CN210595310U - Contain non-aqueous phase liquid pollution groundwater normal position and take out processing system - Google Patents
Contain non-aqueous phase liquid pollution groundwater normal position and take out processing system Download PDFInfo
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- CN210595310U CN210595310U CN201921182175.3U CN201921182175U CN210595310U CN 210595310 U CN210595310 U CN 210595310U CN 201921182175 U CN201921182175 U CN 201921182175U CN 210595310 U CN210595310 U CN 210595310U
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Abstract
The utility model belongs to the technical field of polluted groundwater environment remediation, in particular to a groundwater in-situ pumping treatment system containing non-aqueous phase liquid pollution, which is characterized in that a groundwater pumping well is arranged according to the stratum conditions of a polluted area, the groundwater pumping well comprises a groundwater area and a non-aqueous phase liquid area, and the non-aqueous phase liquid of the groundwater pumping well is pumped to a sewage treatment device; the sewage treatment equipment separates the non-aqueous phase liquid to form qualified underground water; and injecting qualified underground water into an underground water area of the underground water pumping well. And underground water is injected into the other depth position of the extraction well while non-aqueous phase liquid is extracted, so that the condition that the underground water level is changed too much is avoided. The pumping efficiency of the non-aqueous phase liquid is improved, the condition that the non-aqueous phase liquid is attached to the soil cannot occur due to the fact that the underground water level cannot fluctuate greatly, the non-aqueous phase liquid can be pumped effectively in a short construction period, and the repairing efficiency and the repairing effect are greatly improved.
Description
Technical Field
The utility model belongs to the technical field of pollute groundwater environment restoration, concretely relates to contain non-aqueous phase liquid pollution groundwater normal position processing system of taking out.
Background
Underground water is a precious fresh water resource for human beings, but with the continuous development of the social industrialization process, the problems of waste water discharge, industrial waste residues, agricultural irrigation, landfill site leakage, damage of transport pipelines and storage tanks of petrochemical raw materials and the like cause serious underground water pollution, so that the problem of water resource shortage which is originally short is more serious, and serious threats and challenges are formed for the living health, food safety, drinking water safety, regional ecological environment, sustainable development of economy and society and even social stability of people, and underground water restoration becomes an environmental problem which is currently concerned by the public and the society.
The conventional groundwater remediation method comprises an ex-situ extraction remediation method and an in-situ remediation method, wherein the in-situ remediation method has the defects that the remediation period is long, the remediation effect on low-permeability sites is poor, the injected remediation agent secondary product generates new environmental problems on groundwater and the like, and the remediation method is gradually replaced by the extraction remediation method at present. The traditional pumping repair method is to build a pumping well in a polluted area, pump out polluted underground water and then treat the polluted underground water by sewage treatment equipment to complete repair, however, the repair method has some problems when aiming at the polluted underground water containing non-aqueous phase liquid (NAPL):
firstly, light non-aqueous phase liquid (LNAPL) has the characteristics of small specific gravity and non-miscible solubility in water, and is not easy to be pumped out along with underground water; and when the extraction water level changes, the water is easy to be directly attached to the soil, and the problem of incomplete extraction occurs.
Secondly, traditional pumping system can increase the hydraulic gradient of taking out through addding the injection well and improve the efficiency of taking out to avoid taking out the well and appear the slow condition of return water, however on the place that soil permeability is relatively poor, add the injection well and often can not reach expected effect, take out the well and still can appear the slow condition of return water.
Disclosure of Invention
The utility model aims at overcoming the problem of low pumping efficiency of non-aqueous phase liquid polluted underground water in the prior art.
Therefore, the utility model provides a processing system is taken out to in situ of containing non-aqueous phase liquid pollution groundwater, including sewage treatment device, still include groundwater and take out the well, take out module and injection module out, it includes non-aqueous phase liquid extraction device, takes out the control valve and takes out the water pump to take out the module out, the injection module includes injection control valve, injection pump and groundwater injection device;
the underground water pumping well, the non-aqueous phase liquid pumping device, the pumping control valve, the pumping water pump and the sewage treatment equipment are sequentially connected through pipelines so as to pump non-aqueous phase liquid from the underground water pumping well into the sewage treatment equipment, and the sewage treatment equipment is used for treating and repairing the non-aqueous phase liquid into qualified underground water;
the sewage treatment equipment, the injection water pump, the injection control valve and the underground water injection device are sequentially connected through pipelines so as to inject qualified underground water into the underground water pumping well from the sewage treatment equipment.
