CN102730804A - A method for purifying water - Google Patents
A method for purifying water Download PDFInfo
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- CN102730804A CN102730804A CN2011100871333A CN201110087133A CN102730804A CN 102730804 A CN102730804 A CN 102730804A CN 2011100871333 A CN2011100871333 A CN 2011100871333A CN 201110087133 A CN201110087133 A CN 201110087133A CN 102730804 A CN102730804 A CN 102730804A
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Abstract
The invention relates to a method for purifying water, comprising the following steps: purifying to-be-purified water that contains silicon dioxide having a first concentration by employing an electric flocculation method at 60 to 100 DEG C to obtain electric flocculation-purified water that contains silicon dioxide having a second concentration that is lower than the first concentration.
Description
Technical field
The present invention relates to a kind of method of purifying waste water, especially relate to a kind of method at high temperature purification water.
Background technology
Natural hot water, as have 60 degrees centigrade pyritous GEOTHERMAL WATER and coal bed methane water at least, usually before use and/or need before the transportation to purify.Industrial processes, as comprise the oil and gas prospect process of SAGD etc., use a considerable amount of water, and produce a large amount of at least 60 degrees centigrade pyritous thermal wastewater.Thermal wastewater also needs to purify before recycle or before the discharging, especially under the under-supply situation of natural water.
Impurity in natural hot water or the thermal wastewater comprises silicon-dioxide (SiO
2), oil, boron and other suspensions, gelationus, dissolved substances.
Existing document relates in room temperature or a little more than the temperature of room temperature makes electricity consumption flocculating and purifying water.For example, WO2010/028097 has disclosed at 120 ° of F (49 ℃) electricity consumption flocculation treatment water with impurity such as minimizing silicon-dioxide.
Yet silicon-dioxide not only exists with colloid but also with solubilized form, and owing to higher silicon-dioxide solubleness in the hot water, at high temperature exist with the dissolved form more in water.Removing dissolved silicon-dioxide through the electricity flocculation is an exothermic process, in hot water, is difficult for carrying out usually.
People such as A.Erdem Yilmaz have delivered one piece of article at Journal of Hazardous Materials (153 (2008) 146-151), are entitled as the electricity consumption flocculation and from GEOTHERMAL WATER, remove boron (Boron removal from geothermal waters by electrocoagulation).Article mentions that working as temperature is raised to 333K (60 ℃) process from 293K (20 ℃), and the energy expenditure when anode surface formation gel causes the electricity flocculation has improved.Because all is to be removed, so silicon-dioxide very likely deposits on electrode according to report silicon-dioxide and boron through chemisorption in the electricity flocculation.Thereby, can rational expectation when making the electricity consumption flocculation remove silicon-dioxide, temperature raises and will cause energy expenditure to increase, and especially also is present in simultaneously under the situation in the water at boron.
In addition, comprise silicon-dioxide, oil (organism) and boron from the thermal wastewater in the SAGD process, existing in the time of these several kinds of materials has more increased the difficulty that purifies.
Summary of the invention
The purpose of this invention is to provide a kind of new method of purifying waste water.
The method that the present invention purifies waste water; Comprise: about 60 degrees centigrade to be lower than about 100 degrees centigrade TR electricity consumption flocculating and purifying contain first concentration silicon-dioxide be cleaned water, thereby obtain to contain the electric flocculating and purifying water of the silicon-dioxide of second concentration that is lower than first concentration.
Embodiment
The present invention includes a plurality of embodiment that relate to a kind of method of purifying waste water.
Approximate term in specification sheets and the claim is used for modifying quantity, and expression the present invention is not limited to this concrete quantity, also comprises the part with the approaching acceptable correction of this quantity, and can not cause the change of relevant basic function.Accordingly, with numerical value such as " pact " or " approximately " modification, mean and the invention is not restricted to this accurate numerical value.In some example, approximate term maybe be corresponding to the precision of the instrument of measuring numerical value.
Mentioned numerical value comprises all numerical value of the unit increase in a unit from low to high among the present invention, supposes any than at least two unit, interval between low value and the high value here.For instance, if mention the quantity of a component or the value of a processing parameter, such as, temperature, pressure; Time or the like is from 1 to 90,20 to 80, or 30 to 70; Be to want to express all clear being set forth in this specification sheets such as 15 to 85,22 to 68,43 to 51,30 to 32 numerical value such as grade.For less than 1 numerical value, 0.0001,0.001,0.01 or 0.1 is considered to a more suitable unit.The aforementioned special example that will express of just hoping, all clearly are listed as in this manual minimum all being regarded as in a similar manner to the combinations of values between the mxm. of enumerating.
