CN214639070U - Integrated leaching equipment for heavy metal contaminated soil - Google Patents
Integrated leaching equipment for heavy metal contaminated soil Download PDFInfo
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- CN214639070U CN214639070U CN202023180329.0U CN202023180329U CN214639070U CN 214639070 U CN214639070 U CN 214639070U CN 202023180329 U CN202023180329 U CN 202023180329U CN 214639070 U CN214639070 U CN 214639070U
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Abstract
The utility model provides an integrated drip washing equipment of heavy metal contaminated soil, include: the high-efficiency grain size screening module is connected with the high-efficiency leaching reaction module to screen the contaminated soil in a grain size manner to remove coarse grains and supply the contaminated soil to the high-efficiency leaching reaction module; the high-efficiency leaching reaction module is used for adding medicine to leach, stirring and ultrasonically oscillating the polluted soil so as to promote the separation of pollutants; the high-efficiency precipitation filter-pressing module is connected with the high-efficiency leaching reaction module so as to screen and filter-press the soil discharged by the high-efficiency precipitation filter-pressing module.
Description
Technical Field
The utility model relates to a soil remediation technical field, in particular to integrated drip washing equipment of heavy metal contaminated soil.
Background
The soil leaching technology is a technology in which a chemical solvent that promotes dissolution or migration of soil contaminants is injected into contaminated soil, so that the contaminants are dissolved, separated, and treated from the soil. The process flow can be divided into: screening the soil size fraction, leaching and separating heavy metal pollutants, and treating the leached soil and waste liquid.
At present, the soil leaching technology has more links, but the leaching and separating effect of the heavy metal polluted soil is still poor. . In the soil size fraction screening link, soil particles are not effectively separated according to the particle size, so that the equipment productivity is low; in the leaching and separating link of the heavy metal pollutants, the amount of the polluted soil and the adding proportion of the medicament cannot reach the optimal degree, so that the waste or the deficiency of the use of the medicament is caused; in addition, the polluted soil and the leaching agent are not uniformly mixed, so that the leaching and separating effect on high-concentration pollutants is poor. These disadvantages combine to affect the utility of this technology.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integrated drip washing equipment of heavy metal contaminated soil to solve the current drip washing equipment that is used for heavy metal contaminated soil repair inefficiency, artifical big problem of participation degree.
In order to solve the technical problem, the utility model provides an integrated drip washing equipment of heavy metal contaminated soil, include:
the high-efficiency grain size screening module is connected with the high-efficiency leaching reaction module to screen the contaminated soil in a grain size manner to remove coarse grains and supply the contaminated soil to the high-efficiency leaching reaction module;
the high-efficiency leaching reaction module is used for adding medicine to leach, stirring and ultrasonically oscillating the polluted soil so as to promote the separation of pollutants;
the high-efficiency precipitation filter-pressing module is connected with the high-efficiency leaching reaction module so as to screen and filter-press the soil discharged by the high-efficiency precipitation filter-pressing module.
Optionally, in the integrated elution equipment for heavy metal contaminated soil, the high-efficiency size fraction screening module includes:
the feeding hopper is used for conveying soil to the high-efficiency multistage screening machine, and the gear roller is arranged below the feeding port to crush coarse particles or stones in the soil;
the efficient multi-stage screening machine is used for carrying out multi-stage hydraulic screening on soil to form large materials, medium materials, small materials and minimum materials respectively, and conveying the minimum materials to the efficient leaching reaction module.
Optionally, in the integrated leaching equipment for heavy metal contaminated soil, the high-efficiency hydraulic multistage screening machine includes:
the top of the screening box is opposite to a feed opening of the feed hopper, and the bottom of the screening box is a discharge opening; 3 layers of filter screens are respectively arranged in the screening box from top to bottom, the diameters of the filter screens are respectively 50mm, 10mm and 2mm, and a conveying belt is arranged at the tail end of each layer of filter screen to convey screened corresponding size fraction particles;
the screening and washing device washes materials on each layer of filter screen;
the screening vibrator drives each layer of filter screen to vibrate;
the screening motor drives the screening vibrator.
Optionally, in the integrated leaching equipment for heavy metal contaminated soil, the integrated leaching equipment further includes a first detection module and a second detection module, wherein:
the first detection module detects large materials, medium materials and small materials, and if the large materials, the medium materials and the small materials are qualified in detection, the large materials, the medium materials and the small materials are used as aggregates for resource utilization; if the detection is unqualified, the large materials, the medium materials and the small materials return to the high-efficiency size fraction screening module for washing.
