CN205436600U - Heavy metal contaminated soil's chemical drip washing repair equipment - Google Patents

Heavy metal contaminated soil's chemical drip washing repair equipment Download PDF

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Publication number
CN205436600U
CN205436600U CN201620248637.7U CN201620248637U CN205436600U CN 205436600 U CN205436600 U CN 205436600U CN 201620248637 U CN201620248637 U CN 201620248637U CN 205436600 U CN205436600 U CN 205436600U
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China
Prior art keywords
contaminated soil
heavy
metal contaminated
water treatment
waste water
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CN201620248637.7U
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Chinese (zh)
Inventor
郭沨
王琳玲
杜成琼
王棣
李勇
陈静
熊珊
刘德华
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China Power Construction Environmental Protection Technology Co.,Ltd.
Powerchina Zhongnan Engineering Corp Ltd
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Hunan Central-South Water Utilities Environmental Protection Technology Co Ltd
Powerchina Zhongnan Engineering Corp Ltd
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Abstract

The utility model discloses a heavy metal contaminated soil's chemical drip washing repair equipment, including hopper, combination screening system, be equipped with a material conveyer between hopper and the combination screening system, combination screening system output end is equipped with the 2nd material conveyer, and the 2nd material conveyer output is equipped with first drip washing system, and first drip washing system output is held and is connected with an effluent disposal system, and an effluent disposal system output parallel connection has the 2nd effluent disposal system and a second drip washing system, the 2nd effluent disposal system output is connected with sludge press filtration machine, second drip washing system output end is connected with the 2nd sludge press filtration machine. The utility model discloses a changeable mode of drip washing number of times has realized that a set of equipment is applicable in different contaminated site's requirement. Drip washing high efficiency, easy operation have, mobility is strong, the effect is stable, cost -effective advantage.

