Mine underground working face circulating water curtain dust removal equipment

Abstract

The invention discloses circulating water curtain dust removal equipment for an underground working face of a mine, and relates to the technical field of dust removal equipment. The equipment comprises a box body, the box body is provided with an air inlet, a containing cavity and an air outlet which are sequentially communicated, a fan is arranged at the air outlet, a water collecting tank is arranged below the bottom of the containing cavity, a partition plate is vertically arranged in the cavity, and the bottom of the partition plate is connected with a bent plate; an inclined upward extending section with a ventilation through hole and a downward extending section extending into the water collecting tank are integrally formed on the bent plate, an air flow bypassing gap is formed between the inclined upward extending section and the downward extending section, the spraying device can form a continuous wall-attached water film on each plate surface of the bent plate, the ventilation through hole and the air flow bypassing gap form an air flow bypassing channel, and the channel and the water film path are not overlapped with each other. A complete wall-attached water film is formed by utilizing the coanda effect, dust in dust-containing airflow impacts the water film and then flows into the water collecting tank along with water, air is smoothly discharged through a channel, dust removal and ventilation are effectively considered, dust removal operation is stable, and the device is suitable for mine underground operation scenes.

Description

Technical Field

[0001] This invention relates to the field of circulating water curtain dust removal technology, and in particular to a circulating water curtain dust removal device for underground mining faces. Background Technology

[0002] As a commonly used dust removal device in underground mines, the core principle of circulating water curtain dust removal equipment is to form a water curtain through water circulation to intercept and adsorb dust, thereby improving the working environment with low visibility in mines and reducing the risk of workers inhaling dust and developing pneumoconiosis.

[0003] Currently, conventional water curtain dust removal equipment in underground mines forms a suspended water curtain in the airflow channel through a spray device. A fan drives the dust-laden airflow through the suspended water curtain, causing the dust particles in the airflow to come into contact with the water curtain, agglomerate, and finally fall into the water collection tank with the water flow to complete the dust removal. If the water curtain is perfect and not torn, it becomes a "water wall" and air cannot pass through, and the dust removal equipment becomes a "blockage". If air passes through, the water curtain will inevitably break. At the moment of breakage, the fine dust following the airflow will escape through these gaps instead of being captured by the water.

[0004] In summary, existing circulating water curtain dust removal equipment is constrained by the aforementioned inherent contradictions, making it difficult to balance ventilation needs and dust removal effects. Either it cannot be properly adapted to underground operations due to air blockage, or dust escapes due to water curtain rupture, ultimately failing to achieve the ideal dust removal effect. Summary of the Invention

[0005] The purpose of this invention is to provide a circulating water curtain dust removal device for underground mining faces, so as to solve the problem that existing circulating water curtain dust removal devices are difficult to balance ventilation needs and dust removal effect, and are prone to dust escape due to air blockage or water curtain rupture.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A circulating water curtain dust removal device for underground mining faces, comprising: The housing has an air inlet, a receiving cavity, and an air outlet connected in sequence, and a fan is provided at the air outlet; A water collection tank is located below the bottom of the receiving cavity; A baffle is vertically installed in the receiving cavity and located between the air inlet and the air outlet. The top of the baffle is connected to the top wall of the box, and the bottom extends to the side near the water collection tank. A bent plate is connected to the bottom of the baffle plate. The bent plate is integrally formed with an inclined upward extension section and a downward extension section. The inclined upward extension section has several ventilation holes that penetrate the plate surface. An airflow bypass gap is formed between the inclined upward extension section and the downward extension section, and an arc-shaped flow guide surface is formed at the connection between the two. The downward extension section extends into the interior of the water collection tank. A spraying device is provided in the receiving cavity to form a continuous wall-attached water film on the inclined upward extension section, the arc-shaped guide surface and the downward extension section of the bent plate. The airflow bypass gap and several air vents together form an airflow bypass channel that connects to the air inlet and air outlet, and the airflow path of the airflow bypass channel does not overlap with the guide surface where the attached water film is located.

[0007] Furthermore, the bottom of the baffle plate extends downwards in a direction away from the air inlet.

[0008] Furthermore, the bottom end of the inclined upward extension of the bent plate is integrally formed with the bottom of the baffle plate, and the top end extends towards the air outlet, with its plate surface facing the baffle plate surface.

[0009] Furthermore, the top of the downward extension section is integrally formed with the top of the inclined upward extension section, and the bottom extends vertically into the water collection tank, with its bottom horizontal height being lower than the bottom horizontal height of the baffle plate.

