CN106077062A - The method that a kind of soil slurry wash desorption and enrichment process - Google Patents
The method that a kind of soil slurry wash desorption and enrichment process Download PDFInfo
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- CN106077062A CN106077062A CN201610494612.XA CN201610494612A CN106077062A CN 106077062 A CN106077062 A CN 106077062A CN 201610494612 A CN201610494612 A CN 201610494612A CN 106077062 A CN106077062 A CN 106077062A
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- soil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/28—Multiple arrangement thereof for parallel flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The method that the present invention relates to the washing of a kind of underflow tandem eddy flow soil.The method is as follows: the fine soil particle suspension sieved is stirred carrying out washing treatment；Through the hydrocyclone that two sections or multistage underflow are connected, and equipped with solid-liquid blender group before cyclone system, reach to strengthen the clay pollutant removing of small particle in serosity, improve desorption ability, make underflow enrichment；Each section reaches optimum operation condition according to actual condition design corresponding construction, reduces cost, improve efficiency.Realize waste water to separate with the degree of depth of serosity bulky grain soil, reach the purpose that regenerating washing agent utilizes.Assembly of the invention parameter can adjust according to practical situation, optimize, it is achieved that to the effective removal containing the pollutant such as heavy metal, Organic substance, compensate for the deficiency of current soil washing strengthening desorption method.
Description
Technical field
The present invention relates to a kind of soil slurry wash desorption and the method for enrichment process, belong to contaminated soil heterotopic reparation neck
Territory.
Background technology
Soil is the important component part of ecological environment, along with carrying forward vigorously of government and environmental protection worker, soil pollution reparation
Importance, day by day highlight.The reason causing soil environment to deteriorate is many, such as: agricultural production, transport and stock bring
Pollution；Petroleum Production, accumulating, gas station reveals the pollution brought；Iron and steel coking industry production site pollutes；Chromic salts, rare
Pollution that the production of metal, heavy metal brings etc..Contaminated soil can penetrate into underground, carries out Pollution Plume formula by subsoil water
Diffusion, cause secondary pollution, then enter people through soil-plant system or soil-plant-animal system food chain enrichment
Body, is directly detrimental to health.Soil pollution has the features such as the seriousness of disguise, irreversibility and chronicity, impact, because of
The solution of this soil pollution is always international difficult point and hot issue.
At present, domestic and international soil remediation method mainly has physical restoration, chemical restoration and biological restoration etc., but deposits
High at cost, not thoroughly, the weak point such as cycle length, environmental influence be big.Soil leaching recovery technique is a kind of quick
Efficient physical chemistry elution technique, is also one of soil remediation method of recommending of last century end U.S. EPA.
Along with the application of technology and deepening continuously of research, researcher finds that the amount of pollutant exists with soil particle diameter distribution
Relation, be whether adsorbed in soil organic matter or with the heavy metal of soil surface functional group's misfit, pollutant mainly adhere to
Or it being adsorbed in the soil that particle diameter is less, big particle size range 2～4mm pollution level is relatively low, between 2～0.076mm median diameter soil
Soil particle is most, belongs to sandy soil, and pollution concentration is higher, is suitable for cleaning, and the clay pollution concentration less than 0.076mm is high but washs
Weak effect, need to use otherwise processed.Therefore the washing of small particle soil particle is divided by washing screening and the raising of soil
Vital effect is had for improving soil detersive efficiency reduction processing cost from efficiency.To a huge sum of money in external reparation on the spot
The sorting belonging to fine earth soil particle typically uses the methods such as the sorting of mechanical grading, waterpower, gravity separation, flotation, magnetic separation, eddy flow
Isolation technics relies on the advantage that self structure is simple, treating capacity is big, running cost is low to obtain more coming in soil washing is repaired
More it is widely applied.Eddy flow Soil leaching recovery technique is to use cyclone classification separation, leacheate to clean to remove pollution in soil
Thing, makes standard of soil environment quality reach corresponding planned land use requirement.This dystopy soil washing methods scope of application is very
Extensively, there is the advantages such as repairing efficiency is short, removal efficiency is high, easy and simple to handle simultaneously.Therefore research and development further it are worth.
