Tube bundle type dust collector and dust collector tube bundle

Abstract

The utility model discloses a dust collector tube bundle, which comprises a first fixed rotational flow impeller, a rotary rotational flow impeller and a second fixed rotational flow impeller which are arranged along the axial direction of a central shaft, the first fixed rotational flow impeller and the second fixed rotational flow impeller are fixedly arranged in an outer cylinder, and the rotary rotational flow impeller is rotatably arranged in the outer cylinder. The central shaft is arranged in the outer cylinder; the rotating direction of blades of the rotating rotational flow impeller is opposite to the rotating direction of blades of the first fixed rotational flow impeller, and the rotating direction of the blades of the first fixed rotational flow impeller is the same as the rotating direction of the blades of the second fixed rotational flow impeller. According to the tube bundle of the dust remover, the centrifugal force of passing flue gas is improved, the trapping efficiency of small particles is improved, and the self-adaptability of the tube bundle is high. The utility model further provides a tube bundle type dust collector.

Description

Technical Field

[0001] The utility model relates to the technical field of demisting and dedusting equipment, in particular to a tube bundle type dust collector and a dust collector tube bundle. Background Art

[0002] The tube bundle type dust collector is a demisting and dedusting device, which is applied to the removal and purification of droplets and fine dust carried by the saturated clean flue gas in a wet desulfurization tower. It mainly utilizes the characteristics of a large number of fine droplets rich in the upper part of the absorption tower with low-temperature saturated clean flue gas. And during the high-speed movement of these droplets, the dust collector can significantly increase the collision probability between fine dust particles and droplets. Through the agglomeration effect of droplets and fine dust particles, the effective capture and removal of extremely tiny dust particles and droplets are realized.

[0003] In the existing tube bundle type dust collector, blades are fixedly connected inside the tube bundle. The airflow pattern formed by the fixed blades is often fixed, which means that the direction, speed and distribution of the airflow change limitedly inside the dust collector. When the airflow flows in a constant manner, it can only contact and impact dust particles and droplets at a specific angle and speed. In this case, the collision probability between dust particles and droplets and the airflow is limited by this fixed flow pattern, thus restricting the dust removal efficiency. At the same time, the blades inside the tube bundle are fixedly arranged and they cannot be dynamically adjusted according to the actual situation of the airflow or the distribution of dust particles and droplets. In practical applications, the size, density and distribution of dust particles and droplets may be uneven, and the fixed blades cannot be optimized for this unevenness. This results in that in some areas, the airflow may be too concentrated, causing waste of energy; while in other areas, the airflow may be insufficient, resulting in dust particles and droplets not being effectively captured. The fixed blade structure may also generate some flow dead zones or eddy current areas. In these areas, the speed and direction of the airflow may change, resulting in the movement trajectories of dust particles and droplets becoming complex and difficult to predict. This not only reduces the collision and agglomeration efficiency, but also may cause some dust particles and droplets to escape from the dust collector. Summary of the Utility Model

[0004] In view of this, the utility model provides a dust collector tube bundle, which improves the centrifugal force of the passing flue gas, improves the capture efficiency of tiny particles, and has strong self-adaptability.

[0005] The utility model also provides a tube bundle type dust collector.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A dust collector tube bundle includes a first fixed swirl impeller, a rotating swirl impeller, and a second fixed swirl impeller axially arranged along the central axis. The first fixed swirl impeller and the second fixed swirl impeller are fixedly arranged in the outer cylinder, the rotating swirl impeller is rotatably arranged in the outer cylinder, and the central axis is arranged in the outer cylinder;

[0008] The blade swirl direction of the rotating swirl impeller is opposite to that of the first fixed swirl impeller, and the blade swirl direction of the first fixed swirl impeller is the same as that of the second fixed swirl impeller.

[0009] Optionally, the first blade outer frame of the first fixed swirl impeller is fixedly connected to the outer cylinder through a first connecting piece, and the second blade outer frame of the second fixed swirl impeller is fixedly connected to the outer cylinder through a second connecting piece.

