Soil pretreatment device for soil remediation equipment

Abstract

The application relates to a soil pretreatment device for a soil remediation device, which comprises a primary treatment unit, a secondary treatment unit and a tertiary treatment unit, wherein the primary treatment unit is used for primary screening of soil, the secondary treatment unit is used for refining the granularity of large soil particles, and the tertiary treatment unit is used for further refining the granularity of soil particles; the three treatment units are arranged in cooperation with each other, are relatively compact in structure, small in occupied area, can effectively and efficiently treat soil, can make the soil conveniently mixed with a remediation agent, and are beneficial to full contact of toxic and harmful substances in the soil with the remediation agent.

Description

Technical Field

[0001] This invention relates to the field of soil remediation equipment, and more particularly to a soil pretreatment device for use in soil remediation equipment. Background Technology

[0002] For soils contaminated with heavy metals, the main remediation technologies include excavation, stabilization and solidification, chemical leaching, air stripping, thermal treatment, and bioremediation. Compared with other remediation technologies, stabilization and solidification technology has advantages such as shorter treatment time and wider applicability. Stabilization and solidification involves adding soil additives (solidifying agents) to alter the physicochemical properties of the soil. Through the adsorption or co-precipitation of heavy metals, the soil's form is changed, thereby reducing its bioavailability and mobility.

[0003] The development trend of soil remediation equipment using stabilization and solidification technology is as follows: from fixed equipment to mobile remediation equipment; from in-situ remediation technology to ex-situ remediation technology. Currently, mobile ex-situ remediation equipment, limited by installation space, often uses a simple method of breaking up the soil and mixing it with the remediation agent. While this soil pretreatment structure occupies little space and can help mix the soil and remediation agent to some extent, the processing method is too coarse, resulting in soil particles that are still relatively large. This makes it difficult for the remediation agent to fully mix with toxic and harmful substances in the soil, thus affecting the remediation effect. Furthermore, if the soil contains large-volume waste such as plastic bags, it can easily become entangled on the breaking rollers, requiring downtime for processing, which is time-consuming, while manual removal is cumbersome. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides a soil pretreatment device for soil remediation equipment. It is not only compact in structure, highly integrated, and occupies a small area, but also, through the cooperation of multiple processing units, can refine the soil particle size to facilitate mixing with the remediation agent, thereby facilitating full contact between toxic and harmful substances in the soil and the remediation agent.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A soil pretreatment device for use in soil remediation equipment, comprising:

[0007] A primary processing unit includes a screen frame with a vibrating screen inclined on the screen frame. The vibrating screen has a feed inlet and a waste outlet at both ends. The bottom of the vibrating screen has fine screen holes and coarse screen holes in sequence along the screening direction. A first guide pipe fixed to the screen frame is connected below the fine screen holes, and a second guide pipe fixed to the screen frame is connected below the coarse screen holes.

[0008] The secondary processing unit includes multiple crushing rollers disposed in the second feed tube and a first driving component thereof;

[0009] The three-stage processing unit includes a grinding cylinder containing a lower grinding disc and an upper grinding disc. The upper grinding disc is located at the top of the grinding cylinder. The lower grinding disc is driven to rise and fall by a second driving component, allowing it to have a feeding state away from the upper grinding disc and a grinding state close to the upper grinding disc. The lower grinding disc is driven to rotate by a third driving component. A pressure sensor is installed inside the lower grinding disc to adjust its height according to the degree of soil grinding. The side wall of the grinding cylinder has a grinding inlet and a grinding outlet, with the grinding outlet positioned higher than the grinding inlet. The grinding inlet is located above the lower grinding disc in the feeding state and feeds through an externally connected first and second guide pipe. A first seal is provided at the grinding inlet to control the feeding, and a second seal is provided at the grinding outlet to control the discharge.

