CN210117331U - Sludge modification-restoration integrated system based on electrochemical treatment - Google Patents
Sludge modification-restoration integrated system based on electrochemical treatment Download PDFInfo
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- CN210117331U CN210117331U CN201920484451.5U CN201920484451U CN210117331U CN 210117331 U CN210117331 U CN 210117331U CN 201920484451 U CN201920484451 U CN 201920484451U CN 210117331 U CN210117331 U CN 210117331U
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Abstract
The utility model relates to a silt solidification, restoration processing method especially relates to a silt modification-restoration integrated system based on electrochemical treatment. The utility model relates to a silt is modified-restores integrated system based on electrochemical treatment, including electrode tube one, electrode tube two, wire, DC power supply, logical liquid pipe, feed liquor pipe, drain pipe, electrolyte bath, electrode switch. The electrode tube I and the electrode tube II are respectively connected with a direct current power supply through leads and adjust the anode and the cathode of the electrode tube through electrode switches, the electrode tube I and the electrode tube II are arranged in a hexagon, the electrode tube II is arranged at the central point of the hexagon, and the electrode tube I is arranged on the vertex of the hexagon. Electrolyte is filled in the electrode tube I and the electrode tube II, and the reinforcement and improvement of the sludge with high water content and the repair treatment of the polluted sludge are realized by utilizing different electrifying modes and functions of a backfill material regulation system around the electrode tube.
Description
Technical Field
The utility model relates to a silt solidification, restoration processing method especially relates to a silt modification-restoration integrated system based on electrochemical treatment, belongs to silt solidification technical field.
Background
Along with the development process of economy and environment, a great amount of dredged sludge appears in rivers, lakes, ponds and seashores, and the hydraulic fill sludge has high water content and long natural drainage consolidation time, so that the stacking time is long and the engineering period is long. The water in the sludge mainly exists in the forms of interstitial water, capillary bound water, weak bound water and strong bound water; (1) interstitial water: is mainly surrounded by sludge particles, but is not directly combined with the particles of the sludge itself; (2) capillary bound water: comprises wedge-shaped capillary bonded water formed on the contact surface of solid particles under the action of capillary pressure and fracture capillary bonded water existing in the fracture of the solid; (3) weakly bound water: water adsorbed by the surface tension of particles having a large specific surface area; (4) strongly bound water: refers to water inside the microbial cells.
In the method of sludge treatment, natural drying, vacuum preloading, filter-press dewatering, electroosmotic dewatering, and the like are generally used. The natural drying refers to dewatering by utilizing the natural gravity of the sludge, and has large occupied area and long dewatering time. Traditional vacuum pre-pressing indicates that the plastic drainage plate is inserted into soft soil foundations such as silt and the like with high clay content according to the layout structure with the longitudinal and transverse spacing of about 0.8-1.2m, under the action of vacuum pressure, water in silt soil is drained to an upper drainage pipe through the drainage plate and then drained into a drainage ditch, and therefore the purpose of accelerating consolidation of the soft soil foundation is achieved, and although the drainage time is shortened to a certain extent in the drainage mode, only gap water in the silt can be treated, and silt soil property cannot be improved and repaired. The filter-pressing dehydration is precipitated through adding lime, gets into the filter-pressing dehydration of pressure filter, can effectual improvement dewatering effect, plays certain silt improvement effect, but for a large amount of silt once the handling capacity is less, silt pollutant can only play stably, can not reduce. The electroosmosis dehydration method is characterized in that a metal electrode is inserted into soil and direct current is conducted, under the action of an electric field, water in the soil flows from an anode to a cathode, electroosmosis is generated, so that the high water content of high-viscosity soil is reduced, the content of free heavy metal pollutants can be properly reduced, but the dehydration degree of sludge near the cathode is not high due to the fact that the water flows from the anode to the cathode, soil bodies near the anode of the cathode settle unevenly, large cracks can be formed between the electrode and the soil bodies, only a small section of area contacts the electrode when the soil bodies are serious, large contact resistance is formed, the electroosmosis strengthening effect is influenced, electrode materials adopted by electroosmosis are mostly metal, corrosion is easy, the conductivity is reduced.
