Enhanced leaching device for high-concentration heavy metal contaminated soil

Abstract

The utility model discloses a reinforced leaching device for high-concentration heavy metal contaminated soil. The reinforced leaching device comprises a crushing unit, an air mixing unit and a reciprocating type pressing plate separation unit, a discharge hole of the crushing unit is communicated with the air mixing unit; the air mixing unit comprises an air mixing box, a plurality of air amplifiers and a plurality of spraying pipes; the air mixing box is of a hollow cavity structure, a downward discharging opening is formed in one side of the bottom face of the air mixing box and communicates with the reciprocating type pressing plate separation unit, and the air amplifier is arranged on the side face. The air amplifier is adopted to replace a fan, the problem of long-term use reliability of the fan in a high-dust environment can be effectively solved, in addition, a reciprocating type pressing plate separation unit is adopted on the water-soil separation device, water-soil mixtures are extruded through reciprocating motion of a pressing plate, and water-soil separation is achieved through filter cloth. Furthermore, an electrode is arranged on the reciprocating type pressing plate separation unit, particles in the soil are promoted to move through an electric field, and the separation effect of a leaching method is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to an enhanced leaching device for soil contaminated with high concentration heavy metals. Background Art

[0002] In the treatment of high-concentration heavy metal contaminated soil, chemical leaching is a common treatment method. Through the interaction between the eluent and the soil, the heavy metal ions in the soil can be transferred to the solution, thereby achieving the treatment of the contaminated soil.

[0003] At present, the commonly used elution operation generally mixes the elution liquid with the soil to form muddy water, and then filters the waste liquid through a filter device; the elution process is inefficient and time-consuming. Patent CN116441295A A heavy metal contaminated soil remediation device discloses a method of mixing soil powder with water mist through wind power to achieve full contact between the elution liquid and soil particles, which can reduce the use of elution liquid. However, the technical solution of this patent has the following problems: due to the large amount of dust at the work site, dust is easily accumulated on the fan, causing the fan to overheat during use. The conical cylinder used in this patent has the problem of insufficient separation of soil and liquid in practice, which is not suitable for on-site operations. Utility Model Content

[0004] The utility model aims to provide an enhanced leaching device for high-concentration heavy metal contaminated soil to solve the problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides an enhanced elution device for high-concentration heavy metal contaminated soil, including a crushing unit, an air mixing unit, and a reciprocating pressure plate separation unit; the crushing unit discharge port is connected with the air mixing unit; the air mixing unit includes an air mixing box, a plurality of air amplifiers, and a plurality of spray pipes; the air mixing box is an internal hollow cavity structure, a downward discharge port is arranged on one side of the bottom surface and is connected to the reciprocating pressure plate separation unit, and the air amplifier is arranged on the side.

[0006] Furthermore, the crushing unit includes a crusher, and the discharge port of the crusher is connected to the air mixing unit through a crushing discharge pipe; the crushing discharge pipe is a tubular structure, and a plurality of staggered inclined baffle plates are arranged inside, and the inclined baffle plates are arranged obliquely, with the higher side in contact with the inner wall of the crushing discharge pipe and the lower side having a gap with the inner wall of the crushing discharge pipe, and the higher of the adjacent inclined baffle plates is located below the gap between the lower side of the upper inclined baffle plate and the inner wall of the crushing discharge pipe.

[0007] Furthermore, the bottom surface of the air mixing box is arranged at an angle, the top surface on the higher side of the bottom surface is connected to the crushing discharge pipe, the top surface on the lower side of the bottom surface is provided with a downward inclined surface, and the lower side of the bottom surface is provided with a downward discharge port; the air amplifier is arranged on the side surface of the higher side of the bottom surface.

[0008] Furthermore, there are two spray pipes, which are respectively arranged on both sides of the crushing discharge pipe.

[0009] Furthermore, the reciprocating pressure plate separation unit includes a separation box, a separation pressure plate, a separation feed port, a push rod, a push rod cylinder, a plurality of filter components, and a plurality of guide rods; the separation box is an internal hollow cavity structure, a separation feed port is provided in the upper center, and openable and closable filter components are provided on both sides of the lower part; the separation pressure plate is arranged in the separation box, a push rod is connected to the center of one side, and the other side of the push rod extends out of the separation box and is connected to the push rod cylinder; the guide rod is perpendicular to the separation pressure plate, arranged inside the separation box, and a through hole passing through the guide rod is provided on the separation pressure plate.

[0010] Furthermore, the push rod cylinder includes two push hydraulic cylinders, which are respectively arranged on both sides of the separation box body, and the piston rods of the two push hydraulic cylinders are connected to the push rod plate, and the push rod is connected to the push rod plate.

[0011] Furthermore, flat electrodes are arranged on both sides of the separation pressure plate and on the inner wall of the separation box relative to the separation pressure plate, wherein the electrodes arranged on both sides of the separation pressure plate are connected to the power supply via wires arranged on the push rod, and the electrodes on the inner wall of the separation box are connected to the power supply via wires passing through the separation box.

