Underground water monitoring device for red mud storage yard

Abstract

The utility model provides an underground water monitoring device for a red mud storage yard. The underground water monitoring device comprises a monitoring well body; the monitoring well body comprises a monitoring well and an underground water sampling pipe; the monitoring well is of a hollow annular structure; the underground water sampling pipe is vertically arranged in the hollow part of the monitoring well, and a plurality of water inlet holes are distributed in the pipe wall of the lower part of the underground water sampling pipe; a plurality of sensors for monitoring underground water quality are arranged in the underground water sampling pipe; and a filter layer is filled between the outer wall of the underground water sampling pipe and the inner wall of the monitoring well body. According to the utility model, the plurality of sensors are arranged in the underground water sampling pipe, so that the purpose of online monitoring and analyzing the underground water quality of the red mud storage yard is achieved; through regular sampling in the underground water sampling pipe, the purpose of regular sampling analysis of the underground water of the red mud storage yard is achieved, and the accuracy and timeliness of monitoring data can be ensured by combining online monitoring and regular sampling analysis.

Description

Technical Field

[0001] This utility model relates to the field of groundwater monitoring, specifically to a groundwater monitoring device for red mud dump sites. Background Technology

[0002] Red mud dumps are sites used to store red mud, a waste product generated during bauxite smelting. Red mud is a reddish-brown, muddy waste, primarily composed of slag produced during alumina production. Due to its high water content and the large amount of alkaline and harmful substances in its leachate, direct leakage into the environment can cause serious pollution to soil and water bodies. Groundwater is a vital water source for human production and daily life; ensuring its safety through monitoring is crucial for protecting human health. Therefore, monitoring through underground wells can promptly detect changes in groundwater quality, providing early warning of potential pollution risks from red mud dumps and offering a scientific basis for developing targeted prevention and control measures.

[0003] Currently, groundwater monitoring methods are still mainly manual, with outdated sampling equipment and a lack of intelligent and automated monitoring devices. This not only limits the frequency and density of monitoring but may also affect the accuracy and timeliness of monitoring data. Utility Model Content

[0004] This invention provides a groundwater monitoring device for red mud dump sites to solve the defects of inaccurate and untimely groundwater monitoring data in the prior art.

[0005] A groundwater monitoring device for red mud dump sites includes: a monitoring well body; the monitoring well body includes: a monitoring well and a groundwater sampling pipe;

[0006] The monitoring well has a hollow ring structure; the groundwater sampling pipe is vertically installed in the hollow part of the monitoring well, and several water inlet holes are distributed on the lower part of the pipe wall of the groundwater sampling pipe; several sensors for monitoring groundwater quality are installed inside the groundwater sampling pipe.

[0007] A filter layer is filled between the outer wall of the groundwater sampling pipe and the inner wall of the monitoring well.

[0008] Furthermore, in the groundwater monitoring device for red mud dump sites as described above, the sensors include: a pH sensor, a conductivity sensor, a turbidity sensor, a dissolved oxygen sensor, a heavy metal sensor, and a fluoride sensor.

[0009] Furthermore, in the groundwater monitoring device for red mud dump sites as described above, the filter layer comprises: from bottom to top, a first quartz sand layer, a second quartz sand layer, and a clay layer;

[0010] The particle diameter of the first quartz sand layer is larger than that of the second quartz sand layer, and the particle diameter of the second quartz sand layer is larger than that of the clay layer.

[0011] The first quartz sand layer is distributed in the area where the several water inlets are located.

[0012] Furthermore, in the groundwater monitoring device for red mud dump sites as described above, a sleeve is fitted at the upper opening of the groundwater sampling pipe, the bottom of the sleeve is fixed by poured concrete, and its top opening is higher than the opening of the groundwater sampling pipe.

[0013] A cover plate is provided at the upper opening of the sleeve. The cover plate is movably connected to the sleeve by a hinge. On the opposite side of the hinge, a latch is provided to fix the cover plate and the sleeve.

