An ultrasonic enhanced mist film dust collector for coal mine

Abstract

The utility model provides a kind of mine mist film dust collector of ultrasonic strengthening microfine coal particle removal, including cylinder, water mist nozzle, impeller, waterproof motor, double liquid film dust removal unit, ultrasonic vibration dust removal unit, ultrasonic atomization dust removal unit and sewage recycling unit;Cylinder one end is equipped with air inlet, the other end is equipped with air outlet, and filter screen is equipped at air outlet;Water mist nozzle is located at the center of air inlet;Waterproof motor is located inside cylinder and is fixed with cylinder by hollow motor base;Impeller is located inside hollow motor base, and impeller is coaxially fixed with motor shaft of waterproof motor;Water mist nozzle is opposite with impeller;Double liquid film dust removal unit and ultrasonic vibration dust removal unit are located inside cylinder, double liquid film dust removal unit is adjacent with air inlet, and ultrasonic vibration dust removal unit is adjacent with air outlet;Ultrasonic atomization dust removal unit and sewage recycling unit are located outside cylinder.The dust collector of the utility model greatly improves microfine dust capture ability and respirable dust capture efficiency, realizes water resource recycling.

Description

Technical Field

[0001] This invention belongs to the field of dust control technology, and in particular relates to a mine mist film dust collector for ultrasonically enhanced removal of fine coal particles. Background Technology

[0002] Coal is one of my country's most important energy sources, and its rapid economic development will remain reliant on coal resources for a long time to come. Driven by huge market demand for coal, coal mining and processing have increased significantly, leading to increasingly severe dust pollution problems.

[0003] High concentrations of coal dust not only severely pollute the working environment but also cause a series of production safety problems. If workers inhale high concentrations of dust, it can lead to occupational diseases such as pneumoconiosis. Furthermore, coal dust can affect visibility at the working face, accelerate the wear and tear of machinery, and even cause explosions. Therefore, coal dust control is a very challenging task.

[0004] Chinese patent application number 201510558767.0 discloses a wet dust collector for mining. This dust collector uses the centrifugal force of the impeller hub to atomize water flow, directly striking and intercepting dust in the air. However, this dust collector only captures dust through conventional water mist, resulting in poor dust removal efficiency, especially for respirable dust.

[0005] Chinese patent application number 201610525523.7 discloses a wind-mist convection type high-efficiency wet dust collector for mining. This dust collector enhances the negative pressure capability of the dust-laden airflow by using phase difference results, and achieves high-efficiency dust settling through the convection effect of the rotating spray field and the dust-laden air field. However, this dust collector has poor ability to capture fine dust, and the excessive number of internal nozzles makes maintenance difficult. The external connection of clean water for spraying results in a large waste of water resources. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a mine mist film dust collector with ultrasonic enhancement for the removal of fine coal particles, which significantly improves the capture ability of fine dust, especially the capture efficiency for respirable dust. It also realizes the recycling and reuse of water resources during the dust removal process, reducing water waste.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a mine mist film dust collector for ultrasonically enhanced removal of fine coal particles, comprising a cylinder, water mist nozzles, an impeller, a waterproof motor, a dual-liquid film dust removal unit, an ultrasonic vibration dust removal unit, an ultrasonic atomization dust removal unit, and a wastewater recycling unit; the cylinder has an air inlet at one end and an air outlet at the other end, with a filter screen installed at the air outlet; the water mist nozzle is located at the center of the air inlet; the waterproof motor is located inside the cylinder and is fixedly connected to the cylinder via a perforated motor base; the impeller is located inside the perforated motor base and is coaxially fixedly connected to the motor shaft of the waterproof motor; the water mist nozzle is directly opposite the impeller; the dual-liquid film dust removal unit and the ultrasonic vibration dust removal unit are located inside the cylinder, with the dual-liquid film dust removal unit adjacent to the air inlet and the ultrasonic vibration dust removal unit adjacent to the air outlet; the ultrasonic atomization dust removal unit and the wastewater recycling unit are located outside the cylinder.