Description

A kind of chemical leaching prosthetic appliance of heavy-metal contaminated soil
Technical field
This utility model belongs to soil remediation equipment field, is specifically related to the chemical leaching prosthetic appliance of a kind of heavy-metal contaminated soil.
Background technology
In recent years, soil contamination problem is more and more prominent, and heavy metal pollution of soil becomes a big hidden danger of China's soil pollution especially.Heavy metal pollution source is wide, harm is big, and the productive life of people is brought adverse effect.Following China heavy metal recovery technique has huge market demand.
The common technology principle of heavy-metal contaminated soil reparation has two classes.One is by changing heavy metal occurrence patterns in soil or the combination with soil, thus reduces heavy metal animal migration in the environment and bioavailability to reduce its environmental risk, and before and after reparation, the total amount of heavy metal in soil is constant;Two is that heavy metal is gone from soil the total metals divided by reducing in soil.At present, the recovery technique of conventional heavy-metal contaminated soil mainly includes stabilisation/immobilization, chemical leaching, electrodynamics and biological restoration etc..
Soil leaching technology typically refers to by promoting that Mobility of Heavy Metals In Soil Environment dissolves or the chemical/biological reagent of migration, makes absorption or the heavy metal desorption being fixed on soil particle, dissolves the last technology removed.Soil washing is widely used in the soil that quality is of a relatively loose, permeability is stronger, can be with the stronger heavy metal element of animal migration in large clearing soil, and repairing effect is good.
If Authorization Notice No. is that CN204220613U utility model patent discloses a kind of Soil leaching equipment, which includes and successively contaminated soil is carried out the screening mechanism of respective handling, drip washing mechanism, wet sieving device, cyclone separator, heavy constituent post processing mechanism, light component post processing mechanism, different-grain diameter material can be isolated, improve washed off soil reuse ratio, alleviate the load of follow-up filter press cake, reduce mud generation amount.
But such scheme uses structures when sludge dewatering, it is impossible to realize removableization of equipment well;And only with an elution technique, when not accounting for high concentration heavy metal pollution, an elution technique does not very likely realize the removal up to standard of pollutant in soil.
Utility model content
For the problems referred to above, this utility model aims to provide that a kind of chemical leaching is efficient, simple to operate, mobility strong, effect stability, has very much the heavy-metal contaminated soil prosthetic appliance of application prospect.
This utility model solves the technical scheme of problem: the chemical leaching prosthetic appliance of a kind of heavy-metal contaminated soil, including hopper, combination screening system, it is provided with the first material conveyor between hopper and combination screening system, combination screening system outfan is provided with the second material conveyor, second material conveyor outfan is provided with the first elution circuit, first elution circuit outfan connects the first Waste Water Treatment, first Waste Water Treatment outfan is connected in parallel to the second Waste Water Treatment and the second elution circuit, described second Waste Water Treatment outfan connects the first sludge filter press, described second elution circuit outfan connects the second sludge filter press.
In such scheme, pulverizing-screening system isolates the contaminated soil of different-grain diameter.Use the technology that a drip washing or secondary drip washing comprehensively use so that high density pollution thing is separated from contaminated soil, transfers to liquid phase from solid phase.The pollutant transferred in liquid phase are processed by Waste Water Treatment, and the pollutant after filter pressing are disposed as danger is useless, up to standard after effluent reuse or arrange outward.
Concrete, described first elution circuit and the second elution circuit include rustless steel agitator tank, rustless steel stirring paddle, chemical tank, dosing pump respectively.Use stainless steel material, prevent the acid solution corrosion to equipment.
Preferably, described second elution circuit is additionally provided with the circulating line that second time ring waste can be circulated use, to reduce the usage amount of leacheate.
Described first Waste Water Treatment and the second Waste Water Treatment include respectively the removable efficient sedimentation tank for leacheate is processed, the leacheate storage tank temporarily deposited for leacheate, for realizing the air-flotation system of a leacheate solid-liquid separation after processing.
Described combination screening system includes the dry sieving device that can screen out the coarse fodder more than 10mm, will be greater than the roller-type stone washing machine that the coarse fodder of 10mm cleans up, the coarse fodder scratch pool of 10mm coarse fodder it is more than after depositing cleaning, can screen out more than 2mm and less than the wet sieving device of 10mm gravel, will be greater than 2mm and the screw sand washer cleaned up less than 10mm gravel, deposit after cleaning more than 2mm and less than the gravel scratch pool of 10mm gravel, and the hydrocyclone less than 1mm particulate can be screened out.
Preferably, described dry sieving device and wet sieving device all use linear vibrating screen.
Preferably, described first sludge filter press is chamber-type press filter, the removal of pollutant in a ring waste.Described second sludge filter press is drum concentration pressure filtration integration machine, the removal of pollutant in secondary ring waste.
The effect of above-mentioned capital equipment is as follows:
Hopper: for crushing depositing of after stain soil temporarily, and realize the quantitative of Polluted Soil.
First material conveyor: for being transported to combine screening system by the Polluted Soil after quantitatively.
Combination screening system: for isolating the Polluted Soil of different-grain diameter, carry out drip washing process with distinct device.
Second material conveyor: for the fine particle screened out is delivered in the first elution circuit carry out chemical leaching process.
First elution circuit: process for realizing a drip washing to fine particle, by adding medicament, can realize the preliminary drip washing to high density pollution thing, or realize the process up to standard to low concentration pollutant.
First Waste Water Treatment: for the solidliquid mixture of output from the first elution circuit is carried out solid-liquid separation, efficient sedimentation tank is applied in heavy-metal contaminated soil dystopy drip washing, it is achieved that removableization of settler.
Second Waste Water Treatment: for the upper strata leacheate separating generation in the first Waste Water Treatment is carried out dosing air-flotation process.
Second elution circuit: for the high density pollution soil of output in the first Waste Water Treatment is implemented secondary drip washing, to realize the process up to standard of Polluted Soil.
Chamber-type press filter: for the scum silica frost produced in the second Waste Water Treatment is carried out filter-press dehydration, the dewatered sludge obtained carries out useless landfill of endangering.
Drum concentration pressure filtration integration machine: for concentrating the solidliquid mixture of the second elution circuit output, filter pressing, to reach the effect of solid-liquid separation.
