CN104550217B - Controlling device and method of polluted soil electrokinetic remediation field intensity based on current compensation - Google Patents
Controlling device and method of polluted soil electrokinetic remediation field intensity based on current compensation Download PDFInfo
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Abstract
The invention relates to a controlling device and a controlling method of polluted soil electrokinetic remediation field intensity based on current compensation, and is realized in such a way that main electrode matrixes and current compensation matrixes are distributed in a staggered way at equal spaces. The main electrode matrixes are distributed in an equal space grid of M*N (M is more than or equal to 2, and N is more than or equal to 2); through periodic polarity switching, the full coverage of the electric field intensity of electrokinetic remediation areas is realized, and the attenuation of the electric field intensity can be caused due to electrokinesis; the array of the compensation electrode is a grid matrix of (M-1)*(N-1), and the compensation electrode and the matrix electrode matrixes are distributed in a staggered way at equal spaces; when the field intensity attenuation rate of a monitoring area in the main electrode matrix is more than or equal to 20 percent, the compensation electrode corresponding to the main electrode in the area is started, and the polarities of the compensation electrode and the main electrode are opposite; the electric field intensity is controlled by means of current compensation. According to the controlling device and the controlling method, the problem of the attenuation of the field intensity in the electrokinetic remediation process is solved, and the integral remediation efficiency of the polluted soil is improved.
Description
Technical field
The present invention relates to Electrokinetic Remediation of Polluted Soils technical field, specifically the contaminated soil based on current compensation is electronic
Repair field intensity regulation device and method.
Background technology
Electric repair method contaminated soil is a kind of emerging technology at present.During existing electro reclamation, by electrode
It is inserted in contaminated soil, forms electrode matrix, apply faint direct current electric forming electric field.In electrochemical reaction and electrokinesis
Under synergy, can effectively remove the pollutant in soil.
M × N number of matrix electrodes isometric net arrangement is utilized, by the polarity of periodic anode and cathode during early-stage Study
Switching, forms asymmetric electric field it is achieved that all standing (CN 102294350B) of electric field effective district.And electric field intensity is as pollution
The core index of soil electric repairing technique efficiency, directly affects the removal efficiency (Liet al., 2014) of pollutant in soil.
But during Electrokinetic Remediation of Polluted Soils, the electrokinesis such as the electrolysis of the soil water, electromigration of ion, all causes soil electric-field strength
Degree change, or even continuous decay, electrokinetic remediation efficiency is thus decrease.Additionally, the inhomogeneity of soil media, and inhomogeneity
The difference of type soil physico-chemical property, all can cause the decay of electric field intensity.
Mode as how current compensation realizes the regulation and control of electric field intensity, makes up electric field intensity decay during electro reclamation
Defect, to maintain Electrokinetic Remediation of Polluted Soils efficiency high efficiency be significant.
Content of the invention
For realizing the field intensity regulation and control during electro reclamation, during solving the problems, such as electro reclamation, electric field intensity decays,
Maintain the high efficiency of Electrokinetic Remediation of Polluted Soils efficiency, there is provided the Electrokinetic Remediation of Polluted Soils field intensity regulation and control based on current compensation
Apparatus and method.
