CN106242102A - A kind of method for purifying treatment of industrial effluent - Google Patents
A kind of method for purifying treatment of industrial effluent Download PDFInfo
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- CN106242102A CN106242102A CN201610251131.6A CN201610251131A CN106242102A CN 106242102 A CN106242102 A CN 106242102A CN 201610251131 A CN201610251131 A CN 201610251131A CN 106242102 A CN106242102 A CN 106242102A
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- 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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- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
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- C08B11/10—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C02F2101/20—Heavy metals or heavy metal compounds
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The present invention relates to Water warfare field, disclose a kind of method for purifying treatment of industrial effluent, comprise the following steps: 1) industrial wastewater is stood, and remove particulate contamination by filter screen；2) industrial wastewater after step 1) processes is loaded in foam separating tower carries out bubbling process, and separate bubble foam layer, take off a layer industrial wastewater；3) by through step 2) process after industrial wastewater be passed through oil-water separation tower in carry out oil-water separation；Described oil-water separation tower uses composite aerogel as filler.The inventive method is high to the adsorption efficiency of greasy dirt, heavy metal, it is not necessary to reclaims cleanser, and water body will not be caused secondary pollution.
Description
Technical field
The present invention relates to Water warfare field, particularly relate to a kind of method for purifying treatment of industrial effluent.
Background technology
Along with the fast development of China's economy, at present, industrial water consumption is all in cumulative year after year, and the wastewater flow rate discharged therewith is also being continuously increased.In these waste water, the most all contain the objectionable impurities such as greasy dirt, heavy metal ion.In order to protect day by day destroyed environment, before these industrial wastewaters are discharged, it is necessary to carry out purified treatment.Existing industrial waste water purifying method mainly has flocculence, physisorphtion, microbial degradation method etc..Wherein the application of flocculence is relatively broad.
As the Chinese patent of Application No. 201310388675.3 discloses the processing method of a kind of heavy metal containing sewage, including: heavy metal containing sewage is introduced in sewage reaction tank by (a)；B () adds appropriate ion sedimentation agent in heavy metal containing sewage and settles；C () heavy metal containing sewage after sedimentation adds appropriate flocculant and carries out efficient flocculating；D () heavy metal containing sewage after adding flocculant adds appropriate flocculation aid；E () will add the heavy metal containing sewage quiescent setting certain time after flocculation aid；F flocculation group after precipitation is separated from heavy metal containing sewage by ().This invented technology flow process is simple, and medicament stock is easy to get, with low cost, and processing procedure does not produce new " three wastes ", obvious processing effect.
As the Chinese patent of Application No. 201310366271.4 discloses a kind of oily water water scavengine agent and preparation method thereof, this oily water cleanser in terms of mass parts containing following component: aluminium polychlorid 15～30 parts, PAMA 5～12 parts, Calx 7～16 parts, sodium hypochlorite 3～10 parts, sodium lignin sulfonate 3～8 parts, diammonium phosphate 3～7 parts, benzene sulfonic acid sodium salt 5～15 parts.The industrial waste water purifying agent that this invention provides has the strongest flocculation, and has good bactericidal effect.
Coagulant is processed as the Chinese patent of Application No. 201410380852.8 discloses a kind of condensed oil sewage, include following components in percentage by weight: 15.0～the aluminium polychlorid of 25.0%, 5.0～the poly-silicon zinc sulfate of 10.0%, 0.5～the PDDA of 1.0% and 5.0～the 3.0G polyamide-amide of 10.0%.Its preparation method is: by weight percentage, first aluminium polychlorid and poly-silicon zinc sulfate are added to the water, add PDDA and 3.0G polyamide-amide after dissolving completely, stir, regulation pH value, to 3.0～5.0, obtains thick Industrial Wastewater Treatment coagulant.Its advantage is: consumption is few, cheap, and is applicable to the process technique of multifunctional rotary flow reactor；Have rp demulsification and water purification effect concurrently, Heavy Oil High Temperature sewage is had good clean-up effect；Its preparation method is simple.
