CN112893446B - Lead-zinc mining area heavy metal polluted corn planting soil remediation device and method - Google Patents

Abstract

The invention discloses a lead-zinc mining area heavy metal polluted corn planting soil remediation device, which mainly comprises: the device comprises a grinding box, a soil inlet pipe, a crushing box, a soil storage box, a spraying box, a packing auger and a base; a soil inlet chute and a milling mechanism are arranged in the milling box; a first crushing mechanism and a second crushing mechanism which are matched with each other are arranged in the crushing box; the spraying box comprises: set up the dispersion mechanism, the setting that can scatter soil dispersion on the inside top of spray box are in spray the inside both sides of case can spray reciprocal spray from top to bottom spray mechanism, setting and be in the rabbling mechanism of the inside bottom of spray box is smashed through milling soil, disperses the soil powder again and spills, and the liquid that sprays through reciprocal spraying from top to bottom restores soil, when reducing device area, improves remediation efficiency.

Description

Lead-zinc mining area heavy metal polluted corn planting soil remediation device and method

Technical Field

The invention relates to the technical field of contaminated soil treatment, in particular to a device and a method for repairing heavy metal contaminated corn planting soil in a lead-zinc mining area.

Background

The inorganic pollutants in the soil are relatively outstanding in heavy metal, and the heavy metal is easy to accumulate because the heavy metal cannot be decomposed by soil microorganisms and is converted into methyl compounds with higher toxicity, and even some methyl compounds are accumulated in a human body at harmful concentration through a food chain, so that the human health is seriously harmed.

The heavy metal pollutants in soil mainly include mercury, cadmium, lead, copper, chromium, arsenic, nickel, iron, manganese, zinc, etc., although arsenic is not a heavy metal, it is usually discussed as being classified as a heavy metal because its behavior, source and harm are similar to those of heavy metals. As far as the needs for plants are concerned, the metallic elements can be classified into 2 types: the plant growth and development does not need elements, such as cadmium, mercury, lead and the like, which are obviously harmful to human health. Secondly, elements required by normal growth and development of plants have certain physiological functions to human bodies, such as copper, zinc and the like, but too much elements can cause pollution and hinder the growth and development of the plants.

Since the same metals have different forms in soil, and have different migration and transformation characteristics and different pollution properties, when the harm of heavy metals in soil is researched, attention is paid not only to the total content of the metals, but also to the content of various forms.

Mining, metal smelting and waste water and waste residue discharge have long been the main factors causing heavy metal pollution of soil and crops around mining areas. Heavy metal pollution has the characteristics of concealment, long-term property and irreversibility, and heavy metals entering soil exist for a long time and are accumulated continuously because of being incapable of being degraded, and finally enter a food chain through crop enrichment, so that the health of human bodies is harmed. Studies have shown that food intake is the most major route to health hazards in mine residents, with the risk of food intake being higher than the exposure route of respiratory inhalation and skin contact. Therefore, the research on the pollution risk of crops around the mining area has positive significance for guaranteeing the grain safety and the environmental protection of the mining area.

However, the existing soil treatment device generally occupies a large area due to the fact that soil is crushed and stirred in a large range, cannot be flexibly moved, is single in crushing form, cannot guarantee large-range soil crushing, cannot achieve the repair standard due to the fact that some soil is not completely crushed, cannot enable the subsequent repair effect to be obvious, cannot achieve the repair standard, cannot enable the soil to be in full contact with spray liquid due to the existing spraying mode, and accordingly is low in repair efficiency, too large in spraying amount of the repair liquid and waste in resources of the spray liquid.

Disclosure of Invention

In order to solve the technical problems, the invention provides a device and a method for restoring heavy metal polluted corn planting soil in a lead-zinc mining area.