[0010] In one example, the second drive component includes a telescopic cylinder, the output top of which is connected to a positioning frame, and an upper grinding disc is rotatably mounted on the top of the positioning frame. The third drive component is fixed between the positioning frame and the upper grinding disc. The first sealing element is a sealing plate fixed to the bottom of the positioning frame to block or expose the grinding feed port as the upper grinding disc rises and falls.

[0011] In one example, the second seal is a filter screen located at the grinding outlet.

[0012] In one example, a pneumatic vibrator is provided at the filter screen.

[0013] In one example, the grinding outlet is located below the lower grinding disc during the grinding process.

[0014] In one example, a discharge channel is provided outside the grinding outlet, a temporary storage space communicating with the discharge channel is formed at the lower part of the grinding cylinder, a discharge port is provided at the bottom of the temporary storage space, and an iris mechanism is provided at the discharge port.

[0015] In one example, the tilt angle of the vibrating screen is 5-15 degrees.

[0016] In one example, an end plate is fixed to the inclined lower end of the vibrating screen, the waste outlet is located on one side of the vibrating screen in front of the end plate, and a waste discharge mechanism is provided on the other side of the vibrating screen; the waste discharge mechanism includes a coil spring baffle, the end of which is connected to a push plate, which can be driven by a fourth driving component to reciprocate in the vertical screening direction to push out soil waste; a waste temporary storage box is connected to the outside of the waste outlet.

[0017] In one example, two grinding feed inlets are symmetrically provided, which are respectively connected to the first feed pipe and the second feed pipe.

[0018] In one example, the grinding outlet and the grinding inlet are offset along the circumferential direction of the grinding cylinder.

[0019] The present invention employs the above-described structure and has the following advantages:

[0020] 1. Structurally, this soil pretreatment device integrates three treatment units well, with a compact structure and small footprint, making it easy to apply to remediation equipment; in addition, the structure has good strength and can meet the requirements of large treatment capacity.

[0021] 2. In terms of effectiveness, this soil pretreatment device, through the cooperation of three treatment units, can effectively treat the soil to achieve a better particle size for mixing with the remediation agent, thus facilitating full contact between the remediation agent and toxic and harmful substances in the soil.

[0022] 3. In terms of efficiency, this soil pretreatment device adopts a multi-stage classification and treatment method, which has a high treatment efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0024] Figure 2 for Figure 1 Another structural diagram with the fourth driving component added from another angle;

[0025] Figure 3 for Figure 2 A cross-sectional structural schematic diagram;

[0026] Figure 4 for Figure 3 A schematic cross-sectional view of the grinding cylinder in the vertical direction;

[0027] Figure 5 for Figure 4 A schematic diagram of the structure of the lower and middle grinding discs that rise.

[0028] In the diagram, a is the primary processing unit, a1 is the screen frame, a2 is the vibrator, a3 is the vibrating screen, a4 is the screening inlet, a5 is the waste outlet, a6 is the fine screen hole, a7 is the coarse screen hole, a8 is the first guide pipe, a9 is the second guide pipe, a10 is the coil spring baffle, a11 is the push plate, a12 is the fourth drive component, and a13 is the waste temporary storage box.

[0029] b. Secondary processing unit; b1. Crushing roller; b2. First driving component;

[0030] c. Three-stage processing unit, c1. Grinding cylinder, c2. Lower grinding disc, c3. Upper grinding disc, c4. Second drive unit, c5. Third drive unit, c6. Grinding feed inlet, c7. Grinding discharge outlet, c8. First seal, c9. Second seal, c10. Positioning frame, c11. Pneumatic vibrator, c12. Air pump, c13. Temporary storage space, c14. Iris recognition mechanism, c15. Discharge channel. Detailed Implementation

[0031] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0032] like Figure 1-5 As shown, in this embodiment, the soil pretreatment device for soil remediation equipment includes a primary treatment unit a, a secondary treatment unit b, and a tertiary treatment unit c; wherein:

