Treatment system for failure of phytoremediation method caused by water and soil loss of metal mine

Abstract

The utility model relates to a treatment system for plant restoration method failure caused by water and soil loss of a metal mine. The system comprises a grass quilt, a drainage ditch, a plurality of water suction pipes, an intercepting ditch and a drainage ditch which are arranged on a mine side slope, a sedimentation tank, a water storage treatment tank and a water flowing platform which are arranged in a treatment area, and a plurality of drainage pipes arranged in a stable forest area. The tail end of the drainage channel is connected with the sedimentation tank, and the other side of the sedimentation tank is connected with a water inlet of the water storage treatment tank; a water outlet of the water storage treatment pond is connected with a water flowing table, and the tail end of the water flowing table is connected with a plurality of drainage pipes; the water storage treatment pond comprises a water storage pond and a treatment pond which are separated by a central partition plate; a gap is formed between the bottom of the central partition plate and the tank bottom and forms a bottom communicating surface of the water storage tank and the treatment tank; a silicon dioxide nano material layer I, an iron oxide nano material layer and a silicon dioxide nano material layer II are sequentially arranged in the treatment tank from top to bottom. The device has the advantages of being low in cost, environmentally friendly, good in auxiliary repairing effect and capable of avoiding failure of a plant repairing method.

Description

Technical Field

[0001] The utility model relates to the technical field of ecological restoration of metal mines, in particular to a treatment system for the failure of plant restoration method caused by soil and water loss in metal mines. Background Technique

[0002] With the rapid development of China's social economy, the demand for mineral resources in the process of production and life is increasing day by day, and the demand is showing a rapid development trend. In metal mines, large areas are exposed, and heavy metal pollution of soil and groundwater is extremely likely to occur. Therefore, the comprehensive treatment and restoration of the ecological environment in metal mining areas have received extensive social attention.

[0003] The stock of historical legacy metal mines in China is huge. The current metal mine restoration methods include chemical restoration method, physical restoration method and biological restoration method, but there are generally the following problems: (1) The chemical restoration method can quickly and effectively restore metal mines, but it cannot achieve centralized treatment and is not suitable for the restoration of medium and large mines; (2) The existing metal mine restoration methods are gradually inclined to biological restoration, mainly plant restoration, but the plant restoration period is long, and soil and water loss and metal pollution are likely to occur during heavy rainfall in the initial stage, resulting in the problem of ineffective restoration; (3) Some of the existing metal mine restoration methods consider the problem of soil and water loss, and use intercepting and drainage ditches, etc., but there are problems that the cost is high when a large number of intercepting and drainage ditches are arranged, and soil and water loss still exists when a small number are arranged; at the same time, the existing metal mine restoration methods that consider the problem of soil and water loss are mainly based on the plant restoration method. The same as problem (2), the plant restoration method is ineffective in the initial stage of restoration, and the problem of untreated polluted water is not deeply considered, that is, the intercepted and drained water has been polluted. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a treatment system for the failure of plant restoration method caused by soil and water loss in metal mines, which has low cost, environmental protection, good restoration effect and can avoid the failure of plant restoration method.

[0005] To solve the above problems, a treatment system for the failure of plant restoration caused by soil and water loss in metal mines according to the present utility model is characterized in that: the system includes a grass cover, a drainage ditch, several water suction pipes, a cut-off ditch and a drainage channel provided on the mine slope, a sedimentation tank, a water storage and treatment tank and a flowing water table provided in the treatment area, and several drain pipes provided in the stable forest area; the drainage ditch is connected to several water suction pipes; the cut-off ditch is transversely provided on the drainage ditch, and the drainage channel is provided at the lower part of the bottom of the drainage ditch; the end of the drainage channel is connected to the sedimentation tank, and the other side of the sedimentation tank is connected to the water inlet of the water storage and treatment tank; the water outlet of the water storage and treatment tank is connected to the flowing water table, and the end of the flowing water table is connected to several drain pipes; the water storage and treatment tank includes a water storage tank and a treatment tank separated by a central partition; a gap is provided between the bottom of the central partition and the bottom of the tank, and the gap forms the bottom communication surface between the water storage tank and the treatment tank; the treatment tank is successively provided with a silica nanomaterial layer I, an iron oxide nanomaterial layer, and a silica nanomaterial layer II from top to bottom.

[0006] The drainage ditch is a vertical drainage ditch embedded in the soil body and is connected to several water suction pipes in a way of oblique connection on both sides; several water suction pipes are buried in the soil body.

[0007] The cut-off ditch is a transverse drainage ditch embedded in the soil body.

[0008] The drainage channel is a collecting drainage ditch with a lower middle part.

[0009] The sedimentation tank is an open-air square tank.

