Cyclonic separation pre-emptive discharge member and cyclonic separation system

Abstract

The utility model provides a cyclone separation pre -discharge component and cyclone separation system, cyclone separation pre -discharge component is located in the cyclone dust hopper of cyclone separation system and its top with cyclone separation system's cyclone cone section is connected, and it includes the hollow pre -discharge component body and the cyclone type pre -discharge passageway of the upper and lower through of being set up in the peripheral surface of pre -discharge component body. Cyclone separation pre -discharge component of the utility model, through the peripheral surface on setting up the cyclone pre -discharge passageway of slotted type, make the particle that depends on its above cyclone cone section inner wall early discharge into cyclone dust hopper, will not jam cyclone underflow port because of excessive particle accumulation, prolongs the safe and stable operation time of cyclone separation system, improves the separation efficiency of cyclone separation system.

Description

Technical Field

[0001] This utility model belongs to the field of separation equipment technology, specifically relating to cyclone separation pre-discharge components and cyclone separation systems. Background Technology

[0002] A cyclone separator is a device that uses the centrifugal force generated by a rotating airflow to achieve gas-solid or gas-liquid separation. Dust-laden gas enters the cyclone separator's cylinder at a certain velocity along a tangential direction, where it rotates. During rotation, solid particles or liquid droplets are thrown against the cylinder wall by centrifugal force and then fall along the wall under gravity, eventually being discharged through the cyclone ash hopper. The purified gas forms an upward internal vortex in the central part and exits through the cyclone overflow pipe. Cyclone separators are widely used in industries such as chemical, pharmaceutical, mining, cement, and energy. For example, in chemical production, they are used for gas-solid separation, tail gas treatment, and air purification.

[0003] However, the underflow inlet of a cyclone separator is prone to backflow and particle accumulation clogging. These abnormal flows typically reduce the separation efficiency of the cyclone separator, and excessive particles on the inner wall can also cause accumulation and clogging, further hindering separation. Chinese invention patent CN115518780A discloses a cyclone separator with adjustable separation efficiency, including a separator body and a controller. The separator body comprises a cylinder, a cone, and an ash discharge hopper arranged sequentially from top to bottom. An air inlet pipe is located on one side of the cylinder, and an exhaust pipe is located at the top. The air inlet pipe is equipped with a first adjustment mechanism for adjusting the inlet cross-section, a pressure relief pipe, a first flow meter, and a second flow meter. The lower end of the cone is also equipped with a second adjustment mechanism for adjusting pressure. The ash discharge hopper is equipped with a discharge speed monitor that cooperates with the second adjustment mechanism. While this patented technology can quickly address clogging in the ash discharge hopper and provide remedial measures after clogging occurs, it does not fundamentally solve the clogging problem.

[0004] Therefore, developing a cyclone separator pre-discharge component that can solve the problems of airflow backflow and particle accumulation blockage at the underflow port of the cyclone separator system has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art and to provide a cyclone separation pre-discharge component and a cyclone separation system.

[0006] One of the objectives of this utility model is to provide a cyclone separator pre-discharge component, which is disposed in the cyclone ash hopper of the cyclone separator system and whose top is connected to the cyclone cone section of the cyclone separator system. It includes a hollow pre-discharge component body and a cyclone-type pre-discharge channel opened on the periphery of the pre-discharge component body and running vertically through it.

[0007] In a preferred embodiment of this utility model,

[0008] The number of the cyclone pre-discharge channels is two or more, preferably 3 to 15; and / or,

[0009] The width of the cyclone pre-discharge channel is 0.01 to 0.1 times the diameter of the cyclone hopper body, preferably 0.02 to 0.06 times; and / or,

[0010] The pre-discharge component body is coaxially arranged with the cyclone ash hopper.

[0011] In a preferred embodiment of this utility model,

[0012] The angle between the tangent at the intersection of the swirl-type pre-discharge channel and the inner wall of the pre-discharge component and the channel direction of the swirl-type pre-discharge channel is an acute angle, preferably an acute angle not greater than 35°; and / or,

[0013] The angle between the channel direction of the vortex pre-discharge channel and the plane containing the axis of the pre-discharge component body is an acute angle, preferably an acute angle not greater than 45°.

[0014] In a preferred embodiment of this utility model,

[0015] The pre-discharge component body includes an upper cone and a lower cone that are arranged vertically and connected to each other.

