CN111760902B - Electronic soil heavy metal remove device - Google Patents

Abstract

The invention discloses an electric soil heavy metal removing device which comprises an anode rod, a water inlet pipe, an anode placing pipe and a water outlet pipe, wherein the water inlet pipe, the anode placing pipe and the water outlet pipe are sequentially communicated, the anode placing pipe is horizontally arranged and comprises a placing section, the cross section of the placing section is triangular, the anode rod is arranged in the placing section along the axial direction of the placing section, the anode rod is supported on the bottom wall of the placing section, liquid flowing into the water inlet pipe flows at the bottom of the placing section, gas generated at the anode rod is collected at the pointed top of the placing section, an anti-shielding water-permeable hole is arranged at the bottom of the side wall of the placing section, and the anti-shielding water-permeable hole avoids electrostatic shielding in the placing section and liquid in the placing section from contacting with soil.

Description

Electronic soil heavy metal remove device

[ technical field ] A

The invention relates to an electric soil heavy metal removing device, and belongs to the field of soil heavy metal pollution treatment.

[ background of the invention ]

The electric restoration treatment technology has the characteristics of small damage to the soil structure, in-situ treatment, short treatment period, relatively low treatment price and the like, and is suitable for the heavy metal pollution treatment of the farmland soil. The electric device has the working principle that heavy metal ions in the soil continuously move to the cathode by establishing a direct current electric field and are adsorbed by the heavy metal trapping material near the cathode, so that the heavy metal ions in the soil are removed. Because the gas that the electric prosthetic devices ubiquitous anode electrode produced is difficult to discharge at present, the strong acid electrode liquid of positive pole is difficult to in time adjust to neutrality to and practical problems such as rainwater interference treatment process, very big enough obstructed the normal work of direct current electric field in the on-the-spot electric prosthetic processes, lead to heavy metal ion's the efficiency of getting rid of to be difficult to satisfy actual need.

[ summary of the invention ]

The invention aims to overcome the defects of the prior art and provide the electric soil heavy metal removing device with higher heavy metal ion removing efficiency.

The technical scheme adopted by the invention is as follows:

the utility model provides an electronic soil heavy metal remove device, including the anode bar, the inlet tube, pipe and outlet pipe are placed to the positive pole, the inlet tube, the pipe is placed to the positive pole and the outlet pipe communicates in proper order, the setting of pipe level is placed to the positive pole, the positive pole is placed the pipe and is included placing the section, the cross sectional shape who places the section is triangle-shaped, the anode bar is along placing the axial setting of section in placing the section, the anode bar supports on placing the diapire of section, the bottom of placing the section supplies the liquid flow of inlet tube inflow, the point form top of placing the section collects the gas that anode bar department produced, the lateral wall bottom of placing the section is provided with the anti-shield hole of permeating water, the anti-shield hole of permeating water avoids placing section internal static shielding and supplies to place section liquid and soil contact.

The invention has the beneficial effects that:

the pipe is placed to the flow direction positive pole after inlet tube department is intake, and rivers are placing the section in with the contact of positive pole stick, and then gradually change into the anolyte, via the hole of permeating water of anti-shield, the rivers of positive pole stick department can with place the outer soil contact of section. After the positive pole bar circular telegram, borrow by rivers and soil between positive pole bar and the negative pole, the positive pole bar can form the DC electric field of line face type with between the negative pole on soil surface, owing to place the section level and place, and place the section cross section and be triangle-shaped, the DC electric field of line face type forms the dodging to the electric field promptly via the lateral wall that the section was placed to the soil surface in-process in the shield hole of permeating water, and the degree of dodging is far greater than DC electric field's bending degree, thereby effectively prevent to place the shielding interference of section lateral wall to the electric field, in order to guarantee this DC electric field fully act on the heavy metal cation in the soil, increase the metal cation in the soil in the unit interval and to negative pole department migration quantity, promote metal cation migration efficiency. A small amount of gas generated at the anode bar is collected to the top space of the placing section under the action of buoyancy, so that the phenomenon that the non-conductive gas blocks the anti-shielding water-permeable hole is avoided, and a direct current electric field is cut off. The top sharp-shaped furling structure of the placing section has good gathering and gathering effects on gas, so that the gas is favorably discharged from the water outlet pipe along with anolyte. The bottom of the placing section is provided with sufficient space for the anode liquid to flow, so that the discharge speed of the anode liquid is improved. The diapire of placing the section directly supports the anode rod, has reduced the setting of placing the section inner part to reduce the influence of corrosivity anolyte, still increase simultaneously and place the inside space that supplies the gas-liquid to flow of section.