[0014] Furthermore, in the groundwater monitoring device for the red mud dump site described above, the plurality of water inlets are distributed in a quincunx pattern at the bottom of the groundwater sampling pipe.

[0015] Furthermore, in the groundwater monitoring device for red mud dump sites described above, the outer wall of the groundwater sampling pipe, in the area where the water inlet holes are distributed, is wrapped with non-woven fabric.

[0016] Furthermore, in the groundwater monitoring device for the red mud dump site described above, a warning post is fixed around the casing, and the bottom of the warning post is fixed by the poured concrete.

[0017] Furthermore, in the groundwater monitoring device for red mud dump sites described above, the diameter of the inlet hole is 8mm-10mm.

[0018] Furthermore, the groundwater monitoring device for the red mud dump site as described above also includes a control well, which is located upstream of the red mud dump site, and several monitoring wells are located downstream of the red mud dump site.

[0019] The groundwater monitoring device for red mud dump sites provided by this utility model achieves the purpose of online monitoring and analysis of groundwater quality in red mud dump sites by setting up several sensors in the groundwater sampling pipe and transmitting the detected data to a remote processor for analysis. At the same time, by periodically sampling in the groundwater sampling pipe, the purpose of periodic sampling and analysis of groundwater in red mud dump sites is achieved, thus enabling the combination of online monitoring and periodic sampling and analysis to ensure the accuracy and timeliness of monitoring data. Attached Figure Description

[0020] Figure 1 The groundwater monitoring device for red mud dump sites provided by this utility model;

[0021] Figure 2 Top view of the monitoring well body;

[0022] Figure 3 for Figure 1 AA-direction cross section;

[0023] Figure label:

[0024] 1-Monitoring well; 2-Groundwater sampling pipe; 21-Inlet hole; 3-First quartz sand layer; 4-Second quartz sand layer; 5-Clay layer; 6-Concrete; 7-Warning post; 8-; 9-Cover plate; 10-Hinge; 11-Lock. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Figure 1 The groundwater monitoring device for red mud dump sites provided by this utility model, such as Figure 1 As shown, 1. A groundwater monitoring device for a red mud dump site, comprising: a monitoring well body; the monitoring well body includes: a monitoring well 1 and a groundwater sampling pipe 2; the monitoring well 1 is a hollow annular structure; the groundwater sampling pipe 2 is vertically installed in the hollow part of the monitoring well 1, and a plurality of water inlet holes 21 are distributed on the lower part of the pipe wall of the groundwater sampling pipe 2; a plurality of sensors for monitoring groundwater quality are installed inside the groundwater sampling pipe 2; a filter layer is filled between the outer wall of the groundwater sampling pipe 2 and the inner wall of the monitoring well body 1.

[0027] Specifically, the monitoring device of this utility model system can employ a combination of online monitoring and periodic sampling and analysis to ensure the accuracy and timeliness of the monitoring data. Specifically, groundwater from the red mud dump gradually permeates through the filter layer between the groundwater sampling pipe 2 and the monitoring well, and finally enters the groundwater sampling pipe 2 through several inlet holes 21 located at the bottom. Different sensors installed within the groundwater sampling pipe 2 then detect the groundwater quality and transmit the specific values ​​to a remote processor. The remote processor analyzes the groundwater in the red mud dump based on the data detected by the different sensors, thus achieving the purpose of online monitoring. Furthermore, periodic sampling and analysis of the groundwater quality can also be achieved by periodically taking samples from the groundwater sampling pipe 2 and then analyzing the samples in a laboratory. In this embodiment, the groundwater sampling pipe 2 is made of high-molecular-weight polyethylene material.

