CN210315414U - Ecological ditch for treating in-situ leaching liquor of ionic rare earth mine - Google Patents
Ecological ditch for treating in-situ leaching liquor of ionic rare earth mine Download PDFInfo
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- CN210315414U CN210315414U CN201821915036.2U CN201821915036U CN210315414U CN 210315414 U CN210315414 U CN 210315414U CN 201821915036 U CN201821915036 U CN 201821915036U CN 210315414 U CN210315414 U CN 210315414U
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Abstract
The utility model provides an ecological ditch for treating ion type rare earth mine in-situ leaching liquor, which comprises a multistage ecological percolation dam, a multistage drop dam and a plant canal; the multistage drop dam is arranged at the downstream of the multistage ecological percolation dam. The filter material in the dam body of the ecological infiltration dam of the ecological ditch of the utility model improves the pH value of river water, provides better habitat conditions for aquatic plants, covers the ecological cushion on the surface of the filter material, cultivates the aquatic plants on the ecological cushion, purifies sewage and reduces the ammonia nitrogen content; a multi-stage drop dam is arranged behind a percolation dam, pebbles are uniformly embedded on the surface of the drop dam for aeration and oxygenation, and then the drop dam enters a plant canal, and is subjected to plant absorption and microbial decomposition to further purify and restore the ecological environment in water, the ecological canal can effectively improve the pH value of wastewater, increase the oxygen content of water, degrade and adsorb ammonia nitrogen, reduce water and soil loss and intercept silt, and the retention time of the water in the canal can be prolonged due to the existence of plants to further remove and decompose the ammonia nitrogen.
Description
Technical Field
The utility model relates to an ion type tombarthite mine original place leaching solution river course water purification and ecological remediation field, concretely relates to administer the ecological irrigation canals and ditches of ion type tombarthite mine original place leaching solution.
Background
At present, ionic rare earth ore has three mining and dressing industries of pool leaching, heap leaching and in-situ ore leaching. Although the ion type rare earth ore in-situ leaching process is the most environment-friendly ion type rare earth mining mode at present, the environment problem caused by the ion type rare earth ore in-situ leaching process is serious, the ammonium sulfate solution soaks the mountain for a long time, earth surface vegetation can be damaged through lateral seepage and capillary action, and the ammonium sulfate remained in the mountain can pollute soil, surface water and underground water in a mining area and the surrounding environment through leaching action and seepage action. Wherein, the mineral leaching liquid enters the environment in a form of surface water drainage, which causes the surface water to have acid-bias water quality and high ammonia nitrogen content, the living environment of microorganisms, organisms and plants in the water is damaged, and the biological diversity is greatly reduced.
At present, an ecological ditch is mainly used for controlling non-point source pollution in a farmland ecosystem aiming at ammonia nitrogen polluted water with the pH value of the water in the range of 6-9, ion type rare earth mine wastewater has the characteristics of high ammonia nitrogen concentration, acidity and the like, and the traditional ecological ditch does not consider the treatment of the pH value of the water, the influence of the pH value on aquatic organisms and the ammonia nitrogen treatment effect.
Disclosure of Invention
The utility model aims to overcome the defects existing in the prior art and provide an ecological ditch for treating the in-situ leaching liquor of the ionic rare earth mine.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an ecological ditch for treating in-situ leaching leachate of an ionic rare earth mine, which comprises a multi-stage ecological percolation dam, a multi-stage drop dam and a vegetation ditch;
the multistage drop dam is arranged at the downstream of the multistage ecological percolation dam, and the plant canal is arranged at the downstream of the multistage drop dam;
the single-stage ecological infiltration dam comprises a dam body, a dam base and a gabion, wherein the dam base comprises an impermeable layer fixed on a riverbed and a first permeable wall and a second permeable wall which are vertically fixed on the impermeable layer, the permeable walls permeate water through holes, the dam body is arranged above the dam base and is divided into a front dam, a middle dam and a rear dam by two permeable walls;
the front dam is divided into four layers, namely a first filter material layer, a second filter material layer, a third filter material layer and a fourth filter material layer from outside to inside in sequence;
filling materials are filled in a middle dam between the two permeable walls, plants for absorbing ammonia nitrogen are planted on the upper surface of the filling materials of the middle dam, and the filling materials comprise corallite, clinoptilolite, biochar, lime and oxygen release substances;
the rear dam is filled with filter materials;
ecological mats are covered on the surfaces of the front dam and the rear dam of the single-stage ecological percolation dam, the ecological mats are water-permeable geomembranes, and aquatic plants are planted in the ecological mat cloth holes;
the surface of the drop dam is uniformly embedded with pebbles.
