CN103302088A - Method for treating soil pollution in a hierarchically cyclic cleaning manner - Google Patents
Method for treating soil pollution in a hierarchically cyclic cleaning manner Download PDFInfo
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Abstract
The invention discloses a method for treating the soil pollution in a hierarchically cyclic cleaning manner. According to the method, water seepage/water collection pipe networks are hierarchically arranged on the earth surface and under the earth and work together with a water injection system and a sewage treatment system, which are arranged on the ground, to clean polluted soil hierarchically and sequentially from top to bottom until all of the soil with the pipe networks are completely cleaned to reach the ruled standard. If the deep soil layer 5 meters under the ground still has pollutants required to be cleaned away, a quincunx-shaped silo can be used for extracting the polluted water, and the lowermost layer of water seepage/water collection pipe network is used for filling clean water. The depth of the silo is set according to a demand that the silo reaches a non-permeable layer. Separated heavy metals and pollutants can be recycled and treated into harmless resources. According to the method, the shortcomings of the conventional treatment method are fundamentally overcome; furthermore, equipment is small in investment and high in cleaning efficiency and can thoroughly clean the pollutants; and the method is extremely good in popularization and application prospect.
Description
Technical field
The invention belongs to the recovery technique in environmental pollution improvement and resist technology field, particularly polluted soil, is that a kind of layered circulation cleaning, multi-stage separation treatment utilized administered the engineering method of soil pollution.
Background technology
Because urban sprawl, some originally were distributed in the change such as insecticide factory, chemical fertilizer factory, chemical plant in urban periphal defence suburb and did the downtown area, when changing land use, find that soil can not as human lives, inhabitation and movable place, must be administered and repair and could utilize by heavy metal and organic matter severe contamination.Some farmland is owing to being subject to for a long time chemical enterprise or the pollution of mining smelting enterprise's effluent sewerage and waste gas in addition, and the crops that the growth harmful substance exceeds standard also must just can be cultivated in improvement.Contain heavy metal and the poisonous and harmful substances such as chromium, lead, mercury, cadmium, arsenic in these soil, these harmful substances mostly are dissolved in water, and the times of passing through long-term even decades permeate the ground.
Administering soil pollution is a world-class difficult problem, relates to a plurality of fields such as physics, chemistry, microorganism, biological restoration, and the real technology of utilizing on a large scale is less at present, and invests huge, consuming time longer.
Mostly adopted the emergency burial sealing to process to the processing of contaminated soil in the past, and perhaps removed to the strange land and bury the way that sealing is processed, and not only can not fundamentally solve the soil pollution problem, and invest length large, consuming time, and also polluted and shift or other hidden danger.
Summary of the invention
The present invention be directed to the problem that existing engineering exists, the layered circulation that provides a kind of once input long-term stability to move cleans, the method for multi-stage separation pollutant control soil pollution.
A kind of layered circulation that utilizes of the present invention cleans the method for administering soil pollution, comprises
Early-stage preparations:
At surface layer the earth's surface pipe network is set, undergroundly buries the multi-layer underground pipe network underground along the depth direction, wherein, the earth's surface pipe network comprises the pipe network that irrigation pipe, shower or infiltration/collector pipe rearrange; Every layer of many infiltration/collector pipe by tube pitch 8-15 rice of underground pipe network are arranged in parallel and form, layer and interlamellar spacing 0.5-1.5 rice, every layer of manifold trunk access ground that underground pipe network arranges by depth; Infiltration/collector pipe adopts the punching bellows of diameter 60-110mm, the infiltration of under ground portion/collector pipe outsourcing filter course;
Flood pattern and sewage disposal system are set on the ground, wherein, flood pattern comprises that water injecting pump is connected with collecting-tank, and sewage disposal system comprises suction pump and sewage-treatment plant, and the sewage-treatment plant end links to each other with the collecting-tank of flood pattern with control valve by pipeline;
Treatment step:
At first, utilize the surface layer pipe network to be connected with flood pattern as cleaning pipe network, contaminated soil is watered, utilize the ground floor underground pipe network to be connected with sewage disposal system as collecting pipe network, contaminated soil between surface layer and the ground floor underground pipe network is cleaned, sewage after the cleaning is introduced sewage-treatment plant by manifold trunk and suction pump and is carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation;
Step 2, the ground floor underground pipe network is connected with flood pattern as cleaning pipe network, second layer underground pipe network is connected with sewage disposal system as collecting pipe network, contaminated soil between ground floor underground pipe network and the second layer underground pipe network is cleaned, sewage after the cleaning is introduced sewage-treatment plant by manifold trunk and suction pump and is carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation;
According to the mode of step 2, successively following stratum is cleaned and processed, until handled contaminated soil is up to standard.