[0016] Preferably, the bottom diameter of the upper cone of the pre-discharge component and the top diameter of the lower cone of the pre-discharge component are the same, the bottom diameter of the upper cone of the pre-discharge component is larger than the top diameter of the upper cone of the pre-discharge component, and the top diameter of the lower cone of the pre-discharge component is larger than the bottom diameter of the lower cone of the pre-discharge component;

[0017] More preferably, the channel shape of the vortex pre-discharge channel matches the shape of the pre-discharge component body.

[0018] In a preferred embodiment of this utility model,

[0019] The top diameter of the cone on the pre-discharge component is 0.2 to 0.75 times the diameter of the cyclone ash hopper body; and / or,

[0020] The bottom diameter of the lower cone of the pre-discharge component is 0.3 to 0.8 times the diameter of the main body of the cyclone ash hopper; and / or,

[0021] The cone angle of the upper cone of the pre-discharge component is 5–120°, preferably 45–90°; and / or,

[0022] The cone angle of the lower cone of the pre-discharge component is 3–90°, preferably 15–60°; and / or,

[0023] The height of the cone on the pre-discharge component is 0.1 to 0.6 times the diameter of the cyclone ash hopper body; and / or,

[0024] The height of the lower cone of the pre-discharge component is 0.3 to 1.2 times the diameter of the cyclone ash hopper body; and / or,

[0025] The wall thickness of the upper cone and the lower cone of the pre-discharge component is 0.003 to 0.05 times the diameter of the cyclone ash hopper body.

[0026] In a preferred embodiment of this utility model,

[0027] The boundary line between the swirling pre-discharge channel and the conical circumference of the pre-discharge component is the intersection of a plane and a conical surface or the intersection of a curved surface and a conical surface; and / or,

[0028] The dividing line between the vortex-type pre-discharge channel and the lower cone circumference of the pre-discharge component is the intersection of a plane and a cone surface or the intersection of a curved surface and a cone surface.

[0029] The second objective of this utility model is to provide a cyclone separation system, comprising a cyclone column section, a cyclone cone section, a cyclone ash hopper, and a cyclone separation pre-discharge component as described in the first objective of this utility model, which are connected sequentially from top to bottom; the cyclone column section has a side inlet on its side, a cyclone overflow pipe at the top of the cyclone column section, and an ash hopper discharge port at the bottom of the cyclone ash hopper; the cyclone separation pre-discharge component is disposed inside the cyclone ash hopper, and the top of the pre-discharge component body is connected to the bottom of the cyclone cone section.

[0030] In a preferred embodiment of this utility model, the cyclone column segment is annular; and / or, the cyclone cone segment is an inverted hollow cone; and / or, the upper part of the cyclone ash hopper is annular and the lower part of the cyclone ash hopper is an inverted hollow cone.

[0031] In a preferred embodiment of this utility model, the bottom of the cyclone cone section is provided with a cyclone underflow port, and the top of the pre-discharge component body is connected to the cyclone underflow port.

[0032] In a preferred embodiment of this utility model,

[0033] The cyclone column section, the cyclone cone section, the cyclone ash hopper, and the cyclone separation pre-discharge component are coaxially arranged; and / or,

[0034] The side inlet is tangentially connected to the cyclone column segment; and / or

[0035] The bottom of the pre-discharge component is vertically higher than the bottom surface of the upper part of the cyclone ash hopper.

[0036] Compared with the prior art, the beneficial effects of this utility model are:

[0037] 1. The cyclone separator pre-discharge component of this utility model, through the slit-type cyclone pre-discharge channel on its circumference, allows particles attached to the inner wall of the cyclone cone section above it to be discharged into the cyclone ash hopper in advance, preventing excessive particle accumulation from clogging the cyclone underflow port, extending the safe and stable operation time of the cyclone separation system, and improving the separation efficiency of the cyclone separation system; when multiple cyclone pre-discharge channels are spiral-shaped, the anti-clogging effect is even better, which further helps to improve the separation efficiency.

[0038] 2. The cyclone separator pre-discharge component of this utility model includes an upper cone and a lower cone, which can suppress the backflow of turbulent flow (cyclone separation gas) in the cyclone ash hopper into the cyclone cone section and prevent the cyclone separation effect at the bottom of the cyclone cone section from being disturbed.

[0039] 3. The cyclone separator pre-discharge component of this utility model features multiple flow field enhancement mechanisms that reinforce each other. First, it can suppress turbulent backflow from the cyclone ash hopper into the cyclone cone section of the cyclone separation system, preventing interference with the bottom cyclone separation effect. Second, it can prevent particle accumulation on the inner wall of the cyclone cone section from clogging the cyclone underflow outlet. These two effects can be coupled and promoted; the gas turbulence suppression effect allows particles to be discharged more smoothly and stably, while the particle anti-clogging effect maintains the stability of the fluid flow space size and structure, ensuring normal fluid flow.