The first technical point of the invention is as follows:

the utility model provides a lead zinc mining area heavy metal pollution's maize plants soil prosthetic devices, mainly includes: the device comprises a grinding box for grinding soil, a soil inlet pipe arranged on the grinding box and used for feeding soil, a grinding box arranged below the grinding box, a soil storage box arranged below the grinding box, a spraying box for spraying and repairing soil, a packing auger for connecting the spraying box and the soil storage box, and a base arranged below the soil storage box and the spraying box;

two mutually meshed crushing wheels are arranged in the soil inlet pipe;

an earth inlet chute and a milling mechanism are arranged in the milling box, one end of the earth inlet chute is communicated with the earth inlet pipe, and the other end of the earth inlet chute is provided with a first filter screen and communicated to the top of the crushing box;

the grinding mechanism is arranged on one side of the soil inlet chute and comprises: the first driving screw rod is vertically arranged with the soil inlet chute, the threaded sleeves are sleeved at two ends of the first driving screw rod and can enable the first driving screw rod to rotate, the driven gears are symmetrically arranged at two ends of the first driving screw rod, the first driving gear is used for driving the driven gears, sector teeth are arranged on each driven gear and meshed with the first driving screw rod, the first driving rotating shaft is arranged at one end, close to the soil inlet chute, of the first driving screw rod, and the grinding disc is arranged at one end, located in the soil inlet chute, of the first driving rotating shaft;

a first crushing mechanism and a second crushing mechanism which are matched with each other are arranged in the crushing box;

the first shredder mechanism comprises: the crushing device comprises a supporting plate arranged at the top end of the crushing box, a driving plate rotatably arranged in the supporting plate, a second driving rotating shaft arranged at the center of the driving plate, a second driving gear which is connected with the second driving rotating shaft through a first connecting arm and is meshed with the inner side of the driving plate, a second connecting arm arranged on the other side of the second driving gear, a sliding rail arranged between two vertexes of the supporting plate, an annular ring horizontally and vertically arranged with the sliding rail, a sliding block slidably arranged in the annular ring, stirring shafts arranged at two ends of the annular ring, and a plurality of crushing fan blades arranged on the stirring shafts, wherein the other end of the second connecting arm is rotatably connected with the sliding block, a sliding block fixing part used for improving the sliding stability is arranged between the annular ring and the sliding rail, and the soil inlet chute is communicated to the center of the driving plate, the driving disc can be driven by a second driving screw rod, and a second filter screen is arranged at the bottom of the driving disc;

the second shredder mechanism comprises: the crushing device comprises a third driving screw rod arranged at a position, close to the bottom, of the crushing box, a driving sleeve arranged on the third driving screw rod, crushing shafts rotatably arranged at two ends of the driving sleeve, and a plurality of crushing blades arranged on the crushing shafts, wherein the bottom of the driving sleeve is connected with the bottom of the stirring shaft through a bearing;

the spraying box comprises: the soil spraying device comprises a dispersing mechanism which is arranged at the top end inside the spraying box and can disperse and scatter soil, spraying mechanisms which are arranged on two sides inside the spraying box and can spray up and down in a reciprocating mode, and a stirring mechanism which is arranged at the bottom end inside the spraying box.

Further, the both ends of mill dish are provided with the board of digging, every the board one side of digging all is provided with the groove of digging, the mill dish with one side of the ramp contact of advancing rotates on the surface and inlays and have a plurality of milling balls, be provided with the milling groove that inside has the line on the milling ball, the board of digging can be turned up soil once more, makes soil through the milling of relapseing many times.

Further, smash the cross-section on the flabellum and be the arc, and smash one side inside that the flabellum is recessed at every and be provided with a plurality of partition blades, curved cross-section can hold more soil, and the blade is cut apart to the rethread carries out more meticulous smashing to soil.

Furthermore, the soil storage box is internally provided with a soil outlet groove, and the bottom surface of the soil outlet groove is an inclined smooth inclined surface, so that soil can be conveniently stored and fed.

Furthermore, a plurality of universal wheels are arranged below the base, so that the device is convenient to move.

Further, the dispersing mechanism includes: set up the spout on the inside top of spray box slides and sets up go out native pipe on the spout, set up go out first spring, setting between native pipe and the spout both ends and be in the cam of the pipe both sides that go out, set up and be in go out the third screen cloth on the native pipe bottom surface, slow down the dispersion speed of soil, make the slow dispersion of soil, improve the spray effect.

Further, the spraying mechanism includes: rotate the setting through the pivot and be in shower on the case medial surface sprays, with feed liquor pipe, the setting that the shower is linked together are in vertical slide, the slip setting of shower below are in slip post on the slide and the driving motor who is used for providing power, it sets up two connecting rods to rotate on the slip post, and one of them connecting rod one end is connected slip post, the other end passes through the rocker and connects driving motor, and another connecting rod one end is connected slip post, the other end is connected the shower can make shower reciprocating spray from top to bottom, and the increase sprays the area.

