CN103922499A - Cyclone enhanced extraction method for heavy metal ions in waste water, and device thereof - Google Patents
Cyclone enhanced extraction method for heavy metal ions in waste water, and device thereof Download PDFInfo
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Abstract
The invention relates to a cyclone enhanced extraction method for heavy metal ions in waste water, and a device thereof. The method comprises cyclone emulsion, mixed extraction, cyclone separation and coalescence depth separation and the like, a method for efficiently extracting heavy metal ions and fast deeply separating an extractant is formed by performing cyclone mixing and separation and combining gravity sedimentation and coalescence separation aiming at heavy metal containing waste water, the technology has the advantages that the extraction separation is short in time and high in efficiency, the extractant in purified water can be thoroughly removed by adopting a combination separation technology of pre-separation and depth separation, and the purity of the purified water and the recovery rate of the extractant can be guaranteed. The device is less in occupied area, less in the usage amount of the extractant, low in operation and maintenance cost, makes up for the deficiency of secondary pollution introduced by the traditional extraction and separation, can achieve the green and environment-friendly requirements, and can be widely applied in the field of waste water treatment.
Description
Technical field
The present invention relates to energy-conserving and environment-protective field, the method that relates to eddy flow strengthening extraction, cyclonic separation and the coarse separation of heavy metal ion in a kind of extraction wastewater, take ion liquid abstraction heavy metal ion as prototype, and definite saying relates to a kind of extraction agent extraction and removes the method and apparatus of cyclone emulsification, hybrid extraction, cyclonic separation and the coalescent degree of depth separation of heavy metal in waste water.
Background technology
Heavy metal ion wide material sources, relate to the industries such as chemical industry, mine, machinofacture, metallurgy, electronics and instrument.Heavy metal contamination has disguise, chronicity and the feature such as irreversible, both can directly enter water body, atmosphere and soil, causes direct pollution, also can migration mutually in various environment, cause indirect pollution.Heavy metal can not can only carry out the mutual conversion between form by microbiological deterioration in environment, makes directly or indirectly human body permanent poisoning, causes various diseases even carcinogenic.Therefore the discharge of controlling heavy metal ion is very urgent.The method of removing at present heavy metal ions in wastewater comprises chemical precipitation, ion-exchange, biofloculation, evaporation concentration, solvent extraction etc., but most of technology and equipment cost is high, and efficiency is low, complicated operation, subsequent disposal difficulty.Wherein liquid liquid solvent extraction is easy to the advantages such as operate continuously successfully for the recovery of heavy metal in waste water owing to having the simple strong adaptability good separating effect of the low investment skinny device of energy consumption, but traditional organic extractant, owing to having certain mutual solubility and the large strong toxicity of volatility with water, can cause secondary pollution to environment.For overcoming the shortcoming of traditional extraction separation, some investigators attempt removal and the recovery for heavy metal ions in wastewater by the ionic liquid of functionalization recently, and in laboratory, having obtained good effect, based on take, the industrial application of hydrophobic type imidazole type functional ion liquid cupric ion in extraction agent extraction wastewater is background to the application just.There is not yet at present the report of the industrial applications of ion liquid abstraction heavy metal in waste water both at home and abroad, research work rests on laboratory stage always, the application's treasury gets, separated, reclaim and be circulated in one, a kind of feasible industrializing implementation technique and device are provided.
Chinese patent application CN201310556596, contriver Xu Xiao etc., disclose a kind of eddy flow enhancement method that uses solid particulate sorbent material absorbing heavy metal ions in water, related to the method and apparatus of solid phase adsorption heavy metal ion, eddy flow strengthening absorption, cyclonic separation.The application is different from it is for liquid-phase extraction agent and has increased coalescent degree of depth separating unit.Chinese patent application CN201410013074, contriver Zhang Jian, a kind of heterogeneous mixed solution modularization of petrochemical complex profit two-phase high efficiency separation equipment that is applied to is disclosed, its internals are by rectification section, coarse, strengthen settlement separate, the several parts of nanofiber coarse separation form, guidance through patent applicant, the application's degree of depth coarse separation unit has adopted the principle similar to it, but this unit and its contrast, Application Areas is different, the different in kind of separated phase, the selection of coalescence material is different and do not need to reclaim circulation, therefore at the device of this segment unit, arrange and have very big-difference.