The present invention be employed technical scheme comprise that for achieving the above object：A kind of contaminated soil based on current compensation is electronic
Repair field intensity regulation device, including：
Main electrode matrix, including multiple main electrodes of latticed laying, by the opening of time controller control relay/
Closure, and then control each polarity of electrode, keep the main electrode polarity of same diagonal identical, the master in adjacent diagonal line direction
Polarity of electrode is different；
DC source, by relay and time controller, connects each electrode in main electrode matrix, for main electricity
Pole matrix is powered；
Very first time controller TC1, by being connected of the first relay KA1 and the second relay KA2 and DC source, defeated
Go out end to be connected with all of main electrode on interval diagonal in main electrode matrix, for controlling the first relay KA1 and second to continue
The opened/closed of electrical equipment KA2, and then coordination electrode polarity；
Second time controller TC2, by being connected of the 3rd relay KA3 and the 4th relay KA4 and DC source, defeated
Go out end and connect the diagonally adjacent main electrode in other interval in main electrode matrix, for controlling the 3rd relay KA3 and the 4th
The opened/closed of relay KA4, and then coordination electrode polarity；
Current compensation electrode matrix, including multiple compensating electrodes, each compensating electrode is laid in main electrode matrix by phase
The central spot of the minimum unit of adjacent four electrodes composition；
Compensate power supply, each compensating electrode in current compensation electrode matrix is connected by the 3rd time controller TC3, use
In powering to current compensation electrode matrix；
3rd time controller TC3, by the 5th relay KA5 and the 6th relay KA6 and being connected of compensating power supply, defeated
Go out end to be connected with each electrode of current compensation matrix, for control the opening of the 5th relay KA5 and the 6th relay KA6/
Closure, and then the polarity of control and compensation electrode；
Field intensity monitor passes through to lay field intensity monitoring probe in main electrode with compensating electrode centre position, monitors electric field intensity
Attenuation rate changes, and judges whether that starting the 3rd time controller TC3 carries out current compensation.
Described main electrode matrix adopts isometric net to lay.
The voltage range of described DC source is 20V～36V.
The described voltage range compensating power supply is 20V～36V.
Described field intensity detector monitors the electric field intensity change of described monitoring point, when electric field intensity attenuation rate >=20%,
Start the 3rd time controller TC3, powered for current compensation electrode matrix by compensating power supply, realize current compensation, enhancing refers to
Determine the electric field intensity in region.
A kind of Electrokinetic Remediation of Polluted Soils field intensity regulation and control method based on current compensation, comprises the following steps：
Under main electrode matrix polarity switching pattern, by very first time controller TC1 control relay, make one diagonally
Main electrode polarity on line direction is identical；By the second time controller TC2 control relay, keep another diagonal
On main electrode polarity identical；And keep adjacent diagonal line main electrode opposite polarity；
The opened/closed time of setting very first time controller TC1 and the second time controller TC2 is identical, makes first to continue
Electrical equipment KA1 and the 4th relay KA4 closing time are synchronous, and the second relay KA2 and the 3rd relay KA3 closing time are synchronous,
First relay KA1, the 4th relay KA4 are asynchronous with the second relay KA2, the 3rd relay KA3 closing time, and then between making
Different every diagonally adjacent main electrode polarity；
Opened/closed time and the very first time controller of the 3rd time controller TC3, under compensating electrode pattern, are set
TC1, the second time controller TC2 are identical, keep the 5th relay KA5 different with the relay closing time of corresponding compensatory zone
Step, the 6th relay KA6 is synchronous with the relay closing time of corresponding compensatory zone, makes the pole of compensating electrode and corresponding main electrode
Property is contrary；
When monitoring section electric field intensity attenuation rate >=20%, start compensating electrode pattern, by the 3rd time controller
TC3, makes current compensation electrode matrix connect and compensates power supply, keeps the compensating electrode on a diagonal and the master on this diagonal
Polarity of electrode is identical/and different and different from the compensating electrode polarity on another diagonal/identical.
The present invention has advantages below and beneficial effect：
1. the compensation electric current being formed between compensating electrode and corresponding main electrode, it is possible to resolve the attenuation problem of local electric field strength,
Thus improving the overall remediation efficiency of electro reclamation.
2. main electrode matrix and compensating electrode matrix are equidistantly laid staggeredly mode, have ensured that the electric current to arbitrary region is mended
Repay, thus regulating and controlling the field intensity size of electro reclamation overall region.