Such scheme also comprises: at the peripheral embedding division board of processed contaminated soil or barrier film, division board comprises a kind of of precast concrete or plastic plate, metallic plate.The method of embedding division board is the several high-pressure water pipe of longitudinal arrangement on division board, and near the water under high pressure pipe end connection high pressure water nozzle of division board bottom, high-pressure water pipe is connected with high-pressure hydraulic pump, and division board cooperates high-pressure water jet to be lowered to the stratum by lifting mode.
Such scheme further comprises: for the contaminated soil degree of depth greater than in 5 meters situations, during early-stage preparations, as vertical shaft, vertical shaft is connected with sewage-treatment plant with the ground suction pump by manifold trunk at the uniform sand screen of burying underground of the following depth direction of undermost underground pipe network; In the subsequent processing steps, after handling the orlop contaminated soil, utilize the orlop underground pipe network to be connected with flood pattern as cleaning pipe network, the vertical shaft pipe network is connected with sewage disposal system as collecting pipe network, contaminated soil to part below the orlop underground pipe network cleans, sewage after the cleaning is by vertical shaft, manifold trunk and suction pump are introduced sewage-treatment plant and are carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation.
The punch density of described infiltration is 50-75 cm
2/ m, outsourcing filter course comprise nonwoven or palma, screen pack; Described sewage-treatment plant comprises molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus.
Described sewage-treatment plant comprises molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus fiting chemical, biological treatment agent and device.
Method of the present invention has following remarkable result;
At first, special is the characteristics that permeate the ground with the water source for pollutant, by special earth's surface, underground pipe network design, tie surface flood pattern and sewage disposal system, to contaminated soil on the spot layering carry out purified treatment, the pollutant in the soil is cleared up fast, and the special collection of paying attention to waste water reuse and pollutant in the scale removal process, save the water source, avoided the secondary pollution of pollutant.
Its two, for seriously polluted zone, underground quarantine measures have been proposed, contaminated land and peripheral soil are separated, prevent from that sewage from exosmosing to cause secondary pollution.Provide simultaneously the special construction method of precast concrete, improved efficiency of construction.
Its three, cooperate the vertical shaft mode to clean for deep layer contaminant water (soil-5 meter below), vertical shaft can reach more than-10 meters deeply, until underground impermeable stratum is realized the cleaning target under the full formation condition substantially.
The present invention has fundamentally solved the drawback that existing improvement method exists in a word, and equipment investment is little, cleaning efficiency is high, the cleaning of pollutant is more thorough, has possessed very high popularizing application prospect.
The specific embodiment
Embodiment 1
Preparation before the construction:
Flood pattern and sewage disposal system are set on the ground, wherein, flood pattern comprises that water injecting pump is connected with collecting-tank, and sewage disposal system comprises suction pump and sewage-treatment plant, and the sewage-treatment plant end links to each other with the collecting-tank of flood pattern with control valve by pipeline.
At surface layer the earth's surface pipe network is set, undergroundly buries the multi-layer underground pipe network underground along the depth direction, wherein, the mode that the earth's surface pipe network adopts irrigation pipe, shower or infiltration/collector pipe to rearrange according to required processing area size; Every layer of underground pipe network is arranged in parallel by many infiltration/collector pipes and forms, and selects the pipe level interval in 8-15 rice scope according to soil contamination grade, and the manifold trunk access that layer and interlamellar spacing 0.5-1.5 rice, every layer of underground pipe network arrange by depth on the ground; Infiltration/collector pipe adopts the punching bellows of diameter 60-110mm, the infiltration of under ground portion/collector pipe outsourcing filter course.
