CN204247681U - A kind of heavy-metal contaminated soil treatment facility - Google Patents
A kind of heavy-metal contaminated soil treatment facility Download PDFInfo
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- CN204247681U CN204247681U CN201420305696.4U CN201420305696U CN204247681U CN 204247681 U CN204247681 U CN 204247681U CN 201420305696 U CN201420305696 U CN 201420305696U CN 204247681 U CN204247681 U CN 204247681U
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Abstract
The utility model discloses a kind of heavy-metal contaminated soil treatment facility, comprise soil crusher, drip washing cylinder, rotary screen, vibratory sieve, secondary cyclone, sedimentation basin, storage cistern, dewatering screen and sludge concentration tank, wherein, output stable connection treatment facility and the secondary cyclone respectively of dewatering screen and vibratory sieve, secondary cyclone upper, bottom connects sedimentation basin and dewatering screen respectively, sedimentation basin circulation connection first filter press, the output also stable connection treatment facility of the first filter press, sludge concentration tank circulation connection second filter press, the output of the second filter press also connects reclaimer, the output of storage cistern connects drip washing cylinder.By the way, a kind of heavy-metal contaminated soil treatment facility of the utility model can be removed the heavy metal in contaminated soil by elution technique and sizing screening and by its high enrichment, make it to reach safety standard.
Description
Technical field
The utility model relates to contaminated soil and administers and recovery technique field, particularly relates to a kind of heavy-metal contaminated soil treatment facility.
Background technology
Existing heavy metal-polluted soil control expense is high, and the cycle of administering is long, and the pollutant after administering is difficult to carry out safe recycling.At present, domestic many places are administered in the research of eluent and ELUTION METHOD and experimental provision exploratory stage to heavy metal-polluted soil, also little for industrialized large-scale production Journal of Sex Research, wherein, Chinese patent application CN201310225512.3, " heavy metal pollution place soil leaching repairing method and equipment " discloses a kind of soil remediation method processing heavy metal pollution, heavy metal contaminants is separated by the method for physical separation and chemical extraction by the method, and leacheate is reusable, there is certain soil treatment effect, but this invention is in effective utilization of soil resource, drawing materials of chemical reagent, leacheate uses the number of link, the concentration technique of soil, the raising of large-scale industrial production technological level and in the link such as cost and economic benefit, still Shortcomings, need to improve.
Summary of the invention
The technical problem that the utility model mainly solves is to provide a kind of heavy-metal contaminated soil treatment facility, is departed from by the heavy metal be attached on soil particle by elution technique, can by heavy-metal contaminated soil high enrichment by sizing screening.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: provide a kind of heavy-metal contaminated soil treatment facility, comprise soil crusher, drip washing cylinder, rotary screen, vibratory sieve, secondary cyclone, sedimentation basin, storage cistern, dewatering screen and sludge concentration tank, also comprise the first filter press and the second filter press that circulation respectively connects described sedimentation basin and described sludge concentration tank, the input of described soil crusher connects conveyer, and connect the input of described drip washing cylinder at output by conveyer, the output of described drip washing cylinder connects the input of described rotary screen, the output of described rotary screen connects conveyer and pipeline respectively, pipeline connects the input of described vibratory sieve, the output of described vibratory sieve is respectively arranged with the conveyer of stable connection treatment facility and is connected the band pump line road of described secondary cyclone, described secondary cyclone is provided with the pipeline connecting sedimentation basin at an upper portion thereof, and bottom it, be provided with the pipeline connecting described dewatering screen, the output of described dewatering screen is respectively arranged with the conveyer of stable connection treatment facility and is connected the band pump line road of secondary cyclone, the output of described sedimentation basin is respectively arranged with the band pump line road of connection first filter press and is connected the band pump line road of described sludge concentration tank, the output of described first filter press is respectively arranged with the conveyer of stable connection treatment facility and the pipeline being connected described sedimentation basin, the output of described sludge concentration tank is respectively arranged with the pipeline connecting described storage cistern and the band pump line road being connected the second filter press, the output of described second filter press is respectively arranged with the conveyer and the pipeline being connected described sludge concentration tank that connect reclaimer, the output of described storage cistern is provided with the band pump line road connecting described drip washing cylinder.