[0010] Furthermore, the spraying device is located between the air inlet and the baffle, with the water spraying direction facing the baffle surface towards the air inlet, in order to guide the water flow along the baffle surface to the bending plate.

[0011] Furthermore, the plurality of vent holes are evenly arranged along the length of the inclined upward extension section and are distributed in multiple rows along the width of the bent plate; on the surface of the inclined upward extension section of the bent plate facing the baffle plate, a raised annular guide boss is integrally formed around the edge of each vent hole, and the annular guide boss is used to guide the water flow around the vent hole.

[0012] Furthermore, a filter plate is vertically installed inside the water collection tank. The filter plate is parallel to the length direction of the water collection tank and can divide the water collection tank into a sewage area close to the baffle and a clean water area away from the baffle. The water inlet of the spray device is connected to the clean water area.

[0013] Furthermore, a baffle plate is connected to the inner wall of the box, which covers the clear water area. One end of the baffle plate is seamlessly connected to the top edge of the filter plate, and the other end is fixedly connected to the inner wall of the box to prevent dust-laden water from falling directly into the clear water area.

[0014] Furthermore, the baffle plate is inclined downwards towards the filter plate, and its flow-guiding side extends to the top of the filter plate to guide dust-laden water into the sewage area.

[0015] Furthermore, the spraying device includes a spray pipe, a water pump, and several spray heads. The water inlet end of the spray pipe is connected to the clean water area of ​​the water collection tank, and the water outlet end of the spray pipe is correspondingly connected to several spray heads. The spray heads are located between the air inlet and the baffle plate and are equidistantly spaced along the width direction of the baffle plate. The spray direction of the spray heads is inclined downward toward the surface of the baffle plate facing the air inlet, so as to guide the water flow along the surface of the baffle plate to the bending plate. The water pump is connected to the spray pipe and is used to provide pumping power for the spray pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses a spray nozzle to spray water, which flows along the surface of a baffle plate. Utilizing the Coanda effect, the water adheres tightly to the plate surface and extends to the bent plate, forming a continuous and complete water film on each surface of the bent plate. Dust in the dust-laden airflow impacts the water film and is firmly adsorbed, flowing with the water along the bent plate surface into a collection trough, thus completing dust collection. Air is smoothly discharged through the gaps in the airflow and the ventilation holes. The airflow path does not overlap with the water film, achieving a highly efficient balance between dust removal and ventilation, ensuring the safety and stability of underground operations. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a partial structural diagram of the baffle plate of the present invention; Figure 4 This is a side view sectional view of the present invention.

[0019] In the picture: 1. Housing; 2. Air inlet; 3. Receiving cavity; 4. Air outlet; 5. Water collection tank; 6. Baffle plate; 7. Spray pipe; 8. Water pump; 9. Spray head; 10. Fan; 11. Bending plate; 111. Inclined upward extension section; 112. Downward extension section; 12. Ventilation hole; 14. Airflow bypass gap; 17. Filter plate; 18. Water baffle plate. Detailed Implementation

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

[0021] See Figures 1-4 This invention provides a circulating water curtain dust removal device for underground mining faces, specifically comprising: The housing 1 has an air inlet 2, a receiving cavity 3, and an air outlet 4 connected in sequence. A fan 10 is installed at the air outlet 4. A water collection tank 5 is installed at the bottom of the receiving cavity 3. A baffle 6 is vertically installed inside the receiving cavity 3. The baffle 6 is located between the air inlet 2 and the air outlet 4. The top of the baffle 6 is connected to the top wall of the housing 1, and the bottom extends to the side close to the water collection tank 5. A bent plate 11 is connected to the bottom of the baffle 6. The bent plate 11 is integrally formed with an inclined upward extension section 111 and a downward extension section 112. Several ventilation holes 12 penetrating the plate surface are opened on the inclined upward extension section 111. An airflow bypass gap 14 is formed between the inclined upward extension section 111 and the downward extension section 112. An arc-shaped guide surface is formed at the connection between the two. The downward extension section 112 extends into the interior of the water collection tank 5.

[0022] The cavity 3 is also equipped with a spraying device, which is used to form a continuous water film attached to the wall on the inclined upward extension section 111, the arc-shaped guide surface and the downward extension section 112 of the bent plate 11. The airflow bypass gap 14 and several air vents 12 together form an airflow bypass channel that is connected to the air inlet 2 and the air outlet 4, and the airflow path of the airflow bypass channel does not overlap with the guide surface where the water film is located.