[0010] Optionally, a number of first connection through holes are provided on the first blade outer frame, second connection through holes are provided at positions corresponding to the first connection through holes on the outer cylinder, and the first connecting piece is connected in the first connection through holes and the second connection through holes;

[0011] A number of third connection through holes are provided on the second blade outer frame, fourth connection through holes are provided at positions corresponding to the third connection through holes on the outer cylinder, and the second connecting piece is connected in the third connection through holes and the fourth connection through holes.

[0012] Optionally, the first fixed swirl impeller is arranged at a position close to the lower end of the outer cylinder;

[0013] The lower end of the first fixed swirl impeller is limited by a first positioning cylinder, and the upper end is limited by a second positioning cylinder; the lower end of the rotating swirl impeller is limited by a third positioning cylinder, and the upper end is limited by a fourth positioning cylinder, and the lower end of the second fixed swirl impeller is limited by a fifth positioning cylinder, and the upper end is limited by a sixth positioning cylinder.

[0014] Optionally, the lower end of the first positioning cylinder is tightly sleeved on the central axis, and the upper end is inserted into the end of the first fixed swirl impeller;

[0015] The lower end of the second positioning cylinder is inserted into the end of the first fixed swirl impeller, and the upper end is tightly sleeved on the central axis;

[0016] The lower end of the third positioning cylinder is inserted into the upper end of the second positioning cylinder, and the upper end is inserted into the rotating swirl impeller through a first bearing support cylinder;

[0017] The lower end of the fourth positioning cylinder is inserted into the rotating swirl impeller through a second bearing support cylinder, and the upper end is inserted into the fifth positioning cylinder;

[0018] The lower end of the fifth positioning cylinder is inserted into the upper end of the fourth positioning cylinder, and the upper end is inserted into the lower end of the second fixed swirl impeller;

[0019] The lower end of the sixth positioning cylinder is inserted into the upper end of the second fixed swirl impeller, and the upper end is tightly sleeved on the central shaft.

[0020] Optionally, the first positioning cylinder, the second positioning cylinder, the third positioning cylinder, the fourth positioning cylinder, the fifth positioning cylinder and the sixth positioning cylinder are all frustum-shaped cylinders with one end thick and the other end thin, and the large ends of the frustum-shaped cylinders are all arranged close to the impeller.

[0021] Optionally, the insertions are all connected by a tenon and mortise structure, and the tenon and the mortise are respectively arranged on adjacent connection structures.

[0022] Optionally, the rotating swirl impeller is rotatably connected to the central shaft through a bearing;

[0023] There are two bearings, and the two bearings are arranged in parallel at both ends of the shaft hole of the rotating swirl impeller. One bearing is limited by the first bearing support cylinder, and the other bearing is limited by the second bearing support cylinder.

[0024] Optionally, the central shaft is a hollow shaft, and the end of the hollow shaft is communicated with the flushing system.

[0025] It can be seen from the above technical solutions that for the dust collector tube bundle provided by the present invention, by arranging a rotating swirl impeller in the inner cavity of the outer cylinder through which the flue gas flows, when the rotating swirl impeller rotates, a strong vortex phenomenon will be excited inside the tube bundle. These vortices not only significantly enhance the turbulence of the fluid, but also form an effective centrifugal force field inside the tube bundle. Under the combined action of the vortices and the centrifugal force, the micro solid-liquid particles are more likely to be pushed towards the tube wall of the outer cylinder, and the micro solid-liquid particles slide along the wall surface to the collection device, effectively avoiding the escape of the solid-liquid particles to the outside of the outer cylinder. For the dust collector tube bundle of the present invention, by arranging a rotating swirl impeller in the outer cylinder, the centrifugal force of the passing flue gas is increased, so that the micro solid-liquid particles are thrown towards the inner wall surface of the outer cylinder under the action of a higher centrifugal force, and the trapping efficiency of the micro particles is improved. By setting a structure combining a fixed swirl impeller and a rotating swirl impeller with different blade rotation directions, the airflow is guided to form a uniform and stable flow field distribution inside the outer cylinder. This flow field distribution is conducive to the uniform diffusion and efficient trapping of the particulate dust and droplets, and improves the performance of the tube bundle.

