Mine wastewater nitrogen and phosphorus removal device and treatment method thereof

Abstract

The invention relates to the technical field of mine wastewater treatment, in particular to a mine wastewater nitrogen and phosphorus removal device and a treatment method thereof.The mine wastewater nitrogen and phosphorus removal device comprises a reaction cylinder, a stirring mechanism, a collecting mechanism and a reaction tank, the collecting mechanism comprises a collecting box and a conical disc, an opening is formed in the inner side wall of the reaction cylinder, and a first filter screen is arranged at the bottom of the opening; the collecting box is communicated with the opening and the first filter screen, the conical disc is arranged in the reaction cylinder, the opening is located in one side of the bottom of the conical disc, and a plurality of water leakage holes are formed in the conical disc; an annular groove is formed in the bottom of the reaction cylinder, a communicating pipe is arranged on the side wall of the annular groove and communicates with the reaction tank, and a second filter screen is arranged on the side, facing the reaction cylinder, of the communicating pipe; a conical groove is formed in the bottom of the annular groove, and a discharging opening is formed in the bottom of the conical groove. According to the invention, large impurities are primarily separated, and sediments are accommodated in the annular groove, so that the sediments are conveniently discharged from the discharge port, and the blockage phenomenon when wastewater flows to the treatment tank is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mine wastewater treatment, in particular to a mine wastewater denitrification and dephosphorization device and a treatment method thereof. Background Art

[0002] In the field of mine wastewater treatment, a long-standing technical problem is how to efficiently and economically remove pollutants such as nitrogen and phosphorus, as well as suspended matter and large particle impurities in wastewater. Due to its special source and composition, mine wastewater often contains high concentrations of suspended matter, sediment, heavy metal ions, and nutrients such as nitrogen and phosphorus. If these pollutants are discharged directly without treatment, they will cause serious pollution to the environment, especially the damage to the aquatic ecosystem.

[0003] The traditional method of treating mine wastewater is to add coagulants and flocculants to the wastewater to make the suspended matter, colloidal substances, etc. in the wastewater form larger flocs and settle them. The wastewater is then passed into a biological filter to use the oxidative decomposition of microorganisms to remove organic matter and some nitrogen in the wastewater. At the same time, the metabolic activities of microorganisms can remove phosphorus.

[0004] However, due to the presence of large impurities in mine wastewater, blockage is prone to occur when the wastewater flows into the biological filter. In addition, due to the large amount of sediment in the wastewater, it is easy to deposit at the bottom of pipes, filters and other equipment during the wastewater treatment process, making it difficult to clean. Summary of the invention

[0005] The purpose of the present application is to provide a mine wastewater denitrification and phosphorus removal device and a treatment method thereof. By setting a conical disk, larger impurity pollutants in the mine wastewater can be guided to flow into a collecting box for preliminary separation. The wastewater flowing into the collecting box is filtered through a first filter screen and then flows back into the reaction cylinder. The sediment in the water is isolated by a second filter screen. The annular groove is used to accommodate the sediment. At the same time, the conical groove design at the bottom of the annular groove facilitates the discharge of the sediment from the discharge port, thereby avoiding blockage of the wastewater when it flows to the treatment pool.

[0006] To achieve the above-mentioned purpose, the present application provides a mine wastewater denitrification and dephosphorization device, including a reaction cylinder, a stirring mechanism, a collecting mechanism and a reaction tank, wherein a liquid inlet is arranged on the top of the reaction cylinder, and the stirring mechanism stirs the inside of the reaction cylinder; a feed pipe is arranged on the side wall of the reaction cylinder; the collecting mechanism includes a collecting box and a conical disk, an opening is arranged on the inner wall of the reaction cylinder, a first filter screen is arranged at the bottom of the opening, the collecting box is fixedly arranged on the outer wall of the reaction cylinder and is connected with the opening and the first filter screen, the conical disk is arranged inside the reaction cylinder, and the opening is located on one side of the bottom of the conical disk, and a plurality of water leakage holes are arranged on the conical disk; an annular groove is arranged at the bottom of the reaction cylinder, a connecting pipe is arranged on the side wall of the annular groove, the connecting pipe is connected with the reaction tank, and a second filter screen is arranged on the side of the connecting pipe facing the reaction cylinder; a conical groove is arranged at the bottom of the annular groove, and a discharge port is arranged at the bottom of the conical groove.

