CN102225424A - Apparatus for eluting and restoring contaminated soil of site with integration of stirring, ultrasounds and microwaves - Google Patents
Apparatus for eluting and restoring contaminated soil of site with integration of stirring, ultrasounds and microwaves Download PDFInfo
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- CN102225424A CN102225424A CN 201110087565 CN201110087565A CN102225424A CN 102225424 A CN102225424 A CN 102225424A CN 201110087565 CN201110087565 CN 201110087565 CN 201110087565 A CN201110087565 A CN 201110087565A CN 102225424 A CN102225424 A CN 102225424A
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Abstract
The invention relates to an apparatus for eluting and restoring contaminated soil of a site with integration of stirring, ultrasounds and microwaves. The apparatus is characterized in that: the apparatus comprises a housing and a support; the housing comprises a stirring shaft, an impeller, an elution pot, an ultrasonic generator and microwave generators; and a driving motor and a feed inlet which are connected with the stirring shaft are arranged on an upper part of the housing, and a discharge hatch and a control valve are arranged on a lower part of the housing. The contaminated soil and an eluant are sent to the elution pot through the feed inlet, and the mechanical stirring shaft and the ultrasonic generator or the mechanical stirring shaft, the ultrasonic generator and the microwave generator are respectively started according to characteristics of the contaminated soil to carry out an intensive elution for 30 to 60 min, so the contaminated soil of the site can be restored. The apparatus has the advantages of simple structure and low cost, allows the processing period to be shortened, the elution efficiency to be improved, and the restriction of factors of pollutant sorts, soli types, aging times and the like to be less through simultaneously starting to utilize stirring, ultrasounds and microwaves, and has an important application value to solve a Chinese problem of treating contaminated soil of the site to be urgently restored and exploited.
Description
One, technical field
The present invention relates to a kind of contaminated soil administers and the plant equipment of repairing, it mainly is the wash-out reparation that realizes contaminated soil by mechanical agitation, ultrasonic and microwave reinforced measure, be specially adapted to the reparation of complicated condition, high concentration, difficult degradation, difficulty volatilization, ageing time length and toxic pollutant (as organic chloro pesticide, heavy metal etc.) contaminated soil (as place, resettlement back soil such as insecticide factory, factories), belong to contaminated soil improvement and recovery technique field in the environmental pollution improvement.
Two, background technology
Along with sustained and rapid development, the city size of China's economy constantly enlarges, the adjustment of economic structure and the process of honouring an agreement of " Stockholm international convention ", occurred large quantities ofly closing resettlement or waiting to close the agricultural chemicals of resettlement and the more serious manufacturing enterprise of environmental pollution such as iron and steel.According to incompletely statistics, the whole nation only organo-chlorine pesticide (DDT, BHC, Niran, mirex etc.) contaminated site just have hundreds of.These places all are faced with land used function conversion and secondary development.Before the land used displacement, these place contaminated soils will become " Chemical Time Bomb " as not repairing, serious threat health and Environmental security, even cause contamination accident.In Beijing, ground such as Guangzhou, Shijiazhuang, Changzhou, many former industrial lands are used to build residential building without reparation, have taken place because of contaminated soil the resident to be produced the environment event of serious harm, cause the great attention of country.Therefore, the place soil pollution after factory's resettlement has become the current soil environment problem that presses for solution, and the research and development of carrying out place contaminated soil recovery technique equipment are very urgent.
