Leachate treatment system for mining, dressing and smelting storage yard

Abstract

The leachate treatment system comprises a filtering area, a reaction area and a clear water area which are sequentially arranged, the reaction area is divided into a storage chamber, an adsorption chamber I and an adsorption chamber II through partition layers, and a plurality of conveying pipelines II are arranged on one side of the storage chamber and located in the partition layers. A plurality of net-shaped adsorption bags I are arranged in the adsorption chamber I, the conveying pipeline II is communicated with one side of the adsorption chamber I, a plurality of conveying pipelines III are arranged on the other side of the adsorption chamber I and located in the separation layer, a plurality of net-shaped adsorption bags II are arranged in the adsorption chamber II, and the conveying pipelines III are communicated with one side of the adsorption chamber II; a plurality of conveying pipelines IV are arranged on the other side of the adsorption chamber II in the separation layer and extend into one side of the clear water area. According to the utility model, the filtering area can effectively intercept harmful substances such as silt, heavy metal ions, organic pollutants and the like in the percolate of the tailing field; meanwhile, the in-situ purification of pollutants can be realized by filling the reaction area with a filler; and efficient interception and treatment of pollutants are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a leachate treatment system for mining and smelting stockpiles. Background Technology

[0002] Leachate treatment is a crucial aspect of the operation of mining and smelting stockpiles. Leachate typically contains various harmful substances and impurities, and its direct discharge without proper treatment will cause serious environmental pollution. Traditional leachate treatment methods often suffer from low efficiency, poor treatment results, and high operating costs. Therefore, developing a highly efficient, economical, and environmentally friendly leachate treatment system is of paramount importance.

[0003] Most existing leachate treatment technologies employ single filtration or adsorption methods, making it difficult to effectively remove multiple contaminants from leachate. Furthermore, these technologies often lack flexibility and adjustability during the treatment process, failing to provide targeted treatment based on the specific pollution levels of the leachate. In addition, traditional treatment systems often neglect the synergistic effects between different treatment units, resulting in low overall treatment efficiency.

[0004] To address the aforementioned problems, this invention proposes a novel leachate treatment system for mining and smelting stockpiles. This system effectively removes multiple pollutants from the leachate through the rational layout and combination of different treatment units. Furthermore, the system possesses high flexibility and adjustability, enabling targeted treatment based on the actual pollution levels of the leachate. In addition, by optimizing the synergistic effect between the various treatment units, overall treatment efficiency is improved, and operating costs are reduced. Utility Model Content

[0005] This invention provides a leachate treatment system for mining and smelting stockpiles to solve the problems existing in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A leachate treatment system for a mining and smelting stockpile includes a filtration zone, a reaction zone, and a clear water zone arranged from left to right. The filtration zone comprises, from left to right, a quartz sand layer, a zeolite layer, and a composite layer of activated carbon and quartz sand. Between the filtration zone and the reaction zone, from left to right, are a crushed rock layer and a cement mortar-crushed stone concrete layer. Several conveying pipes I are arranged from bottom to top on the cement mortar-crushed stone concrete layer. The reaction zone is divided from left to right into a storage chamber, an adsorption chamber I, and an adsorption chamber II by a partition layer. The conveying pipes I are connected to one side of the storage chamber. On the other side of the storage chamber, within the partition layer, several conveying pipes II are arranged sequentially from bottom to top. Several mesh adsorption bags I are arranged inside the adsorption chamber I. The conveying pipes II are connected to one side of the adsorption chamber I. On the other side of the adsorption chamber I, within the partition layer, several conveying pipes III are arranged sequentially from bottom to top. Several mesh adsorption bags II are arranged inside the adsorption chamber II. The conveying pipes III are connected to one side of the adsorption chamber II. On the other side of the adsorption chamber II, within the partition layer, several conveying pipes IV are arranged sequentially from bottom to top. The conveying pipes IV extend into the clear water zone.

[0008] Preferably, each of the conveying pipes I, II, III, and IV is equipped with an electric flow regulating valve at its right end, and each of them is equipped with an electromagnetic flow meter.

[0009] Preferably, the storage chamber and the clean water area are equipped with pressure-type water level sensors.

[0010] Preferably, aeration heads are respectively provided in the adsorption chamber I and adsorption chamber II and at the bottom of the mesh adsorption bag I and mesh adsorption bag II.

[0011] Preferably, the aeration head is connected to an air flow meter via a pipeline, and the air flow meter is connected to an air pump via a pipeline.

