CN213103760U - Heavy metal contaminated soil ectopic leaching repair system - Google Patents
Heavy metal contaminated soil ectopic leaching repair system Download PDFInfo
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- CN213103760U CN213103760U CN202021453658.5U CN202021453658U CN213103760U CN 213103760 U CN213103760 U CN 213103760U CN 202021453658 U CN202021453658 U CN 202021453658U CN 213103760 U CN213103760 U CN 213103760U
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Abstract
The utility model discloses an ectopic drip washing repair system of heavy metal contaminated soil belongs to soil repair equipment technical field. The wet vibrating screen comprises a wet vibrating screen, a grading stirring device and a centrifugal dehydration device, wherein the discharge end of the wet vibrating screen is connected into the grading stirring device, the discharge end of the grading stirring device is connected into the centrifugal dehydration device through a sludge pump, and the grading stirring device is composed of a spiral grading mechanism and a stirring mechanism. Larger gravel particles are continuously pushed by the spiral blade and enter the conical gravel washing barrel, the gravel particles continuously climb and drain in the gravel washing barrel, when the gravel particles reach the discharge end of the gravel washing barrel, the upper high-pressure spray head washes the gravel particles through clear water, the gravel particles obtained from the gravel particle discharge port are cleaned, and the gravel particles can be directly backfilled; the sand and soil grading, spraying, gravel washing, stirring and other functions are integrated into one device, so that the occupied area can be greatly reduced.
Description
Technical Field
The utility model relates to an ectopic drip washing repair system of heavy metal contaminated soil belongs to soil repair equipment technical field.
Background
Soil is a loose surface layer having fertility on the surface of the land and capable of growing plants. The soil not only provides mechanical support capability for plant growth, but also provides fertility factors such as water, fertilizer, gas, heat and the like required for plant growth and development. With the continuous development of industrialization, the problem of soil pollution is more and more serious. Soil pollutants can be broadly classified into two broad categories, inorganic pollutants and organic pollutants. The inorganic pollutants mainly comprise acid, alkali, heavy metal, salts, compounds of radioactive elements cesium and strontium, compounds containing arsenic, selenium and fluorine, and the like. The organic pollutants mainly comprise organic pesticides, phenols, cyanides, petroleum, synthetic detergents, 3, 4-benzopyrene, harmful microorganisms brought by municipal sewage, sludge and animal manure, and the like. Wherein, after soil is polluted by heavy metal, heavy metal gets into the human body through the plant, because heavy metal is difficult for decomposing, can constantly accumulate in the human body, when reaching certain concentration, can cause human disease.
Therefore, soil remediation of soil contaminated with heavy metals is required. At present, the soil remediation is carried out by ectopic leaching remediation, namely, the polluted soil is dug out, and backfilled to the original place after the ectopic leaching is carried out. The ectopic leaching mainly comprises the following steps: (1) feeding the screened material of the wet vibrating screen and washing water into a spiral classifier together for classification screening; (2) discharging larger-grained gravel from a sand return port of the spiral classifier through spiral lifting, and overflowing finer soil grain slurry from the overflow weir to the leaching agitator tank; (3) after the leaching agitation tank is fully stirred and reacts, the mixed slurry sludge is pumped into a centrifugal dehydration device, and liquid-phase pollutants are separated from solid soil along with water; and (4) backfilling solid soil, and further treating the leaching water containing the pollutants in modes of electric flocculation purification and the like to remove heavy metals.
At present, heavy metal contaminated soil ex-situ leaching repair systems contain more devices and are low in functional synthesis degree, so that the occupied area is large. Therefore, design an ectopic drip washing repair system of heavy metal contaminated soil, it has contained a multi-functional hierarchical agitated vessel, and this hierarchical agitated vessel can realize that sandy soil is hierarchical, sprays, gravel washes, a plurality of functions such as stirring, can replace current a plurality of single function's equipment.
Disclosure of Invention
The utility model discloses the technical problem that will solve lies in: the system for the ectopic leaching remediation of the heavy metal contaminated soil solves the problems that the existing system for the ectopic leaching remediation of the heavy metal contaminated soil is large in occupied area due to the fact that more devices are included and the function synthesis degree is low.
