CN107913902A - A kind of method using the efficient rehabilitating soil of laser - Google Patents
A kind of method using the efficient rehabilitating soil of laser Download PDFInfo
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- CN107913902A CN107913902A CN201711444676.XA CN201711444676A CN107913902A CN 107913902 A CN107913902 A CN 107913902A CN 201711444676 A CN201711444676 A CN 201711444676A CN 107913902 A CN107913902 A CN 107913902A
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- soil
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- ball milling
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/06—Selection or use of additives to aid disintegrating
Abstract
The present invention relates to soil remediation technology field, and in particular to a kind of method using the efficient rehabilitating soil of laser, comprises the following steps：Contaminated soil is collected first, carries out high-energy ball milling processing, soil and soil pollutant are refined, separates soil and soil pollutant easy to the later stage；By using the high shear characteristic of engagement screws machine in the same direction, soil is disperseed in paste condition down cut, body makes the organic matter in soil fully expose, and thin slice is continuously pressed into by roller, laser irradiation is carried out in continuous conveying, so that the organic pollution in soil decomposes, the soil repaired.The efficiency of laser repairing soil greatly improved.Overcome fixed irradiation soil and easily lead to the defects of soil bonds.
Description
Technical field
The present invention relates to soil pollution technical field, and in particular to a kind of method using the efficient rehabilitating soil of laser.
Background technology
It is reported that enter about 10,000 kinds of the toxic chemical of environment at present, and there are carcinogenic, teratogenesis and mutagenic chemistry
Material has thousands of kinds, and chemical pollutant is based on organic pollution in environment, and in environment measuring, China proposes preliminary control
68 kinds of priority pollutants, wherein it is organic pollution to have 58 kinds, organic pollution has the characteristics that concentration hypotoxicity is big.In order to
Solve organic pollution migration in the environment, transformation rule, accumulation and biological effect in human body and organism, toxicity, work
Property and structural relation, remaining level etc. of degrading, then must carry out analysis measure to the organic pollution in environment.
Currently for the investigation of organic pollution in solid state medium, ground generally be directed to a certain, two class materials
Study carefully and analyze, perhaps capable justice etc. studies the Organochlorine Pesticide Residues pre-treating method in soil, but the pre-treating method is only
It is related to the organo-chlorine pesticides such as six six six in soil, DDT.
Guo Fengzhou studies the pre-treating method of gas chromatography in soil, complete soil organic matter complete point
Analysis, but this method use different extractants for different types of organic matter, after extraction concentrates and is respectively adopted different net
The defects of change method, comparativity is poor between this method easily leads to organic component, and comprehensive assessment is difficult.
The Chinese patent of Publication No. CN105910871B discloses Some Organic Pollutants in a kind of soil or deposit
Pre-treating method, comprise the following steps：1S prepares analysis sample：It is freeze-dried soil or deposit, grinding or powder after drying
The broken soil or deposit, sieve and analysis sample are made；2S extracts organic pollution：The step is extracted using organic solvent
Sample is analyzed described in 1S, fully extracts organic pollution, extracting solution is made in concentrated extract；3S preparative chromatography columns：Using wet
Method dress column method filling silica gel/alumina composite chromatography column, chromatographic column be followed successively by from top to bottom anhydrous sodium sulfate layer, alumina layer and
Layer of silica gel, and filling consolidation bubble-free in column；The chromatography column internal diameter be 8~16mm, and the aluminium oxide and silica gel of filling
Volume ratio is 1:2；4S separates organic pollution step by step：Extracting solution described in step 2S is added in chromatographic column described in step 3S
Separated, continuously eluted using seven parts of different eluant, eluents that volume is 20~80ml successively, wherein, corresponding seven parts
Eluant, eluent is followed successively by n-hexane, volume ratio 3:1 n-hexane/dichloromethane, volume ratio 1.5:1 n-hexane/dichloromethane
Alkane, volume ratio 7:13 n-hexane/dichloromethane, volume ratio 1:4 n-hexane/dichloromethane, dichloromethane, volume ratio
For 4:1 dichloromethane/acetone, wherein, it is 2~4ml/min to control eluant, eluent discharge rate.