[0028] This application provides early warning of potential groundwater pollution risks by analyzing changes in groundwater quality. Furthermore, the monitoring data can provide effective decision-making support for the rational development, comprehensive management, and protection of groundwater resources. For example, during wet and dry seasons, the monitoring frequency and density can be adjusted based on the data to address environmental risks at different times. Groundwater well monitoring data can also be used to assess the risk level of red mud dumps to the groundwater environment, providing a scientific basis for developing targeted prevention and control measures.

[0029] The groundwater monitoring device for red mud dump sites provided by this utility model achieves online monitoring and analysis of groundwater quality at red mud dump sites by installing several sensors inside a groundwater sampling pipe and transmitting the detected data to a remote processor for analysis. Simultaneously, by periodically sampling the groundwater inside the sampling pipe, it achieves the goal of periodic sampling and analysis of groundwater at red mud dump sites. This allows for the combination of online monitoring and periodic sampling and analysis to ensure the accuracy and timeliness of the monitoring data. Furthermore, this application improves the accuracy of groundwater monitoring data at red mud dump sites by using several sensors to detect water quality within the sampling pipe. On the other hand, it enables timely detection of changes in groundwater quality at red mud dump sites, allowing for timely early warning and preventing further expansion of groundwater pollution at the red mud dump sites.

[0030] Furthermore, the sensors may specifically include: pH sensor, conductivity sensor, turbidity sensor, dissolved oxygen sensor, heavy metal sensor, and fluoride sensor.

[0031] Specifically, red mud and its accompanying liquid have high alkalinity. If no anti-seepage measures are taken at the red mud dump, the highly alkaline wastewater will directly seep into the ground, leading to increased groundwater alkalinity and total hardness. For example, the total hardness of groundwater near the red mud dump may exceed the standard by several times, and the pH value may also be far beyond the normal range. In addition, fluorides from bauxite will enter the red mud during the alumina production process and seep into the ground in the red mud dump, causing water pollution. Red mud may also contain other harmful substances, such as heavy metals, chemicals, and toxic substances. Once these substances seep into the ground, they will seriously affect the quality of groundwater. Therefore, this application uses sensors such as pH, conductivity, turbidity, dissolved oxygen, heavy metals, and fluoride sensors installed in the groundwater sampling pipe 2 to comprehensively monitor the groundwater quality at the red mud dump, thereby further improving the accuracy of the monitoring data.

[0032] Furthermore, the filter layer includes, from bottom to top, a first quartz sand layer 3, a second quartz sand layer 4, and a clay layer 5; the particle diameter of the first quartz sand layer 3 is larger than that of the second quartz sand layer 4, and the particle diameter of the second quartz sand layer 4 is larger than that of the clay layer 5; and the first quartz sand layer 3 is distributed in the area where several water inlet holes 21 are located.

[0033] Specifically, to ensure that groundwater can smoothly infiltrate from the inlet hole into the groundwater sampling pipe without blockage, this application lays a first layer of quartz sand near the inlet hole 2. Simultaneously, to prevent the groundwater sampling pipe 2 from tilting or even breaking underground due to geological reasons, a second layer of quartz sand 4 and a clay layer 5 are laid on top of the first layer of quartz sand 3. The successive decrease in particle size of the second layer of quartz sand 4 and the clay layer 5 ensures that the groundwater sampling pipe 2 can be stably fixed underground.

[0034] Furthermore, a sleeve 8 is fitted at the upper opening of the groundwater sampling pipe 2; the bottom of the sleeve 8 is fixed by the poured concrete 6, and its top opening is higher than the opening of the groundwater sampling pipe 2; a cover plate 9 is provided at the upper opening of the sleeve 8, and the cover plate 9 is movably connected to the sleeve 8 by a hinge 10. On the opposite side of the hinge 10, a latch 11 is provided for fixing the cover plate 9 and the sleeve 8.

[0035] Specifically, the sleeve 8 is made of stainless steel. On the one hand, it is used to protect the upper end of the groundwater sampling pipe 2 from damage. On the other hand, in order to protect the water quality inside the groundwater sampling pipe 2 from external influences, the opening at the top is sealed by the cooperation of the cover plate 9 and the latch 11.