The utility model discloses the technical problem that will solve takes following technical scheme to realize:
an ectopic leaching remediation system for heavy metal contaminated soil comprises a wet type vibrating screen, a grading stirring device and a centrifugal dehydration device, wherein the discharge end of the wet type vibrating screen is connected into the grading stirring device, the discharge end of the grading stirring device is connected into the centrifugal dehydration device through a sludge pump, and the grading stirring device consists of a spiral grading mechanism and a stirring mechanism;
the spiral grading mechanism comprises a spiral shell, a spiral motor, a spiral shaft, a spiral blade, a spray header and a high-pressure spray head;
the spiral shell is formed by sequentially and hermetically connecting a feeding conveying cylinder, a spraying grading cylinder, a gravel washing cylinder and a discharging conveying cylinder, wherein the feeding conveying cylinder and the discharging conveying cylinder have the same diameter, the spraying grading cylinder has the diameter larger than that of the feeding conveying cylinder, and the spraying grading cylinder is connected with the discharging conveying cylinder through a conical gravel washing cylinder;
the spiral motor is fixed at the end part of the spiral shell, the spiral shaft is movably arranged between the two ends of the spiral shell, the spiral motor drives the spiral shaft to rotate, the surface of the spiral shaft is provided with spiral blades, and the diameters of the spiral blades are matched with the diameters of all sections of the spiral shell;
the upper part of the feeding conveying cylinder is provided with a feeding hole, the feeding hole is connected with a material sieved by a wet vibrating screen, a spray head is arranged above the spray grading cylinder, the lower half part of the spray grading cylinder is provided with an overflow nozzle, a high-pressure spray nozzle is arranged above the discharge end of the gravel washing cylinder, and a gravel discharge port is arranged below the discharge conveying cylinder;
the stirring mechanism comprises a stirring shell, a stirring motor, a stirring shaft and stirring blades;
the stirring shell is fixed at the lower part of the spiral shell, the overflow nozzle is connected into the stirring shell, the bottom of the stirring shell is provided with a slurry outlet, and the slurry outlet is connected into centrifugal dehydration equipment through a sludge pump;
the stirring motor is fixed at the end part of the stirring shell, the stirring shaft is movably arranged between the two ends of the stirring shell, the stirring motor drives the stirring shaft to rotate, and stirring blades are arranged on the stirring shaft.
As a preferred example, the overflow nozzle is positioned on the circular ring-shaped end surface of the spray grading cylinder, which is hermetically connected with the feeding conveying cylinder.
As a preferred example, the overflow lip is located above one end of the agitator housing and the slurry outlet is located below the other end of the agitator housing.
As a preferable example, a plurality of spray headers are uniformly arranged above the spray grading cylinder from the feeding end to the discharging end, and the spray headers are connected with a spray washing water tank through a water pump.
As a preferred example, the high-pressure spray head is connected with the clean water tank through a high-pressure pump.
The utility model has the advantages that:
(1) the method comprises the following steps of (1) feeding screened materials of a wet vibrating screen and washing water into a feed inlet of a spiral grading mechanism, and conveying the materials and the washing water to a spray grading cylinder through a spiral blade in a feed conveying cylinder, wherein the spray grading cylinder has a large diameter and can contain more spray liquid, and soil can be fully cleaned in the spray grading cylinder, so that mixed slurry containing fine particles and solid gravel containing larger particles are formed;
(2) the mixed slurry enters the stirring shell through the overflow nozzle, is fully stirred and reacted through the stirring blade, and is finally pumped into a centrifugal dehydration device from the slurry discharge port;
(3) the large-particle gravel is continuously pushed by the helical blade and enters the conical gravel washing barrel, the gravel continuously climbs and drains in the gravel washing barrel, when the gravel reaches the discharge end of the gravel washing barrel, the upper high-pressure spray head washes the gravel through clear water, the gravel obtained from the gravel discharge port is cleaned, the gravel can be directly backfilled, and the high-pressure washing water converges into the spray grading barrel to form slurry;
(4) the sand and soil grading, spraying, gravel washing, stirring and other functions are integrated into one device, so that the occupied area can be greatly reduced.
Drawings
FIG. 1 is a schematic structural view of a middle-stage stirring apparatus of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
In the figure: the device comprises a grading stirring device 1, a spiral shell 101, a spiral motor 102, a spiral shaft 103, a spiral blade 104, a spray header 105, a high-pressure spray head 106, a feeding conveying cylinder 107, a spray grading cylinder 108, a grit flushing cylinder 109, a discharging conveying cylinder 110, a feeding hole 111, an overflow nozzle 112, a grit discharging hole 113, a stirring shell 114, a stirring motor 115, a stirring shaft 116, a stirring blade 117, a mud discharging hole 118, a bracket 119, a centrifugal dehydration device 2 and a wet type vibrating screen 3.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.