[0026] The present invention also provides a tube bundle type dust collector, including a tube bundle, and the tube bundle is the above-mentioned dust collector tube bundle. Since the tube bundle type dust collector of the present invention includes the above-mentioned tube bundle, it has the advantages of the above-mentioned tube bundle, which will not be elaborated here. Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Perspective structure schematic diagram of the dust collector tube bundle provided by the embodiment of the present invention;

[0029] Figure 2 Cross-sectional structure schematic diagram of the dust collector tube bundle provided by the embodiment of the present invention;

[0030] Figure 3 Structure schematic diagram of the first fixed swirl impeller, rotating swirl impeller and second fixed swirl impeller installed on the central shaft provided by the embodiment of the present invention;

[0031] Figure 4 Structure schematic diagram of the first fixed swirl impeller provided by the embodiment of the present invention;

[0032] Figure 5 For Figure 2 Partial enlarged structure schematic diagram of part I in

[0033] Figure 6 Structure schematic diagram of the first positioning cylinder provided by the embodiment of the present invention;

[0034] Figure 7 Cross-sectional structure schematic diagram of the first positioning cylinder at the A-A position provided by the embodiment of the present invention;

[0035] Figure 8 Structure schematic diagram of the third positioning cylinder provided by the embodiment of the present invention;

[0036] Figure 9 Cross-sectional structure schematic diagram of the third positioning cylinder at the B-B position provided by the embodiment of the present invention;

[0037] Figure 10 Structure schematic diagram of the first bearing support cylinder provided by the embodiment of the present invention;

[0038] Figure 11 Cross-sectional structure schematic diagram of the first bearing support cylinder at the C-C position provided by the embodiment of the present invention;

[0039] Figure 12 Structure schematic diagram of the bearing provided by the embodiment of the present invention;

[0040] Figure 13Schematic diagram of the connection structure of the first bearing support cylinder, the third positioning cylinder and the second positioning cylinder provided by the embodiment of the present utility model;

[0041] Figure 14 For Figure 2 Partial enlarged structural schematic diagram of part II in

[0042] Figure 15 For Figure 2 Partial enlarged structural schematic diagram of part III in

[0043] Wherein:

[0044] 1. Outer cylinder,

[0045] 2. Second fixed swirl impeller,

[0046] 3. Rotating swirl impeller,

[0047] 4. First fixed swirl impeller,

[0048] 401. First blade outer frame, 402. First blade, 403. First insertion mortise, 404. First connection through hole, 405. First blade inner frame,

[0049] 5. Central shaft,

[0050] 6. Sixth positioning cylinder,

[0051] 7. Second connecting piece,

[0052] 8. Fifth positioning cylinder,

[0053] 9. Fourth positioning cylinder,

[0054] 10. Second bearing support cylinder,

[0055] 11. Bearing,

[0056] 1101. Inner ring mortise, 1102. Outer ring tenon,

[0057] 12. First bearing support cylinder,

[0058] 1201. Fifth insertion tenon, 1202. Fourth insertion mortise,

[0059] 13. Third positioning cylinder,

[0060] 1301. Third insertion tenon, 1302. Fourth insertion tenon,

[0061] 14. Second positioning cylinder,

[0062] 15. First connecting piece,

[0063] 16. First positioning cylinder,

[0064] 1601. Second plug-in mortise; 1602. First plug-in tenon. Detailed implementation manner

[0065] The utility model discloses a dust collector tube bundle, which improves the centrifugal force of the passing flue gas, improves the capture efficiency of fine particles, and has strong self-adaptability of the tube bundle.

[0066] The utility model also provides a tube bundle type dust collector.

