Compact wet dust collector

Abstract

The present application relates to a kind of compact wet dust collector, including shell, shell one end is equipped with mixed flow dust catcher, the other end is equipped with dehydration device.Mixed flow dust catcher includes inlet hood, impeller, volute and explosion-proof motor.Impeller rotation is located in volute, and explosion-proof motor drives impeller rotation, dust-containing airflow enters by inlet hood, and after four times mixing by water mist sprayed by spiral nozzle, it enters dehydration device.Dehydration device includes spiral dehydration blade, conical dehydration cylinder and corrugated dehydration grid, and three-stage dehydration treatment is sequentially carried out.The design improves dust removal efficiency and dehydration effect, uses compact structure, is suitable for the integrated application of coal mining machine and other equipment, reduces the risk of blockage, reduces energy consumption and operating cost, wide application range, and safety is improved by explosion-proof motor.The present application has the advantages of high dust removal efficiency, good dehydration effect, compact structure, space saving, low energy consumption, low operating cost, high safety, etc., and is especially suitable for coal mine and other industrial scenes needing dust removal.

Description

Technical Field

[0001] This invention belongs to the field of coal mine dust removal technology and relates to a compact wet dust collector. Background Technology

[0002] During coal mining, the large amount of coal dust generated by coal cutting machines is the main dust source in fully mechanized mining faces. This coal dust not only seriously pollutes the working environment and endangers workers' health, but also affects the normal operation of equipment and can even cause safety accidents. Therefore, coal mine dust removal technology has become a crucial aspect of safe coal mine production. Currently, the most common dust removal devices on the market mainly fall into two categories: dry dust collectors and wet dust collectors.

[0003] Dry dust collectors capture airborne dust through filtration, centrifugal separation, or electrostatic discharge. The main types include bag filters, electrostatic precipitators, and cyclone dust collectors. Wet dust collectors capture airborne dust particles using water or other liquid media. The main types include venturi dust collectors, spray tower dust collectors, and wet electrostatic precipitators. Existing wet dust collection technologies have several major drawbacks in practical applications:

[0004] 1. Low dust removal efficiency: Existing dry dust collectors are not very effective at capturing fine dust particles. Although wet dust collectors have good dust removal efficiency, they consume a lot of energy and have high operating costs.

[0005] 2. Low dehydration efficiency: Existing wet dust collectors usually only use a single-stage or two-stage dehydration structure, which cannot fully remove moisture from the water-containing airflow, resulting in the exhaust airflow still containing a large amount of moisture, affecting the dust removal effect.

[0006] 3. Large size and large space occupation: Many dust removal equipment are bulky and occupy a lot of space, which is not conducive to installation and application in a limited space, especially for the integrated application of equipment such as coal mining machines.

[0007] 4. Severe clogging problem: The filter screen of wet dust collectors is prone to clogging due to dust accumulation, requiring frequent cleaning, which affects the continuous operation of the equipment and the dust removal effect.

[0008] 5. Not suitable for space-constrained scenarios: Existing dust removal equipment is generally large in size and is not suitable for space-constrained scenarios that require compact installation, such as coal mining machines, which limits its application scope.

[0009] With the widespread adoption of high-extraction fully mechanized mining faces, the mining area is large, resulting in high dust generation during coal cutting. Aside from spraying, there are no other effective dust suppression measures for coal cutting machines, making dust control a major challenge. Dust removal technologies and equipment that combine surplus mining space with dust collector technology for dust suppression and control have become a hot topic. However, the compatibility between the dust collector and the coal cutting machine directly affects the dust suppression effect, applicability, and reliability of the dust collector. Due to limitations in mining operation space and movement methods, existing dust collectors struggle to achieve optimal dust suppression with the coal cutting machine.