Although greasy dirt, heavy metal ion etc. can be removed from water by method above by flocculence purified industrial waste water to a certain extent, but its detersive efficiency is relatively low, and after flocculation, flocculent substance the most easily remains in water body；And need when purifying to add in water and various be dissolved in water itself and the chemical reagent that is not easily recycled, while decontamination, easily cause secondary pollution.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of to greasy dirt, heavy metal adsorption efficiency height, it is not necessary to cleanser is reclaimed, and water body will not be caused the method for purifying treatment of industrial effluent of secondary pollution.
The concrete technical scheme of the present invention is: a kind of method for purifying treatment of industrial effluent, comprises the following steps:
1) industrial wastewater is stood, and remove particulate contamination by filter screen.
First industrial wastewater stood, filter；On the one hand particulate contamination can be removed to purify water, on the other hand removing of particulate contamination the foam separation in subsequent step and oil-water separation can be conducive to: if there being the existence of a large amount of granule foreign in foam separation, the foaming characteristic of industrial wastewater can be affected, thus cause cannot the emulsifying agent in industrial wastewater being separated；And in oil-water separation, if industrial wastewater exists a large amount of granule foreign, filler can be resulted in blockage, not only affect the oil absorbing effect of filler, and the permeability of filler can be reduced, cause water speed to reduce.
2) industrial wastewater after step 1) processes is loaded in foam separating tower carries out bubbling process, and separate bubble foam layer, take off a layer industrial wastewater.
Owing to industrial wastewater usually containing the most various emulsifying agents, these emulsifying agents with surface activity exist for a long time with in water body, industrial wastewater is made to define relatively stable oil-in-water emulsion, if the filler in the most practical oil-water separation tower carries out oil suction to it, due to profit one, adsorption efficiency is relatively low.In order to solve this technical problem, the present invention is after removing particulate contamination to industrial wastewater, then it is carried out foam separation.Owing to emulsifying agent has the strongest surface activity, after liquid produces bubble, emulsifying agent can concentrate on gas-liquid interface (foam surface), if foam is collected, it is possible to effectively reduce the content of emulsifying agent in industrial wastewater, thus the emulsifiability of industrial wastewater is substantially reduced, oil-in-water system is disintegrated, oil phase is separated from the water, finally re-uses filler and industrial wastewater is carried out oil suction, and purification efficiency is largely increased.
3) by through step 2) process after industrial wastewater be passed through oil-water separation tower in carry out oil-water separation；Described oil-water separation tower uses composite aerogel as filler.
Carry out oil-water separation to removing the industrial wastewater after emulsifying agent, owing to oil-water separation degree is high, utilize the method for physical absorption to carry out oil suction, not only water body will not be caused secondary pollution, and good purification, efficiency is high.And above-mentioned composite aerogel heavy metal ion also has the strongest absorbability.
The preparation process of described composite aerogel includes: butyl titanate, CNT, brucite fiber, carboxylated nano-crystal cellulose, dehydrated alcohol, toluene 1:0.1-0.2:0.1-0.2:0.2-0.4:10-30:0.01-0.03 are in mass ratio mixed, obtained solution A；The glacial acetic acid of dehydrated alcohol, 0.5-1.5mol/L is mixed with water 10-20:4-6:1 in mass ratio, obtained solution B；Solution A is carried out supersonic oscillations process at 50-60 DEG C, solution B is added drop-wise in the solution A of 2 times of quality；Sol solutions is prepared after stirring 1-2h；By the most aging for sol solutions 24-48h, then in sol solutions, add dehydrated alcohol carry out solvent displacement 24-48h, in sol solutions, add normal hexane the most again carry out solvent displacement 24-48h, it is separated off normal hexane, obtain wet gel, with the mixed solution of organo-silicon compound Yu normal hexane, wet gel is carried out hydrophobically modified；Eventually pass dried prepared composite aerogel.
Aeroge is the material that the density that finds the most in the world is minimum, and has the porosity of superelevation, wherein being most widely used of aerosil.The preparation process of aeroge is generally divided into colloidal sol and prepares, gel preparation and drying steps.After prepared gel, containing a large amount of holes and three-dimensional net structure in gel, under gel state, owing to there being the filling of liquid to support, its structure is relatively stable.But during gel drying is aeroge, due to the loss of liquid, and the frame strength of gel is the highest, easily caves in, it is not easy to shape, after causing becoming aeroge, its porosity declines.
