CN106830157A - The device and method of nonionic surface active agent in extract and separate soil washed liquid - Google Patents
The device and method of nonionic surface active agent in extract and separate soil washed liquid Download PDFInfo
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- CN106830157A CN106830157A CN201710066302.2A CN201710066302A CN106830157A CN 106830157 A CN106830157 A CN 106830157A CN 201710066302 A CN201710066302 A CN 201710066302A CN 106830157 A CN106830157 A CN 106830157A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
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Abstract
The invention discloses a kind of device and method of nonionic surface active agent in extract and separate soil washed liquid, the device includes the hollow fiber module of built-in hollow fiber film assembly；The hollow fiber module has the inlet of membrane solvent and the recovery port of the outlet of membrane solvent waste liquid and the inlet of soil washed liquid and nonionic surface active agent；Soil washed liquid is the soil washed liquid obtained after washing organic polluted soil with nonionic surface active agent, and membrane solvent has relatively low chemical potential or the solvability higher than nonionic surface active agent.The step of the method is to obtain soil washed liquid, and soil washed liquid is injected into hollow fiber module, and recovery obtains nonionic surface active agent, and the hollow fiber module is connected with the inlet of membrane solvent and the outlet of membrane solvent waste liquid.
Description
Technical field
The present invention relates to technical field of sewage, nonionic in a kind of extract and separate soil washed liquid is related in particular to
The device and method of type surfactant.
Background technology
Soil washing is a kind of showering technology, is that the contaminated soil that will be excavated from contaminated site passes through pretreatment
Mix in washing reactor with cleaning solution afterwards, under certain condition, by the auxiliary of the external force such as stirring, make contaminated soil and wash
Wash liquid to have an effect, isolate washed soil and backfilled or advanced treating, while collecting the soil for having obtained being enriched with pollutant
Earth cleaning solution.Soil washing can remove 90~99% volatile organic matter and the organic matter of 40~90% half volatiles.
Soil washed liquid is characterized in hydrophobic containing a large amount of soil particles, nonionic surface active agent and various slightly solubilities
The mixed solution of property organic matter.In soil washing process, in order to reach preferable clean result, usually using higher concentration
Nonionic surface active agent, although a certain amount of nonionic surface active agent of adsorption by soil, but in soil washed liquid
Concentration of nonionic surfactant is still very high.This cleaning solution on the one hand can not directly discharge, furthermore in waste liquid it is non-from
Subtype surfactant can be recycled.If isolating nonionic surface active agent from scrub raffinate, by that can subtract
The purchase cost of few nonionic surface active agent, and realize the discharge of zero waste water in soil washing process.
Hollow fiber conduit is a kind of hydrophobicity macromolecular fibre of tubulose, there is some micropores on tube wall, and porosity about exists
60% or so.With hollow fiber conduit as fixed film, membrane solvent is impregnated with the micropore of hollow-fibre membrane, and infiltrates into opposite side, this
There is mass transfer on film surface in sample, soil washed liquid and membrane solvent, wherein, soil washed liquid is led to by hollow-fibre membrane, membrane solvent
Cross the space of tube bank.
Chinese Patent Application No. 201511026529.1, a kind of entitled " non-ionic surface for reclaiming leached soil solutions
The method of activating agent ", the invention is using excess sludge to polyoxyethylene-type nonionic nonionic surface active agent or biological non-
The less feature of suction-operated of ionic surfactant is different from know-why of the invention.
Chinese Patent Application No. 201110109507.7, entitled " one kind recovery nonionic table from soil washed liquid
The method of face activating agent ", the invention has using activated carbon to nonionic surface active agent in soil washed liquid body and hydrophobicity
Machine thing selective absorption mechanism is different from know-why of the invention.
Chinese Patent Application No. 201510084980.2, it is entitled " extract and separate Organic Chemicals In Groundwater and it is non-from
The device and method of subtype surfactant ", the invention is in the molten of two kinds immiscible (or partial miscibility) using compound
The difference of solubility or distribution coefficient in agent, makes a kind of principle of the compound from another solvent is transferred in solvent, does not have
Have using hollow fiber film assembly of the invention..
It can be seen that, using fixed membrane extraction technology, with hollow-fibre membrane as carrier, separating hydrophobicity organic matter and nonionic
The research of surfactant is also less.
