Loading rapid sinking treatment system for mine water

Abstract

The utility model discloses a loading rapid sedimentation treatment system for mine water. The loading rapid sedimentation treatment system sequentially comprises a pre-sedimentation tank treatment unit and a magnetic coagulation sedimentation unit, the pre-sedimentation tank treatment unit comprises a coagulation tank I, a flocculation tank I and a sedimentation tank I which are connected in sequence; the magnetic coagulation sedimentation unit comprises a coagulation tank II, a magnetic loading tank, a flocculation tank II and a sedimentation tank II which are connected in sequence; effluent of a sedimentation tank I in the pre-sedimentation tank treatment unit enters a coagulation tank II of the magnetic coagulation sedimentation unit; sludge in the sedimentation tank I is discharged out of the system through a suction dredger; sludge in the sedimentation tank II is respectively fed into a subsequent sludge treatment unit and a magnetic loading tank through a sludge discharge pipe. According to the rapid sedimentation treatment system, the sedimentation time of suspended matters in mine water can be greatly shortened, and the surface treatment load of the sedimentation tank is improved, so that the floor area of the treatment system is greatly reduced while a good treatment effect (the SS concentration in effluent is stably less than 5mg / L) is achieved.

Description

Technical Field

[0001] The utility model relates to a loading and rapid sedimentation treatment system for mine water. Background Art

[0002] Mine water is a by-product of the mining process of mineral resources and is also a very important unconventional water. Mine water will flow into the shaft and working face during the construction and production of the mine. This water comes from atmospheric precipitation, surface water, groundwater, etc. During the coal mining process, water comes into contact with coal seams and rock formations, and coupled with the influence of human activities, it will produce physical, chemical and biochemical reactions. The water often contains a high content of suspended matter, fine sand and gravel with a large specific gravity, and organic pollutants. Its SS content is usually 3000-5000 mg / L. The discharge or leakage of untreated mine water will cause surface soil erosion, salinization, and vegetation withering.

[0003] Mine water contains much more suspended solids than surface water and is less stable. Most of the suspended solids are small, light in weight, and have slow settling rates, resulting in poor coagulation. Current methods for removing suspended solids from mine water involve adding PAC and PAM to aggregate the solids, followed by treatment in baffle or cyclone reactors. However, these treatment methods suffer from low treatment loads and poor settling efficiency. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a loaded rapid sedimentation treatment system for mine water, which can significantly shorten the sedimentation time of suspended matter in mine water and increase the surface treatment load of the sedimentation tank, thereby achieving good treatment effects (the SS concentration in the effluent is stably less than 5 mg / L) while significantly reducing the footprint of the treatment system.

[0005] Technical solution: The loaded rapid sedimentation treatment system described in the utility model includes a pre-sedimentation tank treatment unit and a magnetic coagulation sedimentation unit in sequence; the pre-sedimentation tank treatment unit includes a coagulation tank I, a flocculation tank I and a sedimentation tank I connected in sequence; the magnetic coagulation sedimentation unit includes a coagulation tank II, a magnetic loading tank, a flocculation tank II and a sedimentation tank II connected in sequence; the effluent from the sedimentation tank I in the pre-sedimentation tank treatment unit enters the coagulation tank II of the magnetic coagulation sedimentation unit; the sludge in the sedimentation tank I is discharged from the system through a sludge suction machine; the sludge in the sedimentation tank II is respectively sent to the subsequent sludge treatment unit and the magnetic loading tank through a sludge discharge pipe.

[0006] The sludge treatment unit includes a high shear machine for shearing magnetic seed sludge flocs, a magnetic separator for separating magnetic powder and sludge, a sludge thickening tank and a filter press; the magnetic separator sends the separated magnetic powder into the magnetic loading tank.

[0007] Wherein, a sludge scraper is provided in the sludge thickening tank.

[0008] Wherein, the sludge return rate in the magnetic loading tank is 4-8%.

[0009] Wherein, a mud level meter is provided in the sedimentation tank II; a mud discharge pump is provided on the mud discharge pipe, and the mud level meter and the mud discharge pump are respectively connected to the control box.

[0010] Wherein, a rotary filter is provided on the outlet pipe of the sedimentation tank II, and the rotary filter serves as a protection unit for the magnetic coagulation effluent, so that the effluent is stabilized to be less than 5 mg / L.

[0011] Wherein, the coagulation tank I, flocculation tank I, coagulation tank II, magnetic loading tank and flocculation tank II are all provided with stirring devices.