Further, the stirring mechanism includes: a square driving box body for providing power, driven rotating shafts arranged on four side surfaces of the driving box body, balancing weights arranged on the driven rotating shafts, a stirrer arranged on the driven rotating shafts, third driving rotating shafts vertically penetrating the upper surface and the lower surface of the driving box body and positioned on a central shaft of the driving box body, second springs arranged on the upper end and the lower end of the driving rotating shafts, a fixed column connected with the second springs and used for fixing the stirring mechanism, helical gears arranged on one end of each driven rotating shaft positioned in the driving box body, wherein each helical gear is meshed with each other, a section of the third driving rotating shaft positioned in the driving box body is provided with a bevel gear, one driven rotating shaft is also provided with a bevel gear, the two bevel gears are meshed with each other, and the stirring mechanism completes rotating stirring through the third driving rotating shaft, through balancing weight and second spring, make rabbling mechanism stir from top to bottom, increase stirring scope improves the stirring effect, makes more soil can contact and sprays liquid.

Furthermore, the balancing weight is a semicircular metal plate, the mass of the metal plate is large, and the semicircular metal plate has a better driving effect through inertia.

The second technical point of the invention is as follows:

the method for repairing soil by using the device comprises the following steps:

s1 soil grinding

The soil is primarily crushed through the soil inlet pipe and then is introduced into the grinding box, after entering the soil inlet chute, the soil is rotated through a first driving gear of the grinding mechanism, so that a driven gear rotates, and a fan-shaped tooth drives a first driving screw rod to feed in the threaded sleeve and rotate while feeding;

s2: soil disintegration

The ground soil firstly enters the driving disc, the primary crushing of the soil is completed through the second driving gear, after the second driving screw rod is opened, the driving disc starts to rotate, the second driving gear also rotates in the driving disc, the sliding block is pulled through the second connecting arm while rotating, so that the sliding block slides in the annular ring, the annular ring starts to horizontally reciprocate along the sliding rail, the stirring shaft can drive the crushing fan blades to horizontally and repeatedly crush the soil in the crushing box, the stirring shaft drives the driving sleeve to move while horizontally moving, and the crushing shaft rotates and stretches on the third driving screw rod, so that the crushing blades crush the soil at the bottom;

s3 soil transport

The crushed soil enters the soil storage box through the control of the electromagnetic valve, and is transported to the top end of the spraying box through the soil outlet groove and the auger;

s4 soil spray

Through the dispersion mechanism that sprays the incasement, make the slow drifting of soil after smashing get off, the shower through both sides is reciprocal from top to bottom sprays repair liquid, make soil and repair liquid fully contact, the rabbling mechanism of spray box bottom end, it is rotatory to make the drive box through the third drive pivot, a driven spindle in the drive box passes through the bevel gear drive, begin to rotate, and through intermeshing's helical gear, make driven spindle all begin to rotate, and rock from top to bottom through balancing weight and second spring messenger drive box, thereby accomplish wider soil stirring.

Compared with the prior art, the invention has the beneficial effects that:

firstly, the invention increases the milling range and enables the milling effect to be better by arranging the milling mechanism, continuously reversing the soil through the soil turning plate on the milling disc, continuously milling the soil through the milling balls and driving the milling disc up, down, left and right through a specific driving mode.

Secondly, the two mutually matched crushing mechanisms are arranged, and the horizontal reciprocating crushing of the second crushing mechanism is promoted through the horizontal reciprocating crushing of the first crushing mechanism, so that the soil at the middle part and the bottom part inside the crushing box can be crushed, the crushing effect is better, and the speed is higher.

Thirdly, the soil is slowly dispersed and spilled by arranging the dispersing mechanism in the spraying box, the spraying liquid is sprayed up and down by the spraying pipes on the two sides in a reciprocating mode, the soil is contacted with the spraying liquid in a larger area, and the soil is stirred up and down by the stirring mechanism at the bottom, so that the soil is contacted with the spraying liquid and the repairing liquid to a greater extent, and the repairing efficiency is improved.

Drawings

FIG. 1 is a front view of the internal structural schematic of the present invention;

FIG. 2 is a top plan view of a schematic of a first shredder mechanism according to the present invention;

FIG. 3 is a top view of a schematic of the structure of the grinding pan of the present invention;

FIG. 4 is an enlarged view of the schematic structure of the area A in FIG. 1;

FIG. 5 is an enlarged view of the schematic view of the area B in FIG. 3;

FIG. 6 is a front view showing a schematic configuration of a stirring shaft and crushing blades in example 2;

FIG. 7 is a right side view of the fan blade crushing structure in example 2;

fig. 8 is a plan view showing an internal structure of the driving case of the present invention.

