CN219597676U - Electrocatalytic treatment device for removing pollutants in soil - Google Patents

Abstract

The utility model relates to the technical field of electrocatalysis, in particular to an electrocatalysis treatment device for removing pollutants in soil. The electrocatalytic treatment device for removing pollutants in soil comprises a tubular electrode, wherein a microporous filter membrane is arranged on the tubular electrode, one side of the upper end of the tubular electrode is connected with a power supply through an electrode lead, the other side of the upper end of the tubular electrode is connected with one end of an exhaust pipe, the other end of the exhaust pipe is connected with a vacuum pump, a water outlet pipe is arranged on one side of the tubular electrode, and one side of the water outlet pipe is connected with a clean water pipe through a water treatment module. Compared with the prior art, the method has the advantages of high efficiency, short time, low energy consumption and low overall operation treatment cost, can realize low-cost and large-scale practical engineering application, and effectively solves the problem of soil pollution.

Description

Electrocatalytic treatment device for removing pollutants in soil

Technical Field

The utility model relates to the technical field of electrocatalysis, in particular to an electrocatalysis treatment device for removing pollutants in soil.

Background

Water pollution is caused by industrial production, such as mining, metallurgy, electroplating, chemical industry, circuit board processing and the like, and soil pollution is caused by water pollution. After soil pollution, especially after heavy metal ions and refractory organic matters such as benzene and phenols are polluted, the soil is difficult to be purified and treated. Common heavy metal ions such as nickel, chromium, copper, zinc, cadmium, mercury, arsenic, lead and the like have high toxicity, and water pollution is easy to be caused if soil is polluted. The traditional treatment method mainly comprises the steps of planting plants which are easy to absorb heavy metal ions in the polluted soil, wherein the plants have limited absorption of the heavy metal ions, so that the treatment efficiency is low, the period is long, and the heavy metal ions in the soil can be reduced to a safe range generally within 5-10 years. And the plant containing heavy metal ions is easy to cause secondary pollution. Micro-pollutants in soil can be treated by adopting a microorganism such as a bacterial method, but the soil or sludge with higher concentration of heavy metal ions has unsatisfactory removal effect due to higher toxicity.

The technology of restoring soil by an electrochemical method developed in recent years can restore contaminated soil faster. For example, the utility model patent application with publication number of CN111822495A adopts microwave heating to desorb organic matters in soil and electrochemical catalytic oxidation to repair the soil by a process of adding nutrient solution for microorganism treatment; the utility model patent application with publication number of CN114769305A is to perform electrochemical catalytic oxidation treatment on volatile organic pollutants in soil by means of heating water vapor and ultrasonic vibration. The utility model patent with publication number of CN114769305A adopts heating water as steam and then injecting the steam into soil for heating so as to enable Volatile Organic Compounds (VOC) in the soil to be desorbed, a vacuum pump pumps out the vapor (VOC adsorption treatment) gas and then needs to be condensed for recycling, an ultrasonic probe is used for vibrating, cavitating and heating the soil so as to avoid hardening of the soil, an electrode plate is used for electrochemical catalytic oxidation reaction so as to strengthen decomposition of the organic matters, the technologies all carry out desorption and electrochemical oxidation of the organic matters by heating the soil to remove the organic pollutants in the soil, the parts inserted into the soil are more, the treatment process is more complex, the energy consumption required in the treatment process is higher, and the operation cost is higher; meanwhile, the nutrient solution is heated in the soil for restoration, so that the treatment cost is further increased. The utility model patent with publication number of CN 113843271A improves the efficiency of removing chromium ions in soil by an improved electrochemical method of a three-dimensional electrode. The utility model patent with publication number of CN 113083874A adopts an integrated electrochemical device to remove and repair heavy metal ions in soil, and the soil needs to be treated in the device, so that the method is only suitable for purifying a small amount of soil. The utility model patent with publication number of CN 111744947A discloses a heavy metal-rich soil remediation device, which has more mechanical transmission parts and the like, is suitable for small-area soil remediation, and cannot carry out low-cost remediation treatment on large-area polluted soil.

The electrochemical repair technology has the problems of high operation cost, suitability for soil local pollution treatment, suitability for soil pollution treatment with a small amount and a small area, and the like. The utility model needs to invent a purification and repair technology suitable for large-area or large-quantity soil pollution treatment and low running cost to solve the problem of practical engineering application. In addition, in industrial or municipal sewage treatment, pollution of heavy metal ions and organic matters of sludge is often caused by mixing of industrial sewage, pollution of soil is also caused after sludge landfill, and a technology suitable for sludge purification treatment is also required to be developed at low cost.