Therefore, the developed sludge modification and repair treatment method with higher dehydration rate has certain production and application values.
Disclosure of Invention
To mechanical dehydration treatment silt dehydration efficiency general, the improvement effect is not good, the later stage soil body of tradition electroosmosis is easily cracked and is leaded to the resistance increase, the negative pole goes out water and leads to subsiding inhomogeneous, the electrode is perishable scheduling problem, the utility model provides a silt modification restoration integrated system and operation method based on electrochemical treatment has reduced interface resistance and electrode corrosion degree between electrode-the soil body, reduces the uneven settlement that brings after the soil body ftractures and handles, improves the dehydration efficiency, can carry out soil granule composition improvement and solidification to clay content height, moisture content height, the difficult silt of drainage, also can effectively solve the problem that silt heavy metal exceeds standard simultaneously, concrete scheme is as follows:
a sludge modification-restoration integrated system based on electrochemical treatment comprises a second electrode tube, a lead, a direct current power supply and a first electrode tube, the first electrode tube and the second electrode tube are respectively connected with a direct current power supply through leads, the first electrode tube is connected with a direct current power supply through a lead, the electrode tube II is connected through a lead, the electrode tube I and the electrode tube II are arranged in a hexagon shape, the electrode tube II is arranged at the center point of the hexagon, the electrode tube I is arranged on the vertex of the hexagon, the first electrode tube comprises a first electrode, a blocking tube and a first liquid passing tube, the first electrode tube is connected with the first electrolytic cell through the first liquid passing tube, the first liquid passing pipe comprises a first liquid inlet pipe and a first liquid outlet pipe, the second electrode pipe comprises a second electrode, a blocking pipe and a second liquid passing pipe, and the second electrode pipe is connected with a second electrolyte tank through a second liquid inlet pipe, and the second liquid inlet pipe and the second liquid outlet pipe are arranged in the second liquid inlet pipe.
The blocking pipe is a plastic filter pipe wrapped by 500-mesh geotechnical filter cloth, the bottom end with the diameter of 3-6cm is a closed end, sludge can be blocked from passing through, and water molecules cannot be blocked from passing through.
And the lead is provided with an electrode switch.
And the first liquid inlet pipe and the second liquid inlet pipe are provided with electrolyte switches.
The blocking pipe and the first electrode pipe are integrally designed, and the blocking pipe and the second electrode pipe are integrally designed.
The anode electrolytic cell and the cathode electrolytic cell are higher than the top end of the electrode tube I or the top end of the electrode tube II by more than 1 meter.
The direct current power supply is an adjustable direct current stabilized power supply of 0-100V/0-5A.
The distance between the first electrode tube and the second electrode tube is 0.8-1.2 m.
An application method of a sludge modification-restoration integrated system based on electrochemical treatment in high-water-content sludge reinforcement improvement comprises the following steps:
(1) arranging a blocking pipe: inserting a blocking pipe into the field, wherein the insertion depth is 1-3m, and the blocking pipe is arranged in a hexagon; arranging the barrier tube with the electrode tube II at the center point of a hexagon, and arranging the barrier tube with the electrode tube I on the vertex of the hexagon;
(2) arranging a lead and a liquid through pipe: connecting the electrode tube with a lead and connecting the electrode tube with the liquid through tube I; the electrode tube is connected with the two-purpose lead wire and is connected with a liquid tube II; the distance between each two adjacent electrode tubes I and the electrode tubes II is 0.8-1.2m, wherein the liquid inlet tube II and the liquid inlet tube I are inserted into the bottom of the blocking tube, and the liquid outlet tube II and the liquid outlet tube I are lower than the surface of sludge;
(3) electrolyte conveying: when the first electrolyte tank is used as the anode electrolyte, the second electrolyte tank is used as the cathode electrolyte, an electrolyte switch is turned on, the first electrolyte enters the first electrode tube and is pumped by the first liquid inlet tube to form a cycle with the first liquid outlet tube, and the second electrolyte enters the second electrode tube and is pumped by the second liquid inlet tube to form a cycle with the second liquid outlet tube; the electrolyte tank is 0.5-2m higher than the top position of the electrode;