Brief description
Fig. 1 is apparatus of the present invention composition schematic diagram；Wherein, electrode matrix based on 1,2 is DC source, and 3 is the very first time
Controller TC1,4 is the second time controller TC2, and 5 is current compensation electrode matrix, and 6 is to compensate power supply, and 7 is the control of the 3rd time
Device TC3 processed, 8 is field intensity monitor, and 9 is main electrode and compensating electrode centre position；
Fig. 2 is the electrode arranging structure connection diagram of 2 × 2 main electrode matrixes and current compensation electrode；
Fig. 3 is 2 × 2 main electrode matrix polarity switching patterns and current compensation schematic diagram；
Fig. 4 is 2 × 2 main electrode matrixes and compensating electrode matrix polarity switching flow chart.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail.
As shown in Figure 1, 2, apparatus of the present invention pass through main electrode matrix and the current compensation electrode matrix that equidistant dislocation is laid,
According to the attenuation rate of field intensity, compensating electrode corresponding with main electrode is powered, and keep compensatory zone two polarity of electrode contrary, lead to
The mode that overcurrent compensates, regulates and controls this region electric field intensity inside high.Described main electrode matrix adopt M × N (M >=2, N >=2) etc.
Lay away from grid, powered by DC source, voltage range is 20V～36V；The polarity switching of main electrode was controlled by the very first time
Device TC1 processed and the second time controller TC2 completes, and comprises the following steps：, during setting first taking 2 × 2 electrode matrix units as a example
Between controller TC1 and the second time controller TC2 the opened/closed time identical, make the first relay KA1 and the 4th relay
KA4 closing time is synchronous, and the second relay KA2 and the 3rd relay KA3 closing time are synchronous, the first relay KA1, the 4th continues
Electrical equipment KA4 and the second relay KA2, the 3rd relay KA3 closing time are asynchronous, and then control No. 1, No. 4 electrodes and No. 2, No. 3
The opposite polarity of electrode.
Described current compensation electrode matrix is laid using (M-1) × (N-1) isometric net, and misplaces with main electrode matrix
Arrangement, compensating supply voltage scope is 20V～36V, compensates electric power output voltage by regulation and control, thus regulating and controlling to compensate electric current big
Little；The polarity switching of current compensation electrode matrix is completed by the 3rd time controller TC3, comprises the following steps：With main electrode
As a example 2 × 2 matrix units of matrix, if No. 5 electrodes are current compensation electrode.To compensate the electric-field strength in No. 1 electrode zone
Degree, then the opened/closed time of setting the 3rd time controller TC3 and very first time controller TC1, the second time controller
TC2 is identical, makes the 5th relay KA5 and the synchronization of the 4th relay KA4 closing time, the 6th relay KA6 and the 3rd relay
KA3 closing time is synchronous, and the 5th relay KA5, the 4th relay KA4 are closed with the 6th relay KA6, the 3rd relay KA3
The conjunction time is asynchronous, and then controls the opposite polarity of No. 5 current compensation electrodes and No. 1 electrode.
During electro reclamation, soil moisture content maintains 25% ± 3%.Under this condition, field strength attenuation rate is field intensity prison
Survey device fixed point monitoring to obtain.When field intensity attenuation rate >=20%, field intensity monitor starts compensating electrode matrix power, by the 3rd
Time controller TC3, makes current compensation electrode matrix connect and compensates power supply, provides current compensation, the electric field of regulation and control designated area
Intensity.
Embodiment 1
The oil-polluted soils that the contaminated soil that the present embodiment is repaired configures for laboratory, the soil adopted is brown earth,
Indoor Natural crosses 2mm sieve after air-drying, and oil picks up from Liaohe Oil Field Shenyang oil recovery factory, is configured to the oil pollution of oil content 40g/kg
Soil.It is configured to natural air drying after oil-polluted soils to place 7 days, after oil and mixing with soil are uniform, with pure water by soil
Earth moisture content is adjusted to 25%, is encased in soil box, the long 24cm of soil box, wide 24cm, high 10cm.And during electro reclamation
Soil moisture content maintains 25% ± 3%.
