A chemical remediation system for contaminated soil

Abstract

This invention provides a chemical remediation system for contaminated soil, belonging to the technical field of soil remediation. It includes a storage trough, the interior of which is a soil remediation area. A frame is positioned at the center of the storage trough, and a chemical cartridge is housed within the frame. A lower rotating frame and an upper rotating frame are coaxially rotatably connected to the frame. A spray pipe is radially arranged along the storage trough on the outer side of the lower rotating frame, and a spraying component is mounted on the lower rotating frame to draw the chemical from the cartridge into the spray pipe. A soil storage cylinder is positioned above the upper rotating frame, and a spreading pipe is radially arranged along the storage trough on the outer side of the upper rotating frame. A conveying component is mounted on the upper rotating frame to transport soil from the storage cylinder to the spreading pipe. A drive mechanism is provided on the frame to rotate either the upper or lower rotating frame independently. This invention enables the application of a layer of chemical agent after each layer of soil is laid, significantly improving the mixing uniformity between contaminated soil and chemical agents while spreading large quantities of soil. Furthermore, it eliminates the need for sieving and stirring devices, ultimately improving the efficiency and effectiveness of soil remediation.

Description

Technical Field

[0001] This invention belongs to the technical field of soil remediation, and more specifically, relates to a chemical remediation system for contaminated soil. Background Technology

[0002] With the continuous acceleration of industrialization, the unreasonable mining and smelting emissions of mineral resources, long-term irrigation of soil with sewage and application of sludge, atmospheric deposition caused by human activities, and the application of chemical fertilizers and pesticides have resulted in serious soil pollution.

[0003] Soil remediation refers to technical measures to restore contaminated soil to its normal function. Commonly used soil remediation technologies include physical, chemical, and biological methods. Chemical remediation involves introducing soil conditioners to reduce the bioavailability of heavy metals through adsorption, oxidation-reduction, antagonism, or precipitation.

[0004] The existing Chinese patent with publication number CN102974608A discloses a chemical enhancement remediation method for organic polluted soil, which includes four stages: (1) centralized storage and transportation of polluted soil; (2) chemical enhancement treatment process; (3) pollution exhaust gas treatment process; and (4) soil acceptance and transfer process. In the chemical enhancement treatment process, soil turning and screening equipment is used to mix and react polluted soil with chemical amendment agents.

[0005] Most of the aforementioned patents and other existing technologies employ soil turning or mixing equipment to mix contaminated soil with chemical amendments. If soil turning equipment is used, it is easy to cause uneven mixing between contaminated soil and chemical amendments, resulting in poor soil remediation effect. If mixing equipment is used, only a small amount of soil can be remediated at a time, resulting in low soil remediation efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a chemical remediation system for contaminated soil, in order to solve the technical problems in the prior art where using soil turning equipment easily leads to uneven mixing between contaminated soil and chemical amendments, resulting in poor soil remediation effect; and using mixing equipment, which can only remediate a small amount of soil at a time, resulting in low soil remediation efficiency.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A chemical remediation system for contaminated soil is provided, comprising a storage trough, the interior of which is a soil remediation area. A frame is positioned at the center of the storage trough, and a reagent cylinder is disposed within the frame. A lower rotating frame and an upper rotating frame are coaxially rotatably connected to the frame. A spraying pipe is disposed on the outer side of the lower rotating frame, arranged radially along the storage trough. A spraying assembly is disposed on the lower rotating frame for drawing the reagent from the reagent cylinder into the spraying pipe. A soil storage cylinder is disposed above the upper rotating frame. A spreading pipe is disposed on the outer side of the upper rotating frame, arranged radially along the storage trough. A conveying assembly is disposed on the upper rotating frame for conveying soil from the soil storage cylinder to the spreading pipe. A drive mechanism is disposed on the frame for driving the upper rotating frame or the lower rotating frame to rotate independently.

[0008] In one possible implementation, based on the above technical solutions, the spraying assembly includes a pump body, a delivery pipe, and a counterweight. The pump body is mounted on the lower rotating frame and connected to the spraying pipe. One end of the delivery pipe is connected to the pump body, and the other end of the delivery pipe is located inside the agent cylinder. The counterweight is connected to the bottom end of the delivery pipe, and the delivery pipe is a flexible hose.