The second detection module detects the extremely small materials, and if the extremely small materials are detected to be qualified, the extremely small materials are backfilled; and if the detection is unqualified, the extremely small materials enter the high-efficiency leaching reaction module for leaching reaction.
Optionally, in the integrated elution equipment for heavy metal contaminated soil, the high-efficiency elution reaction module comprises an elution reaction box, and a feed inlet and a dosing hole are formed in the top of the elution reaction box;
the automatic dosing device comprises a medicament tank, a pipeline and a spray head, and the spray head enters the leaching reaction box from the dosing hole;
the leaching reaction box plays a supporting role for the medicament tank;
the box body bracket plays a supporting role in the leaching reaction box.
Optionally, in the integrated leaching equipment for heavy metal contaminated soil, the detection result of the second detection module on the extremely small material includes a concentration of a mild heavy metal pollutant, a concentration of a moderate heavy metal pollutant, and a concentration of a severe heavy metal pollutant;
according to the concentration of the mild heavy metal pollutants, the concentration of the moderate heavy metal pollutants and the concentration of the severe heavy metal pollutants, the automatic dosing device is respectively provided with a mild dosing mode, a moderate dosing mode and a severe dosing mode;
the tiny materials enter through a feed inlet of the leaching reaction box;
and starting the automatic dosing device according to the dosing mode corresponding to the concentration of the heavy metal pollutants.
Optionally, in the integrated elution equipment for heavy metal contaminated soil, the high-efficiency elution reaction module further includes a plurality of sets of stirring gears, a set of screw devices, a stirring motor and a speed reducer, wherein:
the stirring gears are arranged at the upper part in the leaching reaction box in a staggered manner and are used for fully stirring the medicament and the soil;
a main shaft of the spiral device is arranged at the bottom in the leaching reaction box, and a spiral blade is arranged on the main shaft and is driven by the main shaft to perform spiral motion so as to push the stirred soil to a discharge hole of the leaching reaction box;
a plurality of stirring rods are welded on the spiral blades and stir the soil in the pushing process;
the stirring motor drives the speed reducer, so that the speed reducer drives the stirring gear and the main shaft of the screw device to rotate;
the discharge hole of the leaching reaction box is arranged on the side wall of the bottom of the leaching reaction box and is positioned at the tail end of the spiral main shaft.
Optionally, in the integrated elution equipment for heavy metal contaminated soil, the high-efficiency elution reaction module further comprises a suspension-type liquid level meter for measuring the liquid level in the elution reaction box in real time, wherein:
the suspension type liquid level meter comprises a suspension module, a rigid connecting device and a top switch;
the suspension module is placed in the leaching reaction box and changes position along with the lifting of the liquid level;
the rigid connecting device transmits a position signal of the suspension module to the top switch;
the top switch controls the spray head of the automatic dosing device to be opened or closed;
when the liquid level in the leaching reaction box rises to reach a threshold value, the rigid connection device pulls up the top switch due to the rising of the suspension module, and the top switch closes the spray head of the automatic dosing device, so that dosing is stopped;
when liquid in the leaching reaction box is discharged and the liquid level drops, the rigid connection device pulls down the top switch due to the lowering of the suspension module, and the top switch opens the spray head of the automatic medicine feeding device.
Optionally, in the integrated elution apparatus for heavy metal contaminated soil, the high-efficiency elution reaction module further includes an ultrasonic oscillator for promoting separation of heavy metal contaminants from soil, wherein:
the ultrasonic oscillator is arranged on the outer side of the bottom end of the leaching reaction box;
the ultrasonic oscillator is set in a light pollution vibration mode, a medium pollution vibration mode and a heavy pollution vibration mode;
when the automatic drug delivery device starts a light drug delivery mode, a moderate drug delivery mode or a heavy drug delivery mode, the ultrasonic oscillator simultaneously starts a corresponding light pollution vibration mode, a moderate pollution vibration mode or a heavy pollution vibration mode.