The invention also comprises a power supply and a cathode, wherein the cathode is laid on the soil surface in the form of an iron net, and the anode bar, the power supply and the cathode are sequentially connected in series to form a loop.

The water inlet pipe comprises a vertically arranged water inlet main pipe and a plurality of horizontally arranged water inlet branch pipes, wherein the number of anode placing pipes and the number of water outlet pipes are the same as that of the water inlet branch pipes, the anode placing pipes are horizontally arranged, the water outlet pipes are vertically arranged, the anode placing pipes also comprise a first connecting section and a second connecting section which are arranged at the two ends of the placing sections, one end of each water inlet branch pipe is communicated with the lower end of the water inlet main pipe, the other end of each water inlet branch pipe is communicated with the first connecting section, and the second connecting section is communicated with the lower end of each water outlet pipe.

The upper end of the water inlet main pipe is 5cm higher than the upper end of the water outlet pipe.

The parts of the first connecting section and the second connecting section, which are close to the placing section, are transition pipes matched with the cross section of the placing section in shape, the parts of the first connecting section and the second connecting section, which are far away from the placing section, are round pipes, and the end parts of the water inlet branch pipe and the water outlet pipe are round pipes.

The anode placing tube also comprises a triangular prism body positioned below the placing section, and the side wall of one side of the triangular prism body is fixed with the bottom surface of the placing section.

All the lead wires connected with the power supply through the anode rods are wound and collected at the water inlet main pipe through the water inlet branch pipes.

The upper end of the water inlet main pipe is positioned above soil, the upper end of the water inlet main pipe is provided with a water collecting funnel for increasing the area of a water inlet, and the upper end of the water outlet pipe is provided with a ring cover for reducing the area of a water outlet.

The bottom of the water outlet pipe protrudes downwards to form a conical sand collecting funnel, the side wall of the water outlet pipe is provided with at least two mounting holes, the edges of the mounting holes extend towards the inside of the water outlet pipe to form an annular wall, the annular wall is provided with internal threads, the outer wall of the circular pipe part of the second connecting section is provided with external threads, and the second connecting section is in threaded connection with the annular wall.

The surface of the anode rod is coated with a polytetrafluoroethylene film, and the outer surface of the polytetrafluoroethylene film is wound with a polytetrafluoroethylene net.

Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.

[ description of the drawings ]

The invention is further described below with reference to the accompanying drawings:

fig. 1 is a schematic front view of an electric soil heavy metal removal device according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure taken along the line A-A in FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure in the direction B of FIG. 1;

FIG. 4 is a schematic cross-sectional view of a placement section in accordance with embodiment 2 of the present invention;

FIG. 5 is a schematic sectional view of the device for removing heavy metals from soil according to embodiment 3 of the present invention;

fig. 6 is a schematic sectional view of a water outlet pipe according to embodiment 4 of the present invention.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the following description, the appearances of the indicating orientation or positional relationship such as the terms "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenience in describing the embodiments and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Example 1:

referring to fig. 1-3, the present embodiment provides an electric soil heavy metal removing apparatus, which includes a power supply (not shown), a cathode (not shown), an anode rod 4, a water inlet pipe 1, an anode placing pipe, and a water outlet pipe 3.

The power is located the soil top, and anode rod 4 is located soil, and the negative pole setting is on soil surface, and power, anode rod 4 and negative pole are connected the formation return circuit in proper order. After the power supply is electrified, a direct current electric field is formed between the anode rod 4 and the cathode, namely between the anode rod 4 and the soil surface, and heavy metal ions in the soil continuously migrate to the cathode.

