An underground mine sewage treatment device and treatment method

Abstract

The application discloses an underground mine sewage treatment device and treatment method, and relates to the field of sewage treatment. The device comprises a pre-sedimentation tank, a first adjusting tank, a second adjusting tank, a purification sedimentation tank, a reflux cylinder, a stirring mechanism arranged in the reflux cylinder, a guide plate arranged above the stirring mechanism, and a heavy medium releasing device arranged between the stirring mechanism and the guide plate in the reflux cylinder. The device and method can suck up the sewage from the bottom of the second adjusting tank, make the sewage flow upwards from the bottom of the reflux cylinder, form a water flow around the reflux cylinder by the guide plate, reduce the range of dead angle position in the second adjusting tank, and improve the efficiency of the flocculation process in the second adjusting tank.

Description

Technical Field

[0001] This invention relates to wastewater treatment technology, specifically to an underground mine wastewater treatment device and method. Background Technology

[0002] Coal mine water is water that seeps into the mine from underground or the surface during coal mining. It is characterized by high suspension and high mineralization. The suspended solids are characterized by small particle size, light specific gravity, and slow settling speed. Some of the fine colloids formed cannot settle naturally. In actual engineering, coagulants and coagulant aids are usually added to the equalization tank to destabilize and aggregate the impurity particles in the water, forming flocs with larger diameters. Then, sedimentation is carried out in the sedimentation tank (or clarification tank) to remove suspended solids and turbidity from the water.

[0003] However, during the process of adding coagulants to sewage, the mixing efficiency between the coagulants and sewage is low due to the continuous transport of sewage, which results in a longer flocculation time and a slower sedimentation rate of the flocs, thus affecting the sewage treatment efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an underground mine wastewater treatment device and method to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an underground mine wastewater treatment device, comprising a pre-sedimentation tank, a first equalization tank, a second equalization tank, and a purification sedimentation tank, and further comprising:

[0006] A return cylinder is installed inside the second equalization tank. A stirring mechanism is installed inside the return cylinder to make the sewage flow upward from the bottom of the return cylinder. A guide plate is also installed inside the return cylinder, and the guide plate is located above the stirring mechanism.

[0007] A heavy medium release device is installed inside a reflux cylinder and located between a stirring mechanism and a guide plate. The heavy medium release device includes a storage tank. Four blades arranged in a circular array are fixedly installed on the bottom periphery of the storage tank. The blades have cavities. The two sides of the blades in the width direction have discharge holes that communicate with the external space. The bottom of the storage tank is provided with four feeding mechanisms corresponding to the four blades. Each feeding mechanism includes a feeding chamber at the bottom of the storage tank, a first channel communicating between the inside of the storage tank and the feeding chamber, and a second channel communicating between the feeding chamber and an adjacent cavity. A first one-way valve and a second one-way valve are respectively installed in the first and second channels. A piston head is slidably connected to the inner wall of the feeding chamber at the end away from the adjacent cavity. The feeding mechanism also includes a first driving component for driving each piston head to reciprocate in each feeding chamber. When the piston head moves, the first one-way valve only allows the material in the storage tank to flow to the feeding chamber, and the second one-way valve only allows the material in the feeding chamber to flow to the cavity.

[0008] The top of the storage tank is connected to a cover plate, and the top of the cover plate is provided with a heavy medium inlet and a liquid inlet.

[0009] Furthermore, the storage tank is connected to a second drive unit for driving it to move along the axial direction of the return cylinder.

[0010] Furthermore, the cover plate is rotatably connected to the top of the storage tank, and the paddle blades are arranged at an angle.

[0011] Furthermore, a fixed shaft is fixedly connected to the middle of the cover plate, the lower end of the fixed shaft is rotatably connected to the bottom of the storage tank, and the upper end of the fixed shaft is connected to a second driving component.

[0012] Furthermore, the first driving component includes four pulleys, each pulley having a first rotating shaft rotatably connected to its center. The two ends of each first rotating shaft are rotatably connected to the end of each piston head away from the feeding chamber. Connecting rods are rotatably connected to the first rotating shafts on both sides of the pulleys, and the two connecting rods are rotatably connected to two adjacent first rotating shafts. The first driving component also includes a cam, the circumference of which abuts against the circumference of the four pulleys. The cam is fixedly mounted on a fixed shaft surface. When the cam rotates relative to the four pulleys, it can drive two piston heads in symmetrical positions to move closer or further apart.

