CN102923798A - Device and method for repairing underground water ammonia nitrogen pollution in normal position and abnormal position combined mode - Google Patents
Device and method for repairing underground water ammonia nitrogen pollution in normal position and abnormal position combined mode Download PDFInfo
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Abstract
A device for repairing underground water ammonia nitrogen pollution in a normal position and abnormal position combined mode mainly comprises a pumping well and a water injection well, wherein a water suction pump is installed in a well pipe of the pumping well, and a boosting pump is installed in a well pipe of the water injection well; well sieves are installed on the parts of the well pipes of the pumping well and the water injection well under the water level; a water conveying pipeline is connected between the water suction pump and the boosting pump; and the well pipes of the pumping well and the water injection well are respectively installed in respective protecting walls with pores of the pumping well and the water injection well, and filling materials are filled between the well pipes and the protecting walls to form a permeable reaction wall. The invention further discloses a method for repairing underground water ammonia nitrogen pollution by utilizing the device.
Description
Technical field
The invention belongs to underground water recovery technique field, relate to particularly a kind of original position-dystopy and unite the device that annular PRB repairs the underground water ammonia and nitrogen pollution.
The invention still further relates to the method for utilizing said apparatus to repair the underground water ammonia and nitrogen pollution.
Background technology
Underground water is one of global human assurance of depending on for existence.Along with society becomes increasingly prosperous, China worker, agricultural development day by day increase underground water demand.The discharging of ammonia nitrogen is the primary pollution source of ammonia and nitrogen pollution in the underground water in all types of industries waste water, and in addition, the municipal wastewater treatment plant denitrogenation is incomplete, makes the water outlet ammonia nitrogen usually not reach state sewage emission standard.Ammonia-nitrogen content in the surface water such as river, river, lake is higher, and surface water is affecting the concentration of ammonia nitrogen in the underground water in the process of groundwater recharge.Ammonia nitrogen in the water can be converted to nitrite under a stable condition, if long-term drinking, the nitrite in the water will form inferior ammonium nitrate with protein bound, and this is a kind of strong carcinogen, and is totally unfavorable to HUMAN HEALTH.Therefore, for human security existence, repair ammonia and nitrogen pollution underground water imperative.
What at present, domestic and international underground water recovery technique was the most common mainly contains following three kinds:
1) extracts processing recovery technique (P﹠amp out; T), this technology is the Remedy Technology of Contaminated Groundwater that occurs the earliest, also is the representative art of underground water showering.Carry out the groundwater pollution reparation so far from the eighties in 20th century, groundwater pollution is administered still with P﹠amp; The T technology is main.Traditional P﹠amp; The T technology is that the underground water that pollutes is released, and then processes on the ground.In recent years, along with deepening continuously of Pollution abatement research, this technology has had widely implication, as long as in the groundwater pollution governance process underground water implemented to extract or inject, all classifies as P﹠amp; The T technology.
2) in evening time of occurring of monitoring natural attenuation recovery technique MNA technology, just begin formally to be used for groundwater pollution the nineties in 20th century and administer.This technology is polluted reparation based on contaminated site self physico chemical factor and pollutent Natural Attenuation ability, thereby reaches purposes such as reducing Pollutant levels, toxicity and transport property.In addition, the MNA technology also must adopt corresponding Monitoring and Controlling technology according to the management goal of Polluted area, and the natural repair process of underground water is carried out monitoring and evaluation.
3) original position PRB recovery technique.The PRB recovery technique is the abbreviation of permeable reaction wall (PermeableReactive Barrier) recovery technique, refer to underground installation active material body of wall so that interception pollutent pinnule, make and pollute pinnule by behind the reaction medium, physics through a system, chemistry, adsorption, thus the experimental pollution substrate concentration reaches the purpose of environmental standard.
Every kind of method has its limitation and regionality.As:
(1) in extracting treatment technology out, for soft clay area, AQUIFER HYDRAULIC is very little, and current are slow, and drawing water for a long time not only wastes time and energy but also can cause land subsidence.