[0008] The dual-liquid-film dust removal unit includes a honeycomb perforated plate, baffles, and an ultrasonic generator. The honeycomb perforated plate and baffles have an arc-shaped structure, with their concave surfaces distributed on the same side as the air inlet. Two honeycomb perforated plates are installed symmetrically on the inner wall of the cylinder, with a dust-laden airflow channel between them. Two baffles are also installed symmetrically on the inner wall of the cylinder, with a dust-laden airflow channel also between them. The honeycomb perforated plates are located on the same side... A gap is left between the honeycomb perforated plate and the baffle, with the honeycomb perforated plate located on the air inlet side and the baffle on the air outlet side. The honeycomb perforated plate on the same side cooperates with the baffle to form a double liquid film dust removal structure. There are two ultrasonic generators, which are installed symmetrically on the inner wall of the cylinder. The ultrasonic generators are adjacent to the baffle, and the ultrasonic transmitters of the ultrasonic generators are directly opposite the baffles. The ultrasonic waves output by the ultrasonic generators trigger the baffles to vibrate, and the vibration of the baffles accelerates the discharge of dust-containing liquid in the gap between the honeycomb perforated plate and the baffles.

[0009] The ultrasonic vibration dust removal unit includes an ultrasonic vibrator and an ultrasonic vibration hollow sphere. The ultrasonic vibrator is located between the baffle and the air outlet. The ultrasonic vibrator is fixedly installed on the inner wall of the cylinder. The amplitude transformer of the ultrasonic vibrator is fixedly connected to the ultrasonic vibration hollow sphere. The ultrasonic vibration output by the ultrasonic vibration hollow sphere enhances the agglomeration of fine dust.

[0010] The ultrasonic atomization dust removal unit includes an atomization box, an ultrasonic atomizer, and a mist outlet pipe. The atomization box is located below the cylinder. The lower end of the mist outlet pipe is connected to the atomization box, and the upper end of the mist outlet pipe is connected to the cylinder. The upper end of the mist outlet pipe is located below the ultrasonic exciter and the ultrasonically vibrating hollow sphere. The micro-mist output by the mist outlet pipe works in conjunction with the enhanced agglomeration of fine dust to perform ultrasonic atomization dust removal.

[0011] The wastewater recycling unit includes a water storage tank, a wastewater purification filter baffle, a first water pump, and a second water pump. A wastewater discharge port is provided at the bottom of the cylinder and is connected to the top of the water storage tank. The wastewater purification filter baffle is located inside the water storage tank and below the wastewater discharge port, and is fixedly connected to the inner wall of the water storage tank. The first water pump and the second water pump are located at the bottom of the inside of the water storage tank. The outlet of the first water pump is connected to the inlet of the water mist nozzle through a first water supply pipe. The outlet of the second water pump is connected to the inside of the atomizing box through a second water supply pipe.

[0012] The wastewater purification filter baffle adopts a mesh plate sandwich structure, and AFM glass filter media and granular activated carbon are set inside the sandwich of the wastewater purification filter baffle.

[0013] A liquid storage tank is provided on the side of the water storage tank. The liquid storage tank contains a multi-electrode ion dust removal agent. A liquid pump is provided outside the liquid storage tank. The suction end of the liquid pump is connected to the inside of the liquid storage tank through a suction pipe, and the discharge end of the liquid pump is connected to the inside of the water storage tank through a discharge pipe.

[0014] The multi-element ionic dust collector is a compound ionic solution, which is prepared by mixing alkylphenol polyoxyethylene ether, fatty acid sulfonyl ester, 1-ethyl-3-methylimidazolium bromide and sodium chloride.

[0015] The beneficial effects of this invention are:

[0016] The ultrasonic-enhanced fine coal particle removal mist film dust collector of the present invention significantly improves the capture ability of fine dust, especially the capture efficiency of respirable dust, and realizes water resource recycling and reuse during the dust removal process, reducing water waste. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a mine mist film dust collector for ultrasonically enhanced removal of fine coal particles according to the present invention.