At present, researched and developed a series of recovery technique at the reparation of contaminated soil both at home and abroad, can be divided into physics reparation, chemistry reparation and biological restoration three classes by know-why.The physics recovery technique has soil moved in to improve the original, hot repair is multiple, steam gas is carried, electrodynamics, burning and immobilization etc.; Chemistry reparation has chemistry redox, chemical removal etc.; Biological restoration has biological ventilation, bioreactor, phytoremediation etc.Multiple physics, chemistry, bioremediation technologies such as immobilization, thermal desorption, gas are carried, heterogeneous extraction, chemistry reparation, biological restoration be successful Application in the recovery project of actual contaminated site.The place contaminated soil has characteristics such as pollutant levels height, strong toxicity, difficult volatilization and difficult degradation.Adopt process for fixation to handle and not only wasted soil resource, but also taken the storage capacity of landfill yard, shorten the service life of landfill yard; Thermal desorption is gentle proposes the reparation that is only applicable to vapour pressure height, volatile contaminants soil; The influence of factors such as contaminated species of heterogeneous extraction and soil types; Chemical catalytic oxidation can destroy the structure of soil owing to will add oxidant, may produce some simultaneously and poison bigger intermediate product, thereby cost and risk is higher; The photocatalysis reparation only is applicable to the pollutant that photodissociation can take place, and is difficult to throw soil with the time, also has limitation; Burn and only be applicable to organic pollution, incinerator is had relatively high expectations, cost is also high; Although the bioanalysis processing cost is relatively low, also safer, the processing time is long, and biology is difficult to existence in the contaminated soil of the place of high concentration simultaneously.Wash-out because have fast, safety and low cost and other advantages, can satisfy factory resettlement place and repair and need requirement fast and efficiently, so this method is a kind of suitable place contaminated soil restorative procedure.
The domestic still incompetent at present contaminated soil wash-out prosthetic appliance that is used for engineering practice only have laboratory test to use, rely on the natural drip washing earth pillar of gravity effect, and elute effect is poor.External contaminated soil wash-out prosthetic appliance has fluid bed and supercritical fluid drip washing equipment.Fluid bed drip washing equipment is relatively good to contaminated soil repairing effect organic and that clay content is low, ageing time is short, and place contaminated soil long for ageing time, complicated condition is then unsatisfactory.The manufacturing of supercritical fluid drip washing equipment requires high, with high costs, and engineering practice is difficult to bear.
Three, summary of the invention
Purpose of the present invention be exactly at complicated condition, high concentration, difficult degradation, difficult volatilization, ageing time is long and the reparation difficult point of toxic pollutant contaminated site soil, overcoming the deficiencies in the prior art provides a kind of place contaminated soil wash-out prosthetic appliance that integrates stirring, ultrasonic and microwave.
In order to solve the problems of the technologies described above, the present invention promotes that by mechanical agitation, ultrasonic dispersion and cavitation and microwave reinforced measure are combined pollutant in soil shifts to eluent, thereby improves the effect that the contaminated soil wash-out is repaired.
Basic design of the present invention is: equipment comprises housing and support two parts, and charging aperture and motor are arranged at housing top, and discharging opening and control valve are arranged at the bottom; Device core---enclosure interior is equipped with the wash-out jar, and wash-out jar inside is equipped with shaft, dull and stereotyped impeller; The wash-out pot bottom is equipped with ultrasonic generating means; The wash-out jar also is equipped with microwave generator outward in the housing, so far constitutes the place contaminated soil wash-out prosthetic appliance that integrates stirring, ultrasonic and microwave.
Compare with existing wash-out equipment, advantage of the present invention and beneficial effect are:
(1) strengthen by mechanical agitation, ultrasonic and microwave measure, the influence of factors such as the contaminated hardly thing classification of the present invention, soil types, ageing time all can obtain desirable repairing effect for the wash-out of various contaminated soils.
(2) main member of the present invention is wash-out jar, motor, shaft, impeller, Vltrasonic device and microwave device, and therefore relatively simple for structure, cost is relatively low.
(3) because will stir, ultrasonic and microwave is integrated, and can open simultaneously, so under the same conditions, the present invention can obviously shorten elution time.
Four, description of drawings
Accompanying drawing is a place of the present invention contaminated soil wash-out prosthetic appliance structural representation
1. supports among the figure, 2. housing, 3. microwave generator, 4. wash-out jar, 5. motor, 6. charging aperture, 7. shaft, 8. impeller, 9. discharging opening and valve, 10. ultrasonic generator.
