CN110420988B - Heavy metal contaminated soil remediation method - Google Patents
Heavy metal contaminated soil remediation method Download PDFInfo
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- CN110420988B CN110420988B CN201910731939.8A CN201910731939A CN110420988B CN 110420988 B CN110420988 B CN 110420988B CN 201910731939 A CN201910731939 A CN 201910731939A CN 110420988 B CN110420988 B CN 110420988B
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- box body
- roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/04—Jaw crushers or pulverisers with single-acting jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
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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
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
Abstract
The invention relates to the technical field of soil treatment, in particular to a heavy metal soil remediation method; the soil extruder used in the invention comprises a cam, a pressing plate, a second filter screen, a second push rod, a push plate, a pressing block, a squeezing plate, a roller, a scraper and a cleaning plate, wherein the pressing plate is driven by the movement of the cam to extrude soil for the first time, and then the second filter screen pushes the second push rod, so that the push plate extrudes the soil for the second time, the diameter of soil particles after multiple times of extrusion is smaller, the combination of leacheate is facilitated, and the repair efficiency can be improved; meanwhile, the roller, the scraper and the cleaning plate can improve the efficiency of the pressing block for extruding soil, and can also clean the soil residue left on the surface of the pressing block and the soil residue in the roller cavity, so that the roller cannot be blocked by the soil residue, the stability of the invention is improved, and the soil remediation efficiency is further improved.
Description
Technical Field
The invention relates to the technical field of soil treatment, in particular to a method for restoring heavy metal contaminated soil.
Background
Heavy metals in the heavily polluted pollutants are main pollution sources; due to human activities, the content of trace metal elements in soil exceeds a background value, excessive deposition causes the content of heavy metals in the soil to be too high, and the soil is polluted by the heavy metals; the heavy metal is metal with the specific gravity equal to or more than 5.0, and mainly comprises elements with obvious biological toxicity such as cadmium, mercury, lead, chromium, metalloid arsenic and the like, and elements with certain toxicity such as zinc, copper, nickel and the like; the pollution elements mainly come from pesticides, waste water, sludge, atmospheric sedimentation and the like, for example, cadmium and lead pollution mainly comes from smelting emission and automobile waste gas sedimentation, mercury mainly comes from mercury-containing waste water, and arsenic is largely used as an insecticide, a bactericide, a rodenticide and a herbicide; excessive heavy metal can cause physiological dysfunction and nutritional disorder of plants, the enrichment coefficient of elements such as cadmium, mercury and the like in crop seeds is higher, even if the enrichment coefficient exceeds the food sanitation standard, the growth, development and yield of crops are not influenced, and in addition, mercury and arsenic can weaken and inhibit the activities of nitrifying and ammonifying bacteria in soil and influence the nitrogen supply.
The heavy metal pollutants have small mobility in the soil, are not degraded by microorganisms, and have great potential harm after entering a human body through a food chain; in some mines, a stone dumping site and a tailing pond are not established in the process of mining, waste stones and tailings are randomly stacked, so that heavy metals which are rich in difficult to solve enter soil, and in addition, the residual metal waste residues after ore processing enter an underground water system along with rainwater, so that serious heavy metal pollution of the soil is caused; there are 10 metal elements really classified into heavy metals industrially: copper, lead, zinc, tin, nickel, cobalt, antimony, mercury, cadmium and bismuth; from the perspective of the soil-plant system, the international academy considers that only cadmium, cobalt, selenium and other elements cause the greatest risk to animal and human health; the major health risks to humans due to the food chain are cadmium and selenium.
The current mainstream repairing method is a chemical method, the aim of repairing soil is achieved by leaching the soil, and in the prior art, in the leaching process, leaching liquor cannot well permeate into soil blocks to clean heavy metal pollutants due to overlarge soil particles, so that the leaching effect is poor; in view of the above, the invention provides a heavy metal contaminated soil remediation method.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a heavy metal contaminated soil remediation method, which can be used for enabling the leacheate to be in contact with the soil more fully for remediation by increasing the contact area of the contaminated soil and the leacheate.
