CN218252135U - Electrode system for active cleaning type soil electric remediation - Google Patents

Abstract

The utility model discloses an electrode system for electronic restoration of initiative clean formula soil, including outer guard shield, interior partition screen panel, clean module and electrode body, interior partition screen panel setting is in outer guard shield, and the electrode body is vertical assigns into in interior partition screen panel, and clean module sets up in interior partition screen panel for clean the electrode body. The electrode system adopts a layered structure, the outer shield can bear the pressure of a soil body and prevent larger particles of soil from entering electrode liquid, gel for adsorbing a buffer medium is filled in a gap between the outer shield and the inner shield, the effects of adsorbing pollutants such as heavy metal ions and balancing the pH of the electrode liquid can be achieved, the influence on the soil due to alkalization/acidification of the electrode liquid is reduced, the electrode bar adopts a bar-shaped inert electrode and a cleaning module, the phenomenon of current reduction caused by electrode activation polarization, resistance polarization and concentration polarization can be obviously improved, the energy consumption can be further reduced, the repair efficiency is improved, and the electrode system is particularly suitable for electric repair of the polluted soil.

Description

Electrode system for active cleaning type soil electric remediation

Technical Field

The utility model belongs to the technical field of soil remediation, especially, relate to an electrode system for electronic restoration of initiative clean formula soil.

Background

The electric restoration technology can treat soil and sediments of heavy metals, organic pollutants and composite pollutants, has wide application prospect, the electrode is indispensable equipment for electric restoration of the polluted soil, and after the electric restoration is carried out for a period of time, the current can obviously decrease relative to the initial current, so that the restoration efficiency is reduced, the energy consumption is increased, and the field application of the electric restoration is greatly restricted.

Studies have shown that the most important factor causing the reduction of the current is the polarization of the electrodes: firstly, hydrogen and oxygen bubbles generated by hydrolysis reaction on the electrode cover the surface of the electrode, and the bubbles are good insulators and can obviously reduce the conductivity of the electrode, which is called as activation polarization; secondly, as the test is carried out, insoluble salts or other impurities in the solution or the soil are adsorbed on the surface of the electrode to form a layer of deposited film, so that the conductivity of the electrode is reduced, and the current is reduced, which is called resistance polarization; thirdly, hydrogen ions generated by the cathode and hydroxyl generated by the anode are concentrated in respective electrode areas and are neutralized without timely diffusion, so that the current is reduced, and the concentration polarization is called. In addition, electrolysis of water results in acidification of the soil near the anode region, which typically lowers the zeta potential, further resulting in reverse electroosmosis, thereby reducing remediation efficiency; the electrolytic water alkalifies the soil near the cathode area, and the heavy metal hydroxide generated by the combination of the heavy metal ions and the hydroxide ions generated by the cathode blocks the capillary pores of the soil, so that the substance flow is blocked, and the remediation efficiency is reduced.

At present, aiming at the problem of electrode polarization, methods such as developing new materials and increasing electrode area exist, but the problems of resistance increase, energy consumption increase, repair efficiency reduction and the like caused by electrode polarization are still not effectively solved. Aiming at the problems of soil acidity and basification, methods adopting a microfiltration membrane and an ion selective membrane exist, but the methods have the problems of short service life, easy blockage and the like, and can not effectively reduce the problems of soil acidity and basification caused by electrolysis and reduce the repair efficiency.

In order to solve the problems, it is urgently needed to develop an electrode for electrokinetic remediation of contaminated soil, and compared with a conventional electrode, the electrode can effectively reduce the problems of electrode polarization, soil acidity, alkalization and the like, so that the energy consumption is reduced, the remediation efficiency is improved, and the electrode is particularly suitable for electrokinetic remediation of contaminated soil.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an electrode system for electronic restoration of initiative clean formula soil is provided, compare with conventional electrode, this electrode can effectively reduce electrode polarization to reduce the energy consumption, improve the repair efficiency, with the problem of solving current electrode performance ideal inadequately.

