connected to the second exhaust section 22, and the second end of the intake branch 35 is connected to the booster 31. Figure 3 and Figure 4As shown, the lower end of the exhaust branch 36 is connected with the first connecting pipe 32, and when the second valve is opened, the first connecting pipe 32 connects the first chamber 34 and the exhaust branch 36. The lower end of the intake branch 35 is connected with the second connecting pipe 33, and when the first valve is opened, the second connecting pipe 33 connects the second exhaust section 22 and the exhaust branch 36.

[0053] It can be understood that the solid-gas ratio of the dense phase gas flow in the second exhaust section 22 can be adjusted by using the booster 31, the exhaust branch 36 and the intake branch 35, i.e. after starting the booster 31:

[0054] If it is required to increase the solid-gas ratio of the dense phase branch, the second valve should be closed, and the first valve should be opened at the same time. At this time, part of the gas flow generated by the booster 31 will be discharged through the exhaust branch 36, reducing the air content entering the first chamber 34, thereby achieving the effect of enrichment. Correspondingly, the higher the requirement for the solid-gas ratio of the dense phase branch, the greater the opening degree of the first valve on the exhaust branch 36 should be.

[0055] If it is required to reduce the solid-gas ratio of the dense phase branch, the first valve should be closed, and the second valve should be opened at the same time. At this time, the gas entering through the intake branch 35 and the gas flowing into the second connecting pipe 33 from the second exhaust section 22 enter the booster 31 at the same time, increasing the total amount of gas in the first connecting pipe 32, the second connecting pipe 33, the first chamber 34 and the second exhaust section 22, thereby achieving the effect of dilution. Correspondingly, the more the solid-gas ratio of the dense phase branch needs to be reduced, the greater the opening degree of the second valve of the intake branch 35 should be.

[0056] In some embodiments, in a plane perpendicular to the extension direction of the first exhaust section 21 (i.e. the left-right direction in Figure 3 The cross-sectional area of the first exhaust section 21 gradually decreases in a direction from the first end of the first exhaust section 21 to the second end of the first exhaust section 21 in the plane perpendicular to the left-right direction.

[0057] Specifically, as shown in Figures 3-5 The cross-sectional area of the first exhaust section 21 gradually decreases in a direction from the right to the left in the plane perpendicular to the left-right direction, so as to increase the flow rate of the dense phase branch in the first exhaust section 21 and improve the conveying efficiency.

[0058] In some embodiments, the second exhaust section 22 has a first section 221 and a second section 222 connected in sequence, the first end of the second exhaust section 22 forms the first end of the first section 221, and the second end of the second exhaust section 22 forms the second end of the second section 222. In a plane perpendicular to the extension direction of the second exhaust section 22, the cross-sectional area of the second end of the first section 221 gradually increases in a direction from the first end of the first section 221 to the second end of the first section 221.

[0059] Specifically, as shown inFigures 3-5 As shown, the first segment 221 is located to the right of the second segment 222. In a plane orthogonal to the left and right directions, the cross-sectional area of ​​the second end of the first segment 221 gradually increases from right to left to reduce the possibility of blockage in the second exhaust segment 22.

[0060] In some embodiments, the first end of the blocking member 4 (i.e. the right end of the blocking member 4) is connected to the first end of the second segment 222 (the right end of the second segment 222), and the first end of the blocking member 4 is arranged around the second end of the first segment 221 in the circumferential direction of the port of the second end of the first segment 221, and the second end of the blocking member 4 (i.e. the left end of the blocking member 4) is connected to the second end of the second segment 222 (i.e. the left end of the second segment 222).

[0061] The inventors discovered that when part of the airflow in the second exhaust section 22 passes through the barrier 4 and enters the second connecting pipe 33, some powder in the dense phase branch remains on the inner surface of the barrier 4, forming a powder cake. When the powder cake accumulates to a certain thickness, it obstructs the airflow passing through the barrier 4, requiring removal of the powder cake. Typically, compressed air blowing or mechanical vibration are used to periodically clean the powder cake. However, because these methods are periodic, they affect the stability of the dense phase branch, and the periodically shed powder causes a periodic fluctuation in the solid-gas ratio of the dense phase branch. When downstream powder-using equipment of the separator has high stability requirements, the above-mentioned dust removal methods are insufficient.

