Organic contaminated soil remediation device

Abstract

The invention relates to the technical field of soil remediation, in particular to an organic contaminated soil remediation device which comprises a storage bin, a photovoltaic water supply unit, a storage battery and an electrolysis unit. Sodium chloride particles are filled in the storage bin; the storage battery is used for storing power of the photovoltaic water supply unit and providing power for the electrolysis unit, and the storage battery is electrically connected with the electrolysis unit; the photovoltaic water supply unit comprises a photovoltaic panel, a follow current plate and a first connecting pipe, and the photovoltaic panel is arranged on the storage bin; the electrolysis unit is buried in soil and comprises an outer pipe, a pipe shaft, fiber cloth, a second connecting pipe and an air pipe, the adopted technology is a solar-assisted electrolysis technology, field soil remediation can be continuously achieved, manual control and operation are not needed in the remediation process, condensation water is used as a water source by means of the day and night temperature difference, and energy conservation and emission reduction are achieved. And the electrolyte is formed by combining sodium chloride in a storage bin.

Description

Technical Field

[0001] The present invention relates to the technical field of soil remediation, and particularly to a device for remediating organic contaminated soil. Background Art

[0002] The remediation of soil organic pollution aims to reduce the harm of organic pollutants in the soil, mainly by reducing the concentration of pollutants, fixing pollutants, converting them into low-toxic or non-toxic substances, and blocking the transfer pathways of pollutants. Its remediation technologies include the following categories:

[0003] 1. Physical remediation method. The physical remediation method uses physical means to treat and remediate organic contaminated soil. For example: soil replacement, thermal desorption, vapor extraction (also called soil vapor extraction), electrokinetic remediation, supercritical fluid technology, etc.

[0004] 2. Chemical remediation method. The chemical remediation method uses chemical reactions to decompose the pollutants in the soil into non-toxic small molecules. Such as soil washing technology, chemical oxidation, plasma degradation, photocatalytic degradation, solidification, etc. 3. Bioremediation technology. Bioremediation mainly uses the life metabolic activities of organisms to decompose the pollutants in the soil. There are mainly microbial remediation, phytoremediation and animal remediation, such as certain soil animals like earthworms, nematodes, etc.

[0005] Currently, the chemical remediation technology mainly involves injecting chemical substances into the soil. The amount of injection is difficult to control, and it is impossible to repair in situ relatively evenly. It is necessary to take measures such as ploughing to make the soil and the oxidant fully contact. The process is time-consuming and laborious, the project is huge, and a large number of large-scale machines are required to participate.

[0006] If an oxidant is injected, there will be problems such as the procurement, transportation, and storage of the oxidant, and there are great potential safety hazards. Summary of the Invention

[0007] The technical problem to be solved by the present invention is: in order to overcome the problems in the prior art that the chemical remediation technology mainly injects chemical substances into the soil, the injection amount is difficult to control, and it is impossible to repair in situ relatively evenly, a device for remediating organic contaminated soil is provided.

[0008] The technical solution adopted by the present invention to solve its technical problems is: an organic contaminated soil remediation device, including a storage bin, a photovoltaic water supply unit, a storage battery, and an electrolysis unit;

[0009] The storage bin is filled with sodium chloride particles;

[0010] The storage battery is used to store the electric power of the photovoltaic water supply unit and provide electric power for the electrolysis unit. The storage battery and the electrolysis unit are electrically connected;

[0011] The photovoltaic water supply unit includes a photovoltaic panel, a current continuation plate, and a first connecting pipe. The photovoltaic panel is arranged on the storage bin. The photovoltaic panel can convert light energy into electrical energy, and when there is a temperature difference between day and night, dew condenses on the photovoltaic panel to supply water to the storage bin, enabling the storage bin to provide concentrated brine for the electrolysis unit. The photovoltaic panel is electrically connected to the storage battery. The current continuation plate is fixedly connected to the bottom end of the photovoltaic panel. One end of the first connecting pipe communicates with the storage bin, and the other end passes through the current continuation plate and extends to the top surface of the current continuation plate;