[0010] To address the aforementioned issues, there is an urgent need for a dust removal device that is compact in structure, highly efficient in dust removal, and effective in dehydration, in order to improve the effectiveness and efficiency of dust removal in coal mining and ensure the health of workers and the safe operation of equipment. Summary of the Invention

[0011] In view of this, the purpose of the present invention is to solve the above problems and provide a compact wet dust collector.

[0012] To achieve the above objectives, the present invention provides the following technical solution:

[0013] A compact wet scrubber includes a housing, with a mixed-flow dust collection device at one end and a dehydration device at the other end.

[0014] The mixed-flow dust collection device includes an air inlet hood at the end of the housing and an impeller, a volute, and an explosion-proof motor inside the housing. The impeller is rotatably mounted inside the volute. The explosion-proof motor is located outside the volute and connected to the impeller, driving the impeller to rotate. The volute is fixedly mounted inside the housing, with its air inlet communicating with the air inlet hood and its air outlet located inside the housing. A water distribution plate, coaxial with the impeller, is provided on the inner side of the impeller. The water distribution plate is bowl-shaped, with its bottom connected to the impeller and its opening facing the air inlet of the volute. A spray frame is provided inside the air inlet hood. The spray frame has several spiral nozzles, and the sprayed water flows towards the water distribution plate.

[0015] The air inlet hood has an air inlet on its side. An explosion-proof motor drives the impeller to rotate and draw in dust-laden airflow. The dust-laden airflow enters from the side of the air inlet hood and mixes with the water mist sprayed from the spiral nozzle for the first time as it flows toward the impeller. The water jet from the spiral nozzle is sprayed onto the water distribution plate, where it is centrifugally thrown out by the high-speed rotating plate, forming a disc-shaped water curtain that mixes with the dust-laden airflow for the second time. The disc-shaped water curtain formed by the water distribution plate impacts the blades of the impeller, forming water mist on the blade surface and between the blades, which mixes with the dust-laden airflow for the third time. The water jet on the impeller is thrown off by centrifugal force and collides and refracts with the volute to form water mist, which finally mixes with the dust-laden airflow for the fourth time before being discharged into the drum and forming a vortex to enter the dehydration device for dehydration.

[0016] Furthermore, the air inlet of the volute and the air inlet shroud are connected by a flow guide shroud. One end of the flow guide shroud passes through the air inlet of the volute and extends to the inside of the impeller opposite the water distribution plate. The cross-sectional area of ​​the air inlet end of the flow guide shroud is larger than the cross-sectional area of ​​the air outlet end, so as to guide the airflow to the inside of the impeller.

[0017] Furthermore, the water distribution plate is provided with multiple through holes; the through holes are distributed at intervals along the generatrix of the water distribution plate, and multiple through holes are also evenly distributed on the circumference of each through hole.

[0018] Furthermore, a water inlet plate is provided between the bottom of the water distribution plate and the impeller; one end of the water inlet plate is connected to the bottom of the water distribution plate, and the other end is connected to the bottom of the inner side of the impeller blades, so as to guide the water flow on the back of the water distribution plate to the blades of the impeller.

[0019] Furthermore, the side of the air inlet shroud is evenly distributed with multiple air inlets; there are multiple spiral nozzles, which are evenly distributed around the circumference.

[0020] Furthermore, the dehydration device is a three-stage dehydration device, which includes a spiral dehydration blade, a conical dehydration cylinder, and a corrugated dehydration grid, which are fixedly installed in sequence in the housing along the airflow direction. The spiral dehydration blade is located at the rear end of the volute. The water-containing airflow from the volute enters the spiral dehydration blade in a swirling manner for the first stage of dehydration, then enters the conical dehydration cylinder at the rear end for the second stage of dehydration, and finally enters the corrugated dehydration grid at the end for the third stage of dehydration. The wastewater removed in each stage is collected at the bottom of the housing under the action of centrifugal force and gravity.

[0021] Furthermore, the bottom of the housing is provided with a drainage channel, through which the wastewater is discharged.