[0018] In the diagram, 1—cylinder, 2—water mist nozzle, 3—impeller, 4—waterproof motor, 5—air inlet, 6—air outlet, 7—hollow motor base, 8—honeycomb perforated plate, 9—baffle, 10—ultrasonic generator, 11—dust-laden airflow channel, 12—ultrasonic vibrator, 13—ultrasonic vibrating hollow sphere, 14—atomizing box, 15—ultrasonic atomizer, 16—mist outlet pipe, 17—water storage tank, 18—sewage purification filter baffle, 19—first water pump, 20—second water pump, 21—sewage discharge outlet, 22—first water supply pipe, 23—second water supply pipe, 24—liquid storage tank, 25—multi-element ion dust removal agent, 26—liquid pump, 27—liquid suction pipe, 28—liquid discharge pipe, 29—filter screen. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, a mine mist film dust collector for ultrasonically enhanced removal of fine coal particles includes a cylinder 1, a water mist nozzle 2, an impeller 3, a waterproof motor 4, a dual-liquid film dust removal unit, an ultrasonic vibration dust removal unit, an ultrasonic atomization dust removal unit, and a wastewater recycling unit. The cylinder 1 has an air inlet 5 at one end and an air outlet 6 at the other end, with a filter screen 29 installed at the air outlet 6. The water mist nozzle 2 is located at the center of the air inlet 5. The waterproof motor 4 is located inside the cylinder 1 and is fixedly connected to the cylinder 1 via a perforated motor base 7. The impeller 3 is located inside the perforated motor base 7 and is coaxially fixed to the motor shaft of the waterproof motor 4. The water mist nozzle 2 is directly opposite the impeller 3. The dual-liquid film dust removal unit and the ultrasonic vibration dust removal unit are located inside the cylinder 1, with the dual-liquid film dust removal unit adjacent to the air inlet 5 and the ultrasonic vibration dust removal unit adjacent to the air outlet 6. The ultrasonic atomization dust removal unit and the wastewater recycling unit are located outside the cylinder 1.

[0021] The dual-liquid-film dust removal unit includes a honeycomb perforated plate 8, a baffle 9, and an ultrasonic generator 10. The honeycomb perforated plate 8 and the baffle 9 adopt an arc-shaped structure, with their concave surfaces distributed on the same side as the air inlet 5. There are two honeycomb perforated plates 8, which are mirror-symmetrically installed on the inner wall of the cylinder 1, with a dust-laden airflow channel 11 between them. There are also two baffles 9, which are mirror-symmetrically installed on the inner wall of the cylinder 1, with a dust-laden airflow channel 11 also between them. The honeycomb perforated plates 8 and the baffle 9 are located on the same side. A gap is left between the baffles 9, and the honeycomb perforated plate 8 is located on one side of the air inlet 5, while the baffle 9 is located on the other side of the air outlet 6. The honeycomb perforated plate 8 and the baffle 9 on the same side cooperate to form a double liquid film dust removal structure. There are two ultrasonic generators 10, which are installed symmetrically on the inner wall of the cylinder 1. The ultrasonic generators 10 are adjacent to the baffles 9, and the ultrasonic transmitting end of the ultrasonic generator 10 is directly opposite the baffle 9. The ultrasonic waves output by the ultrasonic generator 10 trigger the baffle 9 to vibrate, and the vibration of the baffle 9 accelerates the discharge of dust-containing liquid in the gap between the honeycomb perforated plate 8 and the baffle 9.

[0022] The ultrasonic vibration dust removal unit includes an ultrasonic vibrator 12 and an ultrasonic vibration hollow sphere 13. The ultrasonic vibrator 12 is located between the baffle 9 and the air outlet 6. The ultrasonic vibrator 12 is fixedly installed on the inner wall of the cylinder 1. The amplitude transformer of the ultrasonic vibrator 12 is fixedly connected to the ultrasonic vibration hollow sphere 13. The ultrasonic vibration hollow sphere 13 outputs ultrasonic vibration to enhance the agglomeration of fine dust.