(4) reinforcement is performed by reversing electrode switching and intermittently energizing: when the anode is started, the first electrode tube is connected with the anode of a voltage-stabilizing direct-current power supply and is used as an anode; the second electrode tube is connected with the negative electrode of the voltage-stabilizing direct-current power supply and is used as a cathode; meanwhile, the voltage of the direct-current power supply is adjusted to a specific value of 36-100V, the voltage is adjusted according to the distance between adjacent electrode tubes, an electrode switch is turned on, the electrode switch is continuously electrified for 12h, and the electrode switch is turned off to stop electrifying for 12 h; in the electrifying process, electrolyte is supplemented into the first electrolyte pool and the second electrolyte pool at proper time (the input of the electrolyte depends on gravity or a pumping mode and is determined according to the actual situation of a field; the output quantity of water and the electrolyte in the filter tube after electroosmosis treatment is set to be 1-5 ml/s; through circulation, the pH value in the solution is favorably maintained, and secondary pollution is avoided); then, the electrode is reversed, and the positive electrode and the negative electrode are changed through the adjustment of an electrode switch; at the moment, the first electrode tube is connected with the negative electrode of the voltage-stabilizing direct-current power supply and is used as a cathode, and the second electrode tube is connected with the positive electrode of the voltage-stabilizing direct-current power supply and is used as an anode; electrifying for 12h, closing the switch, stopping electrifying for 12h, circulating for 1 time every two days, and treating for 15-45 days.
(5) Stopping electrifying and leading liquid, recycling redundant electrolyte and recycling a liquid leading pipe.
An application method of an electrochemical treatment based sludge modification-remediation integrated system in polluted sludge remediation comprises the following steps:
(1) arranging a blocking pipe: inserting a blocking pipe into the field, wherein the insertion depth is 1-2m, and the blocking pipe is arranged in a hexagon; arranging the barrier tube with the electrode tube II at the center point of a hexagon, and arranging the barrier tube with the electrode tube I on the vertex of the hexagon;
(2) arranging a lead and a liquid through pipe: connecting the electrode tube with a lead and connecting the electrode tube with the liquid through tube I; the electrode tube is connected with the two-purpose lead wire and is connected with a liquid tube II; the distance between each two adjacent electrode tubes I and the electrode tubes II is 0.8-1.2m, wherein the liquid inlet tube II and the liquid inlet tube I are inserted into the bottom of the blocking tube, and the liquid outlet tube II and the liquid outlet tube I are lower than the surface of sludge;
(3) the method comprises the following steps of (1) repairing copper and zinc polluted sludge by using kaolin, and repairing chromium polluted sludge by using calcium bentonite: the first electrode tube is connected with the anode of a voltage-stabilizing direct-current power supply and is an anode; the second electrode tube is connected with the negative electrode of the voltage-stabilizing direct-current power supply and is a cathode. Meanwhile, the first electrolyte tank is an anolyte, and the second electrolyte tank is a catholyte. Kaolin or calcium bentonite with the depth of about 0.5m and the radius of 0.3m is filled around each electrode tube II;
(4) electrifying an electrolyte: opening an electrolyte switch, enabling the first electrolyte to enter the first electrode tube to form a cycle through pumping of the first liquid inlet tube and the first liquid outlet tube, and enabling the second electrolyte to enter the second electrode tube to form a cycle through pumping of the second liquid inlet tube and the second liquid outlet tube; in the electrifying process, electrolyte is supplemented into the first electrolyte pool and the second electrolyte pool at proper time (the input of the electrolyte depends on gravity or a pumping mode and is determined according to the actual situation of a field; the output quantity of water and the electrolyte in a filter tube after electroosmosis treatment is set to be 1-5 ml/s; through circulation, the pH value in the solution is favorably maintained, secondary pollution is avoided), and the position of the electrolyte pool is 0.5-2m higher than the top end of an electrode;
(5) electrifying: adjusting the voltage of a direct current power supply to a specific value of 36-100V, adjusting the voltage according to the distance between adjacent electrode tubes, opening an electrode switch, and moving cations such as heavy metal ions and hydrogen ions to a cathode and anions such as hydroxyl ions to an anode; electrifying for 12h every day, and treating for 5-15 days.