[0022] Furthermore, the large end of the conical dehydration cylinder is the air inlet, and the small end is the air outlet; the inner wall of the conical dehydration cylinder has multiple circumferentially distributed notches, and each notch is provided with a guide plate that folds outward from the conical dehydration cylinder; the guide plate is spiral-shaped, and the spiral direction of the guide plate is opposite to the spiral direction of the spiral dehydration blades, while the swirling direction of the water-containing airflow coming out of the volute is the same as the spiral direction of the spiral dehydration blades.

[0023] Furthermore, the air inlet hood, housing, impeller, explosion-proof motor, spiral dewatering blades, and conical dewatering cylinder are all arranged coaxially.

[0024] Furthermore, the dehydration device has an independently separated motor mounting position in the middle, and the explosion-proof motor is installed in the motor mounting position and located inside the housing.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. High dust removal efficiency: Through a multi-stage mixed-flow dust collection design, employing four-stage mixed-flow dust collection technology, the dust-laden airflow and water mist are mixed multiple times, improving dust capture efficiency. In particular, through the synergistic action of the spiral nozzle, water distribution plate, impeller, and volute, the dust-laden airflow and water mist are thoroughly mixed four times, significantly improving the dust removal effect.

[0027] 2. Excellent dehydration effect: Utilizing a three-stage dehydration device, including spiral dehydration blades, a conical dehydration cylinder, and a corrugated dehydration grid, it effectively removes moisture from the airflow. This multi-stage dehydration structure ensures thorough removal of moisture from the airflow, improving the dryness of the final discharged airflow and preventing secondary contamination.

[0028] 3. Compact structure and space-saving: The design of this invention fully considers the limited space in coal mining operations. The compact structure allows the dust collector to be installed and applied within a limited space. It is particularly suitable for scenarios requiring compact installation, such as the integrated application of equipment like coal mining machines, improving the applicability and installation flexibility of the equipment.

[0029] 4. Reduced risk of clogging: This device has no dust collection screen, reducing the risk of clogging. The spiral dewatering blades and conical dewatering cylinder design in the multi-stage dewatering unit help to quickly discharge wastewater, reducing the frequency of equipment maintenance and ensuring continuous operation and dust removal efficiency.

[0030] 5. Low energy consumption and low operating cost: The design of this invention optimizes energy consumption while ensuring efficient dust removal. Through a multi-stage mixed-flow dust collection and multi-stage dehydration structure, the kinetic energy of the dust removal fan is fully utilized, reducing energy consumption in single-stage dust removal and dehydration processes, thereby lowering the overall energy consumption and operating cost of the equipment.

[0031] 6. Wide range of applications: The compact structural design and efficient dust removal and dehydration effects make the dust collector of this invention suitable not only for coal mining operations, but also for other industrial scenarios requiring dust removal, such as mining, metallurgy, and chemical industries. The equipment is highly versatile and has a wide range of applications.

[0032] 7. High safety: The use of explosion-proof motors ensures the safe operation of the equipment in flammable and explosive environments such as coal mines.

[0033] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0035] Figure 1 This is a schematic diagram of the internal structure of the compact wet dust collector in this invention.

[0036] Figure 2 This is a perspective view of the compact wet dust collector of the present invention.

[0037] Figure 3 This is a schematic diagram of the mixed-flow dust collection device in this invention.

[0038] Figure 4 This is a schematic diagram of the dehydration device in this invention.

[0039] Figure 5 for Figure 4 Sectional view of AA.

[0040] Figure 6 for Figure 4 CC section view.

[0041] Figure 7 This is a schematic diagram of the airflow direction of the mixed-flow dust collection device in this invention.

[0042] Figure 8 This is a schematic diagram of the airflow direction of the dehydration device in this invention.

[0043] Figure 9 This is a schematic diagram of the dehydration process using the conical dehydration cylinder in this invention.

[0044] Figure 10 This is a schematic diagram of the dehydration process using the corrugated dehydration grid in this invention.