As shown in fig. 1 and 2, the system for washing and repairing heavy metal contaminated soil in an ectopic manner comprises a wet vibrating screen 3, a grading stirring device 1 and a centrifugal dehydration device 2, wherein the discharge end of the wet vibrating screen 3 is connected to the grading stirring device 1, the discharge end of the grading stirring device 1 is connected to the centrifugal dehydration device 2 through a sludge pump, and the grading stirring device 1 consists of a spiral grading mechanism and a stirring mechanism;
the spiral grading mechanism comprises a spiral shell 101, a spiral motor 102, a spiral shaft 103, a spiral blade 104, a spray header 105 and a high-pressure spray head 106;
the spiral shell 101 is formed by sequentially and hermetically connecting a feeding conveying cylinder 107, a spraying grading cylinder 108, a gravel washing cylinder 109 and a discharging conveying cylinder 110, wherein the feeding conveying cylinder 107 and the discharging conveying cylinder 110 have the same diameter, the spraying grading cylinder 108 has a diameter larger than that of the feeding conveying cylinder 107, and the spraying grading cylinder 108 is connected with the discharging conveying cylinder 110 through the conical gravel washing cylinder 109;
the screw motor 102 is fixed at the end part of the screw shell 101, the screw shaft 103 is movably arranged between the two ends of the screw shell 101, the screw motor 102 drives the screw shaft 103 to rotate, the surface of the screw shaft 103 is provided with screw blades 104, and the diameters of the screw blades 104 are matched with the diameters of the sections of the screw shell 101;
a feeding hole 111 is formed in the upper portion of the feeding conveying cylinder 107, the feeding hole 111 is connected with materials screened by the wet type vibrating screen 3, a spray head 105 is arranged above the spray grading cylinder 108, an overflow nozzle 112 is arranged on the lower half portion of the spray grading cylinder 108, a high-pressure spray head 106 is arranged above the discharging end of the gravel washing cylinder 109, and a gravel discharging port 113 is formed below the discharging conveying cylinder 110; the screw housing 101 is supported by a bracket 119;
the stirring mechanism comprises a stirring shell 114, a stirring motor 115, a stirring shaft 116 and stirring blades 117;
the stirring shell 114 is fixed at the lower part of the spiral shell 101, the overflow nozzle 112 is connected into the stirring shell 114, the bottom of the stirring shell 114 is provided with a slurry outlet 118, and the slurry outlet 118 is connected into the centrifugal dehydration equipment 2 through a sludge pump;
the stirring motor 115 is fixed at the end of the stirring shell 114, the stirring shaft 116 is movably arranged between the two ends of the stirring shell 114, the stirring motor 115 drives the stirring shaft 116 to rotate, and the stirring shaft 116 is provided with stirring blades 117.
The overflow nozzle 112 is positioned on the circular ring-shaped end surface of the spray grading cylinder 108 which is hermetically connected with the feeding conveying cylinder 107.
The overflow lip 112 is located above one end of the agitator housing 114 and the mud discharge outlet 118 is located below the other end of the agitator housing 114. So that the slurry can be discharged from the other end after being sufficiently stirred.
A plurality of spray heads 105 are uniformly arranged above the spray grading cylinder 108 from the feeding end to the discharging end, and the spray heads 105 are connected with a spray washing water tank through a water pump. Different eluents are selected according to different soil pollution components.
The high pressure nozzle 106 is connected to the clean water tank by a high pressure pump.
The screw motor 102 and the stirring motor 115 are speed reduction motors. Preferably, the liquid level within agitator housing 114 is below agitator shaft 116.