Optionally, in the heavy metal contaminated soil integrated leaching device, the high-efficiency screening and filter-pressing module receives the remediated soil and the waste liquid discharged from the high-efficiency leaching reaction module, screens and filter-presses the remediated soil to separate solid from liquid, and performs sewage treatment after discharging the waste liquid;
the efficient screening and filter-pressing module comprises an efficient screening device and a plate-and-frame filter press;
the high-efficiency screening device discharges the soil with the grain diameter larger than the specified grain diameter as purified soil, and the soil with the grain diameter smaller than the specified grain diameter is conveyed to a plate-and-frame filter press;
the plate-and-frame filter press carries out filter pressing dehydration on the soil.
The utility model discloses based on the following insight of inventor, the inventor finds through the research that the main reason that the washing separation effect is not good of current soil washing technique is that in soil size screening link, do not carry out effective separation to soil particles according to the particle diameter, cause the equipment productivity to be lower; in the leaching and separating link of the heavy metal pollutants, the amount of the polluted soil and the adding proportion of the medicament cannot reach the optimal degree, so that the waste or the deficiency of the use of the medicament is caused; in addition, the polluted soil and the leaching agent are not uniformly mixed, so that the leaching and separating effect on high-concentration pollutants is poor. The combination of these disadvantages results in a less effective final cleaning separation.
Based on the above insight, the utility model provides an integrated drip washing equipment of modified heavy metal contaminated soil: on the first aspect, the high-efficiency size fraction screening module is used for carrying out size fraction screening on the polluted soil so as to separate the soil with the particle size smaller than the specified particle size, and the soil is input into the high-efficiency leaching reaction module, so that the effective separation of soil particles can be realized, the soil restoration amount is reduced, and the equipment productivity is improved; in the second aspect, the high-efficiency leaching reaction module is used for setting a dosing mode according to the concentration of the heavy metal pollutants and dosing according to the dosing mode, so that a better effect of the contaminated soil amount and the dosing proportion of the medicament is achieved, and the waste or the shortage of the use of the medicament is avoided; in the third aspect, in the leaching process, the contaminated soil and the leaching agent are uniformly mixed and reacted through efficient stirring and ultrasonic oscillation, so that the leaching and separation of heavy metal pollutants are promoted; in the fourth aspect, the soil discharged from the high-efficiency leaching reaction module is screened and filter-pressed by the high-efficiency precipitation filter-pressing module, so that the high-efficiency output of the restored soil is realized. The adoption of the technical means greatly improves the cleaning and separating effect and efficiency of the whole equipment, has high automation degree, avoids unnecessary manual intervention, realizes the integration of multiple functions through the high-efficiency grain size screening module, the high-efficiency grain size screening module and the high-efficiency precipitation filter pressing module, simplifies the treatment link of the whole process relative to the prior art, reduces the cost and increases the feasibility of the operation.
Drawings
FIG. 1 is a schematic view of an integrated leaching device for heavy metal contaminated soil according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a high-efficiency size fraction screening module according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a high-efficiency leaching reaction module according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a stirring gear and a screw device according to an embodiment of the present invention.
Detailed Description
The following describes the heavy metal contaminated soil integrated leaching apparatus in detail with reference to the accompanying drawings and specific examples. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
Furthermore, features in different embodiments of the invention may be combined with each other, unless otherwise specified. For example, a feature of the second embodiment may be substituted for a corresponding or functionally equivalent or similar feature of the first embodiment, and the resulting embodiments are likewise within the scope of the disclosure or recitation of the present application.
The utility model discloses a core thought lies in providing an integrated drip washing equipment of heavy metal contaminated soil to solve the current drip washing equipment that is used for heavy metal contaminated soil repair inefficiency, artifical big problem of participation degree.
The utility model aims to screen the polluted soil efficiently, reduce the polluted soil and improve the productivity; secondly, by intelligent quantitative administration, the medicament is put into the polluted soil in the optimal proportion, and the utilization rate of the medicament is improved. And thirdly, by adding an efficient ultrasonic oscillator, the contaminated soil is promoted to be uniformly mixed with the leacheate, and the pollutant leaching and separating effect is improved.
The utility model discloses an elution link has been simplified to the integrated drip washing equipment of heavy metal contaminated soil, and this equipment can carry out high-efficient grain level screening, intelligent dosing drip washing reaction, and the high efficiency promotes the pollutant separation.