[0062] Therefore, in some embodiments, the mixed powder concentration separator of the present invention further includes a charging component 5, which is disposed within the first exhaust section 21. The charging component 5 includes a discharge element 51, which includes a discharge portion 511 and an insulating portion 512. The insulating portion 512 is used to connect to the first exhaust section 21, and the discharge element 51 is used to connect to the negative terminal of the power supply. The extending direction of the discharge element 51 is consistent with the extending direction of the first exhaust section 21. Preferably, the power supply is a high-voltage power supply with a voltage of 40kV-75kV.

[0063] Specifically, such as Figures 3-5 As shown, the discharge element 51 extends in the left-right direction, the insulating part 512 is made of insulating material such as rubber and is fixedly connected to the peripheral wall of the first exhaust section 21, and the length of the discharge part 511 is approximately the same as the length of the first exhaust section 21.

[0064] Optionally, the discharge section 511 further includes a discharge tip 513, the first end of which is connected to the discharge section 511. There are multiple discharge tips 513, which are arranged at intervals along the circumference of the discharge section 511.

[0065] Preferably, the mixed powder concentration and dilution separator according to the embodiment of the present application further comprises a plurality of discharge tip groups, each of which comprises a plurality of discharge tips 513, and the plurality of discharge tip groups are arranged at intervals along the extension direction of the discharge section 511. The barrier 4 is made of a conductive material.

[0066] In some embodiments, the mixed powder concentration and dilution separator according to the embodiment of the present application further comprises a spiral blade 6, which is connected to the outer peripheral wall of the second end of the first exhaust section 21 and is located between the outer peripheral wall of the second end of the first exhaust section 21 and the inner peripheral wall of the first end of the second exhaust section 22, the spiral blade 6 is arranged around the second end of the first exhaust section 21 in the circumferential direction of the second end of the first exhaust section 21, and the extension direction of the spiral blade 6 is consistent with the extension direction of the first exhaust section 21.

[0067] It can be understood that, as shown in the figure, Figures 1-5 When the mixed powder concentration and dilution separator according to the embodiment of the present application is in operation, the concentrated phase branch flow from the conveying pipeline 1 enters the first exhaust section 21, and then the solid particles in the branch flow are converted into charged particles through the corona discharge effect of the discharge member 51. After the charged particles flow through the second exhaust section 22, they are propelled by the kinetic energy and potential energy of the airflow flowing through the barrier 4 towards the barrier 4 as an anode plate (the barrier 4 can be used as an anode plate by being grounded), and accumulate on the inner surface of the barrier 4 to form a powder cake. After the solid particles are charged, they exhibit a dendritic structure on the powder cake, which is much looser than the uncharged powder cake, not only significantly reducing the resistance, but also being more easily stripped by the annular airflow from the gap between the outer peripheral wall of the second end of the first exhaust section 21 and the inner peripheral wall of the first end of the second exhaust section 22.

[0068] In addition, the gap between the outer peripheral wall of the second end of the first exhaust section 21 and the inner peripheral wall of the first end of the second exhaust section 22 is provided with a spiral blade 6, on the one hand, the high-speed jet flow ejected from the gap increases the tangential velocity on the basis of the axial velocity, thereby further increasing the jet flow velocity under the condition of constant airflow, so as to form a greater negative pressure according to the Bernoulli equation. On the other hand, the tangential velocity of the jet flow causes the annular jet flow to rotate tightly against the wall surface of the barrier 4 after leaving the second end of the first exhaust section 21 under the action of centrifugal force, thereby forming a high-speed "airflow scraper" near the inner surface of the barrier 4, which continuously removes the loose powder cake after charging, so that the powder cake always maintains a very thin degree. This dust removal method is not periodic, which can ensure the stability of the solid-gas ratio of the concentrated phase branch flow, and can also minimize the airflow resistance through the barrier 4.

[0069] In the description of the application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0070] In addition, the terms "first", "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 thereby. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0071] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, 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 explicitly 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.

[0072] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0073] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising, but not limited to, any indicated features, integers, steps or components. It is also to be understood that the terminology "comprising" can be replaced by the terminology "consisting of" or "consisting essentially of" in some embodiments or examples.

[0074] Although the above-mentioned embodiments have been shown and described, it is to be understood that the above-mentioned embodiments are exemplary, and should not be understood as limiting the present disclosure, and the changes, modifications, replacements and variations of the above-mentioned embodiments made by those skilled in the art are within the protection scope of the present disclosure.

