CN104043644A - Method for treating soil pollution by using layered circulation cleaning - Google Patents
Method for treating soil pollution by using layered circulation cleaning Download PDFInfo
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- CN104043644A CN104043644A CN201410242179.1A CN201410242179A CN104043644A CN 104043644 A CN104043644 A CN 104043644A CN 201410242179 A CN201410242179 A CN 201410242179A CN 104043644 A CN104043644 A CN 104043644A
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Abstract
The invention relates to a method for treating soil pollution by using layered circulation cleaning, and discloses a method for in-place engineering mode treatment of polluted soil. The method comprises the following steps: arranging infiltration pipe networks on the ground surface and underground in a layered manner, cooperating with a ground water injection system and a sewage treatment system, and cleaning out pollutants in soil by adopting a low pressure irrigation penetration cleaning process. In the invention, an upper layer infiltration pipe network is used for injecting clear water to underground, a lower layer infiltration pipe network is used for collecting polluted water, and polluted soil is cleaned layer by layer from top to bottom until soil provided with the infiltration pipe networks is cleaned to reach prescribed standards. Heavy metals and pollutants separated from the sewage treatment system can be recycled or treated harmlessly. The method fundamentally solves the disadvantages of current polluted land treatment methods, and has the advantages of small equipment investment, high cleaning efficiency, thorough pollutant cleaning, and very high popularization application prospect.
Description
Technical field
The invention belongs to environmental protection technical field, particularly the recovery technique of polluted soil, is a kind of layered circulation cleaning, multi-stage separation treatment utilized, and administers fast the engineering method of soil pollution.The method is also applicable to the pollution control of refuse landfill simultaneously.
Background technology
Due to urban sprawl, insecticide factory, chemical fertilizer factory, chemical plant that some were distributed in urban periphal defence suburb originally etc. becomes 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 the pollution of chemical enterprise or mining smelting enterprise's effluent sewerage and waste gas in addition, and the crops that growth harmful substance exceeds standard, also must just can cultivate in improvement.Town and country refuse landfill diffusate severe contamination soil and groundwater source.Cause for above-mentioned reasons in these soil and contain heavy metal and the poisonous and harmful substance severe overweights such as chromium, lead, mercury, cadmium, arsenic, these harmful substances are mostly dissolved in water, and through for a long time, even the time of decades permeates 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 is on a large scale less at present, and invests huge, consuming time longer.
To the processing of contaminated soil, mostly adopted emergency burial sealing to process in the past, or removed the way of burying sealing processing to strange land, and not only can not fundamentally solve soil pollution problem, and invest length large, consuming time, and also polluted and shift or other hidden danger.
The applicant is on July 1st, 2013 in first to file and disclose same " a kind of layered circulation that utilizes cleans the method for administering soil pollution " (application for a patent for invention number 201310267950.6), and patent retrieval referral centre of State Intellectual Property Office has carried out retrieve and providing search report (search report is numbered G1310430) on October 21st, 2013 with regard to this application.Retrieval conclusion is that claim 1-6 has novelty, creativeness and practicality, meets the regulation of the 22 of Patent Law.But this application causes rejecting because lacking the explanations of accompanying drawing and accompanying drawing in checking process.Given this applicant requires formerly priority again to file an application.
Summary of the invention
The present invention be directed to the problem that existing engineering exists, provide a kind of low pressure to pour water and permeate cleaning soil, once drop into operation steady in a long-term, the method for layered circulation cleaning, the soil pollution of multi-stage separation pollutant control.
A kind of layered circulation that utilizes of the present invention cleans the method for administering soil pollution, comprises
Early-stage preparations:
Flood pattern and sewage disposal system are set on the ground, wherein, flood pattern comprises water-filled pool and water flooding pump station, sewage disposal system comprises water collecting pump, cesspool, sewage-treatment plant and pollutant holding vessel, and the water out up to standard of sewage disposal system is connected with the water-filled pool of flood pattern with valve by pipeline.
On earth's surface, with underground the infiltration pipe network that multilayer is comprised of to the soakaway trench being connected in length and breadth level is set, on earth's surface, between the infiltration pipe network of the bottom, along depth direction, be provided with sump, the end that catchments of each layer of infiltration pipe network connects by tube connector and valve separately and the hoistway that catchments respectively, the water filling end of each layer of infiltration pipe network is respectively by tube connector and valve access ground flood pattern separately, each layer of pipe network interlamellar spacing 0.5-1.5 rice, sump is connected with the water collecting pump of sewage disposal system.