Summary of the invention
In order to overcome the deficiency that extraction agent consumption in traditional liquid-liquid solvent extraction is large, introduce secondary pollution, the application's treasury gets, separated, reclaim and be circulated in one, a kind of eddy flow extraction of heavy metal ions in wastewater and method and the device of extraction agent degree of depth separation are provided.
Concrete technical scheme is:
A heavy metal ions in wastewater eddy flow strengthening extraction method, comprises the following steps:
Step 1: containing the waste water of heavy metal ion and organic extractant respectively via power unit separately, press certain pressure and flow proportional, be introduced into the swirl-flow premixed extraction cells of closing, be subject to described swirl-flow premixed emulsification mixing effect of closing rotational-flow shearing power in extraction cells, then enter helical static hybrid extraction unit, by internal helicoid element in described helical static hybrid extraction unit, cut, shear, shunt, rotate and again converge, organic extractant emulsification, good distribution are mixed and the described heavy metal of abundant extraction;
; in this step; the effect extraction agent that is subject to rotational-flow shearing power due to high speed rotating will be emulsified into small droplets to be become disperse phase and is scattered in waste water and extracting heavy metal ions; swirl-flow premixed effect of closing extraction cells is emulsification, pre-mixing, extraction; mixed stream enters helical static hybrid extraction unit afterwards; be subject to cutting, shearing, shunting, the rotation of internal helicoid element and again converge, thereby reaching extraction agent emulsification, good distribution mixing, the abundant object extracting;
Step 2: the mixing liquid in step 1 after extraction enters eddy flow extracting and separating unit is carried out the sharp separation of reextraction and immiscible two-phase in described eddy flow extracting and separating unit; Two be separated after, the organic phase that the proportion that contains extraction agent is greater than water flows out and reclaims from underflow opening, purifies water from overflow port outlet unit;
; in this step; after extraction, liquid enters eddy flow extracting and separating unit; the centrifugal field of utilizing different densities, immiscible two-phase to produce in the rotation of swirler high speed at this element reaches separated object with eddy flow field; high flow rate rotation has emulsification, dispersion and separated effect simultaneously; can complete into the sepn process of reextraction and extraction agent and water, extraction agent proportion is greater than water so extraction agent reclaims from underflow, purifies waste water from overflow outlet unit.
It is separated that described purification water and extraction agent in described organic phase carry out the degree of depth as follows:
The described purification water penetration depth coarse separation clean unit flowing out from overflow port, the efficient corrugated plate coarse separation section of flowing through respectively and oleophylic fiber degree of depth coarse separation section, make a small amount of extraction agent degree of depth separation of carrying secretly in described purification water, the water that obtains again purifying;
The above-mentioned principle again purifying is: overflow liquid is with the extraction agent penetration depth coarse separation clean unit of a small amount of nominal particle size, liquid distributor is set entrance so that flow field fluid stable, then flow through respectively efficient corrugated plate coalescing separator and degree of depth fiber coalescing separator of fluid, efficient corrugated plate coalescing separator selects surface to have the perforate waved plate material of oleophilic drainage character, " shallow pool principle " and " coalescence technology " effectively combined, when oil-containing, (organic extractant is lipophilicity, when abbreviation oil) waste water is by coalescent sheetpile, the tortuous passageway of waved plate forces current to form the fluidised form of near sinusoidal ripple, thereby the probability of collision between increase oil droplet, impel the coalescent of little oil droplet.The surface properties of coalescence material and plate group structure are the keys that affects separation efficiency, the coalescence mechanism of waved plate is " wetting coalescent " and " collision coalescence ", the separated process of the heavy collection of oil droplet is so substantially: because waved plate is oleophylic, therefore first on waved plate surface, form one deck oil film, continuous process along with current, oil film is thickeied gradually, form a certain size oil droplet by oil surface tension after, be subject to the gravity of oil droplet own and impulsive force that oil droplet is come off, with current, through trough place, heavy oilhole sinks.Moreover because waved plate is corrugated, flow to and constantly change, increasing probability of collision makes little oil droplet become large, according to Stocks formula, square being directly proportional of oil droplet settling velocity and oil bead diameter, and large oil droplet specific surface area relative the diminishing of surface tension with water that diminish, has therefore accelerated oil droplet sedimentation, has reached the object of oily water separation.Degree of depth fiber coalescing separator is worked out by different oleophylics or hydrophilic several filamentary material, main coalescence mechanism is " collision coalescence ", the coalescent bed that fibrous material forms, its space all forms mutual consecutive passage, and just as without the very little staggered microtubule of several diameters, but oily(waste)water is when flow through bed, two or more oil droplets can collide with tube wall or collision mutually simultaneously, its momentum, by making their synthetic larger oil droplets, is grown up thereby reach gradually, finally completes separation;
The described organic phase penetration depth coarse separation recovery unit flowing out from underflow opening that contains a large amount of extraction agents, extraction agent after separation is recycled by collector, water after separation returns to heavy metal-containing waste water power unit entrance, again in access to plant, circulates, until after saturated; Efficient corrugated plate coarse separation section in described degree of depth coarse separation recovery unit is not directly communicated with oleophylic fiber coarse separation section.