[0007] As a further solution of the present invention: the stirring mechanism includes a motor, a rotating shaft and a stirring rod, the motor is arranged at the top of the reaction tube, the output end of the motor passes through the top of the reaction tube and is connected to the rotating shaft, a plurality of stirring rods are arranged on the rotating shaft, and the stirring rod at the bottom of the rotating shaft is connected to the bottom of the reaction tube.

[0008] As a further solution of the present invention: a plurality of the side walls of the stirring rods are provided with connecting plates, a conical block is provided at the bottom of the connecting plate, the conical block is rotatably matched with the conical groove, and a plurality of bristles are provided on the connecting plate and the side walls of the conical block.

[0009] As a further solution of the present invention: the bristles are connected to the inner wall of the reaction cylinder and clean the first filter screen and the second filter screen.

[0010] As a further solution of the present invention: a rotating block is arranged on the rotating shaft, connecting rods are arranged on both sides of the rotating block, a scraper is arranged at the bottom of the connecting rod, and the bottom of the scraper is connected to the conical surface of the conical disk.

[0011] As a further solution of the present invention: the outer side wall of the collection box is provided with a hinged door, and the hinged door is provided with an observation window.

[0012] As a further solution of the present invention: an inclined plate is arranged inside the collection box, and one side of the bottom of the inclined plate faces the first filter screen.

[0013] A treatment method for a mine wastewater denitrification and dephosphorization device comprises the following steps: the mine wastewater enters a reaction cylinder through a liquid inlet, a conical disk causes larger impurities in the wastewater to flow into a collection box, and the wastewater enters the reaction cylinder after being filtered through a water leakage hole and a first filter screen; a flocculant is added to a feed pipe, a motor is started, a rotating shaft is driven to rotate, and a stirring rod is driven to stir the wastewater, so that suspended matter, colloidal substances and the like in the wastewater form larger floccules and settle to the bottom of the reaction cylinder; after the wastewater is filtered through a second filter screen, it flows into a reaction tank through a connecting pipe; and the precipitate is discharged through a discharge port; and an appropriate amount of a denitrification and dephosphorization agent is added to the reaction tank to remove pollutants such as nitrogen and phosphorus in the wastewater.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention can guide larger impurities and pollutants in mine wastewater to flow into the collection box for preliminary separation by arranging a conical disk. The wastewater flowing into the collection box is filtered by the first filter screen and then flows back into the reaction cylinder. The sediment in the water is isolated by the second filter screen. The annular groove is used to accommodate the sediment. At the same time, the conical groove design at the bottom of the annular groove facilitates the discharge of the sediment from the discharge port.

[0016] 2. The present invention drives the stirring rod to stir the wastewater in the reaction cylinder by driving the rotating shaft to rotate through the motor. After the flocculant is added into the feed pipe, the stirring rod can fully contact and combine the pollutants in the wastewater with the flocculant, which is conducive to forming a larger flocculent body and accelerating its sedimentation. The stirring rod at the bottom of the shaft is connected to the bottom of the reaction cylinder, which can effectively prevent the sedimentation and agglomeration of the bottom sediment, so that the sediment falls into the annular groove for easy discharge.

[0017] 3. When the motor drives the rotating shaft and the stirring rod to rotate, the connecting plate, the conical block and the bristles rotate accordingly. The bristles not only closely contact the inner wall of the reaction cylinder, constantly scraping and removing the dirt attached thereon, but also automatically clean the first filter screen and the second filter screen along the rotation trajectory of the stirring rod. This cleaning action is continuous and uniform, which can effectively prevent the first filter screen and the second filter screen from being blocked, and maintain the smooth flow and efficient treatment of wastewater; at the same time, the conical block is rotatably set in the conical groove, which can guide the sediment in the conical groove to the discharge port, avoid the sediment from accumulating in the conical groove, and improve the cleaning efficiency.

[0018] 4. The present invention provides a hinged door, which is convenient for opening to clean the impurities inside the collection box. At the same time, by observing the window glass material, the situation inside the collection box, such as the progress of wastewater treatment, the accumulation of sediments, etc., can be observed intuitively; the inclined plate in the collection box can guide the wastewater in the collection box to flow into the reaction cylinder, thereby improving the wastewater treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a mine wastewater denitrification and phosphorus removal device.