The method that the present invention relates to purify waste water; Comprise: about 60 degrees centigrade to be lower than about 100 degrees centigrade TR electricity consumption flocculating and purifying contain first concentration silicon-dioxide be cleaned water, thereby obtain to contain the electric flocculating and purifying water of the silicon-dioxide of second concentration that is lower than first concentration.
Method in the various embodiments of the present invention can be used to purify the hot wastewater that comes from different commercial runs and/or from the high temperature natural water in the underground water removal process.In certain embodiments, be cleaned at least a from oil and gas prospect process, coal bed methane exploration process and the GEOTHERMAL WATER removal process of water.One of oil and gas prospect is exemplified as SAGD.In certain embodiments, the electric TR of carrying out of flocculating is about 80 degrees centigrade to about 90 degrees centigrade.
The silicon-dioxide that is cleaned in the power and water flocculating and purifying water can have various form, for example, and dissolved and gelationus.In addition, consider that electric flocculation process possibly change the form of silicon-dioxide or possibly be more prone to remove the silicon-dioxide of some form, be cleaned silicon-dioxide form in silicon-dioxide and the electric flocculating and purifying water in the water maybe be identical also maybe be different.Similarly, the silicon-dioxide form in the water before and after the additive method that relates among the present invention is handled maybe identical also possibility difference.
Be cleaned and also can contain at least a in heavy metal, boron and the arsenic in the water.The example of heavy metal includes but not limited to aluminium (Al), arsenic (As), beryllium (Be), bismuth (Bi), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), iron (Fe), mercury (Hg), manganese (Mn), molybdenum (Mo), nickel (Ni), plumbous (Pb), plutonium (Pu), tin (Sn), thorium (Th), thallium (Tl), uranium (U), vanadium (V), tungsten (W), zirconium (Zr) and zinc (Zn).
Be cleaned water and also can comprise oil and other organic substances.In certain embodiments, in the COD of electric flocculating and purifying water and the total organic carbon amount at least one ratio to be cleaned water low.
" electricity flocculates " refers to a kind of method or device among the present invention, and voltage puts between negative electrode and the anode therein, in being cleaned water, to produce electric field.Be cleaned water and material wherein as electrolytic solution.In electric flocculation process, thereby be cleaned suspension in the water, emulsification or dissolved pollutent because the chemical reaction that the electrokinetic force that electric current is introduced to be provided drives between ion and the particle is in unsteady state.When reaction is driven, the compound of element or formation will be to stable status development.As a result, this steady state produces the solid that tends to be attached to other solids, colloid, oil (freedom or emulsive) or nonaqueous phase liquid.The electricity flocculation utilizes electric current to promote to be cleaned the removal of impurity in the water.Electricity flocculates the material that again through removing from water like technology such as air supporting, spinning, deposition and filtrations.
If at least one is a sacrificial electrode in negative electrode and the anode, by processing like materials such as steel, iron, aluminium, zinc or magnesium, the ion migration on the electrode is in electrolytic solution and form the metal hydroxides of low solubility.Metal hydroxides is assembled each other and is combined with other materials.Under suitable operational condition, methods such as the power of can relying on for support, air supporting or filtration are removed thereby the material size of these assemblies is grown up.In certain embodiments, the electrode that uses in the electric flocculation process is by at least a processing in iron and the aluminium, thereby the electrochemical reaction of electrode release of ionic is to be Al → Al
3++ 3e
-And/or Fe → Fe
2-+ 2e
-
When using non-sacrificial electrode, for example, electroconductibility synthetic graphite electrode or titanium electrode, the positive ion part that keeping electric flocculation process needs provides by being cleaned water self.The rest part of required positive ion can add like the form of metals ions such as aluminium salt, calcium salt, molysite or magnesium salts.In order to strengthen electronic migration, can be in the electric flocculation process through adding hydrochloric acid (HCl), the sulfuric acid (H of suitable dosage
2SO
4) or phosphoric acid (H
3PO
4Thereby) etc. chemical substance in acid range, operate.Under other situation, the electricity flocculation also can be carried out in alkalescence or neutral environment.