[0012] Preferably, the mesh adsorption bag I and the mesh adsorption bag II can be freely filled with filler material.

[0013] Preferably, the storage chamber, adsorption chamber I, adsorption chamber II, and clear water zone are each equipped with a monitoring port. The monitoring port is connected to a water flow meter via a pipe, the water flow meter is connected to a water pump via a pipe, and the water pump is electrically connected to an online monitor.

[0014] Preferably, the electromagnetic flow meter, electric flow regulating valve, air flow meter, pressure water level sensor, and water pump are all connected to a controller.

[0015] Preferably, each of the quartz sand layer, zeolite layer, and activated carbon-quartz sand composite layer is separated by two layers of non-woven polyester fiber geotextile and one layer of iron mesh, with the iron mesh located between the two layers of non-woven polyester fiber geotextile.

[0016] Preferably, a cement mortar and crushed stone concrete layer is provided on the other side of the clear water zone, and a number of conveying pipes V are arranged sequentially from bottom to top in the cement mortar and crushed stone concrete layer. Each conveying pipe V is equipped with an electric flow regulating valve at the end away from the clear water zone.

[0017] This utility model has the following beneficial effects:

[0018] (1) The leachate treatment system of this utility model can effectively intercept harmful substances such as mud, heavy metal ions and organic pollutants in tailings leachate through the set filtration zone, and reduce their migration and diffusion to the downstream environment; at the same time, the reaction zone can achieve in-situ purification of pollutants by filling functional materials or microorganisms with adsorption, precipitation or chemical reaction capabilities; thereby achieving efficient interception and treatment of pollutants.

[0019] (2) By deploying controllers and online monitors, the entire leachate treatment system can achieve intelligent and automated treatment modes based on real-time changes in parameters such as leachate flow rate and pollutant type.

[0020] (3) The mesh carrier is used to hold the filler. When the adsorbent material or microorganisms reach saturation or the service life expires, the filler can be replaced directly by taking out the mesh carrier. The operation is simple and saves maintenance costs.

[0021] (4) The formulation of filler can be adjusted according to different types and concentrations of pollutants to achieve targeted treatment effects. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0024] In the diagram, 1-filtration zone, 2-reaction zone, 3-clear water zone, 4-quartz sand layer, 5-zeolite layer, 6-activated carbon and quartz sand composite layer, 7-crushed rock layer, 8-cement mortar and crushed stone concrete layer, 9-transportation pipe I, 10-separation layer, 11-storage chamber, 12-adsorption chamber I, 13-adsorption chamber II, 14-transportation pipe II, 15-mesh adsorption bag I, 16-transportation pipe III, 17-mesh adsorption bag II, 18-transportation pipe IV, 19-electric flow regulating valve, 20-electromagnetic flow meter, 21-pressure water level sensor, 22-aeration head, 23-air flow meter, 24-air pump, 25-monitoring port, 26-water flow meter, 27-water pump, 28-online monitor, 29-controller, 30-nonwoven polyester fiber geotextile, 31-iron mesh, 32-transportation pipe V. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] A leachate treatment system for mining and smelting stockpiles, as shown in the attached... Figure 1-2 As shown, the system includes a filtration zone 1, a reaction zone 2, and a clear water zone 3 arranged from left to right. The filtration zone 1 includes, from left to right, a quartz sand layer 4, a zeolite layer 5, and a composite layer of activated carbon and quartz sand 6. Between the filtration zone 1 and the reaction zone 2, from left to right, is a crushed rock layer 7 and a cement mortar-crushed stone concrete layer 8. The cement mortar-crushed stone concrete layer 8 has several conveying pipes I 9 arranged from bottom to top. The reaction zone 2 is divided from left to right into a storage chamber 11, an adsorption chamber I 12, and an adsorption chamber II 13 by a partition layer 10. The conveying pipes I 9 are connected to one side of the storage chamber 11, and the other side of the storage chamber 11 is located in the... A plurality of conveying pipes II14 are arranged sequentially from bottom to top within the partition layer 10. A plurality of mesh adsorption bags I15 are arranged within the adsorption chamber I12. The conveying pipes II14 are connected to one side of the adsorption chamber I12. On the other side of the adsorption chamber I12, a plurality of conveying pipes III16 are arranged sequentially from bottom to top within the partition layer 10. A plurality of mesh adsorption bags II17 are arranged within the adsorption chamber II13. The conveying pipes III16 are connected to one side of the adsorption chamber II13. On the other side of the adsorption chamber II13, a plurality of conveying pipes IV18 are arranged sequentially from bottom to top within the partition layer 10. The conveying pipes IV18 extend into one side of the clear water zone 3.