The water inlet pipe 1, the anode placing pipe and the water outlet pipe 3 are sequentially communicated, water enters the water inlet pipe 1 from the water inlet 11 of the water inlet pipe 1, then flows through the anode placing pipe, and finally is discharged from the water outlet 31 of the water outlet pipe 3.

The pipe level setting is placed to the positive pole, and the positive pole is placed the pipe and is being placed section 22 including placing section 22, and section 22 is being placed in along the axial setting of placing section 22 to positive pole stick 4, and positive pole stick 4 supports on the diapire of placing section 22, and rivers and the contact of positive pole stick 4 form the anolyte. The cross-sectional shape of the placement segment 22 is triangular, wherein the top edge of the placement segment 22, projected in the vertical direction, completely falls on the bottom surface of the placement segment 22, which may be an isosceles triangle with an apex angle of 60 °, 90 ° or 120 ° in view of symmetry. The entire parking section 22 is thus of a configuration with a large lower part and a small upper part.

The side wall of the placing section 22 is provided with water-permeable holes 24 for shielding, and preferably, the water-permeable holes 24 for shielding are located at the bottom of the side wall of the placing section 22 so as to be as close to the anode rod 4 as possible. After the anode rod 4 is electrified, the electric field generated by the anode rod 4 can reach the outside soil of the placing section 22 through the anti-shielding permeable holes 24 by relying on the anolyte until the cathode at the surface of the soil, so that heavy metal ions in the soil continuously move to the cathode, the migration amount of the heavy metal ions to the anode rod 4 in unit time is promoted, and the migration efficiency is further promoted.

Anode rod 4 is located places section 22 bottom, and the hole 24 that permeates water of anti-shielding is located the lateral wall bottom of placing section 22, and the gaseous gathering of the last production of anode rod 4 is at the top of placing section 22 under the buoyancy effect, dodges the hole 24 that permeates water of anti-shielding to prevent that gas from plugging up anti-shielding hole 24 that permeates water. In addition, the axis of the water-permeable shielding holes 24 and the axis of the anode rod 4 form a plane perpendicular to the side wall of the placing section 22, so that the distance between the anode rod 4 at the bottom of the placing section 22 and the soil outside the water-permeable shielding holes 24 is minimized, and the electric field intensity generated by the anode rod 4 is increased. In combination, the water-permeable barrier holes 24 are generally located laterally above the anode rods 4.

The larger the vertex angle of the placing section 22 is, the larger the included angle between the tangent of the direct current electric field at the position of the anti-shielding water-permeable hole 24 and the side wall of the placing section 22 is. The different position crookedness of direct current electric field is different, but no matter how the condition, the lateral wall of placing section 22 outside placing section 22 is all the time towards the direction extension that deviates from the direct current electric field, and the electric field leaves behind the shield prevention permeable hole 24 and is difficult to be close to the lateral wall of placing section 22 to make the electric field can arrive the cathode smoothly, fully guaranteed metal ion to the migration efficiency of cathode department.

The liquid flowing into the water inlet pipe 1 is used for replacing the acidic anolyte at the anode rod 4, wherein the anolyte flows at the bottom of the placing section 22 under the action of potential energy difference so as to provide sufficient flowing space for the anolyte, promote the anolyte to flow to the water outlet pipe 3 and finally be discharged from the water outlet 31 of the water outlet pipe 3.

The gas that the anode rod 4 department produced gathers to the top apex angle of placing section 22 under the buoyancy, and the tip form furling structure in top of placing section 22 has good gathering and gathering effect to gas to help non-conducting gas to discharge to outlet pipe 3 under the rivers drive. Since the shield-proof permeable holes 24 are blocked by soil, gas can rarely leave the placing section 22 from the shield-proof permeable holes 24.

