A pressurized mountain cave pollution water emission repair system

Abstract

The application discloses a pressurized mountain mine cave outburst pollution water repair system, which comprises a mountain, a mine cave outflow outlet on the mountain and a gully formed along the trend of the mountain, the gully is located downstream of the mine cave outflow outlet, a mine cave outflow collection pool and at least one stage of sewage treatment devices are sequentially arranged in the gully from high to low in elevation, the sewage treatment devices of each stage each comprise a repair device and a monitoring pool connected to a downstream end of the repair device, the monitoring pool is provided with a standard water outlet directly discharging into the gully and a non-standard water outlet leading into the repair device of the next stage of sewage treatment devices, and the standard water outlet and the non-standard water outlet are each provided with an electric valve. The application can flow through the repair device by using the potential energy of the pollution water, does not need to increase a power source, and realizes the technical effect of reasonable use of the repair material according to the content of the pollutants by means of multi-stage repair and monitoring, which ensures complete repair and avoids unnecessary waste of the repair material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental remediation, and particularly relates to a non-pressurized mountain mine cave outflow pollution water remediation system. BACKGROUND

[0002] Affected by mining activities, water bodies such as mine cave outflow and groundwater in mining areas are generally polluted by heavy metals, and in severe cases, the pollution exceeds the limited value of poor quality V in the Environmental Quality Standards for Surface Water (GB3838-2002). Mining pollutants are driven by water circulation, and under the action of mine water outflow and groundwater recharge, the quality of the surrounding downstream surface water, soil and other medium environments decreases, and even under the influence of a long time scale, the problem of "non-point source" pollution occurs. The degree of water environmental pollution in mining areas generally presents: mine cave outflow > groundwater > surface water. Therefore, the serious pollution problem in the water quality of surface water and groundwater in the mining environment will affect and threaten the water safety of the local river basin and its downstream.

[0003] At present, for the problem of source pollution of mine cave outflow, the conventional treatment method is to use the method of industrial wastewater treatment, that is, to add pollution remediation agents to the polluted water body (such as reservoirs and surface water) downstream of the mine cave outflow to reduce the content of pollutants in the polluted water body. However, this method is an end control method, and does not reflect the scientific nature of "source control" pollution control, and also has obvious defects, such as late treatment time, large water treatment capacity, low treatment efficiency, high cost, easy pollution diffusion and secondary pollution caused by the addition of agents. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a non-pressurized mountain mine cave outflow pollution water remediation system, which does not need to increase the power source, and the multi-stage remediation and monitoring achieve the technical effect of reasonable use of remediation materials according to the content of pollutants.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is: a non-pressurized mountain mine cave outflow pollution water remediation system, comprising a mountain of a mine, a mine cave outflow outlet on the mountain, and a gully formed along the trend of the mountain, the gully being located downstream of the mine cave outflow outlet, the gully being sequentially arranged with a mine cave outflow collection pool and at least one stage of sewage treatment device in order from high to low in elevation, the sewage treatment device of each stage comprising a remediation device and a monitoring pool connected to the downstream end of the remediation device, the monitoring pool being provided with a standard water outlet directly discharging into the gully and a non-standard water outlet entering the remediation device of the next stage of sewage treatment device, and the standard water outlet and the non-standard water outlet being respectively provided with electric valves.

[0006] As a preferred technical scheme of the present application, the remediation device is a chromatographic column, and the chromatographic column comprises a pipeline laid along the gully, movable joints at both ends of the pipeline, and a filler filled in the pipeline.

[0007] As a preferred technical solution of the present application, the pipeline of the chromatographic column is provided with a segmented filling frame, which comprises an outer ring matched with the inner wall of the pipeline and a unit cell arranged inside the outer ring, and the unit cells of adjacent segmented filling frames are arranged in staggered positions.

[0008] As a preferred technical solution of the present application, the inner wall of the pipeline is provided with a limiting bead, and the outer wall of the outer ring is provided with a limiting groove corresponding to the limiting bead.

[0009] As a preferred technical solution of the present application, the components of the filler include quartz sand and nano zero-valent iron (nZVI), and the mass ratio of the quartz sand and the nano zero-valent iron (nZVI) is 4:1. Through test tests, when the proportion of nZVI is high, the void of the filler system is less, and the water permeability is reduced, and the water flow is prone to be blocked; when the proportion of quartz sand is high, the content of the response material of the filler system is low, and the water treatment capacity is reduced, which is not conducive to long-term continuous repair.

[0010] As a preferred technical solution of the present application, the components of the filler are antimony-removing special nano adsorption resin ASD-180B or NDA-Sb-III. The resin belongs to chelating resin (light yellow spherical particles, particle size range 0.3-1.5mm), the functional group is polystyrene copolymer loaded with rare metal active groups, and the antimony adsorption treatment capacity is ≥3g / L.

