Underground water environment risk management and control device for chemical industry park

Abstract

The utility model discloses a chemical industry park groundwater environment risk management and control device, the chemical industry park groundwater environment risk management and control device comprises groundwater guide and drainage blind ditches, the groundwater guide and drainage blind ditches comprise a first guide and drainage blind ditch and a second guide and drainage blind ditch; the first guide and drainage blind ditch is arranged on the periphery of the chemical industry park, underground water flows downstream and is connected with the clear water collection pool; and the second guide and drainage blind ditch is arranged in the chemical industry park and is connected with the sewage collection pool. The underground water environment risk management and control device for the chemical industry park is reasonable in structure, and polluted underground water is collected based on natural flowing of the underground water; and compared with traditional underground water pumping treatment, the energy consumption is effectively reduced, and the green and low-carbon management and control requirements are met.

Description

Technical Field

[0001] The utility model belongs to the field of groundwater pollution control, and in particular relates to a groundwater environmental risk control device in a chemical park. Background Art

[0002] Due to long-term high-intensity chemical production activities in chemical parks, chemical wastewater may be discharged or leaked without effective treatment, resulting in the accumulation of various toxic and harmful chemicals in the soil and groundwater, such as heavy metals and persistent organic pollutants.

[0003] When the chemical park was being built, considering that the original surface conditions were not conducive to directly supporting chemical facilities or there were foundation stability issues, artificial filling technology was generally used to ensure the flatness of the land and improve the bearing capacity of the foundation. The groundwater level in the artificial fill layer is usually shallow, and there will be a situation where the surface water and groundwater are connected. A large number of chemical pollutants are mainly concentrated in the groundwater of the artificial fill layer, and migrate horizontally and vertically through the groundwater of the artificial fill layer, expanding the scope of pollution. The groundwater of the artificial fill layer is usually treated by suction, such as patent CN114573135A, but rapid drainage of groundwater in the artificial fill layer can easily lead to ground subsidence in the chemical park.

[0004] Therefore, it is urgent to design a groundwater environmental risk control device and method for a chemical park to solve the current technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a groundwater environmental risk control device and method for a chemical park in response to the above-mentioned technical problems. The device and method have a reasonable structure and collect contaminated groundwater based on the natural flow of groundwater. Compared with traditional groundwater extraction and treatment, the device effectively reduces energy consumption and meets the green and low-carbon control requirements.

[0006] In order to solve the above technical problems, the utility model provides a groundwater environmental risk control device and method for a chemical park, including a groundwater drainage blind ditch, the groundwater drainage blind ditch including a first drainage blind ditch and a second drainage blind ditch; the first drainage blind ditch is arranged at the periphery of the chemical park, the groundwater flows downstream, and is connected to a clean water collection tank, for treating uncontaminated groundwater, so as to guide the groundwater to the clean water collection tank and discharge it regularly, thereby reducing the supply of groundwater to the park; the second drainage blind ditch is arranged inside the chemical park, and is connected to a sewage collection tank, for treating contaminated groundwater, so as to guide the groundwater to the sewage collection tank and discharge it regularly to the park sewage treatment plant, thereby inhibiting the spread of contaminated groundwater.

[0007] In some embodiments, the first drainage blind ditch includes a gravel layer with a hard permeable pipe disposed at the bottom; a surface rainwater drainage ditch is disposed on the side of the gravel layer, and the surface rainwater drainage ditch is set on the surface of the chemical park stratum.

[0008] In some embodiments, a composite drainage net is arranged on the side of the gravel layer, which is arranged in the direction of groundwater inflow; the composite drainage net includes a geotextile layer and a high-density polyethylene layer, and the geotextile layer is arranged on both sides of the high-density polyethylene layer.

[0009] In some embodiments, the first drainage blind ditch further includes a concrete layer disposed on top of the gravel layer.

[0010] In some embodiments, the bottom of the surface rainwater drainage ditch is lower than the isowater line, and the hard permeable pipe is arranged below the surface rainwater drainage ditch.

[0011] In some embodiments, the gravel layer is located above the first layer of groundwater relative to the waterproof base plate in the chemical park.