[0023] This embodiment mainly addresses the core contradiction in existing circulating water curtain dust removal equipment: air passing through the curtain inevitably tears the water film, causing dust to escape and making it impossible to balance ventilation requirements and dust removal effects. Through structural design, it avoids the direct impact between airflow and the water film while ensuring that dust can be effectively captured by the water film.

[0024] After the fan 10 is started, it generates negative pressure suction, which drives the dust-laden airflow from the air inlet 2 into the receiving cavity 3. The air and dust move together with the airflow towards the bending plate 11. Due to inertia, the dust hits the attached water film on each surface of the bending plate 11. After being absorbed by the water film, it flows down the plate surface with the water flow and is carried away by the water collection tank 5. The air is diverted and discharged through the ventilation hole 12 and the airflow bypass gap 14, thus achieving air-dust separation.

[0025] To ensure a smooth transition of water flow to the bending plate 11, the following embodiments are proposed: The bottom of the baffle 6 extends downwards in a direction away from the air inlet 2.

[0026] With this structure, the water sprayed by the spray device onto the surface of the baffle 6 flows smoothly downward along the surface of the baffle under the guidance of gravity and the inclined surface, avoiding water stagnation or splashing at the bottom of the baffle 6, ensuring that the water can completely cover the bottom of the baffle 6 and flow smoothly to the bent plate 11 to form a complete water film.

[0027] To optimize the compatibility between the airflow bypass path and the water film coverage area, the following embodiments are proposed: The bottom end of the inclined upward extension section 111 of the bent plate 11 is integrally formed with the bottom of the baffle plate 6, and the top end extends towards the air outlet 4, with its plate surface facing the plate surface of the baffle plate 6.

[0028] With this structure, the water flow from the baffle plate 6 to the inclined upward extension section 111 is naturally transitioned without interruption, ensuring the continuity of the water film. At the same time, the plate surface of the inclined upward extension section 111 forms a reasonable angle with the airflow direction, which facilitates the impact of dust on the water film due to inertia, and also provides space for air to be diverted through the vent holes 12 and the airflow bypass gaps 14.

[0029] To ensure effective communication between the two airflow stages, the following implementation method is proposed: The top of the downward extension section 112 is integrally formed with the top of the inclined upward extension section 111, and the bottom extends into the water collection tank 5. The bottom horizontal height of the downward extension section 112 is lower than the bottom horizontal height of the baffle plate 6.

[0030] With this structure, the downward extension section 112 extends vertically and has a lower bottom position, so that the dust-laden airflow entering the airflow bypass gap 14 impacts the plate surface. The dust is absorbed by the water film and then washed into the water collection tank 5. After the airflow is deflected, it is discharged along the airflow bypass gap 14 and through the ventilation hole 12.

[0031] To ensure that the water flow can completely cover each guide surface of the bent plate 11, the following embodiment is proposed: The spray device is located between the air inlet 2 and the baffle 6, with the water spray direction facing the baffle 6 towards the air inlet 2, and is used to guide the water flow along the baffle 6 to the bending plate 11.

[0032] With this structure, the installation position of the spray device corresponds to the surface of the baffle plate 6 in the direction of water spraying, so that the sprayed water flow evenly covers the entire surface of the baffle plate 6. The water flow adheres to the surface of the baffle plate 6 throughout the entire process. Utilizing the Coanda effect, the water flow continues to flow downward along the surface of the baffle plate 6 under the action of the adhesion force on the plate surface. When it reaches the connection position between the baffle plate 6 and the bent plate 11, the water flow will not detach from the plate surface and drip down. Instead, it will flow continuously along the inclined upward extension section 111, the arc-shaped guide surface, and the downward extension section 112 of the bent plate 11, ensuring that the water flow can completely reach the bent plate 11 and fully cover all its guide surfaces.

[0033] To ensure a uniform airflow through the inclined upward extension section 111 and avoid uneven local airflow velocities affecting water film stability, the following embodiment is proposed: Multiple vent holes 12 are evenly arranged along the length of the inclined upward extension section 111 and distributed in multiple rows along the width of the bent plate 11. On the surface of the inclined upward extension section 111 of the bent plate 11 facing the baffle plate 6, a raised annular flow guide boss is integrally formed around the edge of each vent hole 12. The physical height of the annular flow guide boss is set to be greater than the fluid boundary layer thickness of the water film attached to the wall under normal working conditions. When the water film attached to the inclined upward extension section 111 flows downward under the drive of gravity, the annular flow guide boss forces the fluid to flow around it. This design avoids the high-speed airflow that penetrates through the vent holes 12 from directly forming a gas-liquid interface with the water film, and prevents dust-laden water droplets from being torn apart by the airflow and carried out of the system.