[0040] 4. The cyclone separation pre-discharge component of this utility model can be widely used in industrial cyclone separation systems, and has the effect of improving the separation performance of the cyclone separation system and extending the stable operation time of the cyclone separation system. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a cyclone separation system including the cyclone separation pre-discharge component of this utility model;

[0042] Figure 2 This is an external schematic diagram of a cyclone separation system including the cyclone separation pre-discharge component of this utility model;

[0043] Figure 3 This is a partial schematic diagram of the cyclone ash hopper and the cyclone separation pre-discharge component of this utility model;

[0044] Figure 4 This is a partial schematic diagram of the cyclone separator pre-discharge component of this utility model;

[0045] Figure 5This is a partial top view of the horizontal cross-section of the cyclone cone section and the cyclone separation pre-discharge component of this utility model;

[0046] In the diagram, 1-side inlet; 2-cyclone overflow pipe; 3-cyclone column section; 4-cyclone cone section; 5-cyclone underflow outlet; 6-cyclone ash hopper; 7-pre-discharge component body; 8-cyclone ash hopper discharge port; 9-upper cone of pre-discharge component; 10-lower cone of pre-discharge component; 11-cyclone pre-discharge channel; 12-main discharge port of pre-discharge component. Detailed Implementation

[0047] In this utility model, the main body diameter D of the cyclone ash hopper 6 refers to the diameter of the upper ring of the cyclone ash hopper 6.

[0048] In this utility model, the embodiment section involves the parameter "silicon powder particle separation efficiency", which is obtained according to the definition of separation efficiency, that is, the yield of silicon powder particles in the material exiting the cyclone ash hopper 6, specifically the ratio of the weight of silicon powder particles at the outlet (cyclone ash hopper discharge port 8) to the inlet (side inlet 1).

[0049] The present invention will now be described in further detail with reference to the accompanying drawings:

[0050] like Figures 1-5 As shown, this utility model provides a cyclone separator pre-discharge component, which is disposed within the cyclone ash hopper 6 of a cyclone separator system, and the top of the cyclone separator pre-discharge component is connected to the cyclone cone section 4 of the cyclone separator system. The cyclone separator pre-discharge component includes a hollow pre-discharge component body 7 and a cyclone-type pre-discharge channel 11 that is opened on the circumference of the pre-discharge component body 7 and runs vertically through it. Explanatoryly, the pre-discharge component body 7 is a vertically through structure, which does not have a top surface and a bottom surface, but only a circumference surface; "vertically through cyclone-type pre-discharge channel 11" specifically refers to the channel direction of the cyclone-type pre-discharge channel 11. As mentioned above, in specific implementation, the cyclone separator pre-discharge component needs to be installed in the cyclone separator system. Those skilled in the art know that the cyclone separator system includes a cyclone cone section 4 and a cyclone ash hopper 6 arranged vertically and connected to each other. Specifically, the top of the pre-discharge component body 7 is connected to the bottom of the cyclone cone section 4, and the other parts of the pre-discharge component body 7 extend downwards but do not extend to the bottom of the cyclone ash hopper 6, that is, the bottom of the pre-discharge component body 7 is suspended. Therefore, the hollow interior of the pre-discharge component body 7 is connected upwards to the cyclone cone section 4 and downwards to the cyclone ash hopper 6; while the cyclone-type pre-discharge channel 11 connects the hollow interior of the pre-discharge component body 7 outwards to the cyclone ash hopper 6. Preferably, the bottom of the cyclone cone section 4 is provided with a cyclone underflow port 5, so the top of the pre-discharge component body 7 is connected to the cyclone underflow port 5.

[0051] The cyclone separator pre-discharge component of this invention features a slit-type cyclone pre-discharge channel 11 on the circumferential surface of the pre-discharge component body 7. This allows particles adhering to the inner wall of the cyclone cone section 4 above it to be pre-discharged into the cyclone ash hopper 6, preventing excessive particle accumulation from clogging the cyclone underflow port 5 and extending the safe and stable operation time of the cyclone separation system. Specifically, under centrifugal force, particles tend to move towards the inner wall of the cyclone cone section 4, and the cyclone pre-discharge channel 11 on the pre-discharge component allows some particles at the bottom of the cyclone cone section 4 (the area with higher particle concentration) to be discharged into the cyclone ash hopper 6. In other words, some particles that originally needed to be discharged entirely from the cyclone underflow port 5 can now be pre-discharged through the cyclone pre-discharge channel 11, effectively reducing the clogging rate and fundamentally solving the clogging problem of the cyclone underflow port 5, thus maintaining the operational stability and separation efficiency stability of the cyclone separation system. It should be noted that the aforementioned "hollow pre-discharge component body 7" means that other particles that are not pre-discharged enter the cyclone ash hopper 6 through the hollow part of the pre-discharge component body 7. In addition, the cyclone separation pre-discharge component of this invention also has a flow rectification function for the vortex flow field at the bottom of the cyclone separation system (cyclone underflow port 5). Specifically, it can weaken the backflow of air in the central negative pressure zone at this location, making the fluid flow at the cyclone underflow port 5 more regular, reducing irregular vortices and turbulence, and further improving separation efficiency.

