Double-sleeve fine-selection cyclone separation equipment

Abstract

An air inlet (2) is tangentially formed in one side of the outer wall of the top of a spiral air inlet pipe (1), and the bottom of the spiral air inlet pipe (1) is connected with a cone (3); the bottom of the cone (3) is connected with an ash hopper (4), an air outlet (5) is formed in the middle of the upper end of the spiral air inlet pipe (1), an overflow cylinder (7) is communicated with the inner top of the spiral air inlet pipe (1), namely the lower side of the air outlet (5), and the lower end of the overflow cylinder (7) is communicated with an upturning cylinder (9) through an inner cylinder (8); a rotational flow cover (11) is arranged on the lower portion in the cone (3), namely the lower side of the lower port of the upturning cylinder (9), a synchronous impeller (13) is arranged in the lower port of the upturning cylinder (9), and the rotational flow cover (11) and the synchronous impeller (13) are coaxially connected through a connecting shaft rod (12). Solid particles in air flow are separated on line step by step through the outer rotational flow annular settling space and the inner rotational flow pressure reduction ascending space, backmixing is greatly restrained, rotational flow multi-link continuous separation is achieved, and ash deposition is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of centrifugal device or centrifuge for realizing physical or chemical process and the equipment of applying free cyclone, especially relates to an improved cyclone separation equipment with inner and outer double-layer cylinder structure. BACKGROUND

[0002] Cyclone separation equipment is a kind of equipment widely used in industry for separating gas-solid system or liquid-solid system. The working principle is to make solid particles or liquid drops with larger inertia centrifugal force be thrown to the outer wall surface and separated by the rotational motion caused by tangential introduction of gas flow. Since the centrifugal force of particles is much larger than gravity and inertia force, solid particles in gas flow are separated, and particles are thrown to the wall surface by the centrifugal force of gas flow to realize separation. The gas flow carrying solid particles enters the equipment body by the flow rate and pressure transformation of the working gas flow in the equipment, and after the solid particles in the gas flow settle, the gas is extracted out of the separator by the upper negative pressure system, so as to achieve the effect of separating solid particles in gas flow.

[0003] Traditional and general cyclone separation equipment is mostly single-layer structure, and after gas centrifugation is completed, part of dust is easily mixed and discharged with gas at the gas outlet. In the application process, cyclone separation equipment is continuously developed and improved. Among them:

[0004] Chinese invention patent application CN201810390818.7 discloses a double-layer cyclone separator, which comprises an outer shell body provided with an air inlet, an air outlet and an oil outlet, and an inner shell body coaxially arranged with the outer shell body and forming a first separation cavity between the inner shell body and the outer shell body. The inner shell body surrounds a second separation cavity. The air inlet is in communication with the first separation cavity and the second separation cavity respectively.

[0005] Chinese invention patent application CN201210420665.9 discloses a cyclone separator, which comprises a vacuum assembly, an inner cylinder and an outer cylinder arranged outside the inner cylinder, a closed vacuum cavity is formed between the inner cylinder and the outer cylinder, the size of the inner cavity of the inner cylinder at the upper part is larger than that at the lower part. An inlet assembly is in communication with the upper part of the inner cavity of the inner cylinder, and is used for inputting the coal gas to be separated into the inner cavity. An air outlet assembly is in communication with the top or upper part of the inner cavity of the inner cylinder, and is used for outputting the separated coal gas. An ash discharge assembly is in communication with the lower part of the inner cavity of the inner cylinder, and is used for discharging the separated coal ash.

[0006] Chinese patent application 202010441437.4 discloses a double-shell high-efficiency cyclone separator, comprising a cyclone volute inlet (1), a cyclone outlet (2), a top plate (3), a cylinder assembly (4), an outer shell (5), an inner cone assembly (6), an outer intermediate hopper (7), an inner intermediate hopper (8), and a vortex stabilizing double cone (9). The cyclone volute inlet is in tangential communication with the upper cylinder tower joint. The interface flow guide is provided with an upright guide vane. The outer shell is connected to the upper cylinder tower joint and the outer intermediate hopper. The inner cone assembly is arranged in the outer shell, and the outer shell forms a first annular gap with the inner cone assembly and the cylinder assembly. The inner intermediate hopper is arranged in the outer intermediate hopper, and a second annular gap is formed between them. The first annular gap and the second annular gap are connected to form an annular settling space.