Wherein, 1, soil feeding pipe, 11, crushing wheel, 2, grinding box, 21, grinding mechanism, 211, first driving screw rod, 212, threaded sleeve, 213, first driving gear, 214, driven gear, 215, sector gear, 216, first driving rotating shaft, 217, grinding disc, 2171, soil turning plate, 21711, soil turning groove, 2172, grinding ball, 21721, grinding chute, 22, soil feeding, 23, first filter screen, 3, crushing box, 31, first crushing mechanism, 311, supporting plate, 312, driving disc, 313, second driving screw rod, 314, second driving rotating shaft, 315, second driving gear, 316, first connecting arm, 317, annular ring, 3171, slider, 3172, slider fixing part, 3173, stirring shaft, 31731, crushing fan blade, 317311, separating knife plate, 318, sliding rail, 319, second connecting arm, 32, second crushing mechanism, 321, driving sleeve, 322, crushing shaft, 324, The crushing blade, 323, a third driving screw rod, 4, a second filter screen, 5, a soil storage box, 51, a soil discharging groove, 6, a base, 61, a universal wheel, 7, a packing auger, 8, a spraying box, 81, a dispersing mechanism, 811, a sliding chute, 812, a first spring, 813, a cam, 814, a soil discharging pipe, 815, a third screen, 82, a spraying mechanism, 821, a spraying pipe, 822, a liquid inlet pipe, 823, a rotating shaft, 824, a sliding way, 825, a sliding column, 826, a driving motor, 827, a connecting rod, 83, a stirring mechanism, 831, a fixing column, 832, a second spring, 833, a driving box body, 834, a driven rotating shaft, 835, a balancing weight, 836, a stirrer, 837, a third driving rotating shaft, a bevel gear, 839 and a bevel gear.

Detailed Description

Example 1:

as shown in fig. 1, a lead-zinc mining area heavy metal contaminated corn planting soil prosthetic devices mainly includes: the device comprises a grinding box 2 for grinding soil, a soil inlet pipe 1 arranged on the grinding box 2 and used for feeding soil, a grinding box 3 arranged below the grinding box 2, a soil storage box 5 arranged below the grinding box 3, a spraying box 8 used for spraying and repairing soil, a packing auger 7 used for connecting the spraying box 8 with the soil storage box 5, and a base 6 arranged below the soil storage box 5 and the spraying box 8;

as shown in fig. 1, two mutually meshed crushing wheels 11 are arranged in the soil inlet pipe 1;

as shown in fig. 1, an earth inlet chute 22 and a grinding mechanism 21 are arranged in the grinding box 2, one end of the earth inlet chute 22 is communicated with the earth inlet pipe 1, and the other end is provided with a first filter screen 23 and communicated to the top of the crushing box 3;

as shown in fig. 1, the grinding mechanism 21 is disposed on one side of the soil intake chute 22, and the grinding mechanism 21 includes: a first driving screw 211 arranged perpendicular to the soil inlet chute 22, a threaded sleeve 212 sleeved on both ends of the first driving screw 211 and capable of rotating the first driving screw 211, driven gears 214 symmetrically arranged on both ends of the first driving screw 211, a first driving gear 213 for driving the driven gears 214, a sector gear 215 arranged on each driven gear 214 and meshed with the first driving screw 211, a first driving rotating shaft 216 arranged on one end of the first driving screw 211 close to the soil inlet chute 22, and a grinding disc 217 arranged on one end of the first driving rotating shaft 216 located in the soil inlet chute 22;

as shown in fig. 1, a first crushing mechanism 31 and a second crushing mechanism 32 which are matched with each other are arranged in the crushing box 3;