The tube wall of described soakaway trench is provided with hole.
Treatment step:
First, clean the contaminated soil of administering between surface layer and underground ground floor infiltration pipe network, being about to earth's surface infiltration pipe network is communicated with flood pattern, to contaminated soil, evenly pour into clear water, underground ground floor infiltration pipe network is communicated with sump, contaminant water comes together in sump through underground ground floor infiltration pipe network, and earth's surface to the contaminated soil between underground ground floor infiltration pipe network is cleaned; The contaminant water of sump is incorporated into sewage-treatment plant by water collecting pump again and carries out purified treatment, after processing, water up to standard is introduced the water-filled pool of flood pattern, recycle, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation, in wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant is up to standard.
Step 2, clean the contaminated soil of administering between underground ground floor infiltration pipe network and subbasement infiltration pipe network, at this moment, underground ground floor infiltration pipe network is communicated with flood pattern, in contaminated soil, evenly pour into clear water, the subbasement pipe network that seeps water is communicated with sump, and contaminant water comes together in sump through second layer infiltration pipe network, and underground ground floor infiltration pipe network is cleaned with the contaminated soil that subbasement seeps water between pipe network; The contaminant water of sump is incorporated into sewage-treatment plant and carries out purified treatment, after processing, the water-filled pool of water introducing flood pattern up to standard recycles, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation, in wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant is up to standard.
According to the mode of step 2, successively following soil horizon is carried out to contaminated soil cleaning and the dirty water decontamination handles from top to bottom, until require the soil in the processing degree of depth up to standard.
Such scheme also comprises: at the peripheral embedding division board of processed contaminated soil or barrier film, division board comprises precast concrete or plastic plate, metallic plate.
The method of embedding concrete division board is one of longitudinal arrangement or several high-pressure water pipe in division board, high-pressure water pipeline front end near division board bottom laterally connects high pressure water nozzle, high-pressure water pipe is connected with high-pressure hydraulic pump, and division board is by lifting mode insert into stratum under high-pressure water jet.
For requiring to administer the situation that the contaminated soil degree of depth is greater than 5 meters, during early-stage preparations, infiltration vertical shaft is evenly laid along depth direction in gap at underground pipe network, infiltration vertical shaft the degree of depth be greater than 5 meters under ground portion for infiltration well casing, infiltration vertical shaft be connected with sewage disposal system; Clean and administered after 5 meters of above soil layers, through basecoat infiltration pipe network, in soil, pour into clear water, contaminant water is infiltrated vertical shaft, and the contaminated soil of the following part of underground bottom infiltration pipe network is cleaned; Contaminant water is incorporated into sewage-treatment plant through infiltration vertical shaft and carries out purified treatment, after purified treatment, water up to standard is introduced the water-filled pool of flood pattern, recycle, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation, in wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant is up to standard.
Described soakaway trench adopts the punching bellows of diameter 60-110mm, and perforate density is 50-75cm
2/ m, outsourcing filter course; Filter course comprises ore charge, nonwoven, chemical fibre or palm bark, screen pack, and soakaway trench adopts and is arranged in parallel, and spacing is at 5-15 rice.Described infiltration vertical shaft is the filter well that adopts diameter 800-1500mm, 5 meters of above employings well casing that do not seep water, 5 meters of permeable well casings of following employing, infiltration well casing outsourcing filter course, filter course comprises ore charge, nonwoven, chemical fibre or palm bark, screen pack.Described flood pattern also comprises water filling heater.Described sewage-treatment plant is multi-stage sewage treatment device, comprises molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus fiting chemical, biological treatment agent and device.
Such scheme also comprises:
Method of the present invention has following remarkable result;
First, special is the feature permeating the ground with water source for pollutant, by special earth's surface, underground pipe network, design, tie surface flood pattern and sewage disposal system, contaminated soil is carried out to layering cleaning, isolation of purified processing on the spot, the pollutant in soil is administered fast, and the special collection of focusing on waste water reuse and pollutant in governance process, save water source, avoided the secondary pollution of pollutant.
