Self-cleaning device of wet-type filter dust remover

Abstract

The utility model relates to the technical field of cleaning of dust removers, in particular to a self-cleaning device of a wet-type filter dust remover, a negative pressure sensor and a control component for controlling opening and closing of a draw-out fan are arranged on the outer side of the wet-type filter dust remover, and the negative pressure sensor is used for detecting internal pressure inside the wet-type filter dust remover. The self-cleaning device has the beneficial effects that after the self-cleaning device is additionally arranged in the wet-type filter dust remover, the negative pressure value in the dust remover is monitored in real time through the negative pressure sensor, and after the negative pressure value exceeds the limit value, the filter screen and the corrugated plate are cleaned through the back-flushing spraying frame; the treatment air volume of the dust remover is kept relatively stable, the dust falling efficiency of the working face is kept above 85%, and the working environment of the driving face of a rock roadway and a half-coal-rock roadway can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collector cleaning, in particular to a self-cleaning device for a wet-type filtering dust collector. Background Art

[0002] Currently, during tunneling construction in semi-coal and rock tunnels in coal mines, high dust generation from cutting is often addressed through the use of long-pressure, short-extraction ventilation and dust removal systems. These systems primarily rely on wet filter dust collectors for dust removal.

[0003] Wet filter dust collectors mainly use filters made of multi-layer stainless steel wire mesh and other materials to remove dust. The spray rack in front of the filter forms a mist droplet group that covers the entire fan cross-section, capturing high-concentration dust entering the dust collector. The mist droplet group forms a temporary liquid film through the filter, further intercepting the dust contained in the airflow. Part of the dust is intercepted by the filter and condensed into sewage and discharged from the dust collector, while the other part of the dust is carried by the wind into the corrugated plate and condensed into water droplets and discharged with the sewage.

[0004] However, due to the extremely high concentration and easy adhesion of rock dust, the filter screen and corrugated plate are prone to clogging, resulting in reduced air volume in the dust collector and affecting the dust removal efficiency of the work surface. During the production process, workers are required to open the dust collector for flushing, which is not only time-consuming and labor-intensive, but also affects workers' work. Utility Model Content

[0005] The purpose of the utility model is to provide a self-cleaning device for a wet filter dust collector to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A self-cleaning device for a wet filter dust collector includes a wet filter dust collector, an airflow filter assembly is provided at the air inlet end of the wet filter dust collector, an exhaust fan is provided at the exhaust end of the wet filter dust collector, a negative pressure sensor and a control assembly for controlling the opening and closing of the exhaust fan are provided on the outside of the wet filter dust collector, the negative pressure sensor is used to detect the internal pressure inside the wet filter dust collector, and a backwash assembly is provided in the wet filter dust collector that is directly opposite to the airflow filter assembly.

[0008] Preferably, the air flow filter assembly includes an air intake spray rack, a filter screen and a corrugated plate, and the air intake spray rack, the filter screen and the corrugated plate are sequentially installed at the air intake end of the wet filter dust collector.

[0009] Preferably, the backwash component includes a backwash spray rack, the backwash spray rack is connected to an external water channel, and the backwash spray rack is provided with a plurality of linearly distributed groups of high-pressure nozzles facing the corrugated plates.

[0010] Preferably, a solenoid valve for controlling opening and closing is provided on the water channel.

[0011] Preferably, a self-cleaning controller is provided on the outside of the wet filter dust collector, and the exhaust fan, solenoid valve and negative pressure sensor are electrically connected to the self-cleaning controller through a circuit, and a vacuum electromagnetic starter for controlling the exhaust fan is provided on the self-cleaning controller.

