A bag dust removal device and a dust removal method in mineral sample preparation

Abstract

The application provides a bag dust removal equipment and method in mineral sample preparation, relates to the technical field of bag dust removal, and comprises a bag dust remover main body, an air outlet pipe group, a controllable flow interception assembly and a backflow cleaning assembly. Through the design of the controllable flow interception assembly and the backflow cleaning assembly, part of airflow in the dust removal process of the bag dust remover main body can be guided into the backflow cleaning assembly, the vortex-induced vibration assembly of the backflow cleaning assembly is driven to vibrate, and the vortex-induced vibration assembly directly acts in the interior of the bag dust remover main body, is easy to transfer and act on the cylindrical bag of the bag dust remover main body, and the cleaning work of the cylindrical bag can be completed through low-power vibration; compared with the traditional pulse reverse circulation method for cleaning the bag, the application does not need to stop the dust removal work process.

Description

Technical Field

[0001] This invention relates to the field of baghouse dust collection technology, specifically to a baghouse dust collection device and dust collection method for mineral sample preparation. Background Technology

[0002] In the development and utilization of mineral resources, sample preparation is a core step in ensuring the accuracy of ore quality analysis, involving processes such as crushing, screening, grinding, and fractionation. However, these physical processing steps inevitably generate a large amount of dust, especially since mineral particles are characterized by wide particle size distribution, high density, and easy dispersion. The dispersion of dust not only poses a threat to the respiratory health of operators but also pollutes the workshop environment, affects the stability of precision instruments, and may even lead to cross-contamination of samples, reducing the reliability of test results.

[0003] Baghouse dust collectors are one of the methods for dust control. They mainly capture particulate matter in the dust-laden airflow through filter bags and collect dust inside the casing. After a period of use, dust accumulates on the surface of the filter bags, affecting airflow and reducing dust collection efficiency. Therefore, the filter bags need to be cleaned regularly. Currently, there are two common methods: First, reverse airflow (pulse airflow) impacts the filter bags, causing dust to detach from the filter bag surface. This process requires the equipment to be shut down and must be done at a specific time, which may affect normal operation. Second, an additional vibration device is used to vibrate the filter bags to remove dust from the filter bag surface. However, ordinary vibration devices cannot be placed inside the baghouse dust collector for extended periods (the inside of the baghouse dust collector is constantly exposed to dust). Furthermore, the vibration transmitted from the baghouse dust collector casing to the filter bags is not very effective, or the required vibration device has high power and long operating time, leading to inconvenience and high operating costs. Therefore, this invention provides a baghouse dust collector and dust removal method for mineral sample preparation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a baghouse dust collector and dust removal method for mineral sample preparation, solving the problems of traditional baghouse dust collectors requiring shutdown / inconvenient use and high operating costs when cleaning dust accumulation on the surface of filter bags.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A bag filter dust collector for mineral sample preparation includes:

[0007] The main body of the bag filter dust collector has an air outlet duct assembly on its side, which includes: a pipe and an adjustable flow centrifugal fan installed on the pipe.

[0008] A controllable flow-cutting component, the controllable flow-cutting component having a first air inlet, a first air outlet, and a second air outlet, the first air inlet being connected to the first air outlet, the first air inlet and the second air outlet being controllably connected / cut off, and the first air inlet being connected to the air outlet end of the air outlet duct assembly;

[0009] The return cleaning assembly includes: a guide pipe and a vortex vibration assembly. The vortex vibration assembly is arranged inside the main body of the bag filter. The first end of the guide pipe is connected to the second air outlet, and the second end of the guide pipe is connected to the vortex vibration assembly.

[0010] Preferably, the main body of the bag filter includes:

[0011] The main housing has an opening at its top and a guide section at its bottom. A dust collection port is fixedly provided at the bottom end of the guide section, and a gas inlet is fixedly provided on the side of the main housing.

[0012] The top cover is fixedly installed on the top of the main housing, and a gas outlet is fixedly provided on the top of the top cover;

[0013] A tubular cloth bag has a top mounting plate sealed and fixedly installed on the inner side of the main shell and near the top opening of the main shell. The top mounting plate has mounting holes that are the same number as the tubular cloth bags. A ring-shaped piece is fixedly installed at the top of the tubular cloth bag and is fixedly engaged inside the mounting hole.