[0007] Chinese patent application 202323663448.5 provides a double-layer filtering cyclone separator, comprising a separator body provided with an air inlet and an air outlet, a filtering channel being formed between the air inlet and the air outlet; the cyclone separator further comprises a filtering assembly arranged in the filtering channel to filter the gas in the separator body; the filtering assembly comprises a first filtering member and a second filtering member, the second filtering member is arranged around the filtering channel, and the first filtering member is located between the separator body and the second filtering member, and the first filtering member is covered by the second filtering member in at least one direction of the circumferential direction and the radial direction of the separator body, so that the gas in the separator body passes through the first filtering member and then passes through the second filtering member.

[0008] Chinese patent application 202322716772.2 discloses a double-layer cone high-efficiency cyclone separator with anti-reverse mixing, which relates to the technical field of cyclone separators. The cyclone separator comprises a vertical tank body, a funnel tank body arranged at the bottom of the vertical tank body, an air outlet extending into the interior of the vertical tank body arranged at the top of the vertical tank body, an air inlet extending into the interior of the vertical tank body arranged on the outer surface of the vertical tank body, and an anti-mixing separation unit arranged in the interior of the vertical tank body. The anti-mixing separation unit can rotate and centrifuge the wind entering through the air inlet, separate the dust in the gas, isolate the air outlet channel through the anti-mixing hopper, prevent the separated dust from being mixed and brought back through the air outlet, and filter the dust in the gas, avoiding the situation of incomplete separation. In addition, the scraping baffle can clean the filter screen in real time, improving the practicality of the device.

[0009] Chinese patent application 202410325728.5 provides a double-layer cyclone separator, including a separation cylinder, a partition plate is arranged in the separation cylinder, the side wall of the partition plate is connected with the inner wall of the cylinder through circumferentially arranged connecting blocks, and the inside of the separation cylinder is sequentially separated into a first separation layer and a second separation layer from top to bottom; a first cyclone rod is rotatably arranged in the first separation layer, and a feed pipe and a first discharge pipe which are connected with the outside are arranged above the first cyclone rod; a second cyclone rod is rotatably arranged in the second separation layer, and a second discharge pipe which is connected with the outside is arranged above the second cyclone rod; the material first enters the first separation layer, is separated for the first time through the rotation of the first cyclone rod, then enters the second separation layer, and the rotation speed of the second cyclone rod is lower than that of the first cyclone rod, so that the material can be separated for the second time through the rotation of the second cyclone rod.

[0010] However, the existing single-layer or double-layer cyclone separator has the problems that the negative pressure of the gas flow outlet is difficult to control, the working gas flow and the internal gas pressure are unstable, when the gas flow carries solid particles, on the one hand, the structure of the inner wall of the separator is damaged due to excessive impact force, or on the other hand, the separation effect is poor due to too small gas flow, which restricts the reduction of the gas separation efficiency, affects the overall working efficiency, and also causes the internal part of the separator to need to be frequently maintained and replaced, thereby bringing great inconvenience to production. Practical new type content

[0011] The utility model provides a double sleeve fine selection cyclone separation equipment, overcome the defect that the equipment inside is damaged in above prior art, through setting up double sleeve structure and auxiliary outlet gas flow adjusting mechanism, control equipment internal pressure drop, aim at improving present technical problem.

[0012] Therefore, the utility model discloses a spiral air inlet pipe, an air inlet, a cone, an ash bucket, an air outlet, an overflow cylinder, an inner cylinder and an upside-down cylinder. The air inlet is tangentially installed on one side of the outer wall of the top of the spiral air inlet pipe, and the bottom of the cone is connected with the ash bucket. The upper end of the spiral air inlet pipe is connected with the air outlet, and the overflow cylinder is installed in the spiral air inlet pipe and connected with the upside-down cylinder through the inner cylinder. A cyclone cover is arranged on the lower part of the cone and the lower end of the upside-down cylinder, and a synchronous impeller is arranged in the lower end of the upside-down cylinder. The cyclone cover and the synchronous impeller are coaxially connected through a connecting rod. The inner diameters of the air inlet and the air outlet are the same.

[0013] The overflow cylinder penetrates the top plate and is inserted into the air outlet from a local top opening on one side, and the overflow cylinder penetrates the top plate and is connected with a bypass pipe and the top edge of the spiral air inlet pipe on the same side through a local top opening on the other side. An air outlet adjusting valve is installed on the air outlet. The air outlet is connected with a drainage fan. Further, a gas distribution and maintenance valve is installed on the bypass pipe.

[0014] The blades of the cyclone cover or the synchronous impeller are unclosed Mobius blades, and the front end and the rear end of the blade are inclined and turned over on the same side.