[0012] Preferably, a storage unit and an analysis unit are provided in the self-cleaning controller. The storage unit is used to store historical data detected by the negative pressure sensor, and the analysis unit is used to compare the difference between the real-time detection data transmitted by the negative pressure sensor and the historical data.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model adds a self-cleaning device to the wet filter dust collector, monitors the negative pressure value in the dust collector in real time through a negative pressure sensor, and uses a backwash spray rack to clean the filter screen and corrugated plate when the limit value is exceeded, so that the dust collector's processing air volume remains relatively stable and the dust reduction efficiency of the working face is maintained at more than 85%, which can significantly improve the working environment of the rock tunnel and semi-coal rock tunnel excavation face. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] In the figure: 1. Wet filter dust collector; 11. Air intake spray rack; 12. Backwash spray rack; 13. Filter; 14. Corrugated plate; 15. Exhaust fan; 2. Self-cleaning controller; 3. Negative pressure sensor; 4. Solenoid valve; 5. Vacuum electromagnetic starter; 6. Water channel; 7. Circuit. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1 , the utility model provides a technical solution:

[0019] A self-cleaning device for a wet filter dust collector includes a wet filter dust collector 1. The air inlet end of the wet filter dust collector 1 is provided with an air flow filter assembly, and the air flow filter assembly includes an air inlet spray rack 11, a filter screen 13 and a corrugated plate 14. The air inlet spray rack 11, the filter screen 13 and the corrugated plate 14 are installed in sequence at the air inlet end of the wet filter dust collector 1.

[0020] After high-concentration dust enters the fan from the air inlet of the wet filter dust collector 1, it will first mix with the droplet clusters generated by the spray rack 11. The droplet clusters collide and combine with most of the dust, and will further condense into large droplets after encountering the filter 13. After merging, they form flowing water and flow out of the dust collector drain port. At the same time, due to the high-speed airflow generated by the exhaust fan 15, the untreated dust and water vapor that has not condensed into droplets enter the corrugated plate 14 under the entrainment of the airflow, and the remaining water vapor is condensed into large droplets again, which converge to form a water flow and discharge from the dust collector 1.

[0021] Since rock tunnels or semi-coal rock tunnels generate a large amount of rock dust, and rock dust is easy to stick together into blocks, mud blocks formed by rock dust will accumulate on the mesh of the filter 13 and the bends of the corrugated plate 14 over a long period of time, and then slowly clog the filter 13 and the corrugated plate 14, causing the air flow section of the dust collector 1 to decrease, the ventilation resistance to increase, and the negative pressure in the dust collector 1 to increase. At this time, the air volume processed by the dust collector 1 is also continuously reduced, the dust reduction efficiency of the working face is continuously reduced, and the working environment is also continuously deteriorating.

[0022] The exhaust end of the wet filter dust collector 1 is provided with an exhaust fan 15, and the outside of the wet filter dust collector 1 is provided with a negative pressure sensor 3 and a control component for controlling the opening and closing of the exhaust fan 15. The negative pressure sensor 3 is used to detect the internal pressure inside the wet filter dust collector 1. The wet filter dust collector 1 is provided with a backwash component facing the airflow filter component. The backwash component includes a backwash spray rack 12, and the backwash spray rack 12 is connected to an external water channel 6. The backwash spray rack 12 is provided with multiple groups of linearly distributed high-pressure nozzles facing the corrugated plate 14.

[0023] The negative pressure sensor 3 is provided to monitor the negative pressure inside the wet filter dust collector 1, and the backwash spray rack 12 is used to clean the airflow filter assembly, thereby ensuring the cleanliness of the airflow filter assembly and avoiding blockage.

[0024] A solenoid valve 4 for controlling opening and closing is provided on the water channel 6, a self-cleaning controller 2 is provided on the outside of the wet filter dust collector 1, the exhaust fan 15, the solenoid valve 4 and the negative pressure sensor 3 are electrically connected to the self-cleaning controller 2 through the circuit 7, and the self-cleaning controller 2 is provided with a vacuum electromagnetic starter 5 for controlling the exhaust fan 15. A storage unit and an analysis unit are provided in the self-cleaning controller 2. The storage unit is used to store historical data detected by the negative pressure sensor 3, and the analysis unit is used to compare the difference between the real-time detection data transmitted by the negative pressure sensor 3 and the historical data.