In order to realize the above idea, the utility model provides an integrated drip washing equipment of heavy metal contaminated soil, as shown in fig. 1, include: the efficient size fraction screening module 100 is configured to perform size fraction screening on the contaminated soil to separate out soil with a particle size smaller than a specified particle size for inputting into the efficient leaching reaction module 200; the efficient leaching reaction module 200 is configured to add chemicals according to the concentration of the heavy metal pollutants, and uniformly mix and react the polluted soil and leaching agents through efficient stirring and ultrasonic oscillation to promote leaching and separation of the heavy metal pollutants; and a high-efficiency precipitation filter-pressing module 300 configured to screen and filter-press the soil discharged from the high-efficiency leaching reaction module 200.
Aiming at the problem of poor screening effect of the existing soil, the heavy metal contaminated soil integrated leaching equipment provided by the utility model comprises a high-efficiency size grading screening module, wherein the high-efficiency size grading screening module is used for carrying out size grading screening on the contaminated soil so as to separate the soil with the particle size smaller than the specified particle size and enter a high-efficiency leaching reaction module; the soil leaching amount is reduced, and the equipment productivity is improved.
Specifically, the high-efficiency size grading screening module realizes the functions of high-efficiency size grading screening and reduction of the polluted soil. After the polluted soil enters the high-efficiency particle size screening unit, coarse particles with the particle size larger than the specified particle size can be directly backfilled through the multi-stage hydraulic vibration screen, and the coarse particles with the particle size smaller than the specified particle size enter the high-efficiency leaching reaction module, as shown in fig. 2, the high-efficiency particle size screening module comprises a feed hopper 21 and a high-efficiency multi-stage screening machine. Soil is put into from a feeding hole 22, a group of gear rollers 23 are arranged in the feeding hopper 21, the feeding hopper 21 intercepts or crushes coarse particles or stones with the particle size larger than 100mm through the gear rollers 23, the distance between the gear shafts is 100mm, the soil is fed in the rotary crushing process, the soil is prevented from being adhered to the wall of the feeding hopper 21 to cause soil blockage, then the soil enters the high-efficiency multi-stage screening machine from a feeding hole 24 to be subjected to multi-stage hydraulic screening, the high-efficiency multi-stage screening machine comprises a screening motor (not shown in the figure) for driving a screening vibrator, a screening vibrator (not shown in the figure) for driving each layer of filter screen to vibrate, a screening box 28, a screening and flushing device (not shown in the figure) for flushing the material on each layer of filter screen, and screens, wherein the screens are respectively provided with 3 layers of filter screens from top to bottom, the screening machine comprises a first layer of screen 25, a second layer of screen 26 and a third layer of screen 27, the first layer of screen 25, The second screen 26 and the third screen 27 have screen mesh diameters of 50mm, 10mm and 2mm, respectively, and a conveyor belt such as the first conveyor belt 29, the second conveyor belt 20 and the third conveyor belt 211 shown in fig. 2 is disposed at the end of each screen mesh, so that the particles that cannot pass through the corresponding screen mesh are conveyed by the first conveyor belt 29, the second conveyor belt 20 and the third conveyor belt 211, and the soil that has passed through all the 3 screen meshes is discharged from the discharge port 212.
As shown in fig. 1, 4 materials with different particle sizes, namely, a material with a particle size larger than 50mm, a material with a particle size 50mm to 10mm, a material with a particle size 10mm to 2mm and a material with a particle size smaller than 2mm, can be efficiently separated by 3 layers of filter screens of the efficient size fraction screening module 100, and the 4 materials with different particle sizes are detected, if the detection is qualified, the 3 materials, namely the material with a particle size larger than 50mm, the material with a particle size 50mm to 10mm and the material with a particle size 10mm to 2mm, can be recycled as aggregate and the like, and the material with a particle size smaller than 2mm can be backfilled; if the detection is unqualified, returning the materials larger than 50mm, 50 mm-10 mm and 10 mm-2 mm to the high-efficiency size fraction screening module 100 for washing, continuing to detect after washing, and entering the high-efficiency leaching reaction module 200 for leaching reaction when the materials smaller than 2 mm.
Aiming at the problem that the dosage of the polluted soil and the dosage proportion of the medicament cannot reach the optimal condition often in the leaching separation link of the heavy metal pollutants, so that the medicament is wasted or insufficient, the high-efficiency leaching reaction module is provided with a mild administration mode, a moderate administration mode and a severe administration mode through an automatic dosing device, and the effect that the dosage of the polluted soil and the dosage proportion of the medicament reach the better condition is realized. Aiming at the problem that the contaminated soil and the leaching agent are not uniformly mixed and react to cause poor leaching and separating effects on high-concentration pollutants, the efficient leaching reaction module realizes the sufficient stirring of the agent and the soil by arranging two groups of stirring gears and one group of screw devices.