[0052] In a preferred embodiment of this utility model, the number of cyclone pre-discharge channels 11 is two or more, preferably 3 to 15; and / or, the pre-discharge component body 7 is coaxially arranged with the cyclone ash hopper 6; and / or, the channel width d of the cyclone pre-discharge channel 11 is 0.01 to 0.1 times the diameter D of the main body of the cyclone ash hopper 6, preferably 0.02 to 0.06 times. Having two or more cyclone pre-discharge channels 11 can further increase the pre-discharge volume of deposits attached to the inner wall of the cyclone cone section 4, further preventing the deposits from clogging the cyclone underflow port 5 at the bottom of the cyclone cone section 4. The coaxial arrangement of the pre-discharge component body 7 with the cyclone ash hopper 6 makes the arrangement of the two or more cyclone pre-discharge channels 11 more uniform, which is more conducive to the uniform discharge of deposits from the inner wall of the cyclone cone section 4. Figure 4 In this design, there are six swirl-type pre-discharge channels 11, but this is merely illustrative and does not constitute a limitation on the present invention. It should be noted that... Figure 4 The horizontal cross-section in the figure is the cross-section at the maximum circumference of the cyclone separator pre-discharge component.

[0053] In a preferred embodiment of this utility model, the angle γ between the vertical plane containing the tangent at the intersection of the cyclone pre-discharge channel 11 and the inner wall of the pre-discharge component body 7, and the channel direction of the cyclone pre-discharge channel 11, is an acute angle, preferably not greater than 35°. Within this range, the channel direction of the cyclone pre-discharge channel 11 is relatively close to the cyclone direction inside the cyclone separation system, and the fluid is less likely to undergo drastic changes in flow direction; and / or, the angle δ between the channel direction of the cyclone pre-discharge channel 11 and the plane containing the axis of the pre-discharge component body 7 is an acute angle, preferably not greater than 45°. Within this range, the channel direction of the cyclone pre-discharge channel 11 is relatively close to the cyclone direction inside the cyclone separation system, and the fluid is less likely to undergo drastic changes in flow direction. It should be noted that the "plane containing the axis of the pre-discharge component body 7" here specifically refers to the plane formed by the Y-axis and Z-axis in a three-dimensional coordinate system. Figure 4 The illustration shows an embodiment in which the angle γ between the plane containing the tangent at the intersection of the vortex pre-discharge channel 11 and the inner wall of the pre-discharge component body 7 and the channel direction of the vortex pre-discharge channel 11 is an acute angle, but this is only an illustrative example. Figure 5 The illustration shows an embodiment in which the angle δ between the channel direction of the vortex pre-discharge channel 11 and the plane containing the axis of the pre-discharge component body 7 is an acute angle, but this is only an illustrative example.

[0054] In a preferred embodiment of this utility model, the pre-discharge component body 7 includes an upper pre-discharge component cone 9 and a lower pre-discharge component cone 10 arranged vertically and connected to each other. Preferably, the bottom diameter of the upper pre-discharge component cone 9 and the top diameter of the lower pre-discharge component cone 10 are the same, the bottom diameter of the upper pre-discharge component cone 9 is larger than the top diameter L1, and the top diameter of the lower pre-discharge component cone 10 is larger than the bottom diameter L2. In other words, the upper pre-discharge component cone 9 is a cone that is narrower at the top and wider at the bottom, and the lower pre-discharge component cone 10 is a cone that is wider at the top and narrower at the bottom. More preferably, the channel shape of the swirling pre-discharge channel 11 matches the shape of the pre-discharge component body 7. Explanatoryly, the channel shape of the swirling pre-discharge channel 11 refers to its extended shape along its channel direction. When the pre-discharge component body 7 is annular, the channel shape of the vortex pre-discharge channel 11 is a vertically downward slit, and its channel length is equal to the height of the pre-discharge component body 7. When the pre-discharge component body 7 includes an upper pre-discharge component cone 9 and a lower pre-discharge component cone 10 that are arranged vertically and connected to each other, the channel shape of the vortex pre-discharge channel 11 is a slit that first extends outward and downward at an angle, and then extends inward and downward at an angle. Therefore, its total channel length is greater than the total channel length when the pre-discharge component body 7 is annular.