To sum up, the recovery technique of organic pollution contaminated soil main at present has biological prosthetic, chemical remediation, physics to repair
It is multiple etc., comparatively, peripheral doses or chemical remediation have wider applicability, have especially suitable for high concentration, multicomponent
Machine contaminated site.The effect for removing the organic pollution in soil common at present is poor.Can be by soil using the high energy of laser
In pollutant decompose and remove, but since laser is difficult to continuous processing soil, irradiating soil for a long time can cause soil to bond, and
Time is too short, is difficult to effectively decompose the organic pollution in soil.Therefore the efficiency of improving laser processing soil makes laser
Key applied to soil remediation.
The content of the invention
For current laser repairing soil efficiency it is low the defects of, the present invention proposes a kind of using the efficient rehabilitating soil of laser
Method, this method have the characteristics of cleaning effect to soil pollutant is good, and cleaning cost is low.
To solve the above problems, the present invention uses following technical scheme：
A kind of method using the efficient rehabilitating soil of laser, comprises the following steps：
（1）Soil is collected, and carries out ball milling；
（2）Soil after ball milling is uniformly mixed to form paste with water；
（3）Paste is put into engagement screws machine in the same direction, screw machine from feed end to discharge end set gradually scattered orientation section,
Section is peeled off in shearing, and when screw rod is rotated with the rotating speed of 100 ~ 1200r/min, in scattered orientation section, paste is along screw rod direction of rotation
It is dispersed to open, the orientation of piece shape is formed, the organic matter in soil is fully exposed, and be gradually fed forward, peeled off in shearing
Stage activation soil；
（4）To step（3）The soil of activation is continuously pressed into thin slice by roller, and laser irradiation is carried out in continuous conveying, so that
Decompose the organic pollution in soil, the soil repaired.
In the present invention, contaminated soil is collected first, carries out high-energy ball milling processing, soil and soil pollutant is thin
Change, separate soil and soil pollutant easy to the later stage；By using the high shear characteristic of engagement screws machine in the same direction, soil is existed
Paste condition down cut disperses, and body makes the organic matter in soil fully expose, and is continuously pressed into thin slice by roller, continuous defeated
Middle progress laser irradiation is sent, so that the organic pollution in soil decomposes, the soil repaired.Laser greatly improved to repair
The efficiency of earth backing earth.Overcome fixed irradiation soil and easily lead to the defects of soil bonds.
Due to laser have it is very high can, after being irradiated to pollutant, pollutant can be decomposed, so that reaching has
Imitate the effect that clears the pollution off, and elimination efficiency is high, cost is relatively low, and using this method can cause soil dispersion uniformly,
Hard aggregation-free.
According to the present invention, soil is refined by ball milling in the present invention, the present invention is not special to the technique of ball milling
Requirement, can be one of ordinary skill in the art known to, under optimum condition, in step（1）In, the ball-milling technology is：By soil
Earth is placed in ball mill, and ball mill revolution rotating speed is the ratio 2: 1 of 400 ~ 1200r/min, ball milling autobiography rotating speed and revolution rotating speed,
Ball-milling Time is 30 ~ 90min.
According to the present invention, in order to further improve the uniformity of soil after ball milling, under optimum condition, in step（1）In, add
The mass ratio of ball adding grinding agent, the ball milling agent and the soil is 1：（15~50）.The ball milling agent is iron, ferroalloy, iron oxide
At least one of
Under optimum condition, in step（2）In, the volume ratio of the soil and the water is 1：（1-2）.
According to the present invention, the present invention can make pollution by further being sheared to soil in screw extruder
Thing is separated with soil, and soil can also be made more scattered, and easy to post laser processing, the draw ratio of the screw machine is more than
25/1st, screw diameter is 20 ~ 180mm.
Preferably, step（4）Thin slice, sheet thickness 1-2mm are continuously pressed into by roller.
According to the present invention, the pollutant decomposed in soil, under optimum condition, the laser are irradiated by laser in the present invention
Frequency be 6 × 1014~7×1014HZ。
A kind of method using the efficient rehabilitating soil of laser of the invention, compared with prior art, the characteristics of it is protruded and excellent
Different effect is：
In the present invention, contaminated soil is collected first, carries out high-energy ball milling processing, soil and soil pollutant are refined,
Soil and soil pollutant are separated easy to the later stage；By using the high shear characteristic of engagement screws machine in the same direction, by soil in cream
Shape condition down cut disperses, and body makes the organic matter in soil fully expose, and is continuously pressed into thin slice by roller, in continuous conveying
Middle progress laser irradiation, so that the organic pollution in soil decomposes, the soil repaired.Laser repairing greatly improved
The efficiency of soil.Overcome fixed irradiation soil and easily lead to the defects of soil bonds.
Embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Scope be only limitted to following example.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Ball mill used produces for Nanjing Univ. Instrument Factory, and model QM ~ QX2, ball grinder and Material quality of grinding balls are zirconium oxide.
Embodiment 1
A kind of method using the efficient rehabilitating soil of laser, comprises the following steps：
（1）Collect soil, soil and iron powder be put into ball mill, open ball mill, wherein, ball mill revolution rotating speed for 400 ~
1200r/min, the ratio 2: 1 of ball milling autobiography rotating speed and revolution rotating speed, Ball-milling Time 45min；Wherein iron powder zirconium dioxide with
The mass ratio of the soil is 1：20；
（2）By step（1）Soil after middle ball milling is uniformly mixed with water, and the mass ratio of soil and water is 1：1 is made paste；
（3）Paste is put into engagement screws machine in the same direction, screw machine from feed end to discharge end set gradually scattered orientation section,
Section is peeled off in shearing, and when screw rod is rotated with the rotating speed of 100r/min, in scattered orientation section, paste uniformly divides along screw rod direction of rotation
Scatter, form the orientation of piece shape, the organic matter in soil is fully exposed, and be gradually fed forward, stage activation is peeled off in shearing
Soil；Wherein, the draw ratio 35/1 of the screw machine, screw diameter 100mm；
（4）To step（3）The soil of activation is continuously pressed into thin slice by roller, and laser irradiation is carried out in continuous conveying, so that
Decompose the organic pollution in soil, the soil repaired.Wherein the power of laser is 6.5 × 1014HZ。
Embodiment 2
A kind of method using the efficient rehabilitating soil of laser, comprises the following steps：
（1）Soil is collected, soil and iron oxide are put into ball mill, opens ball mill, wherein, ball mill revolution rotating speed is
800r/min, the ratio 2: 1 of ball milling autobiography rotating speed and revolution rotating speed, Ball-milling Time 75min；Wherein iron oxide and the soil
Mass ratio be 1：45；
（2）By step（1）Soil after middle ball milling is uniformly mixed with water, and the mass ratio of soil and water is 1：2 are made paste；
（3）Paste is put into engagement screws machine in the same direction, screw machine from feed end to discharge end set gradually scattered orientation section,
Section is peeled off in shearing, and when screw rod is rotated with the rotating speed of 100 ~ 1200r/min, in scattered orientation section, paste is along screw rod direction of rotation
It is dispersed to open, the orientation of piece shape is formed, the organic matter in soil is fully exposed, and be gradually fed forward, peeled off in shearing
Stage activation soil；Wherein, the draw ratio 30/1 of the screw machine, screw diameter 120mm；
（4）To step（3）The soil of activation is continuously pressed into thin slice by roller, and laser irradiation is carried out in continuous conveying, so that
Decompose the organic pollution in soil, the soil repaired.Wherein the power of laser is 6.5 × 1014HZ。
Embodiment 3
A kind of method using the efficient rehabilitating soil of laser, comprises the following steps：
（1）Soil is collected, soil and ferroaluminium are put into ball mill, opens ball mill, wherein, ball mill revolution rotating speed is
1000r/min, the ratio 2: 1 of ball milling autobiography rotating speed and revolution rotating speed, Ball-milling Time 60min；Wherein iron aluminium and the soil
Mass ratio be 1：30；
（2）By step（1）Soil after middle ball milling is uniformly mixed with water, and the mass ratio of soil and water is 1：2 are made paste；
（3）Paste is put into engagement screws machine in the same direction, screw machine from feed end to discharge end set gradually scattered orientation section,
Section is peeled off in shearing, and when screw rod is rotated with the rotating speed of 100 ~ 1200r/min, in scattered orientation section, paste is along screw rod direction of rotation
It is dispersed to open, the orientation of piece shape is formed, the organic matter in soil is fully exposed, and be gradually fed forward, peeled off in shearing
Stage activation soil；Wherein, the draw ratio 40/1 of the screw machine, screw diameter 150mm；
（4）To step（3）The soil of activation is continuously pressed into thin slice by roller, and laser irradiation is carried out in continuous conveying, so that