[0027] Furthermore, in order to monitor and adjust the leachate flow rate in real time, electric flow regulating valves 19 are installed at the right ends of the conveying pipes I 9, II 14, III 16, and IV 18, and electromagnetic flow meters 20 are installed on each of them.

[0028] Furthermore, in order to monitor water level changes in real time and prevent overflow or drying up, pressure-type water level sensors 21 are installed in the storage chamber 11 and the clear water area 3.

[0029] Furthermore, in order to enhance the uniformity and efficiency of the reaction, aeration heads 22 are respectively provided at the bottom of the adsorption chamber I 12 and adsorption chamber II 13 and the mesh adsorption bag I 15 and mesh adsorption bag II 17. The aeration heads 22 are connected to an air flow meter 23 through a pipeline, and the air flow meter 23 is connected to an air pump 24 through a pipeline.

[0030] Specifically, the mesh adsorption bag I 15 and mesh adsorption bag II 17 can be freely filled with filler materials. For mesh adsorption bag I 15, the filler materials can be selected such as microbial carriers, heavy metal adsorbents, organic matter removal agents, etc. For mesh adsorption bag II 17, the filler materials can be selected and added according to the type and concentration of pollutants. At the same time, this setting also facilitates the replacement of filler materials.

[0031] Furthermore, in order to analyze the leachate pollutant removal effect in real time and adjust the flow rate of the entire system in real time, and adapt to the fluctuation of leachate volume under different rainfall conditions, thereby improving the system's operating efficiency and stability, the storage chamber 11, adsorption chamber I 12, adsorption chamber II 13, and clear water zone 3 are each equipped with a monitoring port 25. The monitoring port 25 is connected to a water flow meter 26 through a pipe. The water flow meter 26 is connected to a water pump 27 through a pipe. The water pump 27 is electrically connected to an online monitor 28. The electromagnetic flow meter 20, electric flow regulating valve 19, air flow meter 23, pressure water level sensor 21, water pump 27, and air pump 24 are connected to a controller 29, which is a PLC.

[0032] Furthermore, to effectively prevent material mixing and enhance structural stability, each of the quartz sand layer 4, zeolite layer 5, and activated carbon and quartz sand composite layer 6 is separated by two layers of non-woven polyester fiber geotextile 30 and one layer of iron mesh 31, with the iron mesh 31 located between the two layers of non-woven polyester fiber geotextile 30.

[0033] Specifically, in order to facilitate the discharge of treated leachate, a cement mortar and crushed stone concrete layer 8 is provided on the other side of the clear water zone 3. Several conveying pipes V32 are arranged sequentially from bottom to top on the cement mortar and crushed stone concrete layer 8. An electric flow regulating valve 19 is installed at the end of the conveying pipes V32 away from the clear water zone 3.

[0034] Working principle

[0035] As attached Figure 1-2As shown, the leachate first flows through the quartz sand layer 4, which effectively intercepts large particles of silt. It then enters the zeolite layer 5, further intercepting small particles of silt and utilizing the adsorption capacity of the zeolite material to partially remove heavy metals and organic matter from the leachate. Finally, it flows through the activated carbon and quartz sand composite layer 6, achieving further interception of residual fine particles and enhancing the adsorption and degradation of heavy metals and organic matter. Next, it enters the crushed rock layer 7 as a transition layer for primary sedimentation and homogenization. Further, the leachate is transported to the storage chamber 11 via the conveying pipe I 9 installed on the cement mortar crushed stone concrete layer 8 for storage. The concentration of pollutants in the leachate is monitored by an online monitor 28, and the influent concentration is adjusted by a PLC combined with an electric flow regulating valve 19 and an electromagnetic flow meter 20. Finally, the leachate is transported through the conveying pipe II 14... The leachate is sent to adsorption chamber I12, where the flow rate and residence time are controlled by a PLC combined with an electric flow regulating valve 19 and an electromagnetic flow meter 20 to ensure full contact with the added packing material. Simultaneously, air pump 24 aerates the bottom to enhance the uniformity and efficiency of the reaction. Further, the leachate is transported to adsorption chamber II13 via conveying pipe III16. After flowing into adsorption chamber II13, the leachate undergoes final purification treatment using a PLC combined with an electric flow regulating valve 19 and an electromagnetic flow meter 20. Depending on the type and concentration of pollutants, additional packing material is selected to ensure that the pollutant concentration meets discharge or reuse standards. The treated leachate is then transported to clear water zone 3 via conveying pipe IV18. The water quality in this zone meets the company's discharge or reuse standards and can be used for various purposes such as industrial recycling, agricultural irrigation, or landscaping. Finally, the leachate is discharged via conveying pipe V32.