[0055] In a preferred embodiment of this utility model, the top diameter L1 of the upper cone 9 of the pre-discharge component is 0.2 to 0.75 times the main body diameter D of the cyclone hopper 6; and / or, the bottom diameter L2 of the lower cone 10 of the pre-discharge component is 0.3 to 0.8 times the main body diameter D of the cyclone hopper 6; and / or, the cone angle β of the upper cone 9 of the pre-discharge component is 5 to 120°, preferably 45 to 90°; and / or, the cone angle β of the lower cone 10 of the pre-discharge component is... α is 3–90°, preferably 15–60°; and / or, the height h1 of the upper cone 9 of the pre-discharge component is 0.1–0.6 times the diameter D of the main body of the cyclone hopper 6; and / or, the height h2 of the lower cone 10 of the pre-discharge component is 0.3–1.2 times the diameter D of the main body of the cyclone hopper 6; and / or, the wall thickness of the upper cone 9 and the lower cone 10 of the pre-discharge component is 0.003–0.05 times the diameter D of the main body of the cyclone hopper 6. Preferably, the boundary line between the cyclone pre-discharge channel 11 and the circumference of the upper cone 9 of the pre-discharge component is the intersection of a plane and a cone surface or the intersection of a curved surface and a cone surface; and / or, the boundary line between the cyclone pre-discharge channel 11 and the circumference of the lower cone 10 of the pre-discharge component is the intersection of a plane and a cone surface or the intersection of a curved surface and a cone surface. This preferred embodiment defines the geometry of the swirl-type pre-discharge channel 11, such as... Figure 5 As shown, the boundary line between the vortex-type pre-discharge channel 11 and the circumferential surface of the upper cone 9 of the pre-discharge component is the intersection line formed by the intersection of a plane and a cone surface. Similarly, the boundary line between the vortex-type pre-discharge channel 11 and the circumferential surface of the lower cone 10 of the pre-discharge component is also the intersection line formed by the intersection of a plane and a cone surface. However, this is merely an illustrative example; the boundary line between the vortex-type pre-discharge channel 11 and the circumferential surface of the upper cone 9 of the pre-discharge component can also be the intersection line formed by the intersection of a curved surface and a cone surface, and vice versa. More preferably, the bottom of the lower cone 10 of the pre-discharge component is provided with a main discharge port 12, the diameter of which, L2, is 0.3 to 0.8 times the main body diameter D of the cyclone ash hopper 6. The aforementioned "other particles that are not pre-discharged will enter the cyclone ash hopper 6 through the hollow part of the pre-discharge component body 7" specifically means that after passing through the hollow part of the pre-discharge component body 7, they enter the cyclone ash hopper 6 through the main discharge port 12 of the pre-discharge component.

[0056] This utility model also provides a cyclone separation system, including a cyclone column section 3, a cyclone cone section 4, a cyclone ash hopper 6, and the aforementioned cyclone separation pre-discharge component connected sequentially from top to bottom; the cyclone column section 3 has a side inlet 1 on its side, a cyclone overflow pipe 2 on its top, and a cyclone ash hopper discharge port 8 at its bottom; the cyclone separation pre-discharge component is disposed inside the cyclone ash hopper 6, and the top of the pre-discharge component body 7 is connected to the bottom of the cyclone cone section 4. Explained, the connection between the top of the pre-discharge component body 7 and the cyclone cone section 4, and the connection between the cyclone ash hopper 6 and the cyclone cone section 4, are on the same horizontal plane. In other words, the top of the pre-discharge component body 7, the top of the cyclone ash hopper 6, the bottom of the cyclone cone section 4, and the cyclone underflow port 5 are on the same horizontal plane.

[0057] In a preferred embodiment of this utility model, the cyclone column segment 3 is annular; and / or, the cyclone cone segment 4 is an inverted hollow cone; and / or, the upper part of the cyclone hopper 6 is annular and the lower part of the cyclone hopper 6 is an inverted hollow cone. Preferably, the cyclone column segment 3, the cyclone cone segment 4, the cyclone hopper 6, and the cyclone separation pre-discharge component are coaxially arranged; and / or, the side inlet 1 is tangentially connected to the cyclone column segment 3; and / or, the bottom of the pre-discharge component body 7 is vertically higher than the bottom surface of the upper part of the cyclone hopper 6.