[0067] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0068] Referring to Figures 1 to 15 , the dust collector tube bundle of the present utility model includes a first fixed swirl impeller 4, a rotating swirl impeller 3, and a second fixed swirl impeller 2 arranged along the axial direction of the central axis 5. The first fixed swirl impeller 4 and the second fixed swirl impeller 2 are fixedly arranged in the outer cylinder 1, the rotating swirl impeller 3 is rotatably arranged in the outer cylinder 1, and the central axis 5 is arranged in the outer cylinder 1. The blade rotation direction of the rotating swirl impeller 3 is opposite to that of the first fixed swirl impeller 4, and the blade rotation direction of the first fixed swirl impeller 4 is the same as that of the second fixed swirl impeller 2.

[0069] Among them, the central axis 5 is arranged along the axial direction of the outer cylinder 1. The first fixed swirl impeller 4, the rotating swirl impeller 3, and the second fixed swirl impeller 2 are arranged in sequence from bottom to top. As Figure 2 shown, the black arrows in the figure are the flue gas flow directions, and the flue gas flows upward through the outer cylinder 1 from bottom to top. The hollow arrows in the figure are the liquid flow directions. Specifically, in order to facilitate the support of the rotating swirl impeller 3, the rotating swirl impeller 3 is arranged between the first fixed swirl impeller 4 and the second fixed swirl impeller 2. As Figures 1 to 3 shown, in order to facilitate viewing the blade rotation direction of the impeller, Figure 3 the outer frames of the blades of all the impellers in

[0070] The dust collector tube bundle of the present utility model is provided with a rotating swirl impeller 3 in the inner cavity of the outer cylinder 1 through which the flue gas flows. When the rotating swirl impeller 3 rotates, a strong vortex phenomenon will be excited inside the tube bundle. These vortices not only significantly enhance the turbulence of the fluid, but also form an effective centrifugal force field inside the tube bundle. Under the combined action of the vortices and the centrifugal force, the micro solid-liquid particles are more easily pushed towards the tube wall of the outer cylinder 1, and the micro solid-liquid particles slide down along the wall surface to the collection device, effectively avoiding the escape of the solid-liquid particles to the outside of the outer cylinder 1. The dust collector tube bundle of the present utility model improves the centrifugal force of the passing flue gas by arranging the rotating swirl impeller 3 in the outer cylinder 1, so that the micro solid-liquid particles are thrown towards the inner wall surface of the outer cylinder 1 under the action of a higher centrifugal force, and the trapping efficiency of the fine particles is improved.

[0071] In the dust collector tube bundle of the present utility model, by arranging a structure combining a fixed swirl impeller and a rotating swirl impeller with different blade rotation directions, the air flow is guided to form a uniform and stable flow field distribution inside the outer cylinder 1. This flow field distribution is conducive to the uniform diffusion and efficient trapping of the particulate dust and droplets, and improves the performance of the tube bundle. The dust collector tube bundle of the present utility model can reduce the vortex and dead angle phenomena caused by the fixed swirl impeller inside the dust collector by arranging the rotating swirl impeller 3. The vortices and dead angles caused by the fixed swirl impeller often lead to problems such as a decrease in the air flow velocity and uneven pressure distribution, affecting the removal effect of the particulate dust and droplets. Since the blade rotation direction of the rotating swirl impeller 3 is opposite to the blade rotation directions of the first fixed swirl impeller 4 and the second fixed swirl impeller 2, the rotating blades can break these adverse flow field structures and make the air flow pass through the dust collector more smoothly.

[0072] The power for the rotation of the rotating swirl impeller 3 in the dust collector tube bundle of the present utility model comes from the flow velocity of the flue gas itself passing through the outer cylinder 1. Different flue gas flow velocities cause different rotation speeds of the rotating swirl impeller 3, resulting in different centrifugal forces and flow fields. The rotation speed of the rotating swirl impeller 3 will self-regulate to adapt to the flue gas flow velocity, and through the adaptation and regulation between the two, the removal rate of the micro solid-liquid particles is maximized as much as possible.

