CN203461867U - Experimental column device capable of simulating permeable reactive wall - Google Patents
Experimental column device capable of simulating permeable reactive wall Download PDFInfo
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- CN203461867U CN203461867U CN201320578752.7U CN201320578752U CN203461867U CN 203461867 U CN203461867 U CN 203461867U CN 201320578752 U CN201320578752 U CN 201320578752U CN 203461867 U CN203461867 U CN 203461867U
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Abstract
The utility model relates to an experimental column device capable of simulating a permeable reactive wall to remove polluting solutes in underground water. The device comprises a permeable reactive column for removing polluting solutes in underground water, a sand gravel cushion layer for improving the flow state, a sand gravel protective layer for preventing current scour, and a columnar shell, wherein the sand gravel cushion layer, the permeable reactive column and the sand gravel protective layer are arranged in the columnar shell from bottom to top, a water inlet is formed in the bottom of the columnar shell, a water outlet is formed in the top of the columnar shell, a sampling port is formed in the side wall of the columnar shell, and is connected with a sampling plug. The experimental device aims to measure the removal effect of the permeable reactive wall on chlorobenzene compounds by a sampling method, and meanwhile detect the penetration time of the permeable reactive wall. The experimental column device provided by the utility model is novel in structure, simple to operate and convenient to use, provides a good means for researching the technology of repairing underground water by the permeable reactive wall, and is estimated to be commonly welcomed in the industry after being popularized.
Description
Technical field
The utility model relates to a kind of permeable reaction wall of simulating and removes the experiment column device that pollutes solute in underground water, belongs to polluted underground water recovery technique field.
Background technology
Underground water is the important component part of water resources, significant to socio-economic development.China is the very short country of water resources, and water resources ownership per capita is 1/4 of world average level, and there is nearly 70% population Drinking Water in the whole nation.The expert of China Geological Survey Bureau mentions in the speech of international underground water forum, and the whole nation has 90% underground water all to suffer pollution in various degree, and wherein 60% is seriously polluted.Groundwater pollution mainly refers to that mankind's activity causes that chemical composition of groundwater, physical properties and biological characteristics change and make the phenomenon of Quality Down.At present, the regional underground water Organic pollutants that have have surpassed heavy metal contamination and radiocontamination.Especially in Yangtze River Delta Area, along with the adjustment of city planning and the industrial structure, numerous chemical enterprises start to move successively, and leaving over chemical industry place soil and groundwater pollution has become the major issue that affects periphery population health and land development recycling.
Underground water recovery technique is focus and the advanced problems of current environmental science research.Based technique for in-situ remediation not only can be cost-saving, and can under the prerequisite of soil not being carried out disturbance, remove the pollutent in soil and groundwater, improves governance efficiency.At present, groundwater pollution based technique for in-situ remediation mainly comprises: Natural Attenuation method, the facture of drawing water, irrigation, permeable reactive barrier method, soil vapor extraction method and underground water aeration method.The facture of drawing water is traditional underground water recovery technique, has been applied to recovery and the improvement of solubility pollutent in underground environment.The method extracts the underground water having polluted, and then on earth's surface, utilizes physico-chemical process or microbial degradation method etc. to process, and purifies waste water the most at last and enters surface water body, reuse or recharge recharge groundwater.The facture of drawing water repairing effect is reliable, but working cost is high, and repairing efficiency is long.Permeable reactive barrier method (PRB) is a kind of biological or chemical reaction technology, and body of wall is generally arranged in underground reservoir, perpendicular to groundwater flow direction.When groundwater flow under hydraulic gradient effect by reaction during wall, through microbiological deterioration or pollutent and materials for wall generation chemical reaction, be removed, thereby reach the object of environment remediation.The method principle is simple, easy construction, and working cost is cheap.Metallic iron to the degradation principles of halogenated organic matters at the initial stage in the 1990's the permeable reaction wall materials for wall for the treatment of underground water, and obtained immense success.The research of Environmental Protection Agency shows, the activity of metallic iron can keep more than 5 years.With respect to traditional Groundwater Treatment Methods, extract facture (Pump and Treat) out, PRB technology has can continue in-situ treatment pollutent (5～10 years), process multiple pollutant (as heavy metal, organism etc.), treatment effect is good, installation is convenient, cost performance advantages of higher relatively.