Its two, for seriously polluted region, underground quarantine measures have been proposed, contaminated soil and Soil Surrounding are separated, prevent from that sewage from exosmosing to cause secondary pollution.Provide the special construction method of precast concrete simultaneously, improved efficiency of construction.
Its three, for deep layer contaminant water (soil-5 meter following), coordinate infiltration vertical shaft mode to clean, vertical shaft can reach more than-10 meters deeply, until underground impermeable stratum is realized the management goal under 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 improvement of pollutant is more thorough, has possessed very high popularizing application prospect.
Accompanying drawing explanation
Fig. 1 is that contaminated soil is by water proof enclosure wall isolation schematic diagram
Fig. 2 a, Fig. 2 b, Fig. 2 c are respectively the prefabricated water proof plate of concrete top view, front view, side view
Fig. 3 is soakaway trench network arrangements schematic diagram
Fig. 4 is that infiltration vertical shaft is arranged schematic diagram
Fig. 5 is ground auxiliary facility schematic flow sheet
In figure: the 1st, water proof enclosure wall, the 2nd, contaminated soil, the 3rd, cleaning soil, the 4th, high-pressure water pipe, the 5th, I-steel, the 6th, hanger, the 7th, high pressure water jet pipe, the 8th, division board, the 9th, water flooding pump station, the 10th, underground infiltration pipe network, the 11st, earth's surface infiltration pipe network, the 12nd, tube connector and valve, the 13rd, water-filled pool (filling), the 14th, water injection well, the 15th, sump, the 16th, water collecting pump, the 17th, cesspool (filling), the 18th, infiltration vertical shaft, the 19th, pipe of cement, the 20th, filter sand pipe of cement, the 21st ,-5 meters of cut-off rules, the 22nd, heater, the 23rd, switchgear house, the 24th, sewage second-level is processed, the 25th, pollutant holding vessel, the 26th, sewage coagulation.
The specific embodiment
With reference to accompanying drawing 1-5, a kind of layered circulation that utilizes cleans the method for administering soil pollution, comprises
Early-stage preparations:
To polluting plot, carry out stratified sampling detection, determine that harmful pollutants kind, content, pollutant infiltrate depth of soil etc., require to determine the processing degree of depth of soil according to national standard simultaneously.Adopt ditching pipeline burying machine on earth's surface and the underground multilayer infiltration pipe network of successively burying underground from bottom to top.In the oriented soil of earth's surface soakaway trench netting gear, pour into clear water function; Underground infiltration pipe network is first born and is poured into clear water function according to the variation for the treatment of step, and then bears the function of collecting sewage in soil.The infiltration pipe network of under ground portion is comprised of water injection pipe, collector pipe and Duo Gen soakaway trench.Water injection pipe is connected with the water-filled pool of ground flood pattern with valve through tube connector, and in the sump that collector pipe arranges through valve access depth, is provided with water collecting pump and is connected with the sewage-treatment plant on ground in sump.Many soakaway trench are evenly arranged in parallel, between water injection pipe and collector pipe, and one end access water injection pipe, other end access set water pipe.The density of pipe network arranges that should visit in detail sample analysis result according to soil permeability characteristic determines, the general upper and lower two-layer 0.5-1.5 rice of being separated by, with layer soakaway trench spacing 5-15 rice, the distance between water injection pipe and collector pipe is that the length of soakaway trench is according to the landform size setting of processed contaminated land.
Flood pattern and sewage disposal system are set on ground, wherein, flood pattern comprises water flooding pump station, heater and water-filled pool (tank), sewage disposal system comprises the pumping plant that catchments, cesspool (tank), pollutant holding vessel and multi-stage sewage treatment device, and the water out up to standard of sewage disposal system is connected with the water-filled pool (tank) of flood pattern with control valve by pipeline.Wherein water collecting pump can be provided in a side of ground vavuum pump or be located at the immersible pump in sump.