The ecological percolation dam has the water permeability characteristic, a polluted water body can enter the dam body, the pollution concentration is reduced, the pH of the water body is effectively improved by a filter material layer and the content of ammonia nitrogen in the water is reduced, and a biological film formed on the surface layer of the filter material can also effectively degrade pollutants; the ecological percolation dam forms a buffer zone at the upstream, prolongs the hydraulic retention time, promotes aquatic plants, algae and the like in the buffer zone of the ecological percolation dam to further adsorb and decompose pollutants in water, and ensures that silt in the water can be effectively settled in the buffer zone, thereby avoiding silting the downstream and providing required carbon elements for the downstream plants.
The drop dam can adjust the river flow state, build a certain landscape effect and improve the sensory property of the water body; the oxygen can be reoxygenated to promote the water flow and improve the content of dissolved oxygen in water, thereby degrading pollutants and enhancing the self-purification capacity of the water; the pebbles arranged on the surface of the drop dam are embedded, so that the aeration effect of river water can be enhanced, attachment points can be provided for bacteria, microorganisms and the like, a biological film is formed, and the ammonia nitrogen degradation effect is enhanced.
Preferably, the front dam and the rear dam of the single-stage ecological infiltration dam are covered with ecological mats on the upstream surface, the ecological mats are permeable geomembranes, and aquatic plants are planted in the ecological mats.
Preferably, the ecological mat is an aging-resistant, corrosion-resistant and water-permeable geomembrane.
Preferably, the plants planted in the ecological mat are aquatic plants for absorbing ammonia nitrogen.
Preferably, the water permeability coefficients of the first filter material layer, the second filter material layer, the third filter material layer and the fourth filter material layer are sequentially changed from small to big.
Preferably, the filter materials of the first filter material layer, the second filter material layer, the third filter material layer and the fourth filter material layer comprise corallite, clinoptilolite, biochar, lime and oxygen release substances, and the filter materials filled in the rear dam comprise corallite, clinoptilolite, biochar, lime and oxygen release substances.
Wherein, when the zeolite is in a low water level, part of the zeolite is exposed on the water surface, and after being exposed by the sun, ammonia nitrogen adsorbed by the zeolite turns to be anti-spit, so that the service time of the zeolite is prolonged; the addition of the sand and the stone can not only improve the pH value of the water body, but also prevent the lime from caking, increase the surface area of the lime contacting the water body and effectively improve the pH value of the water body; the biochar also plays a role in improving the pH value of the water body while providing a carbon source for the aquatic plants; the corallite has obvious effect on improving the pH value of the water body, the surface of the corallite is uneven, the corallite can provide propagation conditions for microorganisms in water, meanwhile, a biofilm is accelerated to be generated on the surface of the filler, the biological diversity is increased, and the overall ecological environment of the water body is improved.
Preferably, the plant canal is a strip-shaped plant canal transformed from a river channel, the plant canal comprises a first water level change strip-shaped plant canal, a first river bank shallow water strip-shaped plant canal, a running water point strip-shaped plant canal, a second river bank shallow water strip-shaped plant canal and a second water level change strip-shaped plant canal which are sequentially distributed from one side of a river bank to the other side of the river bank, and plants for absorbing ammonia nitrogen in the degradation water are planted in the strip-shaped plant canal.
More preferably, the plants planted in the plant ditch absorb and degrade ammonia nitrogen in water and have ornamental value.