Five, the specific embodiment
With reference to the accompanying drawings, describe the present invention below in conjunction with embodiment.
Provide in the present embodiment to integrate improvement and the reparation that stirring, place contaminated soil wash-out prosthetic appliance ultrasonic and microwave are used for the place contaminated soil, its structure as shown in drawings.
This integrates stirring, the housing that place contaminated soil wash-out prosthetic appliance ultrasonic and microwave is made up of shaft (7), impeller (8), ultrasonic generator (10), microwave generator (3) and wash-out jar (4), the stirring drive motors (5) on housing top and the discharging opening (9) of charging aperture (6) and lower housing portion and constitutes.Whole housing places on the support (1).
Collection stirs, ultrasonic as follows in the method for operation of the place of one contaminated soil wash-out prosthetic appliance: that contaminated soil is sent into wash-out jar (4) from charging aperture (6) with microwave, the eluent that then adds certain volume by specific solid-to-liquid ratio, the content of organic matter is low, the short soil of grittiness and ageing time only starts mechanical agitation (5,7,8) and ultrasonic generator (10), for organic and clay content height, the contaminated soil that ageing time is long need start mechanical agitation (5 simultaneously, 7,8), ultrasonic (10) and microwave generator (3), wash-out 30～60min, discharge through discharging opening (9) then, carry out subsequent treatment such as Separation of Solid and Liquid.Soil after the dehydration is clean soil.Eluent after stripping or extract and separate, eluant, eluent reuse capable of circulation, and utilizing again behind the curable landfill of pollutant, burning or the purifying.
Embodiment 1: the wash-out reparation of BHC and DDT place contaminated soil
(1) sampling
Contaminated soil (soil sample 1) picks up from leaves over top layer, place 0～60cm after the resettlement of jiangsu wuxi BHC and DDT manufacturing enterprise, with rejectings such as the rhizome in the soil, leaf and stones.The basic physical and chemical such as the table 1 of soil.After measured, major pollutants are BHC (HCH) and DDT (DDT) in the soil, and ∑ HCH and ∑ DDT are respectively 102 and 6343mg/kg.
Table 1 is repaired the basic physical and chemical of soil sample 1
(2) operating process
Eluant, eluent is an ethyl acetate, and above-mentioned soil sample and eluant, eluent are placed the wash-out jar by solid-to-liquid ratio 1: 3 (W (g)/V (mL)), starts mechanical agitation and ultrasonic generator, handles 30min.
(3) wash-out result
The present invention sees Table 2 for the wash-out repairing effect of soil sample 1.
BHC and DDT wash-out clearance (%) in table 2 soil sample 1
As shown in Table 2, BHC and DDT wash-out clearance is all above 86%.
Embodiment 2: the wash-out reparation of mirex place contaminated soil
(1) sampling
Contaminated soil (soil sample 2) picks up from the Liyang one organo-chlorine pesticide factory resettlement ruins 20-60cm of lower floor (because top layer 0-20cm is cement plot or mixed earth, therefore not gathering).The basic physicochemical character of soil sees Table 3, and wherein the concentration of mirex is 8.41mg/kg.
Table 3 is repaired the basic physical and chemical of soil sample 2
(2) operating process
Eluant, eluent is respectively ethyl acetate, acetone and carrene, and all the other are with embodiment 1.
(3) wash-out result
The present invention is as shown in table 4 to the wash-out removal effect of mirex place contaminated soil (soil sample 2).
Mirex wash-out clearance (%) in table 4 soil sample 2
Table 4 presentation of results utilization the present invention, 3 kinds of eluant, eluents to a wash-out clearance of mirex all greater than 86%.
Claims (4)
1. a place contaminated soil wash-out prosthetic appliance that integrates stirring, ultrasonic and microwave comprises housing and support, and it is characterized in that: housing is made up of shaft, impeller, wash-out jar, ultrasonic generator and microwave generator; Housing top is drive motors and the charging aperture that links to each other with shaft, and lower housing portion is discharging opening and by-pass valve control.