[0073] In one embodiment, the first fixed swirl impeller 4 includes a first blade outer frame 401, a first blade inner frame 405 and first blades 402. A plurality of first blades 402 are provided, and the plurality of first blades 402 are evenly distributed between the first blade outer frame 401 and the first blade inner frame 405, as Figure 4As shown. The first vane outer frame 401 is fixedly connected to the outer cylinder 1 through the first connecting member 15. The second fixed swirl impeller 2 includes a second vane outer frame, a second vane inner frame and second vanes. Its specific setting structure is the same as that of the first fixed swirl impeller 4, and reference can be made to the structure diagram of the first fixed swirl impeller 4. A plurality of the second vanes are provided, and the plurality of second vanes are evenly distributed between the second vane outer frame and the second vane inner frame. The second vane outer frame is fixedly connected to the outer cylinder 1 through the second connecting member 7.

[0074] In order to facilitate the connection of the first fixed swirl impeller 4, a plurality of first connection through holes 404 are provided on the first vane outer frame 401, and second connection through holes are provided at positions on the outer cylinder 1 corresponding to the first connection through holes 404. The first connecting member 15 is connected in the first connection through hole 404 and the second connection through hole. Similarly, a plurality of third connection through holes are provided on the second vane outer frame, and fourth connection through holes are provided at positions on the outer cylinder 1 corresponding to the third connection through holes. The second connecting member 7 is connected in the third connection through hole and the fourth connection through hole. In order to ensure the connection reliability, it can be understood that at least three first connection through holes 404 are provided. Similarly, at least three third connection through holes are also provided. The structure of the second fixed swirl impeller 2 is the same as that of the first fixed swirl impeller 4, and the swirl directions of the vanes of the two are the same, which will not be elaborated here. The swirl direction of the vanes included in the rotating swirl impeller 3 is opposite to the swirl direction of the first vane 402, and the vane outer frame of the rotating swirl impeller 3 does not need to be connected to the outer cylinder, so as to facilitate the rotation of the rotating swirl impeller 3.

[0075] In an embodiment, the first fixed swirl impeller 4 is arranged at a position close to the lower end of the outer cylinder 1. The lower end of the first fixed swirl impeller 4 is limited by the first positioning cylinder 16, and the upper end is limited by the second positioning cylinder 14. The lower end of the rotating swirl impeller 3 is limited by the third positioning cylinder 13, and the upper end is limited by the fourth positioning cylinder 9. The lower end of the second fixed swirl impeller 2 is limited by the fifth positioning cylinder 8, and the upper end is limited by the sixth positioning cylinder 6, as Figure 2 shown. The first positioning cylinder 16, the second positioning cylinder 14, the third positioning cylinder 13, the fourth positioning cylinder 9, the fifth positioning cylinder 8 and the sixth positioning cylinder 6 are all frustum-shaped cylinders with one end thick and one end thin, and the large ends of the frustum-shaped cylinders are all close to the impeller. By arranging the positioning cylinders, reliable support is provided for both ends of the impeller, and the connection reliability of the impeller is improved. Each positioning cylinder is arranged as a hollow frustum-shaped cylinder, which is not only beneficial to being sleeved on the central shaft 5, but also beneficial to improving the stability of the support.

[0076] Specifically, the lower end of the first positioning cylinder 16 is tightly sleeved on the central shaft 5, and the upper end is inserted into the end of the first fixed swirl impeller 4 to achieve the bottom support of the first fixed swirl impeller 4. The first positioning cylinder 16 is fixedly connected to the central shaft 5. The fixed connection here can be a fitting connection or other connection methods commonly used by those skilled in the art, and is not limited here. The lower end of the second positioning cylinder 14 is inserted into the end of the first fixed swirl impeller 4, and the upper end is tightly sleeved on the central shaft 5. The lower end of the third positioning cylinder 13 is inserted into the upper end of the second positioning cylinder 14, and the upper end is inserted into the rotating swirl impeller 3 through the first bearing support cylinder 12. The lower end of the fourth positioning cylinder 9 is inserted into the rotating swirl impeller 3 through the second bearing support cylinder 10, and the upper end is inserted into the fifth positioning cylinder 8. The lower end of the fifth positioning cylinder 8 is inserted into the upper end of the fourth positioning cylinder 9, and the upper end is inserted into the lower end of the second fixed swirl impeller 2. The lower end of the sixth positioning cylinder 6 is inserted into the upper end of the second fixed swirl impeller 2, and the upper end is tightly sleeved on the central shaft 5. For the tight sleeved connections at the above-mentioned locations, the connection of the first positioning cylinder 16 can be referred to.