Preferably, the first bank shallow water strip-shaped plant channel is alternately matched with fibrous root system aquatic plants and taproot system aquatic plants, and the second bank shallow water strip-shaped plant channel is alternately matched with fibrous root system aquatic plants and taproot system aquatic plants; the first water level change strip-shaped plant channel is used for alternately planting straight-root arbor plants with drought resistance and waterlogging resistance, straight-root shrub plants with drought resistance and waterlogging resistance and straight-root herbaceous plants with drought resistance and waterlogging resistance, and the second water level change strip-shaped plant channel is used for alternately planting straight-root arbor plants with drought resistance and waterlogging resistance, straight-root shrub plants with drought resistance and waterlogging resistance and straight-root herbaceous plants with drought resistance and waterlogging resistance; herbaceous plants are planted in the strip-shaped plant ditch at the running water.
The plant canal can achieve the purposes of improving water quality, reinforcing river banks and building landscape effects by using plants; aquatic plants with developed root systems are arranged in a shallow water area of the river bank of the plant channel in a crossed and staggered mode, so that pollutants can be adsorbed and degraded, and the river bank can be stabilized; herbaceous plants such as wild rice shoots are used for buffering water flow in running water, so that flood control and dike protection capabilities are improved; the arbor and shrub plants with developed root systems and landscape effects are planted above the water level change area, the wastewater of the leaching solution can be treated, and the landscape can be constructed.
More preferably, the plants planted in the strip-shaped plant ditch at the running water comprise: the shallow water strip-shaped plant ditch is planted with plants including reed, vetiver grass, yellow flag and thalictrum.
Building a multi-stage ecological infiltration dam at a source section where mining wastewater is converged into a river channel by adopting a mode of combining hydraulic engineering measures and ecological restoration, wherein a filter material in a dam body is used for improving the pH value of the river water and providing better habitat conditions for aquatic plants, an ecological cushion is covered on the surface of the filter material, holes are formed in an upper geotechnical cloth of the ecological cushion and aquatic plant seeds are put inwards, the aquatic plants are cultivated, the sewage is purified, and the content of ammonia nitrogen is reduced; a multi-stage drop dam is arranged behind a percolation dam, pebbles are uniformly embedded on the surface of the drop dam, aerated and oxygenated, and then the drop dam enters a plant canal composed of various aquatic plants and hydrophytes, river water slowly flows, and is absorbed by plants and decomposed by microorganisms, the ecological environment in water is further purified and restored, the ecological canal can effectively improve the pH value of waste water, increase the oxygen content of water, degrade and adsorb ammonia nitrogen, reduce water and soil loss and intercept silt, the retention time of the water in the canal can be prolonged due to the existence of the plants, a favorable growth environment is provided for the microorganisms, and the ammonia nitrogen is further removed and decomposed.
The pH value of the water body is improved through the neutralization effect of the alkaline filter material in the dam body of the multi-stage ecological percolation dam, and the content of ammonia nitrogen pollutants in the flood retention of the river water is absorbed and degraded by using filter material zeolite, an ecological pad and the like; secondly, improving the oxygen-containing condition of river water by utilizing the water storage, water dropping and aeration effects of the multistage water dropping dam, and promoting the absorption of ammonia nitrogen and the growth of aquatic plants in a downstream plant canal; and finally, reducing the ammonia nitrogen content of the river water by utilizing a large number of aquatic plants with ammonia nitrogen degradation and absorption functions in the plant canal, thereby achieving the effect of water quality treatment.
Preferably, the ecological mat is replaceable.
Preferably, the gabion is fixed to the river bed and is connected to the impervious layer of the dam foundation.
Preferably, the aperture ratio of the water flow cross section area when the aperture ratio of the permeable wall is not less than the maximum runoff of the river is compared with the area of the permeable wall, the first permeable wall is positioned between the front dam and the middle dam, the second permeable wall is positioned between the middle dam and the rear dam, the hole of the first permeable wall is positioned above the wall body of the first permeable wall, the hole of the second permeable wall is positioned below the wall body of the second permeable wall, and the upper end of the permeable wall is provided with an overflow port.
The porous wall is opened to facilitate river water to flow through ecological permeable dam and water storage before dam, and to increase water staying time and deposit suspended matter effectively. The filler enters the dam from an opening hole above the first permeable wall after being filtered layer by the front dam before passing through the preliminarily deposited river dam, the water flow direction is downward, and then the filler enters the rear dam from an opening hole below the second permeable wall.