The electricity flocculation possibly used and surpassed two electrodes.In this case, have two kinds of spread patterns, that is, one pole is arranged and bipolar arrangement.One pole is arranged and is referred to that each counter electrode inside interconnects, and not interconnected with other electrodes.All electrodes are directly connected to power supply.For example, the arrangement of four electrodes can for: (+,-,+,-) and the arrangement of six electrodes can for: (+,-,+,-,+,-) etc.This arrangement maybe be also needs a resistance box to regulate the value that current flow and volt ohm-milliammeter read electric current.
Bipolar arrangement refers to has only two monopolar electrodes of outside directly to be connected with power supply, and the interior electrode of between the two other is accepted influence of electric potential between then.Interior electrode is a bipolar electrode, and promptly two parallel surfaces of conducting plates have opposite electric charge respectively.For example, the arrangement of four electrodes can be being arranged as of (+, 0,0,-) and six electrodes: (+, 0,0,0,0,-) etc.
According to the composition that is cleaned impurity in the water that will handle, can in electric flocculation process, use additive if needed.This additive can be by subsequent removal, or in forming precipitation process, participates in chemical reaction.For example, hydrogen peroxide, Fenton reagent (hydrogen peroxide and ferrous iron (Fe
2+) reaction product), chemical oxidizing agents such as permanganate (for example with forms such as potassium permanganate and sodium permanganate add) and ozone can add and be cleaned in the water to carry out chemical oxidation.In addition, when using non-sacrificing cathode and anode, can use additive to form ion and solute and suspended particulates and interact so that the impurity in suspension-s and the solution is flocculated out.When using sacrificing cathode and anode, thereby additive can be used for increasing the electroconductibility promotion electricity flocculation of water.
In certain embodiments, when electricity flocculates, the ionic flocculant of effective dose added and be cleaned in the water.In certain embodiments, after can comprising, ionic flocculant states at least a material: the multipolymer of acrylic amide/quaternized copolymer, Epicholorohydrin and amine, the multipolymer of acrylic amide/allyl group/trialkyl/ammonium; Acrylic amide/diallyl alkylammonium multipolymer; Acrylamide/acrylic acid copolymer and salt thereof, acrylic amide/alkyl acrylic multipolymer, acrylic amide/maleic acid; The acrylic amide maleic acid; The multipolymer of acrylic amide/2-acrylic amide-2-methyl propane sulfonic acid, PEMULEN TR2 and its esters, vinylformic acid/2-acrylic amide-2-methyl propane sulfonic acid multipolymer.
Exemplary cation acrylamide/quaternized copolymer can be represented by chemical formula I:
In Formula I, the mol ratio of repeated structural unit x and y can change from 95: 5 to 5: 95, and mol ratio 60: 40th, present is preferred.R
1And R
2Can be identical or different and be selected from H and CH
3Q is-C (O) O-,-OC (O)-, or-C (O) NH-.R
3Be side chain or linearity (C
1-C
4) alkene.R
4, R
5, and R
6Respectively from H, C
1-C
4Linear branched-chain alkyl, and C
5-C
8Choose in aryl or the alkylaryl.A
-Be from Cl
-, Br
-, HSO
4 -, and MeOSO
3 -In choose.
The example of the y of repeating structure unit is of the back: acrylyl oxy-ethyl-trimethyl salmiac also is called as dimethylaminoethyl alkyl acrylic methyl chloride, corresponding to above-mentioned Formula I, R
1=H, R
2=H, Q are-C (O) O-R
3=Et, R
4, R
5And R
6All be Me, and A
-Be Cl
-Acryloyl-3-(methyl) acrylamide propyl trimethyl ammonium chloride, corresponding aforementioned Formula I, R
1=H, R
2=CH
3, Q is-C (O) NH-R
3=Pr, R
4, R
5And R
6All be Me, and A
-Be Cl
-And acryloyl-2-methylacryoyloxyethyl trimethyl ammonium chloride, corresponding aforementioned Formula I, R
1=H, R
2=CH
3, Q is-C (O) O-R
3Be Et and R
4, R
5And R
6All be Me, and A
-Be Cl
-
An example of cationic copolymer flocculation agent is the acrylic amide/acrylyl oxy-ethyl-trimethyl salmiac multipolymer of 60: 40 mol ratios.This multipolymer can be crosslinked.Its crosslinking degree is less relatively, on 100 moles of repeating unit x and y basis, is about 1x 10
-4% is to about 5x 10
-3%.In addition, non-crosslinked copolymer also possibly be used.Other cationic copolymer flocculation agents comprise acrylic amide/acrylyl oxy-ethyl-trimethyl salmiac multipolymer, and wherein acrylyl oxy-ethyl-trimethyl salmiac exists with the molar percentage of about 10%-50%.