Claims

1. A leachate treatment system for mining and smelting stockpiles, characterized in that, The system includes a filtration zone (1), a reaction zone (2), and a clear water zone (3) arranged from left to right. The filtration zone (1) includes a quartz sand layer (4), a zeolite layer (5), and an activated carbon and quartz sand composite layer (6) arranged from left to right. Between the filtration zone (1) and the reaction zone (2), a crushed rock layer (7) and a cement mortar crushed stone concrete layer (8) are arranged from left to right. Several conveying pipes I (9) are arranged from bottom to top in the cement mortar crushed stone concrete layer (8). The reaction zone (2) is divided from left to right into a storage chamber (11), an adsorption chamber I (12), and an adsorption chamber II (13) by a partition layer (10). The conveying pipes I (9) are connected to one side of the storage chamber (11), and the other side of the storage chamber (11) is located... A number of conveying pipes II (14) are arranged sequentially from bottom to top in the partition layer (10). A number of mesh adsorption bags I (15) are arranged in the adsorption chamber I (12). The conveying pipes II (14) are connected to one side of the adsorption chamber I (12). A number of conveying pipes III (16) are arranged sequentially from bottom to top in the partition layer (10) on the other side of the adsorption chamber I (12). A number of mesh adsorption bags II (17) are arranged in the adsorption chamber II (13). The conveying pipes III (16) are connected to one side of the adsorption chamber II (13). A number of conveying pipes IV (18) are arranged sequentially from bottom to top in the partition layer (10) on the other side of the adsorption chamber II (13). The conveying pipes IV (18) extend into one side of the clear water zone (3).

2. The leachate treatment system for mining and beneficiation stockpiles according to claim 1, characterized in that, Electric flow regulating valves (19) are installed at the right ends of the conveying pipes I (9), II (14), III (16), and IV (18), and electromagnetic flow meters (20) are installed on them.

3. The leachate treatment system for mining and beneficiation stockpiles according to claim 1, characterized in that, The storage chamber (11) and the clear water area (3) are equipped with pressure-type water level sensors (21).

4. The leachate treatment system for mining and beneficiation stockpiles according to claim 1, characterized in that, Aeration heads (22) are respectively provided in the adsorption chamber I (12) and adsorption chamber II (13) and at the bottom of the mesh adsorption bag I (15) and mesh adsorption bag II (17).

5. The leachate treatment system for mining and beneficiation stockpiles according to claim 4, characterized in that, The aeration head (22) is connected to an air flow meter (23) via a pipeline, and the air flow meter (23) is connected to an air pump (24) via a pipeline.

6. The leachate treatment system for mining and beneficiation stockpiles according to claim 1, characterized in that, The mesh adsorption bag I (15) and mesh adsorption bag II (17) can be freely filled with filler material.

7. The leachate treatment system for mining and beneficiation stockpiles according to claim 1, characterized in that, The storage chamber (11), adsorption chamber I (12), adsorption chamber II (13), and clear water zone (3) are each equipped with a monitoring port (25). The monitoring port (25) is connected to a water flow meter (26) through a pipe. The water flow meter (26) is connected to a water pump (27) through a pipe. The water pump (27) is electrically connected to an online monitor (28).

8. The leachate treatment system for mining and beneficiation stockpiles according to any one of claims 1 to 7, characterized in that, Electromagnetic flow meter (20), electric flow regulating valve (19), air flow meter (23), pressure water level sensor (21), water pump (27), and air pump (24) are all connected to controller (29).

9. The leachate treatment system for mining and beneficiation stockpiles according to claim 1, characterized in that, The quartz sand layer (4), zeolite layer (5), and activated carbon and quartz sand composite layer (6) are separated by two layers of non-woven polyester fiber geotextile (30) and one layer of iron mesh (31), with the iron mesh (31) located between the two layers of non-woven polyester fiber geotextile (30).

10. The leachate treatment system for mining and beneficiation stockpiles according to claim 1, characterized in that, On the other side of the clear water zone (3), a cement mortar crushed stone concrete layer (8) is provided. Several conveying pipes V (32) are arranged from bottom to top on the cement mortar crushed stone concrete layer (8). Electric flow regulating valves (19) are installed at the end of the conveying pipes V (32) away from the clear water zone (3).

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