Decompose the organic pollution in soil, the soil repaired.Wherein the power of laser is 6.3 × 1014HZ。
Embodiment 4
A kind of method using the efficient rehabilitating soil of laser, comprises the following steps：
（1）Soil is collected, soil and iron powder are put into ball mill, opens ball mill, wherein, ball mill revolution rotating speed is
400r/min, the ratio 2: 1 of ball milling autobiography rotating speed and revolution rotating speed, Ball-milling Time 30min；Wherein iron powder and the soil
Mass ratio is 1：15；
（2）By step（1）Soil after middle ball milling is uniformly mixed with water, and the mass ratio of soil and water is 1：1 is made paste；
（3）Paste is put into engagement screws machine in the same direction, screw machine from feed end to discharge end set gradually scattered orientation section,
Section is peeled off in shearing, and when screw rod is rotated with the rotating speed of 100 ~ 1200r/min, in scattered orientation section, paste is along screw rod direction of rotation
It is dispersed to open, the orientation of piece shape is formed, the organic matter in soil is fully exposed, and be gradually fed forward, peeled off in shearing
Stage activation soil；Wherein, the draw ratio 30/1 of the screw machine, screw diameter 20mm；
（4）To step（3）The soil of activation is continuously pressed into thin slice by roller, and laser irradiation is carried out in continuous conveying, so that
Decompose the organic pollution in soil, the soil repaired.Wherein the power of laser is 6 × 1014HZ。
Comparative example 1
（1）Collect with embodiment 4 with batch contaminated soil, soil and iron powder are put into ball mill, open ball mill, its
In, ball mill revolution rotating speed be 400r/min, the ratio 2: 1 of ball milling autobiography rotating speed and the rotating speed that revolves round the sun, Ball-milling Time 30min；
The mass ratio of wherein iron powder and the soil is 1：15；
（2）By step（1）Soil after middle ball milling is uniformly mixed with water, and the mass ratio of soil and water is 1：1 is made paste；
（3）To step（2）Soil is continuously pressed into thin slice by roller, laser irradiation is carried out in continuous conveying, so that soil
In organic pollution decompose, the soil repaired.Wherein the power of laser is 6 × 1014HZ。
Comparative example 2
（1）Collection is uniformly mixed with embodiment 4 with batch contaminated soil with water, and the mass ratio of soil and water is 1：1 is made cream
Shape；
（3）Paste is put into engagement screws machine in the same direction, screw machine from feed end to discharge end set gradually scattered orientation section,
Section is peeled off in shearing, and when screw rod is rotated with the rotating speed of 100 ~ 1200r/min, in scattered orientation section, paste is along screw rod direction of rotation
It is dispersed to open, the orientation of piece shape is formed, the organic matter in soil is fully exposed, and be gradually fed forward, peeled off in shearing
Stage activation soil；Wherein, the draw ratio 30/1 of the screw machine, screw diameter 20mm；
（4）To step（3）The soil of activation is continuously pressed into thin slice by roller, and laser irradiation is carried out in continuous conveying, so that
Decompose the organic pollution in soil, the soil repaired.Wherein the power of laser is 6 × 1014HZ。
Embodiment 4, comparative example the 1-2 soil repaired are subjected to emphasis organic pollution test analysis, before obtained reparation
Soil pollutant content is as shown in table 1 afterwards.
Table 1：
Claims (6)
1. a kind of method using the efficient rehabilitating soil of laser, comprises the following steps：
（1）Soil is collected, and carries out ball milling；
（2）Soil after ball milling is uniformly mixed to form paste with water；
（3）Paste is put into engagement screws machine in the same direction, screw machine from feed end to discharge end set gradually scattered orientation section,
Section is peeled off in shearing, and when screw rod is rotated with the rotating speed of 100 ~ 1200r/min, in scattered orientation section, paste is along screw rod direction of rotation
It is dispersed to open, the orientation of piece shape is formed, the organic matter in soil is fully exposed, and be gradually fed forward, peeled off in shearing
Stage activation soil；
（4）To step（3）The soil of activation is continuously pressed into thin slice by roller, and laser irradiation is carried out in continuous conveying, so that
Decompose the organic pollution in soil, the soil repaired.