2. place according to claim 1 contaminated soil wash-out prosthetic appliance is characterized in that, is equipped with mechanical agitation axle and 2 impellers in the wash-out jar, by the case top motor-driven.
3. place according to claim 1 contaminated soil wash-out prosthetic appliance is characterized in that the wash-out pot bottom is equipped with ultrasonic generator.
4. place according to claim 1 contaminated soil wash-out prosthetic appliance is characterized in that, the wash-out jar be peripherally equipped with microwave generator.
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| CN 201110087565 CN102225424A (en) | 2011-04-08 | 2011-04-08 | Apparatus for eluting and restoring contaminated soil of site with integration of stirring, ultrasounds and microwaves |
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| CN 201110087565 CN102225424A (en) | 2011-04-08 | 2011-04-08 | Apparatus for eluting and restoring contaminated soil of site with integration of stirring, ultrasounds and microwaves |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182394A (en) * | 2013-03-21 | 2013-07-03 | 中国科学院南京土壤研究所 | Multielement ex-situ remediation equipment and method used for organo-chlorine pesticide contaminated soil |
| CN103286122A (en) * | 2013-04-12 | 2013-09-11 | 浙江桃花源环保科技有限公司 | Leaching restoration engineered apparatus for persistent organic pollutant-contaminated site |
| CN103691733A (en) * | 2013-12-11 | 2014-04-02 | 浙江大学 | Extracting, leaching and repairing integrated device and method for polluted soil |
| CN103722006A (en) * | 2014-01-09 | 2014-04-16 | 环境保护部南京环境科学研究所 | Organo-chlorine pesticide contaminated soil synergism eluting system |
| CN103962373A (en) * | 2014-05-29 | 2014-08-06 | 武汉大学 | Organic contaminated soil remediation device based on leacheate recycling |
| CN104438309A (en) * | 2013-09-22 | 2015-03-25 | 重庆文理学院 | Inner circulation fluidized bed soil heavy metal elution apparatus |
| CN104858227A (en) * | 2015-06-02 | 2015-08-26 | 江苏省环境科学研究院 | Ultrasonically assisted leaching device and method for restoring soil polluted by heavy metal |
| CN105945046A (en) * | 2016-06-27 | 2016-09-21 | 华南理工大学 | Movable ultrasonic stirring cleaning tank and method for repairing heavy metal contaminated soil |
| CN106623392A (en) * | 2016-05-19 | 2017-05-10 | 中钢集团天澄环保科技股份有限公司 | Field soil repair device using electromagnetic waves and nanometer repair agent |
| CN107838188A (en) * | 2017-11-24 | 2018-03-27 | 云南民族大学 | One kind implantation type micro-wave Soil leaching column production method |
| CN107931318A (en) * | 2017-11-20 | 2018-04-20 | 浙江省农业科学院 | A kind of bioreactor for soil remediation |
| CN108015106A (en) * | 2018-01-31 | 2018-05-11 | 江苏省环境科学研究院 | Heavy-metal contaminated soil elution is repaired and leacheate regeneration integrated apparatus and its method |
| CN108746195A (en) * | 2018-09-12 | 2018-11-06 | 东北林业大学 | Elution is with oxidative degradation in the prosthetic device and method of the organic polluted soil of one |
| CN110170142A (en) * | 2019-05-06 | 2019-08-27 | 生态环境部华南环境科学研究所 | A method of for organochlorine in agricultural land soil of degrading |
| CN114682617A (en) * | 2022-03-31 | 2022-07-01 | 四川农业大学 | Oil soil remediation device and method by coupling double-frequency ultrasonic waves with sodium persulfate |
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| CN101972773A (en) * | 2010-11-23 | 2011-02-16 | 南京农业大学 | System for restoring organic contaminated soil by forced ventilation and spiral stirring thermal desorption |
