Screening device for ex-situ remediation of soil

Abstract

The utility model relates to a screening device for ex-situ remediation of soil. Comprising a vibration screening device, a soil transferring device and a block stone transferring device, the vibration screening device is located above the soil transferring device, and the block stone transferring device is located behind the vibration screening device and the soil transferring device; the vibration screening device comprises a vibration box, a vibration assembly is installed in the middle of the vibration box, and a front scattering and crushing assembly and a rear scattering and crushing assembly are further installed in the vibration box. The soil transfer device comprises a conveying belt, a dust cover is arranged above the conveying belt, and a material receiving hopper is mounted at the top of the dust cover; the block stone transferring device comprises an inclined climbing frame, a climbing hopper which is lifted through a lifting assembly is installed on the climbing frame, and the climbing hopper is located below the discharging hopper when located at the low position and turns over when climbing to the high position. According to the device, the chemical adding and incineration treatment effects are guaranteed by improving the dispersity of soil, and damage to follow-up equipment caused by block stones is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of soil remediation equipment, especially relates to a screening device for soil ex situ remediation. BACKGROUND

[0002] Soil ex situ remediation refers to the soil remediation technology that contaminated soil is excavated or extracted from the original position where the pollution occurs, is transported or transferred to other places or positions for treatment and remediation, and is an important method for remediation of contaminated soil. In-situ remediation (refers to soil remediation by in-situ injection of remediation agents) is opposite to it. Soil ex situ remediation generally goes through the following links: soil excavation or extraction, soil stacking and drying, soil turning and dosing remediation or incineration remediation, and soil transfer and backfilling after remediation.

[0003] As known from the foregoing, dosing or incineration of contaminated soil is two important means for treating pollutants in soil. When the dosing remediation process is adopted, the remediation agent needs to be uniformly mixed with the soil to allow the pollutants in the soil to fully react with the remediation agent. When the incineration remediation process is adopted, the contaminated soil needs to pass through the incinerator in a continuous manner, and the pollutants in the soil, especially organic pollutants, are removed by incineration. Both the above-mentioned two treatment methods have a prerequisite, that is, the soil is in a dispersed and uniform state, which can ensure the sufficiency of the dosing reaction and the sufficiency during incineration. Therefore, a step of screening the soil to remove stones contained in the soil to avoid damage to subsequent equipment and to fully disperse the soil to promote the dosing and incineration reaction should be provided before the above-mentioned treatment process. There is a lack of effective technical means for applying the above-mentioned effect to the soil in the prior art, which leads to the presence of lumps, stones and the like in the soil during the dosing and incineration steps, affecting the remediation effect and potentially damaging the equipment.

[0004] In summary, it is necessary to develop and design a screening device that meets the soil ex situ remediation process to solve the above-mentioned technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a screening device for soil ex situ remediation, which applies a dispersing effect to the soil to further break the lumps contained in the soil and applies a screening treatment to the soil to remove the stones contained in the soil, thereby improving the dispersibility of the soil to ensure the effect of dosing and incineration treatment and to avoid damage to subsequent equipment caused by stones.

[0006] The utility model discloses a technical scheme that is: a screening device for soil offsite remediation, comprising a vibrating screening device, a soil transfer device and a block stone transfer device, the vibrating screening device is located above the soil transfer device, and the block stone transfer device is located behind the vibrating screening device and the soil transfer device; the vibrating screening device comprises a vibrating box, a feeding hopper is installed at the rear of the vibrating box, a discharging hopper is installed at the front, a support chassis is installed at the bottom of the box, a screening hole plate is paved on the support chassis, a vibrating assembly is installed at the middle of the vibrating box, and two front and rear scattering and crushing assemblies are further installed in the vibrating box; the soil transfer device comprises a conveying belt, a dust cover is arranged above the conveying belt, a receiving hopper is installed at the top of the dust cover, and an energy dissipation discharging box is installed at the end of the dust cover; the block stone transfer device comprises an inclined climbing frame, a climbing hopper that is lifted by a lifting assembly is installed on the climbing frame, and the climbing hopper is located below the discharging hopper when being at a low position and is turned over when being at a high position.

[0007] Preferably, the scattering and crushing assembly comprises a crushing roller driven by a crushing motor, the crushing roller comprises a rotating roller, a central shaft is arranged at both ends of the rotating roller and is installed in an axle seat on the side wall of the vibrating box, a plurality of pedestals are installed on the outer wall of the rotating roller, and a crushing hammer is hingedly installed on each pedestal.

