Mine water precipitation device

Abstract

The utility model provides a mine water precipitation device, which belongs to the technical field of water treatment and comprises a mixing area, a flocculation area and a precipitation area which are arranged side by side, the mixing area is connected with the flocculation area through a first pipeline, and the flocculation area is connected with the precipitation area through a flow channel; a backflow pipeline is arranged at the bottom of the settling zone and is communicated with the first pipeline between the mixing zone and the flocculation zone. According to the utility model, the flocculation effect can be enhanced, the flocculation time is shortened, and the mine water treatment efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, and in particular relates to a mine water sedimentation device. Background Technology

[0002] Coal mine water refers to all water that seeps into the underground mining space during the coal mining process, and sometimes also contains a small amount of surface water. Coal mine water treatment technologies mainly include: neutralizing acidic water, flocculation to remove suspended particulate matter, reverse osmosis to remove soluble salts, and combinations thereof. Various methods are employed to remove or reduce harmful substances in mine water, ensuring it meets discharge standards and the environmental quality standards of receiving water bodies, or treating it to various target water qualities.

[0003] When mine water flows through the working face, it carries in a large amount of suspended solids such as coal dust and rock particles, causing the mine water to become turbid, with a distinct color, mostly black and yellowish-brown, and poor sensory properties. The average suspended solids content is above 500 mg / L, and the main components are coal dust, particulate matter, and colloidal FeOH. The high suspended solids content leads to high chemical oxygen demand, bacterial growth in the mine water, and environmental pollution when discharged.

[0004] The invention patent with publication number CN118005151A provides a composite coal mine water well water high-efficiency sedimentation device. By adding magnetic powder to the mine water, flocs with large particle size and high density are formed under the action of coagulant and coagulant aid, which increases the collision opportunity and accelerates the settling speed of flocs in the sedimentation zone. However, it seriously affects the mine water treatment efficiency when there is a long flocculation time. Utility Model Content

[0005] In view of the defects or deficiencies in the existing technology, this utility model provides a mine water sedimentation device that can enhance the flocculation effect, reduce the flocculation time, and improve the mine water treatment efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An embodiment of this utility model provides a mine water sedimentation device, including a mixing zone, a flocculation zone and a sedimentation zone, which are arranged side by side. The mixing zone and the flocculation zone are connected by a first pipe, and the flocculation zone and the sedimentation zone are connected by a flow channel.

[0008] A reflux pipe is provided at the bottom of the sedimentation zone, and the reflux pipe is connected to the first pipe between the mixing zone and the flocculation zone.

[0009] Furthermore, the mixing zone includes a mixing tank, on the top of which a first stirring motor is provided. The output shaft of the first stirring motor is connected to a first stirring shaft, which extends to the bottom of the mixing tank. Stirring blades are provided at the bottom end of the first stirring shaft.

[0010] Furthermore, the mixing tank has an opening at the top, and magnetic powder pipes and coagulant pipes are provided above the mixing tank.

[0011] Furthermore, the flocculation zone includes a flocculation tank, the bottom of which is provided with a flocculation tank inlet, and the mixing tank outlet is connected to the flocculation tank inlet via a first pipe.

[0012] Furthermore, a second stirring motor is installed at the top of the flocculation tank, and a second stirring shaft is fixedly connected to the output shaft of the second stirring motor. A second stirring blade is installed at the bottom end of the second stirring shaft, and the second stirring blade is installed in the opposite direction to the first stirring blade.

[0013] Furthermore, a guide tube is provided inside the flocculation tank, and the guide tube is sleeved on the outside of the second stirring shaft and the second stirring blade.

[0014] Furthermore, a coagulant aid pipe is provided at the top of the flocculation tank, extending into the interior of the flocculation tank, and the outlet of the coagulant aid pipe is located below the second stirring blade.

[0015] Furthermore, the sedimentation zone includes a sedimentation tank, which is connected to the flocculation tank via a flow channel. The flow channel is S-shaped, with one end connected to the bottom of the side wall of the flocculation tank and the other end connected to the top of the side wall of the sedimentation tank.

[0016] Furthermore, a drive motor is installed at the top of the sedimentation tank, and a rotating shaft is fixedly connected to the output shaft of the drive motor. A scraper is installed at the bottom end of the rotating shaft. The bottom of the sedimentation tank is inverted conical, and the scraper is in contact with the bottom surface of the sedimentation tank.