[0009] In one possible implementation, based on the above technical solutions, the conveying assembly includes a conveying shaft, a spiral blade, and a conveying motor. The conveying shaft is coaxially rotatably connected inside the spreading pipe, and one end of the conveying shaft extends into the soil storage cylinder. A row of discharge holes is provided at the bottom of the spreading pipe. The spiral blade is fixed on the conveying shaft and is located simultaneously inside the soil storage cylinder and the spreading pipe. The conveying motor is mounted on the upper rotating frame, and the output shaft of the conveying motor is coaxially fixed with the conveying shaft.

[0010] In one possible implementation, based on the above technical solutions, the soil storage cylinder includes a fixed cylinder and a rotating cylinder. The rotating cylinder is rotatably connected to the bottom of the fixed cylinder, and the conveying shaft and the spiral blades are located inside the rotating cylinder. A connecting frame is provided at the top of the fixed cylinder, and the top of the connecting frame is connected to the roof steel structure or an external fixed structure.

[0011] In one possible implementation, based on the above technical solutions, the drive mechanism includes a drive motor, a drive shaft, an internal gear disk, gears, and a connection switching assembly. The drive motor is vertically mounted in the frame, and the drive shaft is rotatably connected to the frame and coaxially fixed to the output shaft of the drive motor. There are two internal gear disks, each coaxially fixed to the upper rotating frame or the lower rotating frame. There are two gears, each coaxially rotatably connected to the drive shaft, and the two gears mesh with the internal gear disks one-to-one. The connection switching assembly is used to fix each of the two gears separately to the drive shaft.

[0012] In one possible implementation, based on the above technical solutions, the connection switching assembly includes a switching rod and connecting blocks. A lifting groove is coaxially formed on the top of the drive shaft. The switching rod is slidably disposed within the lifting groove. Two sets of connecting blocks are fixed vertically to the switching rod. A connecting groove is provided within the drive shaft for the connecting blocks to move up and down. Each gear has a vertically arranged vertical groove and an annular groove on its inner circumference, with the vertical and annular grooves on the two gears having opposite vertical distribution directions. Each set of connecting blocks slides between the corresponding vertical groove and the annular groove. When one set of connecting blocks is located in the corresponding vertical groove, the other set of connecting blocks is located in the annular groove. A lifting assembly is provided within the frame, which drives the two sets of connecting blocks to slide and switch between the corresponding vertical groove and the annular groove.

[0013] In one possible implementation, based on the above technical solutions, the lifting assembly includes a stud, a sleeve, a guide, and a drive. The stud is coaxially rotatably connected to the top of the switching rod, the sleeve is threadedly connected to the stud, the guide is disposed within the frame and provides vertical guidance and limitation for the stud, the sleeve is rotatably connected to the guide, and the drive is disposed within the frame and used to drive the sleeve to rotate.

[0014] In one possible implementation, based on the above technical solutions, the guide component includes a guide plate and a guide block. The guide plate is fixed inside the frame, the stud passes through the guide plate, and a guide groove is formed on the outer circumferential surface of the stud along its axial direction. The guide block is fixed inside the guide plate and located inside the guide groove, and the threaded sleeve is rotatably connected to the guide plate.

[0015] In one possible implementation, based on the above technical solutions, the driving component includes a drive motor, sprockets, and a chain. The drive motor is vertically mounted in the frame. There are two sprockets, which are coaxially fixed to the output shaft of the drive motor and the screw sleeve, respectively. The chain is sleeved and engaged with the two sprockets.

[0016] In one possible implementation, based on the above technical solutions, two support ring grooves are formed on the inner circumferential surface of the storage trough, and the outer ends of the spraying pipe and the spreading pipe are slidably disposed in the support ring grooves.

