CN203461868U - Indoor experimental system capable of simulating permeable reactive wall - Google Patents
Indoor experimental system capable of simulating permeable reactive wall Download PDFInfo
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- CN203461868U CN203461868U CN201320583241.4U CN201320583241U CN203461868U CN 203461868 U CN203461868 U CN 203461868U CN 201320583241 U CN201320583241 U CN 201320583241U CN 203461868 U CN203461868 U CN 203461868U
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Abstract
The utility model relates to an indoor experimental system capable of simulating a permeable reactive wall to remove polluting solutes in underground water. The system comprises a liquid supply bag, a water inlet tube with flow control function, an experimental column device which simulates the permeable reactive wall, a waste liquid collecting barrel and an adsorbing bag sequentially connected. The experimental column device comprises a permeable reactive column, a sand gravel cushion layer, a sand gravel protective layer and a columnar shell. The sand gravel cushion layer, the permeable reactive column and the a 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 the sampling port is connected with a sampling plug. The system provided by the utility model aims to measure the dechlorinating effect on 1,2-dichlorobenzene in underground water by the permeable reactive wall, and meanwhile detect the penetration time of the permeable reactive wall. Therefore, the experimental column device is novel in structure, simple to operate and convenient to use, and provides a good means for researching a technology of repairing underground water by the permeable reactive wall.
Description
Technical field
The utility model relates to a kind of laboratory experiment system of simulating permeable reaction wall, can be used for removing in underground water the organic solutes such as chlorobenzene class and pollutes, and belongs to Remedy Technology of Contaminated Groundwater 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 body 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 laboratory experiment system of simulating permeable reaction wall, for removing the organic solutes such as underground water chlorobenzene class (as 1,2-dichlorobenzene).
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of permeable reaction wall of simulating is removed the laboratory experiment system of polluting solute in underground water, it is characterized in that comprising: connect successively for maintaining the feed flow bag of constant head, water inlet pipe with flow control, the experiment column device of simulation permeable reaction wall, for storing the waste collection bucket of experiment column device effluent liquid, for absorbing the absorbent packet of waste gas, the experiment column device of described simulation permeable reaction wall forms and comprises: 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, on described water inlet pipe, be provided with for reading the counter of flow.Described counter adopts Fundamentals of Mono-Chip Computers, for recording transfusion device per minute for number of drops, thereby calculates transfusion device for flow quantity.
2, described feed flow bag is medical infusion soft bag.Can repeat fillingly, Main Function is solution is housed in experimentation, keeps constant head, simulation fix-head border.Feed flow bag material adopts non-PVC medical films, and in lasting feed flow process, soft bag is long-pending can be changed with solution, thereby avoid air to enter, causes volatilization.Described water inlet pipe adopts precisive infusion device, utilizes the flow of the flow valve control feed flow of transfusion device, analogue flow rate border.
3, 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.
4, 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.
5, 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.
6, 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.
7, 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.
8, described sampling plug is comprised of chimney filter, sampling syringe needle and trip switch, and wherein chimney filter is threaded with thief hole.
9, described waste collection bucket adopts PC material pure water barrel, and top adds rubber stopper seal; Described absorbent packet is equipped with active carbon adsorption material.The effluent liquid of permeable reaction wall device flows into waste collection bucket by the road; Volatility waste gas enters absorbent packet, and waste gas is discharged laboratory after charcoal absorption purifies.
The object of this experimental installation is to measure the removal effect of permeable reactive barrier to chlorobenzene compound (1,2-dichlorobenzene) 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 laboratory experiment system schematic of the utility model simulation permeable reaction wall.
Fig. 2 is the experiment column device structural representation of simulation permeable reaction wall.
Fig. 3 is the experiment column device cross-sectional schematic of simulation permeable reaction wall.
Fig. 4 is sampling plug construction schematic diagram.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, the present embodiment simulation permeable reaction wall is removed the laboratory experiment system of polluting solute in underground water, for underground water 1, the dechlorination of 2-dichlorobenzene, form comprise connect successively for maintaining the feed flow bag 8 of constant head, water inlet pipe 9 with flow control, the experiment column device 10 of simulation permeable reaction wall, for storing the waste collection bucket 11 of experiment column device 10 effluent liquid, for absorbing the absorbent packet 12 of waste gas, the experiment column device of the simulation permeable reaction wall of the present embodiment, as shown in Figures 2 to 4, comprising: 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, and top offers water outlet 6-2, and sidewall offers thief hole 6, is connected to sampling plug 5 on thief hole 6.As shown in Figure 4, 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 3, 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 (1,2-dichlorobenzene) in underground water, mixes a small amount of quartz sand particle mixing, and can increase Fe/Ni bimetal cylinder perviousness.