[0012] The electrolysis unit is buried in the soil. The electrolysis unit includes an outer pipe, a pipe shaft, a fiber cloth, a second connecting pipe, and an air pipe. The pipe shaft is arranged inside the outer pipe. The fiber cloth is filled between the outer pipe and the pipe shaft. The material of the outer pipe is titanium, and the material of the pipe shaft is iron. One end port of the air pipe is near the pipe shaft, and the other end passes through the fiber cloth and the outer pipe. The air pipe is located in the upper part of the outer pipe. A number of air holes are opened in the lower part of the outer pipe. One end of the second connecting pipe is connected to the storage bin, and the other end extends into the outer pipe. The outer pipe and the pipe shaft are respectively connected to the positive and negative electrodes of the storage battery. The technology adopted is solar-assisted electrolysis technology, which can continuously repair the soil in the wild. During the repair process, no manual control and operation are required, and dew is condensed using the temperature difference between day and night as the water source, combined with sodium chloride in the storage bin to form an electrolyte.

[0013] It further includes that the storage battery is located between the photovoltaic panel and the storage bin.

[0014] To solve the problem of a large amount of rainwater entering the first connecting pipe, the photovoltaic water supply unit further includes a shielding plate and an elastic element. The shielding plate is rotatably connected to the photovoltaic panel. One end of the elastic element is connected to the photovoltaic panel, and the other end is connected to the side of the shielding plate away from the current continuation plate; a water flow groove is opened on the bottom surface of the shielding plate, and the water flow groove and the photovoltaic panel enclose a water flow port. The shielding plate is used to shield the pipe orifice of the first connecting pipe when it rains.

[0015] To solve the problem of a large amount of rainwater entering the first connecting pipe, the shielding plate is further arranged to be inclined towards the side close to the first connecting pipe.

[0016] To solve the problem of a large amount of water accumulation submerging the pipe orifice of the first connecting pipe and diluting the sodium chloride solution, the current continuation plate is further of an arc-shaped structure, and the front end or / and the rear end of the current continuation plate is / are open;

[0017] The top pipe orifice of the first connecting pipe is located above the bottom of the valley of the current continuation plate.

[0018] To solve the problem of the influence of the reaction space size on the electrolysis efficiency, the distance between the inner wall of the outer pipe and the pipe shaft is further 2 - 3 cm.

[0019] The beneficial effects of the present invention are as follows: An organic contaminated soil remediation device provided by the present invention adopts a solar-assisted electrolysis technology, which can continuously remediate field soil without manual control and operation during the remediation process. Moreover, it utilizes the condensation of dew formed by the day-night temperature difference as the water source, and combines with sodium chloride in the storage bin to form an electrolyte;

[0020] This device is small in size and light in weight, and is convenient for construction and assembly without the participation of large machinery;

[0021] This device has good remediation effects, can enable the long-term and sufficient degradation of organic substances, and is economical and efficient. It consumes the cheapest sodium chloride and does not require additional procurement of oxidants;

[0022] The chlorine gas generated during the electrolysis of the present invention can be fully used for the oxidation of organic substances, and the generated hydrogen gas can promote the decomposition of organic substances by microorganisms, improving the biodegradation efficiency and forming a combined chemical and biological treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments.

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is the present invention Figure 1 The enlarged structural diagram of part A in;

[0026] Figure 3 is the present invention Figure 2 is the schematic structural diagram in a sectional state;

[0027] Figure 4 is the present invention Figure 3 The enlarged structural diagram of part B in;

[0028] Figure 5 is the schematic structural diagram of the electrolysis unit of the present invention in a sectional state;

[0029] Figure 6 is the present invention Figure 5 The enlarged structural diagram of the upper part;

[0030] Figure 7 is the present invention Figure 5 The enlarged structural diagram of the lower part.

[0031] In the figure: 1. Storage bin, 11. Sodium chloride particles, 2. Photovoltaic water supply unit, 21. Photovoltaic panel, 22. Continuation flow plate, 23. First connecting pipe, 24. Baffle plate, 241. Water chute, 25. Elastic element, 3. Storage battery, 4. Electrolysis unit, 41. Outer pipe, 411. Air hole, 42. Pipe shaft, 43. Fiber cloth, 44. Second connecting pipe, 45. Air pipe. Detailed implementation mode

[0032] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only schematically showing the basic structure of the present invention, so they only show the components related to the present invention.

