A cyclone dust collector

Abstract

The present invention belongs to the field of industrial environmental protection, and relates to a cyclone dust collector, including a cylinder, the cylinder including an upper cylindrical section and a lower conical section; the cylindrical section of the cylinder is matched with an air inlet pipe in the tangential direction, the center of the cylindrical section is connected to an exhaust pipe at the end away from the conical section, and the conical section is matched with a dust collecting chamber at the end away from the cylindrical section; a plurality of air flow baffles are arranged circumferentially on the inner wall of the cylinder. The air flow baffles arranged on the inner wall of the cylinder of the present invention greatly reduce the air flow velocity near the inner wall, can reduce the wear of the cylinder by the air flow, and limit the movement of dust particles thrown to the vicinity of the inner wall by centrifugal force. For dust with a smaller particle size, due to the sudden drop in the air flow velocity near the wall surface, the probability of being re-entrained by the air flow and discharged from the cyclone dust collector is greatly reduced, and the critical particle size for removing dust is correspondingly reduced, thereby improving the dust removal efficiency of the cyclone dust collector.

Description

Technical Field

[0001] The invention belongs to the field of industrial environmental protection and relates to a cyclone dust collector. Background Art

[0002] The cyclone dust collector uses the rotational motion of the dust-laden airflow to separate the dust particles from the airflow under the action of centrifugal force. It has the advantages of simple structure, compact equipment, low cost and easy maintenance. It is widely used in metallurgy, chemical industry and other fields.

[0003] The dust removal mechanism of the cyclone dust collector is: the dust in the rotating airflow is thrown to the inner wall of the dust collector cylinder by centrifugal force, and the friction with the wall causes the speed to decrease; the particles with large particle size have large mass, and under the action of gravity and airflow, they rotate along the wall of the cylinder and fall to the dust collecting chamber, while the particles with small particle size have small mass, and they may be rolled up again by the high-speed airflow near the wall and discharged from the exhaust pipe. Therefore, the cyclone dust collector has different dust removal efficiencies for different particle sizes. For dust of a single particle size, large particle size dust can be removed 100%; when the dust particle size is lower than a critical value (i.e., the critical particle size, which is determined by the performance of the cyclone dust collector), the removal efficiency begins to be lower than 100%, and as the particle size decreases, the removal efficiency gradually decreases until it is zero. The dust removal efficiency of the dust collector is the comprehensive removal efficiency of dust of all particle sizes. Reducing the critical particle size can reduce the lower limit of the dust particle size to be removed, thereby improving the dust removal efficiency.

[0004] Due to the rotating airflow and dust in the cyclone dust collector, the equipment cylinder is prone to wear, especially the dust separated by centrifugal force is first concentrated on the cylinder wall, and moves and rubs along the wall with the action of airflow and gravity, which can cause serious wear over time. Therefore, properly limiting the movement of dust on the wall can effectively reduce wear. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a cyclone dust collector to improve dust removal efficiency and reduce wear on the inner wall of the dust collector.

[0006] To achieve the above object, the present invention provides the following technical solution: a cyclone dust collector, comprising a cylinder, the cylinder comprising an upper cylindrical section and a lower conical section;

[0007] The cylindrical section of the cylinder is matched with an air inlet pipe in the tangential direction, the center of the cylindrical section is connected to an exhaust pipe at one end away from the conical section, and the conical section is matched with a dust collecting chamber at one end away from the cylindrical section;

[0008] A plurality of airflow baffles are arranged circumferentially on the inner wall of the cylinder.

[0009] Optionally, the cylindrical section and the conical section are an integrally formed structure.

[0010] Optionally, the exhaust pipe is inserted into the cylindrical section, and its insertion depth does not exceed the conical section.

[0011] Optionally, the access height of the air intake pipe is higher than the insertion depth position of the air intake pipe.

[0012] Optionally, the air flow baffle is perpendicular to the inner wall of the cylinder and fixedly installed along the height direction of the overall dust collector.

[0013] Optionally, a plurality of air flow baffles are evenly arranged along the circumferential direction and avoid the area where the air inlet pipe is connected to the cylinder.