In order to solve the problems of difficult purification treatment and low cost treatment for engineering application of the polluted soil or sludge, the utility model utilizes the electrocatalytic principle under the action of an electric field and the synergistic effect under the negative pressure of vacuumizing to dissolve and separate soluble heavy metal ions or organic matters in the soil or sludge or remove the heavy metal ions or organic matters on line, so that the soil or sludge pollution treatment is converted into the removal treatment of ions and organic matters in the water without heating and adding nutrient solution. And meanwhile, the tubular electrode is adopted to perform in-situ reaction, and polluted water in the soil can be extracted, and pollutants in the water, such as organic matters and heavy metal ions, are subjected to advanced treatment and then are reinjected into the soil for recycling. The technology has the characteristics of high efficiency, short time, low energy consumption, low overall operation treatment cost and the like for removing heavy metal ions or organic molecules in soil or sludge, can realize low-cost and large-scale practical engineering application, and effectively solves the problem of soil pollution.

Disclosure of Invention

The utility model provides an electrocatalytic treatment device for removing pollutants in soil, which aims to overcome the defects of the prior art.

In order to achieve the above purpose, an electrocatalytic treatment device for removing pollutants in soil is designed, and comprises a tubular electrode, wherein a microporous filter membrane is arranged on the tubular electrode, one side of the upper end of the tubular electrode is connected with a power supply through an electrode lead, the other side of the upper end of the tubular electrode is connected with one end of an exhaust tube, the other end of the exhaust tube is connected with a vacuum pump, a water outlet pipe is arranged on one side of the tubular electrode, and one side of the water outlet pipe is connected with a clean water pipe through a water treatment module.

The tubular electrode comprises a cathode tube and an anode tube, and an electrocatalytic film is arranged on the surface of the anode tube.

The thickness of the electrocatalytic film is 100nm-300 mu m.

The cathode tube and the anode tube are arranged in parallel.

The tubular electrode comprises a cathode tube and an anode tube which are concentrically arranged, and the anode tube is sleeved in the cathode tube.

The outside of the anode tube is provided with a separator, and the outside of the separator is abutted against the inner wall of the cathode tube.

The shape of the isolating piece is spiral.

The lower part of the tubular electrode is of a conical structure.

The tubular electrode is of a straight cylinder type structure, and a water inlet pipe is arranged on one side of the tubular electrode.

The interval between the cathode tube and the anode tube is 10-500mm, and the power supply voltage is 0.1-48V.

Compared with the prior art, the method has the advantages of high removal efficiency, short time, low energy consumption and low overall operation treatment cost, can realize low-cost and large-scale practical engineering application, and effectively solves the problem of soil pollution.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a tubular electrode according to an embodiment of the utility model.

Fig. 3 is a schematic structural diagram of a second embodiment of the present utility model.

Fig. 4 is a cross-sectional view of a second embodiment of the present utility model.

Fig. 5 is a top view of a second embodiment of the present utility model.

Fig. 6 is a schematic structural diagram of a third embodiment of the present utility model.

Fig. 7 is a cross-sectional view of a second embodiment of the present utility model.

Fig. 8 is a top view of a second embodiment of the present utility model.

Description of the embodiments

The utility model is further described below with reference to the accompanying drawings.

Embodiment one:

as shown in fig. 1 to 2, a microporous filter membrane 2 is arranged on a tubular electrode 1, one side of the upper end of the tubular electrode 1 is connected with a power supply through an electrode lead 5, the other side of the upper end of the tubular electrode 1 is connected with one end of an exhaust pipe 4, the other end of the exhaust pipe 4 is connected with a vacuum pump 6, a water outlet pipe 3 is arranged on one side of the tubular electrode 1, and one side of the water outlet pipe 3 is connected with a clean water pipe 8 through a water treatment module 7.

The tubular electrode 1 comprises a cathode tube 1-1 and an anode tube 1-2, wherein the anode tube 1-2 adopts a conductive substrate, and an electrocatalytic film is arranged on the surface of the anode tube 1-2, so that the tubular electrode has a catalytic oxidation function. The conductive substrate is selected from graphite, titanium or glass fiber net. The cathode tube 1-1 is made of conductive carbon or metal and has a catalytic reduction function.

The thickness of the electrocatalytic film is 100nm-300 μm.

The cathode tube 1-1 and the anode tube 1-2 are arranged in parallel.

When the tubular electrode 1 is particularly used, the tubular electrode 1 is in a straight cylinder structure, or the lower part of the tubular electrode 1 is in a conical structure, so that the tubular electrode 1 can be conveniently inserted into polluted wet soil or sludge. A water inlet pipe 10 is arranged on one side of the straight cylinder type tubular electrode 1.