Preferably, a support wall which is permeable to water is arranged between the permeable walls.
Preferably, the number of the drop dams is more than 4, the water depth of the drop dams is not more than 0.7m, the height difference of the drop dams is not less than 0.3m, the surface layer of the drop dam body adopts a C25 concrete structure, and the seepage-proofing grade is P6.
The biological canal adjusts the pH value of water quality by a chemical method, improves the oxygen-containing environment, creates a good habitat for the growth of aquatic plants in the plant canal, maintains water and soil, increases the hydraulic retention time, and can also degrade and remove ammonia nitrogen.
Preferably, the width of the ecological percolation dam is 2-3 m larger than the width of the river channel, the width of the drop dam is larger than the width of the river channel, and both sides of the dam body of the ecological percolation dam and the drop dam are embedded into the river bank and are backfilled and tamped.
Preferably, the length of the ecological infiltration dam is designed according to the amount of water to be treated, the quality of water, and the like, but is not less than 2 m.
Preferably, the plant canal is provided with a storage tank which can continuously and slowly release carbon and phosphorus nutrient elements required by plant growth.
Preferably, the width of the plant canal is consistent with that of the original river channel, and the design section of the plant canal is trapezoidal.
Preferably, the dam face of the ecological infiltration dam adopts a C20 specification, and reinforcing steel bars adopt Fy of 270N/mm2And Fy is 360N/mm2。
The beneficial effects of the utility model reside in that: the utility model provides an ecological ditch, which can solve the problems of surface water being acid and high ammonia nitrogen content caused by ionic rare earth ore leaching liquid of an in-situ leaching process; the problems that surface water is acid and high in ammonia nitrogen content and is not suitable for growth of microorganisms, organisms and plants can be solved; the problem that the ammonia nitrogen content of the surface water is too high and is not suitable for the growth of microorganisms, organisms and plants can be solved; can solve the problem of the loss of nutrient elements needed by plants in the leaching solution. The ecological ditch of the utility model can realize the adjustment of pH and oxygen-containing environment, which is favorable for removing ammonia nitrogen; the secondary pollution of the environment can be avoided by engineering and biological measures; when the mine wastewater is treated, engineering measures can effectively block and fix sand; the biological measures are beautiful and green and can absorb and treat ammonia nitrogen.
Drawings
Fig. 1 is a schematic view of an ecological infiltration dam according to an embodiment of the present invention.
Fig. 2 is a schematic view of an ecological ditch according to an embodiment of the present invention.
Fig. 3 is a top view of a raceway in accordance with an embodiment of the present invention.
Fig. 4 is a schematic view of an ecological infiltration dam according to an embodiment of the present invention.
Fig. 5 is a schematic view of an ecological infiltration dam according to an embodiment of the present invention.
The ecological water-level change dam comprises a rear dam 1, a middle dam 2, a middle dam 21, a filler layer 3, a front dam 31, a first filter material layer 32, a second filter material layer 33, a third filter material layer 34, a third filter material layer 4, an impermeable layer 5, a first permeable wall 6, a second permeable wall 7, a gabion 8, an ecological cushion 9, a support wall 10, a multistage ecological percolation dam 11, a multistage drop dam 12, a plant canal 121, a strip-shaped plant canal at a flowing water position 122, a shallow strip-shaped plant canal at a river bank 123, a water-level change strip-shaped plant canal 13 and a river bed.
Detailed Description
To better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific embodiments.