The content of the invention
For the defect of above-mentioned prior art, the present invention provides non-ionic surface in a kind of extract and separate soil washed liquid
The device and method of activating agent, non-ionic surfactant in soil washed liquid is separated by fixed membrane extraction of hollow-fibre membrane
Agent.The hydrophobicity of removal 90% is organic while in soil washed liquid more than 90% nonionic surface active agent can be reclaimed
Thing, does not produce foam in separation process, while non-suitable for volatility and non-volatile organic material contaminated soil cleaning solution
The recovery of ionic surfactant, the nonionic surface active agent isolated may be directly applied to the washing of next round soil
In.
To achieve the above object, the technical solution used in the present invention is：
The device of nonionic surface active agent in a kind of extract and separate soil washed liquid, including built-in hollow-fibre membrane group
The hollow fiber module of part；The hollow fiber film assembly that the hollow fiber film assembly soaked for membrane solvent, the hollow fibre
Dimension membrane device has the inlet and the outlet of membrane solvent waste liquid and the inlet of soil washed liquid and nonionic of membrane solvent
The recovery port of surfactant；The soil washed liquid is to be obtained after washing organic polluted soil with nonionic surface active agent
Soil washed liquid, the membrane solvent has relatively low chemical potential or the solvability higher than nonionic surface active agent.
Used as the improvement to above-mentioned technical proposal, the membrane solvent is n-hexane, n-decane, hexadecane or dichloromethane
In one kind.
Used as the improvement to above-mentioned technical proposal, the nonionic surface active agent is polyethylene glycol to isooctyl phenyl
Ether (TX 100) or polyoxyethylene sorbitan monooleate (Tween 80).
Used as the improvement to above-mentioned technical proposal, the hollow fiber film assembly is that micropore diameter is 0.02-1um, porosity
In the macromolecular fibre membrane module of 50%-80%.
Used as the improvement to above-mentioned technical proposal, the hollow fiber film assembly arranges bunchy by many hollow-fibre membranes
Shape；The hollow-fibre membrane is made by polyethylene, polypropylene, polysulfones or tetrafluoroethene；The hollow-fibre membrane internal diameter is
1.0-5.0mm, external diameter are 2.0-6.0mm.
Used as the improvement to above-mentioned technical proposal, the hollow fiber film assembly also includes being arranged on pencil hollow-fibre membrane
The tube sheet cast with epoxy resin at two ends, the tube sheet is provided with several connected entrances, the inlet of the membrane solvent, it is non-from
The recovery port of subtype surfactant is connected with the connected entrance of lower end tube sheet, the inlet of the soil washed liquid, membrane solvent
The outlet of waste liquid is connected with the connected entrance of upper end tube sheet.
As the improvement to above-mentioned technical proposal, nonionic surface active agent in the extract and separate soil washed liquid
Device also includes passing sequentially through the stirring pool for washing organic polluted soil of pipeline connection, divides for soil washed liquid water and soil
From sedimentation basin, the regulating reservoir for adjusting soil washed liquid water and salinity, hollow fiber module, recovery pond；It is described hollow
Fiber film component is arranged in the inner chamber of hollow fiber module, and the inlet of the regulating reservoir and soil washed liquid, the film are molten
The inlet of agent is connected with membrane solvent supply reservoir by connecting pipe, and peristaltic pump is respectively arranged with the connecting pipe；It is described
The recovery port of recovery pond and nonionic surface active agent, the outlet of the membrane solvent waste liquid and membrane solvent waste liquid gather pond
It is connected by connecting pipe.
Used as the improvement to above-mentioned technical proposal, the present invention is simultaneously provided a kind of using in the extract and separate soil washed liquid
The step of method that the device of nonionic surface active agent reclaims nonionic surface active agent in soil washed liquid, the method
It is：
S1, organic polluted soil is washed with nonionic surface active agent in stirring pool, the solid volume ratio of liquid is 10: 1, is returned
The liquid after washing is received, native water mixed liquid is obtained；
S2, native water mixed liquid is transferred in sedimentation basin, stands 12 hours, collect upper solution, obtain soil washed liquid；
The concentration of nonionic surface active agent is greater than the critical micelle concentration of its three times in soil washed liquid.