[0058] Example 1

[0059] The cyclone separation system includes, from top to bottom, a cyclone column section 3, a cyclone cone section 4, a cyclone ash hopper 6, and the aforementioned cyclone separation pre-discharge component. The cyclone column section 3 has a side inlet 1 on its side and a cyclone overflow pipe 2 at its top. The cyclone ash hopper 6 has a cyclone ash hopper discharge port 8 at its bottom. The cyclone separation pre-discharge component is located inside the cyclone ash hopper 6, and the top of the pre-discharge component body 7 is connected to the bottom of the cyclone cone section 4. The cyclone separation pre-discharge component includes a hollow pre-discharge component body 7 and a cyclone-type pre-discharge channel 11 formed on the wall of the pre-discharge component body 7 and extending vertically. The pre-discharge component body 7 and the cyclone ash hopper 6 are coaxially arranged. The cyclone column section 3 is annular; the cyclone cone section 4 is an inverted hollow cone; the upper part of the cyclone hopper 6 is annular, and the lower part of the cyclone hopper 6 is an inverted hollow cone. The cyclone column section 3, the cyclone cone section 4, the cyclone hopper 6, and the cyclone separation pre-discharge component are coaxially arranged; the side inlet 1 is tangentially connected to the cyclone column section 3; the bottom of the pre-discharge component body 7 is vertically higher than the bottom surface of the upper part of the cyclone hopper 6.

[0060] The pre-discharge component body 7 includes an upper pre-discharge component cone 9 and a lower pre-discharge component cone 10 that are arranged vertically and connected to each other; the bottom diameter of the upper pre-discharge component cone 9 and the top diameter of the lower pre-discharge component cone 10 are the same, the bottom diameter of the upper pre-discharge component cone 9 is larger than the top diameter of the upper pre-discharge component cone 9, and the top diameter of the lower pre-discharge component cone 10 is larger than the bottom diameter of the lower pre-discharge component cone 10; the channel shape of the vortex pre-discharge channel 11 matches the shape of the pre-discharge component body 7. The top diameter L1 of the upper cone 9 of the pre-discharge component is 0.67 times the main body diameter D of the cyclone ash hopper 6; the bottom of the lower cone 10 of the pre-discharge component is provided with a main discharge port 12, the diameter L2 of which is 0.67 times the main body diameter D of the cyclone ash hopper 6; the cone angle α of the lower cone 10 of the pre-discharge component is 45°; the cone angle β of the upper cone 9 of the pre-discharge component is 75°; the height h1 of the upper cone 9 of the pre-discharge component is 0.15 times the main body diameter D of the cyclone ash hopper 6; the height h2 of the lower cone 10 of the pre-discharge component is 0.5 times the main body diameter D of the cyclone ash hopper 6; the wall thickness of the upper cone 9 and the lower cone 10 of the pre-discharge component is equal to the main body diameter D of the cyclone ash hopper 6. The width d of the cyclone pre-discharge channel 11 is 0.034 times the diameter D of the cyclone ash hopper 6; the angle γ between the channel direction of the cyclone pre-discharge channel 11 and the tangent at the intersection with the inner wall of the pre-discharge component body 7 is 15°; the angle δ between the channel direction of the cyclone pre-discharge channel 11 and the axis of the pre-discharge component body 7 is 30°; the boundary line between the cyclone pre-discharge channel 11 and the circumference of the upper cone 9 of the pre-discharge component is the intersection of the plane and the cone surface; the boundary line between the cyclone pre-discharge channel 11 and the circumference of the lower cone 10 of the pre-discharge component is the intersection of the plane and the cone surface.

[0061] The aforementioned cyclone separation system is applied to silicon powder recovery from a polycrystalline silicon cold hydrogenation fluidized bed reactor, specifically including the following steps:

[0062] S1: In the polycrystalline silicon cold hydrogenation fluidized bed reactor, the silicon-containing gas to be separated enters the cyclone column section 3 through the side inlet 1, forming a swirling airflow; the swirling airflow then enters the cyclone cone section 4 from the cyclone column section 3. The flow rate of the silicon-containing gas to be separated is 325 m³ / h. 3 / h.

[0063] S2: Dust in the swirling airflow moves toward the inner wall of the cyclone cone section 4 and downwards to the pre-discharge component body 7, while gas in the swirling airflow moves upwards and is discharged through the cyclone overflow pipe 2.

[0064] S3: Some dust is discharged from the cyclone pre-discharge channel 11 into the cyclone ash hopper 6, while other dust moves downward through other parts of the pre-discharge component body 7 and is discharged from the main discharge port 12 of the pre-discharge component into the cyclone ash hopper 6.