[0017] Furthermore, a sludge collection trough is provided in the middle of the bottom surface of the sedimentation tank, and a second pipe is provided at the bottom of the sludge collection trough. The sedimentation tank is connected to the magnetic powder recovery device through the second pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention utilizes a return pipe installed at the bottom of the sedimentation tank, which is connected to a first pipe between the mixing zone and the flocculation zone. By using the return pipe to return some of the sludge in the sedimentation tank to the flocculation tank, it achieves contact flocculation, enhances the flocculation effect, reduces flocculation time, and improves the efficiency of mine water treatment. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the precipitation device structure in an embodiment of this utility model;

[0021] The components include: 1. Mixing tank; 2. Magnetic powder pipeline; 3. Coagulant pipeline; 4. Flocculation tank; 5. Coagulant aid pipeline; 6. First pipeline; 7. Sedimentation tank; 8. Flow channel; 9. Second pipeline; 10. Magnetic powder recovery device; 11. Excess sludge pump; 12. Return pipeline; 13. Circulating sludge pump; 14. Inclined tube packing; 15. Guide tube. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] A typical embodiment of this utility model is as follows: Figure 1 As shown, a mine water sedimentation device includes a mixing zone, a flocculation zone, and a sedimentation zone, which are arranged side by side. Mine water passes through the mixing zone, flocculation zone, and sedimentation zone in sequence to remove suspended solids from the mine water.

[0024] Specifically, the mixing zone includes a mixing agitator, a magnetic powder pipe 2, and a coagulant pipe 3. The mixing agitator includes a mixing tank 1. A first stirring motor is installed at the top of the mixing tank 1. The output shaft of the first stirring motor is connected to a first stirring shaft. The first stirring shaft extends to the bottom of the mixing tank 1. Stirring blades are installed at the bottom end of the first stirring shaft. A mixing tank inlet is opened above the side wall of the mixing tank 1, and a mixing tank outlet is opened at the bottom of the mixing tank 1. Mine water enters from the mixing tank inlet and flows out from the mixing tank outlet.

[0025] The mixing tank 1 has an opening at the top. The magnetic powder pipe 2 and the coagulant pipe 3 are both located above the mixing tank 1. Magnetic powder and coagulant are added into the mixing tank 1 through the magnetic powder pipe 2 and the coagulant pipe 3, and mixed with the mine water under the action of the first stirring blade. At the same time, the mine water is pushed out from the mixing tank outlet at the bottom of the mixing tank 1.

[0026] The flocculation zone includes a flocculation agitator and a coagulant aid pipeline 5. The flocculation agitator includes a flocculation tank 4. The bottom surface of the flocculation tank 4 is provided with a flocculation tank inlet. The mixing tank outlet and the flocculation tank inlet are connected by a first pipeline 6. Mine water containing magnetic powder and coagulant flows out from the mixing tank outlet and flows into the flocculation tank 4 from the mixing tank 1 through the first pipeline 6.

[0027] A second stirring motor is installed at the top of the flocculation tank 4. The output shaft of the second stirring motor is fixedly connected to a second stirring shaft. A second stirring blade is installed at the bottom of the second stirring shaft. The second stirring blade is installed in the opposite direction to the first stirring blade. A guide tube 15 is installed inside the flocculation tank 4. The guide tube 15 is sleeved on the outside of the second stirring shaft and the second stirring blade. A coagulant aid pipe 5 is installed at the top of the flocculation tank 4. The coagulant aid pipe 5 extends into the flocculation tank 4, and the outlet of the coagulant aid pipe 5 is located below the second stirring blade. Mine water containing magnetic powder and coagulant enters from the bottom of the flocculation tank 4. Since the second stirring blade is installed in the opposite direction to the first stirring blade, the mine water flows upward along the guide tube 15 under the drive of the second stirring blade. During this process, it passes through the outlet of the coagulant aid pipe 5. The coagulant aid pipe 5 adds coagulant to the mine water and mixes it under the action of the second stirring blade. The magnetic powder acts as the flocculation nucleus, causing the non-magnetic suspended matter to combine with the magnetic powder under the combined action of the coagulant and the coagulant aid, forming a magnetic composite with the magnetic powder as the core. These magnetic composites attract each other under the influence of a magnetic field, forming flocs with large particle size and high density. This increases the chance of collision, accelerates the settling speed of the flocs in the sedimentation zone, effectively shortens the hydraulic residence time in the sedimentation zone, and increases the surface aggregation.

[0028] The sedimentation zone includes sedimentation tank 7, which is connected to flocculation tank 4 via flow channel 8. Flow channel 8 is S-shaped, with one end connected to the bottom of the side wall of flocculation tank 4 and the other end connected to the top of the side wall of sedimentation tank 7. Mine water flows out from the top of the guide tube 15 and flows along the side wall of flocculation tank 4 to the bottom of flocculation tank 4. It then flows into sedimentation tank 7 from the top via flow channel 8. By setting up flow channel 8, the mixing effect can be further enhanced.

[0029] A drive motor is installed at the top of the sedimentation tank 7. The output shaft of the drive motor is fixedly connected to a rotating shaft. A scraper is installed at the bottom end of the rotating shaft. The bottom of the sedimentation tank 7 is inverted conical. The scraper is in contact with the bottom surface of the sedimentation tank 7. Driven by the drive motor, the scraper rotates on the bottom surface of the sedimentation tank 7, thereby scraping the sludge settled on the bottom surface of the sedimentation tank 7. A sludge collection trough is set in the middle of the bottom surface of the sedimentation tank 7. The scraped sludge finally flows into the sludge collection trough.