Because underflow liquid contains a large amount of extraction agent penetration depth coarse separation recovery units, the separation principle of recovery unit is identical with clean unit, in coalescence material, oil droplet is through holding back, coalescent, migration completes separated with the coarse process discharging, different efficient corrugated plate coarse separation sections in this element are to separate with degree of depth fiber coarse separation section, because underflow oleaginousness is too large, therefore adopts and separate separated method to facilitate the recovery of extraction agent, first through the most organic reagent of efficient corrugated plate coalescing section, can separate, collector through bottom enters extraction agent tank recovery circulation, then the liquid penetration depth fiber coarse separation section that contains a small amount of oil is carried out degree of depth separation, extraction agent after separation is recycled by collector, water after separation and heavy metal-containing waste water together enter power unit, again in access to plant, circulate.
Organic extractant described in step 1 is 0.1～5% with the volume flow ratio that contains the waste water of heavy metal ion, and heavy metal ions in wastewater concentration is 0.1～1000ppm.
Extraction agent and heavy metal-containing waste water are in eddy flow extracting and separating unit, and the effect that the rotation of process high flow rate has emulsification, dispersion completes reextraction; Rely on different densities, immiscible two-phase to rotate the centrifugal field of generation and the sharp separation process that eddy flow field completes extraction agent and waste water in swirler high speed, the described underflow opening extraction agent rate of recovery is 90～99%, and operation pressure drop is 0.1～0.2MPa.
The bleed-off fluid penetration depth coarse separation clean unit of eddy flow extracting and separating unit, the efficient corrugated plate coarse separation section of flowing through successively and degree of depth fiber coarse separation section, this element effectively combines " shallow pool principle " and " coalescence technology ", (extraction agent lipophilicity is called for short oil to oil droplet in coalescence material, lower same) through holding back, coalescent, migration completes separated with the coarse process discharging, by the optimization to the selection of coalescence material and material structure, can oil droplet more than particle diameter 1 μ m is completely separated, the oil-contg that this unit exports in purifying waste water can reach below 5ppm.
The described water again purifying flows out from the water out of described degree of depth coarse separation clean unit, enters secondary-cleaned unit; Described secondary-cleaned unit is selected from membrane filtration tripping device, porous adsorption separation device or magnetic separating device, thoroughly to remove the organic extractant in purifying waste water, after assurance extracting and separating, without the introducing of extraction agent, reaches environment protection requirement.
Realize the device of above-mentioned either method, described device comprises swirl-flow premixed extraction cells, helical static hybrid extraction unit, eddy flow extracting and separating unit, degree of depth coarse separation recovery unit, the degree of depth coarse separation clean unit of closing;
Wherein, the described swirl-flow premixed extraction cells of closing comprises two symmetrical water-ins and two symmetrical extraction agent entrances, emulsification hybrid extraction chamber and axial vent pipes, containing the waste water of heavy metal ion and extraction agent, with certain pressure and throughput ratio, by tangential entry separately, entered in described emulsification hybrid extraction chamber and carried out preliminary emulsification mixing and extraction, after mixing, liquid escapes and enter and the described swirl-flow premixed described helical static hybrid extraction unit that extraction cells is connected that closes by axial vent pipe;
Described helical static hybrid extraction unit is comprised of the flight of turning round to alternately changing, and at this, completes the further emulsification hybrid extraction work of extraction agent;
Described eddy flow extracting and separating unit is hydrocyclones for liquid and liquid separation, be provided with two symmetrical entrances, in order to discharge separated after waste water overflow port and in order to discharge the underflow opening of the extraction agent after separation;
Described degree of depth coarse separation clean unit comprises the cylindrical shell of efficient corrugated plate coarse separation section and degree of depth fiber coarse separation Duan Liangduan UNICOM, the entrance of described degree of depth coarse separation clean unit is provided with liquid distributor so that fluid flow fields is stable, outlet is provided with extraction agent collector, facilitates extraction agent to assemble and reclaims;
Described degree of depth coarse separation recovery unit comprises efficient corrugated plate coarse separation section and degree of depth fiber coarse separation section, and these two segregation sections are not directly communicated with; Two segregation sections are provided with liquid distributor, in outlet, are provided with extraction agent collector at its entrance respectively; Fluid is first through efficient corrugated plate coarse separation section herein, and the waste water after separation enters degree of depth fiber coarse separation section herein again.