[0021] Figure 2 This is a cross-sectional view of the interior of the reaction tube.

[0022] Figure 3 Schematic diagram of the internal structure of the reaction tube.

[0023] Figure 4 Schematic diagram of the three-dimensional structure for installing the second filter.

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the collection box.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting plate and the conical block.

[0026] The reference numerals in the figure are: 1. reaction cylinder; 11. liquid inlet; 12. feed pipe; 13. opening; 14. first filter screen; 15. annular groove; 16. conical groove; 17. second filter screen; 18. discharge port; 2. collecting box; 21. hinged door; 22. observation window; 23. inclined plate; 3. conical disk; 31. leakage hole; 4. motor; 41. rotating shaft; 42. stirring rod; 5. connecting plate; 51. conical block; 52. bristles; 6. rotating block; 61. connecting rod; 62. scraper; 7. connecting pipe; 71. reaction tank. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] like Figures 1 to 6 As shown, a mine wastewater denitrification and dephosphorization device includes a reaction tube 1, a stirring mechanism, a collecting mechanism and a reaction pool 71. The top of the reaction tube 1 is provided with a liquid inlet 11, and wastewater enters the reaction tube 1 through the liquid inlet 11. The stirring mechanism stirs the inside of the reaction tube 1.

[0029] A feed pipe 12 is provided on the side wall of the reaction cylinder 1; the collecting mechanism includes a collecting box 2 and a conical disk 3, an opening 13 is provided on the inner side wall of the reaction cylinder 1, a first filter screen 14 is provided at the bottom of the opening 13, the collecting box 2 is fixedly arranged on the outer side wall of the reaction cylinder 1, and is communicated with the opening 13 and the first filter screen 14, the conical disk 3 is arranged inside the reaction cylinder 1, and the opening 13 is located at one side of the bottom of the conical disk 3, and a plurality of water leakage holes 31 are provided on the conical disk 3; an annular groove 15 is provided at the bottom of the reaction cylinder 1, a connecting pipe 7 is provided on the side wall of the annular groove 15, the connecting pipe 7 is communicated with the reaction pool 71, and a second filter screen 17 is provided on the side of the connecting pipe 7 facing the reaction cylinder 1; a conical groove 16 is provided at the bottom of the annular groove 15, and a discharge port 18 is provided at the bottom of the conical groove 16.

[0030] By setting up the conical disk 3, larger impurities and pollutants in the mine wastewater can be guided to flow into the collection box 2 for preliminary separation. The wastewater flowing into the collection box 2 is filtered by the first filter screen 14 and then flows back into the reaction tube 1. The sediment in the water is isolated by the second filter screen 17. The annular groove 15 is used to accommodate the sediment. At the same time, the conical groove 16 at the bottom of the annular groove 15 is designed to facilitate the discharge of the sediment from the discharge port 18.

[0031] The stirring mechanism includes a motor 4, a rotating shaft 41 and a stirring rod 42. The motor 4 is arranged at the top of the reaction tube 1, and the output end of the motor 4 passes through the top of the reaction tube 1 and is connected to the rotating shaft 41. A plurality of stirring rods 42 are arranged on the rotating shaft 41, wherein the stirring rod 42 at the bottom of the rotating shaft 41 is connected to the bottom of the reaction tube 1.

[0032] The motor 4 drives the rotating shaft 41 to rotate and drive the stirring rod 42 to stir the wastewater in the reaction cylinder 1. After the flocculant is added into the feeding pipe 12, the stirring rod 42 can fully contact and combine the pollutants in the wastewater with the flocculant, which is conducive to forming a larger floc and accelerating its sedimentation. The stirring rod 42 at the bottom of the shaft is connected to the bottom of the reaction cylinder 1, which can effectively prevent the sedimentation and agglomeration of the bottom sediment, so that the sediment falls into the annular groove 15 for easy discharge.

[0033] A connecting plate 5 is provided on the side walls of the stirring rods 42, a conical block 51 is provided at the bottom of the connecting plate 5, the conical block 51 is rotatably matched with the conical groove 16, and a plurality of bristles 52 are provided on the side walls of the connecting plate 5 and the conical block 51. The bristles 52 are connected to the inner wall of the reaction cylinder 1 and clean the first filter screen 14 and the second filter screen 17.