Treatment step:
First, the contaminated soil between earth's surface and underground ground floor infiltration pipe network is cleaned.Flood pattern is communicated with earth's surface infiltration pipe network, and earth's surface infiltration pipe network is born to contaminated soil and is poured into clear water function.At this moment underground ground floor infiltration pipe network is communicated with sewage disposal system, bears the collecting function of sewage in soil.The sewage collecting enters sump and by water collecting pump introducing sewage-treatment plant, carries out purified treatment again, after purified treatment, water up to standard is introduced the water-filled pool (tank) of flood pattern, recycle, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation.In wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant is up to standard, this layer of contaminated soil cleaning treatment completes.
Step 2, underground ground floor infiltration pipe network is connected with flood pattern, contaminated soil between underground ground floor infiltration pipe network and subbasement infiltration pipe network is poured into clear water, and at this moment subbasement infiltration pipe network is connected with sewage disposal system, bears the collecting function of sewage in soil.The sewage collecting enters sump and by water collecting pump introducing sewage-treatment plant, carries out purified treatment again, after purified treatment, water up to standard is introduced the water-filled pool (tank) of flood pattern, recycle, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation.In wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant i.e. this layer of contaminated soil cleaning treatment up to standard completes.
According to the mode of step 2, successively each layer of soil is carried out to contaminated soil cleaning and the dirty water decontamination handles from top to bottom, until require the soil in the processing degree of depth up to standard.
The order of severity for soil pollution situation, in cleaning process, Soil Surrounding is caused to secondary pollution, the water proof enclosure wall forming 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 pipelines of inner longitudinal arrangement when Prefabricated Concrete division board, high-pressure water pipe front end near division board bottom connects high pressure water nozzle, high-pressure water pipe is connected with high-pressure hydraulic pump, and division board is engaged in insert into stratum under high-pressure water jet by lifting mode.Embedding barrier film needs ditching embedding.The buried depth of division board (film) determines according to soil pollution controlled depth.
For contaminated soil, need process the degree of depth and be greater than 5 meters, the orlop infiltration pipe network of tiling is collected the situation less than deep layer contaminant water, can adopt infiltration vertical shaft mode to collect contaminant water.Vertical shaft adopts quincuncial arrangement, and well depth can reach more than-10 meters.During early-stage preparations, just must determine whether to clean deep soil, as needed, clean, after infiltration piping network laying completes, vertical shaft is set immediately.5 meters of following degree of depth of the vertical depth direction of vertical shaft are all buried permeable sand screen underground, a water collecting pump is respectively set in vertical shaft and extracts the contaminant water of infiltrating, and be connected with ground sewage treating apparatus by water collecting pump, bear the collecting function of 5 meters of following soil sewage.After contaminated soil more than the darkest underground pipe network layer has cleaned, orlop underground pipe network is connected with flood pattern, coordinate the contaminated soil of the following part of orlop underground pipe network is cleaned with infiltration vertical shaft, sewage after cleaning is introduced ground sewage treating apparatus by water collecting pump in vertical shaft and is carried out purified treatment, after purified treatment, water up to standard is introduced the water-filled pool (tank) of flood pattern, recycle, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation.Change of water quality that must monitoring underground water in circulation flushing process, until water quality pollutant up to standard be that deep layer is dirty, dye soil cleaning treatment and complete.
Described soakaway trench adopts the punching bellows of diameter 60-110mm, and punch density is 50-75cm
2/ m, outsourcing filter course prevents that flour sand soil from entering pipeline, filter course comprises sand filtering material, nonwoven, chemical fibre or palm bark, screen pack.Water injection pipe and collector pipe employing diameter are greater than the line pipe of soakaway trench, diameter 110-200mm.Described infiltration vertical shaft is the filter well that adopts diameter 800-1500mm, 5 meters of above employings well casing that do not seep water, and 5 meters following adopts permeable well casings, infiltration well casing outsourcing filter course, filter course comprises ore charge, nonwoven, chemical fibre or palm bark, screen pack.
Described sewage-treatment plant is multistep treatment device, according to the result that early stage, contaminated soil detection was analyzed, determines treatment step and method.Contaminant water enters after the coagulations (pretreatment) such as collecting-tank (tank) precipitation, flocculation, filtration through water collecting pump, enter many-level molecule sieve ion interchange unit or membrane separation device and carry out separating treatment, make it to become recycled water up to standard and enter water-filled pool (tank).According to the pollutant component of contaminated soil, take different sewage treatmentmethods, as: for heavy metal pollution, 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), pollute, can adopt sewage-treatment plant fiting chemical, biological method that pollutant is decomposed into innocuous substance, or adopt the treating apparatus such as microfiltration membranes, milipore filter to process.Because the difference that the diversity of dirty pollutant in water and improvement require is generally the multiple processing mode that adopts various combination in practical application.