[0008] Preferably, the vibrating assembly comprises middle supports installed on both sides of the middle of the vibrating box, a connecting beam is installed between the top ends of the two middle supports, left and right two vibrating motors are installed on the connecting beam, left and right two groups of vibrators are installed on the side walls of the vibrating box, the vibrator comprises a shell and an eccentric vibrator installed in the shell, and the rotating shaft of the vibrator is driven by the vibrating motor.

[0009] Preferably, a rear wear plate is installed at the bottom of the feeding hopper, and a front wear plate is installed at the bottom of the discharging hopper.

[0010] Preferably, rear supports are installed at the rear of the vibrating box, the rear supports and the middle supports are installed on support tables on the ground; rear buffer springs are installed at the rear of the vibrating box, and front buffer springs are installed at the front; the rear buffer springs are fixedly installed on the rear supports, and the front buffer springs are fixedly installed on the support tables on the ground.

[0011] Preferably, the energy dissipation discharging box comprises a discharging box body with an outlet at the bottom, a plurality of energy dissipation chains that are fixedly connected to the top wall of the discharging box body at the upper end and can swing freely are installed in the discharging box body, and the soil discharged from the end of the conveying belt hits the energy dissipation chains to obtain energy dissipation effect.

[0012] Preferably, the rear height of the receiving hopper is greater than the front height, and the width dimension of the top of the receiving hopper is greater than the bottom width dimension.

[0013] Preferably, C-shaped steel tracks are installed on both sides of the climbing frame, and connecting seats with rollers are installed at the bottom of the climbing hopper, and the rollers move along the C-shaped steel track on the side and do not fall out.

[0014] Preferably, the lifting assembly comprises a winch installed in the middle of the rear part of the climbing frame and a steering wheel installed at the top of the climbing frame, and a steel cable wound by the winch passes through the steering wheel and is fixedly connected with the climbing hopper at the end.

[0015] The advantages and positive effects of the utility model are:

[0016] The utility model provides a kind of screening device for soil ex-situ remediation, by being provided with the vibration box of vibration component, vibration screening treatment is carried out to the received soil, and the dispersed soil of particle size meeting the requirement falls into soil transfer device after passing through screening aperture plate, is conveyed to next process such as dosing process or incineration process by soil transfer device, and the caked soil and block stone of screening interception flow back, wherein the caked soil is broken up and broken when passing through two-stage breaking and crushing assembly, and after dispersion, it passes through screening aperture plate and enters soil transfer device, and block stone further flows back until being discharged by vibration screening device and entering block stone transfer device, block stone transfer device lifts and tilts block stone, and unloads into the car hopper of vehicle to concentrate processing. Thus, the screening device exerts breaking effect on soil, further breaks up caked soil contained in soil, and exerts screening treatment on soil to remove contained block stone, improves the effect of dosing and incineration treatment by improving the dispersibility of soil, and avoids damage to subsequent equipment by block stone. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view structure schematic diagram of the utility model;

[0018] Figure 2 It is Figure 1 It is the three-dimensional structure schematic diagram of vibration screening device, upper perspective view;

[0019] Figure 3 It is Figure 2 It is the structure schematic diagram of breaking and crushing assembly.

[0020] In the figure:

[0021] 1, feed hopper; 2, rear buffer spring; 3, vibration box; 4, crushing motor; 5, crushing roller; 5-1, rotating roller; 5-2, center shaft; 5-3, base; 5-4, crushing hammer; 6, vibration motor; 7, vibrator; 8, rear support; 9, middle support; 10, front buffer spring; 11, discharge hopper; 12, energy dissipation discharge box; 13, dust cover; 14, discharge motor; 15, receiving hopper; 16, support table; 17, conveying belt; 18, belt rotating roller; 19, climbing frame; 20, connecting seat; 21, climbing hopper; 22, steering wheel; 23, winch; 24, rear wear plate; 25, connecting beam; 26, support chassis; 27, front wear plate. DETAILED DESCRIPTION

[0022] In order to further understand the invention content, characteristics and effects of the present application, the following examples are described in detail.

[0023] Please see Figure 1 The soil ex-situ remediation screening device comprises a vibrating screening device, a soil transfer device and a block stone transfer device. The vibrating screening device is located above the soil transfer device, and the block stone transfer device is located behind the vibrating screening device and the soil transfer device.