[0011] As a preferred technical solution of the present application, when the antimony-removing special nano adsorption resin (ASD-180B or NDA-Sb-III) is saturated after adsorbing antimony, it can be regenerated and recycled by using NaOH solution. The specific steps are as follows: (1) using 1BV (BV represents the voidage of the filler post-column) of pure water to flush the adsorption column; (2) using 3BV of 4% NaOH solution to regenerate at a rate of 1BV / h; (3) using 2-3BV of pure water to wash at a flow rate of 2BV / h; (4) using 3BV of 2% H2SO4 solution to activate the resin at a rate of 2BV / h, and then using 3-5BV of pure water to flush the resin at the same flow rate, so that the effluent pH is weakly acidic (PH≥2), and the next cycle of adsorption can be carried out.

[0012] As a preferred technical solution of the present application, the outer wall of the pipeline is coated with a heat preservation layer.

[0013] The beneficial effects produced by the above technical solution are as follows: (1) the present application can repair and treat from the source of pollution, avoiding the diffusion and pollution of pollutants to the downstream;

[0014] (2) the contaminated water itself flows through the repair device by using its own potential energy, without the need to increase a power source;

[0015] (3) Multi-level remediation and monitoring not only ensured thorough remediation, but also avoided unnecessary waste of remediation materials, achieving the technical effect of rationally using remediation materials according to pollutant content;

[0016] (4) The filling method uses a segmented filling frame to fill the filling section by section, avoiding the void phenomenon caused by uneven compaction of the overall filling method. The cells in the adjacent segmented filling frames are staggered to reduce the water flow rate and uniformly distribute the flow velocity at different positions, avoiding the problem of void flow at the inner wall edge of the chromatography column pipe. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is an overall layout diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the chromatography column and its internal segmented filling frame of the present invention.

[0020] Figure 3 This is a comparison chart showing the effects of various fillers of the present invention on the remediation of antimony pollution.

[0021] Figure 4 This is a graph showing the test results of the effective operating time of ASD-180B, a special resin for antimony pollution remediation, in the laboratory.

[0022] In the diagram: 1. Mountain 2. Gully 3. Mine water outlet 4. Mine water collection pool 5. Movable joint 6. Chromatography column 7. Monitoring pool 8. Standard water outlet 9. Non-standard water outlet 10. Outer ring 11. Cell 12. Limiting rib 13. Limiting groove 14. Segmented filling frame. Detailed Implementation

[0023] See appendix Figures 1-2 In one specific embodiment of the present invention, the structure includes a mine mountain 1, a mine water outlet 3 on the mountain 1, and a gully 2 formed along the mountain's contour. The gully 2 is located downstream of the mine water outlet 3. The gully 2 is arranged in descending order of elevation, with a mine water collection pool 4 and at least one stage of sewage treatment device connected end to end. Each stage of sewage treatment device includes a repair device and a monitoring pool 7 connected to the downstream end of the repair device. The monitoring pool 7 is equipped with a qualified water outlet 8 that directly discharges into the gully 2 and a non-standard water outlet 9 that flows into the repair device of the next stage of sewage treatment device. Both the qualified water outlet 8 and the non-standard water outlet 9 are equipped with electric valves.

[0024] The repair device is a chromatography column 6, which includes a pipe laid along the gully 2, movable joints 5 at both ends of the pipe, and filler material filled in the pipe.

[0025] The pipe of the chromatography column 6 is provided with a segmented packing frame 14, which includes an outer ring 10 matched with the inner wall of the pipe and a unit cell 11 arranged inside the outer ring 10, and the unit cells 11 of adjacent segmented packing frames 14 are arranged staggeredly.

[0026] The inner wall of the pipe is provided with a limiting bead 12, and the outer wall of the outer ring 10 is provided with a limiting groove 13 corresponding to the limiting bead 12. The segmented packing frame 14 improves the convenience and uniformity of the packing, avoids the problem of local voids, and the segmented and staggered arrangement of the packing can reduce the water flow speed and uniformize the flow speed at different positions, thereby avoiding the problem of empty flow at the edge of the inner wall of the pipe of the chromatography column 6.

[0027] The components of the packing include quartz sand and nano zero-valent iron (nZVI), and the mass ratio of the quartz sand and the nano zero-valent iron (nZVI) is 4:1. According to test results, when the proportion of nZVI is high, the packing system has fewer voids, and the water permeability is reduced, and the water flow is prone to be blocked. When the proportion of quartz sand is high, the response material content of the packing system is low, the water treatment capacity is reduced, and it is not conducive to long-term repair.

[0028] The outer wall of the pipe is coated with a thermal insulation layer. The thermal insulation layer can maintain the temperature conditions in the chromatography column and avoid the influence of low temperature environment on the sewage treatment efficiency.