(2) conventional P RB technology is a kind of passive based technique for in-situ remediation, repairs after utilizing under the natural condition of groundwater flow contaminated underground water by PRB.PRB mainly is comprised of the higher reaction medium of permeability coefficient, and it is perpendicular to the groundwater flow direction.If in the situation that the little groundwater velocity of this Polluted area soil layer permeability coefficient is very little, traditional PRB is to the obvious repairing effect of its nothing; When large area region underground water was repaired, traditional PRB recovery technique needed dig on a wide area, takies big area soil and havoc hydrogeological conditions, and needed very large economy spending.Therefore, for developing country, must consider that the rational PRB of economical and effective repairs the polluted underground water technology.
Summary of the invention
The object of the present invention is to provide a kind of original position-dystopy to unite the device of repairing the underground water ammonia and nitrogen pollution.
Another purpose of the present invention is to provide a kind of method of utilizing said apparatus to repair the underground water ammonia and nitrogen pollution.
For achieving the above object, original position-dystopy provided by the invention is united the device of repairing the underground water ammonia and nitrogen pollution, mainly comprises:
One pumped well is equipped with lift pump in the well casing of this pumped well;
One water injection well is equipped with topping-up pump in the well casing of this water injection well;
The well casing of pumped well and water injection well is positioned at the following part of water level face and is provided with the well sieve;
Be connected with water pipe between lift pump and the topping-up pump;
The well casing of pumped well and water injection well is placed in respectively in separately the retaining wall with holes, is filled with repair materials and forms permeable reaction wall in the middle of well casing and the retaining wall.
Described device, wherein, retaining wall with holes is perforated plastic (ABS plastic) drain board of annular.
Described device, wherein, repair materials is that (particle diameter is 1～2mm) to natural zeolite.
Described device wherein, is provided with and the monitor well of pumped well with even depth near pumped well is horizontal, with monitoring water level and water quality.
Described device, wherein, monitor well is 1-5m apart from pumped well.
Described device, wherein, pumped well top, water injection well top and water pipe all are embedded in below the 0.5m of ground, prevent land operations to the destruction of this prosthetic device, reduce the impact on land operations simultaneously in repair process.
Described device, wherein, water pipe is metallic hose.
Described device, wherein, pumped well and water injection well are along water (flow) direction or the setting of Pollution Plume radiation direction, and pumped well is arranged on the downstream of current, and water injection well is arranged on the upstream of current.
The method of utilizing said apparatus to repair the underground water ammonia and nitrogen pollution provided by the invention, pumped well is by in the underground water suction pumped well of permeable reaction wall with pollution, make the underground water of pollution carry out the reparation first time through permeable reaction wall, be injected in the water injection well by water pipe again and carry out infiltrating in the waterbearing stratum after secondary is repaired through permeable reaction wall.
Described method, wherein, with in the underground water suction pumped well, water injection well injects water in the waterbearing stratum by water injection well by topping-up pump pumped well by lift pump.
Beneficial effect of the present invention:
1) certain thickness ring-type PRB and passive retaining wall perviousness are strong, possesses stronger water storage function, and adopt mode by turns to move in the repair process, the energy has been saved in waterbearing stratum for the relatively poor soft clay area poor permeability of perviousness on the one hand, can make on the other hand underground water and the PRB medium sufficient reacting of pollution, strengthened and drawn water and rate of water injection, increased remediation efficiency.
2) not affected by waterpower, little to hydrogeological conditions destructiveness in the Polluted area.Because in the very slow situation of soft soil area groundwater flow, traditional PRB can't finish repairing effect by natural flows power, not affected by underground hydraulic gradient so give additionaling power with pump.The water that utilizes topping-up pump that pumped well is extracted out when drawing water injects the waterbearing stratum by water injection well, has prevented from causing land subsidence because drawing water for a long time.
3) compare conventional P RB technology, plant area area of the present invention reduces much and fully in underground operation, and is very little to the ground Activity Effects.Be easy to construction and installation, cut down expenses.The installation of pump and underground pipeline is simple, and comparing in the conventional P RB technology over the ground, the excavation of surface large area and the big scale degree of depth has reduced very large spending.After device uses inefficacy, needn't stop gear, can fill new reaction medium with another new well and form new PRB system.
