Compact wet dust collector mixed flow dust collection device

Abstract

The application provides a compact wet dust remover mixed flow dust catcher, and belongs to the technical field of coal mine dust removal. The device comprises a shell provided with an air inlet cover at one end, the side of the air inlet cover is provided with an air inlet for sucking in dust-containing airflow; an impeller, a volute and an explosion-proof motor are arranged in the shell, the impeller is rotatably arranged in the volute, the explosion-proof motor is arranged outside the volute and connected with the impeller to drive the impeller to rotate; the volute is fixedly arranged in the shell, the air inlet is communicated with the air inlet cover, and an air outlet is arranged in the shell. The inner side of the impeller is provided with a water distribution disc coaxial with the impeller, the water distribution disc is in the shape of a bowl, the bottom of the water distribution disc is connected with the impeller, and the opening of the water distribution disc faces the air inlet of the volute; a spray frame is arranged in the air inlet cover, a plurality of spiral nozzles are arranged on the spray frame, and the water flow sprayed by the spiral nozzles faces the water distribution disc. The four-stage mixed flow dust catcher can effectively improve the dust catching efficiency of the dust remover in a compact space, the dust catcher without a dust catching net reduces the risk of blockage and maintenance time, plays a key role in reducing the volume of the dust remover, and can be installed on a coal mining machine.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coal mine dust removal and relates to a compact wet dust collector mixed flow dust capturing device. BACKGROUND

[0002] In the process of coal mining, a large amount of coal dust generated by the coal cutting machine is the main dust source of the fully mechanized working face. These coal dust not only seriously pollutes the working environment and harms the health of workers, but also affects the normal operation of equipment and even causes safety accidents. Therefore, coal mine dust removal technology has become an important part of coal mine safety production. At present, the common dust removal devices on the market mainly include two categories: dry dust collectors and wet dust collectors.

[0003] Dry dust collectors capture dust in the air through filtration, centrifugal separation or electrostatic methods. The main types include bag dust collectors, electrostatic dust collectors and cyclone dust collectors. Wet dust collectors capture dust particles in the air through water or other liquid media. The main types include Venturi dust collectors, spray tower dust collectors and wet electrostatic dust collectors. The existing dry and wet dust removal technologies have the following main shortcomings in actual application:

[0004] 1. Low dust removal efficiency: The existing dry dust collectors have poor capture effect on small dust particles, and although the wet dust collectors have good dust removal effect, they have high energy consumption and high operating cost.

[0005] 2. Complex equipment, difficult to maintain: Electrostatic dust collectors and wet electrostatic dust collectors have complex structure and high requirements for operating environment, and need frequent maintenance and cleaning, which increases the operation difficulty and maintenance cost.

[0006] 3. Large volume, occupies more space: Many dust removal equipment has large volume and occupies a lot of space, which is not conducive to installation and application in limited space, especially for integrated application of coal cutting machines and other equipment.

[0007] 4. Serious clogging problem: The filter screen of the dust collector is easy to be clogged due to dust accumulation, which needs frequent cleaning and affects the continuous operation of the equipment and the dust removal effect.

[0008] 5. Not suitable for space-limited scenarios: The existing dust removal equipment generally has large volume and is not suitable for space-limited scenarios that require compact installation, such as coal cutting machines and other equipment, which limits its application range.

[0009] With the popularization of large mining height fully mechanized mining face, the mining field is large, and the cutting coal dust intensity is large. For the dust generated by the coal cutting machine, there is no other effective dust reduction measures except for spraying. Therefore, the dust control of the coal cutting machine has become a big problem. Combined with the dust reduction and control technology of the dust collector in the spare field space, the dust removal technology and equipment have become a hot spot. However, the matching mode of the dust collector and the coal cutting machine is directly related to the dust removal effect and the applicability and reliability of the dust collector. However, due to the limitation of the mining space and the moving mode, the existing dust collector is difficult to form a good dust removal effect with the coal cutting machine.

[0010] In view of the above problems, a compact dust removal device with high dust removal efficiency is needed to improve the dust removal effect and efficiency of coal mining, and to ensure the health of workers and the safe operation of equipment. SUMMARY

[0011] Therefore, the purpose of the present application is to solve the above problems, and to provide a compact wet dust collector mixed flow dust collection device.