The molecular weight of multipolymer can change in wide region, for example, and 10000 to 20000000.Generally, molecular weight of copolymer surpasses 1,000,000.The cationic copolymer flocculation agent should possess water-soluble or dispersibility.Present way is to use the cationic copolymer flocculation agent with water in oil form.Oil phase can comprise hydrotreated isoparaffin and the naphthenics with low level perfume compound.
Other cationic flocculants comprise Polyglycol 166-450/n n dimetylaniline (multipolymer of Epicholorohydrin and n n dimetylaniline), acrylic amide/allyl group trialkyl ammonium multipolymer, or acrylic amide diallyl dialkyl ammonium multipolymer.These cationic flocculant molecular weight can as from about 10000 to about 20000000 scope.
The anionic flocculant example can be mainly acrylamide copolymer; Like acrylamide/acrylic acid copolymer, acrylic amide alkyl acrylate copolymer, acrylic amide/toxilic acid; Acrylic amide cis-butenedioic anhydride multipolymer, acrylic amide/2-acrylamido-2-methyl propane sulfonic acid.In addition, acrylic acid homopolymer, salt or multipolymer particularly also can be used as anionic flocculant like vinylformic acid/2-acrylamido-2-methyl propane sulfonic acid multipolymer.Another object lesson is the acrylic acid multipolymer that vinylformic acid accounts for about 20 moles of % to 50 mole of %.
Before electric flocculating and purifying, can carry out pre-treatment to being cleaned water.In certain embodiments; Method involved in the present invention also further comprises: before electricity flocculation, use sedimentation, hydrocyclone, air supporting, spinning, pottery or polymeric film, skim floating foam, at least a in filtering of chemical oxidation and cohesion carry out pre-treatment to being cleaned water.
" air supporting " described in the present invention is meant a kind of method or device, and air (or any other suitable gas is like Sweet natural gas, or any gaseous mixture) bubble gets into and is cleaned water and depends on suspended particle therein.The gas-solid miscellany rises to and is cleaned WS and concentrates and be removed.In some embodiments, air supporting can be electric floating method, the air supporting of powered version, and promptly bubble mainly produces through the electrolysis of water.In electric floating process, be not the use air bubble, and use hydrogen and oxygen bubble to combine with suspended matter.
Pottery or polymeric film can be at least a in reverse osmosis membrane, ultra-filtration membrane, microfiltration membrane and the nf membrane.
" chemical oxidation " of the present invention is meant a kind of method or device, wherein chemical oxidizing agent in being cleaned water with pollutant reaction to reach the purpose of purification.The example of chemical oxidizing agent includes but not limited to hydrogen peroxide, Fenton reagent (hydrogen peroxide and ferrous iron (Fe
2+) reaction product), permanganate (for example with forms such as potassium permanganate, sodium permanganate add) and ozone.
Electric flocculating and purifying and with the separating substances that of flocculating after, electric flocculating and purifying water can directly use, transports or discharge, and also can further carry out purifying treatment.
In certain embodiments, the method that the present invention relates to also further comprises: handle electric flocculating and purifying water through the electrooxidation method, purify waste water to obtain electrooxidation.
" electrooxidation " refers to a kind of method or device described in the present invention, and it mainly comprises two kinds: direct oxidation and indirect oxidation.Direct oxidation occurs in anode, and the pollutent that wherein is cleaned in the water discharges electronics to anode.Indirect oxidation be owing to be cleaned the result of powerful oxygenant (like chlorine, hydrogen peroxide and the ozone) effect that adds in the water in the battery.
In certain embodiments, electrooxidation is extremely carried out less than about 100 ℃ TR at about 60 ℃.In certain embodiments, electrooxidation is carried out in about 85 ℃ temperature.In certain embodiments, the electrode that uses in the electro-oxidation process is to be made of titanium.In certain embodiments, the electrode that uses in the electro-oxidation process is to be processed by coated titanium.In certain embodiments, the electrode that uses in the electro-oxidation process is by ruthenium oxide/iridium oxide (RuO
x/ IrO
x) coated titanium processes.