[0029] In other embodiments, the components of the packing are antimony-removing special nano adsorption resin ASD-180B or NDA-Sb-III. This type of resin belongs to chelating resin (light yellow spherical particles, particle size range 0.3-1.5 mm), the functional group is a polystyrene copolymer loaded with rare metal active groups, and the antimony adsorption treatment capacity is ≥3 g / L.

[0030] When the antimony-removing special nano adsorption resin (ASD-180B or NDA-Sb-III) is saturated with adsorbed antimony, it can be regenerated and recycled by using a NaOH solution. The specific steps are as follows: (1) use 1 BV (BV represents the void fraction of the packed column) of pure water to flush the adsorption column; (2) use 3 BV of 4% NaOH solution to regenerate at a rate of 1 BV / h; (3) use 2-3 BV of pure water to wash at a flow rate of 2 BV / h; (4) use 3 BV of 2% H2SO4 solution to activate the resin at a rate of 2 BV / h, and then use 3-5 BV of pure water to flush the resin at the same flow rate, so that the effluent pH is weakly acidic (pH≥2), and the next cycle of adsorption can be performed.

[0031] Comparison of repair effects of different packings: as shown in Table I and Figure 3As shown, the comparative study shows that nZVI, S-nZVI, nCaO2 / PFS and ASD-180B have very good treatment effect on raw water (co-precipitation), and can reduce the concentration of antimony from 2.89 mg / mL to <0.005 mg / mL (national limit value of drinking water safety), which has obvious application prospect; activated carbon (AC) and zeolite only have removal effect on Sb under acidic conditions; chitosan has no treatment effect on Sb in raw water; FeCl3 has certain treatment effect on Sb in raw water. Figure 4 It is shown (experimental conditions: the repair target is the mine tunnel water, the concentration of Sb in the mine tunnel water is 2.89 ug / mL, ASD-180B resin is 62.85 g, the void after filling is approximately 7 mL, one water sample is collected every 20 min, the running flow rate is 1 mL / min, the total running time is 5 days, and the continuous running time is 8 h per day) that the Sb pollution repair special resin ASD-180B can be effectively continuously operated for 5 days (8 h per day), and the concentration of Sb is still less than <0.005 mg / mL.

[0032] In view of the above effect comparison and cost consideration, the Sb pollution repair special resin ASD-180B can achieve very good treatment effect and can be reused through regeneration, so it is recommended as the optimal filler type in the project engineering construction.

[0033] Table 1: Heavy metal (Sb) treatment effect statistical table of mine tunnel water in the antimony mine concentration area in the west of Henan Province

[0034]

[0035]

[0036] Note: "raw water" refers to the mine tunnel water of No. 22S06 sample; "AC" refers to activated carbon; "√√" indicates that the repair effect is very good.

[0037] The above description is only proposed as the technical scheme that can be implemented by the present application, and is not a single limitation condition for the technical scheme itself.

Claims

1. A pressurized mountain mine gushing contaminated water remediation system, comprising a mountain, a mine gushing outlet on the mountain, and a gully formed along the trend of the mountain, the gully being located downstream of the mine gushing outlet, characterized in that: The gully is sequentially arranged with a mine tunnel water gushing collection pool and at least one stage of sewage treatment device from high to low in elevation, the sewage treatment device of each stage comprises a remediation device and a monitoring pool connected to the downstream end of the remediation device, the monitoring pool is provided with a standard water outlet directly discharging into the gully and a non-standard water outlet into the remediation device of the next stage of sewage treatment device, and the standard water outlet and the non-standard water outlet are respectively provided with electric valves; The remediation device is a chromatographic column, the chromatographic column comprises a pipeline laid along the gully, movable joints at both ends of the pipeline and a filler filled in the pipeline; The pipeline of the chromatographic column is provided with a segmented filling frame, the segmented filling frame comprises an outer ring matched with the inner wall of the pipeline and a unit cell arranged inside the outer ring, and the unit cells of adjacent segmented filling frames are arranged in a staggered manner; The inner wall of the pipeline is provided with a limiting bead, and the outer wall of the outer ring is provided with a limiting groove corresponding to the limiting bead.

2. The repair system of claim 1, wherein: The components of the filler include quartz sand and nano zero-valent iron, and the mass ratio of the quartz sand and the nano zero-valent iron is 4:

1.

3. The repair system of claim 1, wherein: The components of the filler are antimony-removing special nano adsorption resin.

4. The repair system of claim 3, wherein: The antimony-removing special nano adsorption resin is a chelating resin, which is light yellow spherical granular, the particle size range is 0.3-1.5mm, the functional group is a polystyrene copolymer loaded with rare metal active groups, and the antimony adsorption treatment capacity is ≥3g / L.

5. The repair system of claim 2, wherein: The outer wall of the pipeline is coated with a heat preservation layer.

Images