[0015] Further, to achieve the above-mentioned purpose, the utility model is provided with:

[0016] Especially, the spiral air inlet pipe is vertically and coaxially arranged with the overflow cylinder, the inner cylinder and the upturned cylinder.

[0017] Especially, the inner diameters of the overflow cylinder, the inner cylinder and the upturned cylinder are sequentially decreased. Especially, the inner diameter of the overflow cylinder is 50-75% of the inner diameter of the spiral air inlet pipe, and the inner diameter of the upturned cylinder is 85-150% of the inner diameter of the bottom port of the cone or the inner diameter of the hopper.

[0018] Especially, the lower port of the upturned cylinder is located on the midpoint of the central axis of the cone.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] By arranging the overhanging inner cylinder structure, planning the outer cyclone-inner cyclone air flow path, prolonging and stabilizing the cyclone separation process, arranging the cyclone cover-synchronous impeller connecting shaft mechanism on the low end cyclone turning back fulcrum of the inner and outer cylinders, the spiral air flow is not only stabilized, but also can utilize the outer cyclone annular sedimentation space and the inner cyclone pressure reduction and upward space to separate the solid particles in the air flow step by step, greatly suppresses the generation of back mixing, realizes the continuous separation of the cyclone multi-link, and also more effectively prevents the blockage and the generation of dust accumulation; in combination with the opening degree adjustment and air distribution of the top bypass pipe and the drainage fan, the structure is improved in a simple manner, the pressure drop is obviously adjustable during work, the cyclone density is controlled, and the air flow cleaning and maintenance functions of the equipment are enhanced, the control means of the equipment is enriched, the separated dust is prevented from being mixed and taken out through the air outlet, and the separation efficiency of the cyclone pipe is improved. The separation efficiency of micron and submicron dust can be greatly improved. The separation efficiency of particles greater than 3 microns can reach 99.9%, and the separation efficiency of particles less than 3 microns can reach 98%. The separation is suitable for different materials. The separation efficiency is improved by 2.5-4.3%, and the resistance is reduced by 6.3-11.5%. The material separation is more detailed. BRIEF DESCRIPTION OF DRAWINGS

[0021] The following drawings are schematic and should not be understood as any limitation on the utility model. By referring to the following drawings, the reader can help understand the embodiments of the utility model and further understand the advantages and technical features of the utility model.

[0022] Figure 1 It is a structural schematic view of the embodiment 1 of the utility model.

[0023] Figure 2 It is a structural schematic view of the cyclone cover or the synchronous impeller in the embodiment 1 of the utility model.

[0024] The reference signs include:

[0025] 1 - Spiral inlet tube, 2 - Inlet port, 3 - Cone, 4 - Ash bin, 5 - Outlet port, 6 - Outlet damper, 7 - Overflow cylinder, 8 - Inner cylinder, 9 - Upturned cylinder, 10 - Lower support, 11 - Swirl cone, 12 - Connecting shaft, 13 - Synchronous impeller, 14 - Upper support, 15 - Top bypass, 16 - Air distribution maintenance valve, 17 - Induced draft fan. DETAILED DESCRIPTION

[0026] It should be noted that the terms "comprises" and "comprising" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, system, product or apparatus that comprises a list of steps or units does not necessarily comprise only those steps or units but can include other not expressly listed steps or units. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, specify relative positions or orientations based on the positions or orientations shown in the drawings, or the positions or orientations in which the utility model product is usually placed during use, and are only used to facilitate the description of the utility model and simplify the description, and do not indicate or imply 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 a limitation on the utility model. The terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. The terms "provided", "mounted", "connected", "linked", and the like should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. In case of conflict, the definitions in this specification prevail.

[0028] The cyclone separator has the advantages of simple structure, no excessive moving parts, high separation efficiency, convenient maintenance, and long-term stable operation under harsh working conditions such as high temperature and high pressure. However, the internal movement of the cyclone separator is extremely complex, belonging to two-phase or three-phase three-dimensional turbulent flow, making its theoretical research very difficult, and its accurate movement law cannot be fully grasped so far. Despite this, research on cyclone separators continues at home and abroad, and research methods and means keep pace with the development of science and technology.

[0029] The separation effect of the cyclone separator: under the design pressure and gas volume conditions, solid particles ≥10 μm can be removed. At the working point, the separation efficiency is 99%, and within the range of ±15% of the working point, the separation efficiency is 97%. Under normal working conditions, the pressure drop of a single cyclone separator at the working point is not greater than 0.05 MPa.