(6) Removing sludge, kaolin or bentonite around the cathode tube, and recovering the redundant electrolyte and the liquid through tube.
When the high water content sludge is reinforced and improved: the electrode tube is made of an integrated material, namely the first electrode and the second electrode are attached to the inside of the blocking tube and are integrated, the blocking tube is a plastic filter tube wrapped by 500-mesh geotechnical filter cloth, the bottom end with the diameter of 3-6cm is a closed end, sludge can be blocked from passing through the blocking tube, and water molecules are not hindered from passing through the blocking tube. The electrode material adopts a graphite electrode, and the surface of the electrode is coated with electrode protection paint.
In the polluted sludge remediation: the electrode tube is made of an integrated material, the graphite electrode is attached to the integrated conductive material combined in the plastic filter tube, and the electrode tube is made of the same material as the electrode tube, so that the electrochemical treatment of polluted sludge, particularly Cr is carried out6+、Hg2 +、Mn2+、Pb2+The treatment effect of (2) is stronger. Because of kaolin to Cu2+、Zn2+And Pb2+Has strong adsorption effect, and the calcium bentonite has strong adsorption effect on Cr6+The electrode tube has strong adsorbability, so the periphery of the electrode tube can be filled with materials such as kaolin, bentonite and the like.
The electrolyte in the second electrolyte tank can be a solution of sodium silicate, sodium carbonate and the like with a certain concentration when being used for reinforcing and improving the electrolyte; cu can be stabilized by sodium carbonate, sodium silicate, etc2+The iron sulfate can repair the cadmium and lead pollution in the acid soil, so that solutions of iron sulfate, sodium carbonate, sodium silicate, sodium sulfate and the like can be adopted during repair.
When the electrolyte in the first electrolyte tank is reinforced and improved, the electrolyte can be solutions of ferric chloride, calcium chloride and the like with certain concentration; the electrolyte is the same as that in the second electrolyte tank when the device is repaired.
The utility model has the advantages as follows:
1. the utility model discloses a method of electrochemistry reinforcement combination tube well drainage discharges the gravity water in the silt, breaks away from the constraint with most capillary bonding water and weak bonding water, a small amount of strong bonding water and becomes the free water and gets rid of, improves dehydration efficiency.
2. Through the control of the electrode and the electrolyte, the filling and removing method can gradually change and remove the materials and the sludge backfilled near the anode tube of the polluted sludge on the premise of solidifying and improving the soil particle components with high clay content, thereby reducing the content of the sludge pollutants, effectively repairing the polluted sludge and playing the comprehensive effects of improvement, reinforcement and repair.
3. Through the mode of electrode reversal, intermittent type circular telegram, solved near the long-term drainage's of positive pole problem, compare ordinary electroosmosis reinforcement and guaranteed the soil body homogeneity for later stage electroosmosis current distribution is also more even, has stabilized the electric potential in the electroosmosis place simultaneously, and reduces the uneven settlement in processing later stage, reduces electrode corrosion, thereby has reduced the treatment cost.
4. The blocking pipe is filled with circulating electrolyte, the electrolyte is filled between the electrode and the soil body, a new conductor is formed in the whole soil body, the interfacial resistance cannot be increased due to soil body-electrode separation, the effective electric field area is ensured by combining the hexagonal electrode arrangement, the electroosmosis efficiency is greatly improved, and the dehydration rate is accelerated.
Drawings
FIG. 1: the utility model relates to a pipeline layout schematic diagram of a sludge modification-restoration integrated system based on electrochemical treatment;
FIG. 2 is a schematic structural diagram of an electrochemical treatment based sludge modification and remediation integrated system;
wherein: 1. a first electrode tube; 2. a second electrode tube; 3. a wire; 4. a barrier tube; 5. a direct current power supply; 6. a second liquid pipe; 7. a first liquid through pipe; 8. a second electrolyte tank; 9. a first electrolyte tank; 10. an electrode switch; 11. an electrolyte switch; 12. a liquid inlet pipe II; 13. a second liquid outlet pipe; 14. a liquid inlet pipe I; 15. a first liquid outlet pipe; 16. a first electrode; 17. and a second electrode.