In concrete processing procedure, select molecular sieve that match, that absorption affinity is strong and permeable membrane treatment technology according to different exist form and the particle size of pollutant; Following table illustrates for the different selectable treatment technologies of the pollutant components such as heavy metal.
Table one
Below in conjunction with accompanying drawing, above-described embodiment is described further.
Fig. 1 means the contaminated soil of being isolated by water proof enclosure wall, and in figure, 1 is water proof enclosure wall, the 2nd, and contaminated soil, the 3rd, cleaning soil.In the process of cleaning at the layered circulation of pouring water, underground pollution water can ooze toward other places, likely causes secondary pollution, needs in this case, by the same external isolation in region, improvement plot, to prevent that pollutant from leaking.The mode of isolation can adopt the prefabricated plate of concrete, also can adopt other mode.
Fig. 2 a, Fig. 2 b, Fig. 2 c are respectively the prefabricated water proof plate of concrete top view, front view, side view, and in figure, 4 is high-pressure water pipe, the 5th, and I-steel, the 6th, hanger, the 7th, high pressure water jet pipe, the 8th, plate.Water proof plate adopts the method insert into stratum of water-jet under slideway slide plate is controlled, and between plate and plate, by slip casting, is admittedly stitched with cast-in-place cap and is formed integral body, and the gap between stratum and concrete plate adopts water conservancy diversion desilting technology to carry out filling reinforcing.The long 5-15 rice of plate, thick 0.15-0.2 rice, its length and thickness and reinforcing bar configuration design with prefabricated according to the needs of administered soil.
Fig. 3 is scavenge pipe network arrangements figure, and in figure, 9 is water injecting pumps, the 10th, and underground infiltration pipe network, the 11st, earth's surface infiltration pipe network, the 12nd, tube connector and valve, the 13rd, water-filled pool (filling), the 14th, water injection well, the 15th, sump, the 16th, water collecting pump, the 17th, cesspool (filling).Adopt ditching pipeline burying machine successively to lay pipe network from bottom to top at 0--5 rice soil, soakaway trench adopts tolerance compared with punching bellows hot water temperature, diameter 60-110mm, and outsourcing geotextiles or other anti-layers of sand, for preventing that flour sand soil from entering blocking pipe.Utilize water injection pipe to couple together buried many soakaway trench one end, the other end utilizes collector pipe to couple together, and water injection pipe and collector pipe adopt the diameter 110-200mm bellows with soakaway trench tolerance equal temperature.For guaranteeing to clean evenly, Precision land levelling operation, smooth precision ± 5cm will be carried out in the front earth's surface of water filling.
The infiltration coefficient drawing according to soil sample analysis descends bore, spacing and the layer distance of soakaway trench definitely.Underground pipe network adopts paved in multi-layers, the general upper and lower two-layer 0.5-1.5 rice of being separated by, and same layer water injection pipe is apart from 5-15 rice.Soakaway trench is laid by certain slope, is high-endly connected for water filling with water injection pipe, and low side is connected for catchmenting with collector pipe.Every layer of infiltration pipe network is connected with ground water injecting pump through valve, when this layer of underground pipe network, bears while pouring into clear water function, closes other layer of infiltration pipe network with the valve between water injecting pump, opens this layer of pipe network with the cleaning of can pouring water of the valve between water injecting pump simultaneously.Each layer of soakaway trench collects contaminant water and all enters sump, and the in-built water collecting pump of sump is introduced cesspool (tank) by water collecting pump by the underground contaminant water of collecting of oozing out.
Fig. 4 is infiltration vertical shaft layout drawing, and in figure, 18 is infiltration vertical shafts, the 19th, and pipe of cement, the 20th, filter sand pipe of cement, the 21st ,-5 meters of cut-off rules.For darker pollution soil layer (contaminated soil-5 meter following), can adopt infiltration vertical shaft mode to clean, vertical shaft can reach more than-10 meters deeply.Curve movement according to underground water under gravity condition, every 500-1000 square metre beats a bite vertical shaft.The density layout of vertical shaft should be visited in detail sample analysis result and determine by soil, and the soil of good penetrability can be arranged less well location, otherwise can be closeer, and vertical shaft adopts plum blossom shape to lay.