as shown in fig. 1, 2, and 4, the first crushing mechanism 31 includes: a supporting plate 311 disposed at the top end of the crushing box 3, a driving plate 312 rotatably disposed in the supporting plate 311, a second driving rotating shaft 314 disposed at the center of the driving plate 312, a second driving gear 315 connected to the second driving rotating shaft 314 through a first connecting arm 316 and engaged with the inner side of the driving plate 312, a second connecting arm 319 disposed on the other surface of the second driving gear 315, a sliding rail 318 disposed between two vertexes of the supporting plate 311, an annular ring 317 horizontally and vertically slidably disposed with the sliding rail 318, a slider 3171 slidably disposed in the annular ring 317, stirring shafts 3173 disposed at two ends of the annular ring 317, a plurality of crushing blades 31731 disposed on the stirring shafts 3173, the other end of the second connecting arm 319 rotatably connected with the slider 3171, a slider 3172 for improving sliding stability disposed between the annular ring 317 and the sliding rail 318, the soil inlet chute 22 is communicated to the center of the driving disc 312, the driving disc 312 can be driven by a second driving screw rod 313, and the bottom of the driving disc 312 is provided with a second filter screen 4;

as shown in fig. 1, the second crushing mechanism 32 includes: a third driving screw 323 arranged at a position of the crushing box 3 close to the bottom, a driving sleeve 321 arranged on the third driving screw 323, a crushing shaft 322 rotatably arranged at two ends of the driving sleeve 321, and a plurality of crushing blades 324 arranged on the crushing shaft 322, wherein the bottom of the driving sleeve 321 is connected with the bottom of the stirring shaft 3173 through a bearing;

as shown in fig. 1, the shower box 8 includes: a dispersing mechanism 81 which is arranged at the top end in the spraying box 8 and can disperse and scatter soil, spraying mechanisms 82 which are arranged at two sides in the spraying box 8 and can spray up and down in a reciprocating manner, and a stirring mechanism 83 which is arranged at the bottom end in the spraying box 8.

As shown in fig. 1, 3 and 5, the two ends of the grinding disc 217 are provided with soil-turning plates 2171, one side of each soil-turning plate 2171 is provided with a soil-turning groove 21711, the surface of one side of the grinding disc 217 contacting the soil-feeding chute 22 is embedded with a plurality of grinding balls 2172 in a rotating way, and the grinding balls 2172 are provided with grinding grooves 21721 with grooves inside.

As shown in fig. 1, a soil discharging groove 51 is provided in the soil storage box 5, and the bottom surface of the soil discharging groove 51 is an inclined smooth slope.

As shown in fig. 1, a plurality of universal wheels 61 are provided under the base 6.

As shown in fig. 1, the dispersing mechanism 81 includes: a chute 811 arranged at the top end inside the spray box 8, an earth outlet pipe 814 arranged on the chute 811 in a sliding manner, a first spring 812 arranged between the earth outlet pipe 814 and the two ends of the chute 811, cams 813 arranged at two sides of the earth outlet pipe 814, and a third screen 815 arranged on the bottom surface of the earth outlet pipe 814.

As shown in fig. 1, the spraying mechanism 82 includes: the spraying device comprises a spraying pipe 821 arranged on the inner side surface of the spraying box 8 in a rotating mode through a rotating shaft 823, a liquid inlet pipe 822 communicated with the spraying pipe 821, a vertical slide 824 arranged below the spraying pipe 821, a sliding column 825 arranged on the slide 824 in a sliding mode and a driving motor 826 used for providing power, wherein two connecting rods 827 are arranged on the sliding column 825 in a rotating mode, one end of one connecting rod 827 is connected with the sliding column 825, the other end of the connecting rod 827 is connected with the driving motor 826 through a rocker, one end of the other connecting rod 827 is connected with the sliding column 825, and the other end of the other connecting rod 827 is connected with the spraying pipe 821.

As shown in fig. 1 and 8, the stirring mechanism 83 includes: a square driving box 833 used for providing power, driven shafts 834 arranged on four sides of the driving box 833, clump weights 835 arranged on the driven shafts 834, stirrers 836 arranged on the driven shafts 834, third driving shafts 837 vertically penetrating the upper and lower surfaces of the driving box 833 and positioned on the central shaft of the driving box 833, second springs 832 arranged on the upper and lower ends of the driving shafts 837, fixing columns 831 connected with the second springs 832 and used for fixing the stirring mechanisms 83, helical gears 839 arranged at one end of each driven shaft 834 positioned in the driving box 833, wherein each helical gear 839 is engaged with each other, a section of the third driving rotating shaft 837 located inside the driving box 833 is provided with a bevel gear 838, and one of the driven rotating shafts 834 is also provided with bevel gears 838, and the two bevel gears 838 are meshed with each other.