Description of drawings
Fig. 1 is the device schematic diagram of associating original position of the present invention-showering underground water ammonia and nitrogen pollution.
Fig. 2 is the sectional schematic diagram of pumped well among Fig. 1 (water injection well) well sieve section.
Fig. 3 is PRB unit layout figure among the embodiment 1.
Fig. 4 is PRB device side cut-away view among the embodiment 1.
Embodiment
Be applied to the limitation that special soft soil area underground water ammonia and nitrogen pollution is repaired for overcoming the simple original position of tradition or showering technology, obtain economical and efficient and land operations and hydrogeological conditions are affected very little underground water recovery technique.The invention provides a kind of original position-dystopy and unite annular PRB underground water ammonia and nitrogen pollution prosthetic device.
See also Fig. 1, device of the present invention mainly is comprised of pumped well 1, lift pump 11, water injection well 2, topping-up pump 21, water delivery metallic hose 3.Permeable reaction walls (PRB) of annular in the periphery of pumped well 1 and water injection well 2, concrete formation is to be filled with filler 6 respectively and between the well casing 5 of pumped well and water injection well at passive annular plastics drain board (ABS plastic) 4 with holes, and this filler 6 can adopt the natural zeolite of particle diameter 1～2mm.The water-permeable of retaining wall is strong, and permeability coefficient is 10
-3～10
-2Cm/s.The well casing 5 of pumped well and water injection well is positioned at the following part of water level face and is provided with well sieve 7.Please join in conjunction with shown in Figure 2, show the sectional schematic diagram of pumped well (water injection well) well sieve section.
The well casing inner diameter d of pumped well and water injection well is 5～15cm, the peripheral ring-type PRB thickness h of well sieve is 15～20cm, the passive annular plastics of outermost (ABS plastic) drain board 4 thickness 2～4cm, pumped well and water injection well shaft bottom buried depth are (d+2h) 3-5 times apart from water-resisting layer, and water delivery metallic hose internal diameter is 5～15cm.Pumped well and water injection well level interval are (d+2h) 6～10 times.Be the monitor well 8 that arranges in 1～5m with even depth in distance pumped well well head transverse distance, the well casing of monitor well 8 is positioned at the following part of water level face and is provided with the well sieve, with monitoring water level and water quality.The top of pumped well, water injection well and water delivery metallic hose all are embedded in below the ground elevation 0.5m.Pumped well and water injection well are along water (flow) direction or the setting of Pollution Plume radiation direction, and wherein pumped well is arranged on the downstream of current, and water injection well is arranged on the upstream of current.The magnitude setting of concrete pumped well and water injection well is decided according to contaminated area.
Because polluted underground water contacts with reaction medium for a long time and reacts, the peripheral PRB material failure of pumped well well sieve can occur or obstructing problem occurs, at this moment can be in other positions that reserve repair the situation associating original position that the new pumped well of construction and installation is new with existing water injection well composition again-dystopy ring-shaped P RB device according to polluted underground water.After original device is discarded the mode of available curtain grouting with its processing in order to avoid cause secondary pollution.Can build new well closing on this Jing Chu if after some wells lost efficacy, continue reparation, and with the curtain grouting method well be sealed.
Device of the present invention is in operational process, and the circulation of pumped well and water injection well is taken out water injection manifold and will be adsorbed on soil surface ammonia nitrogen solution to soil cycling elution interaction energy and be drawn onto in the soil water solution, and then can reach the effect that contaminated soil is repaired.
The present invention mainly for the shallow flow velocity of bury of groundwater very little soft soil area in repaired by ammonia and nitrogen pollution underground water.Its removal to single in homogeneous and the heterogeneous body waterbearing stratum or combined pollutant is all applicable.
The diversity of application of installation of the present invention be embodied in this device in the laying of Polluted area, fill the aspects such as reaction medium characteristic, proportioning.And can monitor at any time this zone any position ground water table and groundwater quality and repair situation.