S3, soil washed liquid is transferred in regulating reservoir, adds salinity；
S4, hollow fiber film assembly is soaked 12 hours in membrane solvent, reinstalled in hollow fiber module, by wriggling
Pump injects membrane solvent from the inlet of membrane solvent, the outlet outflow of membrane solvent waste liquid, adjusts the inlet injection of membrane solvent
Flow velocity is 10-30mL/min；
S5, etc. membrane solvent waste liquid outlet efflux stabilization after, the soil washed liquid body that will be regulated by peristaltic pump
The inlet of hollow fiber module soil washed liquid is injected, the recovery port discharge of nonionic surface active agent, regulation soil is washed
The inlet injection flow velocity for washing liquid is 80-120mL/min；
S6, etc. nonionic surface active agent recovery port efflux stabilization after, collect efflux, that is, be recycled
Nonionic surface active agent；
After S7, the nonionic surface active agent that will have been reclaimed mix with fresh nonionic surface active agent, then note
Entering stirring pool carries out soil washing.
Used as the improvement to above-mentioned technical proposal, the salinity refers to sodium chloride or calcium chloride, and its concentration is in 100-
Between 200mg/L.
In invention, described hydrophobic organic compound (HOCs) refers to polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, nitryl aromatic class compound
With organo-chlorine pesticide etc., with luxuriant and rich with fragrance (PHE) for representative in the present invention.
The principle of invention is that have different distribution coefficients in hollow-fibre membrane both sides carrier using hydrophobic organic compound.Soil
Nonionic surface active agent majority in cleaning solution is micelle state, and hydrophobic organic compound is generally micelle solubilised state.In mass transfer mistake
Cheng Zhong, the free state hydrophobic organic compound in soil washed liquid can enter in distribution coefficient membrane solvent higher, cause cleaning solution
The chemical potential reduction of middle hydrophobic organic compound, and the chemical potential in nonionic surface active agent micelle is higher, so as to provide
Hydrophobic organic compound, to the motive force of micelle external migration, makes more hydrophobic organic compounds enter in membrane solvent from micelle, and
And, can not be back in nonionic surface active agent micelle into the hydrophobic organic compound in membrane solvent, may finally reclaim
Nonionic surface active agent solution.
Appropriate salinity is added in soil washed liquid, the critical micelle concentration of nonionic surface active agent can be increased,
Increase Jiao-Xin railway, is conducive to the separation of nonionic surface active agent hydrophobic organic compound.
Compared with prior art, the beneficial effect acquired by the present invention is：
The device and method of nonionic surface active agent in extract and separate soil washed liquid of the invention, in separation process
Foam is not produced, while the non-ionic surfactant suitable for volatility and non-volatile organic material contaminated soil cleaning solution
The recovery of agent, the nonionic surface active agent isolated may be directly applied in the washing of next round soil.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is the attachment structure schematic diagram of hollow fiber module of the invention and its associated component；
Fig. 2 is the structural representation of the device of nonionic surface active agent in extract and separate soil washed liquid.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, any modification, equivalent substitution and improvements made etc., should be included within the scope of the present invention.
As shown in Figure 1, 2, in extract and separate soil washed liquid of the invention nonionic surface active agent device, including
The hollow fiber module 1 of built-in hollow fiber film assembly 2；The hollow fibre that the hollow fiber film assembly 2 soaked for membrane solvent
Dimension membrane module, the hollow fiber module 1 has the inlet of membrane solvent and the outlet of membrane solvent waste liquid and soil washing
The inlet of liquid and the recovery port of nonionic surface active agent；The soil washed liquid is to be washed with nonionic surface active agent
Wash the soil washed liquid obtained after organic polluted soil, the membrane solvent has relatively low chemical potential or higher than non-ionic surface
The solvability of activating agent.
Used as the improvement to above-mentioned technical proposal, the membrane solvent is n-hexane, n-decane, hexadecane or dichloromethane
In one kind.
Used as the improvement to above-mentioned technical proposal, the nonionic surface active agent is polyethylene glycol to isooctyl phenyl
Ether (TX 100) or polyoxyethylene sorbitan monooleate (Tween 80).
Used as the improvement to above-mentioned technical proposal, the hollow fiber film assembly 2 is that micropore diameter is 0.02-1um, porosity
In the macromolecular fibre membrane module of 50%-80%.
Used as the improvement to above-mentioned technical proposal, the hollow fiber film assembly 2 arranges bunchy by many hollow-fibre membranes
Shape；The hollow-fibre membrane is made by polyethylene, polypropylene, polysulfones or tetrafluoroethene；The hollow-fibre membrane internal diameter is
1.0-5.0mm, external diameter are 2.0-6.0mm.