[0014] The bottom support plate is installed on the inner side of the main housing via an elastic frame. The bottom support plate is provided with dust collection holes. A metal head corresponding to a cylindrical cloth bag is fixedly installed on the top of the bottom support plate. The top of the metal head is provided with a flat-top cone. The bottom end of the cylindrical cloth bag is fixedly installed to the flat-top cone with screws.

[0015] The vortex-induced vibration assembly is installed at the bottom of the base plate.

[0016] Preferably, the elastic frame includes: a bottom frame, a top frame, and an elastic filler located between the bottom frame and the top frame, wherein one end of the bottom frame is fixedly connected to one end of the top frame.

[0017] Preferably, the controllable flow interception component includes:

[0018] The outer tube body has a retractable connector at its bottom. The bottom end of the retractable connector is the first air inlet. The bottom end of the retractable connector is connected to the air outlet end of the air outlet pipe assembly. The first air outlet is located on the side of the outer tube body.

[0019] The top plate is fixedly installed on the inner side of the outer tube body. The top plate has a through hole, and a sealing ring is fixedly installed on the inner side of the through hole.

[0020] The inner tube is located inside the outer tube and its top end is fixedly connected to the top plate. The sealing ring corresponds to the center of the inner tube. The side of the inner tube is fixedly connected to the second air outlet, which extends through the side wall of the outer tube to the outside of the outer tube.

[0021] The flow-cutting cone has a non-fixed mating seat connected to the inner side of the inner tube near the bottom. The mating seat has a conical hole at its center. The flow-cutting cone is located inside the conical hole. The flow-cutting cone is a shell component. The conical side of the flow-cutting cone has a side air hole. The bottom surface of the flow-cutting cone has a bottom air hole.

[0022] An electric drive telescopic component is inverted and fixedly installed at the top of the outer tube body, with the telescopic end of the electric drive telescopic component located inside the outer tube body.

[0023] The transmission rod is slidably installed inside the sealing ring, and the top end of the transmission rod is fixedly installed with the telescopic end of the electric drive telescopic component, and the bottom end of the transmission rod is fixedly installed with the top end of the throttling cone.

[0024] Preferably, the connection between the first air outlet and the outer tube is located on the outside of the inner tube.

[0025] Preferably, the drainage pipe includes: a guide pipe section, a manifold section, and a secondary branch pipe section connected in sequence. The secondary branch pipe section is fixedly connected to the main shell, and one end of the secondary branch pipe section is located inside the main shell. One end of the secondary branch pipe section is connected to the vortex-induced vibration assembly.

[0026] Preferably, multiple sets of the secondary branch pipe section and the vortex-induced vibration assembly are provided.

[0027] Preferably, the vortex-induced vibration assembly includes:

[0028] A square tube channel, wherein a vertically arranged guide hole is provided on the side of the square tube channel;

[0029] A sliding shaft is slidably mounted on the inside of a guide hole, and a cylinder is fixedly connected to the sliding shaft and located inside the square tube channel.

[0030] A spring is provided, and a side plate is fixedly installed on the outside of the square tube channel. One end of the spring is fixedly connected to the side plate, and the other end of the spring is fixedly connected to the sliding shaft.

[0031] Preferably, multiple sets of the guide hole, sliding shaft, cylinder, spring, and side plate are provided along the length direction of the square tube channel.

[0032] A dust removal method, using the bag filter dust collector described above in mineral sample preparation, specifically includes the following steps:

[0033] Dust removal operation

[0034] The controllable flow centrifugal fan of the outlet duct group is operated when the first air inlet and the second air outlet are cut off, driving the dust-laden airflow through the main body of the bag filter. The dust-laden airflow is removed from the main body of the bag filter. The clean airflow after dust removal passes through the area between the first air inlet and the first air outlet of the outlet duct group and the controllable interception component and is discharged from the first air outlet.

[0035] Cloth bag cleaning

[0036] During dust removal operations, the first air inlet and the second air outlet are connected, and the power of the adjustable flow centrifugal fan is increased. Simultaneously, during the dust removal process, part of the clean airflow after dust removal passes through the area between the first air inlet and the second air outlet of the controllable interception component, and then enters the return cleaning component from the second air outlet. The vortex-induced vibration component is then driven to vibrate, cleaning the filter bags of the bag filter body. The airflow after the vortex-induced vibration component is driven to vibrate passes through the bag filter body and the air outlet duct group again during the dust removal process and enters the controllable interception component.