In certain embodiments, the method that the present invention relates to also comprises: handle electric flocculating and purifying water to obtain the water that chemical oxidation treatment is crossed with chemical oxidation method.
In certain embodiments, the method that the present invention relates to also comprises: about 15 ℃ to be lower than about 100 ℃ TR use below at least a method handle electric flocculating and purifying water: organism method, flucculation process, intermediate processing, air-float method and pottery or polymeric film treatment process are removed in dissolving.
In an embodiment of the present invention; Thereby electricity flocculation 60 ℃ to purifying waste water less than the unexpected silicon-dioxide that reduces significantly of 100 ℃ TR, and with before or after treatment technology combine reduce silicon-dioxide, COD (COD) and total organic carbon (TOC) with purification from the for example oily(waste)water of SAGD process.Though boron and silicon-dioxide coexistence, the energy expenditure of electricity flocculation raises along with temperature on the contrary and has reduced, and helps save energy.Electric flocculation can combine the purpose of purifying waste water to reach in every way with one or more method for purifying water among the present invention.
Example:
Following experimental example can provide reference for the people's embodiment of the present invention that has general technical ability in this area.But these examples are not limited to the scope of claim.
Example 1
With 0.203 gram Na
2SiO
3The HCL solution that adds 0.1M after being dissolved in 1 liter of deionized water with 0.6 gram NaCl is 7.5 silicon dioxde solution with preparation pH.120 milliliters of silicon dioxde solutions that obtain are put into a plastic cement beaker, heat then and remain on 80 ℃.In another parallel test, 120 milliliters of silicon dioxde solutions are put into another plastic cement beaker and carried out to contrast in room temperature (23 ℃).
Two symmetric ferroelectric utmost points (3.2cm x 4cm) part is immersed in the solution of each beaker.Direct supply (Land 2000, volts DS scope: 0～25V, maximum current: 5A, Wuhan Jin Nuo Electronics Co., Ltd., Wuhan, China) ferroelectricly extremely links to each other with two.Constant current (200mA) is imported the ferroelectric utmost point carried out the electricity flocculation in 4 minutes.
In other two plastic cement beakers, use two aluminium electrodes of onesize (3.2cm x 4cm) separately.Constant current (300mA) iontophoresis electrode was carried out the electricity flocculation in 4 minutes.Water temperature in beaker is 23 ℃, and the water temperature in another beaker is 80 ℃.
After electricity flocculation finished, the refuse that adopts centrifugal separation technique to separate to flocculate was to obtain through the solution after purifying.
Use the ammonium molybdate method on the LaMotte colorimeter, to measure silica concentration.Electricity before the flocculating and purifying original solution and use the silica concentration and the corresponding clearance of the solution that the electric flocculating and purifying of iron and aluminium electrode crosses as shown in table 1 below respectively room temperature or 80 ℃.The energy expenditure of the electric flocculation process under the different condition also is listed in the table below 1.
Various clearance calculation formula are in table 1 and follow-up other forms: (solution that original solution value or former water number-process purifies or the value of water)/original solution or former water number * 100%.
Table 1
Can find out when making electricity consumption flocculation remove silicon-dioxide, higher clearance is arranged at comparatively high temps (in the experiment 80 ℃) from table 1.Simultaneously, the energy consumption of electric flocculation process is lower under the high temperature running.Energy consumption 80 ℃ of operations is about half in room temperature.
Example 2
The former water of from Canadian SAGD plant effluent stream, obtaining and containing the boron of 7.5ppm places four glass beakers to carry out electricity and to flocculate room temperature (23 ℃), 40 ℃, 60 ℃ and 85 ℃ respectively.Use the ferroelectric utmost point (3.2cm x 4cm), electric current 100mA, 10 minutes time.The refuse that spinning is flocculated and is purified waste water with acquisition.
With total organic carbon amount (TOC) analyser (
900TOC analyser; General Electric Corporation, New York, the U.S.) and Hash 5000 (DR/5000; HACH company; The blue city of pressgang, the state of Colorado, the U.S.) come to measure respectively TOC and COD (COD).Inductively coupled plasma (ICP) is used for measuring silica concentration.The COD of electric flocculating and purifying water, TOC and silica concentration, corresponding clearance and also as shown in table 2 below under former water and the differing temps in the energy expenditure of differing temps electricity flocculation.