[0013] Furthermore, the bottom of the inner wall of the storage hopper bulges upward in a frustum shape.

[0014] Furthermore, a scraper is provided inside the storage bin, with one end of the scraper fixedly connected to the surface of the fixed shaft.

[0015] Furthermore, a feeding mechanism is also installed inside the storage hopper. The feeding mechanism includes a first gear and a second gear. The first gear is rotatably connected to the surface of a fixed shaft. The bottom of the first gear is fixedly connected to the bottom of the inner wall of the storage hopper. The second gear is located above the first gear and meshes with it. The second gear is slidably connected to the surface of the fixed shaft. A rotating ring is rotatably connected to the inner surface of the first gear. The rotating ring is rotatably connected to the fixed shaft. A spring is fixedly installed on the top of the rotating ring. The other end of the spring is fixedly connected to the inner surface of the second gear. The spring tension acts on the first gear and the second gear to make them tend to move closer to each other.

[0016] Furthermore, a feeding auger is fixedly installed on the top of the second gear, the inner side of the feeding auger is slidably connected to the fixed shaft surface, and the outer side of the feeding auger is slidably connected to the inner wall of the storage barrel.

[0017] A method for treating wastewater in underground mines, applicable to the underground mine wastewater treatment device described above, specifically includes the following steps:

[0018] S101. The wastewater settled in the pre-sedimentation tank is transported to the first equalization tank, and coagulant is added and stirred in the first equalization tank.

[0019] S102. Start the stirring mechanism in the second regulating tank to make the sewage flow back from the bottom of the return cylinder upwards;

[0020] S103. The heavy medium and flocculant are released in the reflux cylinder through the heavy medium release device.

[0021] Compared with the prior art, the underground mine wastewater treatment device and method provided by the present invention have the following beneficial effects:

[0022] 1. The underground mine wastewater treatment device and method, by setting up a return cylinder and a stirring mechanism installed at the bottom of the return cylinder, allows wastewater to be sucked up from the bottom of the second equalization tank and flow upward from the bottom of the return cylinder. With the help of the guide plate, a water flow is formed around the return cylinder, reducing the range of dead zones in the second equalization tank and improving the efficiency of the flocculation process in the second equalization tank.

[0023] 2. The underground mine wastewater treatment device and method, through the installation of a heavy medium release device, allows the heavy medium to be released in the return cylinder near the bottom of the wastewater in the second regulating tank. This allows the heavy medium to be rapidly dispersed in the return cylinder and move upward with the water flow. After flowing outside the return cylinder, it mixes with the external wastewater. This allows the heavy medium to have a longer contact time during the initial mixing process with the wastewater before falling to the bottom of the tank, facilitating preliminary flocculation on the surface of the heavy medium. This facilitates the extension of the subsequent flocculation process, ensuring that its function as a carrier is fully utilized in the flocculation process and further improving the flocculation efficiency.

[0024] 3. The underground mine wastewater treatment device and method, through the set feeding mechanism, reduces the moving speed of the clumped or agglomerated heavy media by the feeding auger. Under the vibration of the feeding auger, the clumped or agglomerated heavy media are dispersed. When using magnetic powder as the heavy media, the vibration of the feeding auger can also eliminate part of the magnetism of the magnetic powder, reduce its agglomerating force, facilitate its effective dispersion, and ensure the role of the added heavy media in the wastewater treatment process. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of the wastewater treatment device provided in an embodiment of the present invention;

[0027] Figure 2 A front view of the reflux cylinder and stirring mechanism provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of a partial longitudinal section of the reflux cylinder provided in an embodiment of the present invention;

[0029] Figure 4 This is a partial structural diagram of the heavy medium release device provided in an embodiment of the present invention;

[0030] Figure 5 Provided for embodiments of the present invention Figure 4 A partial longitudinal section diagram;

[0031] Figure 6 This is a schematic diagram of the cam separation state in the first drive component provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the feeding mechanism installed inside the storage bin according to an embodiment of the present invention;