[0037] This invention provides a baghouse dust collector and a dust removal method for mineral sample preparation. It has the following beneficial effects:

[0038] 1. This invention, through the design of a controllable interception component and a recirculation cleaning component, can guide a portion of the airflow during the dust removal process of the bag filter into the recirculation cleaning component, driving the vortex-induced vibration component of the recirculation cleaning component to vibrate. The vortex-induced vibration component acts directly inside the bag filter body, easily transmitting and acting on the cylindrical filter bags of the bag filter body. Low-power vibration can complete the cleaning of the cylindrical filter bags. Compared with the traditional method of cleaning filter bags using pulse reverse circulation, it does not require stopping the dust removal process. Compared with arranging the vibration device outside the bag filter body, it is located inside the bag filter body, resulting in better performance. Moreover, it can rely on small-amplitude vibration to act directly on the cylindrical filter bags of the bag filter body, reducing damage to the bag filter body. Furthermore, it does not require an additional power source, can be operated at any time, and has good performance. The absence of an additional power source and vibration device also reduces costs.

[0039] 2. This invention, through a specific design of the arrangement and installation structure of the cylindrical filter bags inside the main body of the bag filter, uses a top mounting plate and a bottom support plate to tension and fix the cylindrical filter bags at both ends. The vortex-induced vibration component is installed at the bottom of the bottom support plate. This structural design facilitates the transmission of vibration and ensures the cleaning effect of the cylindrical filter bags. Attached Figure Description

[0040] Figure 1This is a perspective view of a bag filter dust collector for mineral sample preparation proposed in this invention.

[0041] Figure 2 This is a front view of a bag filter dust collector for mineral sample preparation proposed in this invention.

[0042] Figure 3 This is a top view of a bag filter dust collector for mineral sample preparation proposed in this invention.

[0043] Figure 4 This is a side view of a bag filter dust collector for mineral sample preparation proposed in this invention.

[0044] Figure 5 for Figure 2 Cross-sectional view of section line AA in the middle;

[0045] Figure 6 for Figure 5 Enlarged view of a portion of point C in the middle;

[0046] Figure 7 for Figure 4 A sectional view of the section line at point BB;

[0047] Figure 8 This is a schematic diagram of the bag distribution in a bag filter dust collector for mineral sample preparation proposed in this invention.

[0048] Figure 9 This is a schematic diagram of the bag distribution in a bag filter dust collector for mineral sample preparation proposed in this invention.

[0049] Figure 10 for Figure 9 Enlarged view of a portion at point D;

[0050] Figure 11 This is a schematic diagram of the bag installation in a bag filter dust collector for mineral sample preparation proposed in this invention.

[0051] Figure 12 This is a three-dimensional schematic diagram of the reflux cleaning component of a bag filter dust collector in mineral sample preparation proposed in this invention.

[0052] Figure 13 This is a three-dimensional schematic diagram of the vortex-induced vibration component of a bag filter dust collector in mineral sample preparation proposed in this invention.

[0053] Figure 14 for Figure 13 Enlarged view of a portion at point E in the middle;

[0054] Figure 15 This is a three-dimensional schematic diagram of the intercepting cone and mating seat of a bag filter dust collector for mineral sample preparation proposed in this invention.

[0055] The components include: 1. Baghouse dust collector body; 101. Main shell; 101a. Guide section; 102. Dust collection port; 103. Top cover; 104. Gas inlet; 105. Gas outlet; 106. Top mounting plate; 107. Cylindrical filter bag; 107a. Annular component; 108. Metal head; 108a. Flat-top conical head; 109. Bottom support plate; 1010. Flexible frame; 1010a. Bottom frame; 1010b. Top frame; 1010c. Flexible filler; 2. Exhaust duct assembly; 201. Pipe; 202. Adjustable flow centrifugal fan; 3. Return cleaning assembly; 301. Guide pipe section; 30 2. Manifold section; 303. Secondary branch pipe section; 304. Vortex-induced vibration assembly; 304a. Square tube channel; 304b. Guide hole; 304c. Sliding shaft; 304d. Cylinder; 304e. Side plate; 304f. Spring; 4. Controllable choke assembly; 401. Outer pipe body; 402. Retractable joint; 403. First air outlet; 404. Top plate; 405. Sealing ring; 406. Electrically driven telescopic component; 407. Second air outlet; 408. Inner pipe body; 409. Transmission rod; 4010. Fitting seat; 4011. Choke cone; 4011a. Side air hole; 4011b. Bottom air hole. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0057] like Figure 1 - Figure 15 As shown, this embodiment of the invention provides a bag filter dust collector for mineral sample preparation, used to clean / collect dust generated during crushing, screening, grinding, and reduction processes in mineral sample preparation. Specifically, it includes: a bag filter body 1, an exhaust duct assembly 2, a controllable interception assembly 4, and a return cleaning assembly 3, which can realize normal dust removal operation and bag cleaning process.