[0025] The opening and closing of the water channel 6 is controlled by the electromagnetic valve 4, the opening and closing of the exhaust fan 15 is controlled by the vacuum electromagnetic starter 5, and the purpose of intelligent control is achieved by using the self-cleaning controller 2

[0026] Working principle: First, through the action of the negative pressure sensor 3, the real-time negative pressure data in front of the dust collector exhaust fan will be transmitted to the self-cleaning control box 2 through the communication line, and the control program in the self-cleaning control box 2 will compare it with the preset negative pressure limit. When the negative pressure value collected by the negative pressure sensor 3 exceeds the negative pressure limit, the exhaust fan 15 will be turned off, and the control program of the self-cleaning control box 2 will first send an instruction to the vacuum electromagnetic starter 5 to disconnect the power supply of the fan and stop the fan; then, the control program of the self-cleaning control box 2 sends an opening instruction to the solenoid valve 4, and high-pressure water will pass through the filter and the corrugated plate backwash spray rack 12 to backwash the filter 13 and the corrugated plate 14. After confirming that the flushing is clean, the control program in the self-cleaning control box 2 sends an instruction to the vacuum electromagnetic starter 5 to turn on the power supply of the fan and the fan will start again.

[0027] The negative pressure overrun limit is a key metric for activating the self-cleaning device. This value can be determined by using a dust sampler to measure dust concentration at the operator's workstation, such as the driver, and calculating the dust removal efficiency. If the dust concentration impairs the operator's vision or the dust removal efficiency falls below a certain value, the corresponding negative pressure value collected by the negative pressure sensor is used as the overrun limit.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wet filter dust collector self-cleaning device, comprising a wet filter dust collector (1), an air flow filter assembly being provided at an air inlet end of the wet filter dust collector (1), and an exhaust fan (15) being provided at an exhaust end of the wet filter dust collector (1), characterized in that: A negative pressure sensor (3) and a control component for controlling the opening and closing of the exhaust fan (15) are provided on the outside of the wet filter dust collector (1); the negative pressure sensor (3) is used to detect the internal pressure of the wet filter dust collector (1); and a backwash component facing the airflow filter component is provided in the wet filter dust collector (1).

2. A wet filter dust collector self-cleaning device according to claim 1, characterized in that: The air flow filter assembly comprises an air intake spray rack (11), a filter screen (13) and a corrugated plate (14), wherein the air intake spray rack (11), the filter screen (13) and the corrugated plate (14) are sequentially installed at the air intake end of the wet filter dust collector (1).

3. A wet filter dust collector self-cleaning device according to claim 2, characterized in that: The backwashing assembly comprises a backwashing spray rack (12), the backwashing spray rack (12) is externally connected to a water channel (6), and a plurality of linearly distributed groups of high-pressure spray heads facing the corrugated plates (14) are provided on the backwashing spray rack (12).

4. A wet filter dust collector self-cleaning device according to claim 3, characterized in that: The water channel (6) is provided with a solenoid valve (4) for controlling opening and closing.

5. A wet filter dust collector self-cleaning device according to claim 4, characterized in that: A self-cleaning controller (2) is provided on the outside of the wet filter dust collector (1); the exhaust fan (15), the electromagnetic valve (4) and the negative pressure sensor (3) are all electrically connected to the self-cleaning controller (2) via a circuit (7); and a vacuum electromagnetic starter (5) for controlling the exhaust fan (15) is provided on the self-cleaning controller (2).

6. A wet filter dust collector self-cleaning device according to claim 5, characterized in that: The self-cleaning controller (2) is provided with a storage unit and an analysis unit. The storage unit is used to store historical data detected by the negative pressure sensor (3), and the analysis unit is used to compare the difference between the real-time detection data transmitted by the negative pressure sensor (3) and the historical data.

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