Sewage purification tank for coal mining

Abstract

The utility model discloses a sewage purification tank for coal mining, which comprises a wastewater tank and a purification tank, is used for preliminarily purifying sewage generated during coal mining, and further comprises a first filter screen mounted in the purification tank, a second filter screen mounted above the first filter screen, a movable plate mounted above the second filter screen, and a water tank mounted above the movable plate, a plurality of dredging needles are evenly fixed to the lower end of the movable plate, and a lead screw and a limiting rod are installed on the two sides of the second filter screen correspondingly. According to the sewage purification tank for coal mining, provided by the utility model, after the water pump is started and sewage is conveyed into the purification tank from the wastewater tank through the conveying pipe, the movable plate and the second filter screen simultaneously ascend and descend and are far away from each other through the rotation of the screw rod, and after the second filter screen descends to the position close to the first filter screen as much as possible, the movable plate and the second filter screen are separated; floccules are filtered twice through a second filter screen and a first filter screen, and at the moment, after a valve in a discharge pipe is opened, preliminarily purified sewage is discharged through the discharge pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and particularly relates to a sewage purification tank for coal mine exploitation. Background Art

[0002] Coal is an important part of China's energy structure and occupies a relatively large proportion. Coal plays a "ballast" role in ensuring energy security and supporting the development of the national economy.

[0003] During the process of coal mine exploitation, raw coal usually needs to be washed to remove impurities in the coal, such as soil, stones, sulfur and other substances. This washing process will generate a large amount of wastewater, which contains suspended solids, heavy metals and other pollutants. Untreated coal mine sewage may affect human health through the food chain, so it is crucial to purify the sewage before discharging it.

[0004] In the primary stage of purifying the sewage generated during coal mine exploitation, most of the pollutants in the sewage need to be filtered first. In the prior art, usually after adding medicine to the sewage and waiting for the pollutants to turn into flocculates, the filtration is carried out by the sedimentation method. Then the sedimentation method requires a certain amount of time to wait, resulting in low purification efficiency. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a sewage purification tank for coal mine exploitation, aiming to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A sewage purification tank for coal mine exploitation, including a wastewater tank and a purification tank, which is used for preliminarily purifying the sewage generated during coal mine exploitation, and further includes:

[0008] A first filter screen is installed inside the purification tank, a second filter screen is installed above the first filter screen, a movable plate is installed above the second filter screen, a plurality of dredging needles are evenly fixed at the lower end of the movable plate, screw rods and limiting rods are respectively installed on both sides of the second filter screen, a discharge pipe is installed on one side of the outer end of the purification tank, a wastewater pipe is installed on the other side of the outer end of the purification tank, and a conveying rod is rotatably connected inside the wastewater pipe.

[0009] Preferably, a water pump is installed at the outer end of the wastewater tank, the water outlet end of the water pump is connected with a conveying pipe, the other end of the conveying pipe is connected to the inside of the purification tank, the water inlet end of the water pump is connected with a water pipe, and the water pipe extends into the inside of the wastewater tank.

[0010] Preferably, the first filter screen is fixed to the inner wall of the purification tank through a first fixing frame on its outer side. The mesh aperture of the first filter screen is larger than that of the second filter screen. When the second filter screen is in use, the water inlet of the discharge pipe is located above the second filter screen.

[0011] Preferably, the lead screw is threadedly connected to one end of the second mounting frame. The outer end of the lead screw is rotatably connected to the purification tank and the first fixing frame respectively. A first motor is installed on the top of the purification tank, and the output shaft of the first motor is connected to the lead screw. The thread directions on the two outer surfaces of the lead screw connected to the movable plate and the second mounting frame are opposite;

[0012] The limiting rods are fixed to the purification tank and the first fixing frame respectively, and the limiting rods penetrate through the inside of the second mounting frame.