The underground pipe network of vertical shaft and tiling is crossed construction simultaneously, and every mouthful of vertical shaft is joined a water collecting pump, for extracting the underground contaminant water of oozing out.The soil layer that tiling pipe network is controlled completes after cleaning, imbeds the most further underground pipe network and transfers water filling to, opens shaft water-collecting pump and carries out draining.-20 meters of dark vertical shafts can draw up the underground water in-15 meters of above soil come completely, and-15 meters of above soil layers any material that is dissolved in water under high temperature clear water cleans can be taken also separation out of with water and clean out.If require the soil of cleaning darker, can also add deep shaft, until underground impermeable stratum.Vertical shaft is general only for extracting underground pollution water, if with vertical shaft cleanings of pouring water, can rationally adjust the distributing position of water injection well and sump and the degree of depth that seeps water.Vertical shaft is arranged and groundwater abstraction will consider that can not stablize present situation to the underground water in Soil Surrounding causes significant impact, in order to avoid above-ground structures is impaired.
Fig. 5 is ground auxiliary facility flow chart, the 9th, and water injecting pump, the 13rd, water-filled pool (filling), the 17th, cesspool (filling), the 22nd, heater, the 23rd, switchgear house, the 24th, sewage second-level is processed, and the 25th, pollutant holding vessel, the 26th, sewage coagulation.Start ground flood pattern for cleaning contaminated soil, the ground floor pipe network of provided underground starts water suction, by collector pipe, sump and water collecting pump, the water that contains pollutant is extracted and enters cesspool (tank), after the flocculation of cesspool (tank) precipitation, enter coagulation tank, after separating treatment, enter again two stage treatment tank and carry out degree of depth separating treatment, the pollutants such as heavy metal that contain in contaminant water are separated to greatest extent, made it to become recycled clear water and enter water injection tank.Clear water is through heating or add pollutants such as promoting heavy metal to be dissolved in the auxiliary agent of water, reinjects underground, moves in circles, until cleaned.The pollutant of separating enters pollutant storage tank, some recoverables, and what have does harmless treatment.
In order to reduce engineering cost, wherein the treating apparatus of contaminant water can be manufactured skid mounted equipment, with control device, Water Tank, sewage treatment pot, pollutant holding vessel, water injection tank, heater, water pump etc. are linked up with pipeline, configuration power system, the water filling and the pollutant that form modular are processed into covering device.The pipeline adopting in native system is resistance to low-pressure line, and water injecting pump and suction pump are also low-lift pump.Treat that this project governance completes, sundry item still can be used.After contaminated soil has cleaned, underground pipe network, vertical shaft, water proof enclosure wall etc. are all dismountable, and bottommost layer pipe network and a small amount of vertical shaft also can give over to the use of detection.
The contaminant water of refuse landfill is collected and can for collecting sewage, be focused on first at the pre-buried soakaway trench of landfill yard shallow-layer before building field, and later landfill yard rubbish often increases 1-1.5 rice can re-lay one deck soakaway trench, and introduces in sewage collecting pool and focus on.The method that can adopt directional traversing to built soot is imbedded soakaway trench under soot among thin solum, and the sewage drainage of oozing out is focused on.