Used as the improvement to above-mentioned technical proposal, the hollow fiber film assembly also includes being arranged on pencil hollow-fibre membrane
The tube sheet cast with epoxy resin at two ends, the tube sheet is provided with several connected entrances, the inlet of the membrane solvent, it is non-from
The recovery port of subtype surfactant is connected with the connected entrance of lower end tube sheet, the inlet of the soil washed liquid, membrane solvent
The outlet of waste liquid is connected with the connected entrance of upper end tube sheet.
As the improvement to above-mentioned technical proposal, nonionic surface active agent in the extract and separate soil washed liquid
Device is also including passing sequentially through the stirring pool 3 for washing organic polluted soil of pipeline connection, for soil washed liquid water and soil
Separate 4, the regulating reservoir 5 for adjusting soil washed liquid water and salinity, hollow fiber module 1, recovery pond 8；It is described hollow
Fiber film component is arranged in the inner chamber of hollow fiber module 1, inlet, the film of the regulating reservoir 5 and soil washed liquid
The inlet of solvent is connected with membrane solvent supply reservoir 7 by connecting pipe, and peristaltic pump 9 is respectively arranged with the connecting pipe；
The recovery port of the recovery pond 8 and nonionic surface active agent, the outlet of the membrane solvent waste liquid and membrane solvent waste liquid
Gather pond 6 to be connected by connecting pipe.
Device using nonionic surface active agent in the extract and separate soil washed liquid of the invention reclaims soil and washes
The step of method for washing nonionic surface active agent in liquid, the method is：
S1, organic polluted soil is washed with nonionic surface active agent in stirring pool, the solid volume ratio of liquid is 10: 1, is returned
The liquid after washing is received, native water mixed liquid is obtained；
S2, native water mixed liquid is transferred in sedimentation basin, stands 12 hours, collect upper solution, obtain soil washed liquid；
The concentration of nonionic surface active agent is greater than the critical micelle concentration of its three times in soil washed liquid.
S3, soil washed liquid is transferred in regulating reservoir, adds salinity；
S4, hollow fiber film assembly is soaked 12 hours in membrane solvent, reinstalled in hollow fiber module, by wriggling
Pump injects membrane solvent from the inlet of membrane solvent, the outlet outflow of membrane solvent waste liquid, adjusts the inlet injection of membrane solvent
Flow velocity is 10-30mL/min；
S5, etc. membrane solvent waste liquid outlet efflux stabilization after, the soil washed liquid body that will be regulated by peristaltic pump
The inlet of hollow fiber module soil washed liquid is injected, the recovery port discharge of nonionic surface active agent, regulation soil is washed
The inlet injection flow velocity for washing liquid is 80-120mL/min；
S6, etc. nonionic surface active agent recovery port efflux stabilization after, collect efflux, that is, be recycled
Nonionic surface active agent；
After S7, the nonionic surface active agent that will have been reclaimed mix with fresh nonionic surface active agent, then note
Entering stirring pool carries out soil washing.
Used as the improvement to above-mentioned technical proposal, the salinity refers to sodium chloride or calcium chloride, and its concentration is in 100-
Between 200mg/L.
In invention, described hydrophobic organic compound (HOCs) refers to polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, nitryl aromatic class compound
With organo-chlorine pesticide etc., the present invention is with luxuriant and rich with fragrance (PHE) for representative.
The principle of invention is that have different distribution coefficients in hollow-fibre membrane both sides carrier using hydrophobic organic compound.Soil
Nonionic surface active agent majority in cleaning solution is micelle state, and hydrophobic organic compound is generally micelle solubilised state.In mass transfer mistake
Cheng Zhong, the free state hydrophobic organic compound in soil washed liquid can enter in distribution coefficient membrane solvent higher, cause cleaning solution
The chemical potential reduction of middle hydrophobic organic compound, and the chemical potential in nonionic surface active agent micelle is higher, so as to provide
Hydrophobic organic compound, to the motive force of micelle external migration, makes more hydrophobic organic compounds enter in membrane solvent from micelle, and
And, can not be back in nonionic surface active agent micelle into the hydrophobic organic compound in membrane solvent, may finally reclaim
Nonionic surface active agent solution.
Appropriate salinity is added in soil washed liquid, the critical micelle concentration of nonionic surface active agent can be increased,
Increase Jiao-Xin railway, is conducive to the separation of nonionic surface active agent hydrophobic organic compound.
Compared with prior art, the beneficial effect acquired by the present invention is：
The device and method of nonionic surface active agent in extract and separate soil washed liquid of the invention, in separation process
Foam is not produced, while the non-ionic surfactant suitable for volatility and non-volatile organic material contaminated soil cleaning solution
The recovery of agent, the nonionic surface active agent isolated may be directly applied in the washing of next round soil.
