Dust removal device of belt conveyor

Abstract

The utility model discloses a dust removal device of a belt conveyor, and relates to the technical field of dust removal devices. The bag-type dust collector comprises a rack, a bag-type dust collector body is arranged in the rack, a low-pressure nitrogen bag is arranged on the surface of the outer side of the bag-type dust collector body, the lower end of the bag-type dust collector body is connected with an oscillation motor, a frequency conversion fan is arranged on the bag-type dust collector body, a dust collection pipeline is connected to the bag-type dust collector body, and the bag-type dust collector body is connected with the oscillation motor. The pressure sensor and the temperature sensor can monitor the temperature and the pressure in the dust collector in real time, once the temperature is too high or the pressure exceeds a normal range, the dust collection pipeline is connected with a coal guide groove dust collection opening and a machine head shield dust collection opening respectively, and an exhaust pipe is arranged on the bag-type dust collector body. When a fault occurs, the system triggers a chain protection action, so that the safety operation of equipment can be effectively ensured, the misoperation of personnel is avoided, and the fault can be effectively isolated automatically and accurately.

Description

Technical Field

[0001] This application relates to the field of dust removal equipment technology, and in particular to a dust removal device for a belt conveyor. Background Technology

[0002] With the rapid increase in the number of factories and the large-scale use of coal as industrial fuel, numerous production processes generate substantial amounts of smoke and dust. For example, in the steel smelting industry, the combustion of coal in blast furnaces releases dense smoke mixed with ore dust; in thermal power generation, the combustion of pulverized coal produces massive amounts of fly ash. This dust not only pollutes the workshop environment but also harms workers' health, causing occupational diseases such as pneumoconiosis, making the development of effective dust removal equipment a necessity.

[0003] Traditional methods for dealing with dust problems from belt conveyors have many shortcomings. While common methods like water spraying can cause some dust particles to settle due to water adsorption, their effectiveness is extremely limited. When the material has high moisture content, it can easily cause belt slippage, affecting conveying efficiency, and may also cause material to stick to the belt, making subsequent cleaning difficult and costly in terms of manpower and resources. Furthermore, for some hydrophobic materials, such as lime powder, water spraying is almost ineffective.

[0004] Baghouse dust collectors can effectively solve dust problems, but improper dust removal can lead to energy waste. For example, if the dust collector operates at a set power and for a set time regardless of the equipment's output, it will generate operating resistance, affecting dust removal efficiency and causing the motor to overload and potentially damage it. In addition, failure to properly adjust the dust removal intensity and dust removal points may also cause secondary pollution. Utility Model Content

[0005] To address the aforementioned problems, this application provides a dust removal device for belt conveyors, which overcomes the shortcomings of traditional methods for dealing with dust problems in belt conveyors. Common methods like water spraying for dust suppression, while allowing some dust particles to settle due to water adsorption, have extremely limited effectiveness. When the material has high moisture content, it not only easily causes belt slippage, affecting conveying efficiency, but may also cause material to adhere to the belt, making subsequent cleaning difficult and costly in terms of manpower and resources. Furthermore, for some hydrophobic materials, such as lime powder, water spraying is almost ineffective. Baghouse dust collectors can effectively solve dust problems, but improper dust removal can lead to energy waste. For example, if the dust collector operates at a set power and for a set time regardless of equipment output, when the dust volume exceeds the set backflushing time, the dust collector experiences operating resistance, affecting dust removal efficiency and causing the motor to overload, potentially leading to motor damage. In addition, failure to properly adjust the dust removal intensity and dust removal points can also cause secondary pollution. The purpose of this utility model is to provide a dust removal device for belt conveyors.

[0006] To achieve the objectives of this application, the following technical solution is provided:

[0007] This application provides a dust removal device for a belt conveyor, comprising: a frame, a bag filter body disposed within the frame, a low-pressure nitrogen tank disposed on the outer surface of the bag filter body, a vibrating motor connected to the lower end of the bag filter body, a variable frequency fan disposed on the bag filter body, a dust collection pipe connected to the bag filter body, a dust collection port of a coal guide trough and a dust collection port of a machine head cover respectively connected to the dust collection pipe, and an exhaust pipe disposed on the bag filter body.

[0008] In one possible implementation, dust concentration sensors are installed inside the dust collection port of the machine head cover and the dust collection port of the coal guide trough.

[0009] In one possible implementation, electric butterfly valves are installed at the dust collection port of the coal guide trough and the dust collection port of the machine head cover.

[0010] In one possible implementation, a flame sensor is installed inside the bag filter body.