[0010] The flowing water table is a multi-step platform with edges on both sides and a bottom plate is provided at the bottom; one side of the bottom plate is connected with a side baffle, and a water flow baffle and an upper baffle connected together are provided at the end, and a drain pipe head is provided on the water flow baffle; the upper baffle is connected with the side baffle.

[0011] The drain pipe is a split-type perforated drain pipe.

[0012] The water storage and treatment tank is circular, and both the water storage tank and the treatment tank are semi-circular tanks.

[0013] A chemical precipitant is laid on the bottom of the water storage and treatment tank.

[0014] The water storage tank is connected to the sedimentation tank; the treatment tank is connected to the flowing water table.

[0015] The present utility model has the following advantages compared with the prior art:

[0016] 1. In the present utility model, the water suction pipe is used as the main water collection device, and the other devices are auxiliary, which greatly reduces the engineering quantity of the structure, not only saves costs, but also improves the ecological environment stability of the mining area, solves the problem of the failure of the phytoremediation method, and further realizes the economicization goal for the restoration of large mines.

[0017] 2. In the present utility model, through the setting of the sedimentation tank, the water storage treatment tank, the water flow platform and the split type perforated drain pipe, multi-step energy dissipation treatment is carried out on the collected water flow, which helps to realize the slow collection and release of water under rainfall of heavy rain and above levels, prevent secondary geological disasters, and has a more significant effect on the restoration and treatment of rainy metal mines.

[0018] 3. In the present utility model, through the use of natural environmental protection chemical precipitants and silica nano-material layers in the water storage treatment tank, multi-step centralized treatment of heavy metal pollutants is carried out to achieve the centralized recovery of heavy metals and the purification of residual pollutants, so that the water quality is purified to achieve the purpose of final discharge, and thus the environmental protection of the metal mine restoration is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings.

[0020] Figure 1 It is the restoration plan view of a certain large metal abandoned aluminum mine of the embodiment of the present utility model.

[0021] Figure 2 It is the transverse sectional view of the mine slope of the embodiment of the present utility model.

[0022] Figure 3 It is the detailed drawing of the water storage treatment tank of the embodiment of the present utility model.

[0023] Figure 4 It is the longitudinal sectional view at the end of the water flow platform of the embodiment of the present utility model.

[0024] In the figure: 1 - mine slope; 2 - grass cover; 3 - drainage ditch; 4 - water suction pipe; 5 - intercepting ditch; 6 - drainage canal; 7 - treatment area; 8 - sedimentation tank; 9 - water storage treatment tank; 10 - water flow platform; 11 - stable forest area; 12 - drain pipe; 13 - water inlet; 14 - water storage tank; 15 - central partition board; 16 - treatment tank; 17 - water outlet; 18 - silica nano-material layer I; 19 - iron oxide nano-material layer; 20 - silica nano-material layer II; 21 - bottom interconnection surface; 22 - side baffle; 23 - bottom plate; 24 - upper baffle; 25 - water flow baffle; 26 - drain pipe head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] As Figures 1 to 4As shown in the figure, a treatment system for the failure of phytoremediation caused by soil and water loss in metal mines. The system includes a grass cover 2, a drainage ditch 3, several water suction pipes 4, a cut-off ditch 5, a drainage canal 6 on the mine slope 1, a sedimentation tank 8, a water storage treatment tank 9, a flowing water platform 10 in the treatment area 7, and several drain pipes 12 in the stable forest area 11.

[0026] The drainage ditch 3 is connected to several water suction pipes 4; the cut-off ditch 5 is horizontally arranged on the drainage ditch 3, and the drainage canal 6 is arranged at the lower part of the bottom of the drainage ditch 3; the end of the drainage canal 6 is connected to the sedimentation tank 8, and the other side of the sedimentation tank 8 is connected to the water inlet 13 of the water storage treatment tank 9; the water outlet 17 of the water storage treatment tank 9 is connected to the flowing water platform 10, and the end of the flowing water platform 10 is connected to several drain pipes 12; the water storage treatment tank 9 includes a water storage tank 14 and a treatment tank 16 separated by a central partition 15; there is a gap between the bottom of the central partition 15 and the bottom of the tank, and this gap forms the bottom intercommunication surface 21 between the water storage tank 14 and the treatment tank 16; the treatment tank 16 is successively provided with a silicon dioxide nanomaterial layer I 18, an iron oxide nanomaterial layer 19, and a silicon dioxide nanomaterial layer II 20 from top to bottom.

[0027] Among them: the drainage ditch 3 is a vertical drainage ditch embedded in the soil body, and is connected to several water suction pipes 4 by means of oblique connection on both sides; several water suction pipes 4 are buried in the soil body. The water suction pipe 4 is connected to the drainage ditch 3 at an angle, so that the water collected by the water suction pipe 4 flows into the drainage ditch 3 without a level difference. The purpose of the drainage ditch 3 is to transport the water collected by the water suction pipe 4. The water suction pipe 4 is used to collect the moisture inside the soil surface layer, and silica gel water suction pipes, rubber water suction pipes, PVC water suction pipes, stainless steel water suction pipes, and nylon water suction pipes can be used.