[0014] The beneficial effects of the present invention are:

[0015] The airflow baffle arranged on the inner wall of the cylinder of a cyclone dust collector of the present invention greatly reduces the airflow velocity near the inner wall, which can reduce the wear of the cylinder by the airflow, and more importantly, limits the movement of dust particles thrown to the vicinity of the inner wall by centrifugal force. For dust with a smaller particle size, due to the sudden drop in the airflow velocity near the wall surface, the probability of being re-involved in and discharged from the cyclone dust collector by the airflow is greatly reduced, and the critical particle size for removing dust is correspondingly reduced, thereby improving the dust removal efficiency of the cyclone dust collector; for dust moving near the wall surface, due to the obstruction of the airflow baffle, the circumferential movement of these dust particles under the action of the airflow is restricted, and they will fall to the bottom dust collecting chamber along the baffle and the nearby inner wall under the action of gravity, thereby reducing the circumferential movement friction between the dust and the wall surface, and reducing the wear of the cylinder of the cyclone dust collector.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 It is a schematic diagram of the overall structure of a cyclone dust collector of the present invention;

[0019] Figure 2 The figure is a cross-sectional top view of a cyclone dust collector according to the present invention.

[0020] Reference numerals: cylinder 1, air inlet pipe 2, exhaust pipe 3, dust collecting chamber 4, air flow baffle 5. DETAILED DESCRIPTION

[0021] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0023] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Specific embodiment 1,

[0025] See also Figure 1-2, is a cyclone dust collector, characterized in that: it includes a barrel 1, the barrel 1 includes an upper cylindrical section and a lower conical section, the cylindrical section and the conical section are an integrally formed structure; the cylindrical section of the barrel 1 is matched with an air inlet pipe 2 in the tangential direction, the access height of the air inlet pipe 2 is higher than the insertion depth of the air inlet pipe 2, the center of the cylindrical section is connected to an exhaust pipe 3 at one end away from the conical section, the exhaust pipe 3 is inserted into the cylindrical section, and its insertion depth does not exceed the conical section, and the conical section is matched with a dust collecting chamber 4 at one end away from the cylindrical section; the barrel A number of air flow baffles 5 are arranged circumferentially on the inner wall of the body 1, and all avoid the area where the air inlet pipe 2 is connected to the cylinder 1. The air flow baffles 5 are perpendicular to the inner wall of the cylinder 1 and are fixedly installed along the height direction of the overall dust collector. The arm length m of each air flow baffle 5 along the inner wall of the cylinder 1 perpendicular to the cylinder 1 cannot be too long, otherwise it will affect the main vortex structure inside the dust collector, and it cannot be too short, otherwise the vortex speed cannot be fully reduced near the wall of the cylinder 1. The arm length m is controlled between 1 / 5 and 1 / 15 of the radius size R of the cylinder 1.

[0026] In this embodiment, the cyclone dust collector barrel 1 has a diameter of 700 mm and a relatively small volume. Four airflow baffles 5 are installed along the circumferential direction of the inner wall of the barrel 1. The installation position avoids the area where the air inlet pipe 2 is connected to the barrel 1. The air inlet pipe 2 is connected to the barrel 1 at 90°-150° along the circumference of the barrel 1. The airflow baffles 5 are respectively arranged at 75°, 165°, 255°, and 345° of the circumference of the barrel 1. Figure 2 .

[0027] In this embodiment, the air flow baffle 5 is a common straight plate, and its arm length m is preferably 1 / 10 of the radius R of the cylinder 1, at which time the dust removal effect is the best.

[0028] Specific embodiment 2,

[0029] The difference from specific embodiment 1 is that, in this embodiment, the airflow baffle 5 is in an "L" shape, which includes a long arm perpendicular to the inner wall of the cylinder 1, and a short arm at the end of the long arm away from the inner wall of the cylinder 1. The function of the short arm is to prevent the dust gathered on the windward side of the airflow baffle 5 from entering the main vortex of the dust collector along the end of the long arm. At the same time, in this embodiment, the "L"-shaped airflow baffle 5 is uniformly installed with the short arm facing the airflow direction in the cylinder, and the short arm size n is set to 1 / 2 of the long arm size m.