[0065] Testing showed that the silicon powder particle separation efficiency was 99.5%. The cyclone separator maintained stable operation during the 6-month maintenance cycle.

[0066] Example 2

[0067] This embodiment is basically the same as Embodiment 1, except that the angle γ between the tangent at the intersection of the cyclone pre-discharge channel 11 and the inner wall of the pre-discharge component body 7 and the channel direction of the cyclone pre-discharge channel 11 is 30°. When applied to silicon powder recovery in a polycrystalline silicon cold hydrogenated fluidized bed reactor, the silicon powder particle separation efficiency was found to be 99.2%. During a 6-month maintenance cycle, the cyclone separator maintained stable operation.

[0068] Example 3

[0069] This embodiment is basically the same as Embodiment 1, except that the angle δ between the channel direction of the cyclone pre-discharge channel 11 and the plane containing the axis of the pre-discharge component body 7 is 5°. When applied to a polycrystalline silicon cold hydrogenated fluidized bed reactor for silicon powder recovery, the silicon powder particle separation efficiency was tested to be 98.9%. During a 6-month maintenance cycle, the cyclone separator maintained stable operation.

[0070] Example 4

[0071] This embodiment is basically the same as Embodiment 1, except that: the top diameter L1 of the upper cone 9 of the pre-discharge component is 0.45 times the main body diameter D of the cyclone hopper 6; the bottom of the lower cone 10 of the pre-discharge component is provided with the main discharge port 12 of the pre-discharge component, the diameter L2 of which is 0.5 times the main body diameter D of the cyclone hopper 6. After applying it to the silicon powder recovery of a polycrystalline silicon cold hydrogenated fluidized bed reactor, the silicon powder particle separation efficiency was tested to be 98.5%. During the 6-month maintenance cycle, the cyclone separator maintained stable operation.

[0072] Example 5

[0073] This embodiment is basically the same as Embodiment 1, except that the cone angle α of the lower cone 10 of the pre-discharge component is 60°, and the cone angle β of the upper cone 9 of the pre-discharge component is 120°. When applied to silicon powder recovery in a polycrystalline silicon cold hydrogenated fluidized bed reactor, the silicon powder particle separation efficiency was tested to be 98.7%. During the 6-month maintenance cycle, the cyclone separator maintained stable operation.

[0074] Comparative Example 1

[0075] This embodiment is basically the same as Embodiment 1, except that the cyclone separation pre-discharge component is not installed in the cyclone separation system. When applied to silicon powder recovery in a polycrystalline silicon cold hydrogenated fluidized bed reactor, the initial silicon powder particle separation efficiency was 98.3%. After one week of operation, the separation efficiency gradually decreased to below 50%; blockage was found at the 6-month maintenance cycle.

[0076] Comparative Example 2

[0077] This embodiment is basically the same as Embodiment 1, except that the pre-discharge component body 7 does not have a cyclone pre-discharge channel 11. When applied to a polycrystalline silicon cold hydrogenated fluidized bed reactor for silicon powder recovery, the silicon powder particle separation efficiency was tested to be 98.5%. After one month of operation, the separation efficiency gradually decreased to below 50%. Blockage was found during the 6-month maintenance cycle.

[0078] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0079] In the description of this utility model, unless otherwise stated, the terms "upper", "lower", "left", "right", "inner", "outer", etc., 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 this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0080] The above technical solutions are merely embodiments of this utility model. For those skilled in the art, based on the principles disclosed in this utility model, it is easy to make various types of improvements or modifications, and not limited to the technical solutions described in the specific embodiments above. Therefore, the foregoing descriptions are only preferred and not restrictive.

Claims

1. A cyclone separator pre-discharge component, disposed within the cyclone ash hopper of a cyclone separator system and with its top connected to the cyclone cone section of the cyclone separator system, characterized in that, It includes a hollow pre-discharge component body and a vortex-type pre-discharge channel opened on the periphery of the pre-discharge component body and running vertically through it.

2. The cyclone separator pre-discharge component according to claim 1, characterized in that, The number of the cyclone pre-discharge channels is two or more; and / or, The width of the cyclone pre-discharge channel is 0.01 to 0.1 times the diameter of the cyclone hopper body; and / or, The pre-discharge component body is coaxially arranged with the cyclone ash hopper.

3. The cyclone separator pre-discharge component according to claim 2, characterized in that, The number of the cyclone pre-discharge channels is 3 to 15; and / or, The width of the cyclone pre-discharge channel is 0.02 to 0.06 times the diameter of the cyclone ash hopper body.

