CN112588806A - Integrated high-efficiency leaching equipment for heavy metal contaminated soil - Google Patents
Integrated high-efficiency leaching equipment for heavy metal contaminated soil Download PDFInfo
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- CN112588806A CN112588806A CN202011564686.9A CN202011564686A CN112588806A CN 112588806 A CN112588806 A CN 112588806A CN 202011564686 A CN202011564686 A CN 202011564686A CN 112588806 A CN112588806 A CN 112588806A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/26—Permeable casings or strainers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention provides integrated high-efficiency leaching equipment for heavy metal contaminated soil, which comprises: the efficient size fraction screening module is configured to perform efficient size fraction screening on the polluted soil so as to separate the soil with the size smaller than a specified size for inputting into the efficient leaching reaction module, and the function of reducing leaching repair amount is realized; the high-efficiency leaching reaction module is configured to add a medicament in a corresponding mode according to the detection result of the concentration of the heavy metal pollutants for leaching, and has the function of promoting the leaching and separation of the pollutants through high-efficiency stirring and ultrasonic oscillation; and the high-efficiency precipitation filter-pressing module is configured to screen and filter-press the soil discharged by the high-efficiency leaching reaction module.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to integrated efficient leaching equipment for 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.
Disclosure of Invention
The invention aims to provide integrated high-efficiency leaching equipment for heavy metal contaminated soil, and solves the problems that the existing leaching equipment for heavy metal contaminated soil is low in repairing efficiency and large in artificial participation degree.
In order to solve the technical problem, the invention provides an integrated high-efficiency leaching device for heavy metal contaminated soil, which comprises:
the efficient particle size screening module is configured to screen the polluted soil in a particle size mode so as to separate the soil with the particle size smaller than the specified particle size and input the soil into the efficient leaching reaction module;
the high-efficiency leaching reaction module is configured to set a dosing mode according to the concentration of the heavy metal pollutants, carry out dosing leaching according to the dosing mode, and promote the separation of the pollutants through full stirring and ultrasonic oscillation; and
and the high-efficiency precipitation filter-pressing module is configured to screen and filter-press the soil discharged by the high-efficiency leaching reaction module.
Optionally, in the integrated high-efficiency leaching apparatus 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 inlet so as to crush coarse particles or stones larger than 100mm in the soil;
the efficient multi-stage sieving machine is used for carrying out multi-stage hydraulic sieving on soil to respectively form materials larger than 50mm, 50 mm-10 mm, 10 mm-2 mm and materials smaller than 2mm, and conveying the materials smaller than 2mm to the efficient leaching reaction module.
Optionally, in the integrated high-efficiency leaching apparatus for heavy metal contaminated soil, the high-efficiency multistage hydraulic 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 is used for washing the materials on each layer of filter screen;
the screening vibrator is used for driving each layer of filter screen to vibrate;
and the screening motor is used for driving the screening vibrator.
Optionally, the integrated high-efficiency leaching apparatus for heavy metal contaminated soil further includes a first detection module and a second detection module, wherein:
the first detection module detects materials larger than 50mm, 50 mm-10 mm and 10 mm-2 mm, and if the materials are qualified, the materials larger than 50mm, 50 mm-10 mm and 10 mm-2 mm are used as aggregates for resource utilization; if the detection is not qualified, the materials larger than 50mm, 50 mm-10 mm and 10 mm-2 mm return to the high-efficiency size fraction screening module for washing.
The second detection module detects the materials smaller than 2mm, and if the materials smaller than 2mm are detected to be qualified, backfilling the materials smaller than 2 mm; and if the detection is unqualified, feeding the material with the size less than 2mm into the high-efficiency leaching reaction module for leaching reaction.
Optionally, in the integrated high-efficiency leaching equipment for heavy metal contaminated soil, the high-efficiency leaching reaction module comprises a leaching reaction box, and a feed inlet 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.
Optionally, in the integrated efficient leaching equipment for heavy metal contaminated soil, the detection result of the second detection module on the material smaller than 2mm 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 material with the diameter less than 2mm enters a leaching reaction box through a feed inlet;
and starting the automatic dosing device according to the dosing mode corresponding to the concentration of the heavy metal pollutants.
Optionally, in the integrated high-efficiency leaching device for heavy metal contaminated soil, the high-efficiency leaching 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, the integrated high-efficiency leaching equipment for the heavy metal contaminated soil is used, the high-efficiency leaching reaction module further comprises a suspension type liquid level meter 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.
Optionally, in the integrated high-efficiency leaching apparatus for heavy metal contaminated soil, the high-efficiency leaching reaction module further includes an ultrasonic oscillator, which is configured to promote 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 integrated high-efficiency leaching equipment for heavy metal contaminated soil, the high-efficiency screening and filter-pressing module receives the remediated soil and the waste liquid discharged by the high-efficiency leaching reaction module, screens and filter-presses the remediated soil to separate solid from liquid, and discharges the waste liquid to perform sewage treatment;
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.
Based on the following insights of the inventor, the inventor finds that the main reason that the cleaning and separating effect is poor due to the existing soil leaching technology is that soil particles are not effectively separated according to the particle size in the soil size screening link, 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. The combination of these disadvantages results in a less effective final cleaning separation.