[0023] The ultrasonic atomization dust removal unit includes an atomization box 14, an ultrasonic atomizer 15, and a mist outlet pipe 16. The atomization box 14 is located below the cylinder 1. The lower end of the mist outlet pipe 16 is connected to the atomization box 14, and the upper end of the mist outlet pipe 16 is connected to the cylinder 1. The upper end of the mist outlet pipe 16 is located below the ultrasonic exciter 12 and the ultrasonic vibrating hollow sphere 13. The micro-mist output by the mist outlet pipe 16 works in conjunction with the enhanced agglomeration of fine dust to perform ultrasonic atomization dust removal.

[0024] The wastewater recycling unit includes a water storage tank 17, a wastewater purification and filtration baffle 18, a first water pump 19, and a second water pump 20. A wastewater discharge port 21 is provided at the bottom of the cylinder 1, and the wastewater discharge port 21 is connected to the top of the water storage tank 17. The wastewater purification and filtration baffle 18 is located inside the water storage tank 17 and below the wastewater discharge port 21, and the wastewater purification and filtration baffle 18 is fixedly connected to the inner wall of the water storage tank 17. The first water pump 19 and the second water pump 20 are located at the bottom of the inside of the water storage tank 17. The outlet of the first water pump 19 is connected to the inlet of the water mist nozzle 2 through a first water supply pipe 22. The outlet of the second water pump 20 is connected to the inside of the atomizing box 14 through a second water supply pipe 23.

[0025] The wastewater purification filter baffle 18 adopts a mesh plate sandwich structure, and AFM glass filter media and granular activated carbon are arranged inside the sandwich of the wastewater purification filter baffle 18.

[0026] A liquid storage tank 24 is provided on the side of the water storage tank 17. The liquid storage tank 24 contains a multi-element ion dust removal agent 25. A liquid pump 26 is provided outside the liquid storage tank 24. The suction end of the liquid pump 25 is connected to the inside of the liquid storage tank 24 through a suction pipe 27, and the discharge end of the liquid pump 25 is connected to the inside of the water storage tank 17 through a discharge pipe 28.

[0027] The multi-element ionic dust collector 25 is a compound ionic solution, which is prepared by mixing alkylphenol polyoxyethylene ether, fatty acid sulfonyl ester, 1-ethyl-3-methylimidazolium bromide and sodium chloride.

[0028] The following describes a single use of the present invention with reference to the accompanying drawings:

[0029] First, pure water is injected into the water storage tank 17. After the water storage tank 17 is filled with water, the liquid pump 26 is started to pump the multi-element ion dust removal agent 25 from the liquid storage tank 24 into the water storage tank 17, so that the multi-element ion dust removal agent 25 and pure water are mixed in the water storage tank 17 according to the set ratio until dust removal water is formed. After the dust removal water is prepared, the second water pump 20 is started to pump the dust removal water in the water storage tank 17 into the atomizing box 14, so that the dust removal water fully submerges the ultrasonic atomizer 15.

[0030] After the above preparations are completed, the first water pump 19, waterproof motor 4, ultrasonic vibrator 12 and ultrasonic atomizer 15 are started simultaneously.

[0031] When the first water pump 19 starts, it will pump the dust removal water in the water storage tank 17 into the water mist nozzle 2, and spray the dust removal water into the impeller 3 in the form of mist droplets through the water mist nozzle 2.

[0032] When the waterproof motor 4 is started, it will drive the impeller 3 to rotate at high speed, thereby creating a negative pressure in the air inlet 5 and drawing the dust-laden airflow outside the cylinder 1 into the air inlet 5. Then, the airflow passes through the hollow motor base 7 in the radial direction through the rotating impeller 3 and enters the cylinder 1.