Arrange five root electrodes in contaminated soil, be respectively designated as 1,2,3,4, No. 5 electrodes, wherein, based on 1,2,3, No. 4
Electrode, No. 5 electrodes are current compensation electrode.Electrode material is graphite electrode, diameter 1cm, high 11cm, wherein 1,2,3, No. 4 electricity
Anode-cathode distance is 24cm, and No. 5 electrodes, in the centerline points of 1,2,3, No. 4 electrodes, arrange electrode referring to Fig. 2.Main electrode matrix is straight
Stream supply voltage is 24V, and polarity switching time is 6h, and compensating electrode direct current supply voltage range is 24V.Repair time is 60d.
Monitored area is divided into four regions according to center, is named as monitoring section 1, monitoring section 2, monitoring section according to main electrode numbering respectively
3, monitoring section 4, referring to Fig. 3.
The purpose that electrode switches opposed polarity, tool are sequentially reached by adjustment time controller parameter control relay adhesive
Body flow process is as shown in figure 4, include：
Step one, setting time controller parameter.Keep very first time controller TC1's and the second time controller TC2
The opened/closed time is identical, makes the first relay KA1 and the 4th relay KA4 closing time synchronous, the second relay KA2 and
3rd relay KA3 closing time is synchronous, the first relay KA1, the 4th relay KA4 and the second relay KA2, the 3rd relay
Device KA3 closing time is asynchronous.
Step 2, under main electrode matrix polarity switching pattern, start control system, as the first relay KA1 and the 4th
Relay KA4 closure, the second relay KA2 and the 3rd relay KA3 be when opening, and No. 1 and No. 4 electrodes are negative pole, No. 2 and No. 3
Electrode is positive pole；Open as the first relay KA1 and the 4th relay KA4, the second relay KA2 and the 3rd relay KA3 closes
During conjunction, No. 1 and No. 4 electrodes are positive pole, No. 2 and No. 3 electrodes are negative pole；
Step 3, when monitoring section electric field intensity attenuation rate >=20%, start compensating electrode pattern, setting the 3rd the time control
Device TC3 processed is identical with the opened/closed time of very first time controller TC1, the second time controller TC2.To monitor 1st area it is
Example, keeps the 5th relay KA5 and the first relay KA1, the 4th relay KA4 closing time synchronous, the 6th relay KA6 and
Synchronous with the second relay KA2, the 3rd relay KA3 closing time, during the 5th relay KA5 and the 6th relay KA6 closure
Between asynchronous, that is, when the 5th relay KA5, the first relay KA1 and the 4th relay KA4 close, the 6th relay KA6, second
When relay KA2 and the 3rd relay KA3 opens, No. 1 and No. 4 electrodes are negative pole, No. 2, No. 3, No. 5 electrodes be positive pole；When
Five relay KA5, the first relay KA1 and the 4th relay KA4 open, the 6th relay KA6, the second relay KA2 and
During three relay KA3 closures, No. 1 and No. 4 electrodes are positive pole, No. 2, No. 3, No. 5 electrodes be negative pole.
By the current compensation between compensating electrode and main electrode, regulate and control local electric field strength during electro reclamation, dimension
Hold the high efficiency of electro reclamation, improve overall remediation efficiency.
Repair result and see attached list 1.
Table 1
| Group | Process | Initial oil content (%) | Remediation efficiency (%) | Process time (my god) |
| Matched group | No | 4% | 3.7% | 60 |
| Experimental group 1 | Electro reclamation | 4% | 42.5% | 60 |
| Experimental group 2 | Current compensation electro reclamation | 4% | 57.9% | 60 |
Embodiment 2
Difference from Example 1 is：
The contaminated soil repaired is pyrene contaminated soil, and pyrene content is 150ppm.The long 10cm of soil chamber, wide 10cm, high 5cm.