[0011] In one possible implementation, both the dust collection pipe and the exhaust pipe are equipped with pressure sensors and temperature sensors.

[0012] In one possible implementation, the dust collection pipe is equipped with a dust collector body, and the dust collection port of the coal guide trough and the dust collection port of the machine head cover are respectively connected through the dust collector body of the dust collection pipe.

[0013] Beneficial effects:

[0014] The pressure sensor and temperature sensor of this application can monitor the temperature and pressure inside the dust collector in real time. Once the temperature is too high or the pressure exceeds the normal range, the system will trigger a chain protection action to effectively ensure the safe operation of the equipment, avoid human error, and automatically and accurately isolate the fault. Attached Figure Description

[0015] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0016] Figure 1 The interlocking logic diagram provided for the embodiments of this application.

[0017] Figure 2 Specific implementation diagrams provided for embodiments of this application.

[0018] Figure 3 This is a schematic diagram of the dust concentration sensor structure provided in an embodiment of this application.

[0019] In the diagram: 0. Frame; 1. Dust collection port of coal guide trough; 2. Dust collection port of machine head cover; 3. Dust collection pipe; 4. Bag filter body; 5. Dust concentration sensor; 6. Pressure sensor; 7. Electric butterfly valve; 8. Variable frequency fan; 9. Temperature sensor; 10. Flame sensor; 11. Low-pressure nitrogen tank; 12. Vibrating motor; 41. Exhaust pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this application, unless otherwise stated, "multiple" means two or more.

[0022] Figure 1-3 A dust removal device for a belt conveyor provided in this application includes: a frame 0, a bag filter body 4 disposed inside the frame 0, a low-pressure nitrogen tank 11 disposed on the outer surface of the bag filter body 4, a vibrating motor 12 connected to the lower end of the bag filter body 4, a variable frequency fan 8 disposed on the bag filter body 4, a dust collection pipe 3 connected to the bag filter body 4, a dust collection port 1 of a coal guide trough and a dust collection port 2 of a machine head cover respectively connected to the dust collection pipe 3, and an exhaust pipe 41 disposed on the bag filter body 4.

[0023] In one possible implementation, dust concentration sensors 5 are installed inside the dust collection port 2 of the machine head cover and the dust collection port 1 of the coal guide trough. When the dust concentration sensor 5 detects that the dust concentration inside the dust collection port 1 of the coal guide trough or the dust collection port 2 of the machine head cover exceeds the set value, the bag filter body 4 and the related dust collection system are automatically started through the interlock switch to start the dust reduction and dust collection work. The dust concentration sensor 5 performs real-time dynamic monitoring of the dust concentration at each dust collection port. Based on the monitored dust concentration, the system automatically adjusts the opening of the electric butterfly valve 7 and the power of the variable frequency fan 8 via interlocking, thereby achieving precise adjustment of the dust collection power. If the dust concentration at a certain dust collection port is high, the system will increase the opening of the electric butterfly valve 7 at that port and simultaneously increase the power of the variable frequency fan 8 to achieve high-flow, high-power dust treatment. Conversely, under low-load conditions with low dust concentration, the system will automatically reduce the opening of the electric butterfly valve 7 and the power of the variable frequency fan 8, adaptively reducing the equipment load and achieving energy saving and consumption reduction. The dust collection port 1 in the coal guide trough and the dust collection port 2 in the machine head cover are installed with... An electric butterfly valve 7 is included. A flame sensor 10 is installed inside the bag filter body 4. Pressure sensors 6 and temperature sensors 9 are installed on both the dust collection pipe 3 and the exhaust pipe 41. The dust collector body is mounted on the dust collection pipe 3. The dust collection port 1 of the coal guide trough and the dust collection port 2 of the machine head cover are connected to the dust collector body through the dust collection pipe 3. As filtration continues, dust gradually accumulates and thickens on the outer surface of the filter bags, increasing the resistance to gas flow, reducing the air volume handled by the dust collector, and increasing energy consumption. The pressure sensor 6 monitors the pressure difference between the dust collection inlet and outlet in real time to determine the degree of dust accumulation on the filter bags. When the pressure difference reaches the set dust removal threshold, the dust removal program automatically starts. Through interlocking control, the low-pressure nitrogen tank 11 and the vibrating motor 12 start working to automatically pulse-purge the filter bags. When the pressure difference is lower than the set value, it indicates that the dust removal effect has met the requirements. The low-pressure nitrogen tank 11 and the vibration motor 12 stop running, while the temperature sensor 9 and the flame sensor 10 continue to work to monitor the temperature of the dust collector pipeline and its interior in real time, as well as whether there is any open flame. If an obvious temperature abnormality or open flame is found in the dust collector pipeline or its interior, the system will immediately close the dust collection port butterfly valve through interlock control to prevent more air from entering and dust from spreading.Simultaneously, open the low-pressure nitrogen tank 11 for nitrogen purging, using nitrogen to suffocate and extinguish the fire, effectively preventing dust explosions and fires. Regularly calibrate and inspect each sensor (dust concentration sensor 5, pressure sensor 6, temperature sensor 9, flame sensor 10) to ensure the accuracy and reliability of their measurement data. Check whether the connections of each device are loose or leaking, especially the connection points of the dust collection pipe 3 and the sealing condition of the electric butterfly valve 7. Regularly clean the dust accumulated inside the bag filter body 4, check the wear of the filter bags, and replace them in time if there is any damage. Regularly inspect and maintain the low-pressure nitrogen tank 11 to ensure that its nitrogen storage and pressure meet the requirements. Check the operation of the vibrating motor 12 to ensure that it can drive the filter bags to vibrate and clean the dust normally.