[0030] The method for improving efficiency is that in the rotating gas flow inside the cyclone dust collector, the particulate matter moves radially outward towards the cylinder cone wall under the action of centrifugal force, and the movement speed can be obtained from the motion equation of the centrifugal force and the airflow resistance of the particulate matter. Obviously, the purpose of cyclone dust collector separation is to make the particulate matter reach the cylinder cone wall as soon as possible. Therefore, prolonging the movement time of the particulate matter in the cyclone dust collector and increasing the probability of collision between the particulate matter and the cylinder cone wall under the action of airflow can improve the dust removal efficiency of the cyclone dust collector.

[0031] During the operation of the cyclone dust collector, most of the fine dust penetrates the separation area, resulting in a decrease in the efficiency of fine dust. At the same time, the cyclone dust collector has low efficiency for fine particulate matter, especially for PM10 with a particle size of less than 10 μm, and the dust removal efficiency gradually decreases as the particle size decreases. The airflow velocity distribution of the cyclone dust collector is axisymmetric in the radial direction or appears eccentric. Especially near the dust discharge port at the lower part of the cone, there is a obvious "eccentricity"; near the lower part of the exhaust pipe, the radial airflow velocity is larger, and there is a "short circuit" phenomenon. Airflow eccentricity or short circuit is not conducive to dust separation.

[0032] Therefore, it is necessary to research and find additional components that can improve the performance of the cyclone without changing the original structure of the cyclone.

[0033] The principle of the utility model lies in that the movement of gas and solid particles in the cyclone separator is very complex, and there are tangential, radial and axial velocities at any point in the device, which changes with the rotation radius. In actual operation, the appropriate air speed should be controlled. Experiments show that if the air speed is too small, the separation efficiency is not high. However, if the air speed is too high, vortex and back mixing phenomenon will be easily produced, which will also reduce the separation efficiency.

[0034] The rotational motion caused by tangential introduction of airflow makes solid particles or liquid drops with large inertia centrifugal force be thrown to the outer wall surface and separated.

[0035] From the current research theory, in addition to the main rotational flow including inner rotational flow and outer rotational flow, secondary vortex flow exists in the cyclone separator, which is composed of axial velocity vz and radial velocity vr, and the secondary vortex flow can cause serious "back mixing" of solid particles in the separator, and the secondary vortex flow has great influence on the performance of the cyclone separator, especially on the separation efficiency. The main local secondary vortex flow is: 1) longitudinal annular flow in the annular space; 2) short circuit flow at the lower end of the exhaust pipe; 3) the rotation center of the airflow deviates from the geometric center of the equipment, that is, the deflection flow or asymmetric flow; 4) the inner rotational flow is unstable, and the rotational flow center has "tail wagging" motion, that is, the rotational vortex core phenomenon. It can be seen that eliminating the secondary vortex flow and reducing the "back mixing" of solid particles is an important content to improve the separation efficiency of the cyclone separator.

[0036] Based on the system research and test work, it is found that the inner sleeve is additionally arranged in the cyclone separator, so that the helical airflow in the equipment is guided simply, and the rotational flow path and channel are lengthened, and at the same time, in order to balance and compensate the adverse effects of the additional inner cylinder structure on the local structure of the airflow return area of the original structure, such as possible dust accumulation and possible increase of the overall flow passage pressure drop, the synchronous impeller, the top bypass pipe and the drainage fan are additionally arranged.

[0037] The utility model discloses a spiral inlet pipe 1, an air inlet 2, a cone 3, an ash bucket 4, an air outlet 5, an overflow cylinder 7, an inner cylinder 8 and an upturned cylinder 9. The air inlet 2 is tangentially installed on one side of the top outer wall of the spiral inlet pipe 1, and the bottom of the spiral inlet pipe 1 is connected with the cone 3. The bottom of the cone 3 is connected with the ash bucket 4, and the upper end of the spiral inlet pipe 1 is provided with the air outlet 5. The overflow cylinder 7 is communicated with the air outlet 5 and is installed on the inner top of the spiral inlet pipe 1. The lower end of the overflow cylinder 7 is communicated with the upturned cylinder 9 through the inner cylinder 8.

[0038] The utility model will be further explained in connection with the drawings and examples.

[0039] The preferred embodiment of the utility model and the examples included in the following can more easily understand the content of the utility model. Unless otherwise defined, all technical and scientific terms used in this paper have the same meaning as that generally understood by ordinary skilled persons in the field to which the utility model belongs. When there is a contradiction, the definition in the specification shall prevail.