[0058] Specifically, the side of the bag filter body 1 is provided with an air outlet duct assembly 2. The air outlet duct assembly 2 includes: a pipe 201 and an adjustable flow centrifugal fan 202 installed on the pipe 201. The adjustable flow centrifugal fan 202 provides power to drive the airflow through the air outlet duct assembly 2, thereby attracting the airflow inside the bag filter body 1 and forming gas flow inside the bag filter body 1. The gas inlet of the bag filter body 1 is connected to a gas collection pipe, which sends the collected gas carrying dust into the bag filter body 1. Depending on the length of the gas collection pipe, a booster fan can be installed on the gas collection pipe. The ultimate purpose is to... To ensure smooth airflow through the main body 1 of the bag filter for dust removal, the controllable flow interception component 4 has a first air inlet, a first air outlet 403, and a second air outlet 407. The first air inlet and the first air outlet 403 are connected, and the connection / closure between the first air inlet and the second air outlet 407 is controllable. The first air inlet is connected to the outlet end of the exhaust duct assembly 2. During normal dust removal operations, the airflow from the exhaust duct assembly 2 passes through the area between the first air inlet and the first air outlet 403 and exits from the first air outlet 403. Therefore, the controllable flow interception component 4 only serves as a general channel. The return cleaning component 3 includes... The system consists of a guide pipe and a vortex-induced vibration assembly 304. The vortex-induced vibration assembly 304 is located inside the main body 1 of the bag filter. The first end of the guide pipe is connected to the second air outlet 407, and the second end of the guide pipe is connected to the vortex-induced vibration assembly 304. During bag cleaning, the channel between the first air inlet and the second air outlet 407 is opened. Part of the clean airflow from the outlet end of the air outlet duct group 2 is guided through the area between the first air inlet and the second air outlet 407, and flows into the guide pipe from the second air outlet 407. The clean airflow passes through the vortex-induced vibration assembly 304 and enters the main body 1 of the bag filter. This process drives the vortex-induced vibration assembly 304. The vibration of component 304 vibrates the interior of the bag filter body 1, acting on the cylindrical filter bags 107 of the bag filter body 1 to clean them. Compared with the traditional pulse reverse circulation method for cleaning the filter bags, it does not require stopping the dust collection process. Compared with arranging the vibration device on the outside of the bag filter body 1, it is located inside the bag filter body 1, which has a better effect. Moreover, it can directly act on the cylindrical filter bags 107 of the bag filter body 1 with small amplitude vibration, reducing damage to the bag filter body 1. In addition, it does not require an additional power source and can be operated at any time with good results.

[0059] During dust removal operations, the first air inlet and the second air outlet 407 are shut off, and the adjustable flow centrifugal fan 202 of the outlet duct assembly 2 operates, driving the dust-laden airflow through the bag filter body 1. The dust-laden airflow is then filtered within the bag filter body 1. The cleaned airflow passes through the area between the first air inlet and the first air outlet 403 of the outlet duct assembly 2 and the controllable interception component 4, and is discharged from the first air outlet 403. When bag cleaning is required, the first air inlet and the second air outlet 407 are shut off during dust removal operations. 07 is connected, and the power of the adjustable flow centrifugal fan 202 is increased. During the dust removal operation, part of the clean airflow after dust removal passes through the area between the first air inlet and the second air outlet 407 of the controllable interception component 4, and then enters the return cleaning component 3 from the second air outlet 407. Then, the vortex vibration component 304 is driven to vibrate to clean the filter bags of the bag dust collector body 1. The airflow after the vortex vibration component 304 is driven to vibrate passes through the bag dust collector body 1 and the air outlet duct group 2 again during the dust removal operation and enters the controllable interception component 4.

