CN105665433A - Soil contamination in-situ desorption method and device - Google Patents
Soil contamination in-situ desorption method and device Download PDFInfo
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- CN105665433A CN105665433A CN201610108756.7A CN201610108756A CN105665433A CN 105665433 A CN105665433 A CN 105665433A CN 201610108756 A CN201610108756 A CN 201610108756A CN 105665433 A CN105665433 A CN 105665433A
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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
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/062—Reclamation of contaminated soil thermally by using electrode or resistance heating elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a soil contamination in-situ desorption device. The soil contamination in-situ desorption device comprises a group of positive and negative electrodes used for heating contaminated soil, an injection/extraction well, a dosing machine, and soil/underground water purifying equipment, wherein the positive electrode and the negative electrode are separately connected to a positive electrode and a negative electrode of a power supply, and a heating circuit is formed by the positive electrode, the negative electrode and contaminated soil with resistance; the injection/extraction well is arranged between the positive electrode and the negative electrode, and can be used for injecting chemicals and oxygen gas at different stages of a restoration process or extracting contaminants; the dosing machine is connected to the injection/extraction well, and is used for adding the chemicals, nutritive salts and oxygen gas into the injection/extraction well; and the soil/underground water purifying equipment is connected to the injection/extraction well, and is used for purifying the contaminants extracted by the injection/extraction well. According to the soil contamination in-situ desorption device, a thermal desorption technology and a bio-remediation technology are combined for use, so that the activities of degrading organic contaminants of microorganisms further can be increased by injecting the oxygen gas and the nutritive salts into the soil through the injection/extraction well while the soil is effectively heated to promote removal of volatile and semi-volatile organic contaminants.
Description
Technical field
The present invention relates to remediation contaminated soil field, specifically, be related specifically to a kind of soil pollution original position desorption method and device.
Background technology
The soil pollution situation of current China is serious, and having large amount of organic to pollute " palm fibre ground " needs to repair. Existing suitable in the method essentially Soil leaching of organic pollution reparation, gas phase extracting, thermal desorption, biodegradation etc.
Such as, application number be 201510605846.2 patent application document disclose a kind of method administering soil pollution, comprise the steps: Caulis et Folium Oryzae, corn stalk, Semen arachidis hypogaeae bar are put in pulverizer and pulverized, during addition water, EM bacterium solution mix homogeneously are manured into soil, irrigate, adding quick lime adjustment P in soil H-number is 7.2-7.5, stands; Aminoacids complex, compound trace element fertilizer, plant activating enzymes, humic acids are sent in water and stirred, obtains growth of microorganism agent; Growth of microorganism agent is applied in the soil after standing; By uniform to organic binder bond, activity excitant, sodium lignin sulfonate, sodium aluminate, polyvinyl alcohol, it is sprinkled in soil obtained above, loosen the soil, plant Dioscorea zingiberensis, conventional fertilizer application, treat that Dioscorea zingiberensis is ripe, Dioscorea zingiberensis tuber is excavated, plant new Dioscorea zingiberensis again, repeat 2-6 time, it is achieved that the improvement of contaminated soil.
Application number be 201310267950.6 patent application document disclose a kind of contaminated soil original place adopt engineering mode administer method. The method by arranging infiltration/collector pipe network on earth's surface and ground lower leaf, the flood pattern of tie surface and sewage disposal system, successively contaminated soil is carried out layering from top to bottom and cleans, until the soil of all laying pipe networks all cleans and reaches required standard. If less than-5 meters deep soil layers still have pollutant to need to clean, the vertical shaft beating quincuncial arrangement can being adopted to undertake extraction contaminant water, the infiltration/collector pipe network of basecoat undertakes the function pouring into clear water. The degree of depth of vertical shaft optionally sets, until it reaches impermeable stratum. The heavy metal separated and pollutant can be recycled or do harmless treatment.
Above-mentioned remediation contaminated soil ways and means is single, wide usage is low, and limited success.
Soil leaching and gas phase extracting inapplicable when soil permeability difference, and simple thermal desorption can not effectively be removed soil reduced fuel oil and pollute.
Further, since the following soil in top layer is relatively low due to oxygen content, the activity of aerobic microbiological is relatively low, and biodegradation is low to organic contaminants' degradation activity, and this also can affect the effect of unexpected remediation contaminated soil.
Summary of the invention
Present invention aims to deficiency of the prior art, a kind of soil pollution original position desorption method and device are provided, by thermal desorption and bioremediation technology coupling, thus the volatilization effectively removed in soil and half volatile organic contaminant, the activity of Soil Microorganism can also be increased simultaneously, in soil, it is filled with oxygen, nutritive salt, it is possible to increase the activity of microbial degradation long-chain organic pollution, to solve the problems referred to above again through injection/extraction well.