4. The cyclone separator pre-discharge component according to claim 2, characterized in that, The angle between the tangent at the intersection of the swirl-type pre-discharge channel and the inner wall of the pre-discharge component and the channel direction of the swirl-type pre-discharge channel is an acute angle; and / or, The angle between the channel direction of the vortex pre-discharge channel and the plane containing the axis of the pre-discharge component body is an acute angle.

5. The cyclone separator pre-discharge component according to claim 4, characterized in that, The angle between the tangent at the intersection of the swirl-type pre-discharge channel and the inner wall of the pre-discharge component and the channel direction of the swirl-type pre-discharge channel is an acute angle not greater than 35°; and / or, The angle between the channel direction of the vortex pre-discharge channel and the plane containing the axis of the pre-discharge component body is an acute angle not greater than 45°.

6. The cyclone separator pre-discharge component according to any one of claims 1 to 5, characterized in that, The pre-discharge component body includes an upper cone and a lower cone that are arranged vertically and connected to each other.

7. The cyclone separator pre-discharge component according to claim 6, characterized in that, The bottom diameter of the upper cone of the pre-discharge component is the same as the top diameter of the lower cone of the pre-discharge component. The bottom diameter of the upper cone of the pre-discharge component is larger than the top diameter of the upper cone of the pre-discharge component, and the top diameter of the lower cone of the pre-discharge component is larger than the bottom diameter of the lower cone of the pre-discharge component.

8. The cyclone separator pre-discharge component according to claim 7, characterized in that, The shape of the vortex pre-discharge channel matches the shape of the pre-discharge component body.

9. The cyclone separator pre-discharge component according to claim 6, characterized in that, The top diameter of the cone on the pre-discharge component is 0.2 to 0.75 times the diameter of the cyclone hopper body; and / or, The bottom diameter of the lower cone of the pre-discharge component is 0.3 to 0.8 times the diameter of the main body of the cyclone ash hopper; and / or, The cone angle of the upper cone of the pre-discharge component is 5~120°; and / or, The cone angle of the lower cone of the pre-discharge component is 3~90°; and / or, The height of the cone on the pre-discharge component is 0.1 to 0.6 times the diameter of the cyclone ash hopper body; and / or, The height of the lower cone of the pre-discharge component is 0.3 to 1.2 times the diameter of the cyclone ash hopper body; and / or, The wall thickness of the upper cone and the lower cone of the pre-discharge component is 0.003 to 0.05 times the diameter of the cyclone ash hopper body.

10. The cyclone separator pre-discharge component according to claim 9, characterized in that, The cone angle of the upper cone of the pre-discharge component is 45~90°; and / or, The cone angle of the lower cone of the pre-discharge component is 15~60°.

11. The cyclone separator pre-discharge component according to claim 1, characterized in that, The boundary line between the swirling pre-discharge channel and the conical circumference of the pre-discharge component is the intersection of a plane and a conical surface or the intersection of a curved surface and a conical surface; and / or, The dividing line between the vortex-type pre-discharge channel and the lower cone circumference of the pre-discharge component is the intersection of a plane and a cone surface or the intersection of a curved surface and a cone surface.

12. A cyclone separation system, characterized in that, The device includes, from top to bottom, a cyclone column section, a cyclone cone section, a cyclone ash hopper, and a cyclone separation pre-discharge component as described in any one of claims 1 to 11; the cyclone column section has a side inlet on its side, a cyclone overflow pipe at the top of the cyclone column section, and an ash hopper discharge port at the bottom of the cyclone ash hopper; the cyclone separation pre-discharge component is disposed inside the cyclone ash hopper, and the top of the pre-discharge component body is connected to the bottom of the cyclone cone section.

13. The cyclone separation system according to claim 12, characterized in that, The cyclone column segment is annular; and / or, The cyclone cone segment is an inverted hollow cone; and / or, The upper part of the cyclone ash hopper is circular, and the lower part of the cyclone ash hopper is an inverted hollow cone.

14. The cyclone separation system according to claim 12, characterized in that, The bottom of the cyclone cone section is provided with a cyclone underflow port, and the top of the pre-discharge component body is connected to the cyclone underflow port.

15. The cyclone separation system according to claim 12, characterized in that, The cyclone column section, the cyclone cone section, the cyclone ash hopper, and the cyclone separation pre-discharge component are coaxially arranged; and / or, The side inlet is tangentially connected to the cyclone column segment; and / or The bottom of the pre-discharge component is vertically higher than the bottom surface of the upper part of the cyclone ash hopper.

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