[0060] The power calculation process for increasing the adjustable flow centrifugal fan 202 is based on the predetermined working flow Q1 of the bag filter body 1 and the area between the first air inlet and the second air outlet 407 of the controllable interception component 4. Then, it enters the return cleaning component 3 from the second air outlet 407, and then enters the circulating working flow Q2 of the controllable interception component 4 through the bag filter body 1 and the air outlet duct group 2. This increases the power of the adjustable flow centrifugal fan 202 so that the flow rate Q it generates is not less than Q1 + Q2.

[0061] In one embodiment, the main body 1 of the bag filter includes: a main housing 101, a top cover 103, a cylindrical filter bag 107, a top mounting plate 106, a metal head 108, a bottom support plate 109, and an elastic frame 1010.

[0062] The main housing 101 has an opening at the top for easy installation of internal components. A guide section 101a is located at the bottom of the main housing 101. The guide section 101a has an inclined, tapering structure to facilitate dust collection. A dust collection port 102 is fixedly installed at the bottom of the guide section 101a. During use, a dust collection cylinder is installed at the dust collection port 102 / inserted into a water tank to collect the dust falling from the dust collection port 102. A gas inlet 104 is fixedly installed on the side of the main housing 101, connecting to the outlet of a dust collection system designed within the factory. A top cover 103 is fixedly installed at the top of the main housing 101, forming a chamber with the main housing 101. A gas outlet 105 is fixedly installed at the top of the top cover 103, through which the cleaned gas is discharged. A top cover is sealed and fixedly installed on the inner side of the main housing 101 near the top opening. The top mounting plate 106 has mounting holes in the same number as the cylindrical cloth bags 107. A ring-shaped piece 107a is fixedly installed at the top of each cylindrical cloth bag 107, and the ring-shaped piece 107a is fixedly engaged inside the mounting hole. The bottom support plate 109 is mounted inside the main housing 101 via an elastic frame 1010, enabling the bottom support plate 109 to transmit / amplify elastic vibrations. Dust collection holes are provided on the bottom support plate 109, generally on the outer side. Dust collection holes are also formed between the main housing 101 and the inner side of the main housing 101. Dust falls from the dust collection holes. Metal heads 108 corresponding to the cylindrical cloth bags 107 are fixedly installed on the top of the bottom support plate 109. A flat-top cone head 108a is provided on the top of the metal head 108. The bottom end of the cylindrical cloth bag 107 is fixedly installed to the flat-top cone head 108a by screws. The metal head 108 directly transmits vibration to the cylindrical cloth bag 107. The vortex-induced vibration assembly 304 is installed at the bottom of the bottom support plate 109.

[0063] During dust removal, the airflow carrying dust flows into the main housing 101 and the area below the top mounting plate 106 through the gas inlet 104. The airflow needs to pass through the cylindrical filter bag 107 to enter the area above the top mounting plate 106, thus filtering the dust-carrying gas. The dust falls / adheres to the side of the cylindrical filter bag 107, and the filtered clean gas is discharged upward through the gas outlet 105. During the bag cleaning process, the vortex-induced vibration component 304 vibrates, acting on the bottom support plate 109. Since the bottom support plate 109 is installed inside the main housing 101 using an elastic frame 1010, the bottom support plate 109 can transmit / amplify the elastic vibration and drive the metal head 108 to vibrate, thereby driving the cylindrical filter bag 107 to vibrate and shake off the dust adhering to the outer surface of the cylindrical filter bag 107, thus cleaning the dust on the outer surface of the cylindrical filter bag 107.

[0064] In one embodiment, the elastic frame 1010 includes: a bottom frame 1010a, a top frame 1010b, and an elastic filler 1010c located between the bottom frame 1010a and the top frame 1010b, with one end of the bottom frame 1010a fixedly connected to one end of the top frame 1010b.

[0065] The bottom frame 1010a and the top frame 1010b can be formed by bending a set of sheet-like strip metal parts, and an elastic filler 1010c is glued between the bottom frame 1010a and the top frame 1010b. The resulting elastic frame 1010 has good elasticity and can prevent vibration from being transmitted to the inner wall of the main housing 101.

[0066] In one embodiment, the controllable flow-stopping component 4 is composed of a three-way pipe and a shut-off valve, with the shut-off valve installed on the branch where the second air outlet 407 is located.

[0067] In one embodiment, the controllable flow-stopping assembly 4 includes: an outer tube 401, a top plate 404, a sealing ring 405, an inner tube 408, a flow-stopping cone 4011, an electrically driven telescopic component 406, and a transmission rod 409.