The technical scheme adopted by the invention for solving the technical problems is as follows: a heavy metal contaminated soil remediation method comprises the following steps:
s1: excavating polluted soil, primarily screening the excavated soil to remove garbage, glass fragments and organic residues mixed in the soil, and crushing overlarge soil blocks;
s2: placing the soil primarily screened in the S1 into a soil extruder for extrusion, so that the soil is changed into fine grains from coarse grains, and mixing and stirring the fine grains after extrusion and leacheate;
s3: extracting and standing the mixture of the soil and the leacheate mixed and stirred in the S2, separating pollutants in the soil in a solid-liquid separation mode, and backfilling the treated soil or transporting the soil to other places needing the soil;
the soil extruder used in the S2 process comprises a box body, a feeding hole and a discharging hole; the feeding hole is positioned at the top of the box body and communicated with the box body, a T-shaped plate is arranged at the bottom of the feeding hole and is in contact with the bottom of the feeding hole, a square plate is arranged at the bottom of the T-shaped plate, and the square plate is fixedly connected with the T-shaped plate; a cam is arranged in the square plate and connected with a motor, and the rotation of the cam can drive the square plate to move left and right; pressing plates are arranged on two sides of the square plate, the square plate is connected with the pressing plates through a first push rod, and the first push rod is hinged with the square plate; a pressing block is arranged on one side of the pressing plate close to the inner wall of the box body and fixedly connected with the box body; a first filter screen is arranged between the pressing block and the pressing plate, a fixing rod is arranged below the cam, and a second filter screen is fixedly connected below the fixing rod; supporting blocks are arranged at two ends of the second filter screen, sliding grooves are formed in the supporting blocks, two ends of the second filter screen can slide in the sliding grooves, and two ends of the second filter screen are connected with the inner walls of the supporting blocks through springs; a third filter screen is arranged at the bottom of the second filter screen, and the third filter screen is arranged to be conical; the aperture of the first filter screen, the second filter screen and the third filter screen is gradually reduced from top to bottom; when the device works, polluted soil is contacted with the upper surface of the T-shaped plate through the feeding hole, and the soil can be accumulated on the upper surface of the T-shaped plate; when the motor is started, the motor drives the cam to rotate, the rotation of the cam drives the square plate to move left and right, the T-shaped plate fixedly connected with the square plate can slide on the surface of the inner wall of the box body, when the T-shaped plate moves, the polluted soil flows to the position between the pressing plate and the pressing block from the feeding hole, the left and right movement of the square plate can drive the pressing plate to be contacted with the pressing block, so that the polluted soil is extruded into fine particles between the pressing plate and the pressing block, the fine particles can flow to the surface of the second filter screen through the first filter screen, in the continuous extrusion process of the pressing block to the soil, some large particles can pass through the first filter screen in the extrusion process, the second filter screen arranged below the first filter screen can intercept large particles, meanwhile, the fixed rod arranged below the cam can be extruded to move downwards in the rotation process of the cam, and the downward movement of the fixed rod can drive the second filter screen to move downwards, through spring coupling between No. two filter screens and the backup pad, No. two filter screens can rebound under the reset action of spring after moving one section down, thereby make No. two filter screens can shake from top to bottom, and then make the tiny granule on No. two filter screens can be quick pass through, the soil block through No. two filter screens flows the next process from the discharge gate through No. three filter screens, the soil block that does not pass through No. three filter screens can flow the both sides of No. three filter screens along the upper surface of No. three filter screens, thereby made the unable next process that flows of large granule soil block, the insufficient probability of leachate and soil contact has been reduced.
Preferably, a connecting rod is arranged below the second filter screen, two sides of the connecting rod are hinged with second push rods, one ends, close to the inner wall of the box body, of the second push rods are fixedly connected with push plates, and limit blocks are arranged above the push plates and fixedly connected with the inner wall of the box body; a flat plate is arranged at the bottom of the push plate and fixedly connected with the inner wall of the box body; a movable plate is arranged on one side of the flat plate close to the inner wall of the box body, the movable plate is hinged with the inner wall of the box body, and the movable plate is connected with the push plate through a steel wire rope; the connecting rod can be driven to move downwards in the downward movement process of the second filter screen, the connecting rod can move downwards through the movement of the push plate on the surface of the flat plate pushed by the second push rod, soil blocks extruded for the first time can fall on the upper surface of the movable plate, the steel wire rope can be tensioned when the push plate moves, the movable plate connected with the steel wire rope can also be tensioned, the push plate completes secondary extrusion on the upper surface of the movable plate on the soil blocks, the push plate can be pulled back along with the upward movement of the second filter screen, the steel wire rope becomes loose in the process of pulling back the push plate, the movable plate is turned downwards due to the loosening of the steel wire rope, the soil blocks located above the movable plate and extruded for the second time can move downwards to flow to the next process through the third filter screen, secondary pressurization is carried out on the soil blocks, so that soil block particles become thinner, the contact area between the soil blocks and leacheate is increased, and the repair effect is improved.