Example 1
As shown in fig. 2, the ecological ditch for treating the leaching solution of the ionic rare earth mine in-situ leaching ore, which is an embodiment of the present invention, comprises a multistage ecological percolation dam (10), a multistage drop dam (11) and a vegetation ditch (12);
the multistage drop dam (11) is arranged at the downstream of the multistage ecological percolation dam (10), and the vegetation channel (12) is arranged at the downstream of the multistage drop dam (12);
as shown in fig. 1, the single-stage ecological infiltration dam comprises a dam body, a dam foundation and a gabion (7), wherein the section of the dam body is trapezoidal, the dam foundation comprises an impermeable layer (4) fixed on a riverbed, and a first permeable wall (5) and a second permeable wall (6) which are vertically fixed on the impermeable layer, the permeable walls permeate water through holes, the dam body is arranged above the dam foundation, and the dam body is divided into a front dam (3), a middle dam (2) and a rear dam (1) by two permeable walls;
the front dam is divided into four layers, a first filter material layer (31), a second filter material layer (32), a third filter material layer (33) and a fourth filter material layer (34) are sequentially arranged from outside to inside, and interfaces of the filter material layers are vertically arranged in parallel;
filling materials are filled in the middle dam (2) between the two permeable walls to form a filling layer (21), plants for absorbing ammonia nitrogen are planted on the upper surface of the filling materials of the middle dam (2), and the filling materials comprise corallite, clinoptilolite, biochar, lime and oxygen release substances;
the rear dam (1) is filled with filter materials;
the surfaces of the front dam (3) and the rear dam (2) of the single-stage ecological percolation dam are covered with ecological mats (8), the ecological mats are water-permeable geomembranes, and aquatic plants are planted in ecological mat cloth holes;
pebbles are uniformly embedded on the surface of the drop dam;
the water permeability coefficients of the first filter material layer, the second filter material layer, the third filter material layer and the fourth filter material layer are sequentially changed from small to big;
the filter materials of the first filter material layer, the second filter material layer, the third filter material layer and the fourth filter material layer comprise corallite, clinoptilolite, biochar, lime and oxygen release substances, and the filter materials filled in the rear dam comprise corallite, clinoptilolite, biochar, lime and oxygen release substances;
as shown in fig. 3, the plant canal is a strip-shaped plant canal for modifying a river channel, the plant canal includes a first water level shifting strip-shaped plant canal, a first river bank shallow water strip-shaped plant canal, a running water point strip-shaped plant canal, a second river bank shallow water strip-shaped plant canal and a second water level shifting strip-shaped plant canal which are sequentially distributed from one side of a river bank to the other side of the river bank, and plants for absorbing and degrading ammonia nitrogen in water are planted in the strip-shaped plant canal;
the first bank shallow water strip-shaped plant channel is alternately matched with fibrous root system aquatic plants and taproot system aquatic plants, and the second bank shallow water strip-shaped plant channel is alternately matched with fibrous root system aquatic plants and taproot system aquatic plants; the first water level change strip-shaped plant channel is used for alternately planting straight-root arbor plants with drought resistance and waterlogging resistance, straight-root shrub plants with drought resistance and waterlogging resistance and straight-root herbaceous plants with drought resistance and waterlogging resistance, and the second water level change strip-shaped plant channel is used for alternately planting straight-root arbor plants with drought resistance and waterlogging resistance, straight-root shrub plants with drought resistance and waterlogging resistance and straight-root herbaceous plants with drought resistance and waterlogging resistance; herbaceous plant is planted to flowing water department bar plant canal, the plant that the bar plant canal was planted is for absorbing the plant of degrading the aquatic ammonia nitrogen and having ornamental value, the plant that the bar plant canal was planted of flowing water department includes: the plants planted in the shallow water strip-shaped plant ditch comprise reed, vetiver grass, yellow flag and thalictrum;
the gabion (7) is fixed on the riverbed and is connected with the impermeable layer (4) of the dam base;
the opening rate of the permeable wall is not less than the ratio of the water flow cross section area when the maximum runoff of a river to the area of the permeable wall, the first permeable wall is positioned between the front dam and the middle dam, the second permeable wall is positioned between the middle dam and the rear dam, the opening of the first permeable wall is positioned above the wall body of the first permeable wall, the opening of the second permeable wall is positioned below the wall body of the second permeable wall, and the upper end of the permeable wall is provided with an overflow port;
the number of the drop dams is more than 4, the water depth of the drop dam is not more than 0.7m, the height difference of the drop dams is not less than 0.3m, the surface layer of the drop dam body adopts a C25 concrete structure, and the seepage-proofing grade is P6;
the width of the ecological percolation dam is 2-3 m larger than that of a river channel, the width of the drop dam is larger than that of the river channel, and both sides of the dam body of the ecological percolation dam and the drop dam are embedded into a river bank, backfilled and tamped;
the length of the ecological percolation dam is designed according to the amount of water to be treated, the water quality and the like, but is not less than 2 m;
the plant channel is provided with a storage box which can continuously and slowly release carbon and phosphorus nutrient elements required by plant growth;
the width of the plant canal is consistent with that of the original river channel, and the section of the plant canal is designed to be trapezoidal;
the dam face of the ecological percolation dam adopts a C20 specification, and reinforcing steel bars adopt Fy which is 270N/mm2And Fy is 360N/mm2。
In addition, fig. 2 is only an illustration of the relative positions of the multistage ecological infiltration dam (10), the multistage drop dam (11) and the vegetation canal (12), and does not limit the number of the ecological infiltration dam and the drop dam.