[0030] A second pipe 9 is provided at the bottom of the sludge collection tank. The sedimentation tank 7 is connected to the magnetic powder recovery device 10 through the second pipe 9. A residual sludge pump 11 is provided on the second pipe 9. The sludge in the sludge collection tank flows to the magnetic powder recovery device 10 through the second pipe 9. The magnetic powder recovery device 10 is a high shear and a magnetic separator. The high shear and magnetic separator are used to recover the magnetic powder in the residual sludge and put it back into the mixing zone for recycling, which reduces the amount of magnetic powder to be replenished. The sludge after recovering the magnetic powder is transported to the sludge treatment system for processing.

[0031] The above-mentioned technology of recovering magnetic powder using a high-shear separator and a magnetic separator is existing technology and will not be described in detail here.

[0032] The bottom of the sludge collection tank is also equipped with a return pipe 12. The sedimentation tank 7 is connected to the first pipe 6 between the mixing tank 1 and the flocculation tank 4 through the return pipe 12. A circulating sludge pump 13 is installed on the return pipe 12. Part of the sludge in the sedimentation tank 7 is returned to the flocculation tank 4 through the return pipe 12 (the return flow rate accounts for about 5%-10% of the treated water volume), so as to play the role of contact flocculation, enhance the flocculation effect, reduce the flocculation time, and improve the efficiency of mine water treatment.

[0033] The top of the sedimentation tank 7 is equipped with inclined tube packing 14 to increase the sedimentation area. The purified mine water flows out from the top of the sedimentation tank 7 and can be used for underground fire fighting, dust removal and ground washing.

[0034] This invention utilizes a return pipe installed at the bottom of the sedimentation tank, which is connected to a first pipe between the mixing zone and the flocculation zone. By using the return pipe to return some of the sludge in the sedimentation tank to the flocculation tank, it achieves contact flocculation, enhances the flocculation effect, reduces flocculation time, and improves the efficiency of mine water treatment.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mine water settling device, characterised in that, The device comprises a mixing area, a flocculation area and a precipitation area, the mixing area, the flocculation area and the precipitation area are arranged side by side, the mixing area and the flocculation area are connected through a first pipeline, and the flocculation area and the precipitation area are connected through a flow channel. The bottom of the precipitation area is provided with a reflux pipeline, and the reflux pipeline is connected with the first pipeline between the mixing area and the flocculation area.

2. A mine water settling device as claimed in claim 1, characterised in that, The mixing area comprises a mixing pool, the top of the mixing pool is provided with a first stirring motor, the output shaft of the first stirring motor is connected with a first stirring shaft, the first stirring shaft extends to the bottom of the mixing pool, and the bottom end of the first stirring shaft is provided with stirring blades.

3. A mine water precipitation apparatus as claimed in claim 2, characterised in that, The top of the mixing pool is open, and the mixing pool is provided above with a magnetic powder pipeline and a coagulant pipeline.

4. A mine water precipitation apparatus as claimed in claim 2, characterised in that, The flocculation area comprises a flocculation pool, the bottom surface of the flocculation pool is provided with a flocculation pool inlet, and the outlet of the mixing pool is connected with the flocculation pool inlet through the first pipeline.

5. A mine water precipitation apparatus as claimed in claim 4, characterised in that, The top of the flocculation pool is provided with a second stirring motor, the output shaft of the second stirring motor is fixedly connected with a second stirring shaft, the bottom end of the second stirring shaft is provided with second stirring blades, and the mounting direction of the second stirring blades is opposite to that of the first stirring blades.

6. A mine water precipitation apparatus as claimed in claim 5, characterised in that, The flocculation pool is provided with a flow guide cylinder, and the flow guide cylinder is arranged outside the second stirring shaft and the second stirring blades.

7. A mine water precipitation apparatus as claimed in claim 6, characterised in that, The top of the flocculation pool is provided with a coagulant aid pipeline, the coagulant aid pipeline extends into the flocculation pool, and the outlet of the coagulant aid pipeline is located below the second stirring blades.

8. A mine water precipitation apparatus as claimed in claim 4, characterised in that, The precipitation area comprises a precipitation pool, the precipitation pool is connected with the flocculation pool through a flow channel, the flow channel is S-shaped, one end of the flow channel is connected with the bottom end of the side wall of the flocculation pool, and the other end is connected with the top of the side wall of the precipitation pool.

9. A mine water precipitation apparatus as claimed in claim 8, characterised in that, The top of the precipitation pool is provided with a driving motor, the output shaft of the driving motor is fixedly connected with a rotating shaft, the bottom end of the rotating shaft is provided with a scraper, and the bottom of the precipitation pool is in the shape of an inverted cone, and the scraper is attached to the bottom surface of the precipitation pool.

10. A mine water precipitation apparatus as claimed in claim 8, characterised in that, The middle of the bottom surface of the precipitation pool is provided with a sludge collecting groove, the bottom of the sludge collecting groove is provided with a second pipeline, and the precipitation pool is connected with a magnetic powder recycling device through the second pipeline.

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