For common single cyclone, first separation process may can not reach serosity and be sufficiently separated, is desorbed and increases
Dense effect.Method in parallel can only be expanded production capacity；And by the multistage single hop that is in series, single-stage multi-segment or
The a cluster cyclone of multistage multistage, can complete clarification simultaneously and concentrate two kinds of operations.It needs two or the series connection of multiple stage cyclone,
One cyclone of at least a part of which is used as concentrator, and another is as defecator.In solid-liquid cyclone, level refers to that overflow is produced
The product number of times by cleaning equipment, the multiple stage separation of hydrocyclone connected by overflow and realizes, and section refers to underflow thing
Expecting the number of times by cleaning equipment, the multistage of hydrocyclone is separated to be connected by underflow and realizes.In actual applications,
In the serosity that underflow obtains, pollutant load and water content are the highest, and in reality require obtain pollute content little,
The bottom slurry of grain granularity big (granule that granularity is little needs reaction treatment or otherwise processed the most repeatedly).So we can
To use the series connection hydrocyclone of multistage one-level formula to realize, in Soil leaching, significantly improve the quality of underflow component
With desorption efficiency, grading is obvious, and the light component of little granule is removed, and underflow receipts liquid can be dehydrated after directly clear water is washed to be filled out
Burying, abjection water can be in system reuse.Reach quickly stuffing and water-saving purpose.
Summary of the invention
In view of problem above and correlation theory, it is an object of the invention to provide a kind of skill utilizing cyclone underflow to connect
Art, with the method carrying out soil eddy flow desorption.Contaminated soil through screening stirs in agitator tank, adds eluent, it is possible to
To clean with ultrasonic device, after being sufficiently mixed reaction, make full use of that cyclone isolating construction is simple, low cost, reliability are high
Advantage, through two sections or the eddy flow washing of multistage one-level formula, finally realizes underflow waste water and separates with the degree of depth of soil particle, strengthening
In serous granule pollutant desorption with soil enrichment, it is ensured that the detergent low consumption of system, tap water recycle, good economy performance,
Do not cause and again pollute.
Concrete technical scheme is as follows:
The method that a kind of soil slurry wash desorption and enrichment process, comprises the steps:
(1) contaminated soil through Preliminary screening, the particle mass concentration that soil particle diameter is 50mm～3mm entering washing system is
More than 70%, by fine earth soil particle suspension under the sieve of preliminary screening in the first agitator tank through stirring, drip washing and/or
Ultrasound procedure so that it is be sufficiently mixed reaction desorption, controls mixing time no less than 20min.Obtain the mixed liquor of the first agitator tank；
(2) mixed liquor of the first agitator tank of step (1) being inputted Cyclonic reactor group, coutroi velocity is 2～5m/s, and solid-liquid mixes
The mass concentration closing liquid is 2～15%；Carry out carrying and sufficiently mixing, then first by continuous three solid-liquid blenders
In cyclone, eddy flow washs and separates, and control separation efficiency is more than 80%, and separation accuracy is set to 150mm；
(3) first cyclone underflows washs by eddy flow in the second cyclone and are separated, control separation efficiency 70%～85%, the
The separation accuracy of two cyclones is set to 90mm；
(4) second cyclone underflows determine hop count according to actual condition, the most again by circulation above-mentioned steps (2) and the multistage of (3)
The a cluster cyclone control overall separation efficiency of series connection is 30%～50%, and overall desorption efficiency reaches 85%～99%, and enrichment to quality is solid
60%～75% is reached containing rate；
(5) cyclone described in step (4), final separation accuracy is 50mm, to ensure that the solid-liquid that can remove drip washing again from mixes
In compound, the grain diameter solid content less than 76mm is below 3%；Until the method that soil slurry wash desorption and enrichment process is complete
Become.
Further, in described step (2), the mass concentration of solid-liquid mixed liquor is 7%～10%.
Further, the overfall of described cyclone all returning the first agitator tank containing solid overflowing liquid to continue stirring mixed out
Close reaction.
Further, the structure of described cyclone differs, and size becomes deflated state successively, controls by changing structure size
The size for the treatment of capacity processed, controls separation, grading by changing cone angle.