[0033] Figure 8 Provided for embodiments of the present invention Figure 7 Enlarged view of point A in the middle.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Pre-sedimentation tank; 2. First equalization tank; 3. Second equalization tank; 4. Purification sedimentation tank; 5. Reflux cylinder; 6. Stirring mechanism; 7. Guide plate; 8. Heavy medium release device; 81. Storage tank; 82. Paddle; 83. Cavity; 84. Discharge port; 85. Feeding mechanism; 851. Feeding chamber; 852. First channel; 853. Second channel; 854. First check valve; 855. Second check valve; 856. Piston head; 8 6. First driving component; 861. Pulley; 862. First rotating shaft; 863. Connecting rod; 864. Cam; 865. Scraper; 87. Cover plate; 871. Heavy medium inlet; 872. Liquid inlet; 873. Fixed shaft; 88. Second driving component; 89. Discharging mechanism; 891. First gear; 892. Second gear; 893. Rotary ring; 894. Spring; 895. Discharging auger; 896. Discharge hole;

[0036] 100, frame; 200, drainage pump; 300, first mixer; 400, coagulant inlet; 500, reflux pump; 600, hydrocyclone. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] For examples, please refer to Figure 1 - Figure 8 An underground mine wastewater treatment device includes a pre-sedimentation tank 1, a first equalization tank 2, a second equalization tank 3, and a purification sedimentation tank 4. The purification sedimentation tank 4 typically uses an inclined tube sedimentation tank, etc. In operation, raw mine water is pumped to the pre-sedimentation tank 1 by a drainage pump 200, causing large particles and denser substances in the water to settle. The supernatant water in the pre-sedimentation tank 1 is then pumped to the first equalization tank 2. Coagulant is added to the first equalization tank 2 through the coagulant inlet 400, and the process in the first equalization tank 2 is started. The first mixer 300 stirs the sewage in the first equalization tank 2 to make the coagulant and sewage evenly mixed. In the second equalization tank 3, flocculant and heavy medium are added to make the suspended solids in the sewage form flocs with heavy medium as carrier in a short time. Finally, the flocs flow to the purification sedimentation tank 4 for sedimentation. The sedimented sludge is sent to the hydrocyclone 600 by the return pump 500 to separate the heavy medium and sludge. The separated heavy medium is repeatedly added to the second equalization tank 3, and the sludge is pumped to the collection tank, thereby repeatedly treating the sewage.

[0039] In one embodiment of the present invention, a reflux cylinder 5 is provided inside the second regulating tank 3, and a stirring mechanism 6 is provided inside the reflux cylinder 5. The stirring mechanism 6 is used to make the sewage flow upward from the bottom of the reflux cylinder 5. A guide plate 7 is also provided inside the reflux cylinder 5, and the guide plate 7 is located above the stirring mechanism 6, so that when the sewage flows in the second regulating tank 3, it flows around the reflux cylinder 5. Figure 1 As shown, the guide plate 7 forms a certain anti-eddy current effect, reduces the range of dead corners in the second regulating tank 3, improves the efficiency of the flocculation process in the second regulating tank 3, avoids the problem that the wastewater in the range of the dead corners cannot be effectively mixed with the flocculant due to the large range of dead corners, and avoids the problem that some flocculated sediment cannot flow to the purification sedimentation tank 4 after being generated.

[0040] In one embodiment of the present invention, a heavy medium release device 8 is further provided inside the reflux cylinder 5, located between the stirring mechanism 6 and the guide plate 7. The heavy medium release device 8 includes a storage tank 81, and four blades 82 arranged in a circular array are fixedly installed on the bottom periphery of the storage tank 81. A cavity 83 is opened in the blade 82, and discharge holes 84 communicating with the external space are opened on both sides of the blade 82 in the width direction. Four feeding mechanisms 85 corresponding to the four blades 82 are provided at the bottom of the storage tank 81. The feeding mechanism 85 includes a feeding chamber 851 opened at the bottom of the storage tank 81 and a first channel 85 communicating with the inside of the storage tank 81 and the feeding chamber 851. 2. A second channel 853 connecting the feeding chamber 851 and the adjacent cavity 83. A first check valve 854 and a second check valve 855 are respectively installed in the first channel 852 and the second channel 853. A piston head 856 is slidably connected to the inner wall of the end of the feeding chamber 851 away from the adjacent cavity 83. The feeding mechanism 85 also includes a first driving member 86 for driving each piston head 856 to reciprocate in each feeding chamber 851. When the piston head 856 moves, the first check valve 854 only allows the material in the storage tank 81 to flow to the feeding chamber 851, and the second check valve 855 only allows the material in the feeding chamber 851 to flow to the cavity 83.