Claims (6)
1. utilize layered circulation to clean a method of administering soil pollution, it is characterized in that comprising
Early-stage preparations:
Flood pattern and sewage disposal system are set on the ground, wherein, flood pattern comprises water-filled pool and water flooding pump station, sewage disposal system comprises water collecting pump, cesspool, sewage-treatment plant and pollutant holding vessel, and the water out up to standard of sewage disposal system is connected with the water-filled pool of flood pattern with valve by pipeline;
On earth's surface, with underground the infiltration pipe network that multilayer is comprised of to the soakaway trench being connected in length and breadth level is set, on earth's surface, between the infiltration pipe network of the bottom, along depth direction, be provided with sump, tube connector by separately and valve and sump connect the end that catchments of each layer of infiltration pipe network respectively, the water filling end of each layer of infiltration pipe network is respectively by tube connector and valve access ground flood pattern separately, each layer of pipe network interlamellar spacing 0.5-1.5 rice, sump is connected with sewage disposal system water collecting pump;
The tube wall of described soakaway trench is provided with hole;
Treatment step:
First, clean the contaminated soil of administering between surface layer and underground ground floor infiltration pipe network, being about to earth's surface infiltration pipe network is communicated with flood pattern, to contaminated soil, evenly pour into clear water, underground ground floor infiltration pipe network is communicated with sump, contaminant water comes together in sump through underground ground floor infiltration pipe network, and earth's surface to the contaminated soil between underground ground floor infiltration pipe network is cleaned; The contaminant water of sump is incorporated into sewage-treatment plant by water collecting pump again and carries out purified treatment, after processing, water up to standard is introduced the water-filled pool of flood pattern, recycle, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation, in wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant is up to standard;
Step 2, clean the contaminated soil of administering between underground ground floor infiltration pipe network and subbasement infiltration pipe network, at this moment, underground ground floor infiltration pipe network is communicated with flood pattern, in contaminated soil, evenly pour into clear water, the subbasement pipe network that seeps water is communicated with sump, and contaminant water comes together in sump through second layer infiltration pipe network, and underground ground floor infiltration pipe network is cleaned with the contaminated soil that subbasement seeps water between pipe network; The contaminant water of sump is incorporated into sewage-treatment plant and carries out purified treatment, after processing, the water-filled pool of water introducing flood pattern up to standard recycles, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation, in wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant is up to standard;
According to the mode of step 2, successively following soil horizon is carried out to contaminated soil cleaning and the dirty water decontamination handles from top to bottom, until require the soil in the processing degree of depth 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 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 concrete division board is one of longitudinal arrangement or several high-pressure water pipe in division board, high-pressure water pipeline front end near division board bottom laterally connects high pressure water nozzle, high-pressure water pipe is connected with high-pressure hydraulic pump, and division board is by lifting mode insert into stratum under high-pressure water jet.
4. according to the layered circulation that utilizes described in claim 1 or 2,3, clean the method for administering soil pollution, it is characterized in that: for requiring to administer the situation that the contaminated soil degree of depth is greater than 5 meters, during early-stage preparations, infiltration vertical shaft is evenly laid along depth direction in gap at underground pipe network, infiltration vertical shaft the degree of depth be greater than 5 meters under ground portion for infiltration well casing, infiltration vertical shaft be connected with sewage disposal system; Clean and administered after 5 meters of above soil layers, through basecoat infiltration pipe network, in soil, pour into clear water, contaminant water is infiltrated vertical shaft, and the contaminated soil of the following part of underground bottom infiltration pipe network is cleaned; Contaminant water is incorporated into sewage-treatment plant through infiltration vertical shaft and carries out purified treatment, after purified treatment, water up to standard is introduced the water-filled pool of flood pattern, recycle, simultaneously to collecting through the pollutant of sewage-treatment plant purification separation, in wash cycles process, must monitor the change of water quality of underground water, until water quality pollutant is up to standard.
5. according to the layered circulation that utilizes described in claim 1 or 2,3, clean the method for administering soil pollution, it is characterized in that: described soakaway trench adopts the punching bellows of diameter 60-110mm, and perforate density is 50-75cm
2/ m, outsourcing filter course; Filter course comprises ore charge, nonwoven, chemical fibre or palm bark, screen pack; Soakaway trench adopts parallel arrangement mode, and spacing is at 5-15 rice; Described flood pattern also comprises water filling heater; Described sewage-treatment plant is multi-stage sewage treatment device, comprises molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus fiting chemical, biological treatment agent and device.