[0012] The utility model adopts an air amplifier to replace the fan, which can effectively solve the problem of long-term reliability of the fan in a high-dust environment. In addition, in the water-soil separation device, the present application adopts a reciprocating pressure plate separation unit, which realizes the extrusion of the water-soil mixture through the reciprocating motion of the pressure plate, and realizes the water-soil separation through the filter cloth. Furthermore, by setting electrodes in the reciprocating pressure plate separation unit, the electric field is used to promote the movement of particles in the soil, thereby improving the separation effect of the elution method. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall solution of the utility model.

[0014] Figure 2 It is a partial cutaway schematic diagram of the utility model.

[0015] Figure 3 It is a partial schematic diagram of the air mixing unit of the utility model.

[0016] Figure 4 It is a cutaway schematic diagram of a reciprocating pressure plate separation unit of the utility model.

[0017] Figure 5 This is a partial schematic diagram of the filter assembly of the utility model DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] As attached Figure 1-5 As shown, the enhanced elution device for high-concentration heavy metal contaminated soil involved in the utility model includes a crushing unit 1, an air mixing unit 2, and a reciprocating pressure plate separation unit 3.

[0020] The crushing unit 1 comprises a crusher 11, which is used to crush the contaminated soil to be treated to form powder. The crusher 11 may be a common commercially available crusher 11, such as a roller crusher.

[0021] The discharge port of the crusher 11 is connected to the air mixing unit 2 through the crushing discharge pipe 12.

[0022] As attached Figure 1 , 2 As shown, the crushing discharge pipe 12 is a tubular structure, and is provided with a plurality of staggered inclined baffle plates 121 inside. The inclined baffle plates 121 are arranged obliquely, and the higher side is in contact with the inner wall of the crushing discharge pipe 12, and a gap is provided between the lower side and the inner wall of the crushing discharge pipe 12. The higher inclined baffle plates 121 adjacent to the inclined baffle plates 121 are located below the gap between the lower side of the upper inclined baffle plate 121 and the inner wall of the crushing discharge pipe 12, so as to prevent excessive soil inside the air mixing unit 2 from entering the crusher 11 above.

[0023] As attached Figure 1 , 2 As shown in FIG. 3 , the air mixing unit 2 includes an air mixing box 21 , a plurality of air amplifiers 22 , and a plurality of spray pipes 23 .

[0024] The air mixing box 21 is a hollow cavity structure with an inclined bottom surface. The top surface of the higher side of the bottom surface is connected to the crushing discharge pipe 12, and the top surface of the lower side of the bottom surface is provided with a downward inclined surface 210. A downward discharge port 211 is provided on the lower side of the bottom surface.

[0025] The air amplifiers 22 are arranged on the side surface of the higher side of the bottom surface, and the figure includes four air amplifiers.

[0026] There are two spray pipes 23 in the attached drawings, which are respectively arranged on both sides of the crushing discharge pipe 12, so that there are water curtains on both sides of the soil particle flow left in the crushing discharge pipe 12, which effectively reduces the "dust" problem that may be generated by soil particles during the wind soul process.

[0027] The air amplifier 22 adopts a commercially available product and uses compressed air as a power source to drive the surrounding air to flow to form a high-pressure, high-speed airflow. It has no moving parts in the structure and is suitable for high-dust environments. Its specific structure does not fall within the scope of protection of this application.

[0028] As attached Figure 1 , 2 As shown in , 4 , the reciprocating pressure plate separation unit 3 includes a separation box 31 , a separation pressure plate 32 , a separation feed port 33 , a push rod 34 , a push rod cylinder 35 , a plurality of filter components 36 , and a plurality of guide rods 37 .

[0029] The separation box 31 is a hollow cavity structure, a separation feed inlet 33 is arranged at the center of the upper part, and filter components 36 are arranged on both sides of the lower part.

[0030] As attached Figure 5 As shown, the filter assembly 36 can be opened and closed and arranged on the bottom surface of the separation box 31, including a frame 361 and a filter material 362. The frame 362 can be opened and closed and arranged at the notch on the bottom surface of the separation box 31. The opening and closing connection can be achieved by hinges, and the fixation and separation can be achieved by bolts. The frame 361 in the accompanying drawings is provided with a vertical protrusion. When the frame 361 is snapped into the notch on the bottom surface of the separation box 31, the vertical protrusion is fitted with the side wall of the box 31, and the vertical protrusion and the side wall of the box 31 are locked by tightening the bolts. The filter material 361 includes a stainless steel filter plate layer p1 and a filter cloth p2. The filter cloth p2 is arranged between two layers of stainless steel filter plate layers p1. The stainless steel filter plate layer p1 is detachably fixed to the frame 361, and an array of through holes is also provided on the frame.