Preferably, the non-aqueous phase liquid extraction device comprises a suspension ball for extracting non-aqueous phase liquid, wherein the surface of the suspension ball is provided with water collecting holes, and the draft of the suspension ball is between the non-aqueous phase liquid level and the underground horizontal level.
Preferably, groundwater injection device is including the suspension ball that is used for pouring into qualified water, suspension ball surface is equipped with the water collecting hole, suspension ball draft is located the groundwater zone.
Preferably, flow monitoring meters are arranged on the extraction control valve and the injection control valve.
Preferably, a water quality detector is arranged at the inlet and the outlet of the sewage treatment equipment, and the pumping control valve and the injection control valve are electrically connected with the water quality detector.
Preferably, the groundwater extraction well is a plurality of working wells working in parallel, and an extraction port and a main inlet of each working well are respectively connected with the extraction module and the injection module.
Preferably, the non-aqueous phase liquid comprises light waste diesel.
Preferably, an active medicament is arranged in the sewage treatment equipment, and the active medicament comprises H2O2And ferrous iron.
Preferably, the mass ratio of the medicament to the nonaqueous liquid in the sewage treatment equipment is 1.5%.
The utility model has the advantages that: the utility model provides a processing system takes out in situ of groundwater that contains non-aqueous phase liquid pollution sets up groundwater and takes out the well according to the stratum condition in pollution area, contains groundwater district and non-aqueous phase liquid area in the groundwater takes out the well, takes out the non-aqueous phase liquid of groundwater taking out the well to sewage treatment device; the sewage treatment equipment separates the non-aqueous phase liquid to form qualified underground water; and injecting qualified underground water into an underground water area of the underground water pumping well. The situation that the underground water level changes greatly is avoided by directly and preferentially pumping the non-aqueous phase liquid and simultaneously injecting the underground water into the other depth position of the pumping well. The pumping efficiency of the non-aqueous phase liquid is improved, the condition that the non-aqueous phase liquid is attached to the soil cannot occur due to the fact that the underground water level cannot fluctuate greatly, the non-aqueous phase liquid can be pumped effectively in a short construction period, and the repairing efficiency and the repairing effect are greatly improved.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of the in-situ pumping treatment system for groundwater contaminated by non-aqueous phase liquid.
Description of reference numerals: the device comprises a non-aqueous phase liquid pumping device 1, a groundwater injection device 2, a pumping control valve 3, an injection control valve 4, a pumping water pump 5, an injection water pump 6, a sewage treatment device 7, a water inlet 71 and a water outlet 72.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The embodiment of the utility model provides a contain non-aqueous phase liquid pollution groundwater normal position and take processing system out, including sewage treatment device, still include groundwater and take out the well, take out module and injection module out, it includes non-aqueous phase liquid take out device, takes out the control valve and takes out the water pump to take out the module out, the injection module includes injection control valve, injection pump and groundwater injection device;
the underground water pumping well, the non-aqueous phase liquid pumping device, the pumping control valve, the pumping water pump and the sewage treatment equipment are sequentially connected through pipelines so as to pump non-aqueous phase liquid from the underground water pumping well into the sewage treatment equipment, and the sewage treatment equipment is used for treating and repairing the non-aqueous phase liquid into qualified underground water;
the sewage treatment equipment, the injection water pump, the injection control valve and the underground water injection device are sequentially connected through pipelines so as to inject qualified underground water into the underground water pumping well from the sewage treatment equipment.
