CN211688742U - In-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification - Google Patents
In-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification Download PDFInfo
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- CN211688742U CN211688742U CN201922250280.2U CN201922250280U CN211688742U CN 211688742 U CN211688742 U CN 211688742U CN 201922250280 U CN201922250280 U CN 201922250280U CN 211688742 U CN211688742 U CN 211688742U
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Abstract
The utility model discloses a sediment heavy metal pollution administers normal position repair system who unites dehydration solidification, it includes the EKG drain bar, the drainage branch pipe, the drainage is responsible for, vacuum water gas separator, electrode connecting circuit, the vacuum pump, the suction pump, heavy metal administers reagent addition system, the base plate of EKG drain bar is inserted in the sediment, vacuum gas water separator has the water inlet, extraction opening and pumping port, the water inlet is responsible for detachably with the drainage and is connected, extraction opening and vacuum pump connection, the pumping port is connected with the suction pump, heavy metal administers reagent addition system and includes the container and the reagent pump that the splendid attire has reagent, the container passes through the pipeline and is connected with the input of reagent pump, the output and the drainage of reagent pump are responsible for and are connected, supreme sand cushion layer that covers in proper order down on the sediment of pending, cloth layer. The utility model discloses a continuous drainage among the heavy metal bed mud processing has shortened bed mud curing cycle, has improved the bed mud and has consolidated the effect, has reduced the solidification cost.
Description
Technical Field
The utility model relates to a bed mud heavy metal pollution administers and dewaters the technical field who solidifies.
Background
Unlike organic matter, heavy metals cannot be degraded by microorganisms and can be enriched in organisms, so that heavy metal pollutants are potentially harmful. Sediment formed by mixing silt, clay, organic matters and various minerals is deposited at the bottom of the water body through a series of physical chemistry, biology, water body transmission and other actions. Once entering the water body, the heavy metals can be enriched in the bottom mud on the surface layer of the riverbed through the actions of adsorption, complexation, precipitation and the like, and the content of the heavy metals in the bottom mud can exceed the content of the overlying water body by several orders of magnitude, so that the heavy metals become a storage warehouse and a destination of the heavy metals in the water body. Heavy metals in the bottom sediment have the characteristics of irreversibility, long-term property and the like, when environmental conditions change, part of heavy metals can be released from the bottom sediment through the actions of desorption, dissolution, oxidation reduction and the like, so that the concentration of the heavy metals in a water body solution is increased, and secondary pollution of the water body is caused. The continuous accumulation of heavy metals in the bottom mud not only poses serious threats to aquatic organisms, drinking water of residents along rivers and safe irrigation of farmlands, but also can damage human health through a food chain. Therefore, safe disposal of the heavy metal polluted bottom mud is particularly necessary.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a system and method that realize sediment heavy metal pollution improvement and dehydration solid method simultaneously.
In order to achieve the above object, the utility model adopts the following technical scheme:
the in situ repair system that the solidification is jointly dehydrated in sediment heavy metal pollution treatment, it includes: an EKG drainage plate, a drainage branch pipe, a main drainage pipe, a vacuum water-gas separator, an electrode connecting circuit, a vacuum pump, a water pump and a heavy metal treatment reagent adding system,
the base plate of the EKG drainage plate is inserted into the sediment to be treated which is pumped away the river water, the plate head of the EKG drainage plate penetrates through the sand cushion layer laid on the sediment and is connected with the drainage branch pipe, the electrode of the EKG drainage plate is connected with the electrode connecting circuit,
a plurality of drainage branch pipes are gathered in a drainage main pipe, the drainage main pipe is provided with a pipe joint which can be detachably connected,
the vacuum gas-water separator is provided with a water inlet, an air exhaust port and a water pumping port, the water inlet is detachably connected with a pipe joint of the main drainage pipe, the air exhaust port is connected with the vacuum pump through a pipeline, the water pumping port is connected with the water pumping pump,
heavy metal is administered reagent addition system and is included the container and the reagent pump that are equipped with the reagent that is used for heavy metal to administer, and the container passes through the pipeline to be connected with the input of reagent pump, and the output of reagent pump is connected with the coupling of dismantling the connection of drainage person in charge, and from supreme sand bedding course, geotechnological cloth layer and the vacuum seal rete that has covered in proper order down on the sediment of awaiting treatment.