[0034] When the motor 4 drives the rotating shaft 41 and the stirring rod 42 to rotate, the connecting plate 5, the conical block 51 and the bristles 52 rotate accordingly. The bristles 52 not only closely contact the inner wall of the reaction tube 1, constantly scraping and removing the dirt attached thereon, but also automatically clean the first filter screen 14 and the second filter screen 17 along the rotation trajectory of the stirring rod 42. This cleaning action is continuous and uniform, which can effectively prevent the first filter screen 14 and the second filter screen 17 from being blocked, and maintain the smooth flow and efficient treatment of wastewater; at the same time, the conical block 51 is rotatably set in the conical groove 16, which can guide the sediment in the conical groove 16 to the discharge port 18 to avoid the sediment from accumulating in the conical groove 16, thereby improving the cleaning efficiency.

[0035] A rotating block 6 is disposed on the rotating shaft 41 , connecting rods 61 are disposed on both sides of the rotating block 6 , a scraper 62 is disposed at the bottom of the connecting rod 61 , and the bottom of the scraper 62 is connected to the conical surface of the conical disk 3 .

[0036] By arranging the rotating block 6 to drive the scraper 62 to scrape along the surface of the conical disk 3, the adhesion of impurities on the conical disk 3 can be reduced, and the clogging of the leakage hole 31 can be avoided.

[0037] The outer wall of the collection box 2 is provided with a hinged door 21 , and the hinged door 21 is provided with an observation window 22 ; an inclined plate 23 is provided inside the collection box 2 , and one side of the bottom of the inclined plate 23 faces the first filter screen 14 .

[0038] By setting a hinged door 21, it is convenient to open and clean the impurities inside the collection box 2. At the same time, the glass material of the observation window 22 can intuitively observe the situation inside the collection box 2, such as the progress of wastewater treatment, the accumulation of sediment, etc.; the inclined plate 23 in the collection box 2 can guide the wastewater in the collection box 2 to flow into the reaction cylinder 1, thereby improving the wastewater treatment efficiency.

[0039] The present invention also provides a treatment method for a mine wastewater denitrification and dephosphorization device, comprising the following steps: the mine wastewater enters the reaction tube 1 through the liquid inlet 11, the conical disk 3 flows the larger impurities in the wastewater into the collection box 2, and the wastewater enters the reaction tube 1 after being filtered through the leakage hole 31 and the first filter screen 14; a flocculant is added to the feed pipe 12, the motor 4 is started, the rotating shaft 41 is driven to rotate, and the stirring rod 42 is driven to stir the wastewater, so that the suspended matter, colloidal substances, etc. in the wastewater form larger floccules and settle to the bottom of the reaction tube 1; after the wastewater is filtered through the second filter screen 17, it flows into the reaction tank 71 through the connecting pipe 7; the precipitate is discharged through the discharge port 18; an appropriate amount of denitrification and dephosphorization agent is added to the reaction tank 71 to remove pollutants such as nitrogen and phosphorus in the wastewater.