[0077] In one embodiment, the above-mentioned insertions are all connected by a tenon and mortise structure, and the tenon and mortise are respectively arranged on adjacent connection structures.

[0078] To achieve rotational connection, the rotating swirl impeller 3 is rotationally connected to the central shaft 5 through a bearing 11. To improve the stability of the support, two bearings 11 are provided. The two bearings 11 are arranged in parallel at both ends of the shaft hole of the rotating swirl impeller 3. One bearing 11 is limited by the first bearing support cylinder 12, and the other bearing 11 is limited by the second bearing support cylinder 10.

[0079] In a specific embodiment, for the convenience of insertion and limitation, a first insertion mortise 1601 is provided at the end of the small end of the first positioning cylinder 16, and a first insertion tenon 1602 is provided at the end of the large end, as Figure 6 and Figure 7 shown. Correspondingly, as Figure 4 shown, second insertion mortises 403 are provided at both ends of the first blade inner frame 405 of the first fixed swirl impeller 4. The first insertion tenon 1602 is inserted into the second insertion mortise 403 at one end, as Figure 5 shown. Similarly, a third insertion mortise is provided at the end of the small end of the second positioning cylinder 14, and a second insertion tenon is provided at the end of the large end. The structure of the second positioning cylinder 14 is the same as that of the first positioning cylinder 16. The structure diagram thereof can refer to the structure diagram of the first positioning cylinder 16. The second insertion tenon is inserted into the second insertion mortise 403 at the other end of the first fixed swirl impeller 4, as Figure 5 shown.

[0080] To facilitate the insertion into the third insertion mortise at the small end of the second positioning cylinder 14, a third insertion tenon 1301 is provided at the small end of the third positioning cylinder 13. As Figure 8 and Figure 9 shown, the third insertion tenon 1301 is inserted into the third insertion mortise on the second positioning cylinder 14. A fourth insertion tenon 1302 is provided at the large end of the third positioning cylinder 13. By providing the first bearing support cylinder 12 and the second bearing support cylinder 10, it is convenient to support the bearing 11. Referring to Figure 10 and Figure 11 , a fourth insertion mortise 1202 is provided at one end of the first bearing support cylinder 12, and a fifth insertion tenon 1201 is provided at the other end. The fourth insertion mortise 1202 is inserted into the fourth insertion tenon 1302, as Figure 13 shown. The fifth insertion tenon 1201 is inserted into the inner ring mortise 1101 on the bearing 11. The inner ring mortise 1101 is provided at a position near the end of the inner ring of the bearing 11. An outer ring tenon 1102 is provided at a position near the end of the outer ring of the bearing 11. The outer ring tenon 1102 is inserted into the connection mortise on the rotating swirl impeller 3. The structures of the first bearing support cylinder 12 and the second bearing support cylinder 10 are the same. The connection method of the second bearing support cylinder 10 refers to that of the first bearing support cylinder 12, and the specific connection structure refers to Figure 14 shown. The structure of the fourth positioning cylinder 9 is the same as that of the third positioning cylinder 13, which will not be elaborated here. The structures of the sixth positioning cylinder 6 and the fifth positioning cylinder 8 are the same as that of the first positioning cylinder 16, which will not be elaborated here.

[0081] Furthermore, the central shaft 5 is a hollow shaft. This structural setting can not only reduce the structural weight but also facilitate the connection between the end of the hollow shaft 5 and the flushing system, and the hollow shaft can transport liquid.

[0082] For the convenience of connection, the first connecting piece 15 and the second connecting piece 7 are rivets. Using rivet connection is more convenient. When the second connecting piece 7 is connected by rivets, the specific connection structure refers to Figure 15 shown.