Based on the above insights, the invention provides an improved integrated high-efficiency leaching device for heavy metal contaminated soil, which comprises: 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 diagram of an integrated high-efficiency leaching device for heavy metal contaminated soil according to an embodiment of the 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 integrated high-efficiency leaching equipment for heavy metal contaminated soil provided by the invention is further described in detail with reference to the accompanying drawings and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Furthermore, features from different embodiments of the invention may be combined with each other, unless otherwise indicated. 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 core idea of the invention is to provide an integrated high-efficiency leaching device for heavy metal contaminated soil, so as to solve the problems of low repair efficiency and large manual participation degree of the existing leaching device for heavy metal contaminated soil.
The invention aims to efficiently screen the polluted soil, 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 integrated high-efficiency leaching equipment for the heavy metal contaminated soil provided by the invention simplifies the leaching link, can be used for performing high-efficiency particle size screening and intelligent quantitative dosing leaching reaction, and can be used for efficiently promoting the separation of pollutants.
In order to realize the idea, the invention provides an integrated high-efficiency leaching device for heavy metal contaminated soil, as shown in fig. 1, comprising: 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 integrated high-efficiency leaching equipment for the heavy metal contaminated soil provided by the invention 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, 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 2 mm; 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 invention has the following beneficial effects:
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 describe in detail different configurations of the integrated efficient leaching apparatus for heavy metal contaminated soil, and it goes without saying that the present invention includes but is not limited to the configurations listed in the above embodiments, and any modifications made on the basis of the configurations provided in the above embodiments are within the 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 purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. The utility model provides a high-efficient drip washing equipment of integrated form for heavy metal contaminated soil which characterized in that includes:
the efficient particle size screening module is configured to screen the polluted soil in a particle size mode so as to separate the soil with the particle size smaller than the specified particle size and input the soil into the efficient leaching reaction module;
the high-efficiency leaching reaction module is configured to set a dosing mode according to the concentration of the heavy metal pollutants, carry out dosing leaching according to the dosing mode, and promote the separation of the pollutants through full stirring and ultrasonic oscillation; and
and the high-efficiency precipitation filter-pressing module is configured to screen and filter-press the soil discharged by the high-efficiency leaching reaction module.
2. The integrated high-efficiency 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 inlet so as to crush coarse particles or stones larger than 100mm in the soil;
the efficient multi-stage sieving machine is used for carrying out multi-stage hydraulic sieving on soil to respectively form materials larger than 50mm, 50 mm-10 mm, 10 mm-2 mm and materials smaller than 2mm, and conveying the materials smaller than 2mm to the efficient leaching reaction module.
3. The integrated high-efficiency leaching equipment for heavy metal contaminated soil according to claim 2, wherein the high-efficiency hydraulic multi-stage 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 is used for washing the materials on each layer of filter screen;
the screening vibrator is used for driving each layer of filter screen to vibrate;
and the screening motor is used for driving the screening vibrator.
4. The integrated high-efficiency 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 materials larger than 50mm, 50 mm-10 mm and 10 mm-2 mm, and if the materials are qualified, the materials larger than 50mm, 50 mm-10 mm and 10 mm-2 mm are used as aggregates for resource utilization; if the detection is not qualified, the materials larger than 50mm, 50 mm-10 mm and 10 mm-2 mm return to the high-efficiency size fraction screening module for washing.
The second detection module detects the materials smaller than 2mm, and if the materials smaller than 2mm are detected to be qualified, backfilling the materials smaller than 2 mm; and if the detection is unqualified, feeding the material with the size less than 2mm into the high-efficiency leaching reaction module for leaching reaction.
5. The integrated high-efficiency leaching device for heavy metal contaminated soil according to claim 4, wherein the high-efficiency leaching reaction module comprises a leaching reaction box, and a feed inlet 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 high-efficiency leaching equipment for heavy metal contaminated soil according to claim 5,
the detection result of the second detection module on the material smaller than 2mm comprises the concentration of the light heavy metal pollutants, the concentration of the moderate heavy metal pollutants and the concentration of the 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 material with the diameter less than 2mm enters a leaching reaction box through a feed inlet;
and starting the automatic dosing device according to the dosing mode corresponding to the concentration of the heavy metal pollutants.
7. The integrated high-efficiency leaching equipment 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 high-efficiency leaching device 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 high efficiency leaching apparatus for heavy metal contaminated soil according to claim 6, wherein said high efficiency leaching reaction module further comprises an ultrasonic oscillator for facilitating the 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 high-efficiency leaching equipment for the soil polluted by the heavy metals according to claim 1, wherein the high-efficiency screening and filter-pressing module receives the restored soil and the waste liquid discharged by the high-efficiency leaching reaction module, screens and filter-presses the restored soil to separate solid from liquid, and discharges the waste liquid for sewage treatment;
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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| CN113996645A (en) * | 2021-10-29 | 2022-02-01 | 诺维环境工程技术徐州有限公司 | A medicament development equipment that is used for non ferrous metal mine heavy metal pollution source to administer |
| CN115228911A (en) * | 2022-06-22 | 2022-10-25 | 中国化学工程重型机械化有限公司 | Pollute soil restoration with drip washing test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112588806B (en) | 2022-08-12 |
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