[0013] Preferably, the conveying rod further includes a driving rod and a spiral blade. One end of the driving rod is rotatably connected to the inside of the waste water pipe, and the other end is rotatably connected to the inside of the purification tank. The spiral blade is of a spiral structure and is fixed to the outer end of the driving rod. A second motor is installed at the outer end of the waste water pipe, and the output shaft of the second motor is connected to the driving rod.

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

[0015] For a sewage purification tank for coal mine exploitation provided by the present utility model, after starting the water pump to transport sewage from the waste water tank to the inside of the purification tank through the delivery pipe, through the rotation of the lead screw, at this time the movable plate and the second filter screen are lifted and lowered simultaneously and move away from each other. After the second filter screen descends to a position as close as possible to the first filter screen, the flocculants are filtered twice by the second filter screen and the first filter screen. At this time, after opening the valve in the discharge pipe, the preliminarily purified sewage is discharged through the discharge pipe, without waiting for the precipitation of the flocculants, improving the purification efficiency;

[0016] After the preliminary purification of the sewage is completed, through the reverse rotation of the lead screw, the second filter screen and the movable plate are lifted and lowered and move closer to each other, so that the dredging needle can be inserted into the mesh of the second filter screen to dredge the mesh of the second filter screen;

[0017] When it is necessary to discharge the mixed liquid with a large amount of flocculants, through the rotation of the conveying rod, the mixed liquid with a large amount of flocculants is conveyed under the rotation of the spiral blade. The conveying rod provides power for the conveyance of the mixed liquid, preventing the flocculants from causing blockage in the waste water pipe and being difficult to discharge. Then, after opening the valve in the waste water pipe, the mixed liquid can be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 This is a schematic side view structure of the utility model;

[0020] Figure 3 This is a schematic front sectional structure of the purification tank of the utility model;

[0021] Figure 4 This is the utility model Figure 3 The enlarged structure schematic diagram at position A in it.

[0022] In the figure: 1. Wastewater tank; 11. Water pump; 12. Delivery pipe; 2. Purification tank; 21. Base; 3. Discharge pipe; 4. Wastewater pipe; 5. Delivery rod; 51. Driving rod; 52. Spiral blade; 53. Second motor; 6. First filter screen; 61. First fixing frame; 7. Second filter screen; 71. Second installation frame; 8. Movable plate; 81. Cleaning needle; 9. Lead screw; 91. First motor. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0024] A sewage purification tank for coal mine mining includes a wastewater tank 1 and a purification tank 2. The sewage generated during coal mine mining that needs to be purified is discharged into the wastewater tank 1. A water pump 11 is installed at the outer end of the wastewater tank 1. The water outlet end of the water pump 11 is connected to a delivery pipe 12, and the other end of the delivery pipe 12 is connected to the inside of the purification tank 2. Moreover, the water inlet end of the water pump 11 is connected to a water pipe, and the water pipe extends into the inside of the wastewater tank 1. After starting the water pump 11, the sewage in the wastewater tank 1 can be pumped through the water pipe, and the sewage is transported to the inside of the purification tank 2 through the delivery pipe 12. A base 21 is fixed at the bottom of the purification tank 2, and the overall purification tank 2 is supported by the base 21.

[0025] In this factual example, as Figure 1 , Figure 2 and Figure 3 , a first filter screen 6 is installed inside the purification tank 2. The first filter screen 6 is used to intercept the flocs in the sewage for the first time. A second filter screen 7 is installed above the first filter screen 6. The second filter screen 7 can intercept the flocs in the sewage for the second time, improving the filtering effect on the flocs in the sewage. A discharge pipe 3 is installed on one side of the outer end of the purification tank 2. A valve is provided inside the discharge pipe 3, and the preliminarily purified sewage can be discharged through the discharge pipe 3.

[0026] Specifically, the first filter screen 6 is fixed to the inner wall of the purification tank 2 through the first fixing frame 61 on its outer side, and the mesh aperture of the first filter screen 6 is larger than that of the second filter screen 7, so as to intercept the larger flocs in the sewage through the first filter screen 6, and the second filter screen 7 intercepts the smaller flocs in the sewage, avoiding the problem of more prone blockage when intercepting flocs uniformly. On both sides of the second filter screen 7, a lead screw 9 and a limiting rod are installed respectively, and the second filter screen 7 can be driven to lift through the lead screw 9.