[0033] The primary processing unit can screen out large-volume waste such as plastic bags, preventing them from entangled and accumulating on the crushing rollers and affecting the crushing effect. It can also perform preliminary screening of soil, which helps to improve soil treatment efficiency. The primary processing unit specifically includes a screen frame a1. A vibrating screen a3 is inclinedly mounted on the screen frame a1 via a vibration motor a2 and a spring. The vibrating screen a3 has a screening inlet a4 and a waste outlet a5 at both ends. The bottom of the vibrating screen a3 has a fine screen hole a6 and a coarse screen hole a7 arranged sequentially along the screening direction. A first guide pipe a8 fixed to the screen frame a1 is connected below the fine screen hole a6, and a second guide pipe a9 fixed to the screen frame a1 is connected below the coarse screen hole a7.

[0034] The secondary processing unit is used to further refine the coarsely screened soil, and then mix it with the finely screened soil. This not only reduces the burden on subsequent processing units, but also improves soil treatment efficiency. Specifically, it includes multiple crushing rollers b1 and a first driving component b2 located in the second feed pipe a9. The first driving component b2 can be driven by a motor and gears.

[0035] The third-stage treatment unit further grinds the soil to achieve a better particle size for mixing with the remediation agent. Specifically, it includes a grinding cylinder c1, inside which are a lower grinding disc c2 and an upper grinding disc c3. The upper grinding disc c3 is located at the top of the grinding cylinder c1. The lower grinding disc c2 is driven to rise and fall by a second driving component c4, allowing it to have both a feeding state away from the upper grinding disc c3 and a grinding state close to the upper grinding disc c3. The lower grinding disc c2 is driven to rotate by a third driving component c5. A pressure sensor is provided to adjust the height of the lower grinding disc c2 according to the degree of soil grinding. The side wall of the grinding cylinder c1 is provided with a grinding inlet c6 and a grinding outlet c7, and the grinding outlet c7 is set higher than the grinding inlet c6. The grinding inlet c6 is located above the lower grinding disc c2 in the feeding state, and feeds through an external first guide pipe a8 and a second guide pipe a9. The grinding inlet c6 is provided with a first seal c8 to control the feeding, and the grinding outlet c7 is provided with a second seal c9 to control the discharge.

[0036] The three processing units are well integrated together, with a compact structure that not only occupies a small area but also has high structural strength, which can meet the needs of large-capacity soil treatment.

[0037] In one specific embodiment, the second driving component c4 includes a telescopic cylinder, the output top of which is connected to a positioning frame c10. An upper grinding disc c2 is rotatably mounted on the top of the positioning frame. The third driving component c5 is fixed between the positioning frame c10 and the upper grinding disc c2. The first sealing component c9 is a sealing plate fixed to the bottom of the positioning frame, used to seal or expose the feed inlet as the upper grinding disc rises and falls. This structure is simple and convenient. The third driving component can be a conventional motor or a servo motor.

[0038] In one specific embodiment, the second sealing element c9 is a filter screen located at the discharge port to facilitate discharge after the grinding standard is met. To prevent the screen from clogging after a period of use, a pneumatic vibrator c11 can be installed at the filter screen. A compressor or air pump c12 is connected to the vibrator to vibrate, causing the filter screen to vibrate and dislodge the clogging soil. Since pneumatic vibrators are existing technology, they will not be described in detail here. Besides using a filter screen and pneumatic vibrator combination, the second sealing element can also be a sealing plate. The sealing plate requires a telescopic cylinder installed outside the grinding discharge port to drive it to open and close the grinding discharge port.

[0039] In one specific embodiment, the grinding outlet c7 is located below the lower grinding disc c2 in the grinding state. This setting can minimize screen clogging because if the grinding outlet is located above the lower grinding disc, the soil will be thrown towards the screen due to centrifugal force during the grinding process. Since the grinding time has not been reached, the soil particles are larger and are more likely to clog the screen, affecting the output.

