A central split cone ion wind dust removal device

Abstract

The present invention particularly relates to a central split cone type ion wind dust removal device, which belongs to the technical field of dust removal equipment. The device includes a shell body, which is provided with an exhaust port; a dividing cone, which is arranged in the shell body, and the dividing cone includes a dividing cone surface, a first dust removal air cavity and a first ventilation pipe connected to the dust removal air cavity, and the dividing cone surface is provided with a plurality of first ventilation holes, and the first ventilation holes are used to blow away dust from the material, the first ventilation holes are connected to the first dust removal air cavity, and the first ventilation pipe is connected to the air supply unit; a feed pipe, which is installed in the shell body, and a feed port is provided at the lower end of the feed pipe; a collecting hopper, which is arranged in the shell body; a discharge pipe, which is connected to the collecting hopper; a circular split cone type powder removal plate is used for powder removal, so that the material is evenly distributed on the dust removal plate, the dust removal effect is good, and the dust content in the polyolefin particles does not exceed 45ppm.

Description

Technical Field

[0001] The invention belongs to the technical field of dust removal equipment, and in particular relates to a central split-flow cone-type ion wind dust removal device. Background Art

[0002] In the process of producing polyolefin particles in petrochemical enterprises, polyolefin particles need to be transported through a considerable length of pipeline before entering the storage bin. Due to the friction between polyolefin particles (poor conductor of charge) and the metal surface of the equipment (good conductor of charge), the surface of the polyolefin particles is negatively charged, while the metal surface is positively charged. Since metal is a good conductor of charge, and the equipment quickly conducts away the positive charge it carries by grounding, but the negative charge on the surface of the polyolefin particles is accumulated, the law of conservation of charge in the system is destroyed, so it has a certain static electricity phenomenon. This static electricity will not only cause safety accidents of the equipment, but also cause a certain amount of dust to be adsorbed on the surface of the polyolefin particles. The former has long become a key focus of production safety; the influence of the latter has also been manifested in certain defects of plastic products, such as carbonization points in products.

[0003] In the prior art, Chinese utility model patent application CN208084825U discloses an alternating plate type powder remover, the implementation principle of which is as follows: the polyolefin particles with dust enter the powder remover, and first pass through the ion wind generator arranged around the nozzle to eliminate the particle charge; then, the polyolefin particles with dust will flow through two layers of dust removal plates, on which a certain number of vents are arranged, and under the action of the wind from the vents, the dust and polyolefin particles are separated. The dust will leave the powder remover from the air outlet, while the polyolefin particles will leave the powder remover from the discharge port. It is worth noting that the processing capacity of the plate-type powder remover is affected by the width of the dust removal plate. Since the inlet of the equipment is a circular pipeline interface, the inlet section of the equipment needs to convert the circular cross-section flow into a rectangular cross-section flow, otherwise the material cannot be evenly distributed over the entire width of the dust removal plate. This puts forward requirements for the design of the inlet section of the equipment, and when the width of the dust removal plate is high, it is more difficult to achieve. At the same time, the application introduces that ion wind nozzles are evenly arranged around the inlet circumference. When encountering a high-density material flow, it is difficult for the ion wind to enter the center of the material flow, so it is impossible to eliminate the static electricity of the polyolefin particles in the center, thus affecting the powder removal effect in the subsequent links. In addition, the thickness and local density of the material remain unchanged during the process of falling on the powder removal wind action plate, which is not conducive to removing dust at the bottom or core of the material flow.

[0004] Chinese utility model patent application CN208800393U discloses a fluidized bed type powder remover, the working principle of which is: after the material enters the powder remover, it falls back onto the fluidized bed, and dust removal air is introduced into the bottom of the fluidized bed, thereby separating the particles from the dust. It is worth noting that this patent also uses a flat fluidized bed structure, and the above-mentioned problem of achieving uniform distribution of the material flow in the width direction on a wider fluidized bed still exists. In addition, the application does not consider the situation where the material particles are charged.