[0017] The beneficial effects of the chemical remediation system for contaminated soil provided by this invention are as follows: Compared with the prior art, this invention pours chemical agents into a reagent cylinder and pulverized contaminated soil into a soil storage cylinder. First, the soil is pumped into a spreading pipe via a conveying component, while a drive mechanism rotates the upper rotating frame to spread the first layer of soil in the storage trough. Then, a spraying component pumps chemical agents into a spraying pipe, while a drive mechanism rotates the lower rotating frame to spray the chemical agents onto the first layer of soil. The above steps are repeated, with the upper and lower rotating frames reversing. Through the sequential reciprocating rotation of the spreading and spraying pipes, a layer of chemical agent is sprayed after each layer of soil is laid. Each storage trough can hold a large amount of soil, significantly improving the mixing uniformity between the contaminated soil and the chemical agents. Furthermore, no sieving or stirring devices are required, ultimately improving the efficiency and effectiveness of soil remediation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a chemical remediation system for contaminated soil provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the upper and lower rotating frames provided in an embodiment of the present invention;

[0021] Figure 3 A partial cross-sectional view of the spraying assembly, conveying assembly, and driving mechanism provided in an embodiment of the present invention;

[0022] Figure 4 A partial cross-sectional view of the drive mechanism provided in an embodiment of the present invention;

[0023] Figure 5 A partial cross-sectional view of the connection switching component and the lifting component provided in an embodiment of the present invention;

[0024] Figure 6 A partial cross-sectional view of the connection switching component, vertical groove, and annular groove provided in an embodiment of the present invention;

[0025] Figure 7 A partial cross-sectional view of the guide component provided in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of a chemical remediation system for contaminated soil provided in another embodiment of the present invention.

[0027] The labels for the attached figures are as follows:

[0028] 1. Storage trough; 11. Support ring groove; 12. Side opening; 2. Frame; 21. Chemical cylinder; 22. Lower rotating frame; 23. Upper rotating frame; 24. Soil storage cylinder; 241. Fixed cylinder; 242. Rotating cylinder; 243. Connecting frame; 3. Spraying pipe; 4. Spraying assembly; 41. Pump body; 42. Pumping pipe; 43. Counterweight; 5. Spreading pipe; 51. Discharge hole; 6. Conveying assembly; 61. Conveying shaft; 62. Spiral blade; 63. Conveying motor; 7. Drive mechanism; 71. Drive 72. Drive motor; 721. Lifting groove; 722. Connecting groove; 73. Internal gear plate; 74. Gear; 741. Vertical groove; 742. Annular groove; 75. Connecting switching assembly; 751. Switching rod; 752. Connecting block; 8. Lifting assembly; 81. Stud; 811. Guide groove; 82. Screw sleeve; 83. Guide component; 831. Guide plate; 832. Guide block; 84. Drive component; 841. Transmission motor; 842. Sprocket; 843. Chain; 9. Spiral auger. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of this application, not all of them. The specific embodiments described herein are only used to explain the invention and are not intended to limit the invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should be further noted that the accompanying drawings and embodiments of the present invention mainly describe the concept of the present invention. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of the present invention, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0031] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0033] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] The present invention will now describe a chemical remediation system for contaminated soil.

[0035] like Figures 1 to 3 As shown, one embodiment of the present invention provides a chemical remediation system for contaminated soil, including a storage trough 1, the interior of which is a soil remediation area. A frame 2 is located in the center of the storage trough 1, and a reagent cylinder 21 is located inside the frame 2. A lower rotating frame 22 and an upper rotating frame 23 are coaxially rotatably connected to the frame 2. A spray pipe 3 is arranged radially along the storage trough 1 on the outer side of the lower rotating frame 22, and a spraying component 4 is provided on the lower rotating frame 22 for drawing the reagent from the reagent cylinder 21 into the spray pipe 3. A soil storage cylinder 24 is located above the upper rotating frame 23, and a spreading pipe 5 is arranged radially along the storage trough 1 on the outer side of the upper rotating frame 23. A conveying component 6 is provided on the upper rotating frame 23 for conveying the soil in the soil storage cylinder 24 into the spreading pipe 5. A drive mechanism 7 is provided on the frame 2 for driving the upper rotating frame 23 or the lower rotating frame 22 to rotate independently.