Therefore, as shown in fig. 1, a groundwater extraction well 10 is excavated in the groundwater pollution area, the depth and the opening size of the groundwater extraction well 10 are designed according to the comprehensive consideration of the groundwater geological conditions and the groundwater pollution conditions of the polluted site, and then the sizes of the extraction module and the injection module are designed according to the size of a wellhead. Then the non-aqueous phase liquid pumping device 1, the pumping control valve 3, the pumping water pump 5 and the sewage treatment device 7 are sequentially connected by pipelines, the non-aqueous phase liquid pumping device 1 is immersed in a non-aqueous phase layer in the underground water pumping well 10, generally the non-aqueous phase liquid is light waste diesel oil, the oil and the water have obvious boundary lines and different densities, so that the non-aqueous phase liquid pumping device 1 can be just immersed in the non-aqueous phase layer by designing the density and the size of the non-aqueous phase liquid pumping device 1, the pumped non-aqueous phase liquid is ensured not to pump underground purified water, the non-aqueous phase liquid enters from a water inlet at the upper part of the sewage treatment device 7, then the non-aqueous phase liquid is purified and repaired in the sewage treatment device 7, the sewage treatment device 7 is a conventional sewage treatment process, the non-aqueous phase liquid separation device and the sewage treatment device are arranged, the sewage treatment, common processes include flocculation precipitation, advanced oxidation, activated carbon adsorption, and the like. The purified water after the restoration treatment flows out through a water outlet 72 at the bottom of the sewage treatment device 7, the purified water is sequentially connected to the underground water injection device 2 through a water injection pump 6 and an injection control valve 4 pipeline, and the underground water injection device 2 is positioned on an underground water layer. Thus, a circulation is formed, and the non-aqueous phase liquid is pumped out for treatment, and the treated purified water is injected into the groundwater again, so that the total water level of the groundwater pumping well 10 is ensured to be unchanged. Specifically, when the density of the non-aqueous phase liquid is greater than that of water, the non-aqueous phase liquid is located at the bottom of the groundwater extraction well 10, the non-aqueous phase liquid extraction device 1 is placed at the bottom for extraction, and otherwise, the non-aqueous phase liquid is extracted at the upper part.
The pressure and the flow of the pumping water pump 5 and the injection water pump 6 can be selected according to the depth of a pumping well, the groundwater return speed and the like, the pressure design parameter is 0.1-10 MPa, the flow design parameter is 10-1000L/min, and groundwater pumping requirements under different working conditions are met. The overflowing material of the water pump can be cast iron lining polytetrafluoroethylene or 304 stainless steel according to the characteristics of target pollutants.
The utility model discloses it is showing to contain non-aqueous phase liquid pollution groundwater remediation effect, also can be used to the restoration in conventional groundwater pollution place. The utility model discloses simple and easy, easy operation, with strong points, it is suitable for extensively, weak point consuming time, economy is feasible, the restoration in various groundwater pollution type place. The device can adjust parameters according to different stratum conditions and underground water burying conditions in the underground water aquifer, and the pumped underground water is timely restored to reach the standard and then injected into the underground water environment, so that new environmental influence on the restored underground water can be avoided, the development and utilization of the land can be unaffected, the resource utilization of the land is realized, and the device has good environmental protection benefits and social benefits.
Preferably, the non-aqueous phase liquid pumping device comprises a suspension ball for pumping non-aqueous phase liquid, water collecting holes are formed in the surface of the suspension ball, and the draft of the suspension ball is between the non-aqueous phase liquid level and the underground horizontal plane. As shown in fig. 1, the non-aqueous phase liquid pumping device 1 is designed to be in a spherical suspension shape, and the surface of the spherical body is provided with water collecting holes, so that the suspension depth can be adjusted according to the thickness of the non-aqueous phase liquid to be between the non-aqueous phase liquid and the groundwater, and the non-aqueous phase liquid can move up and down along with the groundwater level, thereby ensuring that the pumped main substance is the non-aqueous phase liquid on the surface of the groundwater. The device material can be designed according to the physical and chemical properties of the extracted polluted object, and the optional material is PE material, stainless steel material and other materials. The size and the dimension of the device can be designed according to the size of a monitoring well, the groundwater return speed and the like, and the diameter range is 30mm-500 mm.