In the utility model preferred embodiment, the aperture of described rotary screen is 20mm.
In the utility model preferred embodiment, the aperture of described vibratory sieve is 2mm.
In the utility model preferred embodiment, the aperture of described dewatering screen is 0.075mm.
The beneficial effects of the utility model are: a kind of heavy-metal contaminated soil treatment facility of the utility model can be administered by cost-effective heavy metal contaminated soil by Soil leaching and heavy metal enrichment method, administer and thoroughly also can reach safety standards, and financial cost is low, applied widely, basis can be done for follow-up heavy metal in soil extraction or recycling.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of a preferred embodiment of a kind of heavy-metal contaminated soil treatment facility of the utility model.
In accompanying drawing, the mark of each parts is as follows: 1, soil crusher, and 2, drip washing cylinder, 3, rotary screen, 4, vibratory sieve, 5, secondary cyclone, 6, sedimentation basin, 7, dewatering screen, 8, sludge concentration tank, 91, the first filter press, the 92, second filter press, 10, storage cistern.
Detailed description of the invention
Be clearly and completely described to the technical scheme in the utility model embodiment below, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, the utility model embodiment comprises:
A kind of heavy-metal contaminated soil treatment facility, comprise soil crusher 1, drip washing cylinder 2, rotary screen 3, vibratory sieve 4, secondary cyclone 5, sedimentation basin 6, storage cistern 10, dewatering screen 7 and sludge concentration tank 8, also comprise circulation respectively and connect the first filter press 91 and the second filter press 92 of described sedimentation basin 6 and described sludge concentration tank 8, the input of described soil crusher 1 connects conveyer, and connect the input of described drip washing cylinder 2 at output by conveyer, the output of described drip washing cylinder 2 connects the input of described rotary screen 3, the output of described rotary screen 3 connects conveyer and pipeline respectively, wherein, pipeline connects the input of described vibratory sieve 4, the output of described vibratory sieve 4 is respectively arranged with the conveyer of stable connection treatment facility and is connected the band pump line road of described secondary cyclone 5, described secondary cyclone 5 is provided with the pipeline connecting sedimentation basin 6 at an upper portion thereof, and bottom it, be provided with the pipeline connecting described dewatering screen 7, the output of described dewatering screen 7 is respectively arranged with the conveyer of stable connection treatment facility and is connected the band pump line road of secondary cyclone 5, the output of described sedimentation basin 6 is respectively arranged with the band pump line road of connection first filter press 91 and is connected the band pump line road of described sludge concentration tank 8, the output of described first filter press 91 is respectively arranged with the conveyer of stable connection treatment facility and the pipeline being connected described sedimentation basin 6, the output of described sludge concentration tank 8 is respectively arranged with the pipeline connecting described storage cistern 10 and the band pump line road being connected the second filter press 92, the output of described second filter press 92 is respectively arranged with the conveyer and the pipeline being connected described sludge concentration tank 8 that connect reclaimer, the output of described storage cistern 10 is provided with the band pump line road connecting described drip washing cylinder 2.
The aperture of described rotary screen 3 is 20mm.
The aperture of described vibratory sieve 4 is 2mm.
The aperture of described dewatering screen 7 is 0.075mm, and its effect is identical with vibratory sieve 4.