Described device also comprises secondary-cleaned unit, and this unit is selected from membrane filtration tripping device, porous adsorption separation device or magnetic separating device, and secondary-cleaned is carried out in purifying waste water that degree of depth coarse separation clean unit is flowed out.
Described hydrocyclones for liquid and liquid separation is two inlets entrance, is single or a plurality of being arranged in parallel.
Described degree of depth coarse separation recovery unit also comprises coalescence material, and described extraction agent collector is respectively equipped with liquidometer.
Preferably, described extraction agent is 1～2% with the wastewater volume throughput ratio containing heavy metal ion, and heavy metal ions in wastewater concentration is 0.1～200ppm, and the extraction efficiency of cupric ion is 97～99%
Preferably, described eddy flow extracting and separating unit, the underflow extraction agent rate of recovery of this element of process optimization design can reach 98%.
Preferably, in described extracting and separating unit, rely on centrifugal field and eddy flow field to complete the separated of extraction agent, intake pressure is 0.10～0.30MPa.
Preferably; described degree of depth coarse separation clean unit; in this element fluid flow through successively efficient corrugated plate coarse separation section and degree of depth fiber coarse separation section; this element effectively combines " shallow pool principle " and " coalescence technology "; in coalescence material oil droplet through holding back, coalescent, migration completes separated by selecting the optimization of suitable coalescence material and material structure with the coarse process discharging; can oil droplet more than particle diameter 1 μ m is completely separated, the oil-contg that this unit exports in purifying waste water can reach below 5ppm.
Beneficial effect of the present invention is: first extraction and separation method that the present invention adopts are to utilize swirl-flow premixed emulsification, mixing and the abundant extraction to heavy metal ion that extraction and the rotation of helical static hybrid extraction unit generation and the flow field of variation complete extraction agent of closing; Then the centrifugal field producing by eddy flow extracting and separating unit and eddy flow field carry out reextraction and rapidly and efficiently separated to mixed solution; Utilize afterwards degree of depth coarse separation clean unit to carry out degree of depth coarse separation to overflow liquid, the extraction agent after separation carries out recycle and reuse by collector, and purifying waste water after separation enters secondary-cleaned unit and carry out further purifying treatment; Utilize degree of depth coarse separation recovery unit to carry out two-part separation to underflow liquid, the extraction agent after separation carries out recycle and reuse by collector, and the water after separation and heavy metal-containing waste water together enter power unit and again in access to plant, circulate; Whether secondary-cleaned unit can, according to concrete environmental requirement, be selected to need and reach higher environmental requirement by mode single or combination.
In the method for the invention, swirl-flow premixedly close extraction cells and helical static hybrid extraction unit and there is quick emulsification, evenly mix, the abundant feature of extraction, without special emulsification and extraction machine; Eddy flow extracting and separating unit has reextraction and separated feature rapidly and efficiently; Degree of depth coarse separation unit can complete the degree of depth separation of the extraction agent in micro-particulate footpath, makes the recovery cycle efficiency of extraction agent high, has avoided the introducing of secondary pollution; These equipment are all static equipment, therefore the method have advantages of that treatment capacity is large, work long-term stability and energy-saving and environment friendly, and operation of equipment is simple, floor space is little, overcome extraction agent consumption in traditional extraction partition method large and introduce the problem of secondary pollution, can be widely used in the wastewater treatment process that contains heavy metal ion.
Accompanying drawing explanation
Fig. 1 is device and the treatment scheme schematic diagram thereof of embodiment 1;
Fig. 2 is the swirl-flow premixed structural representation that closes extraction cells, and wherein (a) is one-piece construction schematic diagram, is (b) that A is to diagrammatic cross-section;
Fig. 3 is the structural representation of eddy flow extracting and separating unit, wherein, (a) is one-piece construction schematic diagram, is (b) that A is to diagrammatic cross-section;
Fig. 4 is the structural representation of degree of depth coarse separation clean unit;
Fig. 5 is the separation principle figure of efficient corrugated plate coarse separation section;
Fig. 6 is the separation principle figure of degree of depth fiber coarse separation section.