Preferably, one side, close to the inner wall of the box body, of the push plate is provided with a third push rod, the third push rod is connected with the push plate through a spring, one side, close to the inner wall of the box body, of the third push rod is provided with a first extrusion plate and a second extrusion plate, and the first extrusion plate and the second extrusion plate are both hinged with the third push rod through connecting rods; a channel is arranged on one side, close to the inner wall of the box body, of the third filter screen, a fourth filter screen is arranged in the channel, an arc-shaped channel is arranged below the fourth filter screen, and the arc-shaped channel is communicated with the discharge port; the bottom end of the square plate is connected with a push block through a connecting rod, and a cavity is formed between the first filter screen and the second filter screen; when the soil blocks after the secondary extrusion pass through the third filter screen, the soil blocks with large diameters cannot pass through the third filter screen, the soil blocks with large diameters can move downwards to the channel along the third filter screen, and along with the continuous accumulation of the soil blocks, the soil blocks can be extruded to the upper surface of the fourth filter screen, meanwhile, the motion of the push plate can push the motion of a third push rod, the motion of the third push rod can lead a first extrusion plate to move downwards and a second extrusion plate to move upwards, the first extrusion plate moves downwards to extrude soil blocks on the upper surface of a fourth filter screen again, the extruded soil blocks can flow out through the fourth filter screen, meanwhile, large-particle soil blocks on the surface of the second filter screen can be pushed by the push block, the moving soil blocks reach the surface of the second extrusion plate through the cavity, the upward movement of the second extrusion plate can bring the large-diameter soil blocks to the upper surface of the pressing block, and the soil blocks can move downwards along the upper surface of the pressing block to the surface of the first filter screen and are extruded by the pressing block again to obtain the soil blocks meeting the requirements.
Preferably, a disc is arranged above the second extrusion plate, one side of the disc, which is close to the inner wall of the box body, is fixedly connected with a compression bar, and the compression bar is positioned above the second extrusion plate; a sliding block is arranged on one side, away from the inner wall of the box body, of the disc, the sliding block is fixedly connected with the disc through a connecting rod, a square groove is formed above the sliding block and embedded in the box body, and an inclined pressing plate is fixedly connected to one side, away from the inner wall of the box body, of the sliding block; move up under the promotion of No. three push rods when No. two stripper plates, No. two stripper plates are at the rebound in-process with the depression bar contact and promote depression bar upward movement, the depression bar links firmly with the disc, the rotation that shifts up of depression bar can drive the disc, the rotation of disc can drive the connecting rod motion that links firmly on the disc surface, the connecting rod of motion drives the slider and removes in the square groove, the removal of slider drives the ramp plate and removes, the removal of ramp plate can with swash plate surface contact, thereby the clod on swash plate surface can receive the extrusion and become loose effect to play the pretreatment of clod, thereby improve the clod and be extrudeed efficiency.
Preferably, one end of the pressing plate, which is far away from the box body, is provided with a first roller, the first roller is connected with the pressing plate through a rotating shaft, one side of the pressing block, which is close to the pressing plate, is provided with a second roller, the second roller is connected with the pressing block through the rotating shaft, and the first roller and the second roller are arranged in a staggered manner; a scraper is arranged on one side of the pressing plate close to the pressing plate; after the clod fell between clamp plate and briquetting, the clamp plate extrudees the clod under the promotion of push rod No. one, clamp plate surface's gyro wheel and briquetting surface's No. two gyro wheels meshing, make the clod extruded between a gyro wheel and No. two gyro wheels, make the clod granule become more tiny, roll extrusion simultaneously and also be difficult for remaining clod sediment, the scraper blade that sets up simultaneously at clamp plate surface can wash the clod sediment on briquetting surface, thereby reduce the residual amount of clod sediment on briquetting surface, and then make the clod can be more smooth by being extruded into tiny granule.
Preferably, the outer surfaces of the first idler wheel and the second idler wheel are respectively hinged with a group of cleaning plates, and the cleaning plates are respectively connected with the first idler wheel and the second idler wheel through rotating shafts; meanwhile, the other end of the cleaning plate is connected with the outer walls of the first roller and the second roller through springs; when the clamp plate extrudees the clod, the dislocation set of a gyro wheel and No. two gyro wheels makes two gyro wheels all can rotate when extruding the clod, the clearance board that sets up at a gyro wheel and No. two gyro wheel outer walls can be compressed when contacting with the clod, the clearance board that resets of spring is opened when the clearance board does not contact with the clod, the clearance board of opening can clear up the soil cinder on the rotation chamber surface of a gyro wheel and No. two gyro wheels at the rotation in-process of a gyro wheel and No. two gyro wheels, thereby reduce the soil cinder content of rotating the intracavity, avoid appearing the dead condition of card in gyro wheel and No. two gyro wheels, thereby extruded stability has been improved.
The invention has the technical effects and advantages that:
1. according to the heavy metal contaminated soil remediation method provided by the invention, the contaminated soil is extruded for multiple times to reduce the diameter of soil particles under the cooperation of the cam, the pressing plate, the second filter screen, the second push rod and the push plate, so that the leacheate can be fully contacted with the soil to adsorb the contaminants.