The technical scheme of the utility model as follows:

an active cleaning type electrode system for soil electric restoration comprises an outer shield, an inner partition net cover, a cleaning module and an electrode body, wherein the inner partition net cover is arranged in the outer shield, the electrode body is vertically inserted into the inner partition net cover, and the cleaning module is arranged in the inner partition net cover and used for cleaning the electrode body;

the outer protective cover comprises a conical cover and an outer net cylinder, and the conical cover is arranged at the lower end of the outer net cylinder;

the inner partition net cover comprises a bottom plate, an inner side net cylinder, a cover plate, an electrode liquid input pipe and a drain pipe; the cover plate is arranged at the top of the inner mesh cylinder, the bottom plate is arranged at the bottom of the inner mesh cylinder, tapered holes are formed in the center positions of the bottom plate and the cover plate, and the tapered holes in the cover plate are larger than the tapered holes in the bottom plate; the electrode liquid input pipe and the drain pipe are arranged on the cover plate and are communicated with the inside of the inner side net cylinder; the cover plate is also provided with an exhaust hole;

the cleaning module comprises a motor, a screw rod, a T-shaped screw rod nut, a cleaning brush, a guide rod, an upper fixing plate and a lower fixing plate; the motor is fixed on the upper fixing plate, and the upper fixing plate is in a conical disc shape and is matched with the conical hole of the cover plate of the inner isolation mesh enclosure; the lower fixing plate is positioned right below the upper fixing plate, is in a conical disc shape and is matched with the conical hole of the bottom plate of the inner isolation mesh enclosure; the guide rod is fixedly arranged between the upper fixing plate and the lower fixing plate, the screw rod is rotatably arranged between the upper fixing plate and the lower fixing plate, the top end of the screw rod is connected with an output shaft of the motor, the T-shaped screw rod nut is arranged on the screw rod and the guide rod, and the cleaning brush is connected with the T-shaped screw rod nut; the upper fixing plate and the lower fixing plate are also provided with mounting holes for mounting the electrode body, and the cleaning brush is sleeved on the electrode rod of the electrode body.

In the technical scheme, the outer net barrel is made of a semi-rigid composite material net, and larger particles of soil are prevented from entering electrode liquid while bearing the pressure of the soil body; and a circle of reinforcing edge is arranged at the upper end edge of the outer net barrel.

In the above technical scheme, the bottom plate and the cover plate are made of nylon.

In the technical scheme, the number of the exhaust holes is multiple, the exhaust holes are circumferentially arranged at equal intervals, and the gas generated by electrolysis can be effectively exhausted.

In the technical scheme, the electrode liquid input pipe and the blow-off pipe are made of non-metal materials such as PVC and are provided with the elbows to facilitate the external connection of the extension pipes.

In the technical scheme, the drain pipe extends to the bottom of the inner side net cylinder, and can be connected with an external pumping device to pump out polluted electrode liquid.

In the technical scheme, the electrode body comprises an electrode rod, a short cable head, a cable waterproof joint, a potting pipe, potting epoxy resin, a handheld pipe and a waterproof rubber plug; the top end of the electrode rod is fixedly connected with one end of the short cable head, the other end of the short cable head is provided with the cable waterproof connector, and the short cable head can be conveniently connected with an external cable through the cable waterproof connector; the encapsulation pipe is sleeved at the top end of the electrode rod, and the encapsulation pipe is filled with encapsulation epoxy resin; the handheld pipe is inserted into the upper end of the filling and sealing pipe, and a waterproof rubber plug is embedded into an end opening at the top of the handheld pipe.

In the technical scheme, the gel for adsorbing the buffer medium is filled in the gap between the outer protective cover and the inner partition net cover, so that the effects of adsorbing pollutants such as heavy metal ions and balancing the pH value of the electrode solution are achieved, and the influence of alkalization/acidification of the electrode solution on soil is reduced.

In the technical scheme, the active cleaning type electrode system for soil electric restoration further comprises a rain cover, the rain cover is arranged on the handheld pipe, a motor can be protected, and rainwater is prevented from directly entering electrode liquid.

In the technical scheme, the liquid level sensor is arranged on the inner side net barrel of the inner separation net cover and used for monitoring the liquid level of the electrolyte so as to further control the external liquid adding device to realize liquid level control.