Detailed Description
Example 1
A sludge modification-restoration integrated system based on electrochemical treatment comprises a second electrode tube 2, a lead 3, a direct current power supply 5 and a first electrode tube 1, wherein the first electrode tube 1 and the second electrode tube 2 are respectively connected with the direct current power supply 5 through the lead 3, the first electrode tube 1 is connected with the second electrode tube 2 through the lead 3, the first electrode tube 1 and the second electrode tube 2 are arranged in a hexagon shape, the second electrode tube 2 is arranged at the center point of the hexagon, the first electrode tube 1 is arranged at the vertex of the hexagon, the first electrode tube 1 comprises a first electrode 16, a blocking tube 4 and a first liquid passing tube 7, the first electrode tube 1 is connected with a first electrolytic tank 9 through the first liquid passing tube 7, the first liquid passing tube 7 comprises a first liquid inlet tube 14 and a first liquid outlet tube 15, the second electrode tube 2 comprises a second electrode 17, the blocking tube 4 and the second liquid passing tube 6, the second electrode tube 2 is connected with a second electrolytic tank 8 through the second liquid passing tube 6, the liquid through pipe II 6 comprises a liquid inlet pipe II 12 and a liquid outlet pipe II 13.
The lead 3 is provided with an electrode switch 10.
The first liquid inlet pipe 12 and the second liquid inlet pipe 13 are provided with electrolyte switches 11.
The blocking pipe 4 is a 500-mesh geotextile filter cloth porous plastic pipe with the diameter of 5cm, and the bottom end of the blocking pipe is a closed end which can block sludge from passing through but does not prevent water molecules from passing through.
The first liquid inlet pipe 14, the first liquid outlet pipe 15, the second liquid inlet pipe 12 and the second liquid outlet pipe 13 are all plastic pipes with the inner diameter of 1 cm.
The first electrode 16, the second electrode 17 and the barrier tube 4 are made of an integrated material, that is, the barrier tube 4 is internally made of a conductive graphite material, so as to form an integrated electrode tube (that is, the first electrode 16 and the barrier tube 4, and the second motor 17 and the barrier tube 4 are designed in an integrated manner).
The electrolyte in the second electrolyte tank 8 is 0.5mol/L sodium carbonate solution; the electrolyte in the first electrolyte tank 9 is 0.5mol/L ferric chloride solution.
Electrochemical reaction formula:
① when the power is turned on, the anolyte is ferric chloride, the catholyte is sodium carbonate,
the anode reaction formula: discharge sequence Cl-＞OH-，2Cl--2e-=Cl2↑
The cathode reaction formula: discharge sequence H+＞Na+，4H++4e-=2H2↑
The general reaction formula is as follows: 2FeCl3+6H2O==2Fe(OH)3+3Cl2↑+3H2↑
② exchange electrode, anode electrolyte of sodium carbonate, cathode electrolyte of ferric chloride,
the anode reaction formula: discharge sequence Cl-＞OH-＞CO3 2-，2Cl--2e-=Cl2↑
The cathode reaction formula: discharge sequence Fe3+＞H+＞Na+，Fe3++e-=Fe2+
The general reaction formula is as follows: 2FeCl3==2FeCl2+Cl2↑
The application method (applied to the reinforcement and improvement of the sludge with high water content):
(1) preparing a site: leveling a field, excavating a drainage ditch, and testing the initial water content to be 98%;
(2) arranging the blocking pipe 4: inserting the blocking pipes 4 into the field, wherein the insertion depth is 2m, and the blocking pipes 4 are arranged in a hexagon; arranging the barrier tube 4 with the electrode tube II 2 at the center point of the hexagon, and arranging the barrier tube 4 with the electrode tube I1 at the vertex of the hexagon;
(3) arranging the lead 3 and the liquid passing tube: connecting the electrode tube I1 by using a lead wire 3, and connecting the electrode tube I into a liquid through tube I7; the second electrode tube 2 is connected with the second liquid through tube 6 by a lead 3; the distance between each two adjacent electrode tubes I1 and between each two adjacent electrode tubes I1 and electrode tubes II 2 is 1m, wherein the liquid inlet tubes II 12 and the liquid inlet tubes I14 are inserted into the bottoms of the blocking tubes 4, the liquid outlet tubes II 13 and the liquid outlet tubes I15 are lower than the surface of sludge and are inserted into the tubes by 0.4 m;