Further, the angle of described cone angle is 25 ° ~ 10 °.The angle of preferred cone angle is 20 °.
Further, described solid-liquid blender, internals left and right rotation direction replaces successively, strengthens disturbance.；
Further, tank bottoms being designed to all is bored the end by described agitator tank, prevents soil deposit, and the first agitator tank is drip washing tank, the
Two drip washing tanks are clean water tank.
Further, described all devices all meets anticorrosion and requirement of explosion proof.
Further, the method for hydrocyclone group in parallel is used to expand disposal ability.
The beneficial effects of the present invention is:
(1) use the series connection of multistage hydrocyclone, enhance the desorption ability of pollutant in soil serosity, compensate for single-stage eddy flow
Device can not meet the shortcoming that operation requires, additionally the most notable to the densification of serosity；
(2) use solid-liquid blender to change the fluid conveying function of common pipe into existing conveying function, have again particle reaction to wash
Wash function；
(3) whole system separation efficiency reaches high level, and underflow solid content is high, reaches the level that directly fills or only needs letter
Single-filtering can fill, and leaching waste water can reach water-saving purpose by direct reuse；
(4) for contaminated soil remediation, the method and device have that automaticity is high, controllability is high, applied widely, compact
The features such as efficiently, cleaning mixture consumption is few.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram of embodiment 1.
Symbol description:
1-1 the first agitator tank；1-2 the second agitator tank；2 slush pumps；
3-1 the first solid-liquid blender；3-2 the second solid-liquid blender；3-3 the 3rd solid-liquid blender；4-1 the first water
Power cyclone；4-2 the second hydrocyclone；4-3 the 3rd hydrocyclone.
Detailed description of the invention
Below, by embodiment, the present invention is specifically described.Be necessary it is pointed out here that, following example are only used
In the invention will be further described, it is impossible to be interpreted as limiting the scope of the invention, professional and technical personnel in the field
Some nonessential improvement and the adjustment made according to present disclosure, still fall within protection scope of the present invention.
Embodiment 1
Present inventor, through extensive and find after in-depth study, washs for contaminated soil that this treating capacity is big, place
The solid-liquid system that reason difficulty is big, most effective, cheap method is to use eddy flow washing.And in engineering, generally require strengthening serosity soil
The desorption of pollutant and enrichment process further in soil particle.For common single cyclone, first separation process may
The effect separated can not be reached.Method in parallel can only be expanded production capacity.By the multistage single hop being in series, list
Level multistage or a cluster cyclone of multistage multistage, can complete clarification simultaneously and concentrate two kinds of operations.It needs two or multiple stage
Cyclone is connected, and one cyclone of at least a part of which is used as concentrator, and another is as defecator.We can use multistage one
The series connection hydrocyclone of segmentation, in Soil leaching, significantly improves quality and the disintegrate-quality of underflow component, densification
Substantially, the light component of fine particle is removed, and underflow is received liquid and reached the level that directly fills or only need simple filtration to fill,
Leach waste water and can reach water-saving purpose by direct reuse.Finding based on above, the present invention is accomplished.
As it is shown in figure 1, it specifically includes that 1-1, the first agitator tank；1-2, the second agitator tank；2, slush pump；
3-1, the first solid-liquid blender；3-2, the second solid-liquid blender；3-3, the 3rd solid-liquid blender；4-1, the first hydraulic cyclone
Device；4-2, the second hydrocyclone；4-3, the 3rd hydrocyclone.