[0024] The working principle is that the vibrating screening device vibrates and screens the input soil, and provides a breaking effect for the screened and retained block soil. The screened soil enters the soil transfer device and is transferred to a subsequent device such as a dosing device or a burning device. The screened and retained block stone is finally transferred to the vehicle hopper by the block stone transfer device, and the block stone is pulled away for centralized treatment.

[0025] Please see Figure 2 It can be seen that:

[0026] The vibrating screening device comprises a vibration box 3. A feed hopper 1 is installed at the rear of the vibration box 3, a discharge hopper 11 is installed at the front, a support chassis 26 is installed at the bottom of the box, and a screening hole plate (not shown in the figure) is laid on the support chassis 26. The soil to be screened is transferred into the feed hopper 1 by a shovel or a conveying belt, and is discharged from the discharge hopper 11 after the vibrating screening effect. As shown in the figure, the support chassis 26 has a certain inclination, so that the screened and retained block soil and block stone are spontaneously transferred and moved to the rear under the action of vibration.

[0027] The screen hole plate is bolted and fixed on the support base 26, so that the screen hole plate can be replaced according to the specific particle size requirement of soil screening, and can be quickly disassembled and replaced when the screen hole plate needs to be replaced due to excessive wear. In this embodiment, the rear wear plate 24 is installed at the bottom of the feeding hopper 1, and the front wear plate 27 is installed at the bottom of the discharging hopper 11. By installing wear plates at the bottom of the two hoppers, the wear resistance is improved, and the maintenance cycle of the equipment is prolonged.

[0028] A vibration assembly is installed in the middle of the vibration box 3, which provides the vibration function of the device. In this embodiment, the vibration assembly includes middle supports 9 installed on both sides of the middle of the vibration box 3, a connecting beam 25 is installed between the top ends of the two middle supports 9, left and right two vibration motors 6 are installed on the connecting beam 25, and left and right two groups of vibrators 7 are installed on the side walls of the vibration box 3. The vibrator 7 includes a shell and an eccentric vibrator installed in the shell, and the vibration motor 6 drives the rotating shaft of the vibrator. Specifically, a driving pulley is installed on the output shaft of the vibration motor 6, and a driven pulley is installed on the rotating shaft of the eccentric vibrator, and the driving pulley and the driven pulley are connected by a belt.

[0029] In this embodiment, rear supports 8 are installed on both sides of the rear of the vibration box 3, and the rear supports 8 and the middle supports 9 are installed on the support table 16 on the ground, so that the vibration screening device is installed at a high position and can be located above the soil transfer device. The rear buffer spring 2 is installed on both sides of the rear of the vibration box 3, and the front buffer spring 10 is installed on both sides of the front. The rear buffer spring 2 is fixedly installed on the rear support 8, and the front buffer spring 10 is fixedly installed on the support table 16 on the ground.

[0030] Two front and rear scattering and crushing assemblies are also installed in the vibration box 3. The scattering and crushing assembly is used to apply a scattering and crushing effect to the caked soil screened by the screen, and the large soil blocks are broken into dispersed soil. The stones that cannot be scattered and crushed continue to be transferred backward until they are discharged from the discharging hopper 11.

[0031] Please refer to Figure 3 It can be seen that:

[0032] The scattering and crushing assembly includes a crushing roller 5 driven by a crushing motor 4. The crushing roller 5 includes a rotating roller 5-1, a central shaft 5-2 is provided at both ends of the rotating roller 5-1 and is installed in the shaft seat on the side wall of the vibration box 3, a plurality of bases 5-3 are installed on the outer wall of the rotating roller 5-1, and a crushing hammer 5-4 is hingedly installed on each base 5-3. The crushing motor 4 drives the crushing roller 5 to rotate at high speed, and the crushing hammer 5-4 hits the caked soil to achieve the effect of scattering and crushing.

[0033] As shown in the figure, the breaking hammer 5-4 is a Y-shaped plate formed by fixedly connecting two mirror-symmetrical L-shaped plates, and when rotating, the end of the breaking hammer 5-4 hits the clumped soil. Since the breaking hammer 5-4 is hingedly connected with the base 5-3, when rotating, the breaking hammer 5-4 hits the clumped soil and boulders, and the hitting action promotes the breaking of the clumped soil, and when encountering boulders that cannot be broken, the breaking hammer 5-4 rotates, thereby avoiding the problem of being stuck in the boulders.