[0041] The top of the storage tank 81 is connected to a cover plate 87, and the top of the cover plate 87 is provided with a heavy medium inlet 871 and a liquid inlet 872.

[0042] It should be noted that the liquid inlet 872 is used to deliver flocculant or clean water into the storage tank 81. The clean water can be supplied by an external water tank or water treated in an inclined tube sedimentation tank (not shown in the figure). Its function is to enable the heavy medium entering the storage tank 81 to mix with the flocculant or water to form a fluid with a certain flow capacity, so as to deliver it to the cavity 83 of the paddle 82 by the feeding mechanism 85.

[0043] In one embodiment of the invention, the storage tank 81 is connected to a second drive member 88 for driving it to move axially along the return cylinder 5;

[0044] In one embodiment of the present invention, the second driving member 88 is a cylinder, a hydraulic cylinder, or an electric telescopic rod. The piston rod of the cylinder, the piston rod of the hydraulic cylinder, or the telescopic rod of the electric telescopic rod is connected to the cover plate 87. The cylinder body of the cylinder, the cylinder body of the hydraulic cylinder, or the cylinder body of the electric telescopic rod is connected to the frame 100 at the top of the sedimentation tank.

[0045] In one embodiment of the present invention, the cover plate 87 is rotatably connected to the top of the storage tank 81, and the blade 82 is inclined so that the blade 82 and the storage tank 81 can be rotated when the water flows. It should be noted that a rotary seal can be provided at the rotary connection between the storage tank 81 and the cover plate 87 so that the storage tank 81 and the cover plate 87 are sealed during rotation.

[0046] In one embodiment of the present invention, a fixed shaft 873 is fixedly connected to the middle of the cover plate 87. The lower end of the fixed shaft 873 is rotatably connected to the bottom of the storage tank 81, and the upper end of the fixed shaft 873 is connected to the second driving member 88. By setting the fixed shaft 873, the storage tank 81 is more stable when it rotates.

[0047] In one embodiment of the present invention, the first driving member 86 includes four pulleys 861, each of which is rotatably connected to a first rotating shaft 862. The two ends of each first rotating shaft 862 are rotatably connected to the end of each piston head 856 away from the feeding chamber 851. A connecting rod 863 is rotatably connected to each of the first rotating shafts 862 located on both sides of the pulleys 861. The two connecting rods 863 are rotatably connected to two adjacent first rotating shafts 862. The first driving member 86 also includes a cam 864. The periphery of the cam 864 abuts against the periphery of the four pulleys 861. The cam 864 is fixedly mounted on the surface of the fixed shaft 873. When the cam 864 rotates relative to the four pulleys 861, it can drive two piston heads 856 in symmetrical positions to move closer or further away from each other.

[0048] By using a cam 864, the storage bin 81 rotates, and the four pulleys 861 rotate around the cam 864, as shown. Figure 5 and Figure 6 As shown, when the two piston heads 856 at one of the symmetrical positions move away from each other, the two piston heads 856 at the other symmetrical position move closer to each other. This process is repeated alternately as the storage tank 81 rotates, allowing the piston heads 856 to reciprocate within the feeding chamber 851. Figure 5As shown, when the piston head 856 moves, the first check valve 854 and the second check valve 855 cooperate to push the material in the storage tank 81 into the cavity 83 of the paddle 82. As the paddle 82 rotates, the material in the cavity 83 flows out of the discharge hole 84 under the action of centrifugal force and the flow of sewage. At this time, the material will have initial kinetic energy after it leaves the paddle 82. The heavy medium will be quickly dispersed in the return cylinder 5 and move upward with the water flow. After flowing to the outside of the return cylinder 5, it will mix with the external sewage.