[0005] Chinese utility model patent application CN203816892U discloses a double-screw auger-type powder remover, the implementation principle of which is: the main auger conveys the dusty material through the main barrel, and the main barrel adopts a porous wall structure. When the diameter of the hole is smaller than the material diameter but larger than the dust diameter, the dust falls to the second auger, thereby achieving the separation of dust and material. It is worth noting that the premise that the dust can fall to the second auger is that it can produce a larger falling speed under the action of gravity. This structure is more suitable for situations where the dust density and particle size are relatively large. Similarly, the application does not consider the situation where the material particles are charged. Summary of the invention

[0006] The purpose of the present application is to provide a central split cone ion wind dust removal device to solve the problem of uneven material thickness distribution caused by the conversion of circular cross-sectional flow into rectangular cross-sectional flow.

[0007] An embodiment of the present invention provides a central split cone ion wind dust removal device, the device comprising:

[0008] A housing, wherein the housing is provided with an exhaust port;

[0009] A material distribution cone, the material distribution cone is arranged in the shell, the material distribution cone comprises a material distribution cone surface, a first dust removal air cavity and a first ventilation pipe connected to the first dust removal air cavity, the material distribution cone surface is used to receive and disperse the material, the material distribution cone surface is provided with a plurality of first ventilation holes, the first ventilation holes are used to blow away the dust of the material, the first ventilation holes are connected to the first dust removal air cavity, and the first ventilation pipe is connected to the air supply unit to supply air to the first dust removal air cavity;

[0010] A feed pipe, the feed pipe is installed on the shell, and a feed port is provided at the lower end of the feed pipe, and the feed port is used to feed the material distribution cone;

[0011] A collecting hopper, which is arranged in the shell and is used to receive the material processed by the dividing cone;

[0012] A discharge pipe is connected to the collecting hopper to discharge materials.

[0013] Optionally, the device further comprises a plurality of first ion wind nozzles, which are installed on the feed pipe to eliminate the charge of the material, and the plurality of first ion wind nozzles are circumferentially distributed around the central axis of the feed pipe.

[0014] Optionally, the device further comprises a plurality of second ion wind nozzles, which are installed in the feed pipe to eliminate the electric charge of the core of the material flow.

[0015] Optionally, the wind flow direction of the second ion wind nozzle is opposite to the material flow direction.

[0016] Optionally, the collecting hopper is provided with a plurality of second ventilation holes, the second ventilation holes are used to blow away dust from the material, the second ventilation holes are connected to a second dust removal air chamber, and the second dust removal air chamber is connected to the air supply unit via a second ventilation pipe.

[0017] Optionally, the second ventilation duct and the first ventilation duct are connected to the same air supply unit.

[0018] Optionally, a switch is provided at the feed port of the feed pipe to adjust the flow rate of the feed port.

[0019] Optionally, the switch is a cylinder, and the cylinder can be slidably sleeved on the feeding pipe along the axis of the feeding pipe.

[0020] Optionally, a partition is provided in the shell, and the partition is used to divide an exhaust channel, and the exhaust channel is connected to the exhaust port.

[0021] Optionally, the central axis of the feed pipe and the distribution cone coincide with each other.

[0022] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0023] The central split cone ion wind dust removal device provided in the embodiment of the present invention comprises a shell, the shell is provided with an exhaust port; a material dividing cone, the material dividing cone is arranged in the shell, the material dividing cone comprises a material dividing cone surface, a first dust removal air cavity and a first ventilation pipe connected to the dust removal air cavity, the material dividing cone surface is used to receive and disperse the material, the material dividing cone surface is provided with a plurality of first ventilation holes, the first ventilation holes are used to blow away the dust of the material, the first ventilation holes are connected to the first dust removal air cavity, the first ventilation pipe is connected to the air supply unit, and the first ventilation hole is connected to the first dust removal air cavity. The first dust removal air chamber is supplied with air; a feed pipe is installed in the shell, a feed port is provided at the lower end of the feed pipe, and the feed port is used to feed the dividing cone; a collecting hopper is arranged in the shell, and the collecting hopper is used to receive the material processed by the dividing cone; a discharge pipe is connected to the collecting hopper to discharge the material; a circular splitter cone powder removal plate is used for powder removal, so that the material is evenly distributed on the dust removal plate, the dust removal effect is good, and the dust content in the polyolefin particles does not exceed 45ppm.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a device provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the internal structure of a device provided in an embodiment of the present invention;