[0033] As shown in Figure 1 is a schematic structural diagram of the present invention. An organic contaminated soil remediation device includes a storage bin 1, a photovoltaic water supply unit 2, a storage battery 3, and an electrolysis unit 4;

[0034] The storage bin 1 is filled with sodium chloride particles 11;

[0035] The storage battery 3 is used to store the electric power of the photovoltaic water supply unit 2 and provide electric power for the electrolysis unit 4. The storage battery and the electrolysis unit 4 are electrically connected. The photovoltaic panel 21 realizes self-sufficiency of energy, and the storage battery 3 stores to achieve continuous operation day and night;

[0036] As shown in Figure 1 , 2 , 3, and 4, the photovoltaic water supply unit 2 includes a photovoltaic panel 21, a current continuation plate 22, and a first connecting pipe 23. The material of the current continuation plate 22 and the first connecting pipe 23 can be metal (such as copper, aluminum, steel) or glass, which can quickly transfer the internal heat to the surface and dissipate it, so that the surface temperature can be quickly reduced below the dew point to promote the condensation of water vapor. The photovoltaic panel 21 is arranged on the storage bin 1. The photovoltaic panel 21 can convert light energy into electric energy. When there is a temperature difference between day and night, dew drops condense on the photovoltaic panel 21 to supply water to the storage bin 1, so that the storage bin 1 can provide concentrated brine for the electrolysis unit 4. The photovoltaic panel 21 and the storage battery 3 are electrically connected. The current continuation plate 22 is fixedly connected to the bottom end of the photovoltaic panel 21. One end of the first connecting pipe 23 communicates with the storage bin 1, and the other end passes through the current continuation plate 22 and extends to the top surface of the current continuation plate 22;

[0037] As shown in Figure 5As shown, the electrolysis unit 4 is buried in the soil. The electrolysis unit 4 includes an outer tube 41, a tube shaft 42, a fiber cloth 43, a second connecting tube 44 and an air pipe 45. The tube shaft 42 is arranged in the outer tube 41, and the fiber cloth 43 is filled between the outer tube 41 and the tube shaft 42. The material of the outer tube 41 is titanium, and the material of the tube shaft 42 is iron. One end of the air pipe 45 is close to the tube shaft 42 (a gap is still left between the end of the air pipe 45 and the tube shaft 42, and the gap can be 0.5-2mm), and the other end passes through the fiber cloth 43 and the outer tube 41. The air pipe 45 is located on the upper part of the outer tube 41, and a plurality of air holes 411 are opened on the lower part of the outer tube 41. Hydrogen is mainly used To promote the growth of microorganisms in the surface soil, chlorine gas needs to oxidize the entire contaminated soil from top to bottom, diffuse from bottom to top, so that all organic matter can be oxidized. One end of the second connecting pipe 44 is connected to the storage bin 1, and the other end extends into the outer tube 41. The outer tube 41 and the tube axis 42 are respectively connected to the positive and negative electrodes of the battery 3. The technology used is solar-assisted electrolysis technology, which can continuously repair the soil in the field. No human control and operation are required during the repair process. The dew condensed by the temperature difference between day and night is used as a water source, and the sodium chloride in the storage bin 1 is combined to form an electrolyte. The porous outer tube 41 structure ensures the uniform diffusion of the active gas in the soil, thereby improving the uniformity of the repair.

[0038] The fiber cloth 43 is hydrophilic and can be made of asbestos. The function of the fiber cloth 43 is equivalent to the exchange membrane during the electrolysis reaction. The hydrogen generated at the tube axis 42 (cathode) is blocked by the fiber cloth 43, and the hydrogen flows out from the air pipe 45. The chlorine generated at the outer tube 41 (anode) is blocked by the fiber cloth 43, and the chlorine flows out from the air hole 411.

[0039] A gap is arranged between the fiber cloth 43 and the tube shaft 42 , and a gap is arranged between the limiting cloth 43 and the inner wall of the outer tube 41 , and the gap is used for gas flow.

