A heavy metal contaminated soil remediation device

Abstract

The utility model provides a kind of heavy metal contaminated soil remediation device, mainly relates to soil environmental management technical field.A kind of heavy metal contaminated soil remediation device, including base, the bottom surface four corners of the base are fixedly installed with support leg, the center of the top surface of the base is equipped with through-hole, the through-hole is fixedly installed with blanking tube, the upper end of the blanking tube is integrally fixedly installed with hopper, the lower end of the blanking tube is fixedly installed with encircle spraying assembly, and the hopper is equipped with anti-blocking assembly.The utility model has the beneficial effects that: the device is provided with encircle spraying assembly, and the spray head of annular array distribution is used to form staggered net-like water curtain in connecting pipe, so that water flow generates downward thrust while impacting and dispersing caked soil, significantly improves the preliminary scouring efficiency of heavy metal ions, realizes the uniform dispersion and efficient leaching of soil, and improves the processing efficiency.

Description

Technical Field

[0001] This utility model mainly relates to the field of soil environmental remediation technology, specifically a device for remediating heavy metal contaminated soil. Background Technology

[0002] Currently, soil leaching technology is widely used as a highly efficient and rapid physicochemical remediation method. Its principle involves bringing water or a solution containing chemical leaching agents into full contact with contaminated soil, dissolving or stripping heavy metal ions from the soil into the liquid phase, and then removing the pollutants through solid-liquid separation.

[0003] However, in practical applications, traditional rinsing devices generally have many problems: First, soil is prone to adhesion, bridging, and blockage during transportation, especially when dealing with soils with high moisture content or high viscosity, which affects the continuous operation of the equipment; second, the rinsing water is mostly sprayed from one side or top, resulting in uneven water flow distribution, making it difficult to effectively break up soil clumps, leading to insufficient rinsing and low repair efficiency; third, the spraying device is directly exposed to the falling material flow, making it susceptible to damage from sand and gravel impacts, resulting in high equipment maintenance costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a heavy metal contaminated soil remediation device, which is achieved through the following technical solution: A heavy metal contaminated soil remediation device includes a base, with support legs fixedly installed at the four corners of the base's bottom surface. A through hole is opened at the center of the top surface of the base, and a feed pipe is fixedly installed inside the through hole. A hopper is integrally fixedly installed at the upper end of the feed pipe, and a surrounding spray assembly is fixedly installed at the lower end of the feed pipe. An anti-clogging component is provided inside the hopper.

[0005] Furthermore, the surrounding spray assembly includes: A connecting pipe is fixedly installed at the lower end of the feeding pipe; Sprinkler heads: Several sprinkler heads arranged in a ring array are fixedly installed on the outer periphery of the connecting pipe. All sprinkler heads penetrate the inner wall of the connecting pipe and are fixedly connected to it. The water outlet of each sprinkler head extends into the connecting pipe. The connecting pipe is fitted with an annular pipe, and the outer ends of the spray heads are all fixedly connected to the inner side of the annular pipe. A water supply pipe is fixedly connected to one side of the annular pipe.

[0006] Furthermore, the anti-blocking component includes: The U-shaped mounting bracket is fixedly mounted on the top surface of the base; A drive shaft is provided, with its bearing connected to the center of the top surface of the U-shaped mounting bracket; A drive motor is fixedly mounted on the top surface of the U-shaped mounting bracket, and the output shaft of the drive motor is coaxially and fixedly connected to the drive shaft. Helical blades are fixedly mounted on the outside of the drive shaft and are located inside the hopper.

[0007] Furthermore, the spiral blade has a conical structure that is larger at the top and smaller at the bottom, and at least a portion of the spiral blade extends into the feed pipe.

[0008] Furthermore, the drive shaft passes through the feed pipe and the connecting pipe from top to bottom, and a tapered guide plate is fixedly installed at the lower end of the drive shaft.

[0009] Furthermore, an annular baffle is fixedly installed inside the connecting pipe, and the annular baffle is located above the spray head.