[0049] It should be noted that components such as pulley 861 are all installed in the enclosed space at the bottom of the storage bin 81, such as... Figure 5 As shown, after the material enters the storage bin 81, it will fall to the bottom of the inner wall of the storage bin 81. When the storage bin 81 rotates, the material on it will move to the four first channels 852 under the action of centrifugal force.

[0050] In one embodiment of the present invention, the bottom of the inner wall of the storage tank 81 protrudes upward in a frustum shape, such as... Figure 5 As shown, it is used to guide the material falling to the bottom of the inner wall of the storage bucket 81 to the periphery, and further enable the material to move effectively to the four first channels 852.

[0051] In one embodiment of the present invention, a scraper 865 is provided inside the storage hopper 81, such as... Figure 5 As shown, one end of the scraper 865 is fixedly connected to the surface of the fixed shaft 873. As the storage tank 81 rotates, the scraper 865 rotates relative to the storage tank 81. The scraper 865 pushes the material to the periphery of the bottom of the inner wall of the storage tank 81, causing the material to move to the four first channels 852. This avoids the problem that materials with poor flowability or agglomerated materials have difficulty moving to the first channels 852, thus improving the feeding efficiency. Among them, materials with poor flowability, such as those with low flocculant or water content in the heavy medium, have relatively poor flowability and are difficult to move to the first channels 852 by centrifugal force or their own flowability when the feeding mechanism 85 is running. By setting the scraper 865, this problem can be effectively avoided. At the same time, the scraper 865 can prevent the formation of flocculent sediment at the bottom of the inner wall of the storage tank 81, which would affect the flow of the heavy medium.

[0052] In one embodiment of the present invention, a feeding mechanism 89 is also installed inside the storage hopper 81, such as... Figure 7 and Figure 8As shown, the feeding mechanism 89 includes a first gear 891 and a second gear 892. The first gear 891 is rotatably connected to the surface of the fixed shaft 873. The bottom of the first gear 891 is fixedly connected to the bottom of the inner wall of the storage bin 81. The second gear 892 is located above the first gear 891 and meshes with it. The second gear 892 is slidably connected to the surface of the fixed shaft 873. A rotating ring 893 is rotatably connected to the inner surface of the first gear 891. The rotating ring 893 is rotatably connected to the fixed shaft 873. A fixed part is installed on the top of the rotating ring 893. Spring 894, the other end of spring 894 is fixedly connected to the inner surface of the second gear 892. The tension of spring 894 acts on the first gear 891 and the second gear 892 to make them tend to move closer to each other. A feeding auger 895 is fixedly installed on the top of the second gear 892. The inner side of the feeding auger 895 is slidably connected to the surface of the fixed shaft 873, and the outer side of the feeding auger 895 is slidably connected to the inner wall of the storage tank 81. The material flows out from the lower end of the feeding auger 895. A material leakage hole 896 can also be opened on the bottommost auger layer to assist the feeding.

[0053] Through the feeding mechanism 89, when heavy media and liquids enter the storage tank 81, they first fall onto the feeding auger 895. When the storage tank 81 rotates, it drives the first gear 891 to rotate. Since the second gear 892 cannot rotate, the first gear 891 and the second gear 892 rotate in a misaligned manner, causing the second gear 892 to slide upwards and move downwards under the tension of the spring 894. When the first gear 891 rotates, the second gear 892 drives the feeding auger 895 above it to move up and down reciprocally. When the second gear 892 moves closer to the first gear 891, part of the kinetic energy generated by the collision is transferred to the feeding auger 895, causing the material on the feeding auger 895 to be vibrated and move along the auger. The auger conveys the material downwards. During the conveying process, the liquid flows relatively quickly, carrying away some of the un-clumped or un-agglomerated heavy media, allowing it to move rapidly to the bottom via the feeding auger 895. Meanwhile, the agglomerated or clumped heavy media will pass through the feeding auger 895 at a relatively slower speed. Under the vibration of the feeding auger 895, the agglomerated or clumped heavy media will disperse, so that the heavy media can enter the second equalization tank 3 evenly and dispersedly to carry out the flocculation process with the flocculant and sewage. This avoids the problem that agglomerated or clumped materials cannot be effectively separated after entering the second equalization tank 3, resulting in a low utilization rate of heavy media during the flocculation process. At the same time, it also affects the effective separation of heavy media during subsequent reuse, resulting in a low reuse rate of heavy media.