[0028] The cut-off ditch 5 is used to stabilize the soil body and intercept water horizontally, and is a horizontal drainage ditch embedded in the soil body.

[0029] The drainage canal 6 is used to collect the water flowing into the drainage ditch 3, and is a drainage canal for collecting water at the central low place.

[0030] The sedimentation tank 8 is an open-air square tank, and its purpose is to preliminarily precipitate impurities in the water flowing in through the drainage canal 6.

[0031] The flowing water platform 10 is a multi-step platform with edges on both sides, and a bottom plate 23 is arranged at the bottom; one side of the bottom plate 23 is connected with a side baffle 22, and a water flow baffle 25 and an upper baffle 24 connected together are arranged at the end, and a drain pipe head 26 is arranged on the water flow baffle 25; the upper baffle 24 is connected with the side baffle 22. The purpose of setting the flowing water platform 10 is to slow down the flowing water potential energy of the water flowing into the treatment tank 16.

[0032] The drain pipe 12 is a split-type perforated drain pipe, with a hole spacing of 1 - 2 m, and is extended and arranged in the stable forest area 11, and its purpose is to discharge the water flowing into the flowing water platform 10 in a split manner.

[0033] The water storage and treatment pool 9 is circular, and the water storage pool 14 and the treatment pool 16 are both semi-circular pools. The water storage pool 14 is for collecting the water flowing in from the energy dissipation sedimentation tank 8; the treatment pool 16 is for treating the water collected and flowing in by the water storage pool 9.

[0034] A chemical precipitant is laid on the bottom of the water storage and treatment pool 9. The chemical precipitant is a natural and environmentally friendly material chemical precipitant, and its purpose is to remove heavy metal ions in water through adsorption or precipitation. Lime precipitant, phosphate precipitant, plant extract precipitant, activated carbon precipitant, etc. can be selected.

[0035] The water storage pool 14 is connected to the sedimentation tank 8; the treatment pool 16 is connected to the flowing water platform 10.

[0036] The purpose of using the silicon dioxide nanomaterial layer I 18, the iron oxide nanomaterial layer 19, and the silicon dioxide nanomaterial layer II 20 is to remove residual pollutants in water through blocking, adsorption and precipitation; the nanomaterial layers can be arranged in a multi-layer cross pattern. Embodiment

[0037] Taking a large-scale metal waste aluminum mine as an example, the whole is a sloping valley with a lower middle and higher sides. The local terrain on one side of the mine and the specific layout of the utility model are as Figure 1 shown.

[0038] A drainage ditch 3 connecting the water suction pipe 4 is arranged on the mine slope 1. Two intercepting ditches 5 are transversely arranged in the drainage ditch 3, a drainage channel 6 is arranged at the lower part of the bottom, a sedimentation tank 8 is arranged at the end of the drainage channel 6, the sedimentation tank 8 is connected to the water storage and treatment pool 9, the water storage and treatment pool 9 is connected to the flowing water platform 10, and a drain pipe 12 is connected at the end of the flowing water platform 10. The drain pipe 12 discharges the water into the stable forest area 11.

[0039] Among them: Seven drainage ditches 3 are arranged on each of the left and right slopes.

[0040] Two intercepting ditches 5 are arranged.

[0041] The sedimentation tank 8 is an open-air square pool with dimensions of 3*3*3m, and three are arranged continuously.

[0042] The water storage and treatment pool 9 is a circular pool with a depth of 15m and a diameter of 8m, including the water storage pool 14 and the treatment pool 16, which are separated in the middle, and the height of the bottom interconnection surface 21 is 1m.

[0043] Since this example is an aluminum mine, therefore, phosphate and activated carbon are used as the chemical precipitant and laid on the bottom of the water storage and treatment pool 9.

[0044] Three nanomaterial layers are arranged, specifically as Figure 3 shown. In the figure, the nanomaterial layers from top to bottom are the silicon dioxide nanomaterial layer I 18, the iron oxide nanomaterial layer 19, and the silicon dioxide nanomaterial layer II 20.

[0045] The flow table 10 is of a split-flow type, arranged in a stepped shape with three steps.

[0046] The drain pipe 12 is a 4-way split-flow perforated drain pipe.