[0036] This embodiment provides a chemical remediation system for contaminated soil. Compared with existing technologies, this system involves pouring chemical agents into a reagent cylinder 21 and crushed contaminated soil into a soil storage cylinder 24. The soil is first pumped into a spreading pipe 5 via a conveying component 6, while a drive mechanism 7 rotates an upper rotating frame 23 to spread the first layer of soil in the storage trough 1. Then, a spraying component 4 pumps chemical agents into a spraying pipe 3, while the drive mechanism 7 rotates a lower rotating frame 22 to spray the first layer of soil. The above steps are repeated, with the upper and lower rotating frames 23 and 22 rotating in opposite directions. Through the sequential reciprocating rotation of the spreading pipe 5 and spraying pipe 3, a layer of chemical agent is sprayed after each layer of soil is laid. Each storage trough 1 can hold a large amount of soil, significantly improving the mixing uniformity between the contaminated soil and the chemical agents. Furthermore, it eliminates the need for sieving and stirring devices, ultimately improving the efficiency and effectiveness of soil remediation.

[0037] like Figure 3 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0038] The spraying assembly 4 includes a pump body 41, a delivery pipe 42, and a counterweight 43. The pump body 41 is mounted on the lower rotating frame 22 and connected to the spraying pipe 3. One end of the delivery pipe 42 is connected to the pump body 41, and the other end of the delivery pipe 42 is located inside the agent cylinder 21. The counterweight 43 is connected to the bottom end of the delivery pipe 42. The delivery pipe 42 is a flexible hose.

[0039] When chemical spraying is required, the pump body 41 is started to send the chemical agent through the pumping pipe 42 into the spraying pipe 3 and spray it out from each nozzle on the spraying pipe 3. When the pump body 41 rotates with the lower rotating frame 22, the pumping pipe 42 and the counterweight 43 rotate with it in the agent cylinder 21. The counterweight 43 can keep the end of the pumping pipe 42 at the bottom of the agent cylinder 21, which improves the stability of the agent pumping.

[0040] like Figures 2 to 3 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0041] The conveying assembly 6 includes a conveying shaft 61, a spiral blade 62, and a conveying motor 63. The conveying shaft 61 is coaxially rotatably connected inside the spreading pipe 5, and one end of the conveying shaft 61 extends into the soil storage cylinder 24. A row of discharge holes 51 is provided at the bottom of the spreading pipe 5. The spiral blade 62 is fixed on the conveying shaft 61 and is located in both the soil storage cylinder 24 and the spreading pipe 5. The conveying motor 63 is mounted on the upper rotating frame 23, and the output shaft of the conveying motor 63 is coaxially fixed with the conveying shaft 61.

[0042] When it is necessary to spread contaminated soil, the conveying motor 63 is started to make the conveying pipe and the spiral blade 62 rotate. The spiral blade 62 transports the soil in the soil storage cylinder 24 to the spreading pipe 5 and discharges it through the discharge hole 51 at the bottom of the spreading pipe 5, thereby improving the soil conveying efficiency.

[0043] Furthermore, since the soil is transported from the inside to the outside of the storage trough 1 within the spreading pipe 5, in order to improve the uniformity of soil spreading, the diameter of the discharge hole 51 can be gradually increased from the inside to the outside of the storage trough 1.

[0044] like Figure 1 and Figure 3 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0045] The soil storage cylinder 24 includes a fixed cylinder 241 and a rotating cylinder 242. The rotating cylinder 242 is rotatably connected to the bottom of the fixed cylinder 241. The conveying shaft 61 and the spiral blade 62 are located inside the rotating cylinder 242. A connecting frame 243 is provided on the top of the fixed cylinder 241. The top of the connecting frame 243 is connected to the roof steel structure or an external fixed structure.

[0046] When the drive mechanism 7 drives the upper rotating frame 23 to rotate, the conveying component 6 and the rotating cylinder 242 rotate with the upper rotating frame 23, while the angle of the fixed cylinder 241 remains unchanged. This reduces the workload of the drive mechanism 7 and also achieves the soil clearing effect inside the soil storage cylinder 24. While the conveying component 6 is conveying soil, the fixed cylinder 241 and the rotating cylinder 242 rotate relative to each other. After the soil in the rotating cylinder 242 is conveyed into the spreading pipe 5, the soil in the fixed cylinder 241 can fall into the rotating cylinder 242 in time, which can minimize the phenomenon of soil suspension in the soil storage cylinder 24 and improve the soil conveying effect.