[0036] The groundwater monitoring device for red mud dump sites provided in this application effectively protects the water quality inside the groundwater sampling pipe from external interference by setting a sleeve 8 at the opening of the groundwater sampling pipe 2, thereby effectively improving the accuracy of water quality monitoring.

[0037] Furthermore, Figure 3 for Figure 1 AA-direction cross-section, as shown Figure 1 , Figure 3 As shown, several water inlet holes 21 are arranged in a quincunx pattern below the groundwater sampling pipe 2.

[0038] Specifically, the quincunx layout allows for the placement of more inlet holes within a limited sampling tube area, thereby improving the efficiency of groundwater sampling. This layout ensures that the inlet holes are more evenly distributed across the sampling tube, guaranteeing more comprehensive groundwater collection during sampling. Furthermore, the moderate spacing between the inlet holes in the quincunx layout ensures balanced water flow, avoiding areas that are too densely or sparsely distributed. This uniform distribution helps ensure sampling accuracy and reduces sampling errors caused by uneven water flow.

[0039] The groundwater monitoring device for red mud dump sites provided in this application further improves the accuracy of water quality sampling by designing the water inlet holes in a quincunx pattern.

[0040] Furthermore, the area on the outer wall of the groundwater sampling pipe 2, where the inlet holes 21 are distributed, is wrapped with non-woven fabric.

[0041] Specifically, non-woven fabric has excellent filtration properties, effectively blocking large particles, soil particles, and other impurities from entering the sampling tube. This helps keep the sampling tube unobstructed, preventing sampling failures or errors caused by blockages. Simultaneously, it protects the sampling tube from external environmental corrosion, extending its service life. Furthermore, water purity is crucial for subsequent analysis and testing results when sampling groundwater. Wrapping the sample with non-woven fabric reduces external contamination, such as dust and microorganisms. This helps ensure the representativeness of the collected water sample, accurately reflecting the groundwater quality.

[0042] Furthermore, Figure 2 To monitor the top view of the well body, such as Figure 2 As shown, this application has a warning post 7 fixed around the sleeve 8, and the bottom of the warning post 7 is fixed by the poured concrete 6.

[0043] Specifically, groundwater sampling pipes are important monitoring facilities used to collect and analyze groundwater data. Setting up warning posts can effectively alert pedestrians and vehicles to external factors, preventing accidental collisions or damage to the sampling pipes, thereby protecting the safety and integrity of the monitoring facilities.

[0044] Furthermore, the diameter of the water inlet hole 21 is 8mm-10mm.

[0045] Specifically, within this aperture range, large particles such as soil particles and gravel can be effectively blocked from entering the sampling tube, preventing these substances from contaminating the water sample and ensuring its purity and accuracy. Furthermore, an appropriate aperture size ensures that groundwater can smoothly enter the sampling tube, without allowing excessive impurities to enter due to an overly large aperture, or restricting water flow due to an overly small aperture, thus improving sampling efficiency. Moreover, a small aperture reduces the risk of internal blockage in the sampling tube, thereby extending its lifespan and reducing maintenance costs.

[0046] The groundwater monitoring device for red mud dump sites provided in this application has advantages such as precise control of water inflow, prevention of large particles from entering, improved sampling efficiency, adaptability to different aquifer characteristics, reduced maintenance costs, and enhanced reliability of sampling data, by distributing water inlet holes with diameters between 8mm and 10mm on the groundwater sampling pipe.

[0047] Furthermore, the groundwater monitoring device for the red mud dump site provided in this application also includes a control well, which is set up upstream of the red mud dump site, and several monitoring wells are set up downstream of the red mud dump site.

[0048] Specifically, control wells are typically located upstream of the red mud dump, away from potential pollution sources. This allows for monitoring of groundwater quality in areas unaffected by the red mud dump, providing background data for assessing its impact on groundwater. By comparing the water quality data from control and monitoring wells, it is possible to more accurately determine whether the red mud dump has polluted groundwater, and the extent and extent of that pollution.