Contaminated soil, through screening, removes the particle diameter stone that can directly backfill more than 3mm and coarse sand, it is ensured that enter washing
The particle diameter of system be the particle mass concentration of 50mm-3mm be more than 70%, will through screening sieve under fine earth soil particle suspension
Through stirring, drip washing or increase ultrasound procedure in agitator tank 1-1 so that it is be sufficiently mixed reaction desorption, when controlling effecting reaction
Between at more than 20min.Through slush pump 2, solid-liquid mixed liquor in agitator tank 1-1 is pumped into eddy flow washing system, and coutroi velocity is
2m/s, the mass concentration of solid-liquid mixed liquor is 8%.First pass around solid-liquid blender 3-1,3-2,3-3 and be sufficiently mixed reaction successively,
Solid-liquid blender rotation direction substitutes successively, increases disturbance, improves reaction effect.In this example, solid-liquid blender 3-1,3-2,3-3
Inner member spacing is both designed as 25mm.Flow through mixture the dividing through hydrocyclone 4-1 of solid-liquid blender 3-1,3-2,3-3
Level effect, uses the structure of cone 10 ° of cone angles of section, and separation efficiency is 80%, and overflow separation accuracy is 156mm, and mean diameter is
8.4mm.Overflow enters agitator tank 1-1, continues stirring mixing and reaction.Underflow enters next section of hydrocyclone 4-2 of series connection
Separating, use the structure of 15 ° of cone angles, separation efficiency is 76%, and overflow separation accuracy is 89mm.Overflow enters agitator tank 1-1, continues
Continuous stirring mixing and reaction.Underflow enters next section of hydrocyclone 4-3 of series connection and separates, and uses the structure of 25 ° of cone angles, separates
Efficiency is 71%, and overflow separation accuracy is 80mm, and overall separation efficiency is 43.2%, and desorption efficiency reaches 98%, and enrichment effect reaches solid
Content is 64.5%.
Complete equipment run through automatic control cabinet control.
The method of a kind of underflow tandem eddy flow soil washing of the present invention, enters the fine soil particle suspension sieved
Row agitator treating processes；Through the hydrocyclone that two sections or multistage underflow are connected, and mix equipped with solid-liquid before cyclone system
Clutch group, reaches to strengthen the clay pollutant removing of small particle in serosity, improves desorption ability, make underflow enrichment；Each section of root
Operating condition design corresponding construction in border reaches optimum operation condition factually, reduces cost, improves efficiency.Realize waste water and serosity bulky grain
The degree of depth of soil separates, and reaches the purpose that regenerating washing agent utilizes.Assembly of the invention parameter can adjust according to practical situation, excellent
Change, it is achieved that to the effective removal containing the pollutant such as heavy metal, Organic substance, compensate for current soil washing strengthening desorption method
Deficiency.
Main advantages of the present invention are:
The present invention takes full advantage of hydrocyclone compact conformation, simple, and cost of investment is low, easy to operate, high excellent of reliability
Point, by underflow serial operation, is greatly improved overall desorption efficiency and separation accuracy, it is achieved that pollute in serosity soil particle
The strengthening of thing desorption, improves enrichment effect.Underflow is received liquid and is reached the level that directly fills or only need simple filtration to fill,
Leach waste water and can reach water-saving purpose by direct reuse.
Claims (10)
1. the method that soil slurry wash desorption and enrichment process, comprises the steps:
(1) contaminated soil through Preliminary screening, the particle mass concentration that soil particle diameter is 50mm～3mm entering washing system is
More than 70%, by fine earth soil particle suspension under the sieve of preliminary screening in the first agitator tank through stirring, drip washing and/or
Ultrasound procedure, controls mixing time no less than 20min so that it is is sufficiently mixed reaction desorption, obtains the mixed liquor of the first agitator tank；
(2) mixed liquor of the first agitator tank of step (1) being inputted Cyclonic reactor group, coutroi velocity is 2～5m/s, and solid-liquid mixes
The mass concentration closing liquid is 2～15%；Carry out carrying and sufficiently mixing, then first by continuous three solid-liquid blenders
In cyclone, eddy flow washs and separates, and control separation efficiency is more than 80%, and separation accuracy is set to 150mm；
(3) first cyclone underflows washs by eddy flow in the second cyclone and are separated, control separation efficiency 70%～85%, the
The separation accuracy of two cyclones is set to 90mm；
(4) second cyclone underflows determine hop count according to actual condition, the most again by circulation above-mentioned steps (2) and the multistage of (3)
The a cluster cyclone control overall separation efficiency of series connection is 30%～50%, and overall desorption efficiency reaches 85%～99%, and enrichment to quality is solid
60%～75% is reached containing rate；
(5) cyclone described in step (4), final separation accuracy is 50mm, to ensure that the solid-liquid that can remove drip washing again from mixes
In compound, the grain diameter solid content less than 76mm is below 3%；Until the method that soil slurry wash desorption and enrichment process is complete
Become.