Claims

1. A hybrid powder concentration / dilution separator characterized by, The application relates to a powder conveying device, comprising: a conveying pipe, a first end of the conveying pipe being used for feeding powder, a second end of the conveying pipe being provided with a first outlet and a second outlet arranged radially along the conveying pipe, the powder being fed into the conveying pipe and being capable of being divided into a dense phase branch and a dilute phase branch in the conveying pipe, the dense phase branch being capable of being discharged through the first outlet, and the dilute phase branch being capable of being discharged through the second outlet; a first exhaust section and a second exhaust section, a first end of the first exhaust section being communicated with the first outlet, a first end of the second exhaust section being communicated with a second end of the first exhaust section, and a second end of the first exhaust section being located in the first end of the second exhaust section, a gap being formed between an outer peripheral wall of the second end of the first exhaust section and an inner peripheral wall of the first end of the second exhaust section; a pressurizing assembly, the pressurizing assembly comprising a pressurizing member and a first chamber, the pressurizing member being provided with an outlet and an inlet, the first chamber being communicated with the outlet, a second end of the second exhaust section being communicated with the inlet, the second end of the first exhaust section and the first end of the second exhaust section being located in a cavity of the first chamber, and gas discharged from the outlet entering the pressurizing member through the first chamber, the second exhaust section and the inlet in sequence; and a blocking member arranged in the second exhaust section and adapted to the inner peripheral wall of the second exhaust section, the blocking member being used for blocking the powder in the second exhaust section from entering the pressurizing member; the pressurizing member being configured to start, so that gas is discharged from the outlet and enters the first chamber, and then enters the second exhaust section through the gap between the outer peripheral wall of the second end of the first exhaust section and the inner peripheral wall of the first end of the second exhaust section.

2. The hybrid powder concentration / dispersion separator of claim 1, wherein the pressurizing assembly further comprising an exhaust branch and an inlet branch, a first end of the exhaust branch being connected between the first chamber and the pressurizing member, and a first end of the inlet branch being connected between the second exhaust section and the pressurizing member, the exhaust branch being provided with a first valve, and the inlet branch being provided with a second valve, so that when the first valve is opened, the gas in the second exhaust section can be discharged through the exhaust branch, and when the second valve is opened, external air can enter the first chamber through the inlet branch.

3. The hybrid powder concentration / dispersion separator of claim 1, wherein In a plane perpendicular to the extending direction of the first exhaust section, the cross-sectional area of the first exhaust section gradually decreases along the direction from the first end of the first exhaust section to the second end of the first exhaust section.

4. The hybrid powder concentration / dispersion separator of claim 1, wherein The second exhaust section is provided with a first section and a second section connected in sequence, a first end of the second exhaust section forming a first end of the first section, and a second end of the second exhaust section forming a second end of the second section, in a plane perpendicular to the extending direction of the second exhaust section, the cross-sectional area of the second end of the first section gradually increases along the direction from the first end of the first section to the second end of the first section.

5. The hybrid powder concentration / dispersion separator of claim 4, wherein The first end of the blocking member is connected to the first end of the second section, and the first end of the blocking member is arranged along the circumference of the port of the second end of the first section and surrounds the second end of the first section, and the second end of the blocking member is connected to the second end of the second section.

6. The hybrid powder concentration / dispersion separator according to any one of claims 1 to 5, wherein The electric charging assembly is arranged in the first exhaust section, and the electric charging assembly comprises a discharging member, the discharging member comprises a discharging part and an insulation part, the insulation part is arranged to be connected to the first exhaust section, the discharging member is arranged to be connected to the negative pole of a power supply, and the extension direction of the discharging member is consistent with the extension direction of the first exhaust section.

7. The hybrid powder concentration / dispersion separator of claim 6, wherein The spiral blade is arranged to be connected to the outer circumferential wall of the second end of the first exhaust section and located between the outer circumferential wall of the second end of the first exhaust section and the inner circumferential wall of the first end of the second exhaust section, the spiral blade is arranged along the circumference of the second end of the first exhaust section and surrounds the second end of the first exhaust section, and the extension direction of the spiral blade is consistent with the extension direction of the first exhaust section.

8. The hybrid powder concentration / dispersion separator of claim 6, wherein The discharging part further comprises a plurality of discharging tips, the first end of each discharging tip is connected to the discharging part, and the plurality of discharging tips are arranged along the circumference of the discharging part.

9. The hybrid powder concentration / dispersion separator of claim 8, wherein A plurality of discharging tip groups are arranged along the extension direction of the discharging part, and each discharging tip group comprises a plurality of discharging tips.

10. The hybrid powder concentration / dispersion separator of claim 6, wherein The blocking member is made of an electrically conductive material.

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