(4) electrolyte conveying: when the first electrolyte tank 9 is used as the anolyte, the second electrolyte tank 8 is used as the catholyte, the electrolyte switch 11 is turned on, the first electrolyte 9 enters the electrode tube I1 and is pumped by the liquid inlet tube I14 and the liquid outlet tube I15 to form a cycle, and the second electrolyte 8 enters the electrode tube II 2 and is pumped by the liquid inlet tube II 12 and the liquid outlet tube II 13 to form a cycle; the electrolyte tank is 1m higher than the top position of the electrode;
(5) reinforcement is performed by reversing electrode switching and intermittently energizing: at the beginning, the electrode tube I1 is connected with the anode of the voltage-stabilizing direct-current power supply 5 and is used as an anode; the second electrode tube 2 is connected with the negative electrode of the voltage-stabilizing direct-current power supply 5 and is a cathode; meanwhile, the voltage of the direct current power supply 5 is adjusted to a specific value, the voltage is 80V, the electrode switch 10 is opened, the power is continuously supplied for 12h, and the switch is closed to stop the power supply for 12 h; in the electrifying process, electrolyte is supplemented in the first electrolyte tank 9 and the second electrolyte tank 8 at proper time (the input of the electrolyte depends on gravity or a pumping mode, and is determined according to the actual situation of a field, the output quantity of the water and the electrolyte in the filter tube after electroosmosis treatment is set to be 1-5 ml/s, and the circulation is carried out, so that the pH value in the solution is favorably maintained, and secondary pollution is not generated); then, the electrodes are reversed, and the positive and negative electrodes are changed through the adjustment of the electrode switch 10; at the moment, the electrode tube I1 is connected with the negative electrode of the voltage-stabilizing direct-current power supply 5 to be a cathode, and the electrode tube II 2 is connected with the positive electrode of the voltage-stabilizing direct-current power supply 5 to be an anode; electrifying for 12h, closing the switch to stop electrifying for 12h, circulating for 1 time every two days, and treating for 30 days in the embodiment according to the actual situation on site, wherein the time is not too long;
(6) effect monitoring: monitoring the soil water content every 3 days, reducing the water content of the sludge to below 45% after the treatment is finished, increasing the coarse particle content by more than 10%, stopping electrifying and feeding liquid, recycling redundant electrolyte, and recycling a liquid feeding pipe.
Example 2
A sludge modification-restoration integrated system based on electrochemical treatment comprises a second electrode tube 2, a lead 3, a direct current power supply 5 and a first electrode tube 1, wherein the first electrode tube 1 and the second electrode tube 2 are respectively connected with the direct current power supply 5 through the lead 3, the first electrode tube 1 is connected with the second electrode tube 2 through the lead 3, the first electrode tube 1 and the second electrode tube 2 are arranged in a hexagon shape, the second electrode tube 2 is arranged at the center point of the hexagon, the first electrode tube 1 is arranged at the vertex of the hexagon, the first electrode tube 1 comprises a first electrode 16, a blocking tube 4 and a first liquid passing tube 7, the first electrode tube 1 is connected with a first electrolytic tank 9 through the first liquid passing tube 7, the first liquid passing tube 7 comprises a first liquid inlet tube 14 and a first liquid outlet tube 15, the second electrode tube 2 comprises a second electrode 17, the blocking tube 4 and the second liquid passing tube 6, the second electrode tube 2 is connected with a second electrolytic tank 8 through the second liquid passing tube 6, the liquid through pipe II 6 comprises a liquid inlet pipe II 12 and a liquid outlet pipe II 13.