When the embodiment is used, the cathode tube 1-1 is connected with the negative electrode of a power supply, the anode tube 1-2 is connected with the positive electrode of the power supply, a direct current or pulse direct current electric field is applied to the cathode and the anode, organic molecules and ions which are soluble in soil and comprise heavy metal ions are dissolved in water, and under the action of the electric field, the cathode and the anode migrate to the anode tube 1-2 and the cathode tube 1-1 respectively, and enter an electrode pipeline together with water through the microporous filter membrane 2 of the electrode. Because the negative pressure is formed in the tubular electrode 1 under the pumping action of the vacuum pump 6, water in the soil can be continuously pumped out, and the water is collected and then is connected into the water treatment module 7 for removing and purifying organic matters and ions in the water. The purified water can flow back to the soaked soil through the clear water pipe 8 for circulation treatment, and pollutants in the soil can be removed after multiple treatments.

In this embodiment, the water treatment module 7 includes a filter device and a water pump, and filters the water in the water outlet pipe 3 by the filter device and then flows out by the clean water pipe 8.

In this embodiment, the interval between the cathode tube 1-1 and the anode tube 1-2 is 10-500mm, and the power supply voltage is 0.1-48V.

The method is particularly used for purifying and repairing soil pollution in a large area with high efficiency and low cost by adopting a plurality of groups of tubular electrodes.

Embodiment two:

this embodiment only describes differences from the first embodiment, and the description is not repeated for the same points.

The difference between this embodiment and the first embodiment is that in this embodiment, the tubular electrode 1 includes a cathode tube 1-1 and an anode tube 1-2 concentrically arranged, and the anode tube 1-2 is sleeved inside the cathode tube 1-1. The cathode tube 1-1 and the anode tube 1-2 which are concentrically arranged reduce the occupied area, and are convenient for arranging a plurality of tubular electrodes 1.

Embodiment III:

this embodiment only differs from the second embodiment in that the description is not repeated.

The difference between this embodiment and the second embodiment is that in this embodiment, a spacer 9 is disposed on the outer side of the anode tube 1-2, the outer side of the spacer 9 abuts against the inner wall of the cathode tube 1-1, and the spacer 9 is used for fixing the spacing between the cathode tube 1-1 and the anode tube 1-2.

In this embodiment, the spacer 9 is spiral in shape to transmit directional movement of sludge.

Claims (10)

1. An electrocatalytic treatment device for removing pollutants in soil, comprising a tubular electrode, and characterized in that: the novel water treatment device is characterized in that a microporous filter membrane (2) is arranged on the tubular electrode (1), one side of the upper end of the tubular electrode (1) is connected with a power supply through an electrode lead (5), the other side of the upper end of the tubular electrode (1) is connected with one end of an exhaust tube (4), the other end of the exhaust tube (4) is connected with a vacuum pump (6), a water outlet pipe (3) is arranged on one side of the tubular electrode (1), and one side of the water outlet pipe (3) is connected with a clear water pipe (8) through a water treatment module (7).

2. An electrocatalytic treatment device for removing a contaminant from soil according to claim 1, wherein: the tubular electrode (1) comprises a cathode tube (1-1) and an anode tube (1-2), and an electrocatalytic film is arranged on the surface of the anode tube (1-2).

3. An electrocatalytic treatment device for removing a contaminant from soil according to claim 2, wherein: the thickness of the electrocatalytic film is 100nm-300 mu m.

4. An electrocatalytic treatment device for removing a contaminant from soil according to claim 2, wherein: the cathode tube (1-1) and the anode tube (1-2) are arranged in parallel.

5. An electrocatalytic treatment device for removing a contaminant from soil according to claim 2, wherein: the tubular electrode (1) comprises a cathode tube (1-1) and an anode tube (1-2) which are concentrically arranged, and the anode tube (1-2) is sleeved inside the cathode tube (1-1).

6. An electrocatalytic treatment apparatus for removing a contaminant from soil according to claim 5, wherein: the outside of the anode tube (1-2) is provided with a separator (9), and the outside of the separator (9) is abutted against the inner wall of the cathode tube (1-1).

7. An electrocatalytic treatment apparatus for removing a contaminant from soil according to claim 6, wherein: the shape of the isolating piece (9) is spiral.

8. An electrocatalytic treatment device for removing a contaminant from soil according to claim 1 or 2, wherein: the lower part of the tubular electrode (1) is of a conical structure.

9. An electrocatalytic treatment device for removing a contaminant from soil according to claim 1 or 2, wherein: the tubular electrode (1) is of a straight cylinder type structure, and a water inlet pipe (10) is arranged on one side of the tubular electrode (1).

10. An electrocatalytic treatment apparatus for removing a contaminant from soil according to claim 4 or 5, wherein: the spacing between the cathode tube (1-1) and the anode tube (1-2) is 10-500mm, and the power supply voltage is 0.1-48V.