[0040] A movable scraper is installed on the photovoltaic panel 21. The power source of the scraper is a screw transmission mechanism or an electric push rod. When the power source is the electric push rod, the electric push rod and the photovoltaic panel 21 are fixedly connected. The output end of the electric push rod is connected to the scraper transmission. The bottom surface of the scraper is in contact with the surface of the photovoltaic panel 21. The scraper is used to provide assistance to the flow of dew when the amount of dew produced is small and the dew cannot flow down.

[0041] The battery 3 is located between the photovoltaic panel 21 and the storage bin 1 , which optimizes the spatial layout, shortens the circuit transmission distance, reduces energy loss, and also protects the battery 3 .

[0042] like Figure 2 、 3As shown in FIGS. 4, the photovoltaic water supply unit 2 includes a shielding plate 24 and an elastic element 25. The shielding plate 24 is rotatably connected to the photovoltaic panel 21. One end of the elastic element 25 is connected to the photovoltaic panel 21, and the other end is connected to the side of the shielding plate 24 away from the freewheeling plate 22. A water flow groove 241 is formed on the bottom surface of the shielding plate 24. The water flow groove 241 and the photovoltaic panel 21 enclose a water flow port. The shielding plate 24 is used to shield the pipe orifice of the first connecting pipe 23 when it rains. The structure of the shielding plate 24 effectively prevents rainwater from diluting the electrolyte and keeps the concentration stable.

[0043] The shielding plate 24 is arranged obliquely toward the side close to the first connecting pipe 23, improving the protection effect of the shielding plate 24 on the first connecting pipe 23, preventing rainwater from directly entering the first connecting pipe 23 when it rains, enhancing the rainwater diversion effect through the inclined design of the shielding plate 24, and improving the protection reliability.

[0044] In the initial state (i.e., when there is no rain), the upper part directly above the first connecting pipe 23 is still shielded by the shielding plate 23.

[0045] When it rains, a large amount of rainwater will flow obliquely down from the photovoltaic panel 21 and stay at the shielding plate 24. Due to the pressure of the water, the shielding plate 24 rotates downward to cover the pipe orifice of the first connecting pipe 23, preventing a large amount of rainwater from pouring into the first connecting pipe 23. Especially when the rain is heavy, the shielding plate 24 can fit the plane where the pipe orifice of the first connecting pipe 23 is located and / or the top surface of the photovoltaic panel 21, so that the rainwater is blocked by the shielding plate 24 and flows away from its periphery. When the rain stops, the shielding plate 24 resets under the action of the elastic element 25. At this time, the dew can flow into the first connecting pipe 23 through the water flow groove 241. The elastic element 25 is a spring.

[0046] As Figure 2 、 3 、4 shown, the freewheeling plate 22 has an arc-shaped structure. The front end and / or the rear end of the freewheeling plate 22 is / are open. The arc-shaped freewheeling plate 22 optimizes the water flow direction. The shielding plate 24 has an arc-shaped section and a straight section. The arc-shaped section and the straight section of the shielding plate 24 are connected. The top pipe orifice of the second connecting pipe 23 is located on the straight section.

[0047] The top pipe orifice of the first connecting pipe 23 is located above the bottom of the valley of the freewheeling plate 22. There is a distance between the lowest point on the top surface of the arc-shaped freewheeling plate 22 and the top pipe orifice of the second connecting pipe 44, which can not only drain the excess water but also ensure a certain amount of dew is input into the storage bin 1.

[0048] The interval between the inner wall of the outer pipe 41 and the pipe axis 42 is 1 - 3 cm, defining the electrode spacing (1 - 3 cm) to achieve a balance between ensuring the electrolysis efficiency and reducing the internal resistance.

[0049] Working principle:

[0050] Day-night temperature difference stage: Dew forms on the surface of the photovoltaic panel 21, and the dew converges along the surface of the photovoltaic panel 21, flows through the water chute 241 on the baffle 24, enters the storage bin 1 through the first connecting pipe 23, and the dew dissolves sodium chloride to form saturated brine;