The utility model has the advantages and positive effects that:

1. the utility model discloses electrode system is equipped with the clean module of electrode bar, can realize that the electrode bar is clean regularly: the cleaning brush can remove air bubbles on the surface of the electrode so as to reduce activation polarization; the electrode solution can be stirred by the up-and-down movement of the cleaning brush, so that the concentration polarization is reduced, the problems of resistance increase, energy consumption increase, repair efficiency reduction and the like caused by electrode polarization are effectively reduced, the energy consumption is reduced, the repair efficiency is improved, and the electrode solution has remarkable economic benefit.

2. The utility model discloses electrode system adopts the double-deck electrode guard shield, fills the gel that adsorbs the buffering medium between the guard shield, can play the effect of adsorbing pollutants such as heavy metal ion, balanced electrode liquid pH, reduces because of the influence of electrode liquid alkalization/acidizing to soil to further play the effect that improves remediation efficiency.

3. The electrode system of the utility model can automatically supplement electrode liquid, thereby reducing the labor cost; the disassembly is convenient, and the assembly and the transportation are simple and convenient; the structure of a pointed bottom cylinder is adopted, so that the shape is regular and the arrangement is easy; the system can be used as a cathode or an anode, and has strong applicability; the rain cover is matched, so that the environmental suitability is strong.

Drawings

Fig. 1 is an assembly schematic of the present invention;

FIG. 2 is a schematic structural view of an outer shroud of the present invention;

fig. 3 is a schematic structural view of the inner partition net cover in the present invention;

fig. 4 is a schematic structural view of an electrode body in the present invention;

fig. 5 is a schematic structural view of a cleaning module of the present invention;

fig. 6 is a schematic sectional structure of the present invention;

fig. 7 is a schematic cross-sectional structure view of another view of the present invention.

In the figure:

1. outer shield 2, interior partition screen panel 3, clean module

4. Electrode body 5, motor 6, motor mount

7. Screw 8, coupling 9, bearing

10. T-shaped screw rod nut 11, connecting piece 12 and cleaning brush

13. Guide rod 14, guide rod bearing 15 and upper fixing plate

16. Lower fixed plate 17, rain cover 18 and floating ball type liquid level sensor

19. Conical cover 20, outer net barrel 21 and reinforcing edge

22. Bottom plate 23, inner side net barrel 24 and cover plate

25. Electrode liquid input pipe 26, sewage discharge pipe 27 and gel

28. Electrode bar 29.1, short cable head 30 and cable waterproof joint

31. Potting pipe 32, potting epoxy resin 33 and handheld pipe

34. Waterproof rubber plug 35, exhaust hole

Detailed Description

The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the present disclosure, as defined by the following claims.

Example 1

An active cleaning type electrode system for soil electric restoration is shown in the attached figure 1 and comprises an outer shield 1, an inner partition net cover 2, a cleaning module 3 and an electrode body 4, wherein the inner partition net cover 2 is arranged in the outer shield 1, the electrode body 4 is vertically inserted into the inner partition net cover 2, and the cleaning module 3 is arranged in the inner partition net cover 2 and used for cleaning the electrode body 4. The structure of the present electrode system will be specifically described below.

Referring to fig. 2, the outer shield 1 comprises a conical shield 19, an outer mesh cylinder 20 and a reinforcing rim 21; the conical cover 19 is arranged at the lower end of the outer net cylinder 20, is made of nylon, can support the outer net cylinder 20 and is convenient for the outer protective cover 1 to be inserted into soil; the outer net barrel 20 is made of a semi-rigid composite material net, and can bear the pressure of a soil body and prevent larger particles of the soil from entering electrode liquid; the reinforcing rim 21 is provided at the upper end of the outer net drum 20.