[0010] Furthermore, the water outlets of the spray heads are all tilted downwards at 5°-10°.

[0011] Compared with the existing technology, the beneficial effects of this utility model are: 1. This device uses a ring-shaped spray assembly to form an interlaced water curtain within the connecting pipe by distributing spray heads in a circular array. Combined with the downward-sloping water spray design, the water flow generates a downward thrust while impacting and breaking up clumps of soil. This effectively increases the contact area and contact time between water and soil particles, significantly improving the initial flushing efficiency of heavy metal ions, achieving uniform soil dispersal and efficient rinsing, and enhancing treatment efficiency.

[0012] 2. The hopper is equipped with a conical spiral blade structure to prevent clogging. The design, which is larger at the top and smaller at the bottom, enables step-by-step conveying from the hopper to the discharge pipe. In conjunction with the drive motor, the spiral blades rotate, which can both mix loose soil and continuously push materials, preventing the accumulation and blockage of wet or sticky soil in the hopper and discharge pipe, and ensuring that the entire device can operate stably and continuously for a long time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of this utility model; Figure 3 This is the front view of this utility model; Figure 4 This is a schematic diagram of the internal structure of the feed tube of this utility model; Figure 5 This is a partial cross-sectional view of the connecting pipe of this utility model.

[0014] The following are the reference numerals in the attached diagram: 10, base; 101, support leg; 20, feed pipe; 201, hopper; 30, surround spray assembly; 301, connecting pipe; 302, spray head; 303, annular pipe; 304, water supply pipe; 40, anti-clogging assembly; 401, U-shaped mounting bracket; 402, drive shaft; 403, drive motor; 404, spiral blade; 50, conical guide plate; 60, annular baffle. Detailed Implementation

[0015] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0016] Example: A heavy metal contaminated soil remediation device like Figure 1-5 As shown, a heavy metal contaminated soil remediation device has the following specific structure: The base 10 has support legs 101 fixedly installed at the four corners of its bottom surface to stably support the entire device and ensure that the device does not shift or tip over during soil transportation and spraying. The center of the top surface of the base 10 has a through hole, and a feed pipe 20 is fixedly installed in the through hole. A hopper 201 is integrally fixedly installed at the upper end of the feed pipe 20, and a surrounding spraying assembly 30 is fixedly installed at the lower end of the feed pipe 20. An anti-clogging assembly 40 is provided in the hopper 201.

[0017] The working principle described above is as follows: When this device is used for rinsing soil contaminated with heavy metals, the soil to be rinsed is first fed into the hopper 201 by a feeder. Under its own gravity, the soil enters the discharge pipe 20 through the hopper 201 and is transported downwards along the discharge pipe 20 to the lower connecting pipe 301 area. At the same time, the surrounding spray assembly 30 is activated to spray water onto the soil during its descent, forming a surrounding water curtain along the soil's path. This provides initial rinsing and agitation of the soil, allowing it to fully mix with the water to form muddy water. Finally, the muddy water is discharged through the outlet at the bottom of the connecting pipe 301 and sent to a mixer for further processing. During this process, the anti-clogging assembly 40 inside the hopper 201 operates continuously to prevent soil from accumulating and clogging in the hopper 201 and the discharge pipe 20.

[0018] The surrounding spray assembly 30 includes: Connecting pipe 301, the lower end of the feeding pipe 20 is fixedly installed with connecting pipe 301; Sprinkler head 302: Several sprinkler heads 302 arranged in a ring array are fixedly installed on the outer periphery of the connecting pipe 301. All sprinkler heads 302 penetrate the inner wall of the connecting pipe 301 and are fixedly connected to it. The water outlet of the sprinkler head 302 extends into the connecting pipe 301. The annular pipe 303 is provided on the outer sleeve of the connecting pipe 301, and the outer ends of the spray heads 302 are all fixedly connected to the inner side of the annular pipe 303. Water delivery pipe 304, one side of the annular pipe 303 is fixedly connected to the water delivery pipe 304, and also includes a booster water pump connected to the water delivery pipe 304.