Preferably, the EKG drainage plates are arranged at a position which is one third of the distance from the two ends of the river at a transverse interval of 1m, are vertically inserted into the heavy metal polluted bottom sediment to be treated, and are respectively connected with the direct current stabilized power supply through leads.
Preferably, the EKG drainage plate is inserted into the bottom end of the sediment for sealing.
Preferably, the vacuum sealed membrane layer is compacted peripherally with bagged soil.
Preferably, the main drainage pipe is arranged in the sand cushion layer.
Preferably, two adjacent EKG drainage plates are connected with the three-way sealing joint through PVC steel wire hoses, the three-way sealing joint is communicated together through the PVC steel wire hoses to serve as a drainage branch pipe, and each drainage branch pipe is collected to the drainage main pipe through a special small four-way joint.
Preferably, the main drain pipe is provided with a plurality of small holes for connecting with the branch drain pipes.
The utility model discloses the dehydration solidification and the heavy metal pollution of the mode of utilizing the electric osmosis to unite vacuum preloading realize the bed mud simultaneously administer, let in heavy metal treatment reagent through the EKG drain bar earlier before the evacuation, carry out the evacuation again afterwards, heavy metal ion in the bed mud receives the electromagnetic field effect and gathers in the drain bar, discharges through drainage channel with the free water in the bed mud under the effect of vacuum negative pressure. The water molecules have polarity, and move from the anode to the cathode under the action of electroosmosis, so that the electroosmosis increases the activity of the water molecules, accelerates the permeation speed, promotes weak bound water in the sediment to be separated from the constraint of sediment particles, further reduces the water content of the sediment, and accelerates drainage.
The utility model discloses a vacuum preloading is united to the electroosmosis has realized the continuous drainage in the heavy metal bed mud processing, has shortened bed mud curing cycle, has improved the bed mud and has consolidated the effect, has reduced the solidification cost, and its processing equipment is few, easy operation, application scope are wide, the technology is ripe, has better market perspective.
Drawings
FIG. 1 is a schematic perspective view of the integrated in-situ remediation system for treating heavy metal pollution from bottom sediment in combination with dehydration and solidification.
Fig. 2 is a schematic elevation view showing the distribution of the bottom mud, the sand cushion layer, the geotextile layer and the vacuum sealing membrane layer.
FIG. 3 is a schematic plan view of EKG drainage plate and sampling points for measuring sediment after solidification and remediation.
FIG. 4 is a schematic elevation view of a vacuum moisture separator.
FIG. 5a is a schematic front view of an EKG drainage plate.
FIG. 5b is a schematic top view of an EKG drainage plate.
Wherein: 1-bottom sediment, 2-EKG drainage plate, 2.1-substrate, 2.2-electrode, 3-sand cushion layer, 4-lead, 5-direct current stabilized voltage supply, 6-universal meter, 7-geotextile layer, 8-vacuum sealing film layer, 9-bagged soil, 10-PVC steel wire hose, 11-three-way sealing joint, 12-drainage branch pipe, 13-special small four-way, 14-drainage main pipe, 15-vacuum water-gas separator, 15.1-water inlet, 15.2-air exhaust port, 15.3-water exhaust port, 15.4-water level line in box, 15.5-base, 15.6-pressure sensor, 15.7-check valve, 16-vacuum pump, 17-vacuum pipe, 18-water pump, 19-water pipe, 20-bottom sediment surface, 21-sampling point position after solidification, 22-container.
Detailed Description
As shown in figure 1, the utility model discloses a bed mud heavy metal pollution administers normal position repair system who unites dehydration solidification, it includes: the device comprises an EKG drainage plate, a drainage branch pipe, a main drainage pipe, a vacuum water-gas separator, an electrode connecting circuit, a vacuum pump, a water suction pump, a heavy metal treatment reagent adding system and the like.