[0054] Commonly used heavy media include micro-sand or magnetic powder with suitable particle size. When micro-sand or magnetic powder is reused, it needs to be separated by a hydrocyclone 600 or magnetic separation equipment before being reintroduced into the second equalization tank 3. However, the separated heavy media often has moisture or some sludge residue on its surface, and some heavy media form clumps, affecting reuse. Magnetic powder will also generate weak magnetism for a certain period of time during use, causing some magnetic powder to clump together. The feeding mechanism 89 reduces the moving speed of the clumped or agglomerated heavy media by the feeding auger 895. The vibration of the feeding auger 895 disperses the clumped or agglomerated heavy media. When using magnetic powder as a heavy media, the vibration of the feeding auger 895 can also eliminate some of the magnetism of the magnetic powder, reduce its agglomerating force, facilitate its effective dispersion, and ensure the role of the heavy media in the sewage treatment process.

[0055] In one embodiment of the present invention, the storage tank 81 is moved by the second driving member 88 to move closer to or away from the stirring mechanism 6. When the storage tank 81 is close to the stirring mechanism 6, under the condition that the power of the stirring mechanism 6 is constant, the closer the storage tank 81 is to the stirring mechanism 6, the faster the water flow drives the storage tank 81 to rotate through the blade 82. Correspondingly, the speed at which the heavy medium is released outward is also faster. Thus, in the case of a relatively fast overall flow rate of sewage in the sewage treatment device, the release of heavy medium and flocculant is accelerated, thereby improving the treatment efficiency.

[0056] It should be noted that water still needs to be added to the liquid inlet 872 when no flocculant is being fed in, so that the heavy medium can be continuously released.

[0057] In one embodiment of the present invention, a method for treating underground mine wastewater is provided, specifically including the following steps:

[0058] S101. The wastewater settled in the pre-sedimentation tank 1 is transported to the first equalization tank 2, and coagulant is added to the first equalization tank 2 and stirred.

[0059] S102. Start the stirring mechanism 6 in the second regulating tank 3 to make the sewage flow back upward from the bottom of the return cylinder 5;

[0060] S103. The heavy medium and flocculant are released in the reflux cylinder 5 through the heavy medium release device 8.

[0061] S104. The flocs formed in the second equalization tank 3 will undergo final sedimentation after flowing into the purification sedimentation tank 4.

[0062] S105. Collect the sediment in the purification sedimentation tank 4 and transport it to the hydrocyclone 600 to separate the heavy medium.

[0063] S106. The separated heavy medium is then reintroduced into the second equalization tank 3.