[0040] In one specific embodiment, the grinding outlet c7 and the grinding inlet c6 are staggered along the circumferential direction of the grinding cylinder c1 to facilitate the feeding and discharging settings.

[0041] In a specific embodiment, a discharge channel c15 is provided outside the grinding discharge port c7, and a temporary storage space c13 is formed at the lower part of the grinding cylinder c1, which is connected to the discharge channel. A discharge port is provided at the bottom of the temporary storage space c13, and an iris mechanism c14 for controlling the discharge is provided at the discharge port. Since the iris mechanism is a relatively mature existing technology, its structure will not be described in detail here.

[0042] In one specific embodiment, a better screening angle is 5-15 degrees.

[0043] In one specific embodiment, an end plate is fixedly provided at the inclined lower end of the vibrating screen a3, the waste outlet a5 is located on one side of the vibrating screen in front of the end plate, and a waste discharge mechanism is provided on the other side of the vibrating screen; the waste discharge mechanism includes a coil spring baffle a10, the end of the coil spring baffle a10 is connected to a push plate a11, the push plate a11 can be driven by a fourth driving member a12 to reciprocate in the vertical screening direction to push out soil waste; a waste temporary storage box a13 is connected to the outside of the waste outlet.

[0044] When discharging waste, the fourth drive component a12 drives the pusher plate to push the waste towards the waste discharge port. Simultaneously, the coil spring baffle a10 is pulled out, which blocks newly screened waste. After the waste is discharged, the fourth drive component a12 moves in the opposite direction with the pusher plate, awaiting the next waste discharge. Regarding the fourth drive component, it can be... Figure 2 The structure includes telescopic cylinders such as electric push rods. Regarding the waste discharge signal, either a timed drive or an optical sensor on the front of the push plate can be selected to activate the system when a certain amount of waste is accumulated.

[0045] In one specific embodiment, the crushing roller may be provided with multiple upper crushing rollers and multiple lower crushing rollers, the purpose of which is to achieve crushing twice, from top to bottom, for better crushing effect.

[0046] In one specific embodiment, two grinding feed inlets are symmetrically provided, which are respectively connected to the first feed pipe a8 and the second feed pipe a9, so that the feeding is more uniform.

[0047] Soil treatment steps: First, the soil enters the vibrating screen a3 through the screening inlet a4. Under the action of the vibrator a2, the soil moves along the inclined vibrating screen a3 towards the waste outlet a5. During the movement, a portion of the soil that meets the fine screen hole conditions enters the first guide pipe a8 through the fine screen hole a6, and another portion of the soil that meets the coarse screen hole conditions enters the second guide pipe a9 through the coarse screen hole a7. For large-volume waste such as garbage bags, it is discharged from the waste outlet a5 to the waste temporary storage box a13, which can be assisted by the waste discharge mechanism.

[0048] In this process, large clumps of soil entering the second feed pipe a9 are further broken down into smaller clumps by the crushing roller b1. These smaller clumps are then fed from the second feed pipe a9 through the grinding inlet c6 onto the lower grinding disc c2, where they mix with soil directly fed onto the lower grinding disc c2 from the first feed pipe a8. The lower grinding disc c2 then rises under the action of the second drive component c4, while the grinding inlet c6 closes to prevent further feeding. Once the lower grinding disc c2 reaches a certain height (after the pressure sensor reaches its set lower limit), the third drive component c5 drives the lower grinding disc c2 to rotate and grind the soil on it. During grinding, the lower grinding disc c2 rises slightly under the control of the pressure sensor to maintain a consistent grinding pressure, ensuring a good grinding effect. After grinding for a certain period, the second drive component c4 drives the lower grinding disc c2 to descend. When it reaches the grinding outlet c7, the third drive component c5 drives the lower grinding disc c2 to rotate, and under centrifugal force, the soil is discharged from the grinding outlet c7, thus completing the entire soil pretreatment process.