The diapire of placing section 22 directly supports anode rod 4, avoids additionally setting up the spare part that supports anode rod 4 in placing section 22 to reduce the influence of corrosive anolyte, still increase simultaneously and place inside gas feed liquid reservoir of section 22, mobile space.

For promoting electronic soil heavy metal remove device's work efficiency, this embodiment inlet tube 1 includes the water inlet manifold of vertical setting and the intraductal pipe of intaking that many levels set up, and the positive pole is placed the quantity of managing and outlet pipe 3 and is all the same with the quantity of the intraductal branch of intaking, and every positive pole is placed intraductally and has all been placed an anode rod 4. The water inlet 11 is positioned at the upper end of the water inlet main pipe, the water inlet 11 is positioned above the surface of the soil, and the lower part of the water inlet main pipe and the water inlet branch pipe are buried in the soil. In consideration of cost performance, the number of the water inlet branch pipes is four, and the four water inlet branch pipes are arranged in a cross shape in the same horizontal plane. Because the whole electric soil heavy metal removing device is highly symmetrical by taking the axis of the water inlet main pipe as a central shaft, the embodiment only describes the branch where one water inlet branch pipe is located as a representative.

The anode placing tube further includes a first connection section 21 and a second connection section 23 fixed to both ends of the placing section 22, respectively. The one end of the branch pipe of intaking communicates with the lower extreme of intake manifold, and the other end of the branch pipe of intaking communicates with first linkage segment 21, and 3 vertical settings of outlet pipe, and outlet pipe 3 are L type pipes, and second linkage segment 23 communicates with the lower extreme of outlet pipe 3, and delivery port 31 is located the upper end of outlet pipe 3, and delivery port 31 is in soil surface's top equally. Water enters the water inlet main pipe from the water inlet 11 and then is divided into the water inlet branch pipes, and liquid in the water inlet branch pipes is finally discharged from the corresponding water outlets 31 through the corresponding first connecting sections 21, the placing sections 22, the second connecting sections 23 and the water outlet pipes 3.

Because the cross section of the water inlet branch pipe and the cross section of the lower end of the water outlet pipe 3 are both circular, that is, the lower parts of the water inlet branch pipe and the water outlet pipe 3 are both circular pipes, and the cross section of the placing section 22 is triangular, the parts of the first connecting section 21 and the second connecting section 23 close to the placing section 22 are transition pipes matched with the cross section of the placing section 22 in shape, and the parts of the first connecting section 21 and the second connecting section 23 far away from the placing section 22 are circular pipes. The cross section of the transition pipe gradually changes from a triangle shape to a circle shape to smoothly connect with the round pipe part, thereby playing a role of connection on the basis of ensuring the end tightness of the first connecting section 21 and the second connecting section 23.

Preferably, the leads 5 for connecting all the anode rods 4 with the power supply are wound and gathered inside or outside the water inlet main pipe through the respective water inlet branch pipes, so that all the anode rods 4 are electrically connected to the same power supply, and the number of power supplies and the use amount of the leads are reduced.

The upper end of inlet manifold is higher than the upper end of outlet pipe 3 by 5cm to prevent that the interior liquid of inlet tube 1 from flowing backward, 3 pipe diameter sizes of outlet pipe are close with inlet manifold pipe diameter in other embodiments, or outlet pipe 3 and inlet tube 1 distribute under the mixed and disorderly condition, the experimenter of being convenient for distinguishes inlet tube 1 and outlet pipe 3.

Water is fed from the water inlet 11 every day, the acidic anolyte flows to the water outlet 31 under the action of water pressure, so that the alkaline catholyte on the surface of the soil can be neutralized, and the neutralized liquid is filtered and pumped into the water inlet 11 again, so that the water is saved. Simultaneously, water and chemicals are replaced in one water inlet 11, the water and chemicals can act on the four anode placing pipes simultaneously, and the control and regulation efficiency is high.