Referring to fig. 3, the inner partition net cover 2 comprises a bottom plate 22, an inner side net cylinder 23, a cover plate 24, an electrode liquid input pipe 25 and a sewage discharge pipe 26; the cover plate 24 is arranged at the top of the inner side net cylinder 23, the bottom plate 22 is arranged at the bottom of the inner side net cylinder 23, the inner side net cylinder 23 is a semi-rigid composite material net and can further filter pollutants on the soil side, the bottom plate 22 and the cover plate 24 are made of nylon, conical holes are formed in the center positions of the bottom plate 22 and the cover plate 24, and the conical holes in the cover plate are larger than those in the bottom plate and are used for placing the electrode body and the cleaning module; the cover plate 24 is also provided with a plurality of vent holes 35 which are circumferentially arranged at equal intervals and can effectively discharge gas generated by electrolysis; the electrode liquid input pipe 25 and the sewage discharge pipe 26 are arranged on the cover plate 24 and communicated with the inside of the inner side net barrel 23, and the electrode liquid input pipe 25 can be connected with an external liquid adding device so as to supplement electrode liquid; the blow off pipe 26 will extend to the bottom of the inner side net cylinder 23, the blow off pipe 26 can be connected with an external pumping device, the electrode liquid polluted by the air is further processed, the electrode liquid input pipe 25 and the blow off pipe 26 are made of non-metal materials such as PVC and are provided with elbows convenient for external extension pipes.

Referring to fig. 4 and 6, the electrode body 4 includes an electrode rod 28, a short cable head 29.1, a cable waterproof joint 30, a potting tube 31, a potting epoxy resin 32, a handheld tube 33, and a waterproof rubber plug 34; the electrode bar 28 is made of titanium, platinum, stainless steel, graphite and the like, the top end of the electrode bar 28 is fixedly connected (connected in a welding or riveting mode and the like) with one end of the short cable head 29.1, the other end of the short cable head 29.1 is provided with the cable waterproof connector 30, and the cable waterproof connector 30 can be conveniently connected with an external cable 29.2, so that the transportation and the installation are convenient; the potting pipe 31 is sleeved at the top end of the electrode rod 28, and the potting epoxy resin 32 is filled in the potting pipe 31, so that the joint of the electrode rod 28 and the short cable head 29.1 is protected, and corrosion and disconnection are avoided; the handheld pipe 33 is inserted into the upper end of the potting pipe 31, and a waterproof rubber plug 34 is embedded into the top end of the handheld pipe 33 so as to further prevent rainwater and the like from entering the cable waterproof joint 30 in the handheld pipe 33; furthermore, the hand-held tube 33 and the filling and sealing tube 31 are made of non-metallic materials such as PVC.

Referring to fig. 5-7, the cleaning module 3 includes a motor 5, a motor fixing frame 6, a screw 7, a T-shaped screw nut 10, a connecting member 11, a cleaning brush 12, a guide rod 13, an upper fixing plate 15, and a lower fixing plate 16; the motor 5 is a stepping motor and has functions of timing start-stop and forward and reverse rotation control, the motor 5 is fixed on an upper fixing plate 15 through a motor fixing frame 6, the upper fixing plate 15 is in a conical disc shape and is matched with a conical hole of a cover plate 24 of the inner partition net cover 2, and the motor can be stably placed on the conical hole of the cover plate to form a detachable installation structure; the lower fixing plate 16 is positioned right below the upper fixing plate 15, the lower fixing plate 16 is also in a conical disc shape, is matched with the conical hole of the bottom plate 22 of the inner partition net cover 2, and can be stably placed on the conical hole of the bottom plate; the guide rods 13 are fixedly arranged between the upper fixing plate 15 and the lower fixing plate 16, and the number of the guide rods 13 is preferably two and the guide rods are arranged in parallel; the screw 7 is rotatably arranged between an upper fixing plate 15 and a lower fixing plate 16 through a bearing 9, the top end of the screw 7 is connected with an output shaft of the motor 5 through a coupling 8, so that the motor 5 can drive the screw 7 to rotate, the T-shaped screw nut 10 is arranged on the screw 7 and the guide rod 13 (the T-shaped screw nut is slidably arranged on the guide rod 13 through a guide rod bearing 14), and the screw 7 can drive the T-shaped screw nut 10 to move along the guide rod 13 when rotating; the cleaning brush 12 is connected with the T-shaped screw rod nut 10 through a connecting piece 11, and the cleaning brush 12 is cylindrical; mounting holes for mounting the electrode body 4 are further formed in the upper fixing plate 15 and the lower fixing plate 16, so that the electrode body 4 is vertically inserted into the upper fixing plate 15 and the lower fixing plate 16, the cleaning brush 12 is sleeved on the electrode rod 28 of the electrode body 4, and the cleaning brush 12 is used for cleaning the electrode rod 28 up and down in a reciprocating manner by controlling the motor 5 to rotate forward and backward. Further, the motor fixing frame 6 is made of stainless steel; the bearing 9 is made of ceramic, POM and other materials; the T-shaped screw rod nut 10 is made of POM; the guide rod bearing 14 is a fiber nylon Long Zhixian bearing; the cleaning brush 12 is made of non-conductive nylon wire, sponge and the like; the connecting piece 11, the upper fixing plate 15 and the lower fixing plate 16 are made of nylon, polytetrafluoroethylene and the like.