[0068] A retractable connector 402 is provided at the bottom of the outer pipe body 401. The bottom end of the retractable connector 402 is the first air inlet and is connected to the air outlet end of the air outlet duct assembly 2. The first air outlet 403 is provided on the side of the outer pipe body 401. The top plate 404 is fixedly installed on the inner side of the outer pipe body 401. A through hole is provided on the top plate 404, and a sealing ring 405 is fixedly installed on the inner side of the through hole. The inner pipe body 408 is located inside the outer pipe body 401, and the top end of the inner pipe body 408 is fixedly connected to the top plate 404. The sealing ring 405 corresponds to the center of the inner pipe body 408. A second air outlet 407 is fixedly connected to the side of the inner pipe body 408. The second air outlet 407 extends through the side wall of the outer pipe body 401 to the outer side of the outer pipe body 401. A mating seat 4010 is non-fixedly connected to the inner side of the inner tube 408 near the bottom. A tapered hole is provided in the center of the mating seat 4010. A flow-cutting cone 4011 is provided inside the tapered hole. The flow-cutting cone 4011 is a shell component. A side air hole 4011a is provided on the tapered side of the flow-cutting cone 4011. A bottom air hole 4011b is provided on the bottom surface of the flow-cutting cone 4011. An electric drive telescopic component 406 is inverted and fixedly installed at the top of the outer tube 401. The telescopic end of the electric drive telescopic component 406 is located inside the outer tube 401. A transmission rod 409 is slidably installed inside the sealing ring component 405. The top of the transmission rod 409 is fixedly installed with the telescopic end of the electric drive telescopic component 406. The bottom of the transmission rod 409 is fixedly installed with the top of the flow-cutting cone 4011.

[0069] The electric drive telescopic component 406 drives the transmission rod 409 to move downward, thereby driving the throttling cone 4011 to move downward. A gap is formed between the side of the throttling cone 4011 and the inner side of the mating seat 4010, through which gas can flow into the inner tube 408 and then into the second outlet port 407. In order to capture a larger flow rate, the tapered side of the throttling cone 4011 is provided with a side air hole 4011a, and the bottom surface of the throttling cone 4011 is provided with a bottom air hole 4011b. The bottom surface of the throttling cone 4011 is a large plane, which can contact more airflow. The airflow enters the interior of the throttling cone 4011 through the bottom air hole 4011b, and then flows into the inner tube 408 from the side air hole 4011a on the side of the throttling cone 4011.

[0070] In one embodiment, the connection between the first air outlet 403 and the outer tube 401 is located outside the inner tube 408, so as to ensure that the airflow received at the bottom of the inner tube 408 is larger, and then the airflow is diverted to the annular area between the inner tube 408 and the outer tube 401.

[0071] In one embodiment, the drainage tube includes a guide tube section 301, a manifold section 302, and a secondary branch section 303 connected in sequence. The secondary branch section 303 is fixedly connected to the main housing 101, and one end of the secondary branch section 303 is located inside the main housing 101. One end of the secondary branch section 303 is connected to the vortex-induced vibration assembly 304.

[0072] In one embodiment, multiple sets of the secondary branch pipe section 303 and the vortex-induced vibration assembly 304 are provided to improve the vibration effect (designed according to the number of tubular cloth bags 107).

[0073] Vortex-induced vibration (VIV) works by placing a blunt body (cylinder) inside a pipe. As the airflow passes around the blunt body, it generates periodic vortices (Karman vortex streets), which in turn cause vibrations in the downstream flexible structure.

[0074] In one embodiment, the vortex-induced vibration assembly 304 includes: a square tube channel 304a, a sliding shaft 304, a cylinder 304d, a spring 304f, and a side plate 304e.

[0075] A vertically arranged guide hole 304b is provided on the side of the square tube channel 304a. A sliding shaft 304 is slidably installed inside the guide hole 304b. A cylinder 304d is fixedly connected to the sliding shaft 304 and located inside the square tube channel 304a. A side plate 304e is fixedly installed on the outside of the square tube channel 304a. One end of a spring 304f is fixedly connected to the side plate 304e, and the other end of the spring 304f is fixedly connected to the sliding shaft 304.

[0076] When the airflow passes through the square tube channel 304a and encounters the cylinder 304d, it generates vortex-induced vibration. The cylinder 304d and the sliding shaft 304 vibrate up and down. The square tube channel 304a has a small volume, and the vortex-induced vibration can drive the square tube channel 304a to vibrate.