[0028] Figure 3 for Figure 2 A schematic diagram of the front view structure of

[0029] Figure 4 A schematic diagram of the internal cross-sectional structure of a device provided in an embodiment of the present invention;

[0030] Figure markings: 1-shell, 11-exhaust port, 2-dividing cone, 21-dividing cone surface, 22-first dust removal air chamber, 23-first ventilation pipe, 3-feeding pipe, 31-feeding port, 32-switch, 4-collecting hopper, 41-second dust removal air chamber, 42-second ventilation pipe, 5-discharging pipe, 6-first ion wind nozzle, 7-second ion wind nozzle, 8-partition, 81-exhaust channel. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of this application, it should be noted that if relational terms such as "first" and "second" appear, they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0035] In the description of the present application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 on the present application.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0038] According to a typical embodiment of the present invention, a central split cone ion wind dust removal device is provided, the device comprising:

[0039] A housing 1, wherein the housing 1 is provided with an air outlet 11;

[0040] The shell 1 is the outer shell of the entire device, and forms a closed space inside, so that the wind after dust removal can flow through a preset channel, which is convenient for processing the wind after dust removal and avoids unnecessary pollution to the working space.

[0041] A material distribution cone 2, the material distribution cone 2 is arranged in the shell 1, the material distribution cone 2 includes a material distribution cone surface 21, a first dust removal air chamber 22 and a first ventilation pipe 23 connected to the first dust removal air chamber 22, the material distribution cone surface 21 is used to receive and disperse materials, the material distribution cone surface 21 is provided with a plurality of first ventilation holes, the first ventilation holes are used to blow away dust from the materials, the first ventilation holes are connected to the first dust removal air chamber 22, and the first ventilation pipe 23 is connected to an air supply unit to supply air to the first dust removal air chamber 22;

[0042] By using a circular diverter cone powder removal plate, the cylindrical material flow falls onto the tip of the cone, naturally forming a diversion; optimizing the design of the cone angle and the length of the diverter cone busbar of the diverter cone powder removal plate can achieve a greater processing capacity; it should be emphasized that the polygonal cone powder removal plate can also be regarded as an evolution of the circular cone powder removal plate, and technical personnel in this field are motivated to make certain evolutions; under the action of the dust removal wind, the contact friction between the polyolefin particle flow and the diverter cone surface 21 is reduced, and the lighter dust particles will completely leave the main material flow and enter the exhaust port 11 opened in the equipment casing.

[0043] A feed pipe 3, the feed pipe 3 is installed on the housing 1, and a feed port 31 is provided at the lower end of the feed pipe 3, and the feed port 31 is used to feed the material distribution cone 2;

[0044] As an optional embodiment, a switch 32 is provided at the feed port 31 of the feed pipe 3 to adjust the flow rate of the feed port 31. Specifically, the switch 32 is a cylinder, which can be slidably sleeved on the feed pipe 3 along the axis of the feed pipe 3. When the closed cylinder falls down until it contacts the material distribution cone 21, the material flow is closed; the upward movement distance is the opening of the closed cylinder. The larger the opening, the more material enters the device per unit time. The processing capacity of each part of the deduster should match the material flow rate when the closed cylinder is at the maximum opening.

[0045] As an optional embodiment, the device further includes a plurality of first ion wind nozzles 6, which are installed on the feed pipe 3 to eliminate the charge of the material, and the plurality of first ion wind nozzles 6 are circumferentially distributed around the central axis of the feed pipe 3. The charge of the material can be effectively eliminated.

[0046] However, when the material flow is relatively dense, the circumferentially distributed ion wind nozzles are difficult to penetrate the entire material flow, resulting in the inability of the charges in the core of the material flow to escape. For this reason, the device is more optimized and further includes a plurality of second ion wind nozzles 7, which are installed in the feed pipe 3 to eliminate the charges in the core of the material flow. In actual use, the wind flow direction of the second ion wind nozzle 7 is opposite to the material flow direction.