Treatment step:
At first, utilize the surface layer pipe network to be connected with flood pattern as cleaning pipe network, contaminated soil is watered, utilize the ground floor underground pipe network to be connected with sewage disposal system as collecting pipe network, contaminated soil between surface layer and the ground floor underground pipe network is cleaned, sewage after the cleaning is introduced sewage-treatment plant by manifold trunk and suction pump and is carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation;
Step 2, the ground floor underground pipe network is connected with flood pattern as cleaning pipe network, the earth's surface pipe network can be withdrawn or keep to this process, namely only use the ground floor underground pipe network common as cleaning pipe network as cleaning pipe network or earth's surface pipe network and ground floor underground pipe network, second layer underground pipe network is connected with sewage disposal system as collecting pipe network, contaminated soil between ground floor underground pipe network and the second layer underground pipe network is cleaned, sewage after the cleaning is introduced sewage-treatment plant by manifold trunk and suction pump and is carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation;
According to the mode of step 2, successively following stratum is cleaned and processed, until handled contaminated soil is up to standard.
Embodiment 2
For by the serious situation of soil pollution, in the cleaning process to the again pollution of Soil Surrounding, also comprise on the basis of above-described embodiment 1: at the peripheral embedding division board of processed contaminated soil or barrier film, division board comprises a kind of of precast concrete or plastic plate, metallic plate.The method of embedding division board is the several high-pressure water pipe of longitudinal arrangement on division board, and near the water under high pressure pipe end connection high pressure water nozzle of division board bottom, high-pressure water pipe is connected with high-pressure hydraulic pump, and division board cooperates high-pressure water jet to be lowered to the stratum by lifting mode.Embedding barrier film needs ditching embedding.Buried depth determines according to the soil pollution degree of depth.
Embodiment 3
On the basis of embodiment 1 and embodiment 2, for the contaminated soil degree of depth greater than in 5 meters situations, during early-stage preparations, as vertical shaft, vertical shaft is connected with sewage-treatment plant with the ground suction pump by manifold trunk at the uniform sand screen of burying underground of the following depth direction of undermost underground pipe network; In the subsequent processing steps, after handling the orlop contaminated soil, utilize the orlop underground pipe network to be connected with flood pattern as cleaning pipe network, the vertical shaft pipe network is connected with sewage disposal system as collecting pipe network, contaminated soil to part below the orlop underground pipe network cleans, sewage after the cleaning is by vertical shaft, manifold trunk and suction pump are introduced sewage-treatment plant and are carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation.
In above-described embodiment, the punch density of described infiltration is 50-75 cm
2/ m, outsourcing filter course comprise nonwoven or palma, screen pack; According to the pollutant component of contaminated soil, as: for containing the heavy metal mining area, described sewage-treatment plant adopts existing molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus; For organic matter (greasy dirt, chemical contamination) Polluted area, described sewage-treatment plant comprises that existing molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus fiting chemical, biological treatment agent and device process.
The laying of underground infiltration/collector pipe network adopts special-purpose ditching pipeline burying machine to carry out, and vertical shaft adopts mechanical well-digging mode to bury underground.In carrying out cleaning process, note layering being connected of infiltration/collector pipe and water injecting pump alternately, act on to realize its infiltration (to underground flooding) and catchment (collection underground water) when the different layerings cleaning.
Lay underground pipe network mainly for cleaning contaminated soil under the 0--5 meter.For the soakaway trench of tiling take out less than deep layer contaminant water (soil-5 meter below) can adopt the vertical shaft mode to clean, vertical shaft can reach more than-10 meters deeply.The sand filtration pipe of vertical shaft tubing string is that the degree of depth-5 under the ripple infiltration pipe network meter begins to lay (part can not spread sand screen more than 5 meters) from the soil layer that intend to clean, and is used for absorbing the sewage that infiltrates the vertical shaft periphery.After the soil layer of tiling pipe network control is finished cleaning, imbed the most further underground pipe network and transfer to underground injection clear water, open the vertical shaft water pump and carry out draining.If require the soil of cleaning darker, can also add deep shaft, until underground impermeable stratum.