[0034] With this structure, the ventilation holes 12 are evenly distributed on the inclined upward extension section 111 of the plate, which facilitates the even flow of air through the plate after dust removal and ensures smooth airflow.

[0035] The water film formed by the Coanda effect will adhere closely to the outer surface of the inclined upward extension section 111 and flow. Because the water flow has the characteristic of adhering to the solid plate surface, it will not penetrate into the through hole or cover the through hole port, and the through hole will always remain unobstructed.

[0036] When the dust-laden airflow comes into contact with the inclined upward extension section 111, the dust particles in the airflow will be captured and adsorbed by the water film attached to the plate surface. The remaining gas will be impacted and guided by the plate surface under the action of airflow pressure, and will pass smoothly through each vent hole 12 through the plate surface and flow to the air outlet 4 along the preset path.

[0037] This design ensures that the airflow passes through evenly without local obstruction, and also avoids the through holes from disrupting the continuity of the water film attached to the wall, so that the water film always completely covers the surface of the inclined upward extension section 111 and continues to play a role in dust adsorption.

[0038] To achieve water resource recycling while preventing dust-laden wastewater from entering the circulating water supply, the following implementation plan is proposed: A filter plate 17 is vertically installed inside the water collection tank 5. The filter plate 17 is parallel to the length direction of the water collection tank 5 and can divide the water collection tank 5 into a sewage area close to the baffle plate 6 and a clean water area away from the baffle plate 6. The water inlet end of the spray device is connected to the clean water area.

[0039] With this structure, the downward extension section 112 extends vertically into the water collection tank 5, blocking the airflow entering the airflow bypass gap 14. After the air hits the plate surface, the dust is adsorbed and washed away by the water film, and the air is discharged along the airflow bypass gap 14.

[0040] To prevent dust-laden water from splashing into the clean water area, the following embodiments are proposed: A baffle plate 18 is connected to the inner wall of the housing 1. The baffle plate 18 covers the clear water area directly above it. One end of the baffle plate 18 is seamlessly connected to the top edge of the filter plate 17, and the other end is fixedly connected to the inner wall of the housing 1. It is used to prevent dust-laden water from falling directly into the clear water area.

[0041] With this structure, the baffle plate 18 forms a complete physical protective barrier above the clear water area, preventing dusty water dripping from the bent plate 11 from splashing into the clear water area. The seamless connection prevents water from seeping into the clear water area from the connection between the baffle plate 18 and the filter plate 17, ensuring that the water quality in the clear water area is not polluted.

[0042] To guide dust-laden water into the wastewater area and prevent water from dripping indiscriminately, the following implementation method is proposed: The baffle plate 18 is inclined downwards towards the filter plate 17, and its flow-guiding side extends to the top of the filter plate 17 to guide the dust-laden water flow into the sewage area.

[0043] With this structure, the dust-laden water that drips onto the baffle plate 18 is guided by the inclined plate surface and flows along the plate surface towards the filter plate 17, eventually flowing into the sewage area through the drainage side, thus preventing the water from stagnating on the baffle plate 18 or dripping randomly to the perimeter of the clean water area.

[0044] To ensure uniform spraying and water film formation, the following embodiments are proposed: The spraying device includes a spray pipe 7, a water pump 8, and several spray heads 9. The water inlet end of the spray pipe 7 is connected to the clean water area of ​​the water collection tank 5, and the water outlet end of the spray pipe 7 is connected to several spray heads 9. The spray heads 9 are located between the air inlet 2 and the baffle 6 and are equidistantly spaced along the width direction of the baffle 6. The spray direction of the spray heads 9 is inclined downward toward the baffle 6 facing the air inlet 2, so as to guide the water flow along the baffle 6 to the bending plate 11. The water pump 8 is connected to the spray pipe 7 and is used to provide pumping power for the spray pipe 7.

[0045] With this structure, the water pump 8 provides continuous pumping power to the spray pipe 7, ensuring that water in the clean water zone can be continuously delivered to the spray head 9. The spray head 9 is evenly distributed along the width of the baffle 6, so that the water flow can evenly cover the entire surface of the baffle 6 in the width direction, forming a complete water film. The downward spray direction matches the angle of the baffle 6, further ensuring that the water flow adheres to the surface of the baffle, providing a uniform water supply for the formation of a continuous wall-attached water film.