Electrode adopts graphite electrode, and electrode diameter is 0.5cm, high 6cm.Main electrode matrix direct current supply voltage is 20V, and compensating electrode is straight
Stream supply voltage is 20V.Polarity switching time is 4h, and repair time is 30d.During electro reclamation, soil moisture content maintains
25% ± 3%.
After the completion of connection, start main electrode Inverse problem pattern, when monitoring section electric field intensity attenuation rate >=20%, start
Compensating electrode pattern, makes No. 5 polarities of electrode and the main electrode polarity of electric field intensity decay monitoring section keep contrary.By compensating electricity
Current compensation between pole and main electrode, has regulated and controled local electric field strength during electro reclamation, maintains the efficient of electro reclamation
Property, improve overall remediation efficiency.
Repair result and see attached list 2.
Table 2
| Group | Process | Initial pyrene content (ppm) | Remediation efficiency (%) | Process time (my god) |
| Matched group | No | 150 | 5.2% | 30 |
| Experimental group 1 | Electro reclamation | 150 | 58.4% | 30 |
| Experimental group 2 | Current compensation electro reclamation | 150 | 82.7% | 30 |
Above content is to further describe it is impossible to assert with reference to specifically preferential case study on implementation is made for the present invention
Being embodied as of the present invention is confined to this.Without departing from the inventive concept of the premise, also can make some simple deduce or
Replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. a kind of Electrokinetic Remediation of Polluted Soils field intensity regulation device based on current compensation, including：
Main electrode matrix, including multiple main electrodes of latticed laying, opening/closing by beating of time controller control relay
Close, and then control each polarity of electrode, keep the main electrode polarity of same diagonal identical, the main electricity in adjacent diagonal line direction
Pole polarity is different；
DC source, by relay and time controller, connects each electrode in main electrode matrix, for main electrode square
Battle array power supply；
It is characterized in that, also include：
Very first time controller TC1, by being connected of the first relay KA1 and the second relay KA2 and DC source, outfan
It is connected with all of main electrode on interval diagonal in main electrode matrix, for controlling the first relay KA1 and the second relay
The opened/closed of KA2, and then coordination electrode polarity；
Second time controller TC2, by being connected of the 3rd relay KA3 and the 4th relay KA4 and DC source, outfan
Connect in main electrode matrix and be in addition spaced diagonally adjacent main electrode, for controlling the 3rd relay KA3 and the 4th relay
The opened/closed of device KA4, and then coordination electrode polarity；
Current compensation electrode matrix, including multiple compensating electrodes, each compensating electrode is laid in main electrode matrix by adjacent four
The central spot of the minimum unit of individual electrode composition；
Compensate power supply, each compensating electrode in current compensation electrode matrix is connected by the 3rd time controller TC3, for right
Current compensation electrode matrix is powered；
3rd time controller TC3, by the 5th relay KA5 and the 6th relay KA6 and being connected of compensating power supply, outfan
It is connected with each electrode of current compensation matrix, for controlling the opened/closed of the 5th relay KA5 and the 6th relay KA6,
And then the polarity of control and compensation electrode；
Field intensity monitor passes through to lay field intensity monitoring probe, monitoring electric field intensity decay in main electrode and compensating electrode centre position
Rate changes, and judges whether that starting the 3rd time controller TC3 carries out current compensation.
2. the Electrokinetic Remediation of Polluted Soils field intensity regulation device based on current compensation as described in claim 1, its feature exists
In：Described main electrode matrix adopts isometric net to lay.
3. the Electrokinetic Remediation of Polluted Soils field intensity regulation device based on current compensation as described in claim 1, its feature exists
In：The voltage range of described DC source is 20V～36V.
4. the Electrokinetic Remediation of Polluted Soils field intensity regulation device based on current compensation as described in claim 1, its feature exists
In：The described voltage range compensating power supply is 20V～36V.