Example 2:

referring to fig. 4, the present embodiment is different from embodiment 1 in that the anode placing tube further includes a triangular prism 25 located below the placing section 22, and one side wall of the triangular prism 25 is fixed to the outer wall of the bottom of the placing section 22. The bottom side edges of the triangular prism 25 enable the placing section 22 to be pressed into the soil more easily, and the solid triangular prism 25 enables the center of gravity of the anode placing tube to be moved down after the pressing so that the anode placing tube is more stable in the soil. The cross section outline of the anode placing pipe at the placing section 22 in the embodiment is quadrilateral, and further, four vertexes of the quadrilateral are located on the same circle, so that the cross section of the anode placing pipe at the placing section 22 is more approximate to a circle, the design length of the transition pipe is reduced, the partial length of the round pipe on the first connecting section and the second connecting section can be correspondingly increased, the connection strength between the water inlet branch pipe and the water outlet pipe is increased, the length of the placing section 22 can also be increased, the length of the anode rod 4 placed in the placing section 22 is increased, and the treatment efficiency and the treatment range of heavy metals in soil are increased.

Example 3:

referring to fig. 5, the present embodiment is different from embodiment 1 in that the upper end of the water inlet main pipe is provided with a water collecting funnel 12 for increasing the area of the water inlet 11, and the upper end of the water outlet pipe 3 is provided with a ring cover 32 for reducing the area of the water outlet 31. The rainwater collection funnel 12 can increase the rainwater amount collected at the water inlet 11 during raining, and the rainwater amount falling into the water outlet 31 after the area of the water outlet 31 is shrunk is less than that at the water inlet 11, so that the liquid anolyte is prevented from flowing backwards from the water outlet 31 to the water inlet 11 under the condition of ensuring rainwater collection and utilization.

The outer wall of this embodiment outlet pipe 3 above the soil still is provided with annular buffering lid 37, and the mid portion undercut of buffering lid 37 for whole buffering lid 37 becomes the bowl form, and the liquid that delivery port 31 department overflowed falls soil surface again after the buffering of buffering lid 37, thereby avoids soil surface to form the hole.

Example 4:

referring to fig. 6, the present embodiment is different from embodiment 1 in that the outlet pipe 3 is not an L-shaped pipe.

In this embodiment, the top of the water outlet pipe 3 is opened to form a water outlet 31, the bottom of the water outlet pipe 3 protrudes downwards to form a conical sand collecting funnel 36, so that the bottom of the water outlet pipe 3 is sealed, and the sand collecting funnel 36 is enclosed to form a sand storage tank 35. The bottom cone portion of the sand funnel 36 also makes it easier for the outlet pipe 3 to penetrate into the soil.

At least two mounting holes 34 have been seted up to outlet pipe 3's lateral wall, the edge of mounting hole 34 extends towards outlet pipe 3 and forms annular wall 33, be provided with the internal thread on the annular wall 33, the pipe portion outer wall of second linkage segment is provided with the external screw thread, second linkage segment and annular wall 33 threaded connection, so that the second linkage segment inserts to outlet pipe 3 in, deposit in sand storage tank 35 behind placing the interior silt of section via anolyte inflow outlet pipe 3, thereby avoid placing intraductal anolyte flow and be blockked up by silt and the anode rod is covered by silt. The pipe can be placed to a plurality of positive poles to the 34 quantity increase back of mounting hole on outlet pipe 3, can also form the positive pole in addition and place the pipe, outlet pipe 3, the pipe is placed to the positive pole, the structure that outlet pipe 3 communicates in proper order to greatly expand electronic soil heavy metal removing device's soil treatment scope, reduce electronic soil heavy metal removing device's use quantity, promote single electronic soil heavy metal removing device's soil improvement efficiency.

The design of the internal thread on the annular wall 33 enables the outer wall surface of the water outlet pipe 3 to be a cylindrical surface, so that the contact area between the water outlet pipe 3 and the soil when the water outlet pipe is installed in the soil is reduced, and the installation resistance of the water outlet pipe 3 is reduced. Outlet pipe 3 may be plugged into mounting hole 34 with a threaded PVC plug after removal from the soil.