[0012] In some embodiments, the second drainage blind ditch includes a gravel layer with a hard permeable pipe configured at the bottom; the gravel layers are in pair, and a surface rainwater drainage ditch is arranged between adjacent gravel layers, and the surface rainwater drainage ditch is arranged on the surface of the chemical park stratum; the second drainage blind ditch also includes a concrete layer, which is located on the top of the gravel layer.

[0013] In some embodiments, the second drainage blind ditch includes a gravel layer with a hard permeable pipe disposed at the bottom; the gravel layer is a pair, and a surface rainwater drainage ditch is disposed above the gravel layer, and the surface rainwater drainage ditch is disposed on the surface of the chemical park stratum.

[0014] In some embodiments, a composite drainage net is arranged on the side of the gravel layer, and the composite drainage net includes a geotextile layer and a high-density polyethylene layer, and the geotextile layer is arranged on both sides of the high-density polyethylene layer.

[0015] In addition, the utility model also provides a method for controlling the environmental risk of groundwater in a chemical park, which uses the above-mentioned groundwater environmental risk control device for a chemical park, and according to the seasonal or periodic fluctuations of the groundwater level under natural conditions, uses a first drainage blind ditch to divert groundwater to a clean water collection pool and discharge it regularly, thereby reducing the supply of groundwater to the park; uses a second drainage blind ditch to guide groundwater to a sewage collection pool and discharge it regularly to the park sewage treatment plant, thereby inhibiting the spread of contaminated groundwater.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a device and method for controlling the environmental risk of groundwater in a chemical park. By setting a surface rainwater drainage ditch and a first drainage blind ditch downstream of the groundwater outside the chemical park, the groundwater level in the chemical park is controlled and lowered, thereby reducing the time and space for the groundwater to contact with the pollution source, preventing the further spread of pollutants, and greatly reducing the pressure on the collection and disposal of polluted groundwater.

[0018] A second drainage blind ditch is set up in the chemical park to prevent groundwater pollution from spreading, so that groundwater pollution does not go beyond the boundary, the concentration of groundwater pollutants continues to decrease and reaches the relevant use or function standards, and the risk of pollutants spreading to the lower groundwater is reduced;

[0019] Based on the natural flow trend of groundwater, through drainage rather than forced extraction, compared with the large-scale groundwater level drop caused by the suction method, the groundwater level can be lowered relatively smoothly in a larger area, avoiding the risk of uneven ground subsidence caused by local strong pumping; and compared with traditional groundwater extraction treatment, it effectively reduces energy consumption.

[0020] The blind drainage ditch is set near the existing surface rainwater drainage ditch in the chemical park. First of all, the rainwater drainage ditch in the park is generally located in a relatively low-lying area, which is also a groundwater gathering area. Therefore, the groundwater drainage blind ditch is set at this location with the highest drainage capacity. Secondly, the surface rainwater drainage ditch itself is a through drainage channel. Construction near it has little impact on other structures in the park and is convenient for construction. Thirdly, the bottom of the surface rainwater drainage ditch is lower than the isowater level, and its side wall or bottom effectively reinforces the blind drainage ditch near it. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only schematic and do not limit the present invention, wherein:

[0022] Figure 1 This is a schematic diagram of groundwater environmental risk control measures in a chemical park;

[0023] Figure 2 It is a cross-sectional view of a first guide blind ditch provided by an embodiment of the utility model;

[0024] Figure 3 It is a cross-sectional view of a second blind drain groove provided by an embodiment of the utility model;

[0025] Figure 4 It is a cross-sectional view of a second guide blind ditch provided in another embodiment of the utility model. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0027] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0028] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the utility model and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structure of various components of the embodiments of the utility model, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0029] A groundwater environmental risk control device for a chemical park provided in the present application includes a groundwater drainage blind ditch, and the groundwater drainage blind ditch includes a first drainage blind ditch and a second drainage blind ditch; the first drainage blind ditch is arranged at the periphery of the chemical park, and the groundwater flows downstream and is connected to a clean water collection tank, and is used to treat uncontaminated groundwater, so as to divert the groundwater to the clean water collection tank and discharge it regularly, thereby reducing the supply of groundwater to the park; the second drainage blind ditch is arranged inside the chemical park, and is connected to a sewage collection tank, and is used to treat contaminated groundwater, so as to guide the groundwater to the sewage collection tank and discharge it regularly to the park sewage treatment plant, thereby inhibiting the spread of contaminated groundwater.