Furthermore, the gap between the outer shield 1 and the inner partition net cover 2 is filled with gel 27 for absorbing buffer medium, which can absorb pollutants such as heavy metal ions and balance the pH of the electrode solution, thereby reducing the influence of alkalization/acidification of the electrode solution on the soil.

Further, the active cleaning type electrode system for soil electric restoration further comprises a rain cover 17 and a floating ball type liquid level sensor 18, wherein the rain cover 17 is arranged on the handheld pipe 33, so that the motor 5 can be protected, and rainwater is prevented from directly entering the electrode liquid; the floating ball type liquid level sensor 18 is arranged on the inner side mesh cylinder 23 of the inner partition mesh enclosure 2, can monitor the liquid level of electrolyte and is used for further controlling an external liquid adding device to realize liquid level control.

The electrode system adopts a layered structure, the outer shield 1 can bear the pressure of soil and prevent larger particles of soil from entering electrode liquid, and gel 27 for adsorbing a buffer medium is filled in a gap between the outer shield 1 and the inner partition net cover 2, so that the effects of adsorbing pollutants such as heavy metal ions and balancing the pH of the electrode liquid can be achieved, and the influence on the soil caused by alkalization/acidification of the electrode liquid is reduced; the electrode bar 28 adopts a bar-shaped inert electrode and is matched with the cleaning module 3, so that the current reduction phenomenon caused by electrode activation polarization, resistance polarization and concentration polarization can be obviously improved, the effects of reducing energy consumption and improving the repair efficiency can be further achieved, and the electric repairing device is particularly suitable for the electric repairing of the polluted soil.

Example 2

Based on the embodiment 1, the active cleaning method of the electrode system for electrokinetic soil remediation based on the active cleaning type comprises the following steps:

1. placing method

(1) Drilling a drill hole slightly larger than the outer diameter of the outer shield at the position of soil body needing to be provided with the electrode;

(2) Pressing the outer protective cover into the drill hole;

(3) Injecting a volume of gel into the outer shield;

(4) The electrode body is arranged in the inner partition net cover, and then the inner partition net cover is integrally placed in the outer shield;

(5) Connecting an external device: one end of an external cable penetrates through the rubber plug and the handheld pipe to be connected to the upper end of the waterproof cable joint, the handheld pipe is screwed into the potting pipe, and the rubber plug is screwed tightly; connecting the other end of the external cable to a direct current power supply; connecting a motor with a controller and a power supply, and connecting the power supply of the floating ball type liquid level sensor with a relay for controlling an external liquid adding device; the sewage discharge pipe is connected with an external water pumping device, and the electrode liquid input pipe is connected with an external liquid adding device.

2. Automatic fluid infusion method

Starting an external liquid adding device, and stopping the external liquid adding device from adding liquid by the floating ball type liquid level sensor through a control relay after the electrode liquid reaches the position of the floating ball type liquid level sensor; when the liquid level of the electrode liquid drops to a certain degree, the floating ball type liquid level sensor starts liquid adding of the external liquid adding device through the control relay and automatically stops after reaching the preset liquid level.