Example 5:

the difference between this embodiment and embodiment 1 is that the surface of the anode rod is coated with teflon mesh, and the anode rod, the teflon mesh and the exposed metal part of the lead are clamped by a silica gel sleeve to prevent the metal part of the lead from being corroded in the treatment process. The pores in the silica gel sleeve are filled with polytetrafluoroethylene films, so that the sealing property is enhanced.

While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (10)

1. The utility model provides an electronic soil heavy metal remove device, a serial communication port, including the anode bar, the inlet tube, pipe and outlet pipe are placed to the positive pole, the inlet tube, the positive pole is placed the pipe and is communicate in proper order with the outlet pipe, the setting of pipe level is placed to the positive pole, the positive pole is placed the pipe and is included placing the section, the shape of cross section of placing the section is isosceles triangle, the anode bar is along placing the axial setting of section and placing the section in, the anode bar supports on the diapire of placing the section, the bottom of placing the section supplies the liquid flow that the inlet tube flowed in, the point form top of placing the section collects the gas that anode bar department produced, the lateral wall bottom of placing the section is provided with the hole of permeating water of anti-shield, the hole of permeating water of anti-shield avoids placing the section interior electrostatic shield and supplies to place section interior liquid and soil contact.

2. The electric soil heavy metal removing device according to claim 1, further comprising a power source and a cathode, wherein the cathode is laid on the soil surface in the form of an iron net, and the power source, the anode bar and the cathode are electrically connected in sequence.

3. The electric soil heavy metal removing device according to claim 2, wherein the water inlet pipe comprises a vertically arranged water inlet main pipe and a plurality of horizontally arranged water inlet branch pipes, the number of the anode placing pipes and the number of the water outlet pipes are the same as the number of the water inlet branch pipes, the water outlet pipes are vertically arranged, the anode placing pipes further comprise a first connecting section and a second connecting section which are arranged at two ends of the placing sections, one end of each water inlet branch pipe is communicated with the lower end of the water inlet main pipe, the other end of each water inlet branch pipe is communicated with the first connecting section, and the second connecting section is communicated with the lower end of each water outlet pipe.

4. The electric soil heavy metal removing device according to claim 3, wherein the upper end of the water inlet header pipe is 5cm higher than the upper end of the water outlet pipe.

5. The electric soil heavy metal removing device according to claim 3, wherein the parts of the first connecting section and the second connecting section, which are close to the placing section, are transition pipes matched with the cross section of the placing section, the parts of the first connecting section and the second connecting section, which are far away from the placing section, are round pipes, and the end parts of the water inlet branch pipe and the water outlet pipe are round pipes.

6. The electric soil heavy metal removing device according to claim 5, wherein the anode placing tube further comprises a triangular prism body located below the placing section, and one side wall of the triangular prism body is fixed to the bottom surface of the placing section.

7. The device for electrically removing heavy metals from soil according to claim 3, wherein all the wires connecting the anode rods to the power source are wound and gathered at the water inlet manifold via the respective water inlet branch pipes.

8. The electric soil heavy metal removing device according to claim 3, wherein the upper end of the water inlet main pipe is positioned above the soil, the upper end of the water inlet main pipe is provided with a water collecting funnel for increasing the area of the water inlet, and the upper end of the water outlet pipe is provided with a ring cover for reducing the area of the water outlet.

9. The electric soil heavy metal removal device of claim 5, wherein the bottom of the water outlet pipe protrudes downwards to form a conical sand collecting funnel, the side wall of the water outlet pipe is provided with at least two mounting holes, the edge of each mounting hole extends inwards towards the water outlet pipe to form an annular wall, the annular wall is provided with internal threads, the outer wall of the circular pipe part of the second connecting section is provided with external threads, and the second connecting section is in threaded connection with the annular wall.

10. The electric soil heavy metal removal device of claim 1, wherein the surface of the anode rod is coated with a polytetrafluoroethylene thin net, the anode rod and the polytetrafluoroethylene thin net are fixed through a silica gel sleeve, and a polytetrafluoroethylene film is filled in a gap in the silica gel sleeve.

Images