The EKG drainage plate comprises a base plate, copper wires, a filter membrane and the like, wherein grooves are formed in two surfaces of the base plate, the base plate is made of conductive plastic, and the copper wires penetrate through the base plate. The EKG drainage plate is not easy to corrode, has the functions of electric conduction, filtration and drainage, and therefore can be used as an electrode and a channel for draining water and transmitting vacuum degree. The base plate 2.1 of the EKG drainage plate 2 is inserted into the sediment to be treated, the plate head of the EKG drainage plate penetrates through the sand cushion laid on the sediment and is connected with the drainage branch pipe 12, and the electrode 2.2 of the EKG drainage plate is connected with the electrode connecting circuit. The several branch drains converge into a main drain pipe 14 having a detachably connected pipe connection.
The vacuum gas-water separator 15 is provided with a water inlet 15.1, an air suction port 15.2 and a water pumping port 15.3, the water inlet 15.1 is detachably connected with a pipe joint of the main drainage pipe, the air suction port is connected with a vacuum pump 17 through a pipeline, and the water pumping port is connected with a water pumping pump 18.
The heavy metal treatment reagent adding system comprises a container 22 containing a reagent for heavy metal treatment and a reagent pump, wherein the container is connected with the input end of the reagent pump through a pipeline, and the output end of the reagent pump is connected with a detachable connected pipe joint of a main drainage pipe.
The surface of the sediment 1 to be treated is sequentially covered with a sand cushion layer 3, a geotextile layer 7 and a vacuum sealing film layer 8 from bottom to top.
The utility model discloses implement according to following step:
(1) pumping away the river water where the sediment to be treated is located;
(2) sealing the bottom end of the EKG drainage plate 2, inserting the EKG drainage plate, taking the EKG drainage plate 2 as an anode and a cathode, arranging the EKG drainage plate at a position which is one third away from each of two ends of the river at a transverse interval of 1m, and vertically inserting the EKG drainage plate into the sediment 1 to be treated;
(3) arranging a sand cushion layer 3 with the height of 500mm, a geotextile layer 7 with the height of 200mm and a vacuum sealing film layer 8 with the height of 10mm on the surface of the bottom mud 1 to be treated from bottom to top according to requirements, and compacting the periphery of the vacuum sealing film layer by using bagged soil;
(4) the plate head of the EKG drainage plate penetrates through the sand cushion layer and is connected with the drainage branch pipe, and the electrode of the EKG drainage plate is connected with a direct current stabilized voltage power supply 5 and a universal meter 6 through a lead 4; every two EKG drainage plates 2 are connected with a three-way sealing joint 11 by a PVC steel wire hose 10, all the EKG drainage plates 2 are connected in sequence, then the three-way sealing joint 11 is connected together by the PVC steel wire hose 10 to be used as a drainage branch pipe 12, and each drainage branch pipe 12 is collected into a drainage main pipe 14 by a special small four-way joint 13;
(5) connecting a container of a heavy metal treatment reagent adding system with a reagent pump, and sequentially injecting MgCl with the concentration of 0.5mol/L into the container2KCl of 0.25mol/L, Na of 0.1mol/L2SO4After the injection of each reagent into the drainage plate is finished, injecting the next reagent into the drainage plate to help the release of heavy metals in the bottom mud;
(6) connecting the main drainage pipe with a reagent pump of a heavy metal treatment reagent adding system through a pipeline, and adding a reagent which is beneficial to the release of heavy metal in bottom mud into a drainage channel of the EKG drainage plate through the main drainage pipe and the branch drainage pipe;
(7) after the reagent reacts with the substances in the bottom mud for one day, the connection between the main drainage pipe and the heavy metal treatment reagent adding system is dismantled;
(8) connecting a main drainage pipe arranged on the sand cushion layer to a water inlet of a vacuum water-gas separator through a pipeline positioned outside a sealing film, connecting a vacuum pump to a pumping port of the vacuum water-gas separator through a vacuum pipe, and connecting a water suction pump to a pumping port of the vacuum water-gas separator through a water pipe;
(9) starting a vacuum pump for vacuumizing, and monitoring the drainage and solidification state of the bottom mud in real time;
(10) when the water level in the vacuum water-gas separator is higher than three-quarter of the water tank height, a water suction pump is started, and when the water level is lower than one-quarter of the water tank height, the water suction pump is closed;
(11) when the solidification degree of the bottom mud reaches the design requirement, stopping the machine;
(12) and respectively testing the water content, the heavy metal content, the pH value and the cross shear strength of the bottom mud at different distances from the surface layer, the middle layer and the bottom layer of the solidified bottom mud to the anode and the cathode of the drainage plate, and delivering the extracted heavy metal-containing sewage to qualified companies for further treatment.