[0045] Reference numerals in the attached drawings: 1-Air inlet hood; 2-Vortex casing; 3-Front casing; 4-Spiral dehydration blades; 5-Conical dehydration cylinder; 6-Corrugated dehydration grid; 7-Rear casing; 8-Spray frame; 9-Spiral nozzle; 10-Water distribution plate; 11-Water intake plate; 12-Explosion-proof motor; 13-Drain pipe; 14-Motor rear protective cover; 15-Drainage cover; 16-Impeller; 17-Guide plate. Detailed Implementation

[0046] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0047] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0048] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] Please refer to Figures 1-10 A compact wet scrubber includes a housing, with a mixed-flow dust collection device at one end and a dewatering device at the other end.

[0050] The mixed-flow dust collection device includes an air inlet hood 1 located at the end of the housing and an impeller 16, a volute 2, and an explosion-proof motor 12 located inside the housing. The impeller 16 is rotatably mounted inside the volute 2. The explosion-proof motor 12 is located outside the volute 2 and connected to the impeller 16, driving the impeller 16 to rotate. The volute 2 is fixedly mounted inside the housing, with its air inlet connected to the air inlet hood 1 and its air outlet located inside the housing. A water distribution plate 10 is coaxially mounted on the inner side of the impeller 16. The water distribution plate 10 is bowl-shaped, with its bottom connected to the impeller 16 and its opening facing the air inlet of the volute 2. A spray frame 8 is located inside the air inlet hood 1. Multiple spiral nozzles 9 are evenly distributed in a circle on the spray frame 8, and the sprayed water flows towards the water distribution plate 10.

[0051] The side of the air inlet hood 1 is provided with multiple air inlets evenly distributed in a circle. The impeller 16 is driven by the explosion-proof motor 12 to rotate and draw in the dust-laden airflow, which enters the volute 2 from the side of the air inlet hood 1.

[0052] The air inlet of the volute 2 is connected to the air inlet shroud 1 by a flow guide shroud 15. One end of the flow guide shroud 15 passes through the air inlet of the volute 2 and extends to the inside of the impeller 16 opposite to the water distribution plate 10. The cross-sectional area of ​​the air inlet end of the flow guide shroud 15 is larger than the cross-sectional area of ​​the air outlet end, so as to guide the airflow to the inside of the impeller 16.

[0053] In this embodiment, the housing includes a front housing 3 and a rear housing 7. The front housing 3 and the rear housing 7 are connected as one unit by bolts. The volute 2 is located in the front housing 3, and the corrugated dehydration grid 6 is located in the rear housing 7.

[0054] The water distribution plate 10 is provided with multiple through holes; the through holes are distributed at intervals along the generatrix of the water distribution plate 10, and multiple through holes are also evenly distributed on the circumference of each through hole. When the water jet hits the edge of the through hole, it is easier to generate atomization. At the same time, the water flow thrown out by the through holes on each circumference will also form a disc-shaped water curtain, and multiple disc-shaped water curtains will form multiple interception.

[0055] A water inlet plate 11 is provided between the bottom of the water distribution plate 10 and the impeller 16; one end of the water inlet plate 11 is connected to the bottom of the water distribution plate 10, and the other end is connected to the bottom of the inner side of the blade of the impeller 16, so as to guide the water flow on the back of the water distribution plate 10 to the blade of the impeller 16.

[0056] The dehydration device in this embodiment is a three-stage dehydration device. The dehydration device includes a spiral dehydration blade 4, a conical dehydration cylinder 5, and a corrugated dehydration grid 6, which are fixedly arranged in sequence in the housing along the airflow direction. The spiral dehydration blade 4 is located at the rear end of the volute 2. The water-containing airflow from the volute 2 enters the spiral dehydration blade 4 in a swirling manner for the first stage of dehydration. Then it enters the conical dehydration cylinder 5 at the rear end for the second stage of dehydration. Finally, it enters the corrugated dehydration grid 6 at the end for the third stage of dehydration. The wastewater removed in each stage is collected at the bottom of the housing under the action of centrifugal force and gravity.