[0019] When soil enters the connecting pipe 301 through the discharge pipe 20, the booster pump connected to the water supply pipe 304 starts, pressurizes the water and delivers it to the annular pipe 303. The annular pipe 303 surrounds the connecting pipe 301 and can evenly distribute the pressurized water to several spray heads 302 arranged in a ring array. The water flow sprayed from the spray heads 302 can effectively break up the clumps of soil and enhance the flushing effect on heavy metal ions in the soil, improving the initial rinsing efficiency. Since the spray heads 302 penetrate the inner wall of the connecting pipe 301 and the outlet extends into the connecting pipe 301, the water sprays out from the outlet of the spray heads 302, forming a surrounding water flow. At the same time, the various water flows intertwine to form a network, which greatly increases the contact area between the water flow and the soil. This impacts and breaks up the soil falling in the connecting pipe 301, so that the soil particles are fully mixed with the water. At the same time, it initially flushes the heavy metal ions attached to the soil into the water, forming muddy water containing heavy metals.

[0020] The anti-blocking component 40 includes: U-shaped mounting bracket 401 is fixedly mounted on the top surface of the base 10; Drive shaft 402, the center of the top surface of the U-shaped mounting bracket 401 is provided with drive shaft 402 connected to its bearing; A drive motor 403 is fixedly mounted on the top surface of the U-shaped mounting bracket 401. The output shaft of the drive motor 403 is coaxially and fixedly connected to the drive shaft 402. The drive motor is a geared motor and is electrically connected to a power source. Spiral blade 404 is fixedly mounted on the outside of the drive shaft 402, and the spiral blade 404 is located inside the hopper 201.

[0021] Before the soil is fed into the hopper 201, the drive motor 403 fixed on the top surface of the U-shaped mounting frame 401 is started. The output shaft of the drive motor 403 drives the drive shaft 402, which is fixedly connected to it on the same axis, to rotate. The drive shaft 402 is connected to the bearing of the U-shaped mounting frame 401 to ensure smooth rotation. When the drive shaft 402 rotates, it drives the spiral blades 404 fixedly installed on its outside to rotate synchronously. The spiral blades 404 are located inside the hopper 201. During the rotation, they can play a role in stirring and conveying the soil fed into the hopper 201 downwards, gradually pushing the soil to the bottom of the hopper 201 and sending it into the discharge pipe 20, preventing the soil from accumulating in the hopper 201.

[0022] The spiral blade 404 has a conical structure that is larger at the top and smaller at the bottom, and at least a portion of the spiral blade 404 extends into the discharge pipe 20. When the drive motor 403 drives the drive shaft 402 to rotate, the spiral blade 404 with the larger upper and smaller lower conical structure rotates synchronously. Because the upper part of the spiral blade 404 is large, it can cover a large area of ​​soil in the hopper 201, fully agitating and initially guiding the large amount of soil put into the hopper 201, and gradually conveying the soil towards the center and bottom of the hopper 201. As the soil moves downward, the size of the spiral blade 404 gradually decreases to match the diameter of the discharge pipe 20, and at least a portion of the spiral blade 404 extends into the discharge pipe 20, which can continuously convey and agitate the soil entering the discharge pipe 20, preventing the soil from getting stuck in the discharge pipe 20.

[0023] The drive shaft 402 passes through the feed pipe 20 and the connecting pipe 301 from top to bottom. A conical guide plate 50 is fixedly installed at the lower end of the drive shaft 402. When the drive motor 403 drives the drive shaft 402 to rotate, the drive shaft 402 rotates along its own axis, and the conical guide plate 50 fixedly installed at its lower end rotates synchronously with the drive shaft 402. When the mud and water washed by the surrounding spray assembly 30 reaches the lower end of the connecting pipe 301, the conical surface of the conical guide plate 50 guides the mud and water, making the feed more uniform.