[0077] In one embodiment, multiple sets of guide holes 304b, sliding shafts 304, cylinders 304d, springs 304f, and side plates 304e are arranged along the length of the square tube channel 304a to improve the vibration effect (designed according to the number of tubular bags 107). Example

[0078] This embodiment provides a dust removal method using the bag filter dust collector from the mineral sample preparation method in Embodiment 1, specifically including the following steps:

[0079] Dust removal operation

[0080] When the first air inlet and the second air outlet 407 are cut off, the adjustable flow centrifugal fan 202 of the air outlet duct group 2 operates, driving the dust-laden airflow through the bag filter body 1. The dust-laden airflow is cleaned inside the bag filter body 1. The cleaned airflow passes through the area between the first air inlet and the first air outlet 403 of the air outlet duct group 2 and the controllable interception component 4, and is discharged from the first air outlet 403.

[0081] Cloth bag cleaning

[0082] During dust removal operations, the first air inlet and the second air outlet 407 are connected, and the power of the adjustable flow centrifugal fan 202 is increased. Simultaneously, during the dust removal process, part of the clean airflow after dust removal passes through the area between the first air inlet and the second air outlet 407 of the controllable interception component 4, and then enters the return cleaning component 3 from the second air outlet 407. Then, the vortex-induced vibration component 304 is driven to vibrate, cleaning the filter bags of the bag filter body 1. The airflow after the vortex-induced vibration component 304 is driven to vibrate again through the bag filter body 1 and the air outlet duct group 2 during the dust removal process and enters the controllable interception component 4.

[0083] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bag filter dust collector for mineral sample preparation, characterized in that, include: The main body (1) of the bag dust collector is provided with an air outlet duct assembly (2) on the side of the main body (1). The air outlet duct assembly (2) includes: a pipe (201) and an adjustable flow centrifugal fan (202) installed on the pipe (201). Controllable flow interception component (4), the controllable flow interception component (4) has a first air inlet, a first air outlet (403) and a second air outlet (407), the first air inlet is connected to the first air outlet (403), the first air inlet and the second air outlet (407) are controllably connected / cut off, and the first air inlet is connected to the air outlet end of the air outlet pipe group (2); The return cleaning assembly (3) includes: a diversion pipe and a vortex vibration assembly (304). The vortex vibration assembly (304) is arranged inside the main body (1) of the bag filter. The first end of the diversion pipe is connected to the second air outlet (407), and the second end of the diversion pipe is connected to the vortex vibration assembly (304). The main body (1) of the bag filter includes: The main housing (101) has an opening at the top and a guide part (101a) at the bottom. A dust collection port (102) is fixedly provided at the bottom end of the guide part (101a). A gas inlet (104) is fixedly provided on the side of the main housing (101). The top cover (103) is fixedly installed on the top of the main housing (101), and a gas outlet (105) is fixedly provided on the top of the top cover (103). A cylindrical cloth bag (107) has a top mounting plate (106) sealed and fixedly installed on the inner side of the main housing (101) and near the top opening of the main housing (101). The top mounting plate (106) has mounting holes in the same number as the cylindrical cloth bag (107). The top of the cylindrical cloth bag (107) is fixedly provided with an annular part (107a), which is fixedly clamped inside the mounting hole. A bottom support plate (109) is installed on the inner side of the main housing (101) via an elastic frame (1010). The bottom support plate (109) is provided with dust collection holes. A metal head (108) corresponding to a cylindrical cloth bag (107) is fixedly installed on the top of the bottom support plate (109). A flat-top cone head (108a) is provided on the top of the metal head (108). The bottom end of the cylindrical cloth bag (107) is fixedly installed to the flat-top cone head (108a) by screws. The vortex-induced vibration assembly (304) is installed at the bottom of the base plate (109); The vortex-induced vibration assembly (304) includes: A square tube channel (304a) has a vertically arranged guide hole (304b) on its side. A sliding shaft (304) is slidably mounted on the inside of a guide hole (304b), and a cylinder (304d) is fixedly connected to the sliding shaft (304) and located inside the square tube channel (304a). A spring (304f) is provided. A side plate (304e) is fixedly installed on the outside of the square tube channel (304a). One end of the spring (304f) is fixedly connected to the side plate (304e), and the other end of the spring (304f) is fixedly connected to the sliding shaft (304).