According to the preferable scheme, the underground water injection device comprises a suspension round ball used for injecting qualified water, water collecting holes are formed in the surface of the suspension round ball, and the draft of the suspension round ball is located in an underground water area. As shown in fig. 1, the groundwater injection device 2 is designed similarly to the nonaqueous phase liquid extraction device 1, and when extracting heavy nonaqueous phase liquid, the groundwater injection device 2 changes its role from the nonaqueous phase liquid extraction device 1, and the groundwater injection device 2 takes charge of extraction, and the groundwater extraction device 1 takes charge of injection.
Preferably, the pumping control valve and the injection control valve are both provided with flow monitoring meters. Therefore, the pumping control valve 3 is provided with a flow monitoring and control valve, converts flow signals into electronic signals and transmits the electronic signals to the underground water injection pump 6, and controls and adjusts the injection flow of the underground water injection pump 6 in the underground water pumping repair process, so that the underground water pumping flow and the underground water injection flow are kept consistent, and the underground water level cannot fluctuate greatly. The injection control valve 4 is provided with a flow monitoring and control valve, converts a flow signal into an electronic signal and transmits the electronic signal to the groundwater pumping water pump 5, controls and adjusts the pumping flow of the groundwater pumping water pump 5 in the groundwater pumping repair process, enables the groundwater pumping flow to be consistent with the groundwater injection flow, and prevents the groundwater level from generating large fluctuation.
In the preferable scheme, a water quality detector is arranged at the inlet and the outlet of the sewage treatment equipment, and the pumping control valve and the injection control valve are electrically connected with the water quality detector. Therefore, water samples are regularly taken from the water inlet of the sewage treatment equipment at intervals of one week for detection, after the effluent detection meets the repair standard, pumping treatment is stopped, and repair construction is stopped after the groundwater pumping area is qualified.
In a preferred scheme, the underground water pumping well is a plurality of working wells working in parallel, and a pumping outlet and a main inlet of each working well are respectively connected with the pumping module and the injection module. Therefore, a plurality of working wells can share one sewage treatment device 7.
Preferably, the sewage treatment equipment is internally provided with an active medicament and the active medicamentThe sexual agent comprises H2O2And ferrous iron. Therefore, the process flow and the medicament adding parameters of the sewage treatment equipment are designed according to the characteristics and the concentration of the underground water pollutants.
Preferably, the mass ratio of the medicament to the nonaqueous liquid in the sewage treatment equipment is 1.5%. Therefore, the main component of the non-aqueous phase liquid of the pollutants is light waste diesel oil, the sewage treatment equipment is provided with an oil-water separation device, the sewage treatment adopts an advanced oxidation and activated carbon adsorption process, the underground water remediation agent is activated by H2O2 and ferrous iron, and the adding ratio of the agent is 1.5 percent (mass ratio).
The present invention will be further described with reference to the following embodiments:
the diameter of the underground water pumping well is designed to be 100mm according to the stratum conditions of the polluted area, the depth of the pumping well is designed to be 7m, the water level burial depth of the underground water is designed to be 3.5m, and the underground water pumping and injecting device is made of PE materials and is 50mm in diameter. According to the groundwater backwater condition, the pumping and injecting flow rate of single-well groundwater is 10m3/min, the main component of non-aqueous phase liquid of pollutants is light waste diesel oil, the sewage treatment equipment is provided with an oil-water separation device, the sewage treatment adopts an advanced oxidation and activated carbon adsorption process, the groundwater remediation agent is H2O2+ ferrous activation, and the adding ratio of the agent is 1.5% (mass ratio). And 10 extraction wells are designed to simultaneously extract and inject, and the flow rates of the water suction pump and the injection pump are 6m 3/h. After the sewage treatment equipment is installed and debugged, pumping drainage and injection restoration treatment of underground water are started, and the treatment capacity of the sewage station is 6m 3/h. And (3) regularly taking a water sample at the water inlet of the sewage treatment equipment every other week for detection, stopping pumping treatment after the effluent detection meets the repair standard, and stopping repair construction after the underground water pumping area is qualified.