[0033] When the water used for dust removal passes through the high-speed rotating impeller 3 in the form of droplets, it is broken into even smaller fine droplets by the impeller 3. These fine droplets will then collide with and combine with the dust in the dust-laden airflow through inertial means, thereby achieving the first stage of dust capture.

[0034] After the dust-laden airflow passes through the first stage of dust removal, it will carry some liquid droplets and continue to flow until it hits the honeycomb perforated plate 8. The liquid droplets in the dust-laden airflow will form a double-layer liquid film between the honeycomb perforated plate 8 and the baffle 9. When the dust in the dust-laden airflow hits the double-layer liquid film, it will be adhered by the liquid film, thus achieving the second stage of dust capture.

[0035] After the dust-laden airflow passes through the second stage of dust removal, it flows through the dust-laden airflow channel 11 to the ultrasonic vibrator 12 and the ultrasonic vibrating hollow sphere 13. The high-frequency vibration generated by the ultrasonic vibrating hollow sphere 13 enhances the agglomeration of residual dust in the dust-laden airflow. During this process, the dust removal water in the atomization box 14 will continuously form micro-mist under the action of the ultrasonic atomizer 15. The generated micro-mist will flow through the mist outlet pipe 16 to the ultrasonic vibrating hollow sphere 13, and cooperate with the enhanced agglomeration to perform ultrasonic atomization dust removal, thereby achieving the third stage of dust capture.

[0036] After the dust in the dust-laden airflow is captured in three stages, and then passes through a final dust removal filter 29, the purified dust-free air can be discharged from the air outlet 6.

[0037] During the three-stage combined dust removal process, the generated dust-laden droplets will fall to the bottom of the cylinder 1 under the action of gravity. In the second stage of dust removal, in order to accelerate the discharge speed, the ultrasonic generator 10 needs to be activated. The ultrasonic generator 10 triggers the baffle 9 to vibrate, and the vibration of the baffle 9 accelerates the discharge of the dust-laden liquid in the gap between the honeycomb perforated plate 8 and the baffle 9.

[0038] When the dust-laden liquid drips to the bottom of the cylinder 1, the collected dust-laden liquid flows into the water storage tank 17 through the sewage discharge port 21. Then it falls directly onto the sewage purification filter baffle 18 below the sewage discharge port 21. The dust particles in the dust-laden liquid are blocked by the sewage purification filter baffle 18, and the water after passing through the sewage purification filter baffle 18 becomes clean water. This clean water will be used to supplement the original pure water in the water storage tank 17, thereby realizing the reuse of water resources and further reducing the waste of water resources.

[0039] The solutions described in the embodiments are not intended to limit the scope of patent protection of this invention. All equivalent implementations or modifications that do not depart from the scope of this invention are included in the patent scope of this case.