[0051] Electrolysis reaction stage: The saturated brine is transported to the electrolysis unit 4 through the second connecting pipe 44. Cl2 is precipitated on the titanium outer tube 41 (anode), and H2 is precipitated on the iron tube shaft 42 (cathode). The fiber cloth 43 keeps the electrolyte moist, and the electrode reaction continues. The pollutants are gradually degraded and mineralized. Cl2 diffuses through the pores 411 to oxidize the pollutants, gradually spreads horizontally and upward in the soil pores, and degrades the organic matter between the soils. H2 is discharged through the air pipe 45 to promote microorganisms, enters the upper soil to promote the growth of microorganisms and the degradation of organic matter by organisms, so that the upper soil can maintain biological activity;

[0052] Rainy day protection stage: Rainwater impacts the baffle 24, the baffle 24 rotates under pressure, and the baffle 24 covers the nozzle of the first connecting pipe 23 to prevent rainwater backflow. After the rain stops, the baffle 24 resets under the action of the elastic element 25.

[0053] Enlightened by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An organic contaminated soil remediation device, characterized in that, It includes a storage bin (1), a photovoltaic water supply unit (2), a storage battery (3), and an electrolysis unit (4); The storage bin (1) is filled with sodium chloride particles (11); The storage battery (3) is used to store the electricity of the photovoltaic water supply unit (2) and supply electricity to the electrolysis unit (4), and the storage battery and the electrolysis unit (4) are electrically connected; The photovoltaic water supply unit (2) includes a photovoltaic panel (21), a current continuation plate (22), and a first connecting pipe (23). The photovoltaic panel (21) is arranged on the storage bin (1). The photovoltaic panel (21) can convert light energy into electrical energy. When there is a temperature difference between day and night, dew condenses on the photovoltaic panel (21) to supply water to the storage bin (1), so that the storage bin (1) can supply concentrated brine to the electrolysis unit (4). The photovoltaic panel (21) and the storage battery (3) are electrically connected. The current continuation plate (22) is fixedly connected to the bottom end of the photovoltaic panel (21). One end of the first connecting pipe (23) communicates with the storage bin (1), and the other end passes through the current continuation plate (22) and extends to the top surface of the current continuation plate (22); The electrolysis unit (4) is buried in the soil. The electrolysis unit (4) includes an outer pipe (41), a pipe shaft (42), a fiber cloth (43), a second connecting pipe (44), and an air pipe (45). The pipe shaft (42) is arranged inside the outer pipe (41). The fiber cloth (43) is filled between the outer pipe (41) and the pipe shaft (42). The material of the outer pipe (41) is titanium, and the material of the pipe shaft (42) is iron. One end port of the air pipe (45) is near the pipe shaft (42), and the other end passes through the fiber cloth (43) and the outer pipe (41). The air pipe (45) is located in the upper part of the outer pipe (41). A plurality of air holes (411) are opened in the lower part of the outer pipe (41). One end of the second connecting pipe (44) is connected to the storage bin (1), and the other end extends into the outer pipe (41). The outer pipe (41) and the pipe shaft (42) are respectively connected to the positive and negative poles of the storage battery (3).

2. The organic contaminated soil remediation device according to claim 1, characterized in that: The storage battery (3) is located between the photovoltaic panel (21) and the storage bin (1).

3. The organic contaminated soil remediation device according to claim 1, characterized in that: The photovoltaic water supply unit (2) includes a shielding plate (24) and an elastic element (25). The shielding plate (24) is rotatably connected to the photovoltaic panel (21). One end of the elastic element (25) is connected to the photovoltaic panel (21), and the other end is connected to the side of the shielding plate (24) away from the current continuation plate (22). A water flow groove (241) is opened on the bottom surface of the shielding plate (24). The water flow groove (241) and the photovoltaic panel (21) enclose a water flow port. The shielding plate (24) is used to shield the pipe orifice of the first connecting pipe (23) when it rains.

4. An organic contaminated soil remediation device according to claim 3, characterized in that: The shielding plate (24) is arranged to be inclined towards the side close to the first connecting pipe (23).

5. An organic contaminated soil remediation device as claimed in claim 1, wherein: The current continuation plate (22) has an arc-shaped structure, and the front end or / and the rear end of the current continuation plate (22) is / are open; The top pipe orifice of the first connecting pipe (23) is located above the bottom of the valley of the current continuation plate (22).

6. The organic contaminated soil remediation device according to claim 1, characterized in that: The interval between the inner wall of the outer pipe (41) and the pipe shaft (42) is 2-3 cm.

Images