Dry sieving device: screen out the coarse fodder more than 10mm, coarse fodder passes through belt conveyer, is carried out in being transported to roller-type stone washing machine.
Roller-type stone washing machine: the coarse fodder that will be greater than 10mm cleans up, then the coarse fodder cleaned up is discharged in coarse fodder scratch pool.
Coarse fodder scratch pool: deposit the coarse fodder more than 10mm after cleaning.
Wet sieving device: screening out more than 2mm, less than the gravel of 10mm, the gravel screened out is carried out in being transported to screw sand washer.
Screw sand washer: will be greater than 2mm, the gravel less than 10mm cleans up, then is discharged in gravel scratch pool by the gravel cleaned up.
Gravel scratch pool: deposit after cleaning more than 2mm, less than the gravel of 10mm.
Hydrocyclone: screen out the particulate less than 1mm, then be sent to the first elution circuit by the second material conveyor and carry out a drip washing and process.
Removable efficient sedimentation tank: integrate mud-water separation and sludge condensation function, for the process to a leacheate.
Above-mentioned used equipment is in prior art the equipment that can directly obtain.
Remarkable result of the present utility model is:
1., for Heavy Metals in Contaminated Soils concentration or high or low problem, use the mode that drip washing number of times is variable.When heavy metal concentration is relatively low, use drip washing of medicament.When heavy metal concentration is higher, use different agents secondary drip washing.Achieve a set of equipment and be applicable to the requirement of different contaminated site.
2., when using secondary drip washing to process high concentration heavy-metal contaminated soil, second time ring waste is circulated use, decreases the usage amount of leacheate, thus greatly reduce liquid waste processing amount, decrease process costs.
3. carried out classification of soils staged care, taked drum cleaning, spiral cleaning, chemical leaching to process respectively in the different-grain diameter soil screened out, it is achieved that minimizing process, the green reparation theory of recycling.
4. sludge dewatering uses concentration pressure filtration integration machine.Compared to the tradition structures such as sedimentation tank, this one function realizes the function of sludge condensation and filter pressing simultaneously, while equipment removableization, it is achieved the precipitation of solidliquid mixture, separates, concentrate and filter pressing.
Accompanying drawing explanation
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is this utility model structural representation.
Fig. 2 is this utility model theory diagram.
In figure: 1-hopper, 2-the first material conveyor, 3-combines screening system, 4-the second material conveyor, 5-the first elution circuit, 6-the first Waste Water Treatment, 7-the second Waste Water Treatment, 8-chamber-type press filter, 9-the second elution circuit, 10-drum concentration pressure filtration integration machine.
Detailed description of the invention
As shown in Fig. 1~2, a kind of chemical leaching prosthetic appliance of heavy-metal contaminated soil, including hopper 1, combination screening system 3, it is provided with the first material conveyor 2 between hopper 1 and combination screening system 3, combination screening system 3 outfan is provided with the second material conveyor 4, second material conveyor 4 outfan is provided with the first elution circuit 5, first elution circuit 5 outfan is connected by pipeline the first Waste Water Treatment 6, first Waste Water Treatment 6 outfan is connected in parallel to the second Waste Water Treatment 7 and the second elution circuit 9 by pipeline, described second Waste Water Treatment 7 outfan connects the first sludge filter press, described second elution circuit 9 outfan connects the second sludge filter press.Described first sludge filter press is chamber-type press filter 8.Described second sludge filter press is drum concentration pressure filtration integration machine 10.
Described first elution circuit 5 and the second elution circuit 9 include rustless steel agitator tank, rustless steel stirring paddle, chemical tank, dosing pump respectively.Described second elution circuit 9 is additionally provided with the circulating line that second time ring waste can be circulated use.
Described first Waste Water Treatment 6 and the second Waste Water Treatment 7 include respectively the efficient sedimentation tank for leacheate is processed, the leacheate storage tank temporarily deposited for leacheate, for realizing the air-flotation system of a leacheate solid-liquid separation after processing.
Described combination screening system 3 includes the dry sieving device that can screen out the coarse fodder more than 10mm, will be greater than the roller-type stone washing machine that the coarse fodder of 10mm cleans up, the coarse fodder scratch pool of 10mm coarse fodder it is more than after depositing cleaning, can screen out more than 2mm and less than the wet sieving device of 10mm gravel, will be greater than 2mm and the screw sand washer cleaned up less than 10mm gravel, deposit after cleaning more than 2mm and less than the gravel scratch pool of 10mm gravel, and the hydrocyclone less than 1mm particulate can be screened out.
Described dry sieving device and wet sieving device all use linear vibrating screen.
Work process of the present utility model is as follows:
Contaminated soil is shoveled into hopper 1 by forklift, is then transported to combine screening system 3 by the first material conveyor 2 and carries out the particle diameter separation of soil, enters roller-type stone washing machine more than 10mm coarse fodder.It is clean that the pollutant on coarse fodder surface are easier drip washing, and therefore in leacheate, heavy metal concentration is relatively low, and leacheate can drip washing repeatedly.When heavy metal concentration is higher, enters the first Waste Water Treatment 6 by pipeline and process further.Fine earth after removing coarse fodder needs screening further, is separated with the gravel being wrapped in soil and finger stone by soil, and particle diameter is carried out through screw sand washer at the gravel of 1mm~10mm.
The particle diameter fine earth less than 1mm is entered by the second material conveyor and carries out drip washing process in the first elution circuit 5, leacheate is added in the agitator tank of the first elution circuit 5, it is stirred reaction simultaneously, reacted solidliquid mixture enters the first Waste Water Treatment 6 and carries out solid-liquid separation, first Waste Water Treatment 6 uses efficient precipitation device, while realizing equipment removableization, carry out the precipitation of solidliquid mixture, concentrate.
Supernatant is discharged in the second Waste Water Treatment 7 and carries out the removal of pollutant in waste liquid, to realize the recycling of leacheate.Second Waste Water Treatment 7 uses dosing air-flotation system, heavy metal ions in wastewater is removed with scum silica frost form.Again the scum silica frost cleaned out is carried out processed by chamber-type press filter 8, reduce the amount of landfill that danger is useless.
For low concentration pollution soil, implementing a drip washing can landfill up to standard.For high density pollution soil, need to carry out secondary drip washing process.The high density pollution soil of the first Waste Water Treatment 6 output is inputted by sludge pump and carries out secondary drip washing process in the second elution circuit 9, the heavy metal ion in Polluted Soil is traveled further in leacheate.In second elution circuit 9, the solidliquid mixture of output is entered in drum concentration pressure filtration integration machine 10 by sludge pump, carries out concentrating, filter pressing in all-in-one.The a small amount of ring waste given off can be back to use in the second elution circuit 9 and be continuing with.