[0030] In the present invention, the first drainage blind ditch comprises a gravel layer 7, and a hard permeable pipe 8 is arranged at the bottom of the gravel layer 7. Figure 2 As shown, a surface rainwater drainage ditch 4 is arranged on the side of the gravel layer 7, which is arranged on the surface of the chemical park stratum 1; wherein the gravel layer 7 plays a role in collecting groundwater.

[0031] Furthermore, a composite drainage net 5 is arranged on the side of the gravel layer 7, which is arranged in the direction of groundwater flow; the composite drainage net 5 includes a geotextile layer and a high-density polyethylene layer, and the geotextile layer is arranged on both sides of the high-density polyethylene layer. The composite drainage net 5 is arranged in the direction of groundwater flow of the drainage blind ditch to prevent soil and other impurities from entering the gravel layer 7, and plays a role in isolating and reinforcing the drainage blind ditch.

[0032] The first drainage blind ditch further comprises a concrete layer 6 which is arranged on top of the gravel layer 7. The concrete layer 6 serves to isolate the drainage blind ditch to prevent surface water from entering the blind ditch.

[0033] The bottom of the surface rainwater drainage ditch 4 is lower than the isowater line 2, and the hard permeable pipe 8 is arranged below the surface rainwater drainage ditch 4. The hard permeable pipe 8 can collect and drain groundwater.

[0034] The gravel layer 7 is located above the first layer of groundwater in the chemical park relative to the waterproof bottom plate 3, wherein the first layer of groundwater in the chemical park is a water-impermeable stratum relative to the waterproof bottom plate 3, that is, a waterproof layer.

[0035] Figure 3 It is a cross-sectional view of a second drainage blind ditch provided by an embodiment of the utility model, wherein the second drainage blind ditch comprises a gravel layer 7, and a hard permeable pipe 8 is arranged at the bottom of the gravel layer 7. The number of gravel layers 7 is a pair, and a surface rainwater drainage ditch 4 is arranged between adjacent gravel layers 7, and the surface rainwater drainage ditch 4 is arranged on the surface of the chemical park stratum 1; a concrete layer 6 is arranged on the top of the gravel layer 7. The components in the second drainage blind ditch are the same as those in the first drainage blind ditch, and the functions of the corresponding components are also the same, which will not be repeated here.

[0036] Figure 4 It is a cross-sectional view of a second drainage blind ditch provided by another embodiment of the utility model, wherein the second drainage blind ditch comprises a gravel layer 7, and a hard permeable pipe 8 is arranged at the bottom of the gravel layer 7; the number of the gravel layers 7 is a pair, and a surface rainwater drainage ditch 4 is arranged above the gravel layer 7, and the surface rainwater drainage ditch 4 is arranged on the surface of the chemical park stratum 1.

[0037] A composite drainage net 5 is arranged on the side of the gravel layer 7. The composite drainage net 5 includes a geotextile layer and a high-density polyethylene layer. The geotextile layer is arranged on both sides of the high-density polyethylene layer to prevent soil and other impurities from entering the gravel layer 7, thereby isolating and reinforcing the drainage blind ditch.

[0038] In addition, the utility model also provides a method for controlling the environmental risk of groundwater in a chemical park, which uses the above-mentioned groundwater environmental risk control device for a chemical park, and according to the seasonal or periodic fluctuations of the groundwater level under natural conditions, uses a first drainage blind ditch to divert the groundwater to a clean water collection pool and discharge it regularly, thereby reducing the supply of groundwater to the park; uses a second drainage blind ditch to guide the groundwater to a sewage collection pool and discharge it regularly to the park sewage treatment plant, thereby inhibiting the spread of contaminated groundwater.

[0039] In the utility model, there are two structures of the contaminated groundwater drainage blind ditch inside the chemical park. According to the working space restriction on both sides of the surface rainwater drainage ditch inside the chemical park, a suitable structure can be selected.