2. According to the method for restoring the heavy metal contaminated soil, the first roller, the second roller, the scraper and the cleaning plate are matched to work, so that the pressing plate can be more fully extruded in the soil extruding process, the residual quantity of soil residues on the surface of the pressing plate is reduced, the blocking rate of the first roller and the second roller is reduced, and the extruding stability is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a diagram of the steps of the present invention;
FIG. 2 is a block diagram of the soil compactor of the present invention;
FIG. 3 is a cross-sectional view of the soil compactor of the present invention;
FIG. 4 is an enlarged view of A in FIG. 3;
FIG. 5 is an enlarged view of B in FIG. 3;
FIG. 6 is a view showing the structure of a first roller in the present invention;
in the figure: the device comprises a box body 1, a feeding hole 2, a discharging hole 3, a T-shaped plate 4, a square plate 41, a pushing block 411, a cavity 412, a cam 42, a pressing plate 43, a first roller 431, a scraping plate 432, a cleaning plate 433, a first push rod 44, a pressing block 45, a second roller 451, a first filter screen 46, a fixing rod 47, a second filter screen 48, a supporting block 49, a chute 491, a connecting rod 6, a second push rod 61, a pushing plate 62, a limiting block 63, a flat plate 64, a movable plate 65, a third filter screen 66, a third push rod 7, a first extrusion plate 71, a second extrusion plate 72, a channel 73, a fourth filter screen 74, an arc-shaped channel 75, a disc 8, a pressing rod 81, a sliding block 82, a square groove 83 and an inclined pressing plate 84.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 6, the method for remedying the heavy metal contaminated soil of the present invention comprises the following steps:
s1: excavating polluted soil, primarily screening the excavated soil to remove garbage, glass fragments and organic residues mixed in the soil, and crushing overlarge soil blocks;
s2: placing the soil primarily screened in the S1 into a soil extruder for extrusion, so that the soil is changed into fine grains from coarse grains, and mixing and stirring the fine grains after extrusion and leacheate;
s3: extracting and standing the mixture of the soil and the leacheate mixed and stirred in the S2, separating pollutants in the soil in a solid-liquid separation mode, and backfilling the treated soil or transporting the soil to other places needing the soil;
the soil extruder used in the S2 process comprises a box body 1, a feeding hole 2 and a discharging hole 3; the feeding hole 2 is positioned at the top of the box body 1, the feeding hole 2 is communicated with the box body 1, a T-shaped plate 4 is arranged at the bottom of the feeding hole 2, the T-shaped plate 4 is in contact with the bottom of the feeding hole 2, a square plate 41 is arranged at the bottom of the T-shaped plate 4, and the square plate 41 is fixedly connected with the T-shaped plate 4; a cam 42 is arranged inside the square plate 41, the cam 42 is connected with a motor, and the rotation of the cam 42 can drive the square plate 41 to move left and right; pressing plates 43 are arranged on two sides of the square plate 41, the square plate 41 is connected with the pressing plates 43 through a first push rod 44, and the first push rod 44 is hinged with the square plate 41; a pressing block 45 is arranged on one side of the pressing plate 43 close to the inner wall of the box body 1, and the pressing block 45 is fixedly connected with the box body 1; a first filter screen 46 is arranged between the pressing block 45 and the pressing plate 43, a fixing rod 47 is arranged below the cam 42, and a second filter screen 48 is fixedly connected below the fixing rod 47; supporting blocks 49 are arranged at two ends of the second filter screen 48, a sliding groove 491 is arranged in each supporting block 49, two ends of the second filter screen 48 can slide in the sliding grooves 491, and two ends of the second filter screen 48 are connected with the inner wall of each supporting block 49 through springs; a third filter screen 66 is arranged at the bottom of the second filter screen 48, and the third filter screen 66 is arranged to be conical; the aperture of the first filter screen 46, the second filter screen 48 and the third filter screen 66 is gradually reduced from top to bottom; when the device works, the polluted soil is contacted with the upper surface of the T-shaped plate 4 through the feed port 2, and the soil can be accumulated on the upper surface of the T-shaped plate 4; after the motor is started, the motor drives the cam 42 to rotate, the rotation of the cam 42 drives the square plate 41 to move left and right, the T-shaped plate 4 fixedly connected with the square plate 41 can slide on the surface of the inner wall of the box body 1, when the T-shaped plate 4 moves, the polluted soil flows to the position between the pressing plate 43 and the pressing block 45 from the feeding hole 2, the left and right movement of the square plate 41 can drive the pressing plate 43 to contact with the pressing block 45, so that the polluted soil is extruded into fine particles between the pressing plate 43 and the pressing block 45, the fine particles can flow to the surface of the second filter screen 48 through the first filter screen 46, in the continuous extrusion process of the pressing plate 43 to the soil, some large particles can pass through the first filter screen 46 in the extrusion process, the second filter screen 48 arranged below the first filter screen 46 can intercept the large particles, and meanwhile, the fixing rod 47 arranged below the cam 42 can be extruded to move downwards in the rotation process of the cam 42, the moving down of dead lever 47 can drive moving down of No. two filter screens 48, through spring coupling between No. two filter screens 48 and the backup pad 49, No. two filter screens 48 can rebound under the reset action of spring after moving down one section, thereby make No. two filter screens 48 shake from top to bottom, and then make the tiny granule on No. two filter screens 48 can be quick pass through, the soil block through No. two filter screens 48 flows the next process from discharge gate 3 through No. three filter screens 66, the soil block that does not pass through No. three filter screens 66 can flow the both sides of No. three filter screens 66 along the upper surface of No. three filter screens 66, thereby made the unable next process that flows of large granule soil block, the insufficient probability of leachate and soil contact has been reduced.