2. The bag filter dust collector for mineral sample preparation according to claim 1, characterized in that, The elastic frame (1010) includes: a bottom frame (1010a), a top frame (1010b), and an elastic filler (1010c) located between the bottom frame (1010a) and the top frame (1010b), wherein one end of the bottom frame (1010a) is fixedly connected to one end of the top frame (1010b).

3. The bag filter dust collector for mineral sample preparation according to claim 1, characterized in that, The controllable flow interception component (4) includes: The outer tube body (401) is provided with a retractable connector (402) at the bottom. The bottom end of the retractable connector (402) is the first air inlet. The bottom end of the retractable connector (402) is connected to the air outlet end of the air outlet pipe group (2). The first air outlet interface (403) is provided on the side of the outer tube body (401). Top plate (404), the top plate (404) is fixedly installed on the inner side of the outer tube (401), the top plate (404) has a through hole, and a sealing ring (405) is fixedly installed on the inner side of the through hole. The inner tube (408) is located inside the outer tube (401), and the top end of the inner tube (408) is fixedly connected to the top plate (404), and the sealing ring (405) corresponds to the center of the inner tube (408). The side of the inner tube (408) is fixedly connected to the second air outlet (407), and the second air outlet (407) extends through the side wall of the outer tube (401) to the outside of the outer tube (401). A flow-cutting cone (4011) is provided with a non-fixed mating seat (4010) on the inner side of the inner tube body (408) near the bottom. The mating seat (4010) has a conical hole at its center. The flow-cutting cone (4011) is located inside the conical hole. The flow-cutting cone (4011) is a shell component. The conical side of the flow-cutting cone (4011) is provided with a side air hole (4011a). The bottom surface of the flow-cutting cone (4011) is provided with a bottom air hole (4011b). An electric drive telescopic component (406) is installed upside down and fixedly on the top of the outer tube (401), with the telescopic end of the electric drive telescopic component (406) located inside the outer tube (401). The transmission rod (409) is slidably installed inside the sealing ring (405), and the top end of the transmission rod (409) is fixedly installed with the telescopic end of the electric drive telescopic member (406), and the bottom end of the transmission rod (409) is fixedly installed with the top end of the throttling cone (4011).

4. The bag filter dust collector for mineral sample preparation according to claim 3, characterized in that: The connection between the first air outlet (403) and the outer tube (401) is located on the outside of the inner tube (408).

5. The bag filter dust collector for mineral sample preparation according to claim 1, characterized in that, The drainage tube includes a guide tube section (301), a manifold section (302), and a secondary branch section (303) connected in sequence. The secondary branch section (303) is fixedly connected to the main shell (101), and one end of the secondary branch section (303) is located inside the main shell (101). One end of the secondary branch section (303) is connected to the vortex-induced vibration assembly (304).

6. The bag filter dust collector for mineral sample preparation according to claim 5, characterized in that: Multiple sets of the secondary branch pipe section (303) and the vortex-induced vibration assembly (304) are provided.

7. The bag filter dust collector for mineral sample preparation according to claim 1, characterized in that: Multiple sets of the guide hole (304b), sliding shaft (304), cylinder (304d), spring (304f), and side plate (304e) are provided along the length direction of the square tube channel (304a).

8. A dust removal method, characterized in that, The use of the bag filter dust collector in mineral sample preparation according to any one of claims 1-7 specifically includes the following steps: Dust removal operation When the first air inlet and the second air outlet (407) are cut off, the centrifugal fan (202) with adjustable flow rate of the air outlet duct group (2) is working, driving the airflow carrying dust through the main body (1) of the bag filter, removing dust from the airflow carrying dust in the main body (1), and the clean airflow after dust removal passes through the area between the first air inlet and the first air outlet (403) of the air outlet duct group (2) and the controllable interception component (4), and is discharged from the first air outlet (403); Cloth bag cleaning During the dust removal operation, the first air inlet and the second air outlet (407) are connected, and the power of the adjustable flow centrifugal fan (202) is increased. During the dust removal operation, part of the clean airflow after dust removal passes through the area between the first air inlet and the second air outlet (407) of the controllable interception component (4), and then enters the return cleaning component (3) from the second air outlet (407). Then, the vortex vibration component (304) is driven to vibrate to clean the filter bags of the bag filter body (1). The airflow after the vortex vibration component (304) is driven to vibrate passes through the bag filter body (1) and the air outlet pipe group (2) again during the dust removal operation and enters the controllable interception component (4).

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