As shown in fig. 1, the weight 835 is a semicircular metal plate.

The method for soil remediation by the device comprises the following steps:

s1 soil grinding

The soil is primarily crushed through the soil inlet pipe 1 and then is introduced into the grinding box 2, after entering the soil inlet chute 22, the soil is rotated through the first driving gear 213 of the grinding mechanism 21, so that the driven gear 214 rotates, the fan-shaped teeth 215 drive the first driving screw rod 211 to feed in the threaded sleeve 212, the soil is rotated while feeding, the grinding range of the grinding disc 217 is enlarged because the first driving rotating shaft 216 is arranged at the position of the grinding disc 217 deviating from the center of a circle, when the grinding disc 217 is ground up, down, left and right, the soil is continuously turned up through the soil turning groove 21711 by the soil turning plate 2171, and the ground soil enters the grinding box 3 after being screened by the first filter screen 23;

s2: soil disintegration

The ground soil firstly enters the driving disc 312, the primary crushing of the soil is completed through the second driving gear 315, after the second driving screw 313 is opened, the driving disc 312 starts to rotate, the second driving gear 315 also rotates in the driving disc 312, the sliding block 3171 is pulled through the second connecting arm 319 while rotating, the sliding block 3171 slides in the annular ring 317, the annular ring 317 starts to horizontally reciprocate along the sliding rail 318, so that the stirring shaft 3173 can drive the crushing fan blades 31731 to horizontally and repeatedly crush the soil in the crushing box 3, the stirring shaft 3173 horizontally moves and simultaneously drives the driving sleeve 321 to move, the crushing shaft 322 rotates on the third driving screw 323 to stretch, and the crushing blades 324 crush the soil at the bottom;

s3 soil transport

The crushed soil enters the soil storage box 5 through the control of the electromagnetic valve, and is transported to the top end of the spraying box 8 through the soil outlet groove 51 and the auger 7;

s4 soil spray

Through dispersion mechanism 81 in the spray box 8, make the slow drift of soil after smashing get off, spray the repairing liquid through spray pipe 821 reciprocating from top to bottom of both sides, make soil and repairing liquid fully contact, the rabbling mechanism 83 of 8 bottoms in the spray box, it is rotatory to make drive box 833 through third drive pivot 837, a driven rotation shaft 834 in the drive box 833 passes through bevel gear 838 drive, begin to rotate, and through intermeshing's helical gear 839, make driven rotation shaft 834 all begin to rotate, and make drive box 833 rock from top to bottom through balancing weight 835 and second spring 832, thereby accomplish more extensive soil stirring.

Example 2:

example 2 differs from example 1 in that:

as shown in fig. 6 and 7, the crushing blades 31731 have an arc-shaped cross section, and a plurality of dividing blades 317311 are provided inside the recessed side of each crushing blade 31731.

By improving the structure of the crushing fan blades 31731, the crushing efficiency is improved by 32.5%, and the repairing efficiency is improved by 22.3%.

The soil spray solutions used in the two examples were purchased from Kangyuan oasis biology, Inc.

Claims (10)

1. The utility model provides a lead zinc mining area heavy metal pollution's maize plants soil prosthetic devices which characterized in that mainly includes: the soil treatment device comprises a grinding box (2) for grinding soil, a soil inlet pipe (1) arranged on the grinding box (2) and used for feeding soil, a grinding box (3) arranged below the grinding box (2), a soil storage box (5) arranged below the grinding box (3), a spraying box (8) for spraying and repairing soil, a packing auger (7) for connecting the spraying box (8) with the soil storage box (5), and a base (6) arranged below the soil storage box (5) and the spraying box (8);

two mutually meshed crushing wheels (11) are arranged in the soil inlet pipe (1);

an earth inlet chute (22) and a milling mechanism (21) are arranged in the milling box (2), one end of the earth inlet chute (22) is communicated with the earth inlet pipe (1), and the other end of the earth inlet chute is provided with a first filter screen (23) and communicated to the top of the milling box (3);