[0012] To achieve the above purpose, the present application provides the following technical scheme:

[0013] A compact wet dust collector mixed flow dust collection device, comprising a shell provided with an air inlet cover at one end, the side of the air inlet cover being provided with an air inlet for sucking in dust-containing airflow; a impeller, a volute and a explosion-proof motor are arranged in the shell;

[0014] The impeller is rotatably arranged in the volute; the explosion-proof motor is arranged outside the volute and connected with the impeller to drive the impeller to rotate; the volute is fixedly arranged in the shell, the air inlet of the volute is communicated with the air inlet cover, and the air outlet of the volute is located in the shell;

[0015] The inner side of the impeller is provided with a water distribution disc coaxial with the impeller, the water distribution disc is in the shape of a bowl, the bottom is connected with the impeller, and the opening is directed to the air inlet of the volute; the air inlet cover is provided with a spray frame; a plurality of spiral nozzles are arranged on the spray frame, and the water flow sprayed by the spiral nozzles is directed to the water distribution disc;

[0016] The explosion-proof motor drives the impeller to rotate to suck in the dust-containing airflow, the dust-containing airflow enters from the side of the air inlet cover, and is mixed with the water mist sprayed by the spiral nozzles for the first time during flowing to the impeller; the water flow sprayed by the spiral nozzles is sprayed onto the water distribution disc, and the water flow is centrifugally thrown off on the high-speed rotating water distribution disc to form a disc-shaped water curtain and be mixed with the dust-containing airflow for the second time; the disc-shaped water curtain formed by the water distribution disc collides with the blades of the impeller to form water mist on the surface of the blades and between the blades, and is mixed with the dust-containing airflow for the third time; the water flow on the impeller is thrown off by the centrifugal force and collides with the volute to refract and form water mist, which is finally mixed with the dust-containing airflow for the fourth time and discharged into the drum, and forms a cyclone.

[0017] Further, the air inlet of the volute is communicated with the air inlet cover through a flow guide cover, one end of the flow guide cover penetrates the air inlet of the volute and extends to the inside of the impeller opposite to the water distribution disc; the flow guide cover guides the airflow to the inside of the impeller.

[0018] Further, the cross-sectional area of the air inlet end of the flow guide cover is greater than that of the air outlet end.

[0019] Further, a plurality of through holes are arranged on the water distribution disc.

[0020] Further, the through holes are distributed along the generatrix of the water distribution disc, and a plurality of through holes are also distributed on the circumference of each through hole.

[0021] Further, a water guide disc is arranged between the bottom of the water distribution disc and the impeller; one end of the water guide disc is connected with the bottom of the water distribution disc, and the other end is connected with the inside bottom of the blade of the impeller, so as to guide the water flow on the back of the water distribution disc to the blade of the impeller.

[0022] Further, a plurality of air inlets are uniformly distributed on the side surface of the air inlet cover.

[0023] Further, a plurality of spiral nozzles are arranged in a circumferential distribution.

[0024] Further, the air inlet cover, the shell, the impeller and the explosion-proof motor are coaxially arranged, so that the structure is compact and the occupied space is small.

[0025] The beneficial effects of the present application are as follows:

[0026] 1. High-efficiency dust capture:

[0027] The four-stage mixed-flow dust capture technology is adopted, and through the multiple mixing of the spiral nozzles, the water distribution disc, the impeller and the volute, the multiple sufficient contact of the dust-containing airflow and the water mist is realized, so that the dust removal efficiency is greatly improved. The dust-containing airflow is mixed with the sprayed water mist for the first time in the air inlet process; the water flow is centrifugally thrown out on the high-speed rotating water distribution disc to form a water curtain, and is mixed with the dust-containing airflow for the second time; the water curtain formed by the water distribution disc impacts the impeller blades to form the third mixing; the water flow on the impeller is thrown out under the action of the centrifugal force, and finally is mixed with the airflow for the fourth time in the volute. The multi-stage mixing makes the dust particles in the airflow be fully captured.

