CN102070231A - Compound type sewage treatment method and device thereof - Google Patents
Compound type sewage treatment method and device thereof Download PDFInfo
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- CN102070231A CN102070231A CN 201010601056 CN201010601056A CN102070231A CN 102070231 A CN102070231 A CN 102070231A CN 201010601056 CN201010601056 CN 201010601056 CN 201010601056 A CN201010601056 A CN 201010601056A CN 102070231 A CN102070231 A CN 102070231A
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Abstract
The invention relates to a compound type sewage treatment method and a device thereof. The compound type sewage treatment method comprises the following steps: firstly, magnetic seeds, a coagulating agent, a coagulant aids and sewage are added to carry out coagulating reaction so as to form magnetic floccule clusters, a magnetic separator absorbs the magnetic floccule clusters on the surfaces of stainless steel plush balls, and pure water flows out from the bottom of the magnetic separator; magnetic sludge floccule flows into an electrochemical reactor from the bottom of the magnetic separator; the magnetic sludge floccule is used as electrolyte, and electrochemical oxidation treatment is carried out on the magnetic sludge floccule; water and carbon dioxide are obtained under the action of external voltage; active radical generated around a cathode and an anode destroys microorganism cell structure directly or by a series of oxidation chain-type reaction, reducing bacteria and saprophytic bacteria of sulfate are killed, and nontoxic and harmless silt and sediment containing the magnetic seeds are obtained; and the magnetic seeds is recovered by an electromagnetic device and then is recycled, and nontoxic sludge can be used as building material or can be used for direct landfilling after being dewatered.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, particularly the treatment process of sanitary sewage, organic waste water (as oil extraction waste water, paper waste, slaughterhouse wastewater, dyeing waste water etc.) and polluted river water.
Background technology
Domestic process for treating industrial waste water mainly contains chemical method and biological treatment at present.Chemical method carries out effects such as static neutralization, adsorption bridging by coagulating agent, inhibiter, Scale inhibitors, sterilant etc. to colloidal particle take off surely colloidal particle, in order to remove suspended substance and the solubility organic pollutant in the sewage.Because organic pollutant just is condensed into bulk and breaks away from from water, organism itself is not effectively degraded, and causes a large amount of mud flcos, makes that running cost is high and produces secondary pollution; Biological treatment utilizes the biochemical action of microorganism, and with organic matter degradation, the conversion of complexity, decontamination effect improving is higher than chemical method, avoid secondary pollution simultaneously, but floor space is big, simultaneously natural condition is had relatively high expectations; Especially at the organic pollutant of some difficult degradation, also not developing at present can ripe effectively microorganism mushroom.Especially in oil production waste water in oil field is handled, problems such as aforesaid method exists that investment is big, running cost is high, long reaction time, floor space are big, energy consumption height make that the water after handling still can not reach the re-injection water quality standard and efflux water quality standard.
Magnetic separation technique is a kind of technology of material being carried out magnetic field treatment, utilizes the difference of element or component magnetic susceptibility, by foreign field material is carried out magnetic field treatment, thereby reaches a kind of emerging technology of strengthening sepn process, belongs to physical partition method.Mainly utilize magnetic----stress effect, waste water is applied magnetic field, make magnetic-particle magnetization, cohesion in the waste water, form and be easy to isolating flocs unit, directly separate; For non-magnetic particle, carry out chemical flocculation by adding the magnetic kind, separated thereby generate the magnetic flocs unit.Magnetic separates water technology and has advantages such as investment is little, treatment effect good, occupation of land is little, but in present application, because magnetic kind and chemical flco reclaim by the weave in of motive power complexity is extremely difficult, owing to add high viscosity, the difficult degradation, difficult biochemical that a large amount of chemical agents cause the mud flco.Magnetic kind recovery technology mainly contains and uses big centrifugal force cyclone separator to carry out the recovery of magnetic kind at present, and efficient has only 40-60%; The strong shearing force that utilizes Vltrasonic device to produce in addition is that the magnetic kind is separated with flco, but working cost is high; The magnetic kind can not efficient recovery have caused the waste of magnetic kind, has increased water treatment running cost and follow-up sludge treatment difficulty.How solving the high efficiency separation of magnetic kind and recycling is the magnetic separation technique problem demanding prompt solution.
Summary of the invention
The purpose of this invention is to provide a kind of based on magnetic separation and electrochemical combined type wastewater treatment method and device, can guarantee under the prerequisite that sewage effectively purified, realize the high efficiente callback (rate of recovery reaches more than 98%) of magnetic kind, make the mud flco nontoxic simultaneously.
For achieving the above object, the present invention at first adopts magnetic separation technique that sewage is handled, and adopt electrochemical oxidation technology that magnetic is separated the magnetic flco group that produces and carry out subsequent disposal, technical scheme is: at first (is example with the oil extraction waste water) adds the magnetic kind in sewage, coagulating agent, coagulant aids carries out coagulating, form magnetic flco group this moment in the water, by magnetic separation technique magnetic flco group is separated from water again, this moment, water body purified up to standard, and isolated magnetic flco group need carry out subsequent disposal, and its main component is the magnetic kind, organic pollutant and the silt sediment that forms naturally.Chemical agents such as the emulsion splitter that adds when polymkeric substance, produced water disposals such as the exhibiting high surface promoting agent that adds when wherein organic pollutant is mainly oil producing operation, polypropylene phthalein amine, coagulating agent, inhibiter, Scale inhibitors and sulphate reducing bacteria, saprophytic microorganism etc. various bacteriums.Organic pollutant by in the powerful degraded of the electrochemical oxidation reactions flco group makes its burning be converted into water and carbonic acid gas, kill bacteria.Magnetic kind and nontoxic silt sediment are only contained in magnetic flco group after electrochemical treatment, reclaim the magnetic kind through calutron again, continue recycle, and last nontoxic mud directly dewaters and gets final product.