[0046] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A circulating water curtain dust removal device for underground mining faces, characterized in that, include: The box (1) has an air inlet (2), a receiving cavity (3) and an air outlet (4) connected in sequence, and a fan (10) is provided at the air outlet (4). A water collection tank (5) is located below the bottom of the receiving cavity (3); The baffle (6) is vertically installed in the cavity (3) and located between the air inlet (2) and the air outlet (4). The top of the baffle (6) is connected to the top wall of the box (1), and the bottom extends to the side near the water collection tank (5). A bent plate (11) is connected to the bottom of the baffle plate (6). The bent plate (11) is integrally formed with an inclined upward extension section (111) and a downward extension section (112). The inclined upward extension section (111) has several ventilation holes (12) that penetrate the plate surface. An airflow bypass gap (14) is formed between the inclined upward extension section (111) and the downward extension section (112). An arc-shaped flow guide surface is formed at the connection between the two. The downward extension section (112) extends into the water collection tank (5). A spraying device is provided in the receiving cavity (3) for forming a continuous wall-attached water film on the inclined upward extension section (111) plate surface, the arc-shaped guide surface and the downward extension section (112) plate surface of the bent plate (11); The airflow bypass gap (14) and several air perforations (12) together form an airflow bypass channel that is connected to the air inlet (2) and the air outlet (4), and the airflow path of the airflow bypass channel does not overlap with the guide surface where the attached water film is located.

2. The circulating water curtain dust removal equipment for underground mining faces according to claim 1, characterized in that: The bottom of the baffle (6) extends downward in a direction away from the air inlet (2).

3. The circulating water curtain dust removal equipment for underground mining faces according to claim 1 or 2, characterized in that: The bottom end of the inclined upward extension section (111) of the bent plate (11) is integrally formed with the bottom of the baffle plate (6), and the top end extends toward the air outlet (4), and its plate surface is set toward the plate surface of the baffle plate (6).

4. The circulating water curtain dust removal equipment for underground mining faces according to claim 3, characterized in that: The top of the downward extension section (112) is integrally formed with the top of the inclined upward extension section (111), and the bottom extends vertically into the water collection tank (5), and its bottom horizontal height is lower than the bottom horizontal height of the baffle plate (6).

5. The circulating water curtain dust removal equipment for underground mining faces according to claim 1, characterized in that: The spraying device is located between the air inlet (2) and the baffle (6), and the water spraying direction is towards the baffle (6) facing the air inlet (2), which is used to guide the water flow along the baffle (6) to the bending plate (11).

6. The circulating water curtain dust removal equipment for underground mining faces according to claim 3 or 4, characterized in that: Multiple air vents (12) are evenly arranged along the length of the inclined upward extension section (111) and are distributed in multiple rows along the width of the bent plate (11); on the surface of the inclined upward extension section (111) of the bent plate (11) facing the baffle plate (6), a raised annular guide boss is integrally formed around the edge of each air vent (12), and the annular guide boss is used to guide water flow around the air vent (12).

7. The circulating water curtain dust removal equipment for underground mining faces according to claim 1, characterized in that: A filter plate (17) is vertically installed inside the water collection tank (5). The filter plate (17) is parallel to the length direction of the water collection tank (5) and can divide the water collection tank (5) into a sewage area close to the baffle plate (6) and a clean water area away from the baffle plate (6). The water inlet of the spray device is connected to the clean water area.

8. The circulating water curtain dust removal equipment for underground mining faces according to claim 7, characterized in that: The inner wall of the box (1) is connected to a baffle plate (18), which covers the clear water area. One end of the baffle plate (18) is seamlessly connected to the top edge of the filter plate (17), and the other end is fixedly connected to the inner wall of the box (1) to prevent dusty water from falling directly into the clear water area.

9. The circulating water curtain dust removal equipment for underground mining faces according to claim 8, characterized in that: The baffle plate (18) is inclined at a gradually lower angle toward the filter plate (17), and its flow-guiding side extends to the top of the filter plate (17) to guide the dust-laden water flow into the sewage area.

10. The circulating water curtain dust removal equipment for underground mining faces according to claim 1, characterized in that: The spraying device includes a spray pipe (7), a water pump (8), and several spray heads (9). The water inlet end of the spray pipe (7) is connected to the clear water area of ​​the water collection tank (5), and the water outlet end of the spray pipe (7) is connected to several spray heads (9). The spray heads (9) are located between the air inlet (2) and the baffle (6) and are equidistantly spaced along the width direction of the baffle (6). The spray direction of the spray heads (9) is inclined downward toward the baffle (6) toward the air inlet (2) so as to guide the water flow along the baffle (6) to the bending plate (11). The water pump (8) is connected to the spray pipe (7) and is used to provide pumping power to the spray pipe (7).

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