Claims (8)

1. the chemical leaching prosthetic appliance of a heavy-metal contaminated soil, including hopper (1), combination screening system (3), it is provided with the first material conveyor (2) between hopper (1) and combination screening system (3), combination screening system (3) outfan is provided with the second material conveyor (4), it is characterized in that: the second material conveyor (4) outfan is provided with the first elution circuit (5), first elution circuit (5) outfan connects the first Waste Water Treatment (6), first Waste Water Treatment (6) outfan is connected in parallel to the second Waste Water Treatment (7) and the second elution circuit (9), described second Waste Water Treatment (7) outfan connects the first sludge filter press, described second elution circuit (9) outfan connects the second sludge filter press.
The chemical leaching prosthetic appliance of heavy-metal contaminated soil the most according to claim 1, it is characterised in that: described first elution circuit (5) and the second elution circuit (9) include rustless steel agitator tank, rustless steel stirring paddle, chemical tank, dosing pump respectively.
The chemical leaching prosthetic appliance of heavy-metal contaminated soil the most according to claim 2, it is characterised in that: described second elution circuit (9) is additionally provided with the circulating line that second time ring waste can be circulated use.
The chemical leaching prosthetic appliance of heavy-metal contaminated soil the most according to claim 1, it is characterised in that: described first Waste Water Treatment (6) and the second Waste Water Treatment (7) include respectively the removable efficient sedimentation tank for leacheate is processed, the leacheate storage tank temporarily deposited for leacheate, for realizing the air-flotation system of a leacheate solid-liquid separation after processing.
The chemical leaching prosthetic appliance of heavy-metal contaminated soil the most according to claim 1, it is characterized in that: described combination screening system (3) includes screening out the dry sieving device of the coarse fodder more than 10mm, will be greater than the roller-type stone washing machine that the coarse fodder of 10mm cleans up, the coarse fodder scratch pool of 10mm coarse fodder it is more than after depositing cleaning, can screen out more than 2mm and less than the wet sieving device of 10mm gravel, will be greater than 2mm and the screw sand washer cleaned up less than 10mm gravel, deposit after cleaning more than 2mm and less than the gravel scratch pool of 10mm gravel, and the hydrocyclone less than 1mm particulate can be screened out.
The chemical leaching prosthetic appliance of heavy-metal contaminated soil the most according to claim 5, it is characterised in that: described dry sieving device and wet sieving device all use linear vibrating screen.
The chemical leaching prosthetic appliance of heavy-metal contaminated soil the most according to claim 1, it is characterised in that: described first sludge filter press is chamber-type press filter (8).
The chemical leaching prosthetic appliance of heavy-metal contaminated soil the most according to claim 1, it is characterised in that: described second sludge filter press is drum concentration pressure filtration integration machine (10).
CN201620248637.7U 2016-03-29 2016-03-29 Heavy metal contaminated soil's chemical drip washing repair equipment Active CN205436600U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107774706A (en) * 2017-11-16 2018-03-09 安徽金联地矿科技有限公司 A kind of mining soil prosthetic device and its restorative procedure based on chemical leaching
CN108687128A (en) * 2018-06-14 2018-10-23 方碧水 A kind of soil restoring device
CN109078974A (en) * 2018-10-31 2018-12-25 Jiu株式会社 Clear-water high-pressure washed off soil repair system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107774706A (en) * 2017-11-16 2018-03-09 安徽金联地矿科技有限公司 A kind of mining soil prosthetic device and its restorative procedure based on chemical leaching
CN108687128A (en) * 2018-06-14 2018-10-23 方碧水 A kind of soil restoring device
CN109078974A (en) * 2018-10-31 2018-12-25 Jiu株式会社 Clear-water high-pressure washed off soil repair system

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CP01 Change in the name or title of a patent holder

Address after: No. 16, camphor East Road, Yuhua District, Changsha, Hunan

Patentee after: POWERCHINA ZHONGNAN ENGINEERING Corp.,Ltd.

Patentee after: China Power Construction Environmental Protection Technology Co.,Ltd.

Address before: No. 16, camphor East Road, Yuhua District, Changsha, Hunan

Patentee before: POWERCHINA ZHONGNAN ENGINEERING Corp.,Ltd.

Patentee before: Hunan Zhongnan Water Environmental Protection Technology Co.,Ltd.

CP01 Change in the name or title of a patent holder