[0034] The soil transfer device comprises a conveying belt 17, a dust cover 13 is arranged above the conveying belt 17, and a receiving hopper 15 is arranged at the top of the dust cover 13 and below the vibrating box 3, and a damping discharge box 12 is arranged at the end of the dust cover 13.

[0035] The conveying belt 17 is composed of a belt frame, belt rotating rollers 18 arranged at the first end and the end of the belt frame, and a belt motor for driving the belt rotating rollers 18. The soil discharged from the bottom of the vibrating box 3 falls into the receiving hopper 15 and then falls onto the conveying belt 17, and is transferred to the end of the conveying belt 17.

[0036] In this embodiment, the height of the rear part of the receiving hopper 15 is greater than the height of the front part, and the width of the top opening of the receiving hopper 15 is greater than the width of the bottom. The top profile of the receiving hopper 15 is close to the bottom profile of the vibrating box 3, and the top opening of the receiving hopper 15 covers the bottom of the vibrating box 3, so that the soil falling from above can be fully received, and the soil can be prevented from falling outside.

[0037] In this embodiment, the damping discharge box 12 comprises a discharge box body with an outlet at the bottom, and a plurality of damping chains are arranged inside the discharge box body and are fixedly connected with the top wall of the discharge box body at the upper end and are free to swing. The soil discharged from the end of the conveying belt 17 hits the damping chains to obtain damping effect, and the damped soil is discharged downward through the bottom outlet.

[0038] The boulder transfer device comprises an inclined climbing frame 19, and a climbing hopper 21 is arranged on the climbing frame 19 and is lifted by a lifting assembly. When the climbing hopper 21 is in a low position, it is below the discharge hopper 11, and when the climbing hopper 21 is in a high position, it is overturned. During operation of the device, the climbing hopper 21 is in a low position, i.e., below the discharge hopper 11, and continuously collects the discharged boulders. When the climbing hopper 21 is full of boulders, the lifting assembly lifts the climbing hopper 21 to a high position and overturns it, and the boulders in the hopper fall into the vehicle hopper behind the boulder transfer device, and the boulders are transferred to the stockyard by the vehicle.

[0039] In this embodiment, C-shaped steel tracks are installed on both sides of the climbing frame 19, and a connecting seat 20 with rollers is installed at the bottom of the climbing hopper 21, which moves along the C-shaped steel track on the side without falling out.

[0040] In this embodiment, the lifting assembly includes a winch 23 installed in the middle of the rear part of the climbing frame 19 and a steering wheel 22 installed on the top of the climbing frame 19. The steel cable wound by the winch 23 passes through the steering wheel 22 and is fixedly connected to the end of the climbing hopper 21. When the winch 23 winds the steel cable, the climbing hopper 21 rises along the climbing frame 19, and when it reaches the high position, it produces a tipping action under the action of gravity. After unloading, the winch 23 unwinds the steel cable, and under the gravity of the climbing hopper 21 and the connecting seat 20, the climbing hopper 21 re-descends along the climbing frame 19 to the low position.

[0041] Operation mode:

[0042] The excavated or extracted contaminated soil is stacked in the yard for sufficient drying to reduce the water content. Then the contaminated soil in the yard is fed into the feeding hopper 1 by excavator or conveyor belt. Under the action of vibration, the soil is transferred to the rear along the sieve hole plate at the bottom of the box. In this process, soil particles with a particle size smaller than the hole diameter of the sieve hole plate pass downward, and caked soil and stones are intercepted above. Through two-stage scattering and crushing assemblies, caked soil is further scattered and crushed and further sieved, and stones that cannot be scattered continue to move to the rear until the discharge hopper 11;

[0043] The soil discharged from the bottom of the vibrating box 3 falls into the receiving hopper 15, further falls onto the conveying belt 17, and is finally discharged from the bottom outlet of the energy dissipation discharge box 12 after energy dissipation, enters the dosing equipment or incineration equipment; stones are discharged from the discharge hopper 11 and enter the climbing hopper 21, the climbing hopper 21 is lifted and tipped by the stone shifting device, and the stones in the hopper are tipped and discharged into the vehicle hopper, and then shifted to the yard for further treatment.