[0047] like Figures 3 to 4 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0048] The drive mechanism 7 includes a drive motor 71, a drive shaft 72, an internal gear disk 73, gears 74, and a connection switching assembly 75. The drive motor 71 is vertically mounted inside the frame 2. The drive shaft 72 is rotatably connected inside the frame 2 and coaxially fixed with the output shaft of the drive motor 71. There are two internal gear disks 73, which are coaxially fixed on the upper rotating frame 23 or the lower rotating frame 22, respectively. There are two gears 74, which are coaxially rotatably connected to the drive shaft 72. The two gears 74 mesh with the internal gear disks 73 one-to-one. The connection switching assembly 75 is used to fix the two gears 74 separately to the drive shaft 72.

[0049] When soil spreading or pesticide spraying is required, the connecting switching component 75 rotates either the upper rotating frame 23 or the lower rotating frame 22 as needed to fix the corresponding gear 74 relative to the drive shaft 72. The other gear 74 remains in a rotating connection with the drive shaft 72. The drive motor 71 is started to make the drive shaft 72 rotate. The drive shaft 72 drives the upper rotating frame 23 or the lower rotating frame 22 to rotate through the corresponding gear 74 and the internal gear disk 73, which improves the individual rotation effect of the upper rotating frame 23 or the lower rotating frame 22.

[0050] like Figures 5 to 6 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0051] The connection switching assembly 75 includes a switching rod 751 and a connecting block 752. A lifting groove 721 is coaxially provided on the top of the drive shaft 72. The switching rod 751 is slidably disposed in the lifting groove 721. There are two sets of connecting blocks 752, which are fixed vertically on the switching rod 751. The drive shaft 72 is provided with a connecting groove 722 for the connecting blocks 752 to move up and down. Each gear 74 has a vertical groove 741 and an annular groove 742 arranged vertically on its inner circumference. The vertical grooves 741 and annular grooves 742 on the two gears 74 are distributed in opposite directions. Each set of connecting blocks 752 slides between the corresponding vertical groove 741 and annular groove 742. When one set of connecting blocks 752 is located in the corresponding vertical groove 741, the other set of connecting blocks 752 is located in the annular groove 742. A lifting assembly 8 is provided in the frame 2. The lifting assembly 8 is used to drive the two sets of connecting blocks 752 to slide and switch between the corresponding vertical groove 741 and annular groove 742.

[0052] The lifting assembly 8 includes a stud 81, a sleeve 82, a guide 83, and a drive 84. The stud 81 is coaxially rotatably connected to the top of the switching rod 751. The sleeve 82 is threadedly connected to the stud 81. The guide 83 is set inside the frame 2 and provides vertical guidance and limit for the stud 81. The sleeve 82 is rotatably connected to the guide 83. The drive 84 is set inside the frame 2 and is used to drive the sleeve 82 to rotate.

[0053] When the upper connecting block 752 is located in the vertical groove 741 of the upper gear 74, the lower connecting block 752 is located in the annular groove 742 of the lower gear 74. At this time, when the drive shaft 72 rotates, it drives the upper gear 74 to rotate, thereby realizing the rotation of the upper rotating frame 23.

[0054] When switching between the upper rotating frame 23 and the lower rotating frame 22, the driving component 84 drives the screw sleeve 82 to rotate. Through the setting of the guide component 83, the rotation of the screw sleeve 82 causes the stud 81 to rise and fall. The stud 81 drives the switching rod 751 to rise and fall, which realizes the movement of the connecting block 752 between the vertical groove 741 and the annular groove 742, ultimately improving the rotation switching efficiency between the upper rotating frame 23 and the lower rotating frame 22.

[0055] like Figure 5 and Figure 7 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0056] The guide component 83 includes a guide plate 831 and a guide block 832. The guide plate 831 is fixed inside the frame 2. The stud 81 passes through the guide plate 831. The outer circumferential surface of the stud 81 is provided with a guide groove 811 along its axial direction. The guide block 832 is fixed inside the guide plate 831 and located inside the guide groove 811. The screw sleeve 82 is rotatably connected to the guide plate 831.