In the present embodiment, on described water inlet pipe 9, be provided with for reading the counter 13 of flow.Counter 13 adopts electronic counter, is suspended on transfusion device form, and monitoring per minute is for number of drops, by calculating for flow quantity for drop speed.Feed flow bag 8 adopts medical infusion soft bag, and capacity is 1000ml, can repeat filling.In experimentation, feed flow bag 8 volumes change with solution, guarantee that inside and outside soft bag be normal atmosphere, maintain the constant head of feed flow, avoid air to enter simultaneously and cause 1, thereby the volatilization of 2-dichlorobenzene reduces strength of solution.Water inlet pipe 9 adopts essence amount transfusion device, utilizes the experiment of transfusion device on-off control for flow quantity.Waste collection bucket adopts PC material pure water barrel, and top adds rubber stopper seal; Described absorbent packet is equipped with active carbon adsorption material.
In experimentation, in feed flow bag 8, contain 1,2-dichlorobenzene solution flows into the experiment column device 10 of simulation permeable reaction wall from synthetic glass column bottom water inlet 6-1 through water inlet pipe 9, after sand-gravel cushion, solution evenly infiltrates Fe/Ni bimetal permeable reaction post 1.Under metal Ni katalysis, iron powder, water and chlorobenzene compound generation redox reaction, final chlorobenzene compound generation dechlorination reaction, concentration reduces, the Fe (OH) that simultaneous reactions generates
3adsorbable part solute, further purifies water.The effluent liquid of permeable reaction post flows into waste collection bucket by the road; Volatility waste gas enters absorbent packet, and waste gas is discharged laboratory after charcoal absorption purifies.
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 (10)
1. simulate the laboratory experiment system of polluting solute in permeable reaction wall removal underground water for one kind, it is characterized in that comprising: connect successively for maintaining the feed flow bag of constant head, water inlet pipe with flow control, the experiment column device of simulation permeable reaction wall, for storing the waste collection bucket of experiment column device effluent liquid, for absorbing the absorbent packet of waste gas, the experiment column device of described simulation permeable reaction wall forms and comprises: 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.
2. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, it is characterized in that: on described water inlet pipe, be provided with for reading the counter of flow, described counter adopts Fundamentals of Mono-Chip Computers, be used for recording transfusion device per minute for number of drops, thereby calculate transfusion device for flow quantity.
3. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, it is characterized in that: described feed flow bag is medical infusion soft bag; Described water inlet pipe adopts precisive infusion device.
4. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, it is characterized in that: described permeable reaction post is reduction swage reaction column.
5. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, it is characterized in that: described sand-gravel cushion has three-decker, 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.
6. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, it is characterized in that: described sandy gravel protective layer has double-layer structure, 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.
7. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water; 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.
8. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, 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.
9. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, it 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.
10. simulate according to claim 1 permeable reaction wall and remove the laboratory experiment system of polluting solute in underground water, it is characterized in that: described waste collection bucket adopts PC material pure water barrel, and top adds rubber stopper seal; Described absorbent packet is equipped with active carbon adsorption material.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967358A (en) * | 2016-06-08 | 2016-09-28 | 水利部交通运输部国家能源局南京水利科学研究院 | Waste liquid and gas collecting device of small underground water seepage physical model |
| CN106630235A (en) * | 2017-01-24 | 2017-05-10 | 成都理工大学 | Indoor experiment device for simulating polluted underground water flowing through permeable reaction wall |
| CN110850055A (en) * | 2019-10-30 | 2020-02-28 | 东南大学 | Indoor simulation PRB technique's small-size post test device |
| CN111272613A (en) * | 2020-03-27 | 2020-06-12 | 河海大学 | PRB indoor test device system capable of adjusting multiple influence factors |
-
2013
- 2013-09-18 CN CN201320583241.4U patent/CN203461868U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967358A (en) * | 2016-06-08 | 2016-09-28 | 水利部交通运输部国家能源局南京水利科学研究院 | Waste liquid and gas collecting device of small underground water seepage physical model |
| CN106630235A (en) * | 2017-01-24 | 2017-05-10 | 成都理工大学 | Indoor experiment device for simulating polluted underground water flowing through permeable reaction wall |
| CN106630235B (en) * | 2017-01-24 | 2023-10-31 | 成都理工大学 | Indoor experimental device for simulating polluted groundwater to flow through permeable reactive barrier |
| CN110850055A (en) * | 2019-10-30 | 2020-02-28 | 东南大学 | Indoor simulation PRB technique's small-size post test device |
| CN111272613A (en) * | 2020-03-27 | 2020-06-12 | 河海大学 | PRB indoor test device system capable of adjusting multiple influence factors |
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