Utility model content
The technical problems to be solved in the utility model is to propose a kind of experiment column device of simulating permeable reaction wall, for removing underground water, pollutes solute.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of experiment column device of simulating permeable reaction wall, it is characterized in that comprising: the permeable reaction post that pollutes solute for removing underground water, for improving the sand-gravel cushion of fluidised form, for preventing the sandy gravel protective layer of current scour, and cylindrical shell, described sand-gravel cushion, permeable reaction post, sandy gravel protective layer being arranged in cylindrical shell from bottom to top, the bottom of described cylindrical shell offers water inlet, top offers water outlet, sidewall offers thief hole, on described thief hole, be connected to sampling plug.
The utility model further improves and is:
1, described permeable reaction post is reduction swage reaction column.Specifically by Fe/Ni bimetallic material (reductibility iron powder mixing trace metal Ni, Ni is as catalyzer, Ni content is 2%-5%), quartz sand particle, mix and form.Permeable reaction post is mainly used in removing the pollutent solute in underground water, and the quartz sand particle being mixed into can increase Fe/Ni bimetal cylinder perviousness.
2, described sand-gravel cushion has three-decker, and bottom is thick bed course, and particle size range is 2.0-3.0cm; Middle layer is transition layer, and particle size range is 0.5-1.0cm; Top layer is thin bed course, and particle size range is 0.05-0.1cm.Wherein, the Main Function of thick bed course is that the water column that becomes a mandarin is tentatively discrete; The Main Function of transition layer is further discrete current, makes fluidised form trend evenly; The Main Function of thin bed course is balanced current and impurity screening.
3, described sandy gravel protective layer has double-layer structure, and lower floor is transition layer, and particle size range is 0.5-1.0cm; Upper strata is ballast layer, and particle size range is 0.05-0.1cm.The Main Function of sandy gravel protective layer is to improve flow condition and prevent from testing reaction material in cylinder to run off.
4, described cylindrical shell is connected to form by upper, middle and lower segment plexi-glass tubular; the in-built grittiness stone of epimere plexi-glass tubular protective layer; permeable reaction post is housed in the plexi-glass tubular of stage casing; the in-built grittiness stone of hypomere plexi-glass tubular bed course; between connected plexi-glass tubular, by flange, be fixedly connected with bolt, flange connections is provided with silicagel pad for waterproof.
5, the sidewall of epimere plexi-glass tubular offers a thief hole, and the sidewall of stage casing plexi-glass tubular offers 3 thief holes of axial distribution, and the sidewall of hypomere plexi-glass tubular offers a thief hole.Visible, 3 thief holes are evenly arranged in permeable reaction shell of column, and all the other 2 thief holes lay respectively at sand-gravel cushion and sandy gravel protective layer position.
6, described sampling plug is comprised of chimney filter, sampling syringe needle and trip switch, and wherein chimney filter is threaded with thief hole.
The object of this experimental installation is to measure the removal effect of permeable reactive barrier to chlorobenzene compound by sample mode, checks the time of break-through of permeable reactive barrier simultaneously.
In experimentation, the underground water of pollution flows into from the bottom water inlet of cylindrical shell, and after sand-gravel cushion, underground water evenly infiltrates permeable reaction post; Chlorobenzene compound generation redox reaction in chemical material in permeable reaction post (reductibility iron powder) and underground water, final chlorobenzene compound dechlorination, concentration reduces, the Fe (OH) that simultaneous reactions generates
3adsorbable part solute, further purifies water.In the time of need to sampling, open the trip switch on sampling plug, with glass needle tubing, slowly extract appropriate solution for detection of analysis, closing control switch after extraction.
Visible, this experiment column device novel structure, simple to operate, easy to use, repairs underground water technology for research permeable reaction wall good means is provided, and estimates after release the popular welcome being subject in the industry.
Accompanying drawing explanation
Fig. 1 is the experiment column device structural representation of the utility model simulation permeable reaction wall.
Fig. 2 is the experiment column device cross-sectional schematic of the utility model simulation permeable reaction wall.
Fig. 3 is the sampling plug construction schematic diagram of the utility model device.
