A skid-mounted integrated contaminated soil remediation pilot plant

Abstract

This utility model discloses a skid-mounted integrated pilot-scale equipment for contaminated soil remediation, relating to the field of contaminated soil remediation technology. It includes a mixing drum with its axis horizontally aligned for mixing soil and reagents. A feed hopper is located at the top of the mixing drum. A stirring shaft is coaxially mounted inside the mixing drum, with both ends rotatably connected to the two ends of the mixing drum. A drive mechanism is located on one side of the mixing drum to drive the stirring shaft to rotate. A double-ended helical ribbon is mounted on the stirring shaft. A connecting pipe is inserted into the top of the mixing drum. A nozzle is located on the top of the inner wall of the mixing drum, and the connecting pipe communicates with the nozzle. A discharge port is located at the bottom of the mixing drum, and a baffle is detachably connected to the discharge port. A support frame is located at the bottom of the mixing drum to support it. A discharge hopper is located at the bottom of the mixing drum, below the discharge port.

Description

Technical Field

[0001] This utility model relates to the field of contaminated soil remediation technology, specifically to a skid-mounted integrated pilot-scale equipment for contaminated soil remediation. Background Technology

[0002] Currently, the main technologies for remediating contaminated soil include solidification and stabilization technology, leaching technology, thermal desorption technology, phytoremediation technology, and microbial remediation technology. Among them, solidification and stabilization technology is a low-cost, high-efficiency, short-time, and widely applicable technology.

[0003] Before a project to solidify and stabilize contaminated soil is undertaken, it is necessary to clarify the type, scope, and degree of pollution. Then, a treatment plan is determined through small-scale and pilot-scale tests. Small-scale tests are usually small in scale and concentrated in the laboratory stage, while pilot-scale tests require a certain treatment scale and must cover typical contaminated areas of the actual site. Currently, pilot-scale equipment that can be directly used for solidification and stabilization treatment has limited functionality. Utility Model Content

[0004] Therefore, this utility model provides a skid-mounted integrated pilot-scale equipment for contaminated soil remediation to solve the problems existing in the above-mentioned technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A skid-mounted integrated pilot-scale equipment for contaminated soil remediation includes:

[0007] A mixing drum, with its axis horizontally aligned, is used to mix soil and chemicals. A feed hopper is located at the top of the mixing drum. A stirring shaft is coaxially mounted inside the mixing drum, with both ends of the stirring shaft rotatably connected to both ends of the mixing drum. A drive mechanism is located on one side of the mixing drum to drive the stirring shaft to rotate. A double-ended helical ribbon is mounted on the stirring shaft. A connecting pipe is inserted into the top of the mixing drum. A nozzle is located at the top of the inner wall of the mixing drum, and the connecting pipe communicates with the nozzle. A discharge port is located at the bottom of the mixing drum, and a baffle is detachably connected to the discharge port.

[0008] A support bracket is disposed at the bottom of the mixing cylinder to support the mixing cylinder;

[0009] The bottom of the mixing cylinder is provided with a discharge hopper, which is located below the discharge port.

[0010] Optionally, the bracket includes a support plate and support legs at the bottom corners of the support plate. The support legs are fixedly connected to the support plate. A placement groove is provided on the top of the support plate, and the mixing cylinder is snapped and fixed in the placement groove. The part of the top of the support plate without the placement groove forms a placement platform for placing measuring experimental equipment and instruments.

[0011] Optionally, the system also includes a control system, which includes a control cabinet containing a control main board. The mixing drum contains a temperature probe for detecting soil temperature and a probe for detecting soil moisture. Both the temperature probe and the moisture probe are electrically connected to the control main board, which is electrically connected to the nozzle and the drive mechanism.

[0012] Optionally, the drive mechanism includes a motor reducer, which is fixedly connected to one end of the mixing drum. The output shaft of the motor reducer is coaxially and fixedly connected to one end of the stirring shaft via a coupling. The other end of the stirring shaft is rotatably connected to the end cover of the mixing drum via a bearing assembly.

[0013] Optionally, two slots are fixedly connected to the bottom of the outer wall of the mixing cylinder on both sides of the discharge port. The slots are L-shaped, with the vertical parts of the two slots fixedly connected to the mixing cylinder and the horizontal parts of the two slots facing each other. A baffle is slidably connected between the horizontal part and the mixing cylinder to seal the discharge port.

[0014] Optionally, the temperature probe and humidity probe are detachably connected to the mixing cylinder;

[0015] The inner wall of the mixing cylinder is provided with an internal threaded sleeve, and the temperature probe and humidity probe are threaded into the internal threaded sleeve.