The method of original position of the present invention-dystopy annular repair ammonia and nitrogen pollution underground water is:
To again infiltrate in the waterbearing stratum after the reparation through being injected into again in the water injection well after once repairing in the underground water suction well that pollute around the pumped well with the pump mode of taking out.The underground water that pollutes fully contacts with reaction medium, by chemical reaction/physical adsorption/effects such as biological degradation.Pump speed is observed the Decline or rise of groundwater level situation according to monitor well and is determined, ground water table is being fluctuateed in the scope by a small margin.
Embodiment 1
This area condition: groundwater level depth 3m, aeration zone and waterbearing stratum are mainly weak soil, median size＜0.1mm; The soil layer permeability coefficient is 8 * 10
-7Cm/s.This Polluted area quality of groundwater: pH is 8.2; ORP is 128mV; The ammonia nitrogen mean concns is 21mg/L in the underground water.Associating repair system: water injection well, pumped well well casing internal diameter 10cm; Ring-shaped P RB thickness 20cm; Plastic draining thickness of slab 2cm; Lift pump pump speed 400ml/min.
Stable rear 75 days, to water quality monitoring (WQM), the result showed, ground is without obvious depression, and is good to the ammonia nitrogen treatment effect, serious stopping state do not occur, and concentration is that 0.2～0.25mg/L clearance on average reaches more than 98% after processing.
Claims (9)
1. an original position-dystopy is united the device of repairing the underground water ammonia and nitrogen pollution, mainly comprises:
One pumped well is equipped with lift pump in the well casing of this pumped well;
One water injection well is equipped with topping-up pump in the well casing of this water injection well;
The well casing of pumped well and water injection well is positioned at the following part of water level face and is provided with the well sieve;
Be connected with water pipe between lift pump and the topping-up pump;
The well casing of pumped well and water injection well is placed in respectively in separately the retaining wall with holes, is filled with repair materials and forms permeable reaction wall in the middle of well casing and the retaining wall.
2. device according to claim 1, wherein, retaining wall with holes is the perforated plastic drain board of annular.
3. device according to claim 1 wherein, is provided with and the monitor well of pumped well with even depth near pumped well is horizontal, with monitoring water level and water quality.
4. device according to claim 3, wherein, monitor well is 1-5m apart from pumped well.
5. device according to claim 1, wherein, pumped well top, water injection well top and water pipe all are embedded in below the 0.5m of ground, prevent land operations to the destruction of this prosthetic device, reduce the impact on land operations simultaneously in repair process.
6. install according to claim 1 or 5, wherein, water pipe is metallic hose.
7. device according to claim 1, wherein, pumped well and water injection well are along water (flow) direction or the setting of Pollution Plume radiation direction, and pumped well is arranged on the downstream of current, and water injection well is arranged on the upstream of current.
8. method of utilizing the described device of claim 1 to repair the underground water ammonia and nitrogen pollution, pumped well is by in the underground water suction pumped well of permeable reaction wall with pollution, make the underground water of pollution carry out the reparation first time through permeable reaction wall, be injected in the water injection well by water pipe again and carry out infiltrating in the waterbearing stratum after secondary is repaired through permeable reaction wall.