Embodiment
As Fig. 1, Fig. 2, shown in Fig. 3, the experiment column device of the simulation permeable reaction wall of the present embodiment, comprise: the permeable reaction post 1 that pollutes solute for removing underground water, for improving the sand-gravel cushion of fluidised form, for preventing the sandy gravel protective layer of current scour, and cylindrical shell 4, sand-gravel cushion, permeable reaction post 1, sandy gravel protective layer being arranged in cylindrical shell from bottom to top, the bottom of cylindrical shell 4 offers water inlet 6-1, top offers water outlet 6-2, sidewall offers thief hole 6, on thief hole 6, be connected to sampling plug 5.As shown in Figure 3, sampling plug 5 is comprised of chimney filter 5-1, sampling syringe needle 5-2 and trip switch 5-3, and wherein chimney filter 5-1 is threaded with thief hole 6.Cylindrical shell 4 is connected to form by upper, middle and lower segment plexi-glass tubular; the in-built sandy gravel protective layer of epimere plexi-glass tubular; the in-built permeable reaction post 1 of stage casing plexi-glass tubular; the in-built sand-gravel cushion of hypomere plexi-glass tubular; between connected plexi-glass tubular, by flange 7-1, be fixedly connected with bolt 7-2, flange connections is provided with silicagel pad for waterproof.The sidewall of epimere plexi-glass tubular offers a thief hole, and the sidewall of stage casing plexi-glass tubular offers 3 thief holes of axial distribution, and the sidewall of hypomere plexi-glass tubular offers a thief hole.3 thief holes are evenly arranged in permeable reaction shell of column, and all the other 2 thief holes lay respectively at sand-gravel cushion and sandy gravel protective layer position.
In the present embodiment as shown in Figure 2, sand-gravel cushion is cylindrical, diameter 5cm, and height 15cm, and there is three-decker, and bottom is thick bed course 2-1, the ovum gravel that the about 10cm of thickness is 2.0-3.0cm by particle size range forms; Middle layer is First Transition layer 2-2, and the ovum gravel that the about 4cm of thickness is 0.5-1.0cm by particle size range forms; Top layer is thin bed course 2-3, the about 1cm of thickness, and the quartz sand that is 0.05-0.1cm by particle size range forms.Wherein, the Main Function of thick bed course 2-1 is that the water column that becomes a mandarin is tentatively discrete; The Main Function of First Transition layer 2-2 is further discrete current, makes fluidised form trend evenly; The Main Function of thin bed course 2-3 is balanced current and impurity screening.Sandy gravel protective layer is right cylinder, diameter 5cm, and height 15cm, has double-layer structure, and lower floor is the second transition layer 3-1 that 5cm is thick, and particle size range is 0.5-1.0cm; Upper strata is the ballast layer 3-2 that 10cm is thick, and particle size range is 0.05-0.1cm.The Main Function of sandy gravel protective layer is to improve flow condition and prevent from testing reaction material in cylinder to run off.
The permeable reaction post that this example adopts is reduction swage reaction column, diameter 5cm, and height 20cm, mixes formation by Fe/Ni bimetallic material (reductibility iron powder mixings trace metal Ni, Ni is as catalyzer, Ni content is 2%-5%), quartz sand particle.Permeable reaction post is mainly used in removing the pollutent (chlorobenzene compound) in underground water, mixes a small amount of quartz sand particle mixing, and can increase Fe/Ni bimetal cylinder perviousness.
The object of this experimental installation is to measure the removal effect of permeable reaction wall to chlorobenzene compound by sample mode, checks the time of break-through of permeable reactive barrier simultaneously.
In experimentation, containing chlorobenzene compound solution, from synthetic glass column bottom water inlet 6-1, flow into, after sand-gravel cushion, solution evenly infiltrates permeable reaction column 1.Under metal Ni katalysis, iron powder, water and chlorobenzene compound generation redox reaction, final chlorobenzene compound dechlorination, concentration reduces, and is converted into the compound that other toxicity are lower, the Fe (OH) that simultaneous reactions generates
3adsorbable part solute, further purifies water.
During sampling, open the trip switch on sampling plug, with glass needle tubing, slowly extract appropriate solution for detection of analysis, closing control switch after extraction.