Claims

1. A screening device for ex situ remediation of soil, characterized in that: The application relates to a vibrating screening device, a soil transferring device and a block stone transferring device, wherein the vibrating screening device is arranged above the soil transferring device, and the block stone transferring device is arranged behind the vibrating screening device and the soil transferring device; the vibrating screening device comprises a vibrating box (3), a feeding hopper (1) is arranged at the rear part of the vibrating box (3), a discharging hopper (11) is arranged at the front part of the vibrating box (3), a supporting base (26) is arranged at the bottom of the vibrating box (3), a screening hole plate is paved on the supporting base (26), a vibrating assembly is arranged at the middle part of the vibrating box (3), and two front and rear scattering and crushing assemblies are further arranged in the vibrating box (3); the soil transferring device comprises a conveying belt (17), a dustproof cover (13) is arranged above the conveying belt (17), a receiving hopper (15) is arranged at the top of the dustproof cover (13), and an energy-dissipation discharging box (12) is arranged at the tail end of the dustproof cover (13); the block stone transferring device comprises an inclined climbing frame (19), a climbing hopper (21) is arranged on the climbing frame (19) and lifted by a lifting assembly, and the climbing hopper (21) is located below the discharging hopper (11) when being in a low position and is turned over when being in a high position.

2. The soil ex-situ remediation screening device of claim 1, wherein: The scattering and crushing assembly comprises a crushing roller (5) driven by a crushing motor (4), the crushing roller (5) comprises a rotating roller (5-1), central shafts (5-2) are arranged at the two ends of the rotating roller (5-1) and are arranged in shaft seats arranged on the side walls of the vibrating box (3), a plurality of bases (5-3) are arranged on the outer wall of the rotating roller (5-1), and crushing hammers (5-4) are hingedly arranged on the bases (5-3).

3. The soil ex-situ remediation screening device of claim 2, wherein: The vibrating assembly comprises middle supports (9) arranged at the two sides of the middle part of the vibrating box (3), a connecting beam (25) is arranged between the top ends of the two middle supports (9), left and right two vibrating motors (6) are arranged on the connecting beam (25), left and right two groups of vibrators (7) are arranged on the side walls of the vibrating box (3), the vibrator (7) comprises a shell and an eccentric vibrator arranged in the shell, and the rotating shaft of the vibrator is driven by the vibrating motor (6).

4. The screening device for ex situ soil remediation according to claim 3, characterized in that: A rear wear plate (24) is arranged at the bottom of the feeding hopper (1), and a front wear plate (27) is arranged at the bottom of the discharging hopper (11).

5. The soil ex-situ remediation screening device of claim 4, wherein the soil ex-situ remediation screening device further comprises a soil sample container. The rear parts of the vibrating box (3) are provided with rear supports (8), the rear supports (8) and the middle supports (9) are arranged on supporting tables (16) arranged on the ground, rear buffer springs (2) are arranged at the rear parts of the vibrating box (3), and front buffer springs (10) are arranged at the front parts of the vibrating box (3), the rear buffer springs (2) are fixedly arranged on the rear supports (8), and the front buffer springs (10) are fixedly arranged on the supporting tables (16) arranged on the ground.

6. The soil ex-situ remediation screening device of claim 1, wherein: The energy-dissipation discharging box (12) comprises a discharging box body provided with an outlet at the bottom, a plurality of energy-dissipation chains are arranged in the discharging box body and are fixedly connected with the top wall of the discharging box body at the upper end and can swing freely, and the soil discharged from the tail end of the conveying belt (17) hits the energy-dissipation chains to obtain energy-dissipation effect.

7. The apparatus for ex situ remediation of soil according to claim 6, characterized in that: The rear part of the receiving hopper (15) is higher than the front part, and the width dimension of the top of the receiving hopper (15) is larger than the width dimension of the bottom.

8. The screening device for ex situ soil remediation according to claim 1, wherein: Two C-shaped steel tracks are installed on both sides of the climbing frame (19), and a connecting seat (20) with rollers is installed at the bottom of the climbing hopper (21), which moves along the C-shaped steel track on the side without falling out.

9. The soil ex-situ remediation screening device of claim 8, wherein: The lifting assembly includes a winch (23) installed in the middle of the rear part of the climbing frame (19) and a steering wheel (22) installed on the top of the climbing frame (19). The steel cable wound by the winch (23) passes through the steering wheel (22) and is fixedly connected with the climbing hopper (21) at the end.

Images