[0016] Optionally, the bottom of the support leg and the bottom of the discharge hopper are both provided with caster wheel assemblies.

[0017] Optionally, the nozzle and the connecting pipe are connected by a connector. The connector has a convex structure, with its middle part extending through the axial direction. The connector is inserted through the side wall of the mixing cylinder. The small-diameter end of the connector is used to connect to the connecting pipe, and the inner wall of the large-diameter end of the connector is provided with an internal thread for threaded connection to the nozzle.

[0018] This utility model has at least the following beneficial effects:

[0019] This invention integrates metered soil and reagents into a mixing drum via a feed hopper. A drive mechanism rotates the stirring shaft and double-headed screw ribbon, ensuring thorough mixing of the reagents and soil within the mixing drum. Tap water is sprayed through a connecting pipe and atomizing nozzles to adjust the soil moisture content. Temperature and humidity probes detect the soil moisture content and control the water spray volume. After mixing, a baffle is pulled out, and the mixed soil enters the discharge hopper. The treated soil is then cured and tested. This integrated system combines mixing, metering, and humidity control functions, improving the processing efficiency of pilot-scale equipment. Attached Figure Description

[0020] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0022] Figure 1 This is a first-view structural diagram of an embodiment of the present invention;

[0023] Figure 2 This is a second-view structural schematic diagram of an embodiment of the present invention;

[0024] Figure 3 This is a third-view structural diagram of an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of a connector according to an embodiment of the present invention;

[0026] Figure 5 for Figure 2 Enlarged structural diagram of section A.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Mixing drum; 2. Feed hopper; 3. Stirring shaft; 4. Drive mechanism; 41. Motor reducer; 42. Coupling; 5. Double-ended threaded ribbon; 6. Connecting pipe; 7. Nozzle; 8. Baffle; 9. Bracket; 10. Control cabinet; 11. Probe; 12. Discharge hopper; 13. End cover; 14. Slot; 15. Internal threaded sleeve; 16. Universal wheel assembly; 17. Connecting parts. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," "fourth," etc. (if present), in the specification, claims, and accompanying drawings of this utility model are intended to distinguish the objects they refer to. For solutions with a sequential flow, this terminology need not be interpreted as describing a specific order or sequence; for solutions with device structures, this terminology does not distinguish between matters of importance or positional relationships.

[0031] Furthermore, the terms “comprising,” “having,” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may also include other steps or units that are not expressly listed but are inherent to these processes, methods, products, or devices, or steps or units added based on further optimizations of the inventive concept.

[0032] like Figures 1-5 As shown, this utility model discloses a skid-mounted integrated pilot-scale equipment for contaminated soil remediation, comprising:

[0033] A mixing drum 1 is horizontally positioned along its axis and is used to mix soil and chemicals. A feed hopper 2 is provided at the top of the mixing drum 1. A stirring shaft 3 is coaxially arranged inside the mixing drum 1, and the two ends of the stirring shaft 3 are rotatably connected to the two ends of the mixing drum 1. A drive mechanism 4 is provided on one side of the mixing drum 1 to drive the stirring shaft 3 to rotate. A double-headed helical ribbon 5 is provided on the stirring shaft 3. A connecting pipe 6 is inserted into the top of the mixing drum 1. A nozzle 7 is provided on the top of the inner wall of the mixing drum 1. The connecting pipe 6 is connected to the nozzle 7. A discharge port is provided at the bottom of the mixing drum 1, and a baffle 8 is detachably connected to the discharge port.

[0034] Support 9, which is disposed at the bottom of mixing cylinder 1, is used to support mixing cylinder 1;

[0035] The bottom of the mixing cylinder 1 is provided with a discharge hopper 12, which is located below the discharge port.

[0036] The aforementioned mixing cylinder 1 is a cylindrical structure, horizontally mounted on the support 9. The mixing cylinder 1 can be fixedly connected to the support 9, which supports the bottom of the mixing cylinder 1. The specific structure of the support 9 consists of a flat support plate and vertically mounted support legs at the corners of the support plate. The support legs are fixedly connected to the support plate. The support plate is generally a cuboid structure with a placement groove adapted to the mixing cylinder 1 on one side of its top. The mixing cylinder 1 can be placed and secured in the placement groove. The bottom of the placement groove is open, so that the discharge port at the bottom of the mixing cylinder 1 corresponds to the discharge hopper 12 below the support 9. By opening the baffle 8 of the discharge port, the soil in the mixing cylinder 1 can be discharged into the discharge hopper 12. The remaining positions of the support plate can be used as a platform for experimental equipment, such as a heavy metal analyzer or a balance, so that experiments can be conducted next to the mixing cylinder 1 for convenient operation.