[0027] One end of the lead screw 9 is threadedly connected to the second installation frame 71, and the outer ends of the lead screw 9 are respectively rotationally connected to the purification tank 2 and the first fixing frame 61. When the lead screw 9 rotates, the second filter screen 7 can be driven to lift through the second installation frame 71. A first motor 91 is installed at the top of the purification tank 2, and the output shaft of the first motor 91 is connected to the lead screw 9. The specific connection method can adopt the existing technology. Starting the first motor 91 can drive the lead screw 9 to rotate. At the same time, the limiting rod is respectively fixed to the purification tank 2 and the first fixing frame 61, and the limiting rod passes through the inside of the second installation frame 71 to maintain the stability of the second installation frame 71 during lifting. Moreover, when the second filter screen 7 intercepts the smaller flocs in the sewage, the second filter screen 7 is in use. At this time, the water inlet of the discharge pipe 3 is located above the second filter screen 7, so as to discharge the preliminarily purified sewage through the discharge pipe 3 after opening the valve in the discharge pipe 3.

[0028] Furthermore, a movable plate 8 is installed above the second filter screen 7. A plurality of dredging needles 81 are uniformly fixed to the lower end of the movable plate 8. When the movable plate 8 drives the dredging needles 81 to descend, the dredging needles 81 can be inserted into the meshes of the second filter screen 7 to dredge the meshes of the second filter screen 7 and avoid blockage of the meshes of the second filter screen 7. The lead screw 9 is also threadedly connected to one end of the movable plate 8. At the same time, the limiting rod passes through the other end of the movable plate 8. The rotation of the lead screw 9 can drive the movable plate 8 to lift. Moreover, the thread directions of the outer surfaces of the two sides where the lead screw 9 is connected to the movable plate 8 and the second installation frame 71 are opposite, so that the second filter screen 7 and the movable plate 8 move away from each other when the lead screw 9 rotates. On the contrary, when the lead screw 9 rotates in reverse, the movable plate 8 and the second installation frame 71 approach each other.

[0029] The mesh of the first filter screen 6 belongs to a large-aperture mesh relative to the second filter screen 7 and is not easily blocked, so there is no need to dredge it.

[0030] In a further embodiment, such as Figure 1 、 Figure 3 and Figure 4, a waste water pipe 4 is installed on the other side of the outer end of the purification tank 2. The mixed liquid with a large amount of flocculants can be discharged through the waste water pipe 4. A conveying rod 5 is rotatably connected inside the waste water pipe 4. The mixed liquid with a large amount of flocculants can be conveyed through the conveying rod 5 and discharged through the waste water pipe 4. The conveying rod 5 includes a driving rod 51 and a spiral blade 52. One end of the driving rod 51 is rotatably connected inside the waste water pipe 4, and the other end is rotatably connected inside the purification tank 2. The spiral blade 52 is of a spiral structure and is fixed to the outer end of the driving rod 51. A second motor 53 is installed at the outer end of the waste water pipe 4. The output shaft of the second motor 53 is connected to the driving rod 51, and can drive the driving rod 51 to rotate after starting the second motor 53. A valve is installed inside the waste water pipe 4. Open the valve of the waste water pipe 4 to discharge the mixed liquid. After the mixed liquid with a large amount of flocculants is conveyed by the spiral blade 52.

[0031] After discharging the sewage generated after coal mining into the waste water tank 1, add medicine to the waste water tank 1 so that the medicine reacts chemically with the pollutants inside the waste water tank 1 to convert the pollutants into flocculants. The medicine used can be the medicine in the existing technology, so it will not be elaborated here. After the conversion is completed, start the water pump 11 to pump the sewage in the waste water tank 1 through the water pipe. After the sewage is conveyed to the inside of the purification tank 2 through the conveying pipe 12, start the first motor 91 to drive the lead screw 9 to rotate. At this time, the movable plate 8 and the second filter screen 7 are lifted and separated from each other at the same time. After the second filter screen 7 descends to a position as close as possible to the first filter screen 6, the flocculants are filtered twice by the second filter screen 7 and the first filter screen 6. At this time, open the valve in the discharge pipe 3 and discharge the preliminarily purified sewage through the discharge pipe 3, so that there is no need to wait for the precipitation of the flocculants, and the purification efficiency is improved.