Nomenclature:
1 power unit; The 2 swirl-flow premixed extraction cells of closing; 21 symmetrical tangential water inlets;
22 symmetrical tangential extraction agent entrances; 23 emulsification hybrid extraction chambeies;
24 axial vent pipes; 3 helical static hybrid extraction unit; 4 eddy flow extracting and separating unit;
41 symmetrical tangential entries; 42 upflow tubes; 43 underflow outlets;
5 degree of depth coarse separation clean units; 51 waterwater entrances; 52 liquid distributors;
53 efficient corrugated plate coarse separation sections; 54 degree of depth fiber coarse separation sections; 55 treated water outlets;
56 extraction agent collectors are also provided with liquidometer; 6 secondary-cleaned unit; 7 degree of depth coarse separation recovery units.
Embodiment
Below in conjunction with embodiment, further illustrate content of the present invention, but these embodiment do not limit the scope of the invention.
Affecting extraction agent extraction, to catch the factor of efficiency of heavy metal ion a lot, such as the concentration of cupric ion in the content of inorganic salt in the ratio of extraction agent emulsification degree, emulsion degree of mixing, extraction agent and the waste water in waste water, extraction time, extraction temperature, pH value of solution, solution, solution etc., the drop that generally believes extraction agent emulsification is less, what it mixed with waste water is more abundant, and effect of extracting is better.Contriver is studied the effect of extracting of contents of many kinds of heavy metal ion under different extraction conditionss in multiple different ionic liquid by experiment, and obtained the extraction efficiency under various conditions, for convenience of the existing cupric ion (concentration range 0.1～200ppm) of take in functional ionic liquids [HMPSM] [PF6] extraction solution of narration, be example brief description.
In research solution, copper ion concentration obtains the impact of percentage extraction, and the starting point concentration of cupric ion is very little on the impact of percentage extraction, and during lower than 4ppm, percentage extraction is 95～97%, and during higher than 10ppm, percentage extraction is more than 99%.Research emulsification degree of mixing and extraction time obtain the impact of percentage extraction, under ultrasonic mixing, mix the tight 10s percentage extraction of contact and just reach 80%, it is slow that after 60s, percentage extraction maintains 98% rising, because industrial application treatment capacity is large and require operate continuously, inconvenience adopts ultrasonic mixing, by comparing and studying the inventor and find, under certain pressure, waste water and extraction agent enter the swirl-flow premixed extraction cells of closing simultaneously, due to structure design, fluid can produce high speed rotating, under the effect of rotational-flow shearing power extraction agent will be emulsified into small droplets become disperse phase be scattered in waste water in and extracting heavy metal ions, swirl-flow premixed effect of closing extraction cells is emulsification, pre-mixing, extraction, mixed stream enters helical static hybrid extraction unit afterwards, be subject to the cutting of internal helicoid element, shear, shunting, rotate and again converge, thereby reach extraction agent emulsification, good distribution is mixed, the object fully extracting.Therefore, the inventor adopts these two kinds of units in series to reach the object of fully taking.
The impact of research two-phase volume comparison percentage extraction obtains, when the volume ratio of solution phase and ionic liquid phase is less than 70, the percentage extraction of cupric ion is substantially constant between 97～99%, volume ratio percentage extraction when being greater than 70 reduces gradually, consider the various uncertain factors of actual industrial, thus the present invention to adopt the volume ratio of extraction agent and waste water be 50:1.
Research temperature obtains the impact of percentage extraction, and the percentage extraction between 20～65 ℃ all approaches 100%, shows substantially not vary with temperature; Inorganic salt are obtained the research of the impact of percentage extraction, and making copper ion solution saltiness is the NaCl of massfraction 1～5%, and research finds that percentage extraction all approaches 100%, show salinity on percentage extraction substantially without affecting; Research pH value obtains the impact of percentage extraction, and the percentage extraction of the solution that pH is 1～12 all approaches 100%, shows that extraction process is not subject to the impact of pH value.