The working principle is as follows:
the material sieved by the wet vibrating screen 3 and washing water are sent into a feed inlet of a spiral grading mechanism together, and are conveyed to a spray grading cylinder 108 through a spiral blade 104 in a feed conveying cylinder 107, because the spray grading cylinder 108 has a larger diameter and can contain more spray liquid, soil can be fully cleaned in the spray grading cylinder 108, so that mixed slurry containing fine particles and solid gravel containing larger particles are formed, the mixed slurry cannot ascend from a conical gravel washing cylinder 109 through the spiral blade 104, and the solid gravel can be pushed to ascend by the spiral blade 104;
the mixed mud enters the stirring shell 114 from the overflow nozzle 112, is fully stirred and reacted by the stirring blade 117, and is finally pumped into the centrifugal dehydration device 2 from the mud discharge port 118;
the gravel of bigger granule is constantly impeld by helical blade 104, gets into conical gravel washing section of thick bamboo 109, and the gravel constantly climbs in gravel washing section of thick bamboo 109 inside and drips, and when the gravel reached gravel washing section of thick bamboo 109 discharge end, the high pressure nozzle 106 of top washed the gravel through the clear water, and the gravel that obtains from gravel discharge port 113 is by the sanitization, can directly backfill, and high pressure cleaning water converges into and sprays hierarchical section of thick bamboo 108, forms mud.
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 above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An ectopic leaching remediation system for heavy metal contaminated soil comprises a wet type vibrating screen, a grading stirring device and a centrifugal dehydration device, wherein the discharge end of the wet type vibrating screen is connected into the grading stirring device, and the discharge end of the grading stirring device is connected into the centrifugal dehydration device through a sludge pump;
the spiral grading mechanism comprises a spiral shell, a spiral motor, a spiral shaft, a spiral blade, a spray header and a high-pressure spray head;
the spiral shell is formed by sequentially and hermetically connecting a feeding conveying cylinder, a spraying grading cylinder, a gravel washing cylinder and a discharging conveying cylinder, wherein the feeding conveying cylinder and the discharging conveying cylinder have the same diameter, the spraying grading cylinder has the diameter larger than that of the feeding conveying cylinder, and the spraying grading cylinder is connected with the discharging conveying cylinder through a conical gravel washing cylinder;
the spiral motor is fixed at the end part of the spiral shell, the spiral shaft is movably arranged between the two ends of the spiral shell, the spiral motor drives the spiral shaft to rotate, the surface of the spiral shaft is provided with spiral blades, and the diameters of the spiral blades are matched with the diameters of all sections of the spiral shell;
the upper part of the feeding conveying cylinder is provided with a feeding hole, the feeding hole is connected with a material sieved by a wet vibrating screen, a spray head is arranged above the spray grading cylinder, the lower half part of the spray grading cylinder is provided with an overflow nozzle, a high-pressure spray nozzle is arranged above the discharge end of the gravel washing cylinder, and a gravel discharge port is arranged below the discharge conveying cylinder;
the stirring mechanism comprises a stirring shell, a stirring motor, a stirring shaft and stirring blades;
the stirring shell is fixed at the lower part of the spiral shell, the overflow nozzle is connected into the stirring shell, the bottom of the stirring shell is provided with a slurry outlet, and the slurry outlet is connected into centrifugal dehydration equipment through a sludge pump;
the stirring motor is fixed at the end part of the stirring shell, the stirring shaft is movably arranged between the two ends of the stirring shell, the stirring motor drives the stirring shaft to rotate, and stirring blades are arranged on the stirring shaft.
2. The ex-situ leaching remediation system for heavy metal contaminated soil according to claim 1, wherein the overflow nozzles are located on a circular end face of the spray grading cylinder, which is in sealed connection with the feed conveying cylinder.
3. The ex-situ leaching remediation system for heavy metal contaminated soil according to claim 1, wherein the overflow spout is located above one end of the agitator housing, and the slurry outlet is located below the other end of the agitator housing.
4. The ex-situ leaching remediation system for heavy metal contaminated soil according to claim 1, wherein a plurality of spray headers are uniformly arranged above the spraying classification barrel from the feed end to the discharge end, and the spray headers are connected with a leaching water tank through a water pump.
5. The ex-situ leaching remediation system for heavy metal contaminated soil according to claim 1, wherein the high-pressure sprayer is connected with the clean water tank through a high-pressure pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021453658.5U CN213103760U (en) | 2020-07-21 | 2020-07-21 | Heavy metal contaminated soil ectopic leaching repair system |
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| CN202021453658.5U CN213103760U (en) | 2020-07-21 | 2020-07-21 | Heavy metal contaminated soil ectopic leaching repair system |
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| CN213103760U true CN213103760U (en) | 2021-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114682618A (en) * | 2022-03-25 | 2022-07-01 | 郑州德森环境科技有限公司 | High-efficient hierarchical module that soaks of soil leaching chemistry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114682618A (en) * | 2022-03-25 | 2022-07-01 | 郑州德森环境科技有限公司 | High-efficient hierarchical module that soaks of soil leaching chemistry |
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