[0037] The feed hopper 2 at the top of the mixing drum 1 is used to add soil or chemicals into the mixing drum 1. The nozzle 7 is used to connect to the external connecting pipe 6. The connecting pipe 6 can be connected to an external water source. Water is sprayed into the mixing drum 1 through the nozzle 7 to mix with the soil and adjust the soil moisture.

[0038] The double-headed spiral ribbon 5 on the aforementioned mixing shaft 3 is used to mix and stir the soil and chemicals in the mixing drum 1. Its specific structure is existing technology and will not be described in detail here.

[0039] In a further embodiment, a control system is also included, which includes a control cabinet 10, a control main board is provided inside the control cabinet 10, and a temperature probe 11 for detecting soil temperature and a probe 11 for detecting soil moisture are provided inside the mixing cylinder 1. The temperature probe 11 and the moisture probe 11 are both electrically connected to the control main board, and the control main board is electrically connected to the nozzle 7 and the drive mechanism 4.

[0040] The control board of the above control system can receive the temperature and humidity inside the mixing cylinder 1 detected by the temperature probe 11 and the humidity probe 11. Based on the detection results, it sends a control signal to control the nozzle 7 and the drive mechanism 4 (it should be noted that the connecting pipe 6 of the nozzle 7 is equipped with a solenoid valve that is electrically connected to the control board. The control board controls the water volume of the nozzle 7 by controlling the opening and closing of the solenoid valve), and adjusts the water spray volume and stirring speed.

[0041] The above-mentioned implementation method of using temperature probe 11 and humidity probe 11 to feed back temperature and humidity signals, thereby controlling the nozzle 7 and drive mechanism 4 through the control motherboard, is existing technology and will not be elaborated here.

[0042] In a further embodiment, the drive mechanism 4 includes a motor reducer 41, which is fixedly connected to one end of the mixing cylinder 1. The output shaft of the motor reducer 41 is coaxially fixedly connected to one end of the stirring shaft 3 through a coupling 42. The other end of the stirring shaft 3 is rotatably connected to the end cover 13 of the mixing cylinder 1 through a bearing assembly.

[0043] The mixing shaft 3 and the output shaft of the motor reducer 41 are coaxially fixedly connected by a coupling 42, so that the rotation of the mixing shaft 3 can be controlled by the motor reducer 41, thereby realizing the mixing of the soil in the mixing drum 1 and making it fully mixed with the solidification and stabilization agent or water.

[0044] In one specific embodiment, two slots 14 are fixedly connected to the bottom of the outer wall of the mixing cylinder 1 on both sides of the discharge port. The slots 14 are L-shaped. The vertical parts of the two slots 14 are fixedly connected to the mixing cylinder 1, and the horizontal parts of the two slots 14 are arranged facing each other. The baffle 8 is slidably connected between the horizontal part and the mixing cylinder 1 to seal the discharge port.

[0045] The aforementioned slot 14 is configured as an L-shaped structure, with its width slightly larger than the size of the discharge port. The size of the baffle 8 is also slightly larger than the size of the discharge port. The vertical part of the L-shaped slot 14 is inserted and fixed to the bottom of the mixing cylinder 1. The horizontal parts of the L-shaped slot 14 are arranged facing each other. A gap is formed between the horizontal parts of the two slots 14 and the wall of the mixing cylinder 1 for inserting the baffle 8, so that the discharge port is sealed after the baffle 8 is inserted. When it is necessary to discharge the soil in the mixing cylinder 1, the baffle 8 is opened and the soil falls from the discharge port into the discharge hopper 12.

[0046] In a further embodiment, the temperature probe 11 and the humidity probe 11 are detachably connected to the mixing cylinder 1;

[0047] The inner wall of the mixing cylinder 1 is provided with an internal threaded sleeve 15, and the temperature probe 11 and humidity probe 11 are threaded into the internal threaded sleeve 15.

[0048] Temperature probe 11 and humidity probe 11 are detachably connected to mixing cylinder 1. Depending on the requirements, temperature probe 11 or humidity probe 11 can be selected for detection.

[0049] In a further specific embodiment, both the bottom of the support leg and the bottom of the discharge hopper 12 are provided with caster wheel assemblies 16.

[0050] By installing caster wheel assemblies 16 at the bottom of the support 9 and the discharge hopper 12, it is convenient to move the equipment and to move the discharge hopper 12 to process the soil inside.