Method the most according to claim 1, it is characterised in that in described step (2), the optimum quality of solid-liquid mixed liquor is dense
Degree is 7%～10%.
Method the most according to claim 1, it is characterised in that the overfall of described cyclone out equal containing solid overflowing liquid
Return the first agitator tank and continue stirring hybrid reaction.
Method the most according to claim 1, it is characterised in that the structure of described cyclone differs, size becomes to reduce successively
State, controls the size for the treatment of capacity by changing structure size, controls separation, grading by changing cone angle.
Method the most according to claim 4, it is characterised in that the angle of described cone angle is 25 ° ~ 10 °.
Method the most according to claim 5, it is characterised in that the optimal angle of described cone angle is 20 °.
Method the most according to claim 1, it is characterised in that described solid-liquid blender, internals left and right rotation direction is successively
Alternately, disturbance is strengthened.
Method the most according to claim 1, it is characterised in that tank bottoms being designed to all is bored the end by described agitator tank, prevents soil
Earth deposits, and the first agitator tank is drip washing tank, and the second drip washing tank is clean water tank.
Method the most according to claim 1, it is characterised in that described all devices all meets anticorrosion and requirement of explosion proof.
Method the most according to claim 1, it is characterised in that use the method expansion of hydrocyclone group in parallel to process
Ability.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199128A (en) * | 2017-05-09 | 2017-09-26 | 李尽善 | A kind of lateral feed type cyclone |
| CN107213855A (en) * | 2017-05-09 | 2017-09-29 | 李尽善 | A kind of accurate regulation and the multiphase pipe-type rotary-flow reactor of control liquid phase eddy flow flow velocity |
| CN107234009A (en) * | 2017-05-09 | 2017-10-10 | 李尽善 | A kind of axial admission type cyclone |
| CN107457257A (en) * | 2017-08-04 | 2017-12-12 | 华东理工大学 | A kind of radial direction particle wash mill |
| CN107755105A (en) * | 2017-08-04 | 2018-03-06 | 上海米素环保科技有限公司 | A kind of multitube particle wash mill |
| CN111167846A (en) * | 2020-01-19 | 2020-05-19 | 北京建工环境修复股份有限公司 | Soil leaching restoration and reduction system and construction method thereof |
| CN112845553A (en) * | 2020-12-28 | 2021-05-28 | 华东理工大学 | Method and device for restoring heavy metal contaminated soil |
| CN112845554A (en) * | 2020-12-28 | 2021-05-28 | 华东理工大学 | Method and device for reducing polluted soil |
| CN114235647A (en) * | 2021-12-17 | 2022-03-25 | 西藏华泰龙矿业开发有限公司 | Mining whirl elutriation system in laboratory |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199128A (en) * | 2017-05-09 | 2017-09-26 | 李尽善 | A kind of lateral feed type cyclone |
| CN107213855A (en) * | 2017-05-09 | 2017-09-29 | 李尽善 | A kind of accurate regulation and the multiphase pipe-type rotary-flow reactor of control liquid phase eddy flow flow velocity |
| CN107234009A (en) * | 2017-05-09 | 2017-10-10 | 李尽善 | A kind of axial admission type cyclone |
| CN107457257A (en) * | 2017-08-04 | 2017-12-12 | 华东理工大学 | A kind of radial direction particle wash mill |
| CN107755105A (en) * | 2017-08-04 | 2018-03-06 | 上海米素环保科技有限公司 | A kind of multitube particle wash mill |
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| CN111167846A (en) * | 2020-01-19 | 2020-05-19 | 北京建工环境修复股份有限公司 | Soil leaching restoration and reduction system and construction method thereof |
| CN112845553A (en) * | 2020-12-28 | 2021-05-28 | 华东理工大学 | Method and device for restoring heavy metal contaminated soil |
| CN112845554A (en) * | 2020-12-28 | 2021-05-28 | 华东理工大学 | Method and device for reducing polluted soil |
| CN114235647A (en) * | 2021-12-17 | 2022-03-25 | 西藏华泰龙矿业开发有限公司 | Mining whirl elutriation system in laboratory |
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