the grinding mechanism (21) is arranged on one side of the soil intake chute (22), and the grinding mechanism (21) comprises: the device comprises a first driving screw rod (211) which is perpendicular to the soil inlet chute (22), threaded sleeves (212) which are sleeved at two ends of the first driving screw rod (211) and can enable the first driving screw rod (211) to rotate, driven gears (214) which are symmetrically arranged at two ends of the first driving screw rod (211), a first driving gear (213) which is used for driving the driven gears (214), sector teeth (215) which are arranged on each driven gear (214) and are mutually meshed with the first driving screw rod (211), a first driving rotating shaft (216) which is arranged at one end, close to the soil inlet chute (22), of the first driving screw rod (211), and a grinding disc (217) which is arranged at one end, located in the soil inlet chute (22), of the first driving rotating shaft (216);

a first crushing mechanism (31) and a second crushing mechanism (32) which are matched with each other are arranged in the crushing box (3);

the first crushing mechanism (31) includes: a supporting plate (311) arranged at the top end of the crushing box (3), a driving plate (312) rotatably arranged in the supporting plate (311), a second driving rotating shaft (314) arranged at the center of the driving plate (312), a second driving gear (315) which is connected with the second driving rotating shaft (314) through a first connecting arm (316) and is meshed with the inner side of the driving plate (312), a second connecting arm (319) arranged on the other surface of the second driving gear (315), a sliding rail (318) arranged between two vertexes of the supporting plate (311), an annular ring (317) horizontally and vertically arranged with the sliding rail (318), a slide block (3171) arranged in the annular ring (317) in a sliding manner, stirring shafts (3173) arranged at two ends of the annular ring (317), and a plurality of crushing fan blades (31731) arranged on the stirring shaft (3173), the other end of the second connecting arm (319) is rotatably connected with the sliding block (3171), a sliding block fixing piece (3172) used for improving the sliding stability is arranged between the annular ring (317) and the sliding rail (318), the soil inlet chute (22) is communicated to the center of the driving disc (312), the driving disc (312) can be driven by a second driving screw rod (313), and a second filter screen (4) is arranged at the bottom of the driving disc (312);

the second crushing mechanism (32) includes: the crushing device comprises a third driving screw rod (323) arranged at a position, close to the bottom, of the crushing box (3), a driving sleeve (321) arranged on the third driving screw rod (323), crushing shafts (322) rotatably arranged at two ends of the driving sleeve (321), and a plurality of crushing blades (324) arranged on the crushing shafts (322), wherein the bottom of the driving sleeve (321) is connected with the bottom of the stirring shaft (3173) through a bearing;

the spray box (8) comprises: the device comprises a dispersing mechanism (81) which is arranged at the top end inside the spraying box (8) and can disperse and scatter soil, spraying mechanisms (82) which are arranged at two sides inside the spraying box (8) and can spray up and down in a reciprocating mode, and a stirring mechanism (83) which is arranged at the bottom end inside the spraying box (8).

2. The lead-zinc mining area heavy metal polluted corn planting soil remediation device as claimed in claim 1, wherein soil turning plates (2171) are arranged at two ends of the grinding disc (217), a soil turning groove (21711) is formed in one side of each soil turning plate (2171), a plurality of grinding balls (2172) are rotatably embedded in the surface of one side, in contact with the soil inlet chute (22), of the grinding disc (217), and grinding grooves (21721) with grooves inside are formed in the grinding balls (2172).

3. The device for restoring the soil for planting corns contaminated by heavy metals in a lead-zinc mining area as claimed in claim 1, wherein the cross section of the crushing fan blades (31731) is arc-shaped, and a plurality of separating knife boards (317311) are arranged inside the recessed side of each crushing fan blade (31731).

4. The lead-zinc mining area heavy metal polluted corn planting soil remediation device as claimed in claim 1, wherein the soil storage box (5) is internally provided with a soil outlet groove (51), and the bottom surface of the soil outlet groove (51) is an inclined smooth slope.

5. The lead-zinc mining area heavy metal polluted corn planting soil remediation device as claimed in claim 1, wherein a plurality of universal wheels (61) are arranged below the base (6).

6. The lead-zinc mining area heavy metal contaminated corn planting soil remediation device of claim 1, wherein the dispersion mechanism (81) comprises: the soil spraying device comprises a sliding groove (811) arranged at the top end inside the spraying box (8), a soil discharging pipe (814) arranged on the sliding groove (811) in a sliding mode, a first spring (812) arranged between the soil discharging pipe (814) and the two ends of the sliding groove (811), cams (813) arranged on two sides of the soil discharging pipe (814), and a third screen (815) arranged on the bottom surface of the soil discharging pipe (814).