[0028] 2. Reduce the risk of blockage:

[0029] The device is designed without a dust capture net, reducing the risk of blockage. The traditional dust removal equipment is usually equipped with a dust capture net or a filter screen, which is easy to be blocked due to dust accumulation and needs to be cleaned and maintained frequently. The device captures dust through water mist, without the need for a dust capture net, avoiding this problem.

[0030] 3. Reduce maintenance cost:

[0031] Without a dust collecting net, the frequent maintenance requirements caused by blockage are avoided, significantly reducing maintenance costs and time, and improving the reliability and efficiency of the equipment.

[0032] 4. Compact structure design:

[0033] The device adopts coaxial arrangement, with the air inlet hood, shell, impeller and explosion-proof motor arranged coaxially, compact structure, small space occupation. This design makes the device realize efficient dust removal in limited space, and is convenient to install and apply on coal mining machines and other equipment. The compact design not only reduces the floor area of the equipment, but also facilitates the movement and installation of the device, especially suitable for the working environment of coal mining machines.

[0034] 5. High safety:

[0035] The explosion-proof motor design ensures safe use in flammable and explosive working environments such as coal mines, avoiding safety hazards caused by motor sparks.

[0036] 6. Wide application range:

[0037] Due to its high efficiency, compactness and safety design, the device is not only suitable for coal mining machines, but also can be applied to other industrial fields that require efficient dust removal, such as metallurgy, building materials and chemical industry.

[0038] Other advantages, objects and features of the present application will be described in the following specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the preferred detailed description of the present application will be combined with the drawings as follows, wherein:

[0040] Figure 1 It is an internal structure diagram of the compact wet dust collector mixed flow dust collecting device in the present application.

[0041] Figure 2 It is Figure 1 A-A sectional view.

[0042] Figure 3 It is a perspective view of the compact wet dust collector mixed flow dust collecting device in the present application.

[0043] Figure 4 It is a schematic diagram of the air flow direction of the compact wet dust collector mixed flow dust collecting device in the present application.

[0044] Reference signs: 1 - air inlet hood; 2 - spray frame; 3 - spiral nozzle; 4 - guide cover; 5 - water distribution tray; 6 - water guide tray; 7 - impeller; 8 - volute; 9 - roller; 10 - explosion-proof motor. DETAILED DESCRIPTION

[0045] The advantages and effects of the present application can be easily understood by those skilled in the art from the description. The present application can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made to the details in the description based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and the following examples and features in the examples can be combined with each other without conflict.

[0046] The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the present application; in order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0047] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0048] Please refer to Figures 1 to 4 A compact wet dust collector mixed flow dust collection device, comprising a shell provided with an air inlet hood 1 at one end, the side of the air inlet hood 1 is provided with an air inlet for sucking in dust-containing airflow; an impeller 7, a volute 8 and an explosion-proof motor 10 are arranged in the shell; the impeller 7 is rotatably installed in the volute 8; the explosion-proof motor 10 is installed outside the volute 8 and connected with the impeller 7 to drive the impeller 7 to rotate; the volute 8 is fixedly arranged in the shell, the air inlet of the volute 8 is communicated with the air inlet hood 1, and the air outlet of the volute 8 is located in the shell; the air inlet hood 1, the shell, the impeller 7 and the explosion-proof motor 10 are coaxially arranged, the structure is compact, and the space occupied is small.

[0049] The inner side of the impeller 7 is provided with a co-axial water distribution disc 5, which is in the shape of a bowl, with the bottom connected to the impeller 7 and the opening facing the air inlet of the volute 8; the air inlet cover 1 is provided with a spray frame 2; the spray frame 2 is provided with a plurality of spiral nozzles 3, and the water flow sprayed by the spiral nozzles 3 is directed towards the water distribution disc 5; the water distribution disc 5 is provided with a plurality of through holes. The through holes are distributed along the generatrix of the water distribution disc 5, and there are also a plurality of through holes distributed on each circumference of the through holes. The water jet is more likely to be atomized when it hits the edge of the through hole, and the water flow sprayed from each through hole on the circumference also forms a disc-shaped water curtain, and multiple disc-shaped water curtains form multiple interception channels.