[0049] Meanwhile, red mud dumps can cause multi-point and multi-faceted pollution of groundwater. By setting up multiple monitoring wells, a wider area can be covered, allowing for more comprehensive monitoring of groundwater quality. This helps identify potential pollution sources and trends, enabling timely countermeasures. Furthermore, multiple monitoring wells provide more water quality data points, increasing the representativeness and reliability of the data. Comprehensive analysis of this data allows for a more accurate assessment of the impact of red mud dumps on groundwater, providing a scientific basis for developing environmental protection and remediation measures. Moreover, pollutants in groundwater can spread in different forms, such as point source pollution and linear pollution. Setting up multiple monitoring wells can accommodate different forms of pollution diffusion, more accurately capturing the propagation paths and impact range of pollutants.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A red mud stockpile groundwater monitoring device, characterised in that, include: Monitoring well body; The monitoring well body includes: a monitoring well (1) and a groundwater sampling pipe (2); The monitoring well (1) has a hollow ring structure; the groundwater sampling pipe (2) is vertically installed in the hollow part of the monitoring well (1), and several water inlet holes (21) are distributed on the lower part of the pipe wall of the groundwater sampling pipe (2); several sensors for monitoring groundwater quality are installed inside the groundwater sampling pipe (2); A filter layer is filled between the outer wall of the groundwater sampling pipe (2) and the inner wall of the monitoring well (1).

2. The red mud storage area groundwater monitoring apparatus according to claim 1, characterised in that, The sensors include: pH sensor, conductivity sensor, turbidity sensor, dissolved oxygen sensor, heavy metal sensor, and fluoride sensor.

3. The bauxite residue storage area groundwater monitoring apparatus defined in claim 1, characterised in that, The filter layer comprises, from bottom to top, the following layers: a first quartz sand layer (3), a second quartz sand layer (4), and a clay layer (5); The particle diameter of the first quartz sand layer (3) is larger than that of the second quartz sand layer (4), and the particle diameter of the second quartz sand layer (4) is larger than that of the clay layer (5). The first quartz sand layer (3) is distributed in the area where the several water inlets (21) are located.

4. The bauxite residue storage area groundwater monitoring apparatus defined in claim 1, characterised in that, A sleeve (8) is fitted at the upper opening of the groundwater sampling pipe (2). The bottom of the sleeve (8) is fixed by the poured concrete (6), and its top opening is higher than the opening of the groundwater sampling pipe (2). A cover plate (9) is provided at the upper opening of the sleeve (8). The cover plate (9) and the sleeve (8) are movably connected by a hinge (10). On the opposite side of the hinge (10), a latch (11) is provided for fixing the cover plate (9) and the sleeve (8).

5. The bauxite residue storage area groundwater monitoring apparatus defined in claim 4, characterised in that, The plurality of water inlets (21) are distributed in a quincunx pattern at the lower part of the groundwater sampling pipe (2).

6. The bauxite residue storage area groundwater monitoring apparatus defined in claim 4, characterised in that, The outer wall of the groundwater sampling pipe (2), in the area where the water inlet holes (21) are distributed, is wrapped with non-woven fabric.

7. The bauxite residue storage area groundwater monitoring apparatus defined in claim 4, characterised in that, A warning post (7) is fixed around the sleeve (8), and the bottom of the warning post (7) is fixed by the poured concrete (6).

8. The bauxite residue storage area groundwater monitoring apparatus defined in claim 2, characterised in that, The diameter of the water inlet hole (21) is 8mm-10mm.

9. The red mud storage area groundwater monitoring apparatus according to any one of claims 1 to 8, characterised in that, It also includes a control well, which is located upstream of the red mud dump, and several monitoring wells are located downstream of the red mud dump.

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