5. the Electrokinetic Remediation of Polluted Soils field intensity regulation device based on current compensation as described in claim 1, its feature exists
In：Described field intensity detector monitors the electric field intensity change of monitoring point, when electric field intensity attenuation rate >=20%, when starting the 3rd
Between controller TC3, powered for current compensation electrode matrix by compensating power supply, realize current compensation, the electricity of enhancing designated area
Field intensity.
6. a kind of Electrokinetic Remediation of Polluted Soils field intensity regulation and control method based on current compensation is it is characterised in that comprise the following steps：
Under main electrode matrix polarity switching pattern, by very first time controller TC1 control relay, make a diagonal side
Main electrode polarity upwards is identical；By the second time controller TC2 control relay, keep another diagonally adjacent
Main electrode polarity is identical；And keep adjacent diagonal line main electrode opposite polarity；
The opened/closed time of setting very first time controller TC1 and the second time controller TC2 is identical, makes the first relay
KA1 and the 4th relay KA4 closing time are synchronous, and the second relay KA2 and the 3rd relay KA3 closing time are synchronous, and first
Relay KA1, the 4th relay KA4 are asynchronous with the second relay KA2, the 3rd relay KA3 closing time, and then make interval right
Main electrode polarity on linea angulata direction is different；
Under compensating electrode pattern, opened/closed time and the very first time controller TC1 of setting the 3rd time controller TC3,
Second time controller TC2 is identical, keeps the 5th relay KA5 asynchronous with the relay closing time of corresponding compensatory zone, the
Six relay KA6 are synchronous with the relay closing time of corresponding compensatory zone, make the polarity phase of compensating electrode and corresponding main electrode
Instead；
When monitoring section electric field intensity attenuation rate >=20%, start compensating electrode pattern, by the 3rd time controller TC3, make
Current compensation electrode matrix is connected and is compensated power supply, keeps the compensating electrode on a diagonal and the main electrode pole on this diagonal
Property identical/different and different from the compensating electrode polarity on another diagonal/identical.
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| CN105728453B (en) * | 2016-03-11 | 2018-05-25 | 中国科学院沈阳应用生态研究所 | A kind of field strength compensation method that inhomogeneous field is built by auxiliary electrode |
| CN105750322B (en) * | 2016-03-11 | 2018-05-18 | 中国科学院沈阳应用生态研究所 | A kind of flow guiding electrode based on electrical potential difference is laid and field strength compensation method |
| CN106180159A (en) * | 2016-07-07 | 2016-12-07 | 北京大学 | A kind of contaminated soil Electroremediation system power real-time acquisition device based on data collecting card |
| CN107844642B (en) * | 2017-10-25 | 2021-03-16 | 中国科学院沈阳应用生态研究所 | Non-uniform electric field construction method based on encrypted electrode iterative layout |
| CN107691419B (en) * | 2017-10-27 | 2024-01-30 | 农业部南京农业机械化研究所 | Remote control self-propelled soil radio frequency processor |
| CN111545562A (en) * | 2020-05-19 | 2020-08-18 | 华东理工大学 | Method for repairing organic-polluted low-permeability soil by homogenizing mass transfer electric field-electric-thermal conduction coupling |
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| JP2006346549A (en) * | 2005-06-15 | 2006-12-28 | Kubota Corp | In-situ purification method of contaminated soil |
| CN101767105A (en) * | 2008-12-30 | 2010-07-07 | 中国科学院沈阳应用生态研究所 | Organic pollution soil repair system and method |
| KR101297089B1 (en) * | 2011-06-08 | 2013-08-19 | 한국전기연구원 | Electrokinetic soil recovery system functioned power supply control |
| CN102357522B (en) * | 2011-07-21 | 2013-04-17 | 辽宁科技大学 | Method for electrokinetic restoration of chromium-contaminated soil by using bipolar electrode |
| CN102513344A (en) * | 2012-01-04 | 2012-06-27 | 大恩(天津)环境技术研发有限公司 | Novel method for remedying heavy-metal contaminated soil with electrodynamics |
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