By the research to coalescence material, contriver finds, the lipophilicity perforate waved plate of suitable material and structure has efficient coalescent effect to ionic liquid and by orthogonal test, has found out material type and the shuffling ratio of the coalescent fiber coalescence material of applicable different ionic liquid, and found by experiment suitable fluid velocity, i.e. maximum throughput under the prerequisite that guarantees separating effect.
Applicant, based on above research, has designed following examples.
Embodiment 1
Refer to Fig. 1, device and the treatment scheme schematic diagram thereof of the present embodiment, this device at least comprises power unit 1, the swirl-flow premixed extraction cells 2 of closing, helical static hybrid extraction unit 3, eddy flow extracting and separating unit 4, degree of depth coarse separation clean unit 5, degree of depth coarse separation recovery unit 7, secondary-cleaned unit 6, power unit 1 provides certain kinetic energy for entering swirl-flow premixed liquid phase of closing extraction cells 2, make its follow-up pressure, flow and linear velocity reach necessary requirement, by swirl-flow premixed extraction cells 2 and the helical static hybrid extraction unit 3 of closing, realize extraction agent heavy metal ion is fully extracted, by eddy flow extracting and separating unit 4, realize the efficient sharp separation of reextraction and the rear extraction agent of extraction and water, by degree of depth coarse separation clean unit 5, realize overflow water purification and the recovery to extraction agent, the coalescent recovery realizing underflow extraction agent by degree of depth coarse separation recovery unit 7, by secondary-cleaned unit 6, realize the secondary-cleaned of purifying waste water, wherein secondary-cleaned unit 6 can optionally be used membrane filtration separated, the devices such as porous fractionation by adsorption or magnetic separation method.
Further, enter swirl-flow premixedly while closing extraction cells 2, the inlet pressure of a little higher than waste water of inlet pressure of extraction agent, to guarantee the smooth injection of extraction agent.
Further, while entering eddy flow extracting and separating unit 4, inlet pressure will be not less than 0.1MPa, to guarantee the speed of rotation of cyclonic separation necessity.
Further, in degree of depth coarse separation clean unit 5 and degree of depth coarse separation recovery unit, 7 cylinder section flow rate of liquid is 0.005～0.01m/s, to guarantee the effect of coarse separation.
Refer to Fig. 2, it is the swirl-flow premixed structural representation that closes extraction cells, this unit comprises the axial vent pipe 24 of two symmetrical tangential water inlets 21 and two symmetrical tangential extraction agent entrances 22, emulsification hybrid extraction chamber 23 and suitable depth of penetration, extraction agent and water are entered in emulsification hybrid extraction chamber 23 and are produced high speed rotating by tangential inlet separately, after emulsification hybrid extraction, by axial vent pipe 24, are discharged.
Refer to Fig. 3, it is the structural representation of eddy flow extracting and separating unit 4, this unit comprises hydrocyclones for liquid and liquid separation, is provided with two symmetrical tangential entries 41 and with waste water, the underflow of discharging after separation, exports 43 to discharge the extraction agent after separation to accept outlet mixed solution, the overflow port (upflow tube 42) of aforementioned hybrid extraction unit.
Refer to Fig. 4, it is the structural representation of degree of depth coarse separation clean unit 5, this unit comprises accepting the waterwater entrance 51, the liquid distributor 52 in order to steady flow condition fluidised form, efficient corrugated plate coarse separation section 53, degree of depth fiber coarse separation section 54 of overflowing liquid, in order to discharge the treated water outlet 55 of purifying waste water, the extraction agent collector 56 that is provided with liquidometer, utilize liquidometer observable to collect the liquid level of extraction liquid; The structure of degree of depth coarse separation recovery unit 7 is similar with it, no longer narration.
Referring to Fig. 5 and Fig. 6, is respectively the separation principle figure of efficient corrugated plate coarse separation section 53 and the separation principle figure of degree of depth fiber coarse separation section 54, comprises hydrophobicity and hydrophilic fiber coarse separation schematic diagram.