[0040] Example 1: as shown in the accompanying Figure 1As shown, the cyclone cover 11 is arranged at the lower part of the cone 3, i.e. the lower side of the lower end of the upturned barrel 9, and the synchronous impeller 13 is arranged in the lower end of the upturned barrel 9, and the cyclone cover 11 and the synchronous impeller 13 are coaxially connected through the connecting shaft 12.

[0041] In the foregoing, the upper support 14 is arranged at the connecting part between the bottom of the inner wall of the spiral air inlet pipe 1 and the cone 3. The upper support 14 is used for fixing and centralizing the inner barrel 8 and the upturned barrel 9. The lower end of the upturned barrel 9 is curled inward.

[0042] In the foregoing, the lower support 10 is arranged on the inner wall of the lower part of the cone 3. The lower support 10 is used for arranging and fixing the cyclone cover 11.

[0043] In the embodiment of the utility model, the overflow barrel 7 penetrates the top plate and is inserted into the air outlet 5 from a partial top opening on one side, and meanwhile, the overflow barrel 7 penetrates the top plate and is connected to the top bypass pipe 15 on the other side and is connected back to the top edge of the spiral air inlet pipe 1 on the same side. The air outlet 5 is provided with an air outlet regulating valve 6. The air outlet 5 is connected to a drainage fan 17. Further, a gas distribution and maintenance valve 16 is arranged on the top bypass pipe 15.

[0044] Preferably, as shown in the accompanying drawings, Figure 2 As shown, the blades of the cyclone cover 11 or the synchronous impeller 13 are non-closed Mobius blades, the front end and the rear end of the blade are inclined to the same side, dust is not easy to accumulate, the positive and negative rotation air flow power conversion efficiency is high, and the static pressure air volume per unit time in the positive and negative rotation state of the blade does not differ by more than 5%, the blade can not only rotate to blow out heat, but also can rotate to blow out, discharge foreign matters and dust, maintain the cleanliness of the air outlets on both sides of the fan, improve the air volume, and prolong the service life.

[0045] In the embodiment of the utility model, the device body structure is a barrel-cone type of the spiral air inlet pipe 1-cone 3; the axial blades are Mobius ring structures balanced in direct current and reverse current; the air inlet 2 is a circular pipe type or a rectangular pipe type; preferably, the air inlet 2 is a volute structure. The operation condition is that the air flow speed of the air inlet 2 is 10-25 m / s, and the pressure drop of the air inlet 2-air outlet 5 is not greater than 2 Kpa. The hopper 4 adopts a large-size leg structure to avoid gas channeling.

[0046] In the embodiment of the utility model, preferably, the cone angle of the cone 3 ranges from 12 to 30 degrees. The height ratio of the cone 3 to the height of the spiral air inlet pipe 1 is 1.5-2.5.

[0047] In the embodiment of the utility model, working airflow spirally cuts into the helical inlet pipe 1 from the air inlet 2 along the wall and spirally moves downward along the channel between the inner wall of the helical inlet pipe 1 and the outer wall of the overflow cylinder 7-inner cylinder 8-upturned cylinder 9, forming outer spiral flow; when the descending working airflow reaches the bottom of the cone 3, the gas pressure is increased due to the diameter reduction effect of the cone 3, at this time, the working airflow converges and is upturned into the upturned cylinder 9 from the lower end port of the upturned cylinder 9, at this time, the airflow direction changes, a certain pressure drop is also formed, dust is first separated from the working gas in a large amount and falls into the ash bucket 4. Next, the ascending airflow entering from the lower end port of the upturned cylinder 9 gradually expands in diameter along the inner cylinder 8 to the overflow cylinder 7, the gas pressure further decreases, but at the same time, due to the fact that the air outlet 5 is arranged at the top side edge of the overflow cylinder 7 and plays a spiral drainage role, the spiral ascending airflow is formed in the overflow cylinder 7, the inner cylinder 8 and the upturned cylinder 9, it is worth noting that this measure solves the problem that the inner spiral flow is weakened when the inner cylinder is arranged in the prior art; the spiral ascending airflow in the overflow cylinder 7, the inner cylinder 8 and the upturned cylinder 9 is stable and easy to control, dust is continuously separated and falls into the ash bucket 4 from the lower end port of the upturned cylinder 9; as one of the innovations of the utility model, the cyclone cover 11 arranged in the cone 3 rotates under the pushing of the working airflow and further drives the synchronous impeller 13 located in the upturned cylinder 9 to rotate through the connecting shaft 12, so that the dust accumulated on the inner wall of the upturned cylinder 9 is cleaned in an energy-saving and environment-friendly manner.