As an embodiment of the invention, a connecting rod 6 is arranged below the second filter screen 48, two sides of the connecting rod 6 are hinged with second push rods 61, one end of each second push rod 61 close to the inner wall of the box body 1 is fixedly connected with a push plate 62, a limiting block 63 is arranged above each push plate 62, and the limiting block 63 is fixedly connected with the inner wall of the box body 1; a flat plate 64 is arranged at the bottom of the push plate 62, and the flat plate 64 is fixedly connected with the inner wall of the box body 1; a movable plate 65 is arranged on one side of the flat plate 64 close to the inner wall of the box body 1, the movable plate 65 is hinged with the inner wall of the box body 1, and the movable plate 65 is connected with the push plate 62 through a steel wire rope; when the second filter screen 48 moves downwards, the connecting rod 6 is driven to move downwards, the connecting rod 6 moves downwards to push the push plate 62 on the surface of the flat plate 64 through the second push rod 61, soil blocks extruded for the first time fall on the upper surface of the movable plate 65, when the push plate 62 moves, the steel wire rope is tensioned, the movable plate 65 connected with the steel wire rope is also tensioned, after the push plate 62 completes secondary extrusion on the upper surface of the movable plate 65, the push plate 62 is pulled back along with the upward movement of the second filter screen 48, the steel wire rope is loosened in the process that the push plate 62 is pulled back, the steel wire rope is loosened to enable the movable plate 65 to turn downwards, the soil blocks extruded for the second time above the movable plate 65 move downwards to flow to the next procedure through the third filter screen 66, the soil blocks are pressurized for the second time to enable soil block particles to be finer, so that the contact area between the soil blocks and the leacheate is increased, and the repairing effect is improved.
As an embodiment of the invention, a third push rod 7 is arranged on one side of the push plate 62 close to the inner wall of the box body 1, the third push rod 7 is connected with the push plate 62 through a spring, a first extrusion plate 71 and a second extrusion plate 72 are arranged on one side of the third push rod 7 close to the inner wall of the box body 1, and the first extrusion plate 71 and the second extrusion plate 72 are both hinged with the third push rod 7 through a connecting rod; a channel 73 is arranged on one side, close to the inner wall of the box body 1, of the third filter screen 66, a fourth filter screen 74 is arranged in the channel 73, an arc-shaped channel 75 is arranged below the fourth filter screen 74, and the arc-shaped channel 75 is communicated with the discharge hole 3; the bottom end of the square plate 41 is connected with a push block 411 through a connecting rod, and a cavity 412 is formed between the first filter screen 46 and the second filter screen 48; when the soil blocks subjected to secondary extrusion pass through the third filter screen 66, the soil blocks with large diameters cannot pass through the third filter screen 66, the soil blocks with large diameters can move downwards along the third filter screen 66 to the channel 73, along with continuous accumulation of the soil blocks, the soil blocks can be extruded to the upper surface of the fourth filter screen 74, meanwhile, the movement of the push plate 62 can push the movement of the third push rod 7, the movement of the third push rod 7 can enable the first extrusion plate 71 to move downwards and the second extrusion plate 72 to move upwards, the first extrusion plate 71 moves downwards so as to extrude the soil blocks on the upper surface of the fourth filter screen 74 again, the extruded soil blocks can flow out through the fourth filter screen 74, meanwhile, the large-particle soil blocks on the surface of the second filter screen 48 can be pushed by the push block 411, the moved soil blocks reach the surface of the second extrusion plate 72 through the cavity 412, the upwards movement of the second extrusion plate 72 can bring the soil blocks with large diameters to the upper surface of the briquetting 45, the soil blocks can move downwards along the upper surface of the first filter screen 46 along the upper surface of the briquetting 45 and can be extruded by the briquetting 45 again so as to obtain soil meeting the requirements And (5) blocking.