[0051] The nozzle 7 and the connecting pipe 6 are connected by a connector 17. The connector 17 has a convex structure and is axially through the middle part. The connector 17 is inserted through the side wall of the mixing cylinder 1. The small diameter end of the connector 17 is used to connect to the connecting pipe 6, and the inner wall of the large diameter end of the connector 17 is provided with an internal thread for threaded connection to the nozzle 7.

[0052] The connecting pipe 6 mentioned above is a flexible hose structure, which can be used to connect to an external water source or pipe. The connector 17 is set as a convex structure, with the large diameter used to insert the nozzle 7 and the small diameter used to fit the connecting pipe 6. The connector 17 passes through and is fixed on the side wall of the mixing cylinder 1, making it easy to screw in the nozzle 7 and connect the water pipe.

[0053] The above specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0054] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

[0055] The present invention has been described in a relatively specific and detailed manner above through general description and specific embodiments. It should be noted that, without departing from the concept of the present invention, various modifications and improvements can be made to these specific embodiments, all of which fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A skid-mounted integrated pilot-scale equipment for remediating contaminated soil, characterized in that, include: A mixing drum, with its axis horizontally aligned, is used to mix soil and chemicals. A feed hopper is located at the top of the mixing drum. A stirring shaft is coaxially mounted inside the mixing drum, with both ends of the stirring shaft rotatably connected to both ends of the mixing drum. A drive mechanism is located on one side of the mixing drum to drive the stirring shaft to rotate. A double-ended helical ribbon is mounted on the stirring shaft. A connecting pipe is inserted into the top of the mixing drum. A nozzle is located at the top of the inner wall of the mixing drum, and the connecting pipe communicates with the nozzle. A discharge port is located at the bottom of the mixing drum, and a baffle is detachably connected to the discharge port. A support bracket is disposed at the bottom of the mixing cylinder to support the mixing cylinder; The bottom of the mixing cylinder is provided with a discharge hopper, which is located below the discharge port.

2. The skid-mounted integrated pilot-scale equipment for contaminated soil remediation according to claim 1, characterized in that: The bracket includes a support plate and support legs at the bottom corners of the support plate. The support legs are fixedly connected to the support plate. A placement groove is provided on the top of the support plate. The mixing cylinder is snapped and fixed in the placement groove. The part of the top of the support plate without the placement groove forms a placement platform for placing measuring experimental equipment and instruments.

3. The skid-mounted integrated pilot-scale equipment for contaminated soil remediation according to claim 1, characterized in that: It also includes a control system, which includes a control cabinet containing a control main board. The mixing drum contains a temperature probe for detecting soil temperature and a probe for detecting soil moisture. Both the temperature probe and the moisture probe are electrically connected to the control main board. The control main board is electrically connected to the nozzle and the drive mechanism.

4. The skid-mounted integrated pilot-scale equipment for contaminated soil remediation according to claim 1, characterized in that: The driving mechanism includes a motor reducer, which is fixedly connected to one end of the mixing drum. The output shaft of the motor reducer is coaxially fixedly connected to one end of the stirring shaft via a coupling. The other end of the stirring shaft is rotatably connected to the end cover of the mixing drum via a bearing assembly.

5. The skid-mounted integrated pilot-scale equipment for contaminated soil remediation according to claim 1, characterized in that: The bottom of the outer wall of the mixing cylinder is fixedly connected to two slots on both sides of the discharge port. The slots are L-shaped. The vertical parts of the two slots are fixedly connected to the mixing cylinder, and the horizontal parts of the two slots are arranged facing each other. A baffle is slidably connected between the horizontal part and the mixing cylinder to seal the discharge port.

6. The skid-mounted integrated pilot-scale contaminated soil remediation equipment according to claim 3, characterized in that: The temperature probe and humidity probe are detachably connected to the mixing cylinder; The inner wall of the mixing cylinder is provided with an internal threaded sleeve, and the temperature probe and humidity probe are threaded into the internal threaded sleeve.

7. A skid-mounted integrated pilot-scale contaminated soil remediation equipment according to claim 2, characterized in that: The bottom of the support leg and the discharge hopper are both equipped with caster wheels.

8. The skid-mounted integrated pilot-scale equipment for contaminated soil remediation according to claim 1, characterized in that: The nozzle and the connecting pipe are connected by a connector. The connector has a convex structure and is axially oriented through the middle. The connector is inserted through the side wall of the mixing cylinder. The small diameter end of the connector is used to connect to the connecting pipe, and the inner wall of the large diameter end of the connector is provided with an internal thread for threaded connection to the nozzle.

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