Clean the supporting pollutant in engineering ground and be processed into covering device, comprise electric power system, the clear water supply system, the sewage extraction system, separated from contaminants is processed and detection system, the compositions such as construction safeguards system.These systems can reasonably arrange in pairs or groups in the prior art equipment according to prompting of the present invention.
Claims (6)
1. one kind is utilized layered circulation to clean the method for administering soil pollution, it is characterized in that comprising
Early-stage preparations:
At surface layer the earth's surface pipe network is set, undergroundly buries the multi-layer underground pipe network underground along the depth direction, wherein, the earth's surface pipe network comprises the pipe network that irrigation pipe, shower or infiltration/collector pipe rearrange; Every layer of many infiltration/collector pipe by tube pitch 8-15 rice of underground pipe network are arranged in parallel and form, layer and interlamellar spacing 0.5-1.5 rice, every layer of manifold trunk access ground that underground pipe network arranges by depth; Infiltration/collector pipe adopts the punching bellows of diameter 60-110mm, the infiltration of under ground portion/collector pipe outsourcing filter course;
Flood pattern and sewage disposal system are set on the ground, wherein, flood pattern comprises that water injecting pump is connected with collecting-tank, and sewage disposal system comprises suction pump and sewage-treatment plant, and the sewage-treatment plant end links to each other with the collecting-tank of flood pattern with control valve by pipeline;
Treatment step:
At first, utilize the surface layer pipe network to be connected with flood pattern as cleaning pipe network, contaminated soil is watered, utilize the ground floor underground pipe network to be connected with sewage disposal system as collecting pipe network, contaminated soil between surface layer and the ground floor underground pipe network is cleaned, sewage after the cleaning is introduced sewage-treatment plant by manifold trunk and suction pump and is carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation;
Step 2, the ground floor underground pipe network is connected with flood pattern as cleaning pipe network, second layer underground pipe network is connected with sewage disposal system as collecting pipe network, contaminated soil between ground floor underground pipe network and the second layer underground pipe network is cleaned, sewage after the cleaning is introduced sewage-treatment plant by manifold trunk and suction pump and is carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation;
According to the mode of step 2, successively following stratum is cleaned and processed, until handled contaminated soil is up to standard.
2. the method for utilizing layered circulation clean to administer soil pollution according to claim 1 is characterized in that: at the peripheral embedding division board of processed contaminated soil or barrier film, division board comprises a kind of of precast concrete or plastic plate, metallic plate.
3. the layered circulation that utilizes according to claim 2 cleans the method for administering soil pollution, it is characterized in that: the method for embedding division board is the several high-pressure water pipe of longitudinal arrangement on division board, water under high pressure pipe end near the division board bottom connects the high pressure water nozzle, high-pressure water pipe is connected with high-pressure hydraulic pump, and division board cooperates high-pressure water jet to be lowered to the stratum by lifting mode.
4. according to claim 1 and 2, the 3 described layered circulations that utilize clean the method for administering soil pollution, it is characterized in that: for the contaminated soil degree of depth greater than in 5 meters situations, during early-stage preparations, as vertical shaft, vertical shaft is connected with sewage-treatment plant with the ground suction pump by manifold trunk at the uniform sand screen of burying underground of the following depth direction of undermost underground pipe network; In the subsequent processing steps, after handling the orlop contaminated soil, utilize the orlop underground pipe network to be connected with flood pattern as cleaning pipe network, the vertical shaft pipe network is connected with sewage disposal system as collecting pipe network, contaminated soil to part below the orlop underground pipe network cleans, sewage after the cleaning is by vertical shaft, manifold trunk and suction pump are introduced sewage-treatment plant and are carried out purified treatment, water up to standard is introduced the collecting-tank of flood pattern after the purified treatment, carry out the secondary utilization, the change of water quality of monitoring groundwater abstraction in the time of circulation flushing, until water quality pollutant is up to standard, collect through the pollutant of sewage-treatment plant purification separation.