[0040] If the space on both sides of the surface rainwater drainage ditch inside the chemical park can meet the construction requirements, it is recommended to use Figure 3The second drainage blind ditch structure shown is similar to the drainage blind ditch for uncontaminated groundwater upstream of the chemical park, except that the drainage blind ditch is distributed on both sides of the surface rainwater drainage ditch;

[0041] If the space on both sides of the surface rainwater drainage ditch inside the chemical park cannot meet the construction requirements, it is recommended to use Figure 4 The second drainage blind ditch structure is shown. The groundwater drainage blind ditch is located at the lower part of the surface rainwater drainage ditch. On the basis of ensuring the stability of the rainwater drainage ditch, two blind ditches are constructed to drain the polluted groundwater.

[0042] Compared with the shortcomings and deficiencies of the prior art, the utility model provides a groundwater environmental risk control device and method for a chemical park, which has a reasonable structure and collects contaminated groundwater based on the natural flow of groundwater. Compared with traditional groundwater extraction and treatment, it effectively reduces energy consumption and meets the green and low-carbon control requirements.

[0043] The present utility model is not limited to the above-mentioned implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the protection scope of the present utility model.

Claims

1. A groundwater environmental risk control device for a chemical park, characterized in that: It includes a groundwater drainage blind ditch, which includes a first drainage blind ditch and a second drainage blind ditch; the first drainage blind ditch is arranged outside the chemical park, the groundwater flows downstream and is connected to the clean water collection tank; the second drainage blind ditch is arranged inside the chemical park and is connected to the sewage collection tank.

2. The groundwater environmental risk control device in a chemical park according to claim 1, characterized in that: The first drainage blind ditch comprises a gravel layer (7), the bottom of which is provided with a hard permeable pipe (8); a surface rainwater drainage ditch (4) is provided on the side of the gravel layer (7), and the surface rainwater drainage ditch (4) is arranged on the surface of the chemical park stratum (1).

3. The groundwater environmental risk control device of a chemical park according to claim 2, characterized in that: A composite drainage net (5) is arranged on the side of the gravel layer (7), and is arranged in the direction of groundwater flow; the composite drainage net (5) comprises a geotextile layer and a high-density polyethylene layer, and the geotextile layer is arranged on both sides of the high-density polyethylene layer.

4. The chemical park groundwater environmental risk control device according to claim 2, characterized in that: The first drainage blind ditch further comprises a concrete layer (6) which is arranged on top of the gravel layer (7).

5. The chemical park groundwater environmental risk control device according to claim 2, characterized in that: The bottom of the surface rainwater drainage ditch (4) is lower than the isowater line (2), and the hard permeable pipe (8) is arranged below the surface rainwater drainage ditch (4).

6. The chemical park groundwater environmental risk control device according to claim 2, characterized in that: The gravel layer (7) is located above the first layer of groundwater in the chemical park relative to the waterproof bottom plate (3).

7. The chemical park groundwater environmental risk control device according to claim 1, characterized in that: The second drainage blind ditch comprises a gravel layer (7), the bottom of which is provided with a hard permeable pipe (8); the gravel layers (7) are provided in a pair, a surface rainwater drainage ditch (4) is provided between adjacent gravel layers (7), and the surface rainwater drainage ditch (4) is provided on the surface of the chemical park stratum (1); the second drainage blind ditch also comprises a concrete layer (6), which is located on the top of the gravel layer (7).

8. The chemical park groundwater environmental risk control device according to claim 1, characterized in that: The second drainage blind ditch comprises a gravel layer (7), the bottom of which is provided with a hard permeable pipe (8); the number of the gravel layers (7) is a pair, a surface rainwater drainage ditch (4) is provided above the gravel layer (7), and the surface rainwater drainage ditch (4) is provided on the surface of the chemical park stratum (1).

9. The chemical park groundwater environmental risk control device according to claim 8, characterized in that: A composite drainage net (5) is arranged on the side of the gravel layer (7), and the composite drainage net (5) comprises a geotextile layer and a high-density polyethylene layer, wherein the geotextile layer is arranged on both sides of the high-density polyethylene layer.

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