As an embodiment of the invention, a disc 8 is arranged above the second squeezing plate 72, a pressing rod 81 is fixedly connected to one side of the disc 8 close to the inner wall of the box body 1, and the pressing rod 81 is positioned above the second squeezing plate 72; a sliding block 82 is arranged on one side, away from the inner wall of the box body 1, of the disc 8, the sliding block 82 is fixedly connected with the disc 8 through a connecting rod, a square groove 83 is arranged above the sliding block 82, the square groove 83 is embedded in the box body 1, and an inclined pressing plate 84 is fixedly connected to one side, away from the inner wall of the box body 1, of the sliding block 82; when No. two stripper plates 72 rebound under the promotion of No. three push rods 7, No. two stripper plates 72 contact with depression bar 81 and promote depression bar 81 upward movement at the rebound in-process, depression bar 81 links firmly with disc 8, the removal of depression bar 81 can drive the rotation of disc 8, the rotation of disc 8 can drive the connecting rod motion that links firmly on disc 8 surface, the connecting rod of motion drives slider 82 and removes in square groove 83, slider 82's removal drives the cross arm 84 and removes, cross arm 84's removal can with swash plate 5 surface contact, the soil block on swash plate 5 surface can receive the extrusion and become loose thereby play the effect to soil block preliminary treatment, thereby improve the soil block and be extrudeed efficiency.
As an embodiment of the invention, one end of the pressing plate 43, which is far away from the box body, is provided with a first roller 431, the first roller 431 is connected with the pressing plate 43 through a rotating shaft, one side of the pressing block 45, which is close to the pressing plate 43, is provided with a second roller 451, the second roller 451 is connected with the pressing block 45 through a rotating shaft, and the first roller 431 and the second roller 451 are arranged in a staggered manner; a scraper 432 is arranged on one side of the pressure plate 43 close to the pressure plate 45; after the clod falls between clamp plate 43 and briquetting 45, clamp plate 43 extrudees the clod under the promotion of push rod 44, a gyro wheel 431 on clamp plate 43 surface meshes with No. two gyro wheels 451 on briquetting 45 surface, make the clod extruded between a gyro wheel 431 and No. two gyro wheels 451, make the clod granule become more tiny, roll extrusion simultaneously and also be difficult for remaining clod sediment, the scraper blade 432 that sets up on clamp plate 43 surface simultaneously can wash the clod sediment on briquetting 45 surface, thereby reduce the residual amount of clod sediment on briquetting 45 surface, and then make the clod can be more smooth by the extrusion into tiny granule.
As an embodiment of the invention, a group of cleaning plates 433 are hinged to the outer surfaces of the first roller 431 and the second roller 451, and the cleaning plates 433 are connected with the first roller 431 and the second roller 451 through rotating shafts; meanwhile, the other end of the cleaning plate 433 is connected with the outer walls of the first roller 431 and the second roller 451 through springs; briquetting 43 when the clod extrudees, the dislocation set of a gyro wheel 431 and No. two gyro wheels 451 makes two gyro wheels all can rotate when the clod is extruded, the clearance board 433 that sets up at a gyro wheel 431 and No. two gyro wheel 451 outer walls can be compressed when contacting with the clod, the clearance board 433 that resets is opened with the clod contact back spring clearance board 433 not as clearance board 433, the clearance board 433 that opens can clear up the soil cinder on the rotation chamber surface of a gyro wheel 431 and No. two gyro wheels 451 at the rotation in-process of a gyro wheel 431 and No. two gyro wheels 451, thereby reduce the soil cinder content of rotating the intracavity, avoid appearing the dead circumstances of card in gyro wheel 431 and No. two gyro wheels 451, thereby the extruded stability has been improved.