Embodiment 1
1) organic polluted soil 1 is cleaned in stirring pool with the solution containing nonionic surface active agent TX100, liquid is solid
Volume ratio is 10: 1, and cleaning fluid is transferred in sedimentation basin, and the liquid after washing is reclaimed after removal solid particulate matter, obtains soil and washes
Liquid is washed, 2683mg/L containing nonionic surface active agent in the soil washed liquid, luxuriant and rich with fragrance 46mg/L is detected；
2) sodium chloride of various concentrations is added in regulating reservoir, the salinity of soil washed liquid is adjusted；
3) it is membrane solvent using n-hexane, in hollow fiber film assembly, n-hexane is injected the inlet of membrane solvent, adjusts
Throttling speed is 20mL/min, after the outlet of membrane solvent waste liquid goes out stream stabilization, soil washed liquid is injected the note of soil washed liquid
Entrance, regulation flow velocity is 100mL/min, and efflux is collected from the recovery port of nonionic surface active agent, that is, obtain recovered liquid.
Detection：The detection of nonionic surface active agent and phenanthrene uses high performance liquid chromatography.
Result see the table below：
Embodiment 2,
1) after cleaning organic polluted soil 1 in stirring pool with the solution containing nonionic surface active agent TW80, liquid
Gu volume ratio is 10: 1, cleaning fluid is transferred in sedimentation basin, and the liquid after washing is reclaimed after removal solid particulate matter, detects the soil
3266mg/L containing nonionic surface active agent in earth cleaning solution, luxuriant and rich with fragrance 41mg/L；
2) sodium chloride of various concentrations is added in regulating reservoir, the salinity of soil washed liquid is adjusted；
3) it is membrane solvent using n-hexane, in hollow fiber film assembly, n-hexane is injected the inlet of membrane solvent, adjusts
Throttling speed is 20mL/min, after the outlet of membrane solvent waste liquid goes out stream stabilization, soil washed liquid is injected the note of soil washed liquid
Entrance, regulation flow velocity is 100mL/min, and efflux is collected from the recovery port of nonionic surface active agent, that is, obtain recovered liquid.
Detection：The detection of nonionic surface active agent and phenanthrene uses high performance liquid chromatography.
Result see the table below：
Embodiment 3,
1) concentration of nonionic surfactant after being washed in view of actual soil is unique, and old friend's work prepares various concentrations
Nonionic surface active agent and hydrophobic organic compound coexist solution, simulate actual soil washed liquid；
2) sodium chloride of solution addition various concentrations is being prepared, is adjusting the salinity of solution；
3) it is membrane solvent using n-hexane, in hollow fiber film assembly, n-hexane is injected the inlet of membrane solvent, adjusts
It is 20mL/min that throttling is fast, after the outlet of membrane solvent waste liquid goes out stream stabilization, will prepare the injection of solution injection soil washed liquid
Mouthful, regulation flow velocity is 100mL/min, and efflux is collected from the recovery port of nonionic surface active agent, that is, obtain recovered liquid.
Detection：The detection of nonionic surface active agent and phenanthrene uses high performance liquid chromatography.
As a result
In order to prevent that the generation that two kinds of solution is interpenetrated occurs in process of the test, the flow velocity of soil washed liquid is kept to want
Higher than the flow velocity of membrane solvent.Experiment shows, after adding salinity, according to " analysis of salt dissolved salt " principle, can simultaneously improve nonionic
The rate of recovery of surfactant and the clearance of hydrophobic organic compound.
Although above having used general explanation, specific embodiment and experiment, the present invention is made to retouch in detail
State, but on the basis of the present invention, it can be made some modifications or improvements, this is to those skilled in the art apparent
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed
Scope.
Claims (9)
1. in a kind of extract and separate soil washed liquid nonionic surface active agent device, it is characterised in that in built-in
The hollow fiber module of hollow fiber membrane module；The hollow fiber film assembly that the hollow fiber film assembly soaked for membrane solvent,
The hollow fiber module has the inlet of membrane solvent and the outlet of membrane solvent waste liquid and the inlet of soil washed liquid
With the recovery port of nonionic surface active agent；The soil washed liquid is to wash organic contamination with nonionic surface active agent
The soil washed liquid obtained after soil, the membrane solvent has relatively low chemical potential or molten higher than nonionic surface active agent
Solution ability.