[0030] In this embodiment, the preferred length of the long arm is 1 / 10 of the radius R of the cylindrical body 1, at which point the dust removal effect is optimal.

[0031] Table 1 shows the critical particle size obtained by simulation under different baffle schemes of a cyclone dust collector of the present invention (the dust removal efficiency of a cyclone dust collector is the weighted value of the dust removal rate of different particle sizes according to the particle size ratio. This indicator will change with the change of the particle size ratio in the dust. Therefore, in related studies, the critical particle size or the removal rate curve of dust of different particle sizes is usually used as a performance indicator). It can be seen that the airflow baffle 5 adopts the schemes in specific embodiment 1 and specific embodiment 2 respectively, and the critical particle size is the lowest and the effect is the best; at the same time, the application results in production practice show that compared with traditional cyclone dust collectors, its comprehensive dust removal efficiency is improved by at least 20%, and wear is reduced, and the service life is significantly extended.

[0032] Table 1

[0033] Airflow baffle form Partition size (cylinder radius R) Critical particle size (micrometers) No partition 8 Vertical partition m=R / 5 7 Vertical partition m=R / 10 6 Vertical partition m=R / 12 7 Vertical partition m=R / 15 8 L-Shaped Partition m=R / 5,n=R / 10 6 L-Shaped Partition m=R / 10,n=R / 20 4 L-Shaped Partition m=R / 12,n=R / 30 7

[0034] The airflow baffle arranged on the inner wall of the cylinder of the present invention greatly reduces the airflow velocity near the inner wall, which can reduce the wear of the cylinder by the airflow, and more importantly, limits the movement of dust particles thrown to the vicinity of the inner wall by centrifugal force. For dust with smaller particle size, due to the sudden drop in airflow velocity near the wall surface, the probability of being re-involved in the cyclone dust collector by the airflow and discharged is greatly reduced, and the critical particle size for removing dust is correspondingly reduced, thereby improving the dust removal efficiency of the cyclone dust collector; for dust moving near the wall surface, due to the obstruction of the airflow baffle, the circumferential movement of these dust particles under the action of the airflow is restricted, and they will fall to the bottom dust collecting chamber along the baffle and the nearby inner wall under the action of gravity, thereby reducing the circumferential movement friction between the dust and the wall surface, and reducing the wear of the cylinder of the cyclone dust collector.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A cyclone dust collector, characterized in that: The invention comprises a cylinder body, wherein the cylinder body comprises an upper cylindrical section and a lower conical section; the cylindrical section of the cylinder body is matched with an air inlet pipe in a tangential direction, the center of the cylindrical section is connected with an exhaust pipe at an end away from the conical section, and the conical section is matched with a dust collecting chamber at an end away from the cylindrical section; a plurality of air flow baffles are arranged circumferentially on the inner wall of the cylinder body; the air flow baffles are perpendicular to the inner wall of the cylinder body and are fixedly installed along the height direction of the overall dust collector; the plurality of air flow baffles are evenly arranged circumferentially and avoid the area where the air inlet pipe is connected to the cylinder body; The arm length m of each air flow baffle perpendicular to the cylinder along the inner wall of the cylinder is controlled to be between 1 / 5 and 1 / 15 of the cylinder radius R; The airflow baffle is in an "L" shape, comprising a long arm perpendicular to the inner wall of the cylinder (1), and a short arm at one end of the long arm away from the inner wall of the cylinder. The "L"-shaped airflow baffle (5) is uniformly installed with the short arm facing the airflow direction in the cylinder, and the size n of the short arm is set to 1 / 2 of the size m of the long arm.

2. A cyclone dust collector according to claim 1, characterized in that: The cylindrical section and the conical section are an integrally formed structure.

3. A cyclone dust collector according to claim 1, characterized in that: The exhaust pipe is inserted into the cylindrical section, and its insertion depth does not exceed that of the conical section.

4. A cyclone dust collector according to claim 3, characterized in that: The access height of the air intake pipe is higher than the insertion depth position of the air intake pipe.

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