Table 2
Visible from table 2, the clearance of COD and silicon-dioxide tangible growth occurred from 60 ℃.As for the organic matter removal amount, be sign with TOC, in the time of 85 ℃, reach the highest clearance.Energy expenditure reduces along with the rising of temperature in the electric process with fixed attention.In the time of 85 ℃, energy expenditure has only 46.7% of room temperature.
Example 3
Purifying waste water that 85 ℃ of electricity flocculations obtain in the example 2 reheat to 85 ℃, then with the flow velocity of 6 ml/min through the electrooxidation battery.The cathode material of electrooxidation battery is a titanium, and anode material is the titanium that scribbles RuOx/IrOx.Distance between this pair of electrodes is 1 millimeter, and electrode is of a size of 4cm*10cm.Dc power supply (Land 2000, volts DS scope: 0～25V, maximum current: 5A, Wuhan Jin Nuo Electronics Co., Ltd., Wuhan, China) is connected with two electrodes.Constant current (600mA) is directed in the electrode 30 minutes.The outflow water of collecting the electrooxidation battery promptly gets electrooxidation and purifies waste water.Measure COD and TOC that electrooxidation is purified waste water.As a comparison, get 85 ℃ of samples of purifying waste water that electricity flocculation obtains in another example 2, carry out same electrooxidation experiment, but water no longer reheats, and in the room temperature electrooxidation.
The COD that 85 ℃ of electric flocculating and purifying water and differing temps electrooxidation are purified waste water and the energy expenditure of TOC, corresponding clearance and differing temps electrooxidation are as shown in table 3 below.
Table 3
Can find out that from table 3 after purifying through electrooxidation, organism is further removed from electric flocculating and purifying water.Along with the rising of temperature, organic removal rate raises.From room temperature to 85 ℃, it is about 10% that organic removal rate has increased, and the energy expenditure of electrooxidation has reduced about 14% simultaneously.Silicon-dioxide and organism in the former water have been removed in the combination of electricity flocculation and electrooxidation significantly.
Example 4
The former water of from Canadian SAGD plant effluent stream, obtaining and containing the boron of 7.5ppm filters with hyperchannel ceramic membrane element (aperture: 200mm buys from the Inopor company of German Hermsdorf) at 85 ℃.Filter the back before carrying out the electricity flocculation, put for some time.Getting the part filtering and purifying water places in the plastic beaker.Heating also remains on 80 ℃.Two ferroelectric utmost points (3.2cm x 4cm) are partially immersed in the water.Dc power supply is connected with two electrodes.The constant current of 200mA lead ferroelectric extremely in 10 minutes to carry out electricity flocculation.
In the experiment of carrying out in addition, other conditions are identical, but use the aluminium electrode of same size, and the constant current of 300mA is led electrode 10 minutes and flocculated to carry out electricity.
The flocculate refuse that of spinning is purified waste water obtaining.The TOC of former water, filtration, purification power and water flocculating and purifying water and silica concentration and corresponding clearance are as shown in table 4 below.Do not measure concentration of silicon dioxide before and after filtering, so in following table 4, do not list respective value.
Table 4
Visible from table 4, filter in the process of putting the back TOC decrease to some degree of filtering and purifying water.When making electricity consumption flocculate purification filtering to purify waste water, the silicon-dioxide in the filtering and purifying water is further removed 91.4%, and the organism in the filtering and purifying water is further removed about 20%.Ceramic membrane has been removed most silicon-dioxide and organic substance in the former water with the combination of electricity flocculation.
Though describe the present invention in conjunction with the specific embodiments, those skilled in the art will appreciate that and to make many modifications and modification the present invention.Therefore, recognize that the intention of claims is to cover all such modifications and the modification in true spirit of the present invention and the scope.
Claims (10)
1. method of purifying waste water; Comprise: about 60 degrees centigrade to be lower than about 100 degrees centigrade TR electricity consumption flocculating and purifying contain first concentration silicon-dioxide be cleaned water, thereby obtain to contain the electric flocculating and purifying water of the silicon-dioxide of second concentration that is lower than first concentration.