Composite aerogel prepared by the present invention, use CNT, brucite fiber, carboxylated nano-crystal celluloses etc. are as matrix material, CNT is the tubular material of nano-scale, brucite fiber also has nano-scale, carboxylated nano-crystal cellulose is nano-scale crystal fibre element, after above-mentioned material and titanium dioxide carry out being combined, three-dimensional net structure can be played a supporting role under gel state, can be cross-linked with each other between carboxylated nano-crystal cellulose, in dry run, its structure is not caved in, ensure that porosity, and CNT, brucite fiber all has heat-resisting quantity, in dry run, stability is strong, after being prepared as composite aerogel simultaneously, the intensity of aeroge can be significantly increased.In addition, owing to CNT self also has hollow structure, after compound with titanium dioxide, the network-like cross-linked structure of complexity can be formed, can't too much reduce the porosity of composite aerogel, and owing to the hole of CNT is specific to self structure, be not that the later stage is by crosslinking gained, therefore stability is higher, and intensity is higher.
Carboxylated nano-crystal cellulose is in addition to above-mentioned effect, owing to the oil absorption of aeroge is stronger, although degree of also being able to heavy metal is adsorbed, but ability is more weak.And containing plurality of heavy metal in industrial wastewater.Carboxylated nano-crystal cellulose has excellent heavy metal adsorption, it is possible to the shortcoming of reinforcement aeroge.
Owing to common aerogel material is to have the most hydrophilic, can not play a role very well when accordingly acting as oil absorption material, therefore the present invention has carried out hydrophobically modified to aerogel composite, it is possible to increase efficiency of deoiling.
After composite aerogel filler oil suction reaches saturation, owing to titanium dioxide has efficient photocatalytic, only composite aerogel filler need to be carried out ultraviolet light irradiation, it becomes possible to oil is degraded.
Further, in step 2) when carrying out bubbling, the bottom of foam separating tower is carried out air-blowing, from the collected overhead foam of foam separating tower；Wherein, corresponding to the water of every cubic metre, air-blowing speed is 20-40L/min.Carrying out foam separation with this understanding, bubble is effective, and separating degree is higher.
Further, in step 2) when carrying out bubbling, industrial wastewater water temperature is 25-35 DEG C, in foam separating tower, the loading height of industrial wastewater and the internal diameter of foam separating tower are than for 10-20:1.Carrying out foam separation with this understanding, bubble is effective, and separating degree is higher.
Further, in step 3), industrial wastewater flow velocity in the filler that the every square metre cross-section of oil-water separation tower is long-pending is 800-1200L/min.
Further, described carboxylated nano-crystal cellulose preparation method is: be that 0.5-1.5mol/L ammonium persulfate solution mixes by the microcrystalline Cellulose of 1 weight portion and 40-45 weight portion concentration, after dipping 10-20min, mixed solution is carried out ultrasonic agitation and processes 25-35min, obtain suspension, wherein ultrasonic frequency is 45-55KHz, and temperature is 45-55 DEG C；It is centrifuged described suspension processing, and the solids obtained is washed till neutrality, it is to dissolve in 1mol/L citric acid solution that solids is added to 30-40 weight portion concentration, and under the conditions of above-mentioned ultrasonic agitation, react 150-200min, again to product after being centrifuged, wash, dissolve, dialysing, prepare carboxylated nano-crystal cellulose.
The carboxylated nano-crystal cellulose that said method prepares has preferable bridging property, and the high adsorption capacity of heavy metal.
Further, during preparing composite aerogel, when solution A being added drop-wise in solution B, in solution A, add the sodium bicarbonate of 0.02-0.03 times that quality is solution A simultaneously.The effect of sodium bicarbonate is as toluene, it is as porogen, but both pore principles are different, cooperate the different types of hole that can make, therefore containing the hole of three kinds of different origins in this composite aerogel: the hole that hole that aeroge is cross-linked to form, the tubulus of CNT self, porogen are made, these three pore-size differs, therefore, it is possible to form difference in size alienation, for different greasy dirts, respective adsorption efficiency is the most different, therefore, it is possible to improve the overall oil absorbing effect of composite aerogel.
Further, described CNT, brucite fiber are respectively through activation processing: CNT or brucite fiber be impregnated in the 10wt% hydrochloric acid solution of 150-250 times of quality, and carry out water-bath vibration 1-2h at a temperature of 50-60 DEG C；After CNT or brucite fiber are taken out and cleaned, at a temperature of 400-500 DEG C, calcine 2-5h.CNT after overactivation, brucite fiber not only have higher intensity, and CNT has more preferable adsorption activity.The particle diameter of described CNT is 400-800nm.
Further, solution B is to the rate of addition 0.5-1.5mL/s of solution A.Need the strict rate of addition controlling solution B, form colloidal sol under this speed and can form the network-like structure of high-crosslinking-degree, on the premise of ensureing porosity, improve intensity.
Further, during hydrophobically modified, described organo-silicon compound are with the mixed solution of normal hexane, and organo-silicon compound are 1-2:5 with the volume ratio of normal hexane, and organo-silicon compound are 100:10-20 with the mixed solution of normal hexane and the mass ratio of wet gel；Modification temperature is 50-60 DEG C, modification time 36-50h.
Further, described organo-silicon compound are selected from hexamethyl disiloxane, hexamethyldisiloxane, HMDS, MTMS, trim,ethylchlorosilane.
It is compared with the prior art, the invention has the beneficial effects as follows: the inventive method efficiency of deoiling is high, it is not necessary to reclaims cleanser, and water body will not be caused secondary pollution.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
A kind of method for purifying treatment of industrial effluent, comprises the following steps:
1) industrial wastewater is stood, and remove particulate contamination by filter screen.
2) industrial wastewater after step 1) processes is loaded in foam separating tower, the bottom of foam separating tower is carried out air-blowing, from the top separation foam of foam separating tower, take off a layer industrial wastewater.Wherein, corresponding to the water of every cubic metre, air-blowing speed is 30L/min.Industrial wastewater water temperature is 30 DEG C, and in foam separating tower, the loading height of industrial wastewater and the internal diameter of foam separating tower are than for 15:1.
3) by through step 2) process after industrial wastewater be passed through oil-water separation tower in carry out oil-water separation.Described oil-water separation tower uses composite aerogel as filler.Wherein, industrial wastewater flow velocity in the filler that the every square metre cross-section of oil-water separation tower is long-pending is 1000L/min.
The preparation process of described composite aerogel includes:
The preparation of carboxylated nano-crystal cellulose: be the mixing of 1mol/L ammonium persulfate solution by the microcrystalline Cellulose of 1 weight portion and 42.5 weight portion concentration, after dipping 15min, mixed solution is carried out ultrasonic agitation and processes 30min, obtain suspension, wherein ultrasonic frequency is 50KHz, and temperature is 50 DEG C；It is centrifuged described suspension processing, and the solids obtained is washed till neutrality, it is to dissolve in 1mol/L citric acid solution that solids is added to 35 weight portion concentration, and under the conditions of above-mentioned ultrasonic agitation, react 175min, again to product after being centrifuged, wash, dissolve, dialysing, prepare carboxylated nano-crystal cellulose.
Butyl titanate, CNT, brucite fiber, carboxylated nano-crystal cellulose, dehydrated alcohol, toluene 1:0.15:0.15:0.3:20:0.02 in mass ratio are mixed, obtained solution A；The glacial acetic acid of dehydrated alcohol, 1mol/L is mixed with water 15:5:1 in mass ratio, obtained solution B；Solution A is carried out supersonic oscillations process at 55 DEG C, solution B is added drop-wise in the solution A of 2 times of quality with the speed of 1mL/s；In solution A, add the sodium bicarbonate of 0.025 times that quality is solution A simultaneously, after stirring 1.5h, prepare sol solutions.The particle diameter of described CNT is 400-800nm
By the most aging for sol solutions 36h, in sol solutions, then add dehydrated alcohol carry out solvent displacement 36h, in sol solutions, add normal hexane the most again carry out solvent displacement 36h, be separated off normal hexane, obtain wet gel.With the mixed solution of organo-silicon compound Yu normal hexane, wet gel is carried out hydrophobically modified, in the mixed solution of described organo-silicon compound and normal hexane, organo-silicon compound are 1.5:5 with the volume ratio of normal hexane, and organo-silicon compound are 100:15 with the mixed solution of normal hexane and the mass ratio of wet gel；Modification temperature is 55 DEG C, modification time 43h.Described organo-silicon compound are hexamethyl disiloxane.
Eventually pass dried prepared composite aerogel.
Embodiment 2
A kind of method for purifying treatment of industrial effluent, comprises the following steps:
1) industrial wastewater is stood, and remove particulate contamination by filter screen.
2) industrial wastewater after step 1) processes is loaded in foam separating tower, the bottom of foam separating tower is carried out air-blowing, from the top separation foam of foam separating tower, take off a layer industrial wastewater.Wherein, corresponding to the water of every cubic metre, air-blowing speed is 20L/min.Industrial wastewater water temperature is 25 DEG C, and in foam separating tower, the loading height of industrial wastewater and the internal diameter of foam separating tower are than for 10:1.
3) by through step 2) process after industrial wastewater be passed through oil-water separation tower in carry out oil-water separation.Described oil-water separation tower uses composite aerogel as filler.Wherein, industrial wastewater flow velocity in the filler that the every square metre cross-section of oil-water separation tower is long-pending is 800L/min.
The preparation process of described composite aerogel includes:
The preparation of carboxylated nano-crystal cellulose: be 0. mol/L ammonium persulfate solution mixing by the microcrystalline Cellulose of 1 weight portion and 40 weight portion concentration, after dipping 10min, mixed solution is carried out ultrasonic agitation and processes 25min, obtain suspension, wherein ultrasonic frequency is 45KHz, and temperature is 55 DEG C；It is centrifuged described suspension processing, and the solids obtained is washed till neutrality, it is to dissolve in 1mol/L citric acid solution that solids is added to 30 weight portion concentration, and under the conditions of above-mentioned ultrasonic agitation, react 150min, again to product after being centrifuged, wash, dissolve, dialysing, prepare carboxylated nano-crystal cellulose.
CNT, brucite fiber be impregnated in respectively in the 10wt% hydrochloric acid solution of 200 times of quality, and at a temperature of 55 DEG C, carry out water-bath vibration 1.5h；After CNT, brucite fiber being taken out respectively and cleaning, at a temperature of 450 DEG C, calcine 3.5h.The particle diameter of described CNT is 400-800nm
Butyl titanate, CNT, brucite fiber, carboxylated nano-crystal cellulose, dehydrated alcohol, toluene 1:0.1:0.1:0.2:10:0.01 in mass ratio are mixed, obtained solution A；The glacial acetic acid of dehydrated alcohol, 0.5mol/L is mixed with water 10:4:1 in mass ratio, obtained solution B；Solution A is carried out supersonic oscillations process at 50 DEG C, solution B is added drop-wise in the solution A of 2 times of quality with the speed of 0.5mL/s；In solution A, add the sodium bicarbonate of 0.02 times that quality is solution A simultaneously, after stirring 1h, prepare sol solutions.
By the most aging for sol solutions 24h, in sol solutions, then add dehydrated alcohol carry out solvent displacement 24h, in sol solutions, add normal hexane the most again carry out solvent displacement 24h, be separated off normal hexane, obtain wet gel.With the mixed solution of organo-silicon compound Yu normal hexane, wet gel is carried out hydrophobically modified, in the mixed solution of described organo-silicon compound and normal hexane, organo-silicon compound are 1:5 with the volume ratio of normal hexane, and organo-silicon compound are 100:10 with the mixed solution of normal hexane and the mass ratio of wet gel；Modification temperature is 50 DEG C, modification time 50h.Described organo-silicon compound are hexamethyldisiloxane.
Eventually pass dried prepared composite aerogel.
Embodiment 3
A kind of method for purifying treatment of industrial effluent, comprises the following steps:
1) industrial wastewater is stood, and remove particulate contamination by filter screen.
2) industrial wastewater after step 1) processes is loaded in foam separating tower, the bottom of foam separating tower is carried out air-blowing, from the top separation foam of foam separating tower, take off a layer industrial wastewater.Wherein, corresponding to the water of every cubic metre, air-blowing speed is 40L/min.Industrial wastewater water temperature is 35 DEG C, and in foam separating tower, the loading height of industrial wastewater and the internal diameter of foam separating tower are than for 20:1.
3) by through step 2) process after industrial wastewater be passed through oil-water separation tower in carry out oil-water separation.Described oil-water separation tower uses composite aerogel as filler.Wherein, industrial wastewater flow velocity in the filler that the every square metre cross-section of oil-water separation tower is long-pending is 1200L/min.
The preparation process of described composite aerogel includes:
The preparation of carboxylated nano-crystal cellulose: be the mixing of 1.5mol/L ammonium persulfate solution by the microcrystalline Cellulose of 1 weight portion and 45 weight portion concentration, after dipping 20min, mixed solution is carried out ultrasonic agitation and processes 35min, obtain suspension, wherein ultrasonic frequency is 55KHz, and temperature is 45 DEG C；It is centrifuged described suspension processing, and the solids obtained is washed till neutrality, it is to dissolve in 1mol/L citric acid solution that solids is added to 40 weight portion concentration, and under the conditions of above-mentioned ultrasonic agitation, react 200min, again to product after being centrifuged, wash, dissolve, dialysing, prepare carboxylated nano-crystal cellulose.
CNT, brucite fiber be impregnated in respectively in the 10wt% hydrochloric acid solution of 250 times of quality, and at a temperature of 60 DEG C, carry out water-bath vibration 1h；After CNT, brucite fiber being taken out respectively and cleaning, at a temperature of 500 DEG C, calcine 2h.The particle diameter of described CNT is 400-800nm
Butyl titanate, CNT, brucite fiber, carboxylated nano-crystal cellulose, dehydrated alcohol, toluene 1:0.2:0.2:0.4:30:0.03 in mass ratio are mixed, obtained solution A；The glacial acetic acid of dehydrated alcohol, 1.5mol/L is mixed with water 20:6:1 in mass ratio, obtained solution B；Solution A is carried out supersonic oscillations process at 60 DEG C, solution B is added drop-wise in the solution A of 2 times of quality with the speed of 1.5mL/s；In solution A, add the sodium bicarbonate of 0.03 times that quality is solution A simultaneously, after stirring 2h, prepare sol solutions.
By the most aging for sol solutions 48h, in sol solutions, then add dehydrated alcohol carry out solvent displacement 48h, in sol solutions, add normal hexane the most again carry out solvent displacement 48h, be separated off normal hexane, obtain wet gel.With the mixed solution of organo-silicon compound Yu normal hexane, wet gel is carried out hydrophobically modified, in the mixed solution of described organo-silicon compound and normal hexane, organo-silicon compound are 2:5 with the volume ratio of normal hexane, and organo-silicon compound are 100:20 with the mixed solution of normal hexane and the mass ratio of wet gel；Modification temperature is 60 DEG C, modification time 36h.Described organo-silicon compound are MTMS.
Eventually pass dried prepared composite aerogel.
The composite aerogel filler that embodiment 1-3 prepares, its porosity can reach 92-95%, and specific surface area reaches 500-600 m2/ g, density reaches 3.5-4.2kg/m3.After described in embodiment 1-3, industrial wastewater is purified by method, after purification, water quality oil content can control within 2.8mg/L, and heavy metal ionic adsorption rate can reach more than 90%.
Raw materials used, equipment in the present invention, unless otherwise noted, is the conventional raw material of this area, equipment；Method therefor in the present invention, unless otherwise noted, is the conventional method of this area.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the present invention, every any simple modification, change and equivalent transformation made above example according to the technology of the present invention essence, all still falls within the protection domain of technical solution of the present invention.
Claims (10)
1. a method for purifying treatment of industrial effluent, it is characterised in that comprise the following steps:
1) industrial wastewater is stood, and remove particulate contamination by filter screen；
2) industrial wastewater after step 1) processes is loaded in foam separating tower carries out bubbling process, and separate bubble foam layer, take off a layer industrial wastewater；
3) by through step 2) process after industrial wastewater be passed through oil-water separation tower in carry out oil-water separation；Described oil-water separation tower uses composite aerogel as filler；
The preparation process of described composite aerogel includes: butyl titanate, CNT, brucite fiber, carboxylated nano-crystal cellulose, dehydrated alcohol, toluene 1:0.1-0.2:0.1-0.2:0.2-0.4:10-30:0.01-0.03 are in mass ratio mixed, obtained solution A；The glacial acetic acid of dehydrated alcohol, 0.5-1.5mol/L is mixed with water 10-20:4-6:1 in mass ratio, obtained solution B；Solution A is carried out supersonic oscillations process at 50-60 DEG C, solution B is added drop-wise in the solution A of 2 times of quality；Sol solutions is prepared after stirring 1-2h；By the most aging for sol solutions 24-48h, then in sol solutions, add dehydrated alcohol carry out solvent displacement 24-48h, in sol solutions, add normal hexane the most again carry out solvent displacement 24-48h, it is separated off normal hexane, obtain wet gel, with the mixed solution of organo-silicon compound Yu normal hexane, wet gel is carried out hydrophobically modified；Eventually pass dried prepared composite aerogel.
2. method for purifying treatment of industrial effluent as claimed in claim 1 a kind of, it is characterised in that in step 2) when carrying out bubbling, the bottom of foam separating tower is carried out air-blowing, from the collected overhead foam of foam separating tower；Wherein, corresponding to the water of every cubic metre, air-blowing speed is 20-40L/min.
3. method for purifying treatment of industrial effluent as claimed in claim 2 a kind of, it is characterised in that in step 2) when carrying out bubbling, industrial wastewater water temperature is 25-35 DEG C, in foam separating tower, the loading height of industrial wastewater and the internal diameter of foam separating tower ratio is for 10-20:1.
4. a kind of method for purifying treatment of industrial effluent as claimed in claim 1, it is characterised in that in step 3), industrial wastewater flow velocity in the filler that the every square metre cross-section of oil-water separation tower is long-pending is 800-1200L/min.
5. a kind of method for purifying treatment of industrial effluent as claimed in claim 1, it is characterized in that, described carboxylated nano-crystal cellulose preparation method is: be that 0.5-1.5mol/L ammonium persulfate solution mixes by the microcrystalline Cellulose of 1 weight portion and 40-45 weight portion concentration, after dipping 10-20min, mixed solution is carried out ultrasonic agitation and processes 25-35min, obtaining suspension, wherein ultrasonic frequency is 45-55KHz, and temperature is 45-55 DEG C；It is centrifuged described suspension processing, and the solids obtained is washed till neutrality, it is to dissolve in 1mol/L citric acid solution that solids is added to 30-40 weight portion concentration, and under the conditions of above-mentioned ultrasonic agitation, react 150-200min, again to product after being centrifuged, wash, dissolve, dialysing, prepare carboxylated nano-crystal cellulose.
6. a kind of method for purifying treatment of industrial effluent as claimed in claim 1, it is characterised in that during preparing composite aerogel, when solution A being added drop-wise in solution B, adds the sodium bicarbonate of 0.02-0.03 times that quality is solution A in solution A simultaneously.
7. a kind of method for purifying treatment of industrial effluent as claimed in claim 1, it is characterized in that, described CNT, brucite fiber are respectively through activation processing: CNT or brucite fiber be impregnated in the 10wt% hydrochloric acid solution of 150-250 times of quality, and carry out water-bath vibration 1-2h at a temperature of 50-60 DEG C；After CNT or brucite fiber are taken out and cleaned, at a temperature of 400-500 DEG C, calcine 2-5h；The particle diameter of described CNT is 400-800nm.
8. a kind of method for purifying treatment of industrial effluent as claimed in claim 1, it is characterised in that solution B is to the rate of addition 0.5-1.5mL/s of solution A.
9. a kind of method for purifying treatment of industrial effluent as claimed in claim 1, it is characterized in that, during hydrophobically modified, in the mixed solution of described organo-silicon compound and normal hexane, organo-silicon compound are 1-2:5 with the volume ratio of normal hexane, and organo-silicon compound are 100:10-20 with the mixed solution of normal hexane and the mass ratio of wet gel；Modification temperature is 50-60 DEG C, modification time 36-50h.
10. a kind of method for purifying treatment of industrial effluent as described in claim 1 or 9, it is characterised in that described organo-silicon compound are selected from hexamethyl disiloxane, hexamethyldisiloxane, HMDS, MTMS, trim,ethylchlorosilane.
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Application publication date: 20161221 |