[0031] The separation pressure plate 32 is arranged in the separation box 31, and a push rod 34 is connected to the center of one side. The other side of the push rod extends out of the separation box 31 and is connected to the push rod cylinder 35. Two push hydraulic cylinders 351 are arranged in the figure, which are arranged on both sides of the separation box 31 respectively. The piston rods of the two push hydraulic cylinders 351 are connected to the push rod plate 352, and the push rod 34 is connected to the push rod plate 352. The push rod 34, the piston rod of the push hydraulic cylinder 351 and the push rod plate 352 can be fixedly connected as shown in the figure, or can be hinged.

[0032] The guide rod 37 is perpendicular to the separation pressure plate 32 and is arranged inside the separation box 31 . The separation pressure plate 32 is provided with a through hole through which the guide rod 37 passes.

[0033] The separation pressing plate 32 moves to one side of the separation feed inlet 33, and the water-soil mixture enters the separation box 31 through the separation feed inlet 33. After reaching a preset amount, the separation pressing plate 32 moves to the other side of the separation feed inlet 33 to squeeze the water-soil mixture on this side, and the water flows out through the filter assembly 36. After the compression is completed, the filter assembly 36 is opened to push out the soil. The two sides can be operated alternately.

[0034] Furthermore, flat electrodes 41 are arranged on both sides of the separation plate 32 and on the inner wall of the separation box 31 opposite thereto, wherein the electrodes arranged on both sides of the separation plate 32 are connected to the power supply via wires arranged on the push rod 34, and the electrodes on the inner wall of the separation box 31 are connected to the power supply 42 via wires passing through the separation box 31. The separation effect is improved by ionization, and during the ionization process, the separation plate 32 can reciprocate multiple times on one side of the separation feed port 33 to change the distance between the electrodes, realize the dynamic change of the ionization electric field, and help improve the ionization effect.

[0035] It should be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

Claims

1. An enhanced leaching device for high-concentration heavy metal contaminated soil, characterized in that: It includes a crushing unit, an air mixing unit, and a reciprocating pressure plate separation unit; the crushing unit discharge port is connected to the air mixing unit; the air mixing unit includes an air mixing box, a plurality of air amplifiers, and a plurality of spray pipes; the air mixing box is an internal hollow cavity structure, a downward discharge port is arranged on one side of the bottom surface to be connected to the reciprocating pressure plate separation unit, and the air amplifier is arranged on the side.

2. The enhanced elution device for high-concentration heavy metal contaminated soil according to claim 1 is characterized in that: The crushing unit includes a crusher, and the discharge port of the crusher is connected to the air mixing unit through a crushing discharge pipe; the crushing discharge pipe is a tubular structure, and a plurality of staggered inclined baffle plates are arranged inside, the inclined baffle plates are arranged obliquely, and the higher side is in contact with the inner wall of the crushing discharge pipe, and a gap is set between the lower side and the inner wall of the crushing discharge pipe, and the higher of the adjacent inclined baffle plates is located below the gap between the lower side of the upper inclined baffle plate and the inner wall of the crushing discharge pipe.

3. The enhanced elution device for high-concentration heavy metal contaminated soil according to claim 2 is characterized in that: The bottom surface of the air mixing box is arranged inclined, the top surface on the higher side of the bottom surface is connected to the crushing discharge pipe, the top surface on the lower side of the bottom surface is provided with a downward inclined surface, and the lower side of the bottom surface is provided with a downward discharge port; the air amplifier is arranged on the side surface of the higher side of the bottom surface.

4. The enhanced elution device for high-concentration heavy metal contaminated soil according to claim 3 is characterized in that: There are two spray pipes, which are respectively arranged on both sides of the crushing discharge pipe.

5. The enhanced elution device for high-concentration heavy metal contaminated soil according to claim 4 is characterized in that: The reciprocating pressure plate separation unit includes a separation box, a separation pressure plate, a separation feed port, a push rod, a push rod cylinder, a plurality of filter components, and a plurality of guide rods; the separation box is an internal hollow cavity structure, a separation feed port is provided in the upper center, and openable and closable filter components are provided on both sides of the lower part; the separation pressure plate is arranged in the separation box, a push rod is connected to the center of one side, and the other side of the push rod extends out of the separation box and is connected to the push rod cylinder; the guide rod is perpendicular to the separation pressure plate, arranged inside the separation box, and a through hole is provided on the separation pressure plate to pass through the guide rod.

6. The enhanced elution device for high-concentration heavy metal contaminated soil according to claim 5, characterized in that: The push rod cylinder comprises two push hydraulic cylinders which are respectively arranged at two sides of the separation box body, the piston rods of the two push hydraulic cylinders are connected to the push rod plate, and the push rod is connected to the push rod plate.

7. The enhanced elution device for high-concentration heavy metal contaminated soil according to claim 6, characterized in that: Flat electrodes are arranged on both sides of the separation plate and on the inner wall of the separation box relative to the separation plate, wherein the electrodes arranged on both sides of the separation plate are connected to the power supply via wires arranged on the push rod, and the electrodes on the inner wall of the separation box are connected to the power supply via wires passing through the separation box.

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