[0049] The specific embodiments described above should not be construed as limiting the scope of protection of this invention. Any alternative modifications or variations made to the embodiments of this invention by those skilled in the art will fall within the scope of protection of this invention. All aspects not detailed in this invention are well-known to those skilled in the art.

Claims

1. Soil pretreatment device for soil remediation equipment, characterized in that, The utility model relates to a soil grinder, which comprises: a primary processing unit including a screen frame, a vibrating screen obliquely arranged on the screen frame, a screening feed inlet and a waste outlet respectively arranged at two ends of the vibrating screen, fine mesh holes and coarse mesh holes arranged in sequence at the bottom of the vibrating screen along the screening direction, a first material guide pipe connected to the screen frame below the fine mesh holes, and a second material guide pipe connected to the screen frame below the coarse mesh holes; a secondary processing unit including a plurality of crushing rollers and a first driving member arranged in the second material guide pipe; a tertiary processing unit including a grinding cylinder, a lower grinding disc and an upper grinding disc arranged in the grinding cylinder, the upper grinding disc arranged at the top of the grinding cylinder, the lower grinding disc driven to ascend and descend by a second driving member so as to have a feeding state away from the upper grinding disc and a grinding state close to the upper grinding disc, the lower grinding disc driven to rotate by a third driving member, a pressure sensor arranged in the lower grinding disc to adjust the height of the lower grinding disc according to the grinding degree of soil, a grinding feed inlet and a grinding discharge outlet arranged on the side wall of the grinding cylinder, the grinding discharge outlet arranged higher than the grinding feed inlet, the grinding feed inlet arranged above the lower grinding disc in the feeding state to feed the soil from the first material guide pipe and the second material guide pipe, a first sealing member arranged at the grinding feed inlet to control the feeding, and a second sealing member arranged at the grinding discharge outlet to control the discharging; the second driving member including a telescopic cylinder, the output top end of the telescopic cylinder connected to a positioning frame, the upper grinding disc rotatably arranged on the top of the positioning frame, and the third driving member fixedly connected between the positioning frame and the upper grinding disc; the first sealing member being a sealing plate fixedly arranged at the bottom of the positioning frame to block or expose the grinding feed inlet according to the ascending and descending of the upper grinding disc, and the second sealing member being a filter screen arranged at the grinding discharge outlet; the grinding discharge outlet arranged below the lower grinding disc in the grinding state.

2. The soil pretreatment device for use on a soil remediation apparatus of claim 1, wherein, a pneumatic vibrator arranged at the filter screen.

3. The soil pretreatment device for use on a soil remediation apparatus of claim 1, wherein, an outlet channel arranged outside the grinding discharge outlet, a temporary storage space formed in the lower part of the grinding cylinder and communicated with the outlet channel, a discharge port arranged at the bottom of the temporary storage space, and an iris mechanism arranged at the discharge port.

4. The soil pretreatment device for use on a soil remediation apparatus of claim 1, wherein, the vibrating screen has an oblique angle of 5-15 degrees.

5. The soil pretreatment device for use on a soil remediation apparatus of claim 1, wherein, an end plate fixedly arranged at the oblique lower end of the vibrating screen, the waste outlet arranged on one side of the vibrating screen in front of the end plate, and a waste discharging mechanism arranged on the other side of the vibrating screen; the waste discharging mechanism including a coil spring and a blocking belt, the end of the coil spring connected to a push plate, and the push plate driven to reciprocate in the vertical screening direction by a fourth driving member to push out the soil waste; a waste temporary storage box connected to the waste outlet.

6. The soil pretreatment device for use on a soil remediation apparatus of claim 1, wherein, two grinding feed inlets symmetrically arranged and respectively connected to the first material guide pipe and the second material guide pipe.

7. The soil pretreatment device for use on a soil remediation apparatus of claim 1, wherein, the grinding discharge outlet and the grinding feed inlet arranged in a staggered manner along the circumferential direction of the grinding cylinder.

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