[0057] When the drive component 84 drives the screw sleeve 82 to rotate, the stud 81 moves up and down within the guide plate 831. At this time, relative sliding occurs between the guide block 832 and the guide groove 811, which improves the stability of the stud 81's movement.

[0058] like Figure 5 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0059] The drive unit 84 includes a drive motor 841, sprockets 842 and chain 843. The drive motor 841 is vertically arranged inside the frame 2. There are two sprockets 842, which are coaxially fixed on the output shaft of the drive motor 841 and the screw sleeve 82 respectively. The chain 843 is sleeved and engaged on the two sprockets 842.

[0060] When switching between the upper rotating frame 23 and the lower rotating frame 22, starting the drive motor 841 can drive the screw sleeve 82 to rotate through the sprocket 842 and chain 843, which improves the rotation efficiency of the screw sleeve 82. Furthermore, since the space between the top of the drive shaft 72 and the top of the frame 2 is limited, the drive source can be installed on the side of the drive shaft 72 through the transmission method of the sprocket 842 and chain 843 to make room for the lifting space of the stud 81, which improves the overall ease of disassembly and reassembly of the connecting switching component 75 and the drive component 84.

[0061] like Figure 1 As shown, based on the above embodiments, the present invention provides another specific embodiment as follows:

[0062] Two support ring grooves 11 are provided on the inner circumferential surface of the storage trough 1, and the outer ends of the spray pipe 3 and the spreading pipe 5 are slidably disposed in the support ring grooves 11.

[0063] Furthermore, sliding seats can be provided at the outer ends of the spray pipe 3 and the spreading pipe 5, so that the two and the inner wall of the corresponding support ring groove 11 are rubbed by balls or rollers. This not only supports the spray pipe 3 and the spreading pipe 5, but also reduces the friction of the spray pipe 3 and the spreading pipe 5 in the support ring groove 11, so as to further reduce the workload of the drive mechanism 7.

[0064] In some possible embodiments, side openings 12 can be opened on both sides of the storage trough 1, and a spiral auger 9 can be set directly below the side openings 12. The feed inlet of the spiral auger 9 is connected to the side openings 12, which can facilitate the discharge of the soil after the repair in the storage trough 1 and improve the discharge efficiency.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0066] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0067] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

Claims

1. A chemical remediation system for contaminated soil, characterized in that, The system includes a storage trough (1), the interior of which is a soil remediation area. A frame (2) is located in the center of the storage trough (1), and a chemical cylinder (21) is located inside the frame (2). A lower rotating frame (22) and an upper rotating frame (23) are coaxially rotatably connected on the frame (2). A spray pipe (3) is arranged radially along the storage trough (1) on the outer side of the lower rotating frame (22). The lower rotating frame (22) is equipped with a device for drawing the chemical from the chemical cylinder (21) into the storage trough. The spraying assembly (4) is inside the spraying pipe (3); a soil storage cylinder (24) is provided above the upper rotating frame (23); a spreading pipe (5) is provided on the outside of the upper rotating frame (23) along the radial direction of the storage trough (1); a conveying assembly (6) is provided on the upper rotating frame (23) for conveying the soil in the soil storage cylinder (24) to the spreading pipe (5); a drive mechanism (7) is provided on the frame body (2) for driving the upper rotating frame (23) or the lower rotating frame (22) to rotate independently. The conveying assembly (6) includes a conveying shaft (61), a spiral blade (62), and a conveying motor (63). The conveying shaft (61) is coaxially rotatably connected inside the spreading pipe (5), and one end of the conveying shaft (61) extends into the soil storage cylinder (24). A row of discharge holes (51) is provided at the bottom of the spreading pipe (5). The spiral blade (62) is fixed on the conveying shaft (61) and is located in both the soil storage cylinder (24) and the spreading pipe (5). The conveying motor (63) is mounted on the upper rotating frame (23), and the output shaft of the conveying motor (63) is coaxially fixed with the conveying shaft (61). The drive mechanism (7) includes a drive motor (71), a drive shaft (72), an internal gear disk (73), gears (74), and a connection switching assembly (75). The drive motor (71) is vertically arranged inside the frame (2). The drive shaft (72) is rotatably connected inside the frame (2) and coaxially fixed with the output shaft of the drive motor (71). There are two internal gear disks (73), which are coaxially fixed on the upper rotating frame (23) or the lower rotating frame (22), respectively. There are two gears (74), which are coaxially rotatably connected to the drive shaft (72). The two gears (74) mesh with the internal gear disks (73) one-to-one. The connection switching assembly (75) is used to fix the two gears (74) separately to the drive shaft (72). The connection switching assembly (75) includes a switching rod (751) and a connecting block (752). A lifting groove (721) is coaxially formed on the top of the drive shaft (72). The switching rod (751) is slidably disposed within the lifting groove (721). Two sets of connecting blocks (752) are fixed vertically to the switching rod (751). The drive shaft (72) has a connecting groove (722) for the connecting blocks (752) to move vertically within it. Each gear (74) has a vertically arranged vertical groove (741) and an annular groove (742) on its inner circumferential surface. The two gears... The vertical groove (741) and the annular groove (742) on (74) are distributed in opposite directions; each set of connecting blocks (752) slides between the corresponding vertical groove (741) and the annular groove (742), and when one set of connecting blocks (752) is located in the corresponding vertical groove (741), the other set of connecting blocks (752) is located in the annular groove (742); a lifting assembly (8) is provided in the frame (2), and the lifting assembly (8) is used to drive the two sets of connecting blocks (752) to slide and switch between the corresponding vertical groove (741) and the annular groove (742); Two support ring grooves (11) are provided on the inner circumferential surface of the storage trough (1), and the outer ends of the spray pipe (3) and the spreading pipe (5) are slidably disposed in the support ring grooves (11).