The utility model is not limited to above-described embodiment.All employings are equal to replaces the technical scheme forming, and all drops on the protection domain of the utility model requirement.
Claims (7)
1. an experiment column device of simulating permeable reaction wall; it is characterized in that comprising: for removing underground water, pollute the permeable reaction post of solute, for improving the sand-gravel cushion of fluidised form, for preventing sandy gravel protective layer and the cylindrical shell of current scour; described sand-gravel cushion, permeable reaction post, sandy gravel protective layer being arranged in cylindrical shell from bottom to top; the bottom of described cylindrical shell offers water inlet; top offers water outlet; sidewall offers thief hole, is connected to sampling plug on described thief hole.
2. the experiment column device of simulating according to claim 1 permeable reaction wall, is characterized in that: described permeable reaction post is reduction swage reaction column.
3. the experiment column device of simulating according to claim 1 permeable reaction wall, is characterized in that: described sand-gravel cushion has three-decker, and bottom is thick bed course, and particle size range is 2.0-3.0cm; Middle layer is transition layer, and particle size range is 0.5-1.0cm; Top layer is thin bed course, and particle size range is 0.05-0.1cm.
4. the experiment column device of simulating according to claim 1 permeable reaction wall, is characterized in that: described sandy gravel protective layer has double-layer structure, and lower floor is transition layer, and particle size range is 0.5-1.0cm; Upper strata is ballast layer, and particle size range is 0.05-0.1cm.
5. simulate according to claim 1 the experiment column device of permeable reaction wall; it is characterized in that: described cylindrical shell is connected to form by upper, middle and lower segment plexi-glass tubular; the in-built grittiness stone of epimere plexi-glass tubular protective layer; permeable reaction post is housed in the plexi-glass tubular of stage casing; the in-built grittiness stone of hypomere plexi-glass tubular bed course; between connected plexi-glass tubular, by flange, be fixedly connected with bolt, flange connections is provided with silicagel pad for waterproof.
6. simulate according to claim 1 the experiment column device of permeable reaction wall, it is characterized in that: the sidewall of epimere plexi-glass tubular offers a thief hole, the sidewall of stage casing plexi-glass tubular offers 3 thief holes of axial distribution, and the sidewall of hypomere plexi-glass tubular offers a thief hole.
7. the experiment column device of simulating according to claim 1 permeable reaction wall, is characterized in that: described sampling plug is comprised of chimney filter, sampling syringe needle and trip switch, and wherein chimney filter is threaded with thief hole.
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| CN201320578752.7U CN203461867U (en) | 2013-09-18 | 2013-09-18 | Experimental column device capable of simulating permeable reactive wall |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671438A (en) * | 2015-03-05 | 2015-06-03 | 江苏菲力环保工程有限公司 | Permeable reactive barrier device for underground water treatment |
| CN107540128A (en) * | 2017-09-30 | 2018-01-05 | 中国地质大学（武汉） | The device of the simulation PRB in-situ immobilization heavy metal pollution underground water containing packing material |
| CN111807437A (en) * | 2020-07-20 | 2020-10-23 | 四川省冶勘设计集团有限公司 | Modular PRB repairing method with environment risk control function |
| CN111924927A (en) * | 2020-08-04 | 2020-11-13 | 安徽省环境科学研究院 | Method for treating nitrite in underground water based on PRBS technology |
-
2013
- 2013-09-18 CN CN201320578752.7U patent/CN203461867U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671438A (en) * | 2015-03-05 | 2015-06-03 | 江苏菲力环保工程有限公司 | Permeable reactive barrier device for underground water treatment |
| CN104671438B (en) * | 2015-03-05 | 2017-02-08 | 江苏菲力环保工程有限公司 | Permeable reactive barrier device for underground water treatment |
| CN107540128A (en) * | 2017-09-30 | 2018-01-05 | 中国地质大学（武汉） | The device of the simulation PRB in-situ immobilization heavy metal pollution underground water containing packing material |
| CN111807437A (en) * | 2020-07-20 | 2020-10-23 | 四川省冶勘设计集团有限公司 | Modular PRB repairing method with environment risk control function |
| CN111924927A (en) * | 2020-08-04 | 2020-11-13 | 安徽省环境科学研究院 | Method for treating nitrite in underground water based on PRBS technology |
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