[0040] The working principle of the present invention is as follows: the mine wastewater first enters the reaction cylinder 1 through the liquid inlet 11, and the larger impurities are intercepted by the conical disk 3 and guided to flow into the collection box 2 to achieve preliminary separation. Subsequently, the wastewater is further filtered through the leaking hole 31 on the conical disk 3 and the first filter screen 14, and flows back to the reaction cylinder 1 after removing some suspended matter. At this time, a flocculant is added to the feed pipe 12, the motor 4 of the stirring mechanism is started, the drive shaft 41 drives the stirring rod 42 to rotate, the wastewater is fully stirred, the suspended matter, the colloidal substance and the flocculant are combined to form a larger flocculent body, and the sedimentation to the bottom of the reaction cylinder 1 is accelerated. After the wastewater is filtered by the second filter screen 17, it flows into the reaction tank 71 through the connecting pipe 7. In the reaction tank 71, by adding an appropriate amount of denitrification and dephosphorization agent, pollutants such as nitrogen and phosphorus in the wastewater are further removed. At the same time, the sediment at the bottom of the reaction cylinder 1 is conveniently discharged from the discharge port 18 through the design of the conical groove 16, thereby realizing continuous treatment and purification of the wastewater.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mine wastewater denitrification and dephosphorization device, comprising a reaction tube (1), a stirring mechanism, a collecting mechanism and a reaction pool (71), wherein the top of the reaction tube (1) is provided with a liquid inlet (11), and the stirring mechanism stirs the interior of the reaction tube (1); and the side wall of the reaction tube (1) is provided with a feed pipe (12); It is characterized in that The collecting mechanism comprises a collecting box (2) and a conical disk (3); an opening (13) is provided on the inner wall of the reaction cylinder (1); a first filter screen (14) is provided at the bottom of the opening (13); the collecting box (2) is fixedly arranged on the outer wall of the reaction cylinder (1) and is in communication with the opening (13) and the first filter screen (14); the conical disk (3) is arranged inside the reaction cylinder (1), and the opening (13) is located at one side of the bottom of the conical disk (3); and a plurality of water leakage holes (31) are provided on the conical disk (3); The bottom of the reaction cylinder (1) is provided with an annular groove (15), the side wall of the annular groove (15) is provided with a connecting pipe (7), the connecting pipe (7) is connected to the reaction pool (71), and a second filter screen (17) is provided on the side of the connecting pipe (7) facing the reaction cylinder (1); the bottom of the annular groove (15) is provided with a conical groove (16), and the bottom of the conical groove (16) is provided with a discharge port (18).

2. A mine wastewater denitrification and dephosphorization device according to claim 1, It is characterized in that The stirring mechanism comprises a motor (4), a rotating shaft (41) and a stirring rod (42); the motor (4) is arranged at the top of the reaction cylinder (1); the output end of the motor (4) passes through the top of the reaction cylinder (1) and is connected to the rotating shaft (41); a plurality of stirring rods (42) are arranged on the rotating shaft (41), wherein the stirring rod (42) at the bottom of the rotating shaft (41) is connected to the bottom of the reaction cylinder (1).

3. A mine wastewater denitrification and dephosphorization device according to claim 2, It is characterized in that A plurality of the stirring rods (42) are provided with connecting plates (5) on their side walls, a conical block (51) is provided at the bottom of the connecting plates (5), the conical block (51) is rotatably matched with the conical groove (16), and a plurality of bristles (52) are provided on the connecting plates (5) and the conical block (51) side walls.

4. A mine wastewater denitrification and dephosphorization device according to claim 3, It is characterized in that The bristles (52) are connected to the inner wall of the reaction cylinder (1) and clean the first filter screen (14) and the second filter screen (17).

5. A mine wastewater denitrification and dephosphorization device according to claim 2, It is characterized in that A rotating block (6) is arranged on the rotating shaft (41), connecting rods (61) are arranged on both sides of the rotating block (6), a scraper (62) is arranged at the bottom of the connecting rod (61), and the bottom of the scraper (62) is connected to the conical surface of the conical disk (3).

6. A mine wastewater denitrification and dephosphorization device according to claim 1, It is characterized in that The outer side wall of the collection box (2) is provided with a hinged door (21), and the hinged door (21) is provided with an observation window (22).

7. A mine wastewater denitrification and dephosphorization device according to claim 1, It is characterized in that An inclined plate (23) is provided inside the collection box (2), and one side of the bottom of the inclined plate (23) faces the first filter screen (14).

8. A method for treating a mine wastewater denitrification and dephosphorization device according to any one of claims 1 to 7, It is characterized in that The following steps are included: S1: Mine wastewater enters the reaction tube (1) through the liquid inlet (11), the conical disk (3) removes larger impurities in the wastewater and flows into the collection box (2), and the wastewater is filtered through the water leakage hole (31) and the first filter screen (14) before entering the interior of the reaction tube (1); S2: Adding flocculant into the feed pipe (12), starting the motor (4), driving the rotating shaft (41) to rotate, driving the stirring rod (42) to stir the wastewater, so that the suspended matter, colloidal substances, etc. in the wastewater form larger flocs and settle to the bottom of the reaction tube (1); S3: After being filtered by the second filter screen (17), the wastewater flows into the reaction tank (71) through the connecting pipe (7); the precipitate is discharged through the discharge port (18); S4: Adding an appropriate amount of denitrification and dephosphorization agent into the reaction tank (71) to remove pollutants such as nitrogen and phosphorus in the wastewater.

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