Technical problem solved by the invention can realize by the following technical solutions:
A kind of soil pollution original position desorption method, comprises the steps:
1) inserting positive and negative electrode at the correct position of polluted soil, energising is to increase polluted soil temperature;
2) along with temperature increases, the some organic pollutants comprised in polluted soil is removed by thermal desorption, and the microbial activity simultaneously comprised in polluted soil promotes, and biodegradability improves;
3) in heating process, by the injection effect of injection/extraction well, Soil leaching agent is injected in polluted soil, more multi-pollutant is promoted to depart from from soil particle surface, pollutant are extracted out by the extracting effect again through injection/extraction well, and the pollutant of extraction are processed by soil/ground water cleaning equipment;
4) oxygen and nutritive salt are injected by injections/extraction well, under suitable pressure, it is possible to oxygen, nutrient salt are dissipated to the site of contamination of polluted soil, increase the activity of aerobic microbiological in soil, the lifting degradation capability to organic pollution further.
A kind of soil pollution original position desorption apparatus, it includes
One group for heating the positive and negative electrode of polluted soil, described positive and negative electrode is connected with the positive and negative electrode of a power supply respectively, itself and there is the polluted soil composition heater circuit of resistance;
One injection/extraction well, described injection/extraction well is arranged between described positive and negative electrode;
One power set, described power set are connected with chemicals feeder and soil/ground water cleaning equipment respectively by three-way valve, and it is used for providing Bidirectional power, to realize function of injecting and the extracting function of injection/extraction well;
One chemicals feeder being connected with described injection/extraction well, it for adding medicament in injection/extraction well;
One soil being connected with described injection/extraction well/ground water cleaning equipment, it is for purifying the pollutant that injection/extraction well extracts.
Further, the preventer for stopping saline deposit is installed in the periphery of described positive and negative electrode.
Compared with prior art, beneficial effects of the present invention is as follows:
The present invention, by thermal desorption and bioremediation technology coupling, effectively raises the disposal ability to polluted soil, and is applicable to all kinds of polluted soil, have comparatively wide market prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of soil pollution original position desorption apparatus of the present invention.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with detailed description of the invention, the present invention is expanded on further.
Referring to Fig. 1, a kind of soil pollution original position desorption apparatus of the present invention, it includes
One group for heating the positive and negative electrode of polluted soil, described positive and negative electrode is connected with the positive and negative electrode of a power supply respectively, itself and there is the polluted soil composition heater circuit of resistance;
One injection/extraction well, described injection/extraction well is arranged between described positive and negative electrode;
One power set, described power set are connected with chemicals feeder and soil/ground water cleaning equipment respectively by three-way valve, and it is used for providing Bidirectional power, to realize function of injecting and the extracting function of injection/extraction well; The infusion of medicine that chemicals feeder both can be provided by power set, it is also possible to the pollutant supply soil/ground water cleaning equipment that will extract.
One chemicals feeder being connected with described injection/extraction well, it for adding medicament in injection/extraction well;
One soil being connected with described injection/extraction well/ground water cleaning equipment, it is for purifying the pollutant that injection/extraction well extracts.
Described positive and negative electrode adopts graphite to make, and is provided with wire netting in the periphery of described positive and negative electrode by demountable structure, and described wire netting is for stopping salt deposition on positive and negative electrode. When mineralization is more, it is possible to the metal net mask more renewed.
The spacing of described positive and negative electrode is 2m, and the voltage between positive and negative electrode is 110V, owing to soil self exists resistance, and can heating soil when energising. Above-mentioned functions realizes also by the mode of high electric current, low-voltage, and the present invention includes but not limited to above two mode.
The work process of the present invention is as follows:
1) inserting positive and negative electrode at the correct position of polluted soil, energising is to increase polluted soil temperature;
2) along with temperature increases, the some organic pollutants comprised in polluted soil is removed by thermal desorption,
The microbial activity simultaneously comprised in polluted soil promotes, and biodegradability improves;
3) in heating process, by the injection effect of injection/extraction well, Soil leaching agent is injected in polluted soil, more multi-pollutant is promoted to depart from from soil particle surface, pollutant are extracted out by the extracting effect again through injection/extraction well, and the pollutant of extraction are processed by soil/ground water cleaning equipment;
4) oxygen and nutritive salt are injected by injections/extraction well, under suitable pressure, it is possible to oxygen, nutrient salt are dissipated to the site of contamination of polluted soil, increase the activity of aerobic microbiological in soil, the lifting degradation capability to organic pollution further.
The foregoing describe the ultimate principle of the present invention and principal character and advantages of the present invention. Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention. Claimed scope is defined by appending claims and equivalent thereof.
Claims (3)
1. a soil pollution original position desorption method, it is characterised in that comprise the steps:
1) inserting positive and negative electrode at the correct position of polluted soil, energising is to increase polluted soil temperature;
2) along with temperature increases, the some organic pollutants comprised in polluted soil is removed by thermal desorption, and the microbial activity simultaneously comprised in polluted soil promotes, and biodegradability improves;
3) in heating process, by the injection effect of injection/extraction well, Soil leaching agent is injected in polluted soil, more multi-pollutant is promoted to depart from from soil particle surface, pollutant are extracted out by the extracting effect again through injection/extraction well, and the pollutant of extraction are processed by soil/ground water cleaning equipment;
4) oxygen and nutritive salt are injected by injections/extraction well, under suitable pressure, it is possible to oxygen, nutrient salt are dissipated to the site of contamination of polluted soil, increase the activity of aerobic microbiological in soil, the lifting degradation capability to organic pollution further.