9. method according to claim 8, wherein, with in the underground water suction pumped well, water injection well injects water in the waterbearing stratum by water injection well by topping-up pump pumped well by lift pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442517.7A CN102923798B (en) | 2012-11-08 | 2012-11-08 | Device and method for repairing underground water ammonia nitrogen pollution in normal position and abnormal position combined mode |
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| CN201210442517.7A CN102923798B (en) | 2012-11-08 | 2012-11-08 | Device and method for repairing underground water ammonia nitrogen pollution in normal position and abnormal position combined mode |
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| CN103480645A (en) * | 2013-09-30 | 2014-01-01 | 苏州绿地土壤修复科技有限公司 | Injection device for in situ chemical soil remediation and distributing system thereof |
| CN103495601A (en) * | 2013-09-30 | 2014-01-08 | 苏州绿地土壤修复科技有限公司 | In-situ chemical remediation method of soil |
| CN104131594A (en) * | 2014-06-11 | 2014-11-05 | 山东省水利科学研究院 | Filling and water-pumping double-well treating method for treating polluted underground water |
| CN104912126A (en) * | 2015-06-02 | 2015-09-16 | 山西省交通科学研究院 | Polluted-soil restoration system applicable to soft-soil foundation and restoration method |
| CN105712412A (en) * | 2014-11-30 | 2016-06-29 | 江苏维尔利环保科技股份有限公司 | In situ perfusion method for remediation of organic contaminated groundwater |
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| CN103480645A (en) * | 2013-09-30 | 2014-01-01 | 苏州绿地土壤修复科技有限公司 | Injection device for in situ chemical soil remediation and distributing system thereof |
| CN103495601A (en) * | 2013-09-30 | 2014-01-08 | 苏州绿地土壤修复科技有限公司 | In-situ chemical remediation method of soil |
| CN103495601B (en) * | 2013-09-30 | 2016-08-17 | 苏州绿地土壤修复科技有限公司 | A kind of method of chemical soil remediation |
| CN104131594A (en) * | 2014-06-11 | 2014-11-05 | 山东省水利科学研究院 | Filling and water-pumping double-well treating method for treating polluted underground water |
| CN104131594B (en) * | 2014-06-11 | 2016-07-13 | 山东省水利科学研究院 | Double well processing method is filled in-drawn water to underground water pollution |
| CN105712412A (en) * | 2014-11-30 | 2016-06-29 | 江苏维尔利环保科技股份有限公司 | In situ perfusion method for remediation of organic contaminated groundwater |
| CN105712412B (en) * | 2014-11-30 | 2019-02-26 | 江苏维尔利环保科技股份有限公司 | The situ perfusion method of renovation of organic pollution underground water |
| CN104912126A (en) * | 2015-06-02 | 2015-09-16 | 山西省交通科学研究院 | Polluted-soil restoration system applicable to soft-soil foundation and restoration method |
| CN109516609A (en) * | 2018-10-29 | 2019-03-26 | 山东省水利科学研究院 | Groundwater azotate tandem extracts coupled processing system and its method of construction out in situ |
| CN109516609B (en) * | 2018-10-29 | 2023-11-24 | 山东省水利科学研究院 | Underground water nitrate serial in-situ extraction coupling treatment system and construction method thereof |
| CN109775862A (en) * | 2019-01-30 | 2019-05-21 | 中国环境科学研究院 | A kind of permeable reaction wall and underground water pollution biology in situ renovation method |
| CN110369481A (en) * | 2019-07-02 | 2019-10-25 | 南华大学上虞高等研究院有限公司 | A kind of reparation of uranium contaminated soil multistage pre-buried packet and its application method |
| CN111484122A (en) * | 2020-04-22 | 2020-08-04 | 长沙工研院环保有限公司 | Underground water remediation system and method |
| CN111439851A (en) * | 2020-05-29 | 2020-07-24 | 江苏华东地质工程有限公司（江苏省有色金属华东地质勘查局八一〇队） | Permeable reaction system and method for treating polluted soil and underground water by using permeable reaction system |
| CN111842445A (en) * | 2020-07-10 | 2020-10-30 | 陕西科技大学 | In-situ extraction and remediation method for heavy metal contaminated soil |
| CN111842445B (en) * | 2020-07-10 | 2022-06-17 | 陕西科技大学 | In-situ extraction and remediation method for heavy metal contaminated soil |
| CN112808757A (en) * | 2020-12-29 | 2021-05-18 | 中科华鲁土壤修复工程有限公司 | Group type extraction and injection integrated repair system for small-area supply-free underground water well |
| CN113461124A (en) * | 2021-06-17 | 2021-10-01 | 岩土科技股份有限公司 | Ectopic treatment method for polluted underground water |
| CN116282675A (en) * | 2023-02-21 | 2023-06-23 | 浙江佳和生态环境科技有限公司 | In-situ treatment method for ammonia nitrogen in underground water |
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