[0047] More optimally, the central axis of the feed pipe 3 coincides with the central axis of the distribution cone 2. With the above design, uniform flow distribution can be achieved.

[0048] A collecting hopper 4, the collecting hopper 4 is arranged in the housing 1, and the collecting hopper 4 is used to receive the material processed by the distributing cone 2;

[0049] As an optional embodiment, the collecting hopper 4 is provided with a plurality of second ventilation holes, which are used to blow away dust from the material. The second ventilation holes are connected to the second dust removal air chamber 41, and the second dust removal air chamber 41 is connected to the air supply unit through the second ventilation pipe 42.

[0050] By adopting the above design, the friction between the material and the collecting hopper 4 will also be reduced, which will improve the conveying efficiency and effectively reduce the secondary friction electrification.

[0051] More optimally, the second ventilation pipe 42 and the first ventilation pipe 23 are connected to the same air supply unit.

[0052] A discharge pipe 5 is connected to the collecting hopper 4 to discharge materials.

[0053] As an optional implementation, a partition plate 8 is provided in the shell 1 , and the partition plate 8 is used to divide an exhaust passage 81 , and the exhaust passage 81 is connected to the exhaust port 11 .

[0054] The following is an example of treating dusty polyolefin particles to explain the whole process:

[0055] The polyolefin particles with dust enter the powder removal device in the form of a cylindrical material flow from the inlet section (i.e., the feed pipe 3). On the circular cross-section pipeline of the inlet section of the powder removal device, a certain number of ion wind nozzles (i.e., the first ion wind nozzle 6) are evenly arranged on the circumference. While the ion wind nozzle sprays ion wind onto the surface particles of the material flow, a number of ion wind nozzles (i.e., the second ion wind nozzle 7) are also arranged in the top area of ​​the diverter cone type powder removal plate installed at the bottom of the inlet section. The direction in which the ion wind nozzle sprays ion wind is opposite to the direction of the main material flow and directly enters the core of the material flow. The combined effect of the two ion wind nozzles can effectively eliminate the charge of polyolefin particles. After the material enters the powder removal device in the form of a cylindrical material flow from the inlet section, it will fall onto the dividing cone surface 21 of the dividing cone 2, thereby realizing diversion. The values ​​of the cone angle of the dividing cone surface 21 and the generatrix length of the dividing cone surface 21 are related to the repose angle of the material and the equipment processing capacity. In order to achieve uniform flow distribution, the center of the material distribution cone 21 should be consistent with the center of the inlet section. The material distribution cone 21 forms a closed space (i.e., the first dust removal air chamber 22) together with the closing plate below it. The space is installed on the cylindrical plate of the equipment housing through a plurality of ventilation pipes (i.e., the first ventilation pipe 23) arranged in a circle. When a certain amount of dust removal wind is passed into the closed space through the ventilation pipe, the dust removal wind will act on the falling polyolefin particle flow through the ventilation holes provided on the diverter cone type powder removal plate. Under the action of the dust removal wind, while the contact friction between the polyolefin particle flow and the diverter cone type powder removal plate is reduced, the dust particles with lighter mass will completely leave the main material flow and enter the annular exhaust port 11 provided on the upper plate (i.e., the partition plate 8) of the equipment housing. The outer plate and the upper plate of the equipment housing form an exhaust channel 81. In order to improve the dust removal efficiency of the exhaust port 11, an exhaust device can be installed on the air outlet of the exhaust channel 81. The polyolefin particles leaving the material distribution cone 21 will fall onto the conical plate (i.e., the collecting hopper 4) at the bottom of the equipment housing in the form of a waterfall flow. A certain number of ventilation holes are also provided on the conical plate. In this way, the friction between the polyolefin particles and the conical plate will also be reduced, which will improve the conveying efficiency while effectively reducing the secondary frictional electrification. The conical plate and the closed plate on its outer side form a bottom ventilation channel. The ventilation inlet of the bottom ventilation channel can share the air source with the ventilation pipe. The polyolefin particles passing through the conical plate leave the de-duster through the outlet section (i.e., the discharge pipe 5). In addition, a closed cylinder that can slide up and down is also installed on the outside of the inlet section. When the closed cylinder falls down until it contacts the diverter cone de-duster plate, the material flow is closed; the upward movement distance is the opening of the closed cylinder. The larger the opening, the more material enters the equipment per unit time. The processing capacity of each part of the de-duster should match the material flow rate at the maximum opening of the closed cylinder.