[0024] An annular baffle 60 is fixedly installed inside the connecting pipe 301. The annular baffle 60 is located above the spray head 302 to prevent sand and gravel mixed in the soil from colliding with the spray head 302, thus avoiding damage to the spray head 302 and improving its service life. During the process of soil falling through the hopper 201 and the discharge pipe 20, it may contain hard particles such as sand and gravel. When soil and sand and gravel enter the connecting pipe 301, the annular baffle 60 fixedly installed inside the connecting pipe 301 can block the falling sand and gravel, preventing collisions with the spray head 302 below the sand and gravel.

[0025] When the sprinkler assembly 30 is in operation, the water outlet of the sprinkler head 302 is tilted downward at 5°-10°, so that the water flow direction is downward rather than horizontal or upward, to avoid the sprinkler heads 302 colliding with each other, and to prevent the soil impacted by the water from being pushed towards the sprinkler head 302 in the opposite position; at the same time, when the water flows downward to wash the soil, it will exert a downward force on the soil, pushing the soil particles below the connecting pipe 301, rather than pushing them towards the sprinkler head 302 in the opposite position, to prevent the soil impacted by the water from accumulating towards the sprinkler head 302.

[0026] In explaining this utility model, it should be noted that the terms indicating location are only for ease of description and understanding, and are not intended to limit the installation location of specific technical features. Other possible installation methods are not excluded.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heavy metal contaminated soil remediation device, comprising a base (10), wherein support legs (101) are fixedly installed at the four corners of the bottom surface of the base (10), characterized in that: The base (10) has a through hole at the center of its top surface. A feeding pipe (20) is fixedly installed in the through hole. A hopper (201) is integrally fixedly installed at the upper end of the feeding pipe (20). A surrounding spray assembly (30) is fixedly installed at the lower end of the feeding pipe (20). An anti-blocking assembly (40) is provided in the hopper (201).

2. The heavy metal contaminated soil remediation device of claim 1, wherein: The surrounding spray assembly (30) includes: Connecting pipe (301), the lower end of the feeding pipe (20) is fixedly installed with connecting pipe (301); Sprinkler head (302): Several sprinkler heads (302) arranged in a ring array are fixedly installed on the outer periphery of the connecting pipe (301). The sprinkler heads (302) all penetrate the inner wall of the connecting pipe (301) and are fixedly connected to it. The water outlet of the sprinkler head (302) extends into the connecting pipe (301). The ring pipe (303) is provided on the outer sleeve of the connecting pipe (301), and the outer ends of the spray heads (302) are all fixedly connected to the inner side of the ring pipe (303). Water delivery pipe (304), one side of the annular pipe (303) is fixedly connected to the water delivery pipe (304).

3. The heavy metal contaminated soil remediation device of claim 1, wherein: The anti-blocking component (40) includes: U-shaped mounting bracket (401), the U-shaped mounting bracket (401) is fixedly mounted on the top surface of the base (10); Drive shaft (402), the center of the top surface of the U-shaped mounting bracket (401) is provided with drive shaft (402) connected to its bearing. A drive motor (403) is fixedly mounted on the top surface of the U-shaped mounting bracket (401), and the output shaft of the drive motor (403) is coaxially and fixedly connected to the drive shaft (402). Spiral blade (404), the spiral blade (404) is fixedly mounted on the outside of the drive shaft (402), the spiral blade (404) is located inside the hopper (201).

4. The heavy metal contaminated soil remediation device according to claim 3, characterized in that: The spiral blade (404) has a conical structure that is larger at the top and smaller at the bottom, and at least a portion of the spiral blade (404) extends into the feed pipe (20).

5. The heavy metal contaminated soil remediation device according to claim 4, characterized in that: The drive shaft (402) passes through the feed pipe (20) and the connecting pipe (301) from top to bottom, and a tapered guide plate (50) is fixedly installed at the lower end of the drive shaft (402).

6. The apparatus for remediation of heavy metal contaminated soil according to claim 5, wherein: An annular baffle (60) is fixedly installed inside the connecting pipe (301), and the annular baffle (60) is located above the spray head (302).

7. The heavy metal contaminated soil remediation device according to claim 6, characterized in that: The water outlets of the spray heads (302) are all tilted downwards at 5°-10°.

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