[0024] Working Principle: The system is interlocked with the dust concentration sensor 5 and the bag filter body 4. When the dust concentration sensor 5 detects dust concentration exceeding the set value at the dust collection port 1 of the coal guide trough or the dust collection port 2 of the machine head cover, the dust collector can be started via the interlock switch. The dust concentration sensor 5 dynamically monitors the dust concentration at each dust collection port in real time, and adjusts the opening of the electric butterfly valve 7 and the variable frequency drive of the variable frequency fan 8 to adjust the actual dust collection power. It can selectively handle high-flow-rate, high-power dust at high dust concentrations, and can also adaptively reduce the load at low loads to achieve energy saving and consumption reduction. As filtration continues, dust gradually accumulates and thickens on the outer surface of the filter bags. Excessive dust accumulation increases the resistance to gas passage, leading to reduced dust collection efficiency. As airflow decreases and energy consumption increases, the dust removal program automatically starts when the pressure difference across the filter bag reaches the set dust removal threshold. The pressure sensor 6 monitors the pressure difference between the dust collection inlet and the exhaust outlet to determine the degree of dust accumulation on the filter bag. The low-pressure nitrogen tank 11 and the vibrating motor 12 are interlocked to automatically pulse-purge the filter bag. When the pressure difference is lower than the set value, the low-pressure nitrogen tank 11 and the vibrating motor 12 stop operating. The temperature sensor 9 and the flame sensor 10 effectively prevent dust explosions and fires. If obvious temperature abnormalities or open flames are found in the dust collector pipeline or inside, the dust collection port butterfly valve is closed via interlocking, and the low-pressure nitrogen tank 11 is opened for nitrogen purging. The fire is extinguished by nitrogen asphyxiation to prevent accidents.

[0025] In the embodiments provided in this application, it should be understood that the disclosed systems, modules, and methods can be implemented in other ways. For example, the module embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between modules or units, and may be electrical, mechanical, or other forms.

[0026] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A dust removal device for a belt conveyor, characterized by Include: Frame (0), the frame (0) is equipped with cloth bag dust collector body (4), the outer surface of cloth bag dust collector body (4) is equipped with low pressure nitrogen bag (11), the lower end of cloth bag dust collector body (4) is connected with oscillation motor (12), the frequency conversion fan (8) is equipped on cloth bag dust collector body (4), the dust collection pipeline (3) is connected on cloth bag dust collector body (4), the dust collection pipeline (3) is connected with coal channel dust collection mouth (1) and machine head shield dust collection mouth (2) respectively, the exhaust pipe (41) is equipped on cloth bag dust collector body (4).

2. A belt conveyor dust extraction apparatus according to claim 1, characterised in that, The dust concentration sensor (5) is installed in the machine head shield dust collection mouth (2) and the coal channel dust collection mouth (1).

3. A belt conveyor dust extraction apparatus according to claim 1, wherein, The electric butterfly valve (7) is installed at the coal channel dust collection mouth (1) and the machine head shield dust collection mouth (2).

4. A belt conveyor dust extraction apparatus according to claim 1, wherein The flame sensor (10) is installed in the cloth bag dust collector body (4).

5. A belt conveyor dust extraction apparatus according to claim 1, wherein The pressure sensor (6) and the temperature sensor (9) are arranged on the dust collection pipeline (3) and the exhaust pipe (41).

6. A belt conveyor dust extraction apparatus according to claim 1, wherein, The dust collector body is arranged on the dust collection pipeline (3), and the coal channel dust collection mouth (1) and the machine head shield dust collection mouth (2) are connected by the dust collection pipeline dust collector body.

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