3. Active cleaning method

The motor controller controls the motor to realize timing start and stop and positive and negative rotation, the motor is started regularly according to field requirements during use, the motor drives the screw rod to rotate at regular intervals, the cleaning brush can reciprocate up and down on the electrode rod to play a role in cleaning the electrode rod, and meanwhile, the connecting piece and the cleaning brush can further play a role in stirring electrode liquid through up-and-down movement.

The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.

Claims (10)

1. The utility model provides an electrode system for electronic restoration of initiative clean formula soil which characterized in that: the electrode body cleaning device comprises an outer shield, an inner partition net cover, a cleaning module and an electrode body, wherein the inner partition net cover is arranged in the outer shield, the electrode body is vertically inserted into the inner partition net cover, and the cleaning module is arranged in the inner partition net cover and used for cleaning the electrode body;

the outer protective cover comprises a conical cover and an outer net cylinder, and the conical cover is arranged at the lower end of the outer net cylinder;

the inner partition net cover comprises a bottom plate, an inner side net cylinder, a cover plate, an electrode liquid input pipe and a drain pipe; the cover plate is arranged at the top of the inner mesh cylinder, the bottom plate is arranged at the bottom of the inner mesh cylinder, the center positions of the bottom plate and the cover plate are provided with conical holes, and the conical holes in the cover plate are larger than the conical holes in the bottom plate; the electrode liquid input pipe and the drain pipe are arranged on the cover plate and are communicated with the inside of the inner side net cylinder; the cover plate is also provided with an exhaust hole;

the cleaning module comprises a motor, a screw rod, a T-shaped screw rod nut, a cleaning brush, a guide rod, an upper fixing plate and a lower fixing plate; the motor is fixed on an upper fixing plate, and the upper fixing plate is in a conical disc shape and is matched with a conical hole of the cover plate of the inner partition net cover; the lower fixing plate is positioned right below the upper fixing plate, is in a conical disc shape and is matched with the conical hole of the bottom plate of the inner isolation mesh enclosure; the guide rod is fixedly arranged between the upper fixing plate and the lower fixing plate, the screw rod is rotatably arranged between the upper fixing plate and the lower fixing plate, the top end of the screw rod is connected with an output shaft of the motor, the T-shaped screw rod nut is arranged on the screw rod and the guide rod, and the cleaning brush is connected with the T-shaped screw rod nut; the upper fixing plate and the lower fixing plate are also provided with mounting holes for mounting the electrode body, and the cleaning brush is sleeved on the electrode rod of the electrode body.

2. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: and a circle of reinforcing edge is arranged at the upper end edge of the outer net barrel.

3. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: the bottom plate and the cover plate are made of nylon.

4. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: the quantity of exhaust hole is a plurality of, is the equidistant arrangement of circumference.

5. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: the electrode liquid input pipe and the drain pipe are made of PVC materials and are provided with elbows.

6. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: the blow off pipe will extend to the bottom of the inner side net barrel and is used for being connected with an external pumping device.

7. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: the electrode body comprises an electrode bar, a short cable head, a cable waterproof joint, a potting pipe, potting epoxy resin, a handheld pipe and a waterproof rubber plug; the top end of the electrode rod is fixedly connected with one end of the short cable head, the other end of the short cable head is provided with the cable waterproof connector, and the short cable head can be conveniently connected with an external cable through the cable waterproof connector; the encapsulation pipe is sleeved at the top end of the electrode rod, and the encapsulation pipe is filled with encapsulation epoxy resin; the handheld pipe is inserted into the upper end of the filling and sealing pipe, and a waterproof rubber plug is embedded into an end opening at the top of the handheld pipe.

8. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: and gel for adsorbing a buffer medium is filled in a gap between the outer shield and the inner partition screen.

9. The actively cleaned soil electrokinetic remediation electrode system of claim 1, wherein: the electrode system for the active cleaning type soil electric restoration further comprises a rain cover, and the rain cover is arranged on the handheld pipe.

10. The active cleaning electrokinetic remediation electrode system of claim 1, wherein: a liquid level sensor is arranged on the inner side mesh cylinder of the inner partition mesh cover.

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