Utilize said apparatus to carry out the eddy flow extraction of heavy metal ions in wastewater and the method for extraction agent degree of depth separation, comprise the following steps: heavy metal-containing waste water (conventionally heavy metal ion content 0.1～200ppm) and extraction agent provide certain pressure (be not less than 0.2MPa) and enter the swirl-flow premixed extraction cells of closing with the throughput ratio of 50:1 through power unit (as pump) separately respectively, enter afterwards helical static hybrid extraction unit and complete abundant mixing and extraction at this; The efficient sharp separation that mixed solution enters eddy flow extracting and separating unit and completes reextraction and extraction agent and water at this with the pressure of 0.1～0.3MPa afterwards, the treatment capacity of general single cyclone pipe is 0.1～2m3/h; The overflow liquid of eddy flow extracting and separating unit and underflow liquid is penetration depth coarse separation clean unit and degree of depth coarse separation recovery unit respectively, the barrel diameter of this Unit two according to liquid within it flow velocity be that 0.005～0.01m/s designs, wherein degree of depth coarse separation clean unit is realized overflow water purification and the recovery to extraction agent, degree of depth coarse separation recovery unit is realized the coalescent recovery to underflow extraction agent, by secondary-cleaned unit, realizes the secondary-cleaned of purifying waste water.
Experimental result demonstration, closes behind extraction cells and helical static hybrid extraction unit through swirl-flow premixed, and the percentage extraction of heavy metal ion reaches 95～98%; The underflow extraction agent rate of recovery of the eddy flow extracting and separating unit of process optimization design can reach 98%; Extraction agent drop after degree of depth coarse separation clean unit more than particle diameter 1 μ m is completely separated, and the oil-contg of its outlet in purifying waste water can reach below 5ppm; More than proved the treatment effect of the method.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, all should be technology category of the present invention.
Claims (9)
1. a heavy metal ions in wastewater eddy flow strengthening extraction method, is characterized in that, comprises the following steps:
Step 1: containing the waste water of heavy metal ion and organic extractant respectively via power unit separately, press certain pressure and flow proportional, be introduced into the swirl-flow premixed extraction cells of closing, be subject to described swirl-flow premixed emulsification mixing effect of closing rotational-flow shearing power in extraction cells, then enter helical static hybrid extraction unit, by internal helicoid element in described helical static hybrid extraction unit, cut, shear, shunt, rotate and again converge, organic extractant emulsification, good distribution are mixed and the described heavy metal of abundant extraction;
Step 2: the mixing liquid in step 1 after extraction enters eddy flow extracting and separating unit is carried out the sharp separation of reextraction and immiscible two-phase in described eddy flow extracting and separating unit; Two be separated after, the organic phase that the proportion that contains extraction agent is greater than water flows out and reclaims from underflow opening, purifies water from overflow port outlet unit.
2. method according to claim 1, is characterized in that, it is separated that described purification water and extraction agent in described organic phase carry out the degree of depth as follows:
The described purification water penetration depth coarse separation clean unit flowing out from overflow port, the efficient corrugated plate coarse separation section of flowing through respectively and oleophylic fiber degree of depth coarse separation section, make a small amount of extraction agent degree of depth separation of carrying secretly in described purification water, the water that obtains again purifying;
The described organic phase penetration depth coarse separation recovery unit flowing out from underflow opening that contains a large amount of extraction agents, extraction agent after separation is recycled by collector, water after separation returns to heavy metal-containing waste water power unit entrance, again in access to plant, circulates, until after saturated; Efficient corrugated plate coarse separation section in described degree of depth coarse separation recovery unit is not directly communicated with oleophylic fiber coarse separation section.
3. method according to claim 1, is characterized in that, organic extractant described in step 1 is 0.1～5% with the volume flow ratio that contains the waste water of heavy metal ion, and heavy metal ions in wastewater concentration is 0.1～1000ppm.
4. method according to claim 1, is characterized in that, the described underflow opening extraction agent rate of recovery is 90～99%, and operation pressure drop is 0.1～0.2MPa.
5. method according to claim 2, is characterized in that, the described water again purifying flows out from the water out of described degree of depth coarse separation clean unit, enters secondary-cleaned unit; Described secondary-cleaned unit is selected from membrane filtration tripping device, porous adsorption separation device or magnetic separating device.