Claims

1. A mine mist film dust collector for ultrasonically enhanced removal of fine coal particles, characterized in that: The system includes a cylindrical body, water mist nozzles, an impeller, a waterproof motor, a dual-liquid film dust removal unit, an ultrasonic vibration dust removal unit, an ultrasonic atomization dust removal unit, and a wastewater recycling unit. The cylindrical body has an air inlet at one end and an air outlet at the other end, with a filter screen installed at the air outlet. The water mist nozzles are positioned at the center of the air inlet. The waterproof motor is located inside the cylindrical body and is fixedly connected to the cylindrical body via a perforated motor mount. The impeller is located inside the perforated motor mount and is coaxially fixed to the motor shaft of the waterproof motor. The water mist nozzles face the impeller. The dual-liquid film dust removal unit and the ultrasonic vibration dust removal unit are located inside the cylindrical body, with the dual-liquid film dust removal unit adjacent to the air inlet and the ultrasonic vibration dust removal unit adjacent to the air outlet. The ultrasonic atomization dust removal unit and the wastewater recycling unit are located outside the cylindrical body. The dual-liquid-film dust removal unit includes a honeycomb perforated plate, baffles, and an ultrasonic generator. The honeycomb perforated plate and baffles have an arc-shaped structure, with their concave surfaces distributed on the same side as the air inlet. Two honeycomb perforated plates are installed symmetrically on the inner wall of the cylinder, with a dust-laden airflow channel between them. Two baffles are also installed symmetrically on the inner wall of the cylinder, with a dust-laden airflow channel also between them. The honeycomb perforated plates are located on the same side... A gap is left between the honeycomb perforated plate and the baffle, with the honeycomb perforated plate located on the air inlet side and the baffle on the air outlet side. The honeycomb perforated plate on the same side cooperates with the baffle to form a double liquid film dust removal structure. There are two ultrasonic generators, which are installed symmetrically on the inner wall of the cylinder. The ultrasonic generators are adjacent to the baffle, and the ultrasonic transmitters of the ultrasonic generators are directly opposite the baffles. The ultrasonic waves output by the ultrasonic generators trigger the baffles to vibrate, and the vibration of the baffles accelerates the discharge of dust-containing liquid in the gap between the honeycomb perforated plate and the baffles. The ultrasonic vibration dust removal unit includes an ultrasonic vibrator and an ultrasonic vibration hollow sphere. The ultrasonic vibrator is located between the baffle and the air outlet. The ultrasonic vibrator is fixedly installed on the inner wall of the cylinder. The amplitude transformer of the ultrasonic vibrator is fixedly connected to the ultrasonic vibration hollow sphere. The ultrasonic vibration output by the ultrasonic vibration hollow sphere enhances the agglomeration of fine dust.

2. The mine mist film dust collector for ultrasonically enhanced removal of fine coal particles according to claim 1, characterized in that: The ultrasonic atomization dust removal unit includes an atomization box, an ultrasonic atomizer, and a mist outlet pipe. The atomization box is located below the cylinder. The lower end of the mist outlet pipe is connected to the atomization box, and the upper end of the mist outlet pipe is connected to the cylinder. The upper end of the mist outlet pipe is located below the ultrasonic exciter and the ultrasonically vibrating hollow sphere. The micro-mist output by the mist outlet pipe works in conjunction with the enhanced agglomeration of fine dust to perform ultrasonic atomization dust removal.

3. The mine mist film dust collector for ultrasonically enhanced removal of fine coal particles according to claim 2, characterized in that: The wastewater recycling unit includes a water storage tank, a wastewater purification filter baffle, a first water pump, and a second water pump. A wastewater discharge port is provided at the bottom of the cylinder and is connected to the top of the water storage tank. The wastewater purification filter baffle is located inside the water storage tank and below the wastewater discharge port, and is fixedly connected to the inner wall of the water storage tank. The first water pump and the second water pump are located at the bottom of the inside of the water storage tank. The outlet of the first water pump is connected to the inlet of the water mist nozzle through a first water supply pipe. The outlet of the second water pump is connected to the inside of the atomizing box through a second water supply pipe.

4. A mine mist film dust collector for ultrasonically enhanced removal of fine coal particles according to claim 3, characterized in that: The wastewater purification filter baffle adopts a mesh plate sandwich structure, and AFM glass filter media and granular activated carbon are set inside the sandwich of the wastewater purification filter baffle.

5. A mine mist film dust collector for ultrasonically enhanced removal of fine coal particles according to claim 3, characterized in that: A liquid storage tank is provided on the side of the water storage tank. The liquid storage tank contains a multi-electrode ion dust removal agent. A liquid pump is provided outside the liquid storage tank. The suction end of the liquid pump is connected to the inside of the liquid storage tank through a suction pipe, and the discharge end of the liquid pump is connected to the inside of the water storage tank through a discharge pipe.

6. A mine mist film dust collector for ultrasonically enhanced removal of fine coal particles according to claim 5, characterized in that: The multi-element ionic dust collector is a compound ionic solution, which is prepared by mixing alkylphenol polyoxyethylene ether, fatty acid sulfonyl ester, 1-ethyl-3-methylimidazolium bromide and sodium chloride.

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