A kind of 2. method using the efficient rehabilitating soil of laser according to claim 1, it is characterised in that：In step（1）In,
The ball-milling technology is：Soil is placed in ball mill, ball mill revolution rotating speed is 400 ~ 1200r/min, ball milling autobiography rotating speed
With the ratio 2: 1 for the rotating speed that revolves round the sun, Ball-milling Time is 30 ~ 90min.
A kind of 3. method using the efficient rehabilitating soil of laser according to claim 1, it is characterised in that：In step（1）In,
Add ball milling agent in the ball milling, the mass ratio of ball milling agent and the soil is 1：（15~50）, wherein, the ball milling agent for iron,
At least one of ferroalloy, iron oxide.
A kind of 4. method using the efficient rehabilitating soil of laser according to claim 1, it is characterised in that：In step（2）In,
The volume ratio of the soil and the water is 1：（1-2）.
A kind of 5. method using the efficient rehabilitating soil of laser according to claim 1, it is characterised in that：The screw machine
It is 20 ~ 180mm that draw ratio, which is more than 25/1, screw diameter,.
A kind of 6. method using the efficient rehabilitating soil of laser according to claim 1, it is characterised in that：Step（4）Pass through
Roller is continuously pressed into thin slice, sheet thickness 1-2mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711444676.XA CN107913902A (en) | 2017-12-27 | 2017-12-27 | A kind of method using the efficient rehabilitating soil of laser |
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| CN201711444676.XA CN107913902A (en) | 2017-12-27 | 2017-12-27 | A kind of method using the efficient rehabilitating soil of laser |
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| JP2003103249A (en) * | 2001-09-28 | 2003-04-08 | Seon:Kk | Method and system for treatment of soil, etc., contaminated by organochlorine compound |
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| JP2005131571A (en) * | 2003-10-31 | 2005-05-26 | Toyo Ink Mfg Co Ltd | Manufacturing method of soil cleaning agent |
| CN203526195U (en) * | 2013-08-02 | 2014-04-09 | 重庆远传环保科技有限公司 | Complete equipment for restoring polluted soil |
| CN103894405A (en) * | 2014-03-12 | 2014-07-02 | 中国科学院南京土壤研究所 | Method for processing high-concentration organic compound polluted soil by adopting iron-zinc bimetallic mechanochemical ball milling |
| CN103978023A (en) * | 2014-04-18 | 2014-08-13 | 浙江大学 | Device for restoration of persistent organic pollutant-polluted soil and use method thereof |
| CN104070056A (en) * | 2014-06-06 | 2014-10-01 | 浙江省环境保护科学设计研究院 | Stabilizing processing method of heavy metal contaminated soil |
| CN104525123A (en) * | 2014-12-12 | 2015-04-22 | 格丰科技材料有限公司 | Porous composite material for removing heavy metals in soil and preparation method thereof |
-
2017
- 2017-12-27 CN CN201711444676.XA patent/CN107913902A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103249A (en) * | 2001-09-28 | 2003-04-08 | Seon:Kk | Method and system for treatment of soil, etc., contaminated by organochlorine compound |
| JP2004024942A (en) * | 2002-06-21 | 2004-01-29 | Maeda Corp | Cleaning method of contaminated matter and cleaning apparatus used for the same |
| JP2005131571A (en) * | 2003-10-31 | 2005-05-26 | Toyo Ink Mfg Co Ltd | Manufacturing method of soil cleaning agent |
| CN203526195U (en) * | 2013-08-02 | 2014-04-09 | 重庆远传环保科技有限公司 | Complete equipment for restoring polluted soil |
| CN103894405A (en) * | 2014-03-12 | 2014-07-02 | 中国科学院南京土壤研究所 | Method for processing high-concentration organic compound polluted soil by adopting iron-zinc bimetallic mechanochemical ball milling |
| CN103978023A (en) * | 2014-04-18 | 2014-08-13 | 浙江大学 | Device for restoration of persistent organic pollutant-polluted soil and use method thereof |
| CN104070056A (en) * | 2014-06-06 | 2014-10-01 | 浙江省环境保护科学设计研究院 | Stabilizing processing method of heavy metal contaminated soil |
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