2. The chemical remediation system for contaminated soil as described in claim 1, characterized in that, The spraying assembly (4) includes a pump body (41), a pumping pipe (42), and a counterweight (43). The pump body (41) is mounted on the lower rotating frame (22) and connected to the spraying pipe (3). One end of the pumping pipe (42) is connected to the pump body (41), and the other end of the pumping pipe (42) is located inside the agent cylinder (21). The counterweight (43) is connected to the bottom end of the pumping pipe (42), and the pumping pipe (42) is a flexible hose.

3. The chemical remediation system for contaminated soil as described in claim 1, characterized in that, The soil storage cylinder (24) includes a fixed cylinder (241) and a rotating cylinder (242). The rotating cylinder (242) is rotatably connected to the bottom of the fixed cylinder (241). The conveying shaft (61) and the spiral blade (62) are located inside the rotating cylinder (242). A connecting frame (243) is provided on the top of the fixed cylinder (241). The top of the connecting frame (243) is connected to the roof steel structure or external fixed structure.

4. The chemical remediation system for contaminated soil as described in claim 1, characterized in that, The lifting assembly (8) includes a stud (81), a sleeve (82), a guide (83), and a drive (84). The stud (81) is coaxially rotatably connected to the top of the switching rod (751). The sleeve (82) is threadedly connected to the stud (81). The guide (83) is disposed in the frame (2) and provides vertical guidance and limit for the stud (81). The sleeve (82) is rotatably connected to the guide (83). The drive (84) is disposed in the frame (2) and is used to drive the sleeve (82) to rotate.

5. The chemical remediation system for contaminated soil as described in claim 4, characterized in that, The guide component (83) includes a guide plate (831) and a guide block (832). The guide plate (831) is fixed inside the frame (2). The stud (81) passes through the guide plate (831). The outer circumferential surface of the stud (81) is provided with a guide groove (811) along its axial direction. The guide block (832) is fixed inside the guide plate (831) and located inside the guide groove (811). The threaded sleeve (82) is rotatably connected to the guide plate (831).

6. The chemical remediation system for contaminated soil as described in claim 4, characterized in that, The drive unit (84) includes a drive motor (841), sprockets (842) and chain (843). The drive motor (841) is vertically arranged inside the frame (2). There are two sprockets (842) and they are coaxially fixed on the output shaft of the drive motor (841) and the screw sleeve (82) respectively. The chain (843) is sleeved and engaged on the two sprockets (842).

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