The lead 3 is provided with an electrode switch 10.
The first liquid inlet pipe 12 and the second liquid inlet pipe 13 are provided with electrolyte switches 11.
The blocking pipe 4 is a 500-mesh geotextile filter cloth porous plastic pipe with the diameter of 5cm, and the bottom end of the blocking pipe is a closed end which can block sludge from passing through but does not prevent water molecules from passing through.
The first liquid inlet pipe 14, the first liquid outlet pipe 15, the second liquid inlet pipe 12 and the second liquid outlet pipe 13 are all plastic pipes with the inner diameter of 1 cm.
The second electrolyte tank 8 and the first electrolyte tank 9 both adopt 1mol/L sodium silicate solution.
Electrochemical reaction formula:
on power-up, anolyte: sodium silicate, catholyte: a sodium silicate, a sodium silicate and a sodium silicate,
the anode reaction formula: discharge sequence OH-＞SiO3 2-，4OH--4e-=2H2O+O2↑
The cathode reaction formula: discharge sequence H+＞Na+，4H++4e-=2H2↑
The general reaction formula is as follows: 2H2O==2H2↑+O2↑
Application method (contaminated sludge remediation):
(1) preparing a site: leveling a field, excavating a drainage ditch, and testing the initial water content to be 98%;
(2) arranging the blocking pipe 4: inserting the blocking pipes 4 into the field, wherein the insertion depth is 2m, and the blocking pipes 4 are arranged in a hexagon; arranging the barrier tube 4 with the electrode tube II 2 at the center point of the hexagon, and arranging the barrier tube 4 with the electrode tube I1 at the vertex of the hexagon;
(3) arranging the lead 3 and the liquid passing tube: connecting the electrode tube I1 by using a lead wire 3, and connecting the electrode tube I into a liquid through tube I7; the second electrode tube 2 is connected with the second liquid through tube 6 by a lead 3; the distance between each two adjacent electrode tubes I1 and between each two adjacent electrode tubes I1 and electrode tubes II 2 is 1m, wherein the liquid inlet tubes II 12 and the liquid inlet tubes I14 are inserted into the bottoms of the blocking tubes 4, the liquid outlet tubes II 13 and the liquid outlet tubes I15 are lower than the surface of sludge and are inserted into the tubes by 0.4 m;
(4) repairing copper and chromium polluted sludge by using kaolin: the electrode tube I1 is connected with the anode of a voltage-stabilizing direct-current power supply 5 and is an anode; the second electrode tube 2 is connected with the negative electrode of the voltage-stabilizing direct-current power supply 5 and is a cathode. Meanwhile, the first electrolyte tank 9 is an anolyte, and the second electrolyte tank 8 is a catholyte. Kaolin with the depth of about 0.5m and the radius of 0.3m is filled around each electrode tube II;
(5) electrifying an electrolyte: opening an electrolyte switch 11, enabling a first electrolyte 9 to enter a first electrode tube 1 to form a cycle through pumping of a first liquid inlet tube 14 and a first liquid outlet tube 15, and enabling a second electrolyte 8 to enter a second electrode tube 2 to form a cycle through pumping of a second liquid inlet tube 12 and a second liquid outlet tube 13; in the electrifying process, electrolyte is supplemented into the first electrolyte tank 9 and the second electrolyte tank 8 at proper time (the input of the electrolyte depends on gravity or a pumping mode, and is determined according to the actual situation of a field, the output quantity of water and the electrolyte in the filter tube after electroosmosis treatment is set to be 1-5 ml/s, and through circulation, the pH value in the solution is favorably maintained, secondary pollution is avoided, and the position of the electrolyte tank is 1m higher than the top end of the electrode;
(6) electrifying: adjusting the voltage of the direct current power supply 5 to a specific value, namely 60V, opening an electrode switch 10, moving cations such as heavy metal ions and hydrogen ions to a cathode, and moving anions such as hydroxyl ions to an anode; electrifying for 12h every day, stopping for 12h, and short-circuiting the positive electrode and the negative electrode when the electricity is cut off to discharge the charges, and treating for 7 days. The current is stabilized at a value smaller than the initial value, and at this time, the energization is stopped because most of the heavy metal ions are precipitated.