6. a realization is as the device of method as described in arbitrary in claim 1 to 5, it is characterized in that, described device comprises swirl-flow premixed extraction cells, helical static hybrid extraction unit, eddy flow extracting and separating unit, degree of depth coarse separation recovery unit, the degree of depth coarse separation clean unit of closing connecting successively;
Wherein, the described swirl-flow premixed extraction cells of closing comprises two symmetrical water-ins and two symmetrical extraction agent entrances, emulsification hybrid extraction chamber and axial vent pipes, containing the waste water of heavy metal ion and extraction agent, with certain pressure and throughput ratio, by tangential entry separately, entered in described emulsification hybrid extraction chamber and carried out preliminary emulsification mixing and extraction, after mixing, liquid escapes and enter and the described swirl-flow premixed described helical static hybrid extraction unit that extraction cells is connected that closes by axial vent pipe;
Described helical static hybrid extraction unit is comprised of the flight of turning round to alternately changing, and at this, completes the further emulsification hybrid extraction work of extraction agent;
Described eddy flow extracting and separating unit is hydrocyclones for liquid and liquid separation, be provided with two symmetrical entrances, in order to discharge separated after waste water overflow port and in order to discharge the underflow opening of the extraction agent after separation;
Described degree of depth coarse separation clean unit comprises the cylindrical shell of efficient corrugated plate coarse separation section and degree of depth fiber coarse separation Duan Liangduan UNICOM, the entrance of described degree of depth coarse separation clean unit is provided with liquid distributor so that fluid flow fields is stable, outlet is provided with extraction agent collector, facilitates extraction agent to assemble and reclaims;
Described degree of depth coarse separation recovery unit comprises efficient corrugated plate coarse separation section and degree of depth fiber coarse separation section, and these two segregation sections are not directly communicated with; Two segregation sections are provided with liquid distributor, in outlet, are provided with extraction agent collector at its entrance respectively; Fluid is first through efficient corrugated plate coarse separation section herein, and the waste water after separation enters degree of depth fiber coarse separation section herein again.
7. device according to claim 6, it is characterized in that, described device also comprises secondary-cleaned unit, and this unit is selected from membrane filtration tripping device, porous adsorption separation device or magnetic separating device, and secondary-cleaned is carried out in purifying waste water that degree of depth coarse separation clean unit is flowed out.
8. device according to claim 6, is characterized in that, described hydrocyclones for liquid and liquid separation is two inlets entrance, is single or a plurality of being arranged in parallel.
9. device according to claim 6, is characterized in that, described degree of depth coarse separation recovery unit also comprises coalescence material, and described extraction agent collector is respectively equipped with liquidometer.
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| CN201410175459.5A CN103922499B (en) | 2014-04-29 | 2014-04-29 | A kind of heavy metal ions in wastewater eddy flow strengthening extraction method and device thereof |
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| CN104961219A (en) * | 2015-06-16 | 2015-10-07 | 华东理工大学 | Continuous feeding and pre-mixing method and device for heavy metal wastewater treatment equipment |
| CN105016949A (en) * | 2015-07-29 | 2015-11-04 | 上海米素环保科技有限公司 | Method and device for deep methanol removal from C4 |
| CN108070716A (en) * | 2016-11-15 | 2018-05-25 | 江苏凯力克钴业股份有限公司 | A kind of device that water phase is removed from load organic phases |
| CN108704672A (en) * | 2018-05-31 | 2018-10-26 | 上海华畅环保设备发展有限公司 | Ebullated bed wood tar adds the on-line regeneration method and apparatus of hydrogen decaying catalyst |
| CN108704673A (en) * | 2018-05-31 | 2018-10-26 | 上海华畅环保设备发展有限公司 | Ebullated bed wood tar adds the de-oiling method and device of the outer waste discharge catalyst of hydrogen |
| CN111072187A (en) * | 2020-02-03 | 2020-04-28 | 方军杰 | Sewage treatment equipment |
| CN114177656A (en) * | 2021-12-23 | 2022-03-15 | 安徽国孚凤凰科技有限公司 | Coalescence-separation type decoloring device and method for base oil solvent extraction raffinate |
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| CN108070716A (en) * | 2016-11-15 | 2018-05-25 | 江苏凯力克钴业股份有限公司 | A kind of device that water phase is removed from load organic phases |
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| CN108704672A (en) * | 2018-05-31 | 2018-10-26 | 上海华畅环保设备发展有限公司 | Ebullated bed wood tar adds the on-line regeneration method and apparatus of hydrogen decaying catalyst |
| CN108704673A (en) * | 2018-05-31 | 2018-10-26 | 上海华畅环保设备发展有限公司 | Ebullated bed wood tar adds the de-oiling method and device of the outer waste discharge catalyst of hydrogen |
| CN111072187A (en) * | 2020-02-03 | 2020-04-28 | 方军杰 | Sewage treatment equipment |
| CN114177656A (en) * | 2021-12-23 | 2022-03-15 | 安徽国孚凤凰科技有限公司 | Coalescence-separation type decoloring device and method for base oil solvent extraction raffinate |
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