The magnetic separation technique principle that the present invention adopts in technique scheme is: add magnetic kind, coagulating agent and coagulant aids in waste water, generation is the magnetic mesh flco throw out of core with the magnetic kind, during then by magnetic separator, the magnetic flco is captured under the action of a magnetic field and separates from water, and water is purified.
The present invention uses the high strength high gradient magnetic separator, is made up of the separation vessel of conjugation iron, solenoid and the stainless steel wool of filling.During energising, solenoid generates an electromagnetic field, and the magnetic flco group of flowing through in the waste water of separator is subjected to magneticaction in magnetic field, and caught by stainless steel wool, the separating power of high gradient magnetic separator is better than conventional magnetic separator, and gradient is high more, and separating power is strong more.High gradient magnetic separator can be designed to single cover and add regular back flushing, also can be designed to two complete equipments, separates and the back flushing alternate run.In order to reduce cost of investment, energy consumption, the reliability of assurance equipment operation is for the preferred single cover of the present invention adds regular back flushing design.
Magnetic kind used in the present invention is a kind of in Z 250, ironic hydroxide, the ferrous hydroxide, is Z 250 according to mass ratio perhaps: ironic hydroxide: ferrous hydroxide=(0-60): (0-50): mixture (0-60).
The electrochemical oxidation technology principle that the present invention is adopted in technique scheme is: the magnetic flco group that will handle (general water ratio 30%-70%) is as ionogen, under the effect of impressed voltage (electric field), moment produces a large amount of based on hydroxyl radical free radical [OH] in the magnetic flco group, and a series of strong oxidizers of constituting of other oxygenants such as hypochlorous acid, free chlorine, hydrogen peroxide, by continuous chain reaction the most at last the organic pollutant combustion degradation become carbonic acid gas and water; And can directly or by a series of oxidation chain reaction destroy the microorganism cells structure by the living radical that electrolysis produces, thereby thoroughly kill various bacteriums.Magnetic kind in the magnetic flco group had lost the motive power between original and the organic pollutant, very easily Separation and Recovery at this moment.Remaining mud is some silt sediments, and itself is nontoxic, can be used for various aspects such as fertilizer, material of construction through the mud cake that is produced behind the powerful dehydration again.
Electrochemical reactor of the present invention mainly is made up of anode, negative electrode, voltage stabilized source and reactor shell.During energising, produce strong oxidizers such as great amount of hydroxy group free radical, hydrogen peroxide around anode and the negative electrode, the pollutent during powerful degraded magnetic flco is rolled into a ball.Also can in reactor, add catalyzer and be used to improve electrochemical reaction speed.
The present invention uses magnetic to separate and the electrochemistry complex method is handled trade effluent, and main device is automatic medicament feeding machine, coagulation reactor, high gradient magnetic separator, electrochemical reactor, electromagnetism kind withdrawer, centrifuge.Technological step is:
1. waste water enters coagulation reactor, certain density magnetic kind, coagulating agent, coagulant aids is added in the coagulation reactor by automatic medicament feeding machine fully reacts with waste water, forms magnetic flco group;
2. the water outlet of coagulation reactor enters into high gradient magnetic separator, the inner high strength high-gradient magnetic field that produces of energising back separator, and the magnetic flco is rolled into a ball by hard magnetization, separates with water body thereby be adsorbed on the stainless steel lint ball, and is up to standard from the water body that separator is discharged.After the processing of carrying out for some time, stainless steel lint ball surface reaches capacity, and needs the outage demagnetization and makes water carry out back flushing to the bristle ball, and the magnetic flco group after the flushing enters into electrochemical reactor with wash-down water.
3. electrochemical reactor energising back produces strong electric field, produces a large amount of strong oxidizers in wash-down water, based on hydroxyl radical free radical, also has other oxygenants such as hypochlorous acid, free chlorine, hydrogen peroxide.Carry out continuous chain type DeR with the organic pollutant in the magnetic flco, final product is carbonic acid gas and water.Unwanted bacteria is killed by strong oxidizer, and inorganic pollutant transfers precipitation to.After the electrochemical reaction, the silt sediment of the magnetic flco group remanent magnetism kind in the wash-down water, inorganic precipitation, nature enters into electromagnetism kind withdrawer again.
Since the magnetic kind and do not have complexing action power in the magnetic flco group between the inorganic precipitation, natural silt, very easily separate, so electromagnetism kind withdrawer uses the electromagnetic device of common intensity to get final product.
5. electromagnetism kind withdrawer regularly carries out back flushing, and wash-down water and magnetic kind are evacuated to coagulation reactor by pump and continue reaction.The mud of nature then enters powerful whizzer and dewaters, and deviates from water for purifying waste water, and mud cake is nontoxic, can be used as aspects such as fertilizer, material of construction.
6. one-period finