CN107879531A - The recovery process of surfactant in waste water - Google Patents

The recovery process of surfactant in waste water Download PDF

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Publication number
CN107879531A
CN107879531A CN201711166980.2A CN201711166980A CN107879531A CN 107879531 A CN107879531 A CN 107879531A CN 201711166980 A CN201711166980 A CN 201711166980A CN 107879531 A CN107879531 A CN 107879531A
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CN
China
Prior art keywords
surfactant
waste water
organic solvent
particulate
resin
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CN201711166980.2A
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Chinese (zh)
Inventor
邹伟
颜杰
杨虎
陈炯
邓礼洪
李斌
龙凤
黄宇祥
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Zhonghao Chenguang Research Institute of Chemical Industry Co Ltd
Sichuan University of Science and Engineering
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Zhonghao Chenguang Research Institute of Chemical Industry Co Ltd
Sichuan University of Science and Engineering
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Priority to CN201711166980.2A priority Critical patent/CN107879531A/en
Publication of CN107879531A publication Critical patent/CN107879531A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/06Flash evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/26Treatment of water, waste water, or sewage by extraction
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/285Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/301Detergents, surfactants
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/10Energy recovery

Abstract

The invention provides the recovery process of surfactant in waste water, including surfactant concentrate, solvent extraction, the workshop sections such as secondary waste water processing, before wastewater treatment, first analyze the species and concentration of surfactant in waste water, from different handling process, when surfactant qualities percentage concentration is more than 1.0% in waste water, first pass around surfactant in extraction process extraction recovery waste water, and waste water outer row after concentrate, it is less than 1.0% waste water for mass percentage concentration, first after concentrate process discharges clear water, foam extracts recovery surfactant therein again through defoaming.The relatively existing treatment technology that harmful substance is innoxious, the present invention realize the recycling of waste resource, simple and reliable process, cost is low, does not produce subsidiary pollution to reclaim based on the surfactant in waste water.

Description

The recovery process of surfactant in waste water
Technical field
The invention belongs to waste resource recycling field, and in particular to the recovery process of surfactant in waste water.
Technical background
Surfactant is referred to as " industrial monosodium glutamate ", suffers from being widely applied in the every field of national product life. But surfactant after Yi Dan can be all directly discharged in natural environment, the surface-active being discharged into natural environment Agent is easily bubbled, and the oxygen exchange completely cut off between water body and environment, causes water body smelly.Caused to eliminate surfactant discharge Environmental problem, primarily now realize surfactant in waste water using biochemical degradation, advanced oxidation and membrane technology Removing.
But part surface activating agent can produce during natural degradation has the chemical combination seriously endangered to ecology and human body Thing, such as APES class, its caused alkyl phenol in degradation process is typical environmental estrogens.And surface is lived The synthesis of property agent generally requires special equipment and consumes substantial amounts of resource, therefore is directly discharged to natural environment after being processed to In and a kind of serious wasting of resources.
And relative to other organic pollutions, surfactant has special absorption property, its energy in UF membrane Enough change the characteristic of film, reduce separative efficiency, even result in the blocking and failure of film, therefore do not form wastewater surface work so far Property agent recovery reliable process.
The content of the invention
For deficiencies of the prior art, it is an object of the invention to provide surfactant is reclaimed from waste water Technique, solve the problems, such as that existing method surfactant waste water cost is high, difficulty is big, the wasting of resources.
To achieve the above object, the present invention adopts the following technical scheme that:
The recovery process of surfactant, comprises the following steps in waste water:
(1)Flotation material is added into the mixing and stirring tank equipped with surface active agent wastewater, after stirring, will be contained described floating The waste water of material selection is pumped into airfloat equipment, flotation material is discharged with foam by bubbling, after foam fraction factor, removes surface The water of activating agent is discharged from airfloat equipment bottom, after testing its CODCrArranged outside after being down to 10 ~ 40mg/L;
Wherein, for the mass percentage concentration of surfactant below 1.0%, the dosage of the flotation material is 1 in the waste water ~ 10kg/ tons;
When the surfactant is anion surfactant, the flotation material of addition is the positively charged particulate in surface;
When the surfactant is cationic surfactant, the flotation material of addition is the negatively charged particulate in surface;
When the surfactant is nonionic surfactant, the flotation material of addition is that can form hydrogen bond and be complexed micro- Grain;
The use of with liquid volume ratio in foam is 0.1 ~ 1 in the foam outlet of airfloat equipment:1 organic solvent is to isolating Foam carries out spray elution, and the liquid filtering after elution, for recovery flotation material to recycle, filtrate pump enters to stand liquid separation tank In, stand 2 ~ 12h and be layered;
Or the earthenware slab membrane filtration by waste water by 20 ~ 100nm, the filtrate after filtering can directly discharge, in the residual of filtering Night volume ratio is(0.1-1:1)Organic solvent, be pumped into after stirring stand liquid separation tank in, stand 2 ~ 12h be layered;
Or the adsorption tower for laying waste water by modified resin, after removing surfactant therein, entered using organic solvent Row elution, eluent, which is pumped into, to be stood in liquid separation tank, is stood 2 ~ 12h and is layered;
(2)Aqueous phase after layering is pumped into flash vessel, evaporative condenser, which reclaims organic solvent therein and is recycled to, stands liquid separation tank In, remove the aqueous phase after organic solvent and be recycled in mixing and stirring tank, or the aqueous phase after removal organic solvent is passed through into modification The adsorption tower of resin laying, after removing surfactant therein, is eluted, eluent is recycled to using the organic solvent Stand in liquid separation tank;
Or the earthenware slab membrane filtration by the aqueous phase after layering by 20 ~ 100nm, the water after filtering are arranged outside, filtrate cycle is extremely In mixing and stirring tank;
(3)The organic phase stood after being layered in tank is pumped into distiller, evaporates and condenses recovery organic solvent to recycle, It is remaining as to reclaim obtained surfactant.
Before handling waste water using the inventive method, first waste component is analyzed, determines surfactant in waste water Species and concentration, 1.0% low concentration surfactant waste water is less than for surfactant concentration, the present invention can be used directly Method is handled, and first by waste water concentrate, then extracts surfactant therein, waste water is through step of the present invention(1)Foam fraction factor Afterwards, the content of surfactant is between 3 ~ 15% in foam, and wherein protein separator may be selected in airfloat equipment.
It is more than 1% concentrated surfactant waste water for surfactant concentration, is carried first with organic solvent Take, reclaim the surfactant in organic phase, remaining aqueous phase is outer again after concentrate to arrange, and comprises the following steps that:
(a)It is 0.1 ~ 1 first to add with wastewater volume ratio:1 organic solvent, standing is pumped into after being stirred in mixing and stirring tank In liquid separation tank, stand 2 ~ 12h and be layered;
(b)The water layer stood after being layered in tank is pumped into flash vessel, evaporative condenser reclaims organic solvent therein and is recycled to quiet Put in liquid separation tank, remove the water layer after organic solvent and be recycled in mixing and stirring tank, according to described step(1)、(2)With(3) Handled;
Or the adsorption tower for laying the water layer after above-mentioned removal organic solvent by modified resin, remove surface-active therein After agent, eluted using the organic solvent, eluent is recycled to step(a)Stand in liquid separation tank;
Or the earthenware slab membrane filtration by the water layer after layering by 20 ~ 100nm, the water after filtering are arranged outside, filtrate cycle is extremely Step(a)In mixing and stirring tank;
(c)Organic layer after layering is pumped into evaporator, is evaporated and is condensed recovery organic solvent to recycle, remaining to be The surfactant of recovery;
Above-mentioned steps(c), purged using nitrogen, argon gas, carbon dioxide or vapor, accord with the purity of surfactant Close the requirement recycled
Preferably, the anion surfactant is alkylsurfuric acid salt, alkyl benzene sulphonate sodium salt, aliphatic alcohol sulfate Class, fatty acid salt, alkylbenzoic acid salt, alkyl phosphoric acid salt, fatty alcohol polyoxyethylene ether sulfate class, fatty alcohol polyoxy Vinethene phosphoric acid salt or alkyl acid ester sulfonates class.
Wherein alkylsurfuric acid salt includes dodecyl sodium sulfate and myristyl sodium sulfonate etc., alkyl benzene sulphonate sodium salt Including cetyl benzenesulfonic acid sodium, cetyl benzenesulfonic acid potassium, neopelex and Potassium dodecylbenzenesulfonate etc., fat Fat alcohol sulfate includes sldium lauryl sulfate, laruyl alcohol potassium sulfate, tetradecyl alchohol sodium sulphate and tetradecyl alchohol potassium sulfate etc., soap Class includes odium stearate, sodium palmitate, potassium stearate and palmitic acid potassium etc., and alkylbenzoic acid salt is included to octyl benzoic acid sodium Deng alkyl phosphoric acid salt includes ferric tri-dodecanesulfonate and myristyl sodium phosphate etc., fatty alcohol polyoxyethylene ether sulfate class Including Dodecyl Polyoxyethylene Ether sodium sulphate and tetradecyl alchohol polyethenoxy ether sodium sulfate etc., AEO phosphoric acid salt Including Dodecyl Polyoxyethylene Ether sodium phosphate, Dodecyl Polyoxyethylene Ether potassium phosphate and tetradecyl alchohol APEO sodium phosphate etc..
Preferably, the positively charged particulate is silica, aluminum oxide, titanium oxide, ferroso-ferric oxide, three oxidations Two iron, calcium carbonate, magnesium hydroxide, magnetite powder, ground hematite, gypsum miberal powder, feldspar miberal powder or quartzy miberal powder, and adjust waste water PH value be less than the particulate isoelectric point, make the particulate positively charged;It is either cation organic resin particulate or is table Face is grafted with the solia particle of quaternary ammonium salt Huo quaternary alkylphosphonium salts.The positively charged diameter of particle is preferably 1 ~ 10000nm.
It is DTAB, tridecyl trimethyl bromination as the preferred cationic surfactant Ammonium, TTAB, cetyl trimethylammonium bromide, Cetyltrimethylammonium bromide, tetrabutyl phosphonium bromide Ammonium, DTAC, tridecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, cetyl three Ammonio methacrylate, OTAC, tetrabutylammonium chloride, TBAB, to octyl phenyl front three bromide Change ammonium or to octyl phenyl trimethylammonium bromide.
Preferably, the negatively charged particulate is silica, aluminum oxide, titanium oxide, ferroso-ferric oxide, three oxidations Two iron, calcium carbonate, magnesium hydroxide, magnetite powder, ground hematite, gypsum miberal powder, feldspar miberal powder or quartzy miberal powder, and adjust waste water PH value be higher than the particulate isoelectric point, make the particulate negatively charged;It is either anion organic resin particulate or is table Face is grafted with the particulate of carboxyl, sulfonic group or phosphate.The negatively charged diameter of particle is preferably 10 ~ 10000nm.
As the preferred nonionic surfactant be fatty alcohol polyethenoxy ether class, APES class, Polyoxyethylene carboxylate class, fatty acid methyl ester ethoxylate, expoxy propane and ethylene oxide copolymer, alkylolamides class Or arlacels.
Wherein, fatty alcohol polyethenoxy ether class includes ethoxylated dodecyl alcohol class, ten four carbon alcohols polyethenoxy ether class, whale Ceryl alcohol polyethenoxy ether class etc., APES include OP, NP and peregal series, and sorbitan ester includes this Pan's series and TWEEN Series.
Preferably, the particulate that can form hydrogen bond is silica, aluminum oxide, titanium oxide, ferroso-ferric oxide, three Two iron, calcium carbonate, magnesium hydroxide, magnetite powder, ground hematite, gypsum miberal powder, feldspar miberal powder or quartzy miberal powder are aoxidized, and in institute After stating microparticle surfaces cladding inertia organic resin, silica, then in surface grafting amino, hydroxyl or sulfydryl.It is described being capable of shape Diameter of particle into hydrogen bond is preferably 10 ~ 10000nm.
Preferably, step(1)Described in surfactant when being nonionic surfactant, the suction in the adsorption tower Enclosure material is amino or carboxy-modified expanded polystyrene resin, either for amino modified phenolic resin or be amino Modified melamine resin;Wherein amino can the grafting by way of nitrifying and reducing;
When the surfactant is cationic surfactant, the sorbing material in the adsorption tower gathers for sulfonic group modified Styrene, either for sulfonic group modified phenolic resin or be sulfonic group modified melamine resin;Wherein sulfonation process be by Resin particle reacts with the concentrated sulfuric acid or sulfur trioxide, is then neutralized and obtained with alkali such as sodium hydroxide, sodium carbonate again.
When the surfactant is anion surfactant, the sorbing material in the adsorption tower is amino modified Polystyrene, either for amino modified phenolic resin or be amino modified melamine resin, the pH of regulation waste water during use Isoelectric point of the value less than the resin.
Preferably, step(1)In for nonionic surfactant, the organic solvent is n-butanol, 2- butanol, two Methyl butanol, n-amyl alcohol, 2- amylalcohols, isoamyl alcohol, cyclopentanol, 2- methylcyclopentanols, n-hexyl alcohol, cyclohexanol, 2- hexanols, 2- methyl Amylalcohol, n-heptanol, enanthol, n-octyl alcohol, isooctanol, tripropyl amine (TPA), tri-isopropyl amine, tri-n-butylamine, triisobutylamine, triamylamine, three oneself Amine, tricyclohexyltin amine, methyl formate, Ethyl formate, propyl formate, isopropyl formate, butyl formate, methyl acetate, ethyl acetate, Propyl acetate, isopropyl acetate, butyl acetate, methyl propionate, ethyl propionate, isopropyl propionate, butyl propionate, dimethyl ether, second One kind in ether, propyl ether, butyl ether, tetrahydrofuran, dichloromethane, chloroform, dichloroethanes, vinyl chloride, dichloroethylene or two Kind mixing;
For anion surfactant, the organic solvent is:A kind of corresponding to above-mentioned Composed of Non-ionic Surfactant or In two kinds of solvents, tripropyl amine (TPA), tri-isopropyl amine, tri-n-butylamine, tri-n-butylamine, triisobutylamine, triamylamine, trihexylamine or three rings are added Hexylamine, and solvent pH is adjusted as acidity;
For cationic surfactant, the organic solvent is:A kind of corresponding to above-mentioned Composed of Non-ionic Surfactant or In two kinds of solvents, the organic acids such as citric acid, tartaric acid, malic acid or gluconic acid are added, and adjust solvent pH as alkalescence.
Compared with prior art, the present invention has the advantages that:
1st, the present invention utilizes the process such as air supporting concentrate, organic solvent extraction, distillation, flash distillation or UF membrane that surface in waste water can be lived Property agent recovery, content of organics is relatively low in the waste water after processing, meets emission request of the country to industrial wastewater, the surface of recovery Activating agent also meets the needs of its application.The present invention is reclaimed the surfactant in waste water as resource, is not only lowered The discharge of noxious pollutant, also achieves the recovery of useful resources, is a kind of sustainable sewage disposal technology.
2nd, the present invention is using absorption plus the method for foam fraction factor, not only efficiency high but also technique is simple, the waste water after processing Can directly discharge, and surface-active contents are higher in foam, using Surfactant have larger solvability without Organic solvent soluble in water carries out defoaming elution and extraction, surfactant therein recoverable after distillation, elution The organic solvent reusable edible that adsorbent particles and condensation afterwards obtain, processing procedure do not produce subsidiary pollution.Relative to existing The treatment technology that harmful substance is innoxious, the present invention realizes discarded money to reclaim based on the surfactant in waste water The recycling in source, simple and reliable process, cost is low, does not produce subsidiary pollution.
3rd, this technology realizes waste water by the way that the techniques such as surfactant concentrate, surfactant extraction are organically combined The removing and recovery of middle surfactant, the technique extracted after first concentrate is used for low concentration surfactant, to high concentration Then using the process route of concentrate after first extracting, final draining reaches national emission request directly to discharge or follow surfactant Ring utilizes.
Brief description of the drawings
Fig. 1 is embodiment 1 and the concentrated surfactant recovery process flow of embodiment 2.
Fig. 2 is embodiment 3 and the low concentration surfactant recovery process flow of embodiment 7.
Fig. 3 is the UF membrane low concentration surfactant recovery process flow of embodiment 4.
Fig. 4 is the concentrated surfactant recovery process flow of embodiment 5.
Fig. 5 is the concentrated surfactant recovery process flow of embodiment 6.
Embodiment
Embodiment 1:The handling process of polytetrafluoroethylene (PTFE) chemistry thickened waste water
Need to concentrate emulsion in the production of polytetrafluoroethylene (PTFE) dispersion emulsion, 13 excessive secondary alcohol are added in emulsion and are gathered Oxygen vinethene -10(E1310)Make creaming of emulsion, its upper strata is product, and lower floor is high concentration nonionic surfactant waste water, is given up E1310 mass percentage concentration is 6-8% in water, belongs to concentrated surfactant waste water.
The waste water is pumped into agitator tank, and using measuring pump be pumped into wastewater volume 25% isoamyl alcohol be sufficiently mixed after, will Mixture is transferred to standing tank, and the temperature for keeping standing tank is 40 DEG C, and 10h is stood in tank is stood makes mixture be layered completely Afterwards, upper organic phase is transferred in alembic, be evaporated under reduced pressure below 100 DEG C, and purged using nitrogen, gas is pure organic Alcohol removes completely, and the alcohol of removing is recycled to solvent tank.
Lower floor's waste water is transferred to flash tank, after removing organic solvent therein using flash distillation, is pumped into secondary blending tank, and at it It is middle according to waste water per ton add 2kg particle diameters be the amino modified fine silica powders of 200nm, after being sufficiently mixed, be pumped into Protein Separation Device, by controlling the flow of liquids and gases wherein solid powder is separated with bubble from water, the clear water after processing is through analysis Its CODcr is 25mg/L, directly can discharge or recycle.After foam enters spray column spray system, sprayed using isoamyl alcohol, Solid enters powder materials storehouse after elution after eluate is filtered, and liquid circulation to stratification tank carries out stratification, its time Skill of knocking off is as shown in Figure 1.
Embodiment 2:The handling process of polytetrafluoroethylene (PTFE) chemistry thickened waste water
Need to concentrate emulsion in the production of polytetrafluoroethylene (PTFE) dispersion emulsion, excessive octyl phenol polyoxy is added in emulsion Vinethene(TX-100)Make creaming of emulsion, its upper strata is product, and lower floor is high concentration nonionic surfactant waste water, in waste water TX-100 mass percentage concentration is 6-8%, belongs to concentrated surfactant waste water.
The waste water is pumped into agitator tank, and the tri-n-butylamine amylalcohol for being pumped into using measuring pump wastewater volume 30% is sufficiently mixed Afterwards, mixture is transferred to standing tank, and the temperature for keeping standing tank is 40 DEG C, 10h is stood in tank is stood makes mixture complete After layering, upper organic phase is transferred in alembic, is evaporated under reduced pressure below 100 DEG C, and is purged using nitrogen, will be organic Solvent removes completely, and the solvent of removing is recycled to solvent tank.
Lower floor's waste water is transferred to flash tank, after removing organic solvent therein using flash distillation, is pumped into secondary blending tank, and at it Middle to add 2kg particle diameters according to waste water per ton be 200nm amino melamine resin micro mists, after being sufficiently mixed, is pumped into protein separator, logical Crossing the flow of control liquids and gases makes wherein solid powder be separated with bubble from water, and the clear water after processing is through analyzing it CODcr is 25mg/L, directly can discharge or recycle.After foam enters spray column spray system, sprayed using isoamyl alcohol, will Solid enters powder materials storehouse after elution after eluate filtering, and liquid circulation to stratification tank carries out stratification, and it is reclaimed Technique is as shown in Figure 1.
Embodiment 3:The recovery method of low concentration anion emulsifier in polymer production waste water
Need to add surfactant in emulsion polymerization as emulsifying agent, generally use anion according to the different of polymer more Surfactant(Such as sodium alkyl benzene sulfonate or aliphatic acid)And nonionic emulsifier(As AEO and alkyl phenol gather Oxygen ethene ethers).
Cetyl benzenesulfonic acid sodium is such as used in phenolic resin building-up process, and as emulsifying agent, it is in caused waste water Mass percentage concentration is 0.5%, belongs to low concentration surfactant waste water, the technique extracted again using first concentrate.
Waste water is introduced into auger tank first, it is the ultra-fine carbonic acid of 2000 purposes that 5kg granularities are added in waste water per ton Calcium powder, and the pH of appropriate sulfuric acid regulation waste water is added between 5.0-5.5.By the waste water input albumen separator after regulation In, the flow of air in the flow and air-blowing pump by controlling waste water so that the solia particle in waste water can be with foam It is floating.
Foam is transferred to spray column after bubbling to top, and the waste water after handling is released from the lower end of protein separator, from Apparent see can not form stable foam, and its COD is determined through analysisCrFor 35mg/L, reach the discharge standard of National Industrial sewage.
Foam filters after carrying out defoaming elution using tri-n-butylamine in spray column, and wherein solia particle is recycled to agitator tank Recycle, sulphur acid for adjusting pH is added in filtrate to 6-6.5, then stratification, after strict levels be present in system, lower floor Waste water flashes Posterior circle further concentrate into auger tank.Sodium hydroxide is added in upper organic phase, adjusts pH to 12- Distilled after 13, final residue is the cetyl benzenesulfonic acid sodium reclaimed, and the tri-n-butylamine that distillation condensation obtains circulates To spray column.Its concrete technology flow process is as shown in Figure 2.
Embodiment 4:The recovery method of nonionic emulsifier in agricultural chemicals waste water
The technique waste water containing a large amount of emulsifying agents is often produced in the production of agriculture chemicals, in these waste water containing anion and it is non-from The emulsifying agent of son.
By the ceramic membrane containing 0.5% Tween 80 emulsifying agent agricultural chemicals technique waste water by 20nm apertures, after processing Clear water can be discharged directly, if COD height can continue to go to biochemical treatment system.The content of surfactant rises in concentrated water 3.0%。
Waste water after concentration is pumped into agitator tank, and it is fully mixed using measuring pump to be pumped into the isoamyl alcohol of wastewater volume 25% After conjunction, mixture is transferred to standing tank, and the temperature for keeping standing tank is 40 DEG C, 10h is stood in tank is stood makes mixture complete After full layering, upper organic phase is transferred in alembic, is evaporated under reduced pressure below 100 DEG C, and purged using nitrogen, by gas Pure Organic Alcohol is completed to remove, and the alcohol of removing is recycled to solvent tank.Lower floor's recovery returns to earthenware slab film group, will wherein organic matter Concentrate, its recovery process are as shown in Figure 3.
Embodiment 5:The recovery method of Coal Gas Washing Cycling Water nonionic emulsifier
Containing 3.5% tetradecyl alchohol APEO -10 in waste water, waste water is pumped into agitator tank, and is pumped into using measuring pump useless After the ethyl acetate of water volume 25% is sufficiently mixed, mixture is transferred to standing tank, and the temperature for keeping standing tank is 20 DEG C, After standing 10h makes mixture be layered completely in standing tank, upper organic phase is transferred in alembic, steamed below 80 DEG C Evaporate, and purged using nitrogen, the pure ester of gas is completed to remove, the ester of removing is recycled to solvent tank.Lower floor's aqueous phase returns to ceramic flat Plate film group, will wherein organic matter concentrate, the surfactant solution after concentrate is recycled to blending tank, and the clear water after film process is direct Discharge, it is as shown in Figure 4 for its recovery process.
Embodiment 6:The recovery method of Coal Gas Washing Cycling Water cationic emulsifier
Contain 5.0% cetyl trimethylammonium bromide in waste water, waste water is pumped into agitator tank, and be pumped into using measuring pump useless N-butanol of the water volume 20% containing 2.0% tartaric acid, mixture is transferred to standing tank, and keeps adjusting its pH as 8.0 standing temperature Spend for 20 DEG C, after 10h is stood in standing tank and mixture is layered completely, upper organic phase is transferred in alembic, at 80 DEG C Distilled, and purged using nitrogen below, alcohol is completed to remove, the alcohol of recovery is recycled to solvent tank.Live on remaining surface Property agent add a large amount of hydrobromic acids, reclaim surfactant.By lower floor's aqueous phase after flashing dealcoholysis, by containing macroreticular weakly base tree In fat adsorption tower, the COD and ammonia nitrogen of the clear water of discharge are up to standard directly to be discharged, and have after tower packing saturation to be adsorbed using front end Solvent elutes, and eluent, which enters, stands tank, and its recovery process is as shown in Figure 5.
Embodiment 7:The recovery of levelling agent in dyeing waste water
Often need to be by the use of the nonionic surfactant of OP and NP series as levelling agent, to ensure the uniform of dyeing in dyeing process Degree.
By taking the dyeing waste water containing 0.5% OP-10 emulsifying agents as an example, the waste water is pumped into mixing and stirring tank, adds ammonia Base be modified XAD-4 resins be(Polystyrene resin)Addition is waste water 2kg per ton, and Protein Separation is pumped into after fully dispersed Device, the flow velocity by adjusting waste water and gas make particulate be flowed out together by foam completely.
Waste water after processing is through analysis, wherein without surfactant, but CODcrIt is still higher, it can complete to reach through biochemical treatment Mark discharge.Upper foam is sprayed into spray column using n-butanol, and filtrate enters standing tank after filtering for lower end, and passes through The temperature that heating keeps standing tank is 40 DEG C, and after 10h is stood in standing tank and mixture is layered completely, upper organic phase is turned Enter in alembic, be evaporated under reduced pressure below 100 DEG C, and purged using nitrogen, the pure Organic Alcohol of gas is completed to remove, removing Alcohol is recycled to solvent tank, reclaims surfactant.After the aqueous phase flash distillation dealcoholysis of lower floor, it is recycled in mixing and stirring tank, its Specific technological process is as shown in Figure 2.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this Among the right of invention.

Claims (10)

1. the recovery process of surfactant in waste water, it is characterised in that comprise the following steps:
(1)Flotation material is added into the mixing and stirring tank equipped with surface active agent wastewater, after stirring, will be contained described floating The waste water of material selection is pumped into airfloat equipment, flotation material is discharged with foam by bubbling, after foam fraction factor, removes surface The water of activating agent is discharged from airfloat equipment bottom, after testing its CODCrArranged outside after being down to 10 ~ 40mg/L;
Wherein, for the mass percentage concentration of surfactant below 1.0%, the dosage of the flotation material is 1 in the waste water ~ 10kg/ tons;
When the surfactant is anion surfactant, the flotation material of addition is the positively charged particulate in surface;
When the surfactant is cationic surfactant, the flotation material of addition is the negatively charged particulate in surface;
When the surfactant is nonionic surfactant, the flotation material of addition is that can form hydrogen bond and be complexed micro- Grain;
The use of with liquid volume ratio in foam is 0.1 ~ 1 in the foam outlet of airfloat equipment:1 organic solvent is to isolating Foam carries out spray elution, and the liquid filtering after elution, for recovery flotation material to recycle, filtrate pump enters to stand liquid separation tank In, stand 2 ~ 12h and be layered;
Or the earthenware slab membrane filtration by waste water by 20 ~ 100nm, filtrate are pumped into mixing and stirring tank, and add and filtrate body Product is than being 0.1 ~ 1:1 organic solvent, it is pumped into and is stood in liquid separation tank after stirring, stands 2 ~ 12h and be layered;
Or the adsorption tower for laying waste water by modified resin, after removing surfactant therein, entered using organic solvent Row elution, eluent, which is pumped into, to be stood in liquid separation tank, is stood 2 ~ 12h and is layered;
(2)Aqueous phase after layering is pumped into flash vessel, evaporative condenser, which reclaims organic solvent therein and is recycled to, stands liquid separation tank In, remove the aqueous phase after organic solvent and be recycled in mixing and stirring tank, or the aqueous phase after removal organic solvent is passed through into modification The adsorption tower of resin laying, after removing surfactant therein, is eluted, eluent is recycled to using the organic solvent Stand in liquid separation tank;
Or the earthenware slab membrane filtration by the aqueous phase after layering by 20 ~ 100nm, the water after filtering are arranged outside, filtrate cycle is extremely In mixing and stirring tank;
(3)Organic phase after layering is pumped into distiller, evaporates and condenses recovery organic solvent to recycle, it is remaining to be To reclaim obtained surfactant.
2. the recovery process of surfactant in waste water according to claim 1, it is characterised in that when surface is lived in waste water Property agent mass percentage concentration be more than 1.0% when, recycling step is as follows:
(a)It is 0.1 ~ 1 first to add with wastewater volume ratio:1 organic solvent, standing is pumped into after being stirred in mixing and stirring tank In liquid separation tank, stand 2 ~ 12h and be layered;
(b)Water layer after layering is pumped into flash vessel, and evaporative condenser reclaims organic solvent therein and is recycled to and stands in liquid separation tank, Remove the water layer after organic solvent to be recycled in mixing and stirring tank, according to described step(1)、(2)With(3)Handled;
Or the adsorption tower for laying the water layer after above-mentioned removal organic solvent by modified resin, remove surface-active therein After agent, eluted using the organic solvent, eluent is recycled to step(a)Stand in liquid separation tank;
Or the earthenware slab membrane filtration by the water layer after layering by 20 ~ 100nm, the water after filtering are arranged outside, filtrate cycle is extremely Step(a)In mixing and stirring tank;
(c)Organic layer after layering is pumped into evaporator, is evaporated and is condensed recovery organic solvent to recycle, remaining to be The surfactant of recovery.
3. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that the anion Surfactant is alkylsurfuric acid salt, alkyl benzene sulphonate sodium salt, fatty alcohol sulphuric acid salt, fatty acid salt, alkylbenzene first Barbiturates, alkyl phosphoric acid salt, fatty alcohol polyoxyethylene ether sulfate class, AEO phosphoric acid salt or alkyl amber Amber acid ester sulfonates class.
4. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that the positively charged The particulate of lotus is silica, aluminum oxide, titanium oxide, ferroso-ferric oxide, di-iron trioxide, calcium carbonate, magnesium hydroxide, magnetic iron ore Powder, ground hematite, gypsum miberal powder, feldspar miberal powder or quartzy miberal powder, and the pH value for adjusting waste water is less than the isoelectric point of the particulate, Make the particulate positively charged;It is either cation organic resin particulate or is that surface grafting has consolidating for quaternary ammonium salt Huo quaternary alkylphosphonium salts Body particulate.
5. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that the cation Surfactant is DTAB, tridecyl trimethylammonium bromide, TTAB, ten Six alkyl trimethyl ammonium bromides, Cetyltrimethylammonium bromide, TBAB, DTAC, ten Trialkyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, hexadecyltrimethylammonium chloride, octadecyl trimethyl chlorine Change ammonium, tetrabutylammonium chloride, TBAB, to octyl phenyl trimethylammonium bromide or to octyl phenyl trimethyl bromination Ammonium.
6. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that described negatively charged The particulate of lotus is silica, aluminum oxide, titanium oxide, ferroso-ferric oxide, di-iron trioxide, calcium carbonate, magnesium hydroxide, magnetic iron ore Powder, ground hematite, gypsum miberal powder, feldspar miberal powder or quartzy miberal powder, and the pH value for adjusting waste water is higher than the isoelectric point of the particulate, Make the particulate negatively charged;It is either anion organic resin particulate or is that surface grafting has carboxyl, sulfonic group or phosphate Resin particle.
7. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that the nonionic Surfactant is fatty alcohol polyethenoxy ether class, APES class, polyoxyethylene carboxylate class, fatty acid methyl Ester ethoxylate, expoxy propane and ethylene oxide copolymer, alkylolamides class or arlacels.
8. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that it is described being capable of shape Particulate into hydrogen bond is silica, aluminum oxide, titanium oxide, ferroso-ferric oxide, di-iron trioxide, calcium carbonate, magnesium hydroxide, magnetic Iron Ore Powder, ground hematite, gypsum miberal powder, feldspar miberal powder or quartzy miberal powder, and microparticle surfaces cladding inertia organic resin, After silica, then in surface grafting amino, hydroxyl or sulfydryl.
9. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that step(1)Middle institute When to state surfactant be nonionic surfactant, sorbing material in the adsorption tower is amino or carboxy-modified porous Polystyrene resin, either for amino modified phenolic resin or be amino modified melamine resin;
When the surfactant is cationic surfactant, the sorbing material in the adsorption tower gathers for sulfonic group modified Styrene, either for sulfonic group modified phenolic resin or be sulfonic group modified melamine resin;
When the surfactant is anion surfactant, the sorbing material in the adsorption tower is amino modified polyphenyl Ethene, either for amino modified phenolic resin or be amino modified melamine resin, the pH value of regulation waste water is low during use In the isoelectric point of the resin.
10. the recovery process of surfactant in waste water according to claim 1 or 2, it is characterised in that step(1)In For nonionic surfactant, the organic solvent is n-butanol, 2- butanol, dimethyl butyrate alcohol, n-amyl alcohol, 2- amylalcohols, different Amylalcohol, cyclopentanol, 2- methylcyclopentanols, n-hexyl alcohol, cyclohexanol, 2- hexanols, 2- methyl anyl alcohols, n-heptanol, enanthol, just pungent Alcohol, isooctanol, tripropyl amine (TPA), tri-isopropyl amine, tri-n-butylamine, triisobutylamine, triamylamine, trihexylamine, tricyclohexyltin amine, methyl formate, first Acetoacetic ester, propyl formate, isopropyl formate, butyl formate, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, second Acid butyl ester, methyl propionate, ethyl propionate, isopropyl propionate, butyl propionate, dimethyl ether, ether, propyl ether, butyl ether, dichloromethane, One or both of chloroform, dichloroethanes, vinyl chloride, dichloroethylene mix;
For anion surfactant, the organic solvent is:A kind of corresponding to above-mentioned Composed of Non-ionic Surfactant or In two kinds of solvents, tripropyl amine (TPA), tri-isopropyl amine, tri-n-butylamine, tri-n-butylamine, triisobutylamine, triamylamine, trihexylamine or three rings are added Hexylamine, and solvent pH is adjusted as acidity;
For cationic surfactant, the organic solvent is:A kind of corresponding to above-mentioned Composed of Non-ionic Surfactant or In two kinds of solvents, citric acid, tartaric acid, malic acid or gluconic acid are added, and adjusts solvent pH as alkalescence.
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CN110436661A (en) * 2019-07-11 2019-11-12 湖南锦佳环保科技有限公司 A kind of method and apparatus removing surfactant in water removal using foam enrichment
CN111233234A (en) * 2020-01-16 2020-06-05 广东丽臣奥威实业有限公司 Recovery process of surfactant in wastewater and application of recovered liquid
CN111620485A (en) * 2020-06-17 2020-09-04 河北铭万精细化工有限公司 Wastewater recycling process
CN111763575A (en) * 2020-06-19 2020-10-13 武汉工程大学 Detergent composition not resistant to calcium and magnesium ions
CN111995168A (en) * 2020-07-09 2020-11-27 广州浪奇日用品有限公司 Recycling process of daily chemical wastewater
CN113145086A (en) * 2021-05-19 2021-07-23 万华化学集团股份有限公司 Fatty acid modified adsorption resin, preparation method and method for treating anionic surfactant wastewater by using same
CN113877402A (en) * 2021-11-02 2022-01-04 福建龙净环保股份有限公司 Wet desulphurization process system and wet desulphurization process method with ultralow wastewater discharge

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CN109678221A (en) * 2018-12-03 2019-04-26 广州正利金属表面处理剂有限公司 A kind of synergist and its preparation method and application for the sewage treatment of nonionic surfactant containing high concentration
CN110436661A (en) * 2019-07-11 2019-11-12 湖南锦佳环保科技有限公司 A kind of method and apparatus removing surfactant in water removal using foam enrichment
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CN111233234B (en) * 2020-01-16 2022-03-22 广东丽臣奥威实业有限公司 Recovery process of surfactant in wastewater
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CN111763575A (en) * 2020-06-19 2020-10-13 武汉工程大学 Detergent composition not resistant to calcium and magnesium ions
CN111995168A (en) * 2020-07-09 2020-11-27 广州浪奇日用品有限公司 Recycling process of daily chemical wastewater
CN113145086A (en) * 2021-05-19 2021-07-23 万华化学集团股份有限公司 Fatty acid modified adsorption resin, preparation method and method for treating anionic surfactant wastewater by using same
CN113877402A (en) * 2021-11-02 2022-01-04 福建龙净环保股份有限公司 Wet desulphurization process system and wet desulphurization process method with ultralow wastewater discharge
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Application publication date: 20180406