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| CN1850371A (en) * | 2006-06-02 | 2006-10-25 | 清华大学 | Micro-wave heating desorption/alkyl catalytic decomposition treatment method for polychlorinated biphenyl in soil |
| CN101461990A (en) * | 2009-01-15 | 2009-06-24 | 北京师范大学 | Method for analyzing and processing persistent organic pollutants by microwave assisted base catalysis |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182394A (en) * | 2013-03-21 | 2013-07-03 | 中国科学院南京土壤研究所 | Multielement ex-situ remediation equipment and method used for organo-chlorine pesticide contaminated soil |
| CN103286122A (en) * | 2013-04-12 | 2013-09-11 | 浙江桃花源环保科技有限公司 | Leaching restoration engineered apparatus for persistent organic pollutant-contaminated site |
| CN104438309A (en) * | 2013-09-22 | 2015-03-25 | 重庆文理学院 | Inner circulation fluidized bed soil heavy metal elution apparatus |
| CN104438309B (en) * | 2013-09-22 | 2017-02-22 | 重庆文理学院 | Inner circulation fluidized bed soil heavy metal elution apparatus |
| CN103691733A (en) * | 2013-12-11 | 2014-04-02 | 浙江大学 | Extracting, leaching and repairing integrated device and method for polluted soil |
| CN103691733B (en) * | 2013-12-11 | 2015-07-15 | 浙江大学 | Extracting, leaching and repairing integrated device and method for polluted soil |
| CN103722006B (en) * | 2014-01-09 | 2016-03-02 | 环境保护部南京环境科学研究所 | A kind of organochlorine pesticide pollution soil synergy elution system |
| CN103722006A (en) * | 2014-01-09 | 2014-04-16 | 环境保护部南京环境科学研究所 | Organo-chlorine pesticide contaminated soil synergism eluting system |
| CN103962373A (en) * | 2014-05-29 | 2014-08-06 | 武汉大学 | Organic contaminated soil remediation device based on leacheate recycling |
| CN104858227A (en) * | 2015-06-02 | 2015-08-26 | 江苏省环境科学研究院 | Ultrasonically assisted leaching device and method for restoring soil polluted by heavy metal |
| CN106623392A (en) * | 2016-05-19 | 2017-05-10 | 中钢集团天澄环保科技股份有限公司 | Field soil repair device using electromagnetic waves and nanometer repair agent |
| CN105945046A (en) * | 2016-06-27 | 2016-09-21 | 华南理工大学 | Movable ultrasonic stirring cleaning tank and method for repairing heavy metal contaminated soil |
| CN107931318A (en) * | 2017-11-20 | 2018-04-20 | 浙江省农业科学院 | A kind of bioreactor for soil remediation |
| CN107838188A (en) * | 2017-11-24 | 2018-03-27 | 云南民族大学 | One kind implantation type micro-wave Soil leaching column production method |
| CN108015106A (en) * | 2018-01-31 | 2018-05-11 | 江苏省环境科学研究院 | Heavy-metal contaminated soil elution is repaired and leacheate regeneration integrated apparatus and its method |
| CN108015106B (en) * | 2018-01-31 | 2023-08-08 | 江苏省环境科学研究院 | Heavy metal contaminated soil leaching restoration and leaching solution regeneration integrated device and method |
| CN108746195A (en) * | 2018-09-12 | 2018-11-06 | 东北林业大学 | Elution is with oxidative degradation in the prosthetic device and method of the organic polluted soil of one |
| CN110170142A (en) * | 2019-05-06 | 2019-08-27 | 生态环境部华南环境科学研究所 | A method of for organochlorine in agricultural land soil of degrading |
| CN114682617A (en) * | 2022-03-31 | 2022-07-01 | 四川农业大学 | Oil soil remediation device and method by coupling double-frequency ultrasonic waves with sodium persulfate |
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Application publication date: 20111026 |