2. method of purifying waste water as claimed in claim 1, it further comprises: handle electric flocculating and purifying water through the electrooxidation method, purify waste water than the low electrooxidation of electric flocculating and purifying water to obtain the total organic carbon amount.
3. method of purifying waste water as claimed in claim 2, wherein the electrooxidation method is to carry out at about 85 degrees centigrade, employed electrode materials is titanium and RuO in the electrooxidation method
x/ IrO
xAt least a in the coated titanium.
4. method of purifying waste water as claimed in claim 1; It further comprises: before electricity flocculation, with sedimentation, hydrocyclone, air supporting, spinning, pottery or polymeric film, skim at least a in floating foam, chemical oxidation and the cohesion filtration and carry out pre-treatment to being cleaned water.
5. like any one described method of purifying waste water in the claim 1 to 4, the TR of wherein said electricity flocculation is about 80 degrees centigrade to about 90 degrees centigrade.
6. like any one described method of purifying waste water in the claim 1 to 4, to be cleaned water low at least one ratio in the COD of wherein electric flocculating and purifying water and the total organic carbon amount.
7. like any one described method of purifying waste water in the claim 1 to 4, wherein be cleaned water and comprise at least a in heavy metal, boron and the arsenic.
8. like any one described method of purifying waste water in the claim 1 to 4, wherein employed electrode is processed by iron or aluminium in the electricity flocculation.
9. like any one described method of purifying waste water in the claim 1 to 4; Wherein carry out having added in the process ionic flocculant of effective dose in the electricity flocculation; Wherein ionic flocculant comprises the multipolymer of acrylic amide/quaternized copolymer, Epicholorohydrin and amine, multipolymer, acrylic amide/diallyl alkylammonium multipolymer, acrylamide/acrylic acid copolymer and its esters of acrylic amide/allyl group/trialkyl/ammonium, at least a in multipolymer, PEMULEN TR2 and its esters of acrylic amide/alkyl acrylic multipolymer, acrylic amide/maleic acid, acrylic amide maleic acid, acrylic amide/2-acrylic amide-2-methyl propane sulfonic acid, the vinylformic acid/2-acrylic amide-2-methyl propane sulfonic acid multipolymer.
10. like any one described method of purifying waste water in the claim 1 to 4, it further comprises: handle electric flocculating and purifying water at about 15 degrees centigrade to being lower than at least a method that about 100 degrees centigrade TR removes with dissolved organic matter in method, flocculence, settling process, chemical oxidization method, air supporting method and pottery or the polymeric film facture.
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| CN2011100871333A CN102730804A (en) | 2011-04-08 | 2011-04-08 | A method for purifying water |
| CA2869823A CA2869823A1 (en) | 2011-04-08 | 2011-11-22 | Method for purifying aqueous stream, system and process for oil recovery and process for recycling polymer flood |
| PCT/CN2011/082583 WO2012136064A1 (en) | 2011-04-08 | 2011-11-22 | Method for purifying aqueous stream, system and process for oil recovery and process for recycling polymer flood |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103030385A (en) * | 2012-12-21 | 2013-04-10 | 江门市慧信净水材料有限公司 | Water-purifying porous ceramic |
| CN104903256A (en) * | 2012-12-07 | 2015-09-09 | 水技术国际公司 | Water treatment process |
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| CN113429041A (en) * | 2021-06-23 | 2021-09-24 | 中石化宁波工程有限公司 | Water purification treatment system with double water sources for water supply |
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| CN108275820A (en) * | 2012-12-07 | 2018-07-13 | 水技术国际有限责任公司 | Method for treating water |
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| CN107721023A (en) * | 2017-11-22 | 2018-02-23 | 天津海泽惠科技发展有限公司 | A kind of hydrazine hydrate wastewater treatment equipment and its technique |
| CN111470679A (en) * | 2019-12-11 | 2020-07-31 | 浙江美纳环保科技有限公司 | Pretreatment method of waste emulsion |
| CN113429043A (en) * | 2021-06-23 | 2021-09-24 | 中石化宁波工程有限公司 | Water purification treatment system for high-speed rail manganese silicon water source |
| CN113429041A (en) * | 2021-06-23 | 2021-09-24 | 中石化宁波工程有限公司 | Water purification treatment system with double water sources for water supply |
| CN113429042A (en) * | 2021-06-23 | 2021-09-24 | 中石化宁波工程有限公司 | Water purification treatment system |
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