[0012] Beneficial effects: Compared with the existing technology, the utility model has the following advantages: the utility model adopts two-stage sedimentation units to remove high SS. The first stage adopts a pre-sedimentation unit for treatment to remove most of the SS and fine gravel in the influent. The effluent from the first stage sedimentation unit enters the second stage magnetic coagulation sedimentation unit. By adding magnetic powder and PAM, the influent SS and heavy medium magnetic powder are clustered, thereby accelerating the sedimentation rate of the sludge, increasing the surface treatment load of the sedimentation tank, reducing the footprint of the mine water rapid sedimentation treatment system, and achieving good treatment effects, ensuring that the effluent SS is stable ≤5mg / L. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the system principle diagram of the rapid sedimentation treatment system of the utility model. DETAILED DESCRIPTION

[0014] like Figure 1As shown, the loading and rapid sedimentation treatment system of mine water of the present invention comprises a pre-sedimentation tank treatment unit 7 and a magnetic coagulation sedimentation unit 20 in sequence; the pre-sedimentation tank treatment unit 7 comprises a coagulation tank I8, a flocculation tank I9 and a sedimentation tank I10 connected in sequence; a mine water inlet 1 is provided on the coagulation tank I8, a PAC liquid injection port I2 is provided on the top of the coagulation tank I8, and a mixer I3 is provided inside the coagulation tank I8; a PAM liquid injection port I4 is provided on the top of the flocculation tank I9, and a mixer II5 is provided inside the flocculation tank I9; a mud suction pipe 1 is provided in the sedimentation tank I10 1, the sludge in the sedimentation tank I10 is discharged from the treatment system through the sludge suction machine 6; the pre-sedimentation tank treatment unit 7 is used for the pre-sedimentation of heavy medium particles in the mine water to ensure the stability of the water quality entering the subsequent magnetic coagulation sedimentation unit 20 through the magnetic coagulation water inlet 12. The pre-sedimentation tank treatment unit 7 adopts an assembled carbon steel structure with a hydraulic retention time of 1.85 hours; the effluent from the sedimentation tank I10 in the pre-sedimentation tank treatment unit 7 enters the coagulation tank II21 of the magnetic coagulation sedimentation unit 20 through gravity flow, and the pre-sedimentation tank treatment unit 7 converts the initial SS content into The mine water with a concentration of 3000-5000 mg / L is reduced to 300-500 mg / L and then sent to the magnetic coagulation sedimentation unit 20; the magnetic coagulation sedimentation unit 20 includes a coagulation tank II21, a magnetic loading tank 22, a flocculation tank II23 and a sedimentation tank II24 connected in sequence; a PAC liquid addition port II13 is provided on the top of the coagulation tank II21, a mixer III14 is provided in the coagulation tank II21, a mixer IV15 is provided in the magnetic loading tank 22, a PAM liquid addition port II16 is provided on the top of the flocculation tank II23, and a PAM liquid addition port II17 is provided on the top of the flocculation tank II23. II23 is provided with a mixer V17, and the sedimentation tank II24 is provided with a scraper I19; the sludge treatment unit 33 includes a high shear machine 41 for shearing magnetic seed sludge flocs, a magnetic separator 40 for separating magnetic powder and sludge, a sludge thickening tank 38 and a filter press 34; the magnetic separator 40 sends the separated magnetic powder into the magnetic loading tank 22; the sludge in the sedimentation tank II24 is respectively sent to the subsequent sludge treatment unit 33 and the magnetic loading tank 22 through the mud discharge pipe 25, and the mud discharge pipe 25 is provided with a mud discharge pump (26, 27) (one for use and one for standby).

[0015] The magnetic coagulation sedimentation unit 20 is provided with a magnetic loading tank 22 between the coagulation tank II 21 and the flocculation tank II 23 , and magnetic powder is added to enable the flocs and the magnetic powder to co-precipitate quickly. The effluent from the pre-sedimentation tank treatment unit 7 first enters the coagulation tank II21 of the magnetic coagulation sedimentation unit 20, and the coagulant PAC is added to the coagulation tank II21 at the same time. After the two are fully stirred and mixed, they enter the magnetic loading tank 22, and the sludge particles are mixed with the magnetic powder and the sludge returned by the sludge pump (26, 27). After sufficient stirring, they enter the flocculation tank II23 to react with the added flocculant PAM to generate larger floc particles, and finally enter the sedimentation tank II24 for rapid sedimentation. The effluent SS of the sedimentation tank II24 is less than 5 mg / L, and the rotary filter 28 further ensures that the SS in the effluent is stable less than 5 mg / L, and then enters the intermediate water tank 30 through the intermediate water tank inlet pipe 29, which is used to collect the water produced by the magnetic coagulation sedimentation unit 20 and provide a stable water source for the subsequent deep treatment unit. The intermediate water tank 30 is an assembled carbon steel structure with a designed residence time of not less than 1.5 hours, and then discharged from the intermediate water tank 30 through the water production pipe 31.