[0083] When the dust collector tube bundle of the present utility model is in operation, the waste flue gas sequentially passes through the first fixed swirl impeller 4, the rotating swirl impeller 3 and the second fixed swirl impeller 2. The swirling direction of the first blades 402 in the first fixed swirl impeller 4 is opposite to that of the second blades in the rotating swirl impeller 3 and the same as that of the third blades in the second fixed swirl impeller 2, that is, the waste flue gas sequentially passes through the impellers arranged with reverse swirl, forward swirl and reverse swirl. When the waste flue gas passes through the first fixed swirl impeller 4 and the rotating swirl impeller 3, the flow rate of the waste flue gas will endow the rotating swirl impeller 3 with a rotational speed, and an independent strong flow field region will be formed between the first fixed swirl impeller 4 and the rotating swirl impeller 3 which is rotatably arranged inside the outer cylinder 1. The rotational speed of the blades of the rotating swirl impeller 3 will be adaptively adjusted according to the flow rate of the waste flue gas itself, so as to make corresponding adjustments to the capture and contact of micro solid-liquid particles, and remove more than 85% of the fine particles by rough filtration. Then, when the roughly filtered waste flue gas continues to pass through the rotating swirl impeller 3 and the second fixed swirl impeller 2, the rotating swirl impeller 3 and the second fixed swirl impeller 2 with rotational speeds adaptively adjusted according to the flow rate of the waste flue gas will also form another independent flow field region inside the outer cylinder 1, and will further remove the fine particles by fine filtration, thereby improving the efficiency of particle removal of the whole device. Among them, the power for the rotation of the rotating swirl impeller 3 comes from the flow rate of the waste flue gas itself, generally 2.5 - 6.5 m / s, and no other power needs to be provided. Experiments are carried out with different flue gas flow rate gradients, and the data between the flue gas flow rate, the rotational speed of the rotating swirl impeller 3 and the net moisture content ratio of micro droplets are shown in Table 1 below. It can be seen from Table 1 that when the flue gas flow rate is within the normal range of 2.5 - 6.5 m / s, as the flow rate of the waste flue gas increases, the rotational speed of the rotating swirl impeller 3 also increases, and the moisture content ratio of the flue gas after removal also decreases relatively.

[0084] Initial waste smoke gas flow velocity (m / s) 2.5 3.5 4.5 5.5 6.5 Vane rotation speed (rpm) 220 420 586 732 903 <![CDATA[Droplets after removal Net moisture content ratio RH]]> 12.8％ 12.2％ 10.1％ 8.2％ 6.1％

[0085] Table 1

[0086] It can be seen from the experiments that as the flow rate of the waste flue gas passing through increases, the rotational speed of the rotating swirl impeller 3 also increases, and the centrifugal force received by the micro solid-liquid particles also increases. The particle removal rate begins to increase first. When the flow rate ≥ 5.5 m / s, the particle removal rate tends to be flat and infinitely close to 99.9%. As the flow rate of the waste flue gas passing through increases, the relative humidity rate of the removed flue gas becomes lower and lower.

[0087] The dust collector tube bundle of the present utility model can reduce the eddy current and dead angle phenomena caused by the fixed swirl impellers inside the dust collector by arranging the cooperating rotating swirl impeller 3, the second fixed swirl impeller 2 and the first fixed swirl impeller 4. The eddy current and dead angle caused by the fixed swirl impeller often lead to problems such as reduced air flow velocity and uneven pressure distribution, affecting the removal effect of particulate dust and liquid droplets. Since the blade rotation direction of the rotating swirl impeller 3 is opposite to that of the blades of the first fixed swirl impeller 4 and the second fixed swirl impeller 2, the rotating blades can break these adverse flow field structures and make the air flow through the dust collector more smoothly.

[0088] The present utility model also provides a tube bundle type dust collector, including a tube bundle, and the tube bundle is the above-mentioned dust collector tube bundle.

[0089] In the description of this solution, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this solution.

[0090] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this solution, "a plurality" means two or more, unless otherwise specifically defined.