Adopt heavy-metal contaminated soil treatment facility to carry out heavy-metal contaminated soil drip washing and heavy metal enrichment method to contaminated soil, comprise the following steps:
1) pretreatment: in soil crusher 1, carries out fragmentation to contaminated soil and impurity thereof, then the soil after fragmentation is delivered to drip washing cylinder 2;
2) drip washing: in drip washing cylinder 2, contaminated soil is pulverized, add eluent simultaneously, the drip washing time is 10-30 minute, is delivered to rotary screen 3 afterwards;
3) rotating separation: in rotary screen 3, rotates, and isolates containing being greater than the soil of 20mm particle and being less than the Soil slurry of 20mm particle, is delivered to vibratory sieve 4 by containing the Soil slurry being less than 20mm particle;
4) Separation by vibration: in vibratory sieve 4, vibration, isolate the soil containing 2-20mm particle, the mud after separation is transported to secondary cyclone 5 by pump, can be used as cleaning soil and carry out the utilization of resources after the soil containing 2-20mm particle is carried out stabilization processes as requested;
5) classification: in secondary cyclone 5, rotates, and the fine grained soil lighter to proportion in mud and the larger coarse-grained soil of proportion carry out classification, and after classification, the fine grained Soil slurry that upper strata proportion is lighter enters sedimentation basin 6, namely enters step (6); The coarse-grained soil mud that lower floor's proportion is larger enters dewatering screen 7, namely enters step (7);
6) precipitate: in sedimentation basin 6, by supernatant (soil particle containing being less than 0.001mm) by transport pump to sludge concentration tank 8, namely enter step (8); By the soil that is deposited on bottom pond by transport pump to the first filter press 91, by filtering to isolate the soil containing 0.001-0.075mm particle, can be used as cleaning soil after soil containing 0.001-0.075mm particle is carried out stabilization processes as requested and carry out the utilization of resources, filtrate delivers to sedimentation basin 6 by looping back;
7) dewater: in dewatering screen 7, isolate the soil containing 0.075-2mm particle, isolated soil can be used as cleaning soil and carries out the utilization of resources after carrying out stabilization processes as requested, isolated mud is circulated by pump and is delivered to secondary cyclone 5, namely enters step (5);
8) sludge condensation: in sludge concentration tank 8, adds heavy metals removal agent, coagulant and flocculation aid and carries out sludge condensation, isolate mud and supernatant, supernatant is imported storage cistern 10, enters step (9); Imported by base sludge in the second filter press 92 and filter, the liquid-circulating after filtration enters sludge concentration tank 8, and the mud after filtration carries out resource recycling, recycles and comprises extraction heavy metal wherein or carry out landfill;
9) recycle-water: the liquid in storage cistern 10 by transport pump to drip washing cylinder 2.
Eluent in step (2) is clear water or low concentration acid, and described low concentration acid is at least one in nitric acid, sulfuric acid, hydrochloric acid, phosphoric acid and the nitrous acid after dilution.
The input ratio of described eluent and contaminated soil is 2:1-5:1, and when described eluent is low concentration acid, the pH value of described low concentration acid is 3-5.
Described heavy metals removal agent is at least one in potassium sulfide, ammonium sulfide, caustic soda, calcium hydroxide, sodium carbonate, brium carbonate and barium chloride.
Described coagulant is at least one in aluminum sulfate, ferric trichloride, ferrous sulfate, magnesium sulfate, ferrous sulfide, aluminium polychloride, polymeric iron, alum.
Described flocculation aid is at least one in polyacrylamide, polypropylene, active silicic acid, sodium alginate, sodium carboxymethylcellulose, polypropylene amine, phosphoric acid.
Specific embodiment 1:
Contaminated soil after testing, at the soil that particle diameter is within the scope of 0.15-2mm, mass percent is 100%, lead tolerance is 670mg/kg, by the effect of the drip washing of heavy-metal contaminated soil drip washing and heavy metal enrichment method, rotating separation, Separation by vibration and dewatering screen 7, obtaining the soil that particle diameter is greater than 0.075mm particle, obtaining the soil containing being less than 0.075mm particle by the grading of step (5), in fact particle diameter is the soil of 0.001-0.075mm particle;
Containing the soil being greater than 0.075mm particle, its mass percent is 66.9%, lead tolerance is 130mg/kg, lower than " exhibition land used evaluation criteria of soil environment quality " (HJ350-2007) A grade standard (140mg/kg), after isolated soil can being carried out stabilization processes as requested, carry out the utilization of resources as cleaning soil;
Containing the soil being less than 0.075mm particle, its mass percent is 33.1%, and lead tolerance is 2286mg/kg, higher than environmental standard, sent into next step classifying equipoment, be precipitated thing by the precipitation of sedimentation basin 6, obtained mud by the sludge condensation effect of sludge concentration tank 8;
Sedimentary mass percent is 32.8%, and lead tolerance is 505mg/kg, carries out the utilization of resources after carrying out stabilization processes as requested as cleaning soil;
The mass percent of mud is 0.3%, and lead tolerance is 223000mg/kg, can carry out the recycling of high-grade soil resource as requested, recycles and comprises extraction heavy metal wherein or carry out the operations such as landfill.