2. the device being used for realizing soil pollution original position desorption method as claimed in claim 1, it is characterised in that it includes
One group for heating the positive and negative electrode of polluted soil, described positive and negative electrode is connected with the positive and negative electrode of a power supply respectively, itself and there is the polluted soil composition heater circuit of resistance;
One injection/extraction well, described injection/extraction well is arranged between described positive and negative electrode;
One power set, described power set are connected with chemicals feeder and soil/ground water cleaning equipment respectively by three-way valve, and it is used for providing Bidirectional power, to realize function of injecting and the extracting function of injection/extraction well;
One chemicals feeder being connected with described injection/extraction well, it for adding medicament in injection/extraction well;
One soil being connected with described injection/extraction well/ground water cleaning equipment, it is for purifying the pollutant that injection/extraction well extracts.
3. soil pollution original position desorption apparatus according to claim 2, it is characterised in that be provided with the preventer for stopping saline deposit in the periphery of described positive and negative electrode.
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| CN201610108756.7A CN105665433A (en) | 2016-02-26 | 2016-02-26 | Soil contamination in-situ desorption method and device |
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| CN201610108756.7A CN105665433A (en) | 2016-02-26 | 2016-02-26 | Soil contamination in-situ desorption method and device |
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| CN106216381A (en) * | 2016-08-05 | 2016-12-14 | 上海漕河泾桃浦科技智慧城经济发展有限公司 | Freezing isolation and in-situ heat desorbing integral system and the processing method of contaminated soil |
| CN107020297A (en) * | 2017-05-27 | 2017-08-08 | 北京高能时代环境技术股份有限公司 | A kind of contaminated soil, underground water reaction in-situ band repair system and restorative procedure |
| CN108114970A (en) * | 2017-12-21 | 2018-06-05 | 永清环保股份有限公司 | A kind of contaminated soil original position thermal desorption repair system and method |
| CN108435778A (en) * | 2018-06-27 | 2018-08-24 | 北京高能时代环境技术股份有限公司 | Electric current heating thermal desorption electrode wells in situ for organic contamination place |
| CN108453129A (en) * | 2017-02-20 | 2018-08-28 | 上海伊尔庚环境工程有限公司 | Contaminated soil steam extracts repair system and method |
| CN108555014A (en) * | 2018-04-11 | 2018-09-21 | 中国科学院沈阳应用生态研究所 | A kind of medium temperature aerobic reactor for electronic bioremediation |
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| CN108911437A (en) * | 2018-09-10 | 2018-11-30 | 江苏澳洋生态园林股份有限公司 | Underground sewage ecological purification and soil stabilizing apparatus |
| CN109047305A (en) * | 2018-07-31 | 2018-12-21 | 南京格洛特环境工程股份有限公司 | Chemical pollution place soil and groundwater in-situ remediation system and restorative procedure |
| CN109530420A (en) * | 2018-12-12 | 2019-03-29 | 华南师范大学 | A kind of soil in-situ repair system and its restorative procedure |
| CN109641247A (en) * | 2016-08-29 | 2019-04-16 | 株式会社竹中工务店 | Underground purification method |
| CN110243080A (en) * | 2018-03-09 | 2019-09-17 | 中国石油天然气集团有限公司 | The solar energy loop circuit heat pipe system of the microbe soil purification of heat pipe variable density |
| CN110278731A (en) * | 2019-08-08 | 2019-09-27 | 谭海龙 | A kind of salt-soda soil electrolysis quick improvement device and method |
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| CN111299312A (en) * | 2020-02-26 | 2020-06-19 | 苏州市环境科学研究所 | In-situ resistance thermal desorption simulation device |
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| CN112547783A (en) * | 2020-12-25 | 2021-03-26 | 苏州精英环保有限公司 | In-situ thermal desorption system and method for composite contaminated soil |
| CN114192558A (en) * | 2021-12-10 | 2022-03-18 | 江苏暨之阳环保科技有限公司 | Petroleum soil pollution remediation process for promoting crude oil degradation |
| CN114260302A (en) * | 2021-12-23 | 2022-04-01 | 河海大学 | Thermal desorption layered remediation method for heavy metal contaminated soil and soil remediation equipment thereof |
| CN114260302B (en) * | 2021-12-23 | 2023-01-31 | 河海大学 | Thermal desorption layered remediation method for heavy metal contaminated soil and soil remediation equipment thereof |
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| CN115069754B (en) * | 2022-05-19 | 2023-07-18 | 北京高能时代环境技术股份有限公司 | Electrode well structure and repair system for in-situ thermal desorption-electrocatalytic oxidation |
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