The utility model has the advantages that: the utility model provides a processing system takes out in situ of groundwater that contains non-aqueous phase liquid pollution sets up groundwater and takes out the well according to the stratum condition in pollution area, contains groundwater district and non-aqueous phase liquid area in the groundwater takes out the well, takes out the non-aqueous phase liquid of groundwater taking out the well to sewage treatment device; the sewage treatment equipment separates the non-aqueous phase liquid to form qualified underground water; and injecting qualified underground water into an underground water area of the underground water pumping well. The situation that the underground water level changes greatly is avoided by directly and preferentially pumping the non-aqueous phase liquid and simultaneously injecting the underground water into the other depth position of the pumping well. The pumping efficiency of the non-aqueous phase liquid is improved, the condition that the non-aqueous phase liquid is attached to the soil cannot occur due to the fact that the underground water level cannot fluctuate greatly, the non-aqueous phase liquid can be pumped effectively in a short construction period, and the repairing efficiency and the repairing effect are greatly improved.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.
Claims (9)
1. The utility model provides a contain non-aqueous phase liquid pollution groundwater normal position and take out processing system, includes sewage treatment device, its characterized in that: the underground water pumping device comprises a pumping module and an injection module, wherein the pumping module comprises a non-aqueous phase liquid pumping device, a pumping control valve and a pumping water pump, and the injection module comprises an injection control valve, an injection water pump and an underground water injection device;
the underground water pumping well, the non-aqueous phase liquid pumping device, the pumping control valve, the pumping water pump and the sewage treatment equipment are sequentially connected through pipelines so as to pump non-aqueous phase liquid from the underground water pumping well into the sewage treatment equipment, and the sewage treatment equipment is used for treating and repairing the non-aqueous phase liquid into qualified underground water;
the sewage treatment equipment, the injection water pump, the injection control valve and the underground water injection device are sequentially connected through pipelines so as to inject qualified underground water into the underground water pumping well from the sewage treatment equipment.
2. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 1, characterized in that: the non-aqueous phase liquid pumping device comprises a suspension round ball for pumping non-aqueous phase liquid, water collecting holes are formed in the surface of the suspension round ball, and the draft of the suspension round ball is between the non-aqueous phase liquid plane and the underground horizontal plane.
3. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 1, characterized in that: the underground water injection device comprises a suspension round ball used for injecting qualified water, water collecting holes are formed in the surface of the suspension round ball, and the draft of the suspension round ball is located in an underground water area.
4. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 1, characterized in that: and flow monitoring meters are arranged on the pumping control valve and the injection control valve.
5. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 1, characterized in that: and water quality detectors are arranged at the inlet and the outlet of the sewage treatment equipment, and the pumping control valve and the injection control valve are electrically connected with the water quality detectors.
6. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 1, characterized in that: the underground water pumping well is a plurality of working wells working in parallel, and a pumping outlet and a main inlet of each working well are respectively connected with the pumping module and the injection module.
7. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 1, characterized in that: the non-aqueous phase liquid comprises light waste diesel oil.
8. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 1, characterized in that: an active medicament is arranged in the sewage treatment equipment, and comprises H2O2And ferrous iron.
9. The in-situ extraction treatment system for non-aqueous phase liquid polluted groundwater according to claim 8, characterized in that: the mass ratio of the medicament to the non-aqueous phase liquid in the sewage treatment equipment is 1.5%.
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| CN201921182175.3U CN210595310U (en) | 2019-07-25 | 2019-07-25 | Contain non-aqueous phase liquid pollution groundwater normal position and take out processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255638A (en) * | 2019-07-25 | 2019-09-20 | 中冶南方都市环保工程技术股份有限公司 | A kind of polluted underground water containing nonaqueous phase liquid original position pump-and-treat system system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255638A (en) * | 2019-07-25 | 2019-09-20 | 中冶南方都市环保工程技术股份有限公司 | A kind of polluted underground water containing nonaqueous phase liquid original position pump-and-treat system system and method |
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