6. the layered circulation that utilizes according to claim 4 cleans the method for administering soil pollution, it is characterized in that: described soakaway trench adopts the punching bellows of diameter 60-110mm, and perforate density is 50-75cm
2/ m, outsourcing filter course; Filter course comprises ore charge, nonwoven, chemical fibre or palm bark, screen pack, and soakaway trench adopts and is arranged in parallel, and spacing is at 5-15 rice; Described infiltration vertical shaft is the filter well that adopts diameter 800-1500mm, 5 meters of above employings well casing that do not seep water, 5 meters of permeable well casings of following employing, infiltration well casing outsourcing filter course, filter course comprises ore charge, nonwoven, chemical fibre or palm bark, screen pack; Described flood pattern also comprises water filling heater; Described sewage-treatment plant is multi-stage sewage treatment device, comprises molecular sieve ion-exchange processing device or anti-seepage membrane treating apparatus fiting chemical, biological treatment agent and device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242179.1A CN104043644B (en) | 2013-07-01 | 2014-06-04 | A kind of layered circulation that utilizes cleans the method for administering soil pollution |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310267950 CN103302088A (en) | 2013-07-01 | 2013-07-01 | Method for treating soil pollution in a hierarchically cyclic cleaning manner |
| CN201310267950.6 | 2013-07-01 | ||
| CN2013102679506 | 2013-07-01 | ||
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399740A (en) * | 2014-11-18 | 2015-03-11 | 青岛新天地环境保护有限责任公司 | Horizontal water stopping layer structure and method thereof for contaminated soil remediation |
| CN106193216A (en) * | 2016-08-30 | 2016-12-07 | 武汉金牛经济发展有限公司 | A kind of caisson hydrops discharger |
| CN106211839A (en) * | 2016-07-15 | 2016-12-14 | 佟保根 | A kind of water discharge method of alkaline land soil |
| CN106269833A (en) * | 2016-09-18 | 2017-01-04 | 浙江华展工程研究设计院有限公司 | A kind of dialysis apparatus administering soil pollution |
| CN106493165A (en) * | 2016-08-24 | 2017-03-15 | 天津市北方创业园林股份有限公司 | A kind of geavy salt alkali soil improvement structure for sticking weight suitable for quality |
| CN107052040A (en) * | 2017-04-20 | 2017-08-18 | 张红新 | A kind of contaminated soil remediation processing system |
| CN107159698A (en) * | 2017-06-09 | 2017-09-15 | 航天凯天环保科技股份有限公司 | A kind of method that three-dimensional well elution joint stabilizes in-situ remediation soil polluted by heavy metals |
| CN115228924A (en) * | 2022-07-22 | 2022-10-25 | 生态环境部南京环境科学研究所 | Rice field conditioning method for reducing cadmium enrichment of rice in rice field |
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| CN103736722A (en) * | 2014-01-13 | 2014-04-23 | 韩清洁 | In-situ polluted soil leaching system and method |
| JP5647371B1 (en) * | 2014-06-03 | 2014-12-24 | Ｄｏｗａエコシステム株式会社 | Detoxification method for contaminated 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399740A (en) * | 2014-11-18 | 2015-03-11 | 青岛新天地环境保护有限责任公司 | Horizontal water stopping layer structure and method thereof for contaminated soil remediation |
| 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 |
| CN106493165A (en) * | 2016-08-24 | 2017-03-15 | 天津市北方创业园林股份有限公司 | A kind of geavy salt alkali soil improvement structure for sticking weight suitable for quality |
| CN106193216A (en) * | 2016-08-30 | 2016-12-07 | 武汉金牛经济发展有限公司 | A kind of caisson hydrops discharger |
| CN106193216B (en) * | 2016-08-30 | 2019-05-21 | 武汉金牛经济发展有限公司 | A kind of caisson ponding discharger |
| CN106269833A (en) * | 2016-09-18 | 2017-01-04 | 浙江华展工程研究设计院有限公司 | A kind of dialysis apparatus administering soil pollution |
| CN106269833B (en) * | 2016-09-18 | 2024-01-05 | 浙江华展研究设计院股份有限公司 | Dialysis device for treating soil pollution |
| CN107052040A (en) * | 2017-04-20 | 2017-08-18 | 张红新 | A kind of contaminated soil remediation processing system |
| CN107159698A (en) * | 2017-06-09 | 2017-09-15 | 航天凯天环保科技股份有限公司 | A kind of method that three-dimensional well elution joint stabilizes in-situ remediation soil polluted by heavy metals |
| CN115228924A (en) * | 2022-07-22 | 2022-10-25 | 生态环境部南京环境科学研究所 | Rice field conditioning method for reducing cadmium enrichment of rice in rice field |
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| CN104043644B (en) | 2015-09-16 |
| CN103302088A (en) | 2013-09-18 |
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