[0032] After the preliminary purification of the sewage is completed, start the first motor 91 to drive the lead screw 9 to reverse. At this time, the second filter screen 7 and the movable plate 8 are lifted and close to each other, so that the dredging needle 81 can be inserted into the mesh holes of the second filter screen 7 to dredge the mesh holes of the second filter screen 7.

[0033] When it is necessary to discharge the mixed liquid with a large amount of flocculants, start the second motor 53 to drive the whole conveying rod 5 to rotate. The rotation of the spiral blade 52 drives the mixed liquid with a large amount of flocculants to be conveyed. The conveying rod 5 provides power for the conveyance of the mixed liquid, avoiding the blockage of the flocculants in the waste water pipe 4 and making it difficult to discharge. Then open the valve in the waste water pipe 4 and the mixed liquid can be discharged.

[0034] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0035] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A wastewater purification tank for coal mining, comprising a wastewater tank (1) and a purification tank (2), for preliminary purification of wastewater generated during coal mining, characterized in that: Also includes: A first filter screen (6) is installed inside the purification tank (2), a second filter screen (7) is installed above the first filter screen (6), a movable plate (8) is installed above the second filter screen (7), a plurality of dredging needles (81) are evenly fixed at the lower end of the movable plate (8), a screw rod (9) and a limit rod are installed on both sides of the second filter screen (7), a discharge pipe (3) is installed on one side of the outer end of the purification tank (2), a waste water pipe (4) is installed on the other side of the outer end of the purification tank (2), and a conveying rod (5) is rotatably connected to the inside of the waste water pipe (4).

2. A coal mine wastewater purification tank according to claim 1, characterized in that: A water pump (11) is installed at the outer end of the wastewater pool (1), the water outlet end of the water pump (11) is connected to a delivery pipe (12), the other end of the delivery pipe (12) is connected to the interior of the purification pool (2), and the water inlet end of the water pump (11) is connected to a water pipe, and the water pipe extends to the interior of the wastewater pool (1).

3. A coal mine wastewater purification tank according to claim 1, characterized in that: The first filter screen (6) is fixed to the inner wall of the purification tank (2) via a first fixing frame (61) on its outer side; the mesh size of the first filter screen (6) is larger than the mesh size of the second filter screen (7); when the second filter screen (7) is in use, the water inlet of the discharge pipe (3) is located above the second filter screen (7).

4. A coal mine wastewater purification tank according to claim 3, characterized in that: The screw rod (9) is threadedly connected to one end of the second mounting frame (71), and the outer ends of the screw rod (9) are rotatably connected to the purification pool (2) and the first fixed frame (61) respectively. A first motor (91) is installed on the top of the purification pool (2), and the output shaft of the first motor (91) is connected to the screw rod (9). The screw rod (9) has two outer surfaces connected to the movable plate (8) and the second mounting frame (71) in opposite directions. The limiting rod is respectively fixed to the purification tank (2) and the first fixing frame (61), and the limiting rod passes through the interior of the second installation frame (71).

5. A coal mine wastewater purification tank according to claim 1, characterized in that: The conveying rod (5) further comprises a driving rod (51) and a spiral blade (52); one end of the driving rod (51) is rotatably connected to the interior of the wastewater pipe (4), and the other end of the driving rod (51) is rotatably connected to the interior of the purification tank (2); the spiral blade (52) is a spiral structure and is fixed to the outer end of the driving rod (51); a second motor (53) is installed at the outer end of the wastewater pipe (4); and an output shaft of the second motor (53) is connected to the driving rod (51).

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