[0016] Sedimentation tank II24 surface hydraulic load range is 10m 3 / (m 2 ·h)~20m 3 / (m 2 h); PAC includes iron salts, aluminum salts, or their polymerized salts, with a concentration range of 200 to 500 ppm in the water. The magnetic powder is ferroferric oxide, with an initial dosage of 0.5% to 1% of the effective volume of the magnetic coagulation and sedimentation unit 20, and subsequent replenishment at a rate of 5 to 10 g per ton of water. PAM is polyacrylamide, with a dry powder dosage of 0.5 to 2 mg / L.

[0017] The sedimentation tank II24 uses the mud level meter 18 to accurately control the sludge discharge. When the sludge interface in the sedimentation tank II24 reaches the set value 1, the frequency of the sludge pump is increased to increase the sludge discharge volume. When the sludge interface in the sedimentation tank II24 is lower than the set value 2, the frequency of the sludge pump is reduced to reduce the sludge discharge volume and maintain the stable operation of the system. Part of the sludge flows back to the magnetic loading tank 22 through the sludge pipe I32, and the other part is pumped into the high shear machine 41 through the sludge pipe II42. The high shear machine 41 processes the sludge flocs containing magnetic seeds. The magnetic powder is sheared and efficiently dispersed into magnetic powder and residual sludge, which are then pumped into the magnetic separator 40. The magnetic powder is sent from the magnetic separator 40 to the magnetic loading tank 22 through the magnetic powder recovery pipe 45 for recycling, and the residual sludge enters the sludge thickening tank 38 (a scraper II37 is provided in the sludge thickening tank 38) through the magnetic separator outlet 39. The concentrated sludge is then pumped from the outlet 44 of the sludge thickening tank 38 through the filter press mud pump 36 into the filter press 34 for filtration, and the filter cake is discharged from the filter cake outlet 43 for outsourced processing.

Claims

1. A loading and rapid sedimentation treatment system for mine water, characterized by: The invention comprises a pre-sedimentation tank treatment unit (7) and a magnetic coagulation sedimentation unit (20) in sequence; the pre-sedimentation tank treatment unit (7) comprises a coagulation tank I (8), a flocculation tank I (9) and a sedimentation tank I (10) which are connected in sequence; the magnetic coagulation sedimentation unit (20) comprises a coagulation tank II (21), a magnetic loading tank (22), a flocculation tank II (23) and a sedimentation tank II (24) which are connected in sequence; the effluent of the sedimentation tank I (10) in the pre-sedimentation tank treatment unit (7) enters the coagulation tank II (21) of the magnetic coagulation sedimentation unit (20); the sludge in the sedimentation tank I (10) is discharged from the system through a sludge suction machine (6); the sludge in the sedimentation tank II (24) is respectively sent to a subsequent sludge treatment unit (33) and a magnetic loading tank (22) through a sludge discharge pipe (25).

2. The loading and rapid sedimentation treatment system according to claim 1, characterized in that: The sludge treatment unit (33) comprises a high shear machine (41) for shearing magnetic seed-containing sludge flocs, a magnetic separator (40) for separating magnetic powder and sludge, a sludge concentration tank (38), and a filter press (34); the magnetic separator (40) sends the separated magnetic powder into a magnetic loading tank (22).

3. The loading and rapid sedimentation treatment system according to claim 2, characterized in that: A sludge scraper (37) is provided in the sludge thickening tank (38).

4. The loading and rapid sedimentation treatment system according to claim 1, characterized in that: The sludge reflux rate in the magnetic loading tank (22) is 4-8%.

5. The loading and rapid sedimentation treatment system according to claim 1, characterized in that: A mud level meter (18) is provided in the sedimentation tank II (24); a mud discharge pump is provided on the mud discharge pipe (25); and the mud level meter (18) and the mud discharge pump are respectively connected to a control box.

6. The loading and rapid sedimentation treatment system according to claim 1, characterized in that: A rotary disc filter (28) is provided on the water outlet pipe of the sedimentation tank II (24).

7. The loading and rapid sedimentation treatment system according to claim 1, characterized in that: The coagulation tank I (8), the flocculation tank I (9), the coagulation tank II (21), the magnetic loading tank (22) and the flocculation tank II (23) are all provided with stirring devices.

Images