And the high-efficiency leaching reaction module realizes leaching by adding a medicament in a corresponding mode according to the detection result of the concentration of the heavy metal pollutants, and promotes the leaching and separation of the pollutants through high-efficiency stirring and ultrasonic oscillation. As shown in fig. 3, the high-efficiency leaching reaction module includes a leaching reaction tank 32, a feed inlet 31, an automatic chemical feeding device 33, two sets of stirring gears 34, a set of screw devices 35, a stirring motor 36, a speed reducer 37, a suspension-type level gauge 311, a discharge port 30, an ultrasonic oscillator 38, and a tank bracket 39 for supporting the leaching reaction tank. After screening, the soil material with the thickness less than 2mm enters the leaching reaction box 32 through the feeding hole 31, the automatic dosing device 33 can be set with a light dosing mode, a medium dosing mode, a heavy dosing mode and other dosing modes, the light dosing mode, the medium dosing mode and the heavy dosing mode respectively correspond to the pollution gradient divided according to the concentration of the heavy metal pollutants, and the dosing mode corresponding to the dosing device is started according to the pollution gradient interval where the soil material detection result with the thickness less than 2mm is located. The stirring motor 36 is connected with a speed reducer, and the speed reducer 37 drives the stirring gear and the main shaft of the screw device to rotate.
As shown in fig. 4, two sets of stirring gears 45 and one set of screw devices are respectively arranged in the leaching reaction tank from top to bottom, and the stirring gears 34 are arranged at the upper part of the leaching reaction tank in a staggered manner and are used for fully stirring the medicament and the soil; a main shaft of the spiral device 35 is arranged at the bottom in the leaching reaction box, and a spiral blade 351 is arranged on the main shaft 352 and moves spirally by the action of the main shaft so as to push the stirred soil to a discharge hole 30 of the leaching reaction box; a plurality of stirring rods 353 are welded on the spiral blades and stir the soil in the pushing process; the stirring motor drives the speed reducer, so that the speed reducer drives the stirring gear and the main shaft of the screw device to rotate. The discharge hole of the leaching reaction box is arranged on the side wall of the bottom of the leaching reaction box and is positioned at the tail end of the spiral main shaft. The discharge port 30 is arranged at the lower part of the tail part of the box body, after the soil and the medicament are fully mixed and reacted, the discharge port 30 is opened, and the polluted soil is pushed by a group of screw devices at the lowest end to be discharged from the discharge port 30.
The bottom of the suspension type liquid level meter 311 is arranged in the leaching reaction box 32 and is used for measuring the liquid level in the leaching reaction box in real time, wherein: the suspension type liquid level meter comprises a suspension module, a rigid connecting device and a top switch; the suspension module is placed in the leaching reaction box and changes position along with the lifting of the liquid level; the rigid connecting device transmits a position signal of the suspension module to the top switch; the top switch controls the spray head of the automatic dosing device to be opened or closed; when the liquid level in the leaching reaction box rises to reach a threshold value, the rigid connection device pulls up the top switch due to the rising of the suspension module, and the top switch closes the spray head of the automatic dosing device, so that dosing is stopped; when liquid in the leaching reaction box is discharged and the liquid level drops, the rigid connection device pulls down the top switch due to the lowering of the suspension module, and the top switch opens the spray head of the automatic medicine feeding device.
The ultrasonic oscillator 38 is arranged on the outer side of the bottom of the leaching reaction box body 32 to promote the separation of heavy metal pollutants from the soil framework. The ultrasonic oscillator 38 is internally provided with a light pollution vibration mode, a medium pollution vibration mode and a heavy pollution vibration mode, the ultrasonic oscillator 38 and the automatic drug delivery device 33 are in communication connection or electric connection and can be linked with each other, and when the automatic drug delivery device 33 starts the corresponding light drug delivery mode, medium drug delivery mode and heavy drug delivery mode, the ultrasonic oscillator 38 also starts the corresponding light pollution vibration mode, medium pollution vibration mode and heavy pollution vibration mode.