Example 2
As the utility model discloses the ecological ditch of administering ion type rare earth mine in situ leaching solution, as shown in fig. 4, the only difference of the ecological ditch of this embodiment and the ecological ditch of embodiment 1 is that there is the difference in single-stage ecological infiltration dam, the position setting of the first permeable wall and the second permeable wall of single-stage ecological infiltration dam is in the position of the virtual plumb line of the extreme point on the base is gone up in crossing of trapezoidal single-stage ecological infiltration dam.
Example 3
As an ecological ditch for treating leaching solution of in-situ leaching of ionic rare earth mine in the embodiment of the utility model, as shown in FIG. 5, the only difference between the ecological ditch of the embodiment and the ecological ditch of the embodiment 1 is that a single-stage ecological percolation dam is different,
the front dam of the single-stage ecological percolation dam is divided into four layers, a first filter material layer (31), a second filter material layer (32), a third filter material layer (33) and a fourth filter material layer (34) are sequentially arranged from outside to inside, and the interfaces of the filter material layers are obliquely and parallelly arranged; the cross sections of the first filter material layer (31), the second filter material layer (32) and the third filter material layer (33) are parallelogram, and the cross section of the fourth filter material layer (34) is trapezoid or right triangle.
The filter material layer is arranged to ensure that all flowing water passes through the first filter material layer (31), the second filter material layer (32), the third filter material layer (33) and the fourth filter material layer (34) in sequence.
Example 4
As the utility model discloses an administer ecological irrigation canals and ditches of ion type rare earth mine original place leaching solution, the only difference of the ecological irrigation canals and ditches of this embodiment and the ecological irrigation canals and ditches of embodiment 1 is: the ecological ditch comprises a single-stage ecological infiltration dam (10) with 5-10 levels, a single-stage drop dam (11) with 5-10 levels and a plant ditch (12).
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. An ecological ditch for treating in-situ leaching leachate of an ionic rare earth mine is characterized in that the ecological ditch comprises a multi-stage ecological percolation dam, a multi-stage drop dam and a vegetation ditch;
the multistage drop dam is arranged at the downstream of the multistage ecological percolation dam, and the plant canal is arranged at the downstream of the multistage drop dam;
the single-stage ecological infiltration dam comprises a dam body, a dam base and a gabion, wherein the dam base comprises an impermeable layer fixed on a riverbed and a first permeable wall and a second permeable wall which are vertically fixed on the impermeable layer, the permeable walls permeate water through holes, the dam body is arranged above the dam base and is divided into a front dam, a middle dam and a rear dam by two permeable walls;
the front dam is divided into four layers, namely a first filter material layer, a second filter material layer, a third filter material layer and a fourth filter material layer from outside to inside in sequence;
filling materials are filled in a middle dam between the two permeable walls, plants for absorbing ammonia nitrogen are planted on the upper surface of the filling materials of the middle dam, and the filling materials are corallite, clinoptilolite, biochar, lime or oxygen release substances;
the rear dam is filled with filter materials;
ecological mats are covered on the surfaces of the front dam and the rear dam of the single-stage ecological percolation dam, the ecological mats are water-permeable geomembranes, and aquatic plants are planted in the ecological mat cloth holes;
the surface of the drop dam is uniformly embedded with pebbles.
2. The ecological ditch of claim 1, wherein the plants grown in the ecological mat are aquatic plants that absorb ammonia nitrogen.