[0048] Further, as the innovation of the embodiment, the gas distribution maintenance valve 16 is opened under two conditions;

[0049] Firstly, when the inside of the equipment needs to be cleaned and maintained, the air outlet adjusting valve 6 is closed, the working airflow is replaced by clean air, the clean air enters the helical inlet pipe 1 from the air inlet 2, at this time, the gas distribution maintenance valve 16 is fully opened; part of the clean air enters the overflow cylinder 7 from the top and spirally descends, gradually increasing the pressure, the inner wall of the overflow cylinder 7, the sweeping inner cylinder 8 and the upturned cylinder 9, at the same time, the remaining part of the clean air forms outer spiral flow, and the inside of the equipment is cleaned.

[0050] Secondly, when the working airflow carrying part of special dust is processed, the gas distribution maintenance valve 16 can be opened and adjusted at this time to counter the inner spiral flow working airflow in the overflow cylinder 7.

[0051] Based on the above embodiment of the utility model, all other embodiments obtained by the person skilled in the art without creative labor shall belong to the protection range of the utility model. In order to avoid exhaustive enumeration of all the embodiments which are not required and cannot be fully enumerated.

Claims

1. A double-sleeve cyclone separator, comprising a spiral inlet pipe (1), an inlet (2), a cone (3), an ash hopper (4), an outlet (5), an overflow cylinder (7), an inner cylinder (8), and an upward-turning cylinder (9); characterized in that, An air inlet (2) is tangentially installed on one side of the top outer wall of the spiral air inlet pipe (1), and a cone (3) is connected to the bottom of the spiral air inlet pipe (1). A ash hopper (4) is connected to the bottom of the cone (3), and an air outlet (5) is installed in the middle of the upper end of the spiral air inlet pipe (1). An overflow cylinder (7) is connected to the bottom of the top of the spiral air inlet pipe (1), i.e., the lower side of the air outlet (5). The lower end of the overflow cylinder (7) is connected to the upper tilting cylinder (9) through the inner cylinder (8). A swirl shroud (11) is set in the lower part of the cone (3), i.e., the lower side of the lower port of the upper tilting cylinder (9). At the same time, a synchronous impeller (13) is set in the lower port of the upper tilting cylinder (9). The swirl shroud (11) and the synchronous impeller (13) are coaxially connected through a connecting rod (12).

2. The double-sleeve fine cyclone separator according to claim 1, characterized in that, The overflow cylinder (7) passes through the top plate and is inserted into the air outlet (5) from a partial top opening on one side. At the same time, the overflow cylinder (7) passes through the top plate and is connected to the top bypass pipe (15) from a partial top opening on the other side and is connected back to the top edge of the spiral air inlet pipe (1) on the same side.

3. The double-sleeve fine cyclone separator according to claim 1, characterized in that, The blades of the swirl cover (11) or the synchronous impeller (13) are open Möbius blades, with the front and rear ends of the blades tilted in the same direction.

4. The double-sleeve fine cyclone separator according to claim 1, characterized in that, The spiral intake pipe (1) is vertically and coaxially arranged with the overflow cylinder (7), the inner cylinder (8) and the upward-turning cylinder (9).

5. The double-sleeve fine cyclone separator according to claim 1, characterized in that, The inner diameters of the overflow cylinder (7), inner cylinder (8), and top-turning cylinder (9) decrease sequentially.

6. The double-sleeve fine cyclone separator according to claim 1, characterized in that, The lower port of the upturned cylinder (9) is located at the midpoint of the central axis of the cone (3).

7. The double-sleeve fine cyclone separator according to claim 1, characterized in that, The inner diameter of the overflow cylinder (7) is 50-75% of the inner diameter of the spiral air inlet pipe (1), and the inner diameter of the top-turning cylinder (9) is 85-150% of the inner diameter of the bottom port of the cone (3) or the ash hopper (4).

8. The double-sleeve fine cyclone separator according to claim 1, characterized in that, An air outlet regulating valve (6) is installed on the air outlet (5).

9. The double-sleeve fine cyclone separator according to claim 1, characterized in that, The air outlet (5) is connected to an external exhaust fan (17).

10. The double-sleeve fine cyclone separator according to claim 2, characterized in that, Install a gas distribution maintenance valve (16) on the top bypass pipe (15).

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