7. The lead-zinc mining area heavy metal contaminated corn planting soil remediation device of claim 1, wherein the spraying mechanism (82) comprises: rotate through pivot (823) and set up shower (821) on spraying case (8) medial surface, with feed liquor pipe (822) that shower (821) are linked together, set up in vertical slide (824) of shower (821) below, slip setting are in slip post (825) on slide (824) and be used for providing power driving motor (826), it sets up two connecting rods (827) to rotate on slip post (825), and one of them connecting rod (827) one end is connected slip post (825), and the other end passes through rocker connection driving motor (826), and another connecting rod (827) one end is connected slip post (825), and the other end is connected shower (821).

8. The lead-zinc mining area heavy metal contaminated corn planting soil remediation device of claim 1, wherein the stirring mechanism (83) comprises: the stirring device comprises a square driving box body (833) used for providing power, driven rotating shafts (834) arranged on four sides of the driving box body (833), balancing weights (835) arranged on the driven rotating shafts (834), a stirrer (836) arranged on the driven rotating shafts (834), a third driving rotating shaft (837) vertically penetrating through the upper surface and the lower surface of the driving box body (833) and positioned on a central shaft of the driving box body (833), second springs (832) arranged on the upper end and the lower end of the third driving rotating shaft (837), fixing columns (831) connected with the second springs (832) and used for fixing stirring mechanisms (83), helical gears (839) arranged at one end of each driven rotating shaft (834) positioned inside the driving box body (833), wherein the helical gears (839) are mutually meshed, and a section of the third driving rotating shaft (837) positioned inside the driving box body (833) is provided with a bevel gear (838), and one driven rotating shaft (834) is also provided with a bevel gear (838), and the two bevel gears (838) are meshed with each other.

9. The lead-zinc mining area heavy metal contaminated corn planting soil remediation device of claim 8, wherein the counterweight (835) is a semicircular metal plate.

10. A method of soil remediation using the apparatus of any one of claims 1 to 9 including the steps of:

s1 soil grinding

The soil is primarily crushed through the soil inlet pipe (1) and then is introduced into the grinding box (2), after entering the soil inlet chute (22), the soil is rotated through a first driving gear (213) of the grinding mechanism (21), so that a driven gear (214) is rotated, and a fan-shaped tooth (215) drives a first driving screw rod (211) to feed in a threaded sleeve (212), and the first driving screw rod rotates while feeding, because a first driving rotating shaft (216) is arranged at the position of the grinding disc (217) deviating from the center of a circle, the grinding range of the grinding disc (217) is enlarged, when the grinding disc (217) is ground up, down, left and right, the soil is continuously turned up through a soil turning groove (21711) by a soil turning plate (2171), and the ground soil enters the grinding box (3) after being screened by a first filter screen (23);

s2: soil disintegration

The ground soil firstly enters a driving disc (312), the primary crushing of the soil is completed through a second driving gear (315), after a second driving screw rod (313) is opened, the driving disc (312) starts to rotate, the second driving gear (315) also rotates in the driving disc (312), the sliding block (3171) is pulled through the second connecting arm (319) while rotating, the sliding block (3171) slides in the annular ring (317), the annular ring (317) starts to horizontally reciprocate along the sliding rail (318), so that the stirring shaft (3173) can drive the crushing fan blades (31731) to horizontally and repeatedly crush the soil in the crushing box (3), the stirring shaft (3173) horizontally moves and drives the driving sleeve (321) to move, the crushing shaft (322) is rotated and stretched on the third driving screw rod (323), and the crushing blade (324) is used for crushing the soil at the bottom;

s3 soil transport

The crushed soil enters the soil storage box (5) through the control of the electromagnetic valve, and is transported to the top end of the spraying box (8) through the soil outlet groove (51) and the auger (7);

s4 soil spray

Through dispersion mechanism (81) in spray box (8), make the soil after smashing slowly drift down, spray shower (821) through both sides and reciprocate from top to bottom and spray repair liquid, make soil and repair liquid fully contact, stirring mechanism (83) of spray box (8) bottom, it is rotatory to make drive box (833) through third drive pivot (837), a driven rotating shaft (834) in drive box (833) passes through bevel gear (838) drive, begin to rotate, and through helical gear (839) of intermeshing, make driven rotating shaft (834) all begin to rotate, and make drive box (833) rock from top to bottom through balancing weight (835) and second spring (832), thereby accomplish soil stirring on a wider range.

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