[0047] Working principle:

[0048] The flowing water of rainfall in the soil is collected through the water suction pipe 4; it is collected into the drainage ditch 3 by relying on the inclined connection method and the self-flow potential due to its own weight; the intercepting ditch 5 collects the water flows formed on the soil surface during heavy rain and rainstorms, and together with the water flow in the water suction pipe 3, they flow into the drainage ditch 3, and the two jointly maintain the soil and water stability during the rainfall period. The drainage ditch 3 discharges the collected water flow into the drainage canal 6. The water flow in the drainage canal 6 undergoes energy dissipation and sedimentation of soil particles and their sundries through three sedimentation ponds 8. The water flowing out of the sedimentation pond 8 slowly flows into the reservoir 14 part of the water treatment pond 9, and reacts with the chemical precipitants laid on the bottom of the pond, so as to achieve the first heavy metal treatment. The water flow then enters the treatment pond 16 through the bottom interconnection surface 21 of the water treatment pond 9. According to the principle of communicating vessels and gravitational potential energy, the water flow rises in the treatment pond 16 and slowly passes through three nano-material layers to secondarily treat heavy metals and filter the generated sediment, thereby obtaining pollution-free clear water that can be directly discharged. Then, the clear water flowing out is subjected to energy dissipation and split-flow to the drain pipe 12 from the flow table 10, and finally slowly discharged in place in the stable forest area 11, so as to achieve the soil and water stability of the entire large-scale metal mine and the pollution-free treatment of the collected water flow. The pollution-free treatment includes pollution treatment and energy dissipation treatment.

Claims

1. A treatment system for the failure of phytoremediation caused by soil and water loss in metal mines, characterized in that: The system includes a grass cover (2), a drainage ditch (3), several water suction pipes (4), a catch ditch (5) and a drainage canal (6) provided on a mine slope (1), a sedimentation tank (8), a water storage and treatment tank (9) and a flowing water platform (10) provided in a treatment area (7), and several drain pipes (12) provided in a stable forest area (11); the drainage ditch (3) is connected to the several water suction pipes (4); the catch ditch (5) is horizontally provided on the drainage ditch (3), and the drainage canal (6) is provided at a lower position at the bottom of the drainage ditch (3); the end of the drainage canal (6) is connected to the sedimentation tank (8), and the other side of the sedimentation tank (8) is connected to an inlet (13) of the water storage and treatment tank (9); an outlet (17) of the water storage and treatment tank (9) is connected to the flowing water platform (10), and the end of the flowing water platform (10) is connected to the several drain pipes (12); the water storage and treatment tank (9) includes a water storage tank (14) and a treatment tank (16) separated by a central partition board (15); a gap is provided between the bottom of the central partition board (15) and the bottom of the tank, and the gap forms a bottom communication surface (21) between the water storage tank (14) and the treatment tank (16); the treatment tank (16) is successively provided with a silica nanomaterial layer I (18), an iron oxide nanomaterial layer (19), and a silica nanomaterial layer II (20) from top to bottom.

2. The treatment system for the failure of phytoremediation caused by soil and water loss in metal mines according to claim 1, wherein: The drainage ditch (3) is a vertically embedded drainage ditch in the soil body, and is connected to the several water suction pipes (4) by an inclined connection method on both sides; the several water suction pipes (4) are buried in the soil body.

3. A treatment system for the failure of phytoremediation caused by soil and water loss in metal mines according to claim 1, characterized in that: The catch ditch (5) is a horizontally embedded drainage ditch in the soil body.

4. A treatment system for the failure of phytoremediation caused by soil and water loss in metal mines according to claim 1, characterized in that: The drainage canal (6) is a collecting drainage ditch with a central low position.

5. A treatment system for the failure of phytoremediation caused by soil and water loss in metal mines according to claim 1, characterized in that: The sedimentation tank (8) is an open-air square tank.

6. The treatment system for the failure of phytoremediation caused by soil and water loss in metal mines according to claim 1, wherein: The flowing water platform (10) is a multi-step platform with edges on both sides, and a bottom plate (23) is provided at the bottom; a side baffle (22) is connected to one side of the bottom plate (23), and a water flow baffle (25) and an upper baffle (24) connected together are provided at the end, and a drain pipe head (26) is provided on the water flow baffle (25); the upper baffle (24) is connected to the side baffle (22).

7. A treatment system for the failure of phytoremediation caused by soil and water loss in metal mines according to claim 1, characterized in that: The drain pipe (12) is a split-type perforated drain pipe.

8. A treatment system for the failure of phytoremediation caused by soil and water loss in metal mines according to claim 1, characterized in that: The water storage and treatment tank (9) is circular, and both the water storage tank (14) and the treatment tank (16) are semi-circular tanks.

9. A treatment system for the failure of phytoremediation caused by soil and water loss in metal mines as described in claim 8, characterized in that: A chemical precipitant is laid on the bottom of the water storage and treatment tank (9).

10. The treatment system for the failure of phytoremediation caused by soil and water loss in metal mines as described in claim 8, characterized in that: The water storage tank (14) is connected to the sedimentation tank (8); the treatment tank (16) is connected to the flowing water platform (10).

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