Further, as shown in fig. 1, the high efficiency screening and filter-pressing module 300 receives the restored soil and waste liquid discharged from the high efficiency leaching reaction module 200, and performs screening and filter-pressing to separate solid from liquid, the soil is temporarily stored for inspection, and the waste liquid is discharged to enter the subsequent sewage treatment. The high-efficiency screening and filter-pressing module 300 comprises a high-efficiency screening device and a plate-and-frame filter press. The high-efficiency screening device takes the specified particle size as a reference, the purified soil is discharged when the particle size is larger than the specified particle size, the purified soil is subjected to filter pressing and dehydration when the particle size is smaller than the specified particle size, the dehydrated soil can be temporarily stored for acceptance check for the purified soil, and the wastewater is discharged for subsequent sewage treatment.
The utility model discloses following beneficial effect has:
1. in the aspect of production efficiency, the polluted soil is efficiently reduced through the efficient particle size screening module, and the remediation efficiency is improved.
2. In the aspect of the medicament feeding cost, intelligent quantitative administration can be carried out according to the content of pollution pollutants in soil, the waste of medicament use is avoided, and the medicament feeding cost is saved.
3. In the aspect of leaching effect, the effect of uniformly mixing the contaminated soil and the leaching solution is realized by adding high-efficiency vibration and ultrasonic oscillation, so that the leaching separation of pollutants in the soil is promoted, and the leaching effect is improved.
In summary, the above embodiments have described in detail different configurations of the integrated leaching apparatus for heavy metal contaminated soil, and of course, the present invention includes but is not limited to the configurations listed in the above embodiments, and any content that is changed based on the configurations provided by the above embodiments is within the protection scope of the present invention. One skilled in the art can take the contents of the above embodiments to take a counter-measure.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.
Claims (10)
1. The utility model provides an integrated drip washing equipment of heavy metal contaminated soil which characterized in that includes:
the high-efficiency grain size screening module is connected with the high-efficiency leaching reaction module to screen the contaminated soil in a grain size manner to remove coarse grains and supply the contaminated soil to the high-efficiency leaching reaction module;
the high-efficiency leaching reaction module is used for adding medicine to leach, stirring and ultrasonically oscillating the polluted soil so as to promote the separation of pollutants;
the high-efficiency precipitation filter-pressing module is connected with the high-efficiency leaching reaction module so as to screen and filter-press the soil discharged by the high-efficiency precipitation filter-pressing module.
2. The integrated leaching apparatus for heavy metal contaminated soil according to claim 1, wherein the high efficiency size fraction screening module comprises:
the feeding hopper is used for conveying soil to the high-efficiency multistage screening machine, and the gear roller is arranged below the feeding port to crush coarse particles or stones in the soil;
the efficient multi-stage screening machine is used for carrying out multi-stage hydraulic screening on soil to form large materials, medium materials, small materials and minimum materials respectively, and conveying the minimum materials to the efficient leaching reaction module.
3. The integrated leaching equipment for heavy metal contaminated soil according to claim 2, wherein the high-efficiency hydraulic multistage sieving machine comprises:
the top of the screening box is opposite to a feed opening of the feed hopper, and the bottom of the screening box is a discharge opening; 3 layers of filter screens are respectively arranged in the screening box from top to bottom, the diameters of the filter screens are respectively 50mm, 10mm and 2mm, and a conveying belt is arranged at the tail end of each layer of filter screen to convey screened corresponding size fraction particles;
the screening and washing device washes materials on each layer of filter screen;
the screening vibrator drives each layer of filter screen to vibrate;
the screening motor drives the screening vibrator.
4. The integrated leaching apparatus for heavy metal contaminated soil according to claim 3, further comprising a first detection module and a second detection module, wherein:
the first detection module detects large materials, medium materials and small materials, and if the large materials, the medium materials and the small materials are qualified in detection, the large materials, the medium materials and the small materials are used as aggregates for resource utilization; if the detection is unqualified, returning the large materials, the medium materials and the small materials to the high-efficiency size fraction screening module for washing;
the second detection module detects the extremely small materials, and if the extremely small materials are detected to be qualified, the extremely small materials are backfilled; and if the detection is unqualified, the extremely small materials enter the high-efficiency leaching reaction module for leaching reaction.
5. The integrated leaching equipment for heavy metal contaminated soil according to claim 4, wherein the high-efficiency leaching reaction module comprises a leaching reaction box, and a feeding hole and a dosing hole are formed in the top of the leaching reaction box;
the automatic dosing device comprises a medicament tank, a pipeline and a spray head, and the spray head enters the leaching reaction box from the dosing hole;
the leaching reaction box plays a supporting role for the medicament tank;
the box body bracket plays a supporting role in the leaching reaction box.