Specific embodiment 2:
Contaminated soil after testing, at the soil that particle diameter is within the scope of 0.15-2mm, mass percent is 100%, selenium content is 59mg/kg, by the effect of the drip washing of heavy-metal contaminated soil drip washing and heavy metal enrichment method, rotating separation, Separation by vibration and dehydration, obtaining the soil that particle diameter is greater than 0.075mm particle, obtaining the soil containing being less than 0.075mm particle by the grading of step (5), in fact particle diameter is the soil of 0.001-0.075mm particle;
Containing the soil being greater than 0.075mm particle, its mass percent is 65.9%, selenium content is less than 5mg/kg, lower than " exhibition land used evaluation criteria of soil environment quality " (HJ350-2007) A grade standard (39mg/kg), after isolated soil can being carried out stabilization processes as requested, carry out the utilization of resources as cleaning soil;
Containing the soil being less than 0.075mm particle, its mass percent is 34.1%, and selenium content is 174mg/kg, higher than environmental standard, sent into next step classifying equipoment, be precipitated thing by the precipitation of sedimentation basin 6, obtained mud by the sludge condensation effect of sludge concentration tank 8;
Sedimentary mass percent is 33.8%, and selenium content is 17mg/kg, lower than environmental standard, carries out the utilization of resources after carrying out stabilization processes as requested as cleaning soil;
The mass percent of mud is 0.3%, and selenium content is 17400mg/kg, can carry out the recycling of high-grade soil resource as requested, recycles and comprises extraction heavy metal wherein or carry out the operations such as landfill.
Sum up: by the data analysis of above-mentioned two embodiments, can find out by multiple fractionation effect of the present invention, effectively heavy metal in soil resource can be carried out progressively and be effectively separated, classification each time produce soil can carry out stabilization processes as requested after carry out the utilization of resources as cleaning soil; The mud in the end obtained can also carry out source recycling, effectively improves the utilization rate of resource.
The beneficial effect of a kind of heavy-metal contaminated soil treatment facility of the present invention is:
One, the invention has the beneficial effects as follows: by elution technique, the heavy metal be attached on soil particle is departed from, can by heavy-metal contaminated soil high enrichment by sizing screening, soil after cleaning reaches environmental quality standards and safety standard completely, can carry out recycling or security landfill;
Two, administer with common contaminated soil and compare with recovery technique, there is safe and effective, that cost is low, resource utilization is high and applied widely feature, and can lay a solid foundation for follow-up heavy metal in soil extraction or recycling, this technology can also consider the recycling of resource in treatment system fully, good economy performance.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model description to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (4)
1. a heavy-metal contaminated soil treatment facility, it is characterized in that, comprise soil crusher, drip washing cylinder, rotary screen, vibratory sieve, secondary cyclone, sedimentation basin, storage cistern, dewatering screen and sludge concentration tank, also comprise the first filter press and the second filter press that circulation respectively connects described sedimentation basin and described sludge concentration tank, the input of described soil crusher connects conveyer, and connect the input of described drip washing cylinder at output by conveyer, the output of described drip washing cylinder connects the input of described rotary screen, the output of described rotary screen connects conveyer and pipeline respectively, pipeline connects the input of described vibratory sieve, the output of described vibratory sieve is respectively arranged with the conveyer of stable connection treatment facility and is connected the band pump line road of described secondary cyclone, described secondary cyclone is provided with the pipeline connecting sedimentation basin at an upper portion thereof, and bottom it, be provided with the pipeline connecting described dewatering screen, the output of described dewatering screen is respectively arranged with the conveyer of stable connection treatment facility and is connected the band pump line road of secondary cyclone, the output of described sedimentation basin is respectively arranged with the band pump line road of connection first filter press and is connected the band pump line road of described sludge concentration tank, the output of described first filter press is respectively arranged with the conveyer of stable connection treatment facility and the pipeline being connected described sedimentation basin, the output of described sludge concentration tank is respectively arranged with the pipeline connecting described storage cistern and the band pump line road being connected the second filter press, the output of described second filter press is respectively arranged with the conveyer and the pipeline being connected described sludge concentration tank that connect reclaimer, the output of described storage cistern is provided with the band pump line road connecting described drip washing cylinder.
2. heavy-metal contaminated soil treatment facility according to claim 1, is characterized in that, the aperture of described rotary screen is 20mm.