Claims (7)
1. The in situ remediation system of sediment heavy metal pollution improvement joint dehydration solidification, its characterized in that includes: an EKG drainage plate, a drainage branch pipe, a main drainage pipe, a vacuum water-gas separator, an electrode connecting circuit, a vacuum pump, a water pump and a heavy metal treatment reagent adding system,
the base plate of the EKG drainage plate is inserted into the sediment to be treated which is pumped away the river water, the plate head of the EKG drainage plate penetrates through the sand cushion layer laid on the sediment and is connected with the drainage branch pipe, the electrode of the EKG drainage plate is connected with the electrode connecting circuit,
a plurality of drainage branch pipes are gathered in a drainage main pipe, the drainage main pipe is provided with a pipe joint which can be detachably connected,
the vacuum gas-water separator is provided with a water inlet, an air exhaust port and a water pumping port, the water inlet is detachably connected with a pipe joint of the main drainage pipe, the air exhaust port is connected with the vacuum pump through a pipeline, the water pumping port is connected with the water pumping pump,
the heavy metal treatment reagent adding system comprises a container filled with a reagent for heavy metal treatment and a reagent pump, the container is connected with the input end of the reagent pump through a pipeline, the output end of the reagent pump is connected with a pipe joint which is detachably connected with the main drainage pipe,
the bottom mud to be treated is sequentially covered with a sand cushion layer, a geotextile layer and a vacuum sealing film layer from bottom to top.
2. The in-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification according to claim 1, wherein: the EKG drainage plates are arranged at a position which is one third of the distance from the two ends of the river at a transverse interval of 1m, are vertically inserted into the heavy metal polluted bottom mud to be treated, and are respectively connected with a direct current stabilized power supply through leads.
3. The in-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification according to claim 1, wherein: and the EKG drainage plate is inserted into the bottom mud for sealing treatment.
4. The in-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification according to claim 1, wherein: the periphery of the vacuum sealing film layer is compacted by bagged soil.
5. The in-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification according to claim 1, wherein: the main drainage pipe is arranged in the sand cushion layer.
6. The in-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification according to claim 1, wherein: two adjacent EKG drainage plates are connected with the three-way sealing joint through PVC steel wire hoses, the three-way sealing joint is communicated together through the PVC steel wire hoses to serve as a drainage branch pipe, and each drainage branch pipe is collected to the main drainage pipe through a special small four-way joint.
7. The in-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification according to claim 6, wherein: the main drainage pipe is provided with a plurality of small holes for connecting with the branch drainage pipes.
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| CN201922250280.2U CN211688742U (en) | 2019-12-13 | 2019-12-13 | In-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification |
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| CN201922250280.2U CN211688742U (en) | 2019-12-13 | 2019-12-13 | In-situ remediation system combining bottom sediment heavy metal pollution treatment with dehydration and solidification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111018278A (en) * | 2019-12-13 | 2020-04-17 | 中交四航工程研究院有限公司 | In-situ remediation system and method combining bottom sediment heavy metal pollution treatment with dehydration and solidification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111018278A (en) * | 2019-12-13 | 2020-04-17 | 中交四航工程研究院有限公司 | In-situ remediation system and method combining bottom sediment heavy metal pollution treatment with dehydration and solidification |
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