[0091] In the description of this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0092] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dust collector tube bundle, characterized in that: It comprises a first fixed swirl impeller, a rotating swirl impeller and a second fixed swirl impeller arranged along the axial direction of the central axis, the first fixed swirl impeller and the second fixed swirl impeller are fixedly arranged in an outer cylinder, the rotating swirl impeller is rotatably arranged in the outer cylinder, and the central axis is arranged in the outer cylinder; The rotation direction of the blades of the rotating swirl impeller is opposite to that of the blades of the first fixed swirl impeller, and the rotation direction of the blades of the first fixed swirl impeller is the same as that of the blades of the second fixed swirl impeller.

2. The dust collector tube bundle according to claim 1, characterized in that: The first blade outer frame of the first fixed swirl impeller is fixedly connected to the outer cylinder via a first connecting member, and the second blade outer frame of the second fixed swirl impeller is fixedly connected to the outer cylinder via a second connecting member.

3. The dust collector tube bundle according to claim 2, characterized in that: A plurality of first connecting through holes are arranged on the first blade outer frame, a second connecting through hole is arranged on the outer cylinder at a position corresponding to the first connecting through hole, and the first connecting member is connected to the first connecting through hole and the second connecting through hole; The second blade outer frame is provided with a plurality of third connecting through holes, the outer cylinder is provided with fourth connecting through holes at positions corresponding to the third connecting through holes, and the second connecting member is connected to the third connecting through holes and the fourth connecting through holes.

4. The dust collector tube bundle according to claim 1, characterized in that: The first fixed swirl impeller is arranged near the lower end of the outer cylinder; The lower end of the first fixed swirl impeller is limited by the first positioning cylinder, and the upper end is limited by the second positioning cylinder; the lower end of the rotating swirl impeller is limited by the third positioning cylinder, and the upper end is limited by the fourth positioning cylinder; the lower end of the second fixed swirl impeller is limited by the fifth positioning cylinder, and the upper end is limited by the sixth positioning cylinder.

5. The dust collector tube bundle according to claim 4, characterized in that: The lower end of the first positioning cylinder is tightly sleeved on the central axis, and the upper end is plugged into the end of the first fixed swirl impeller; The lower end of the second positioning cylinder is plugged into the end of the first fixed swirl impeller, and the upper end is tightly sleeved on the central axis; The lower end of the third positioning cylinder is plugged into the upper end of the second positioning cylinder, and the upper end is plugged into the rotating swirl impeller through the first bearing support cylinder; The lower end of the fourth positioning cylinder is plugged into the rotating swirl impeller through the second bearing support cylinder, and the upper end is plugged into the fifth positioning cylinder; The lower end of the fifth positioning tube is plugged into the upper end of the fourth positioning tube, and the upper end is plugged into the lower end of the second fixed swirl impeller; The lower end of the sixth positioning cylinder is plugged into the upper end of the second fixed swirl impeller, and the upper end is tightly sleeved on the central axis.

6. The dust collector tube bundle according to claim 5, characterized in that: The first positioning tube, the second positioning tube, the third positioning tube, the fourth positioning tube, the fifth positioning tube and the sixth positioning tube are all truncated cone-shaped cylinders with one end being thick and the other end being thin, and the large ends of the truncated cone-shaped cylinders are all arranged close to the impeller.

7. The dust collector tube bundle according to claim 5, characterized in that: The plug-in connections are all tenon and mortise structure connections, and the tenon and mortise are respectively arranged on adjacent connection structures.

8. The dust collector tube bundle according to claim 5, characterized in that: The rotating swirl impeller is rotatably connected to the central shaft via a bearing; Two bearings are provided, and the two bearings are arranged in parallel at both ends of the shaft hole of the rotating swirl impeller. One bearing is limited by the first bearing support tube, and the other bearing is limited by the second bearing support tube.

9. The dust collector tube bundle according to claim 1, characterized in that: The central shaft is a hollow shaft, and the end of the hollow shaft is connected to the flushing system.

10. A tube bundle type dust collector, comprising a tube bundle, characterized in that: The tube bundle is the dust collector tube bundle according to any one of claims 1 to 9.

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