3. heavy-metal contaminated soil treatment facility according to claim 1, is characterized in that, the aperture of described vibratory sieve is 2mm.
4. heavy-metal contaminated soil treatment facility according to claim 1, is characterized in that, the aperture of described dewatering screen is 0.075mm.
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| CN201420305696.4U CN204247681U (en) | 2014-06-10 | 2014-06-10 | A kind of heavy-metal contaminated soil treatment facility |
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| CN201420305696.4U CN204247681U (en) | 2014-06-10 | 2014-06-10 | A kind of heavy-metal contaminated soil treatment facility |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105057340A (en) * | 2015-07-31 | 2015-11-18 | 三川德青科技有限公司 | Chromium-contaminated soil different-position leaching repairing technology and device |
| CN105349779A (en) * | 2015-10-10 | 2016-02-24 | 中冶北方（大连）工程技术有限公司 | Iron ore concentrate potassium and sodium removing system and method with seawater as beneficiation medium |
| CN105419808A (en) * | 2015-11-17 | 2016-03-23 | 博天环境集团股份有限公司 | Eluting agent for repairing heavy metal polluted soil and application method thereof |
| CN105945060A (en) * | 2016-06-02 | 2016-09-21 | 朱辉 | Biological fermentation soil restoration method for removing heavy metal lead |
| CN105964667A (en) * | 2016-06-02 | 2016-09-28 | 朱辉 | Soil remediation method for removing heavy metal lead |
| CN106881342A (en) * | 2017-03-23 | 2017-06-23 | 湖北保灵华环保科技有限公司 | A kind of heavy-metal contaminated soil drip washing repair system and method |
| CN108687128A (en) * | 2018-06-14 | 2018-10-23 | 方碧水 | A kind of soil restoring device |
| CN109365502A (en) * | 2018-12-18 | 2019-02-22 | 智优株式会社 | Polluted soil wash mill |
| CN111842447A (en) * | 2020-07-24 | 2020-10-30 | 吴斌 | Environment-friendly soil pollution detoxification treatment equipment |
| CN112845562A (en) * | 2020-12-17 | 2021-05-28 | 李小林 | Soil remediation and improvement method based on selenium enrichment technology |
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- 2014-06-10 CN CN201420305696.4U patent/CN204247681U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057340A (en) * | 2015-07-31 | 2015-11-18 | 三川德青科技有限公司 | Chromium-contaminated soil different-position leaching repairing technology and device |
| CN105057340B (en) * | 2015-07-31 | 2018-05-22 | 三川德青科技有限公司 | A kind of chromium-polluted soil dystopy elution renovation technique and its device |
| CN105349779A (en) * | 2015-10-10 | 2016-02-24 | 中冶北方（大连）工程技术有限公司 | Iron ore concentrate potassium and sodium removing system and method with seawater as beneficiation medium |
| CN105419808A (en) * | 2015-11-17 | 2016-03-23 | 博天环境集团股份有限公司 | Eluting agent for repairing heavy metal polluted soil and application method thereof |
| CN105945060A (en) * | 2016-06-02 | 2016-09-21 | 朱辉 | Biological fermentation soil restoration method for removing heavy metal lead |
| CN105964667A (en) * | 2016-06-02 | 2016-09-28 | 朱辉 | Soil remediation method for removing heavy metal lead |
| CN105945060B (en) * | 2016-06-02 | 2019-01-01 | 中水卫士生态科技有限公司 | A kind of biofermentation soil remediation method removing heavy metal lead |
| CN106881342A (en) * | 2017-03-23 | 2017-06-23 | 湖北保灵华环保科技有限公司 | A kind of heavy-metal contaminated soil drip washing repair system and method |
| CN108687128A (en) * | 2018-06-14 | 2018-10-23 | 方碧水 | A kind of soil restoring device |
| CN109365502A (en) * | 2018-12-18 | 2019-02-22 | 智优株式会社 | Polluted soil wash mill |
| CN111842447A (en) * | 2020-07-24 | 2020-10-30 | 吴斌 | Environment-friendly soil pollution detoxification treatment equipment |
| CN112845562A (en) * | 2020-12-17 | 2021-05-28 | 李小林 | Soil remediation and improvement method based on selenium enrichment technology |
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