[0064] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An underground mine wastewater treatment device, comprising a pre-sedimentation tank (1), a first equalization tank (2), a second equalization tank (3), and a purification sedimentation tank (4), characterized in that: The return cylinder (5) is set inside the second regulating tank (3). A stirring mechanism (6) is set inside the return cylinder (5). The stirring mechanism (6) is used to make the sewage flow upward from the bottom of the return cylinder (5). A guide plate (7) is also set inside the return cylinder (5). The guide plate (7) is located above the stirring mechanism (6). A heavy medium release device (8) is installed inside the reflux cylinder (5) and located between the stirring mechanism (6) and the guide plate (7). The heavy medium release device (8) includes a storage tank (81). Four blades (82) arranged in a circular array are fixedly installed on the bottom periphery of the storage tank (81). A cavity (83) is opened inside the blade (82). A discharge hole (84) communicating with the external space is opened on both sides of the blade (82) in the width direction. The bottom of the storage tank (81) is provided with four feeding mechanisms (85) corresponding to the four blades (82). The feeding mechanism (85) includes a feeding chamber (851) opened at the bottom of the storage tank (81) and a first channel (852) communicating with the inside of the storage tank (81) and the feeding chamber (851). The feeding mechanism (85) includes a first one-way valve (854) and a second one-way valve (855) connected to the feeding chamber (851) and the adjacent cavity (83); the first one-way valve (854) and the second one-way valve (855) are respectively installed in the first one-way valve (852) and the second one-way valve (855); a piston head (856) is slidably connected to the inner wall of the feeding chamber (851) away from the adjacent cavity (83); the feeding mechanism (85) also includes a first driving member (86) for driving each piston head (856) to reciprocate in each feeding chamber (851); when the piston head (856) moves, the first one-way valve (854) only allows the material in the storage tank (81) to flow to the feeding chamber (851), and the second one-way valve (855) only allows the material in the feeding chamber (851) to flow to the cavity (83); The first driving member (86) includes four pulleys (861), each pulley (861) is rotatably connected to a first rotating shaft (862) in the middle, and each first rotating shaft (862) is rotatably connected to the end of each piston head (856) away from the feeding chamber (851) at both ends. Each first rotating shaft (862) on both sides of the pulley (861) is rotatably connected to a connecting rod (863), and each connecting rod (863) is rotatably connected to two adjacent first rotating shafts (862). The first driving member (86) also includes a cam (864), the circumference of which abuts against the circumference of the four pulleys (861). The cam (864) is fixedly installed on the surface of a fixed shaft (873). When the cam (864) rotates relative to the four pulleys (861), it can drive two piston heads (856) in symmetrical positions to move closer or further away from each other. The top of the storage tank (81) is connected to a cover plate (87), and the top of the cover plate (87) is provided with a heavy medium inlet (871) and a liquid inlet (872).

2. The underground mine wastewater treatment device according to claim 1, characterized in that, The storage tank (81) is connected to a second drive unit (88) for driving it to move axially along the return cylinder (5).

3. The underground mine wastewater treatment device according to claim 2, characterized in that, The cover plate (87) is rotatably connected to the top of the storage tank (81), and the blade (82) is set at an angle.

4. The underground mine wastewater treatment device according to claim 3, characterized in that, A fixed shaft (873) is fixedly connected to the middle of the cover plate (87). The lower end of the fixed shaft (873) is rotatably connected to the bottom of the storage bucket (81), and the upper end of the fixed shaft (873) is connected to the second driving component (88).

5. The underground mine wastewater treatment device according to claim 4, characterized in that, The bottom of the inner wall of the storage hopper (81) protrudes upward in a frustum shape.

6. The underground mine wastewater treatment device according to claim 5, characterized in that, The storage bin (81) is equipped with a scraper (865), one end of which is fixedly connected to the surface of the fixed shaft (873).

7. The underground mine wastewater treatment device according to claim 6, characterized in that, The storage hopper (81) is also equipped with a feeding mechanism (89), which includes a first gear (891) and a second gear (892). The first gear (891) is rotatably connected to the surface of a fixed shaft (873), and the bottom of the first gear (891) is fixedly connected to the bottom of the inner wall of the storage hopper (81). The second gear (892) is located above the first gear (891) and meshes with it. The fixed shaft (873) is slidably connected to the surface, and the inner surface of the first gear (891) is rotatably connected to the rotating ring (893). The rotating ring (893) is rotatably connected to the fixed shaft (873). A spring (894) is fixedly installed on the top of the rotating ring (893). The other end of the spring (894) is fixedly connected to the inner surface of the second gear (892). The tension of the spring (894) acts on the first gear (891) and the second gear (892) to make them tend to move closer to each other.

8. The underground mine wastewater treatment device according to claim 7, characterized in that, The top of the second gear (892) is fixedly installed with a feeding auger (895). The inner side of the feeding auger (895) is slidably connected to the surface of the fixed shaft (873), and the outer side of the feeding auger (895) is slidably connected to the inner wall of the storage bucket (81).

9. A method for treating underground mine wastewater, applicable to the underground mine wastewater treatment device as described in any one of claims 1-8, characterized in that, Specifically, the following steps are included: S101. The wastewater after sedimentation in the pre-sedimentation tank (1) is transported to the first equalization tank (2), and coagulant is added to the first equalization tank (2) and stirred. S102. Start the stirring mechanism (6) in the second regulating tank (3) to make the sewage flow back from the bottom of the return cylinder (5) upwards; S103. The heavy medium and flocculant are released in the reflux cylinder (5) through the heavy medium release device (8).

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