(7) And (3) effect testing: the pH and the pollutant content are tested and treated until the expected effect is achieved. And after the treatment is finished, stopping electrifying and leading in the liquid, recovering the redundant electrolyte, recovering the liquid leading-in pipe I and the liquid leading-in pipe II, and removing the kaolin. And when the process is finished, the pH average value in the whole sludge field is 7.3, the water content can be reduced to below 60%, the heavy metal reduction rate reaches above 60%, wherein the average reduction rate of copper is about 71%, and the average reduction rate of Cr is about 62%.
The above-mentioned embodiment is only used for explaining the utility model concept, and not to the limit of the utility model protection, and all utilize this concept to be right the utility model discloses carry out insubstantial change, all shall fall into the scope of protection of the utility model.
Claims (8)
1. A sludge modification-restoration integrated system based on electrochemical treatment is characterized in that: including electrode tube two, wire, DC power supply and electrode tube one, electrode tube one and electrode tube two are connected with DC power supply through the wire respectively, electrode tube one links to each other through the wire, electrode tube two passes through the wire and links to each other, electrode tube one and electrode tube two adopt the hexagon to arrange, electrode tube two arranges in hexagonal central point, electrode tube one arranges on hexagonal summit, electrode tube one includes electrode one, blocks pipe and leads to liquid pipe one, electrode tube one links to each other with first electrolytic bath through leading to liquid pipe one, it includes feed liquor pipe one and drain pipe one to lead to liquid pipe one, electrode tube two includes electrode two, blocks pipe and leads to liquid pipe two, electrode tube two links to each other with second electrolytic bath through leading to liquid pipe two, it includes feed liquor pipe two and drain pipe two to lead to liquid pipe two.
2. The integrated sludge modification-remediation system based on electrochemical treatment of claim 1, wherein: the blocking pipe is a plastic filter pipe wrapped by 500-mesh geotechnical filter cloth, the bottom end with the diameter of 3-6cm is a closed end, sludge can be blocked from passing through, and water molecules cannot be blocked from passing through.
3. The integrated sludge modification-remediation system based on electrochemical treatment of claim 1, wherein: and the lead is provided with an electrode switch.
4. The integrated sludge modification-remediation system based on electrochemical treatment of claim 1, wherein: and the first liquid inlet pipe and the second liquid inlet pipe are provided with electrolyte switches.
5. The integrated sludge modification-remediation system based on electrochemical treatment of claim 1, wherein: the blocking pipe and the first electrode pipe are integrally designed, and the blocking pipe and the second electrode pipe are integrally designed.
6. The integrated sludge modification-remediation system based on electrochemical treatment of claim 1, wherein: the first electrolytic cell and the second electrolytic cell are higher than the top end of the electrode tube I or the top end of the electrode tube II by more than 1 meter.
7. The integrated sludge modification-remediation system based on electrochemical treatment of claim 1, wherein: the direct current power supply is an adjustable direct current stabilized power supply of 0-100V/0-5A.
8. The integrated sludge modification-remediation system based on electrochemical treatment of claim 1, wherein: the distance between the first electrode tube and the second electrode tube is 0.8-1.2 m.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109987818A (en) * | 2019-04-11 | 2019-07-09 | 浙江广川工程咨询有限公司 | A kind of mud modification-reparation integrated system and application based on electrochemical treatments |
| CN112505291A (en) * | 2020-11-13 | 2021-03-16 | 河海大学 | Test device and method for heavy metal precipitation and solidification of river and lake bottom mud and foundation reinforcement |
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2019
- 2019-04-11 CN CN201920484451.5U patent/CN210117331U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109987818A (en) * | 2019-04-11 | 2019-07-09 | 浙江广川工程咨询有限公司 | A kind of mud modification-reparation integrated system and application based on electrochemical treatments |
| CN112505291A (en) * | 2020-11-13 | 2021-03-16 | 河海大学 | Test device and method for heavy metal precipitation and solidification of river and lake bottom mud and foundation reinforcement |
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