When the device works, the polluted soil is contacted with the upper surface of the T-shaped plate 4 through the feed port 2, and the soil can be accumulated on the upper surface of the T-shaped plate 4; after the motor is started, the motor drives the cam 42 to rotate, the rotation of the cam 42 drives the square plate 41 to move left and right, the T-shaped plate 4 fixedly connected with the square plate 41 can slide on the surface of the inner wall of the box body 1, when the T-shaped plate 4 moves, the polluted soil flows to the position between the pressing plate 43 and the pressing block 45 from the feeding hole 2, the left and right movement of the square plate 41 can drive the pressing plate 43 to contact with the pressing block 45, so that the polluted soil is extruded into fine particles between the pressing plate 43 and the pressing block 45, the fine particles can flow to the surface of the second filter screen 48 through the first filter screen 46, in the continuous extrusion process of the pressing plate 43 to the soil, some large particles can pass through the first filter screen 46 in the extrusion process, the second filter screen 48 arranged below the first filter screen 46 can intercept the large particles, and meanwhile, the fixing rod 47 arranged below the cam 42 can be extruded to move downwards in the rotation process of the cam 42, the moving down of dead lever 47 can drive moving down of No. two filter screens 48, through spring coupling between No. two filter screens 48 and the backup pad 49, No. two filter screens 48 can rebound under the reset action of spring after moving down one section, thereby make No. two filter screens 48 shake from top to bottom, and then make the tiny granule on No. two filter screens 48 can be quick pass through, the soil block through No. two filter screens 48 flows the next process from discharge gate 3 through No. three filter screens 66, the soil block that does not pass through No. three filter screens 66 can flow the both sides of No. three filter screens 66 along the upper surface of No. three filter screens 66, thereby made the unable next process that flows of large granule soil block, the insufficient probability of leachate and soil contact has been reduced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The method for restoring the heavy metal contaminated soil is characterized by comprising the following steps:
s1: excavating polluted soil, primarily screening the excavated soil, removing garbage, glass fragments and organic residues mixed in the soil, and crushing overlarge soil blocks;
s2: placing the soil primarily screened in the S1 into a soil extruder for extrusion, so that the soil is changed into fine grains from coarse grains, and mixing and stirring the fine grains after extrusion and leacheate;
s3: extracting and standing the mixture of the soil and the leacheate mixed and stirred in the S2, separating pollutants in the soil in a solid-liquid separation mode, and backfilling the treated soil or transporting the soil to other places where the soil needs to be used;
the soil extruder used in the S2 comprises a box body (1), a feeding hole (2) and a discharging hole (3); the feeding hole (2) is positioned at the top of the box body (1), the feeding hole (2) is communicated with the box body (1), a T-shaped plate (4) is arranged at the bottom of the feeding hole (2), the T-shaped plate (4) is in contact with the bottom of the feeding hole (2), a square plate (41) is arranged at the bottom of the T-shaped plate (4), and the square plate (41) is fixedly connected with the T-shaped plate (4); a cam (42) is arranged inside the square plate (41), the cam (42) is connected with a motor, and the rotation of the cam (42) can drive the square plate (41) to move left and right; pressing plates (43) are arranged on two sides of the square plate (41), the square plate (41) is connected with the pressing plates (43) through a first push rod (44), and the first push rod (44) is hinged with the square plate (41); a pressing block (45) is arranged on one side, close to the inner wall of the box body (1), of the pressing plate (43), and the pressing block (45) is fixedly connected with the box body (1); a first filter screen (46) is arranged between the pressing block (45) and the pressing plate (43), a fixing rod (47) is arranged below the cam (42), and a second filter screen (48) is fixedly connected below the fixing rod (47); supporting blocks (49) are arranged at two ends of the second filter screen (48), a sliding chute (491) is arranged in each supporting block (49), two ends of the second filter screen (48) can slide in the sliding chute (491), and two ends of the second filter screen (48) are connected with the inner wall of each supporting block (49) through springs; a third filter screen (66) is arranged at the bottom of the second filter screen (48), and the third filter screen (66) is arranged to be conical; the aperture of the first filter screen (46), the second filter screen (48) and the third filter screen (66) is gradually reduced from top to bottom;
a connecting rod (6) is arranged below the second filter screen (48), two sides of the connecting rod (6) are hinged with second push rods (61), and one ends of the second push rods (61) close to the inner wall of the box body (1) are fixedly connected with push plates (62); a flat plate (64) is arranged at the bottom of the push plate (62), and the flat plate (64) is fixedly connected with the inner wall of the box body (1); a movable plate (65) is arranged on one side, close to the inner wall of the box body (1), of the flat plate (64), the movable plate (65) is hinged with the inner wall of the box body (1), and the movable plate (65) is connected with the push plate (62) through a steel wire rope;
a third push rod (7) is arranged on one side, close to the inner wall of the box body (1), of the push plate (62), the third push rod (7) is connected with the push plate (62) through a spring, a first extrusion plate (71) and a second extrusion plate (72) are arranged on one side, close to the inner wall of the box body (1), of the third push rod (7), and the first extrusion plate (71) and the second extrusion plate (72) are hinged to the third push rod (7) through connecting rods; a channel (73) is arranged on one side, close to the inner wall of the box body (1), of the third filter screen (66), a fourth filter screen (74) is arranged in the channel (73), an arc-shaped channel (75) is arranged below the fourth filter screen (74), and the arc-shaped channel (75) is communicated with the discharge hole (3); the bottom end of the square plate (41) is connected with a push block (411) through a connecting rod, and a cavity (412) is formed between the first filter screen (46) and the second filter screen (48);
a disc (8) is arranged above the second extrusion plate (72), one side of the disc (8) close to the inner wall of the box body (1) is fixedly connected with a compression bar (81), and the compression bar (81) is positioned above the second extrusion plate (72); a sliding block (82) is arranged on one side, away from the inner wall of the box body (1), of the disc (8), the sliding block (82) is fixedly connected with the disc (8) through a connecting rod, a square groove (83) is arranged above the sliding block (82), the square groove (83) is embedded in the box body (1), and an inclined pressing plate (84) is fixedly connected to one side, away from the inner wall of the box body (1), of the sliding block (82);
the slide block (82) moves to drive the inclined pressing plate (84) to move, the inclined pressing plate (84) moves to be in contact with the surface of the inclined plate (5), and soil blocks on the surface of the inclined plate (5) are extruded to become loose, so that the soil block pretreatment effect is achieved, and the soil block extrusion efficiency is improved;
a first roller (431) is arranged at one end, away from the box body (1), of the pressing plate (43), the first roller (431) is connected with the pressing plate (43) through a rotating shaft, a second roller (451) is arranged on one side, close to the pressing plate (43), of the pressing block (45), the second roller (451) is connected with the pressing block (45) through the rotating shaft, and the first roller (431) and the second roller (451) are arranged in a staggered mode; a scraper (432) is arranged on one side, close to the pressure plate (45), of the pressure plate (43);
the outer surfaces of the first roller (431) and the second roller (451) are respectively hinged with a group of cleaning plates (433), and the cleaning plates (433) are respectively connected with the first roller (431) and the second roller (451) through rotating shafts; meanwhile, the other end of the cleaning plate (433) is connected with the outer walls of the first roller (431) and the second roller (451) through springs.