2. in extract and separate soil washed liquid according to claim 1 nonionic surface active agent device, its feature
It is that the membrane solvent is the one kind in n-hexane, n-decane, hexadecane or dichloromethane.
3. in extract and separate soil washed liquid according to claim 1 nonionic surface active agent device, its feature
It is that the nonionic surface active agent is polyethylene glycol to isooctyl phenyl ether or polyethenoxy sorbitan list oleic acid
Ester.
4. in extract and separate soil washed liquid according to claim 1 nonionic surface active agent device, its feature
Be, the hollow fiber film assembly be micropore diameter be 0.02-1um, porosity 50%-80% macromolecular fibre film group
Part.
5. in extract and separate soil washed liquid according to claim 4 nonionic surface active agent device, its feature
It is that the hollow fiber film assembly arranges fasciculation by many hollow-fibre membranes；The hollow-fibre membrane is by polyethylene, poly- third
Alkene, polysulfones or tetrafluoroethene are made；The hollow-fibre membrane internal diameter is 1.0-5.0mm, external diameter is 2.0-6.0mm.
6. in extract and separate soil washed liquid according to claim 5 nonionic surface active agent device, its feature
It is that the hollow fiber film assembly also includes being arranged on the tube sheet cast with epoxy resin at pencil hollow-fibre membrane two ends,
The tube sheet is provided with several connected entrances, and the inlet of the membrane solvent, the recovery port of nonionic surface active agent are with
The connected entrance of end pipe plate is connected, the company of the inlet, the outlet of membrane solvent waste liquid and upper end tube sheet of the soil washed liquid
Port is connected.
7. in extract and separate soil washed liquid according to claim 6 nonionic surface active agent device, its feature
It is that the device of nonionic surface active agent also includes passing sequentially through pipeline connection in the extract and separate soil washed liquid
For washing the stirring pool of organic polluted soil, the sedimentation basin, dense for adjusting soil washed liquid for soil washed liquid layering
The regulating reservoir of degree, hollow fiber module, recovery pond；The hollow fiber film assembly is arranged in the inner chamber of hollow fiber module,
The inlet of the regulating reservoir and soil washed liquid, the inlet of the membrane solvent and membrane solvent supply reservoir pass through connecting pipe phase
Connection, peristaltic pump is respectively arranged with the connecting pipe；It is the recovery port of the recovery pond and nonionic surface active agent, described
The outlet of membrane solvent waste liquid is connected with the pond of gathering of membrane solvent waste liquid by connecting pipe.
8. the device of nonionic surface active agent is reclaimed in extract and separate soil washed liquid described in a kind of utilization claim 1-7
The method of nonionic surface active agent in soil washed liquid, it is characterised in that be the step of the method：
S1, organic polluted soil is washed with nonionic surface active agent in stirring pool, the solid volume ratio of liquid is 10: 1, and recovery is washed
Liquid after washing, obtains native water mixed liquid；
S2, native water mixed liquid is transferred in sedimentation basin, stands 12 hours, collect upper solution, obtain soil washed liquid；Soil
The concentration of nonionic surface active agent is greater than the critical micelle concentration of its three times in cleaning solution.
S3, soil washed liquid is transferred in regulating reservoir, adds salinity；
S4, hollow fiber film assembly is soaked 12 hours in membrane solvent, reinstalled in hollow fiber module, will by peristaltic pump
Membrane solvent injects from the inlet of membrane solvent, the outlet outflow of membrane solvent waste liquid, adjusts the inlet injection flow velocity of membrane solvent
It is 10-30mL/min；
S5, etc. after the outlet efflux stabilization of membrane solvent waste liquid, the soil washed liquid body that will be regulated by peristaltic pump is injected
The inlet of hollow fiber module soil washed liquid, the recovery port discharge of nonionic surface active agent, adjusts soil washed liquid
Inlet injection flow velocity be 80-120mL/min；
S6, etc. nonionic surface active agent recovery port efflux stabilization after, collect efflux, that is, be recycled it is non-from
Subtype surfactant.
9. in extract and separate soil washed liquid according to claim 8 nonionic surface active agent device, its feature
It is that the salinity refers to sodium chloride or calcium chloride, and its concentration is between 100-200mg/L.
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Cited By (1)
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| CN107902828A (en) * | 2017-11-21 | 2018-04-13 | 四川理工学院 | The recovery method of Coal Gas Washing Cycling Water nonionic surfactant |
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