[0050] A water guide disc 6 is arranged between the bottom of the water distribution disc 5 and the impeller 7; one end of the water guide disc 6 is connected to the bottom of the water distribution disc 5, and the other end is connected to the inner side of the blade of the impeller 7, so as to guide the water flow on the back of the water distribution disc 5 to the blade of the impeller 7.

[0051] The air inlet of the volute 8 is communicated with the air inlet cover 1 through a flow guide cover 4, one end of the flow guide cover 4 penetrates through the air inlet of the volute 8 and extends to the inner side of the impeller 7 opposite to the water distribution disc 5; the flow guide cover 4 guides the airflow to the inner side of the impeller 7. The cross-sectional area of the air inlet end of the flow guide cover 4 is larger than that of the air outlet end.

[0052] The side surface of the air inlet cover 1 in the embodiment is circumferentially provided with a plurality of air inlets. The spiral nozzles 3 are also circumferentially distributed.

[0053] The working principle of the present application is as follows:

[0054] The impeller 7 is driven to rotate by the explosion-proof motor 10 to suck in the dust-containing airflow, the dust-containing airflow enters from the side of the air inlet cover 1, and is mixed with the water mist sprayed by the spiral nozzles 3 for the first time during the flow to the impeller 7; the water flow sprayed by the spiral nozzles 3 is sprayed onto the water distribution disc 5, and the water flow is centrifugally thrown off on the high-speed rotating water distribution disc 5 to form a disc-shaped water curtain and be mixed with the dust-containing airflow for the second time; the disc-shaped water curtain formed by the water distribution disc 5 hits the blade of the impeller 7, and the water flow guided to the blade by the water guide disc 6 forms a water mist between the surface of the blade and the blade, and is mixed with the dust-containing airflow for the third time; the water flow on the impeller 7 is thrown off by the centrifugal force and collides with the volute 8 to refract and form a water mist, which is finally mixed with the dust-containing airflow for the fourth time and discharged into the drum 9, and a cyclone is formed. The subsequent slag and water separation is realized.

[0055] The present application can effectively improve the dust collection efficiency of the dust collector in a compact space by utilizing four-stage mixed flow to collect dust, and the dust collection net reduces the risk of blockage and maintenance time, which plays a key role in reducing the volume of the dust collector, and the dust collector can be installed and applied on a coal mining machine.

[0056] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions, and all should be covered in the scope of the claims of the present application.

Claims

1. A compact wet scrubber mixed-flow dust collection device, characterized in that, It includes a housing with an air inlet hood at one end, and an air inlet on the side of the air inlet hood for drawing in dust-laden airflow; the housing contains an impeller, a volute, and an explosion-proof motor. The impeller is rotatably disposed inside the volute; the explosion-proof motor is disposed outside the volute and connected to the impeller to drive the impeller to rotate; the volute is fixedly disposed inside the housing, the air inlet of the volute is connected to the air inlet cover, and the air outlet of the volute is located inside the housing. The impeller has a coaxial water distribution plate on its inner side. The water distribution plate is bowl-shaped, with its bottom connected to the impeller and its opening facing the air inlet of the volute. The air inlet shroud has a spray frame. The spray frame has several spiral nozzles, and the sprayed water flows towards the water distribution plate. An explosion-proof motor drives the impeller to rotate, drawing in dust-laden airflow. The airflow enters from the side of the inlet hood and mixes for the first time with 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, 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 impeller blades, forming water mist on and between the blade surfaces, which mixes with the dust-laden airflow for the third time. Under the action of centrifugal force, the water jet on the impeller is thrown off and collides and refracts with the volute, forming water mist, which finally mixes with the dust-laden airflow for the fourth time before being discharged into the drum, forming a swirling flow. 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 flow guide shroud guides the airflow to the inside of the impeller. 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. The water distribution plate is provided with multiple through holes; 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; multiple air inlets are evenly distributed on the side of the air inlet shroud.

2. The compact wet scrubber mixed-flow dust collection device according to claim 1, characterized in that: 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.

3. The compact wet scrubber mixed-flow dust collection device according to claim 1, characterized in that: There are multiple spiral nozzles, which are evenly distributed around the circumference.

4. The compact wet scrubber mixed-flow dust collection device according to claim 1, characterized in that: The air inlet shroud, housing, impeller, and explosion-proof motor are arranged coaxially.

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