[0057] The bottom of the front housing 3 and the rear housing 7 are provided with drainage channels, and the drain pipe 13 is connected below the drainage channels. The wastewater that is removed is discharged through the drainage channels.

[0058] The conical dehydration cylinder 5 has a large end for air inlet and a small end for air outlet. The inner wall of the conical dehydration cylinder 5 has multiple circumferentially distributed notches, and each notch is provided with a guide plate 17 that folds outward from the conical dehydration cylinder 5. The guide plate 17 is spiral in shape, and the spiral direction of the guide plate 17 is opposite to the spiral direction of the spiral dehydration blade 4. The swirling direction of the water-containing airflow coming out of the volute 2 is the same as the spiral direction of the spiral dehydration blade 4.

[0059] Among them, the air inlet hood 1, the front shell 3, the rear shell 7, the impeller 16, the explosion-proof motor 12, the spiral dewatering blades 4, and the conical dewatering cylinder 5 are all arranged coaxially.

[0060] The dehydration device has an independently separated motor mounting position in the middle. The explosion-proof motor 12 is installed in the motor mounting position and is located inside the housing. The rear end of the explosion-proof motor 12 is equipped with a motor rear protective cover 14, and the corrugated dehydration grid 6 is fitted on the motor rear protective cover 14.

[0061] The working principle of this invention is as follows:

[0062] The impeller 16 is driven by the explosion-proof motor 12 to rotate and draw in the dust-laden airflow. The dust-laden airflow enters from the side of the air inlet hood 1 and mixes with the water mist sprayed from the spiral nozzle 9 for the first time as it flows toward the impeller 16. The water jet sprayed from the spiral nozzle 9 is sprayed onto the water distribution plate 10, and the water is centrifugally thrown off the high-speed rotating water distribution plate 10, forming a disc-shaped water curtain that mixes with the dust-laden airflow for the second time. The disc-shaped water curtain formed by the water distribution plate 10 impacts the blades of the impeller 16 and, together with the water flow guided to the blades by the water inlet plate 11, forms water mist on the blade surface and between the blades, mixing with the dust-laden airflow for the third time. The water flow on the impeller 16 is thrown off by centrifugal force and collides and refracts with the volute 2 to form water mist, which finally mixes with the dust-laden airflow for the fourth time and is discharged into the drum, forming a vortex. The water-laden airflow, flowing in a swirling pattern along the volute 2, enters the front shell 3. It undergoes first-stage dehydration via the spiral dehydration blades 4, then enters the conical dehydration cylinder 5 at the rear for second-stage dehydration. As the water-laden airflow passes through the conical dehydration cylinder 5, the outlet cross-sectional area is smaller than the inlet cross-sectional area, obstructing airflow. Water droplets are separated by centrifugal force and flow along the guide plate 17 into the shell, eventually flowing into the drainage trough under gravity. Finally, the water-laden airflow enters the corrugated dehydration grid 6 at the end for third-stage dehydration. As the airflow passes through the corrugated dehydration grid 6, it continuously collides and changes direction, causing water droplets to converge and flow into the drainage trough under gravity. The wastewater removed at each stage collects at the bottom of the shell under the combined effects of centrifugal force and gravity, and is then discharged through the drainage trough.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A compact wet scrubber, comprising a housing, characterized in that: One end of the shell is equipped with a mixing flow dust collection device, and the other end is equipped with a dehydration device; The mixed-flow dust collection device includes an air inlet hood at the end of the housing and an impeller, a volute, and an explosion-proof motor inside the housing. The impeller is rotatably mounted inside the volute. The explosion-proof motor is located outside the volute and connected to the impeller, driving the impeller to rotate. The volute is fixedly mounted inside the housing, with its air inlet communicating with the air inlet hood and its air outlet located inside the housing. A water distribution plate, coaxial with the impeller, is provided on the inner side of the impeller. The water distribution plate is bowl-shaped, with its bottom connected to the impeller and its opening facing the air inlet of the volute. A spray frame is provided inside the air inlet hood. The spray frame has several spiral nozzles, and the sprayed water flows towards the water distribution plate. The air inlet hood has an air inlet on its side. An explosion-proof motor drives the impeller to rotate and draw in dust-laden airflow. The dust-laden airflow enters from the side of the air inlet hood and mixes with the water mist sprayed from the spiral nozzle as it flows toward the impeller. The water jet from the spiral nozzle is sprayed onto the water distribution plate, where it is centrifugally thrown out to form a disc-shaped water curtain, which mixes with the dust-laden airflow for the second time. The disc-shaped water curtain formed by the water distribution plate impacts the blades of the impeller, forming water mist on the blade surface and between the blades, which mixes with the dust-laden airflow for the third time. The water jet on the impeller is thrown off by centrifugal force and collides and refracts with the volute to form water mist, which finally mixes with the dust-laden airflow for the fourth time before being discharged into the drum and forming a vortex to enter the dehydration device for dehydration. The air inlet of the volute and the air inlet shroud are connected by a flow guide shroud. One end of the flow guide shroud passes through the air inlet of the volute and extends to the inside of the impeller opposite the water distribution plate. The cross-sectional area of ​​the air inlet end of the flow guide shroud is larger than the cross-sectional area of ​​the air outlet end, so as to guide the airflow to the inside of the impeller. The dehydration device is a three-stage dehydration device, comprising a spiral dehydration blade, a conical dehydration cylinder, and a corrugated dehydration grid, which are sequentially fixed inside the housing along the airflow direction. The spiral dehydration blade is located at the rear end of the volute. The water-containing airflow exiting the volute enters the spiral dehydration blade in a swirling pattern for the first stage of dehydration, then enters the conical dehydration cylinder at the rear end for the second stage of dehydration, and finally enters the corrugated dehydration grid at the end for the third stage of dehydration. The wastewater removed in each stage is collected at the bottom of the housing under the action of centrifugal force and gravity. The large end of the conical dehydration cylinder is the air inlet, and the small end is the air outlet. The inner wall of the conical dehydration cylinder has multiple circumferentially distributed notches, and each notch is equipped with a guide plate that folds outward from the conical dehydration cylinder. The guide plate is spiral-shaped, and the spiral direction of the guide plate is opposite to that of the spiral dehydration blade. The swirling direction of the water-containing airflow exiting the volute is the same as that of the spiral dehydration blade. The water distribution plate is provided with multiple through holes; the through holes are distributed at intervals along the generatrix of the water distribution plate, and multiple through holes are also evenly distributed on the circumference of each through hole; a water guide plate is provided between the bottom of the water distribution plate and the impeller; one end of the water guide plate is connected to the bottom of the water distribution plate, and the other end is connected to the bottom of the inner side of the impeller blade, so as to guide the water flow on the back of the water distribution plate to the blade of the impeller.

2. The compact wet dust collector according to claim 1, characterized in that: The side of the air inlet shroud has multiple air inlets evenly distributed; there are multiple spiral nozzles, which are evenly distributed around the circumference.

3. The compact wet dust collector according to claim 1, characterized in that: The bottom of the shell is provided with a drainage channel, through which the wastewater is discharged.

4. The compact wet scrubber according to claim 1, characterized in that: The air inlet hood, housing, impeller, explosion-proof motor, spiral dewatering blades, and conical dewatering cylinder are all arranged coaxially.

5. The compact wet dust collector according to claim 1, characterized in that: The dehydration device has an independently separated motor mounting position in the middle, and the explosion-proof motor is installed in the motor mounting position and located inside the housing.

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