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| CN201910731939.8A CN110420988B (en) | 2019-08-09 | 2019-08-09 | Heavy metal contaminated soil remediation method |
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| US6270027B1 (en) * | 1999-09-14 | 2001-08-07 | Advance Lifts, Inc. | Pallet shredding machine |
| JP4583679B2 (en) * | 2001-09-28 | 2010-11-17 | スター精密株式会社 | Thermal printer |
| JP3698255B2 (en) * | 2001-11-30 | 2005-09-21 | 住友金属鉱山株式会社 | Soil sorting device and soil sorting method |
| CN104140822A (en) * | 2013-05-09 | 2014-11-12 | 苏州中科慧盛生物科技有限公司 | Cadmium polluted soil restoration eluant and soil eluting purifying method |
| CN104973843B (en) * | 2015-07-16 | 2016-09-21 | 成都德菲环境工程有限公司 | A kind of soil remediation medicament and restorative procedure thereof |
| CN106269027A (en) * | 2016-08-30 | 2017-01-04 | 刘运华 | A kind of medical Chinese herbal medicine breaker |
| CN106345591B (en) * | 2016-10-16 | 2018-11-13 | 杭州富阳高宏建设有限公司 | A kind of discarded stone material grinding device of curtain wall |
| CN106423369A (en) * | 2016-11-28 | 2017-02-22 | 吴保康 | Fuel coal desulfuration and breaking device for haze prevention |
| CN106623381A (en) * | 2016-12-06 | 2017-05-10 | 广东技术师范学院 | Restoration method of heavy metal contaminated soil |
| CN106622458A (en) * | 2017-01-12 | 2017-05-10 | 郭淑芳 | Stone repeated crushing device for garden |
| CN107221220A (en) * | 2017-07-08 | 2017-09-29 | 哈尔滨工程大学 | Refuse classification science popularization teaching one-piece |
| CN108079866B (en) * | 2017-12-13 | 2019-07-30 | 宁波得晴电器科技有限公司 | A kind of inorganic active heat production mixing plant |
| CN108906172B (en) * | 2018-06-27 | 2020-06-02 | 河南科技大学 | Agricultural soil crushing and sterilizing device |
| CN109012973A (en) * | 2018-08-07 | 2018-12-18 | 杨大鹏 | A kind of coating fining grinding device |
| CN109107649A (en) * | 2018-08-31 | 2019-01-01 | 侯莉芝 | A kind of factory's barren rock grinding device |
| CN109382406A (en) * | 2018-10-15 | 2019-02-26 | 霸州市辉月网络技术有限公司 | A kind of hardened soil remediation prosthetic device of farmland greening |
| CN109622580B (en) * | 2018-12-21 | 2020-10-30 | 运城地福来生物科技发展有限公司 | Injection type soil restoration handles integration equipment |
| CN109663805B (en) * | 2019-02-18 | 2021-04-23 | 河北大美环境修复科技股份有限公司 | Remediation method for heavy metal contaminated soil |
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Effective date of registration: 20210928 Address after: 231202 No. 18, Yinghua Road, Chang'an Industrial Cluster, Taohua Town, Feixi County, Hefei City, Anhui Province Applicant after: HEFEI LIQING ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. Address before: 210000 room 107, No. 82, building 1, yangguangli community, Yongle North Road, Qinhuai District, Nanjing, Jiangsu Province Applicant before: Yao Shuang |