5. according to claim 1 and 2, the 3 described methods of utilizing layered circulations clean to administer soil pollution, it is characterized in that: the punch density of described soakaway trench is 50-75cm
2/ m, outsourcing filter course comprise nonwoven or palma, screen pack; Described sewage-treatment plant comprises molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus.
6. the layered circulation that utilizes according to claim 4 cleans the method for administering soil pollution, and it is characterized in that: the punch density of described soakaway trench is 50-75 cm
2/ m, outsourcing filter course comprise nonwoven or palma, screen pack; Described sewage-treatment plant comprises molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus fiting chemical, biological treatment agent and device.
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| CN 201310267950 CN103302088A (en) | 2013-07-01 | 2013-07-01 | Method for treating soil pollution in a hierarchically cyclic cleaning manner |
| CN201410242179.1A CN104043644B (en) | 2013-07-01 | 2014-06-04 | A kind of layered circulation that utilizes cleans the method for administering soil pollution |
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| CN 201310267950 CN103302088A (en) | 2013-07-01 | 2013-07-01 | Method for treating soil pollution in a hierarchically cyclic cleaning manner |
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Cited By (5)
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| CN103736722A (en) * | 2014-01-13 | 2014-04-23 | 韩清洁 | In-situ polluted soil leaching system and method |
| CN106211839A (en) * | 2016-07-15 | 2016-12-14 | 佟保根 | A kind of water discharge method of alkaline land soil |
| CN107986555A (en) * | 2017-11-14 | 2018-05-04 | 中电建水环境治理技术有限公司 | Ground water circulation restorative procedure and system based on function pipe network |
| CN108393342A (en) * | 2018-01-30 | 2018-08-14 | 上海岩土工程勘察设计研究院有限公司 | Sub-region and hierarchical in-situ remediation method suitable for the stirring of Polluted Soil shallow-layer |
| TWI673096B (en) * | 2014-06-03 | 2019-10-01 | 日商同和永續環境股份有限公司 | Method for detoxifying polluted soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1382535A (en) * | 2001-04-20 | 2002-12-04 | 中国科学院沈阳应用生态研究所 | Method and equipment for washing soil polluted by water-soluble or exchangeable heavy metals |
| JP2007021280A (en) * | 2005-07-12 | 2007-02-01 | Mirai Kensetsu Kogyo Kk | Cleaning apparatus and cleaning method for soil |
| CN101879519B (en) * | 2010-01-18 | 2011-08-31 | 王鹤立 | Ultrasonic in situ extraction process for remediating heavy metal-polluted soil |
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2013
- 2013-07-01 CN CN 201310267950 patent/CN103302088A/en active Pending
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2014
- 2014-06-04 CN CN201410242179.1A patent/CN104043644B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103736722A (en) * | 2014-01-13 | 2014-04-23 | 韩清洁 | In-situ polluted soil leaching system and method |
| TWI673096B (en) * | 2014-06-03 | 2019-10-01 | 日商同和永續環境股份有限公司 | Method for detoxifying polluted soil |
| CN106211839A (en) * | 2016-07-15 | 2016-12-14 | 佟保根 | A kind of water discharge method of alkaline land soil |
| CN106211839B (en) * | 2016-07-15 | 2018-11-02 | 佟保根 | A kind of water discharge method of alkaline land soil |
| CN107986555A (en) * | 2017-11-14 | 2018-05-04 | 中电建水环境治理技术有限公司 | Ground water circulation restorative procedure and system based on function pipe network |
| CN108393342A (en) * | 2018-01-30 | 2018-08-14 | 上海岩土工程勘察设计研究院有限公司 | Sub-region and hierarchical in-situ remediation method suitable for the stirring of Polluted Soil shallow-layer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104043644A (en) | 2014-09-17 |
| CN104043644B (en) | 2015-09-16 |
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Application publication date: 20130918 |