6. The integrated leaching apparatus for heavy metal contaminated soil according to claim 5,
the second detection module detects the extremely small materials, and the detection result comprises the concentration of light heavy metal pollutants, the concentration of moderate heavy metal pollutants and the concentration of heavy metal pollutants;
according to the concentration of the mild heavy metal pollutants, the concentration of the moderate heavy metal pollutants and the concentration of the severe heavy metal pollutants, the automatic dosing device is respectively provided with a mild dosing mode, a moderate dosing mode and a severe dosing mode;
the tiny materials enter through a feed inlet of the leaching reaction box;
and starting the automatic dosing device according to the dosing mode corresponding to the concentration of the heavy metal pollutants.
7. The integrated leaching apparatus for heavy metal contaminated soil according to claim 5, wherein the high efficiency leaching reaction module further comprises a plurality of sets of stirring gears, a set of screw devices, a stirring motor and a speed reducer, wherein:
the stirring gears are arranged at the upper part in the leaching reaction box in a staggered manner and are used for fully stirring the medicament and the soil;
a main shaft of the spiral device is arranged at the bottom in the leaching reaction box, and a spiral blade is arranged on the main shaft and is driven by the main shaft to perform spiral motion so as to push the stirred soil to a discharge hole of the leaching reaction box;
a plurality of stirring rods are welded on the spiral blades and stir the soil in the pushing process;
the stirring motor drives the speed reducer, so that the speed reducer drives the stirring gear and the main shaft of the screw device to rotate;
the discharge hole of the leaching reaction box is arranged on the side wall of the bottom of the leaching reaction box and is positioned at the tail end of the spiral main shaft.
8. The integrated leaching apparatus for heavy metal contaminated soil according to claim 5, wherein the high efficiency leaching reaction module further comprises a suspension type liquid level meter for measuring the liquid level in the leaching reaction tank in real time, wherein:
the suspension type liquid level meter comprises a suspension module, a rigid connecting device and a top switch;
the suspension module is placed in the leaching reaction box and changes position along with the lifting of the liquid level;
the rigid connecting device transmits a position signal of the suspension module to the top switch;
the top switch controls the spray head of the automatic dosing device to be opened or closed;
when the liquid level in the leaching reaction box rises to reach a threshold value, the rigid connection device pulls up the top switch due to the rising of the suspension module, and the top switch closes the spray head of the automatic dosing device, so that dosing is stopped;
when liquid in the leaching reaction box is discharged and the liquid level drops, the rigid connection device pulls down the top switch due to the lowering of the suspension module, and the top switch opens the spray head of the automatic medicine feeding device.
9. The integrated elution apparatus for heavy metal contaminated soil as claimed in claim 6, wherein the high efficiency elution reaction module further comprises an ultrasonic oscillator for facilitating separation of heavy metal contaminants from the soil, wherein:
the ultrasonic oscillator is arranged on the outer side of the bottom end of the leaching reaction box;
the ultrasonic oscillator is set in a light pollution vibration mode, a medium pollution vibration mode and a heavy pollution vibration mode;
when the automatic drug delivery device starts a light drug delivery mode, a moderate drug delivery mode or a heavy drug delivery mode, the ultrasonic oscillator simultaneously starts a corresponding light pollution vibration mode, a moderate pollution vibration mode or a heavy pollution vibration mode.
10. The integrated leaching equipment for heavy metal contaminated soil according to claim 1, wherein the high-efficiency screening and filter-pressing module receives the remediated soil and waste liquor discharged from the high-efficiency leaching reaction module, screens and filter-presses the remediated soil to separate solid from liquid, and performs sewage treatment after discharging the waste liquor;
the efficient screening and filter-pressing module comprises an efficient screening device and a plate-and-frame filter press;
the high-efficiency screening device discharges the soil with the grain diameter larger than the specified grain diameter as purified soil, and the soil with the grain diameter smaller than the specified grain diameter is conveyed to a plate-and-frame filter press;
the plate-and-frame filter press carries out filter pressing dehydration on the soil.
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| CN114029330A (en) * | 2021-11-16 | 2022-02-11 | 吴海浪 | Intelligent soil remediation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114029330A (en) * | 2021-11-16 | 2022-02-11 | 吴海浪 | Intelligent soil remediation system |
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