[0056] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0057] (1) The device provided in the embodiment of the present invention adopts a circular diverter cone type powder removal plate, and the cylindrical material flow falls on the tip of the cone, and naturally forms a diverter. The cone angle of the diverter cone type powder removal plate and the length of the diverter cone generatrix are optimized to achieve a larger processing capacity;

[0058] (2) The device provided in the embodiment of the present invention adopts a composite ion wind injection method of reverse direction at the bottom of the inlet section and circumferential radial direction, which can not only introduce ion wind on the radial surface of the columnar material flow, but also directly introduce ion wind into the core of the material flow, thereby ensuring that polyolefin particles at all locations in the high-density material flow can be effectively electrostatically treated;

[0059] (3) The device provided in the embodiment of the present invention adopts a circular diverter cone type powder removal plate. During the falling process along the diverter cone, the accumulation thickness of the material flow on the powder removal plate gradually decreases, so it is more conducive to the separation of dust inside the material flow.

[0060] Finally, it should be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article, or apparatus.

[0061] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0062] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A central split cone ion wind dust removal device, characterized in that: The device comprises: A housing (1), wherein the housing (1) is provided with an air outlet (11); A material distribution cone (2), the material distribution cone (2) being arranged in the shell (1), the material distribution cone (2) comprising a material distribution cone surface (21), a first dust removal air cavity (22) and a first ventilation pipe (23) connected to the first dust removal air cavity (22), the material distribution cone surface (21) being used to receive and disperse materials, the material distribution cone surface (21) being provided with a plurality of first ventilation holes, the first ventilation holes being used to blow away dust from the materials, the first ventilation holes being connected to the first dust removal air cavity (22), the first ventilation pipe (23) being connected to an air supply unit, being used to supply air to the first dust removal air cavity (22); A feed pipe (3), the feed pipe (3) being mounted on the housing (1), the lower end of the feed pipe (3) being provided with a feed port (31), the feed port (31) being used to feed material to the distribution cone (2); A collecting hopper (4), the collecting hopper (4) being arranged in the shell (1), and the collecting hopper (4) being used to receive the material processed by the distribution cone (2); A discharge pipe (5), the discharge pipe (5) is connected to the collecting hopper (4) for discharging materials; a plurality of first ion wind nozzles (6), wherein the first ion wind nozzles (6) are installed on the feed pipe (3) to eliminate the charge of the material, and the plurality of first ion wind nozzles (6) are circumferentially distributed around the central axis of the feed pipe (3); A plurality of second ion wind nozzles (7), wherein the second ion wind nozzles (7) are installed in the top area of ​​the material distribution cone surface to eliminate the electric charge of the core of the material flow; The wind flow direction of the second ion wind nozzle (7) is opposite to the material flow direction; The collecting hopper (4) is provided with a plurality of second ventilation holes, the second ventilation holes are used to blow away dust from the material, the second ventilation holes are connected to a second dust removal air chamber (41), and the second dust removal air chamber (41) is connected to an air supply unit via a second ventilation pipe (42); A switch (32) is provided at the feed port (31) of the feed pipe (3), wherein the switch (32) is a cylinder, and the cylinder can be slidably sleeved on the feed pipe (3) along the axis of the feed pipe (3); The collecting hopper is an inverted cone plate, and the inverted cone plate and the closed plate on its outer side form a second dust removal air chamber; A partition (8) is provided in the shell (1), and the partition (8) is used to divide an exhaust passage (81), and the exhaust passage (81) is connected to the exhaust port (11).

2. The central split cone ion wind dust removal device according to claim 1 is characterized in that: The second ventilation pipe (42) and the first ventilation pipe (23) are connected to the same air supply unit.

3. The central split cone ion wind dust removal device according to claim 1 is characterized in that: The central axes of the feed pipe (3) and the distribution cone (2) coincide with each other.

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