3. The ecological ditch of claim 1, wherein the water permeability coefficients of the first filter material layer, the second filter material layer, the third filter material layer and the fourth filter material layer are sequentially increased from small to large.
4. The ecological ditch of claim 3, wherein the filter material of the first, second, third and fourth filter material layers is corallite, clinoptilolite, biochar, lime or oxygen-releasing material, and the filter material filled in the rear dam is corallite, clinoptilolite, biochar, lime or oxygen-releasing material.
5. The ecological ditch according to claim 4, wherein the plant canal is a strip-shaped plant canal for river channel improvement, the plant canal comprises a first water level shifting strip-shaped plant canal, a first river bank shallow water strip-shaped plant canal, a running water strip-shaped plant canal, a second river bank shallow water strip-shaped plant canal and a second water level shifting strip-shaped plant canal which are sequentially distributed from one side of a river bank to the other side of the river bank, and the strip-shaped plant canal is used for planting plants for absorbing and degrading ammonia nitrogen in water.
6. The ecological ditch according to claim 5, wherein the first bank shallow water strip-shaped plant channel is used for alternately planting fibrous root aquatic plants and taproot aquatic plants, and the second bank shallow water strip-shaped plant channel is used for alternately planting fibrous root aquatic plants and taproot aquatic plants;
the first water level change strip-shaped plant channel is used for alternately planting straight-root arbor plants with drought resistance and waterlogging resistance, straight-root shrub plants with drought resistance and waterlogging resistance and straight-root herbaceous plants with drought resistance and waterlogging resistance, and the second water level change strip-shaped plant channel is used for alternately planting straight-root arbor plants with drought resistance and waterlogging resistance, straight-root shrub plants with drought resistance and waterlogging resistance and straight-root herbaceous plants with drought resistance and waterlogging resistance;
herbaceous plants are planted in the strip-shaped plant ditch at the running water.
7. The ecological ditch of claim 5, wherein the gabion is fixed to the river bed and is connected to the impervious layer of the dam foundation.
8. The ecological ditch of claim 5, wherein the permeable wall has an opening ratio not smaller than a ratio of a water flow cross-sectional area at the maximum runoff rate of a river to an area of the permeable wall, the first permeable wall is located between the front dam and the middle dam, the second permeable wall is located between the middle dam and the rear dam, the first permeable wall is provided with an opening above the first permeable wall, the second permeable wall is provided with an opening below the second permeable wall, and an overflow port is provided at the upper end of the permeable wall.
9. The ecological ditch of claim 5, wherein water permeable support walls are disposed between the water permeable walls.
10. The ecological ditch according to claim 5, wherein the number of the drop dams is more than 4, the water depth of the drop dams is not more than 0.7m, the height difference of the drop dams is not less than 0.3m, the surface layer of the drop dam body adopts a C25 concrete structure, and the seepage-proofing grade is P6.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295927A (en) * | 2018-11-19 | 2019-02-01 | 广东中联兴环保科技有限公司 | A kind of ecological canal for administering ion type rareearth mine in_situ leaching leachate |
| CN113519229A (en) * | 2021-07-13 | 2021-10-22 | 中铝广西有色稀土开发有限公司 | Method for reclaiming and greening ionic rare earth mine area |
| CN114349299A (en) * | 2021-11-23 | 2022-04-15 | 河海大学 | Slope protection and method for filter-pressing, dehydrating, purifying and recycling bottom mud |
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2018
- 2018-11-19 CN CN201821915036.2U patent/CN210315414U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295927A (en) * | 2018-11-19 | 2019-02-01 | 广东中联兴环保科技有限公司 | A kind of ecological canal for administering ion type rareearth mine in_situ leaching leachate |
| CN113519229A (en) * | 2021-07-13 | 2021-10-22 | 中铝广西有色稀土开发有限公司 | Method for reclaiming and greening ionic rare earth mine area |
| CN113519229B (en) * | 2021-07-13 | 2022-11-29 | 中铝广西有色稀土开发有限公司 | Reclamation and greening method for ionic rare earth mining area |
| CN114349299A (en) * | 2021-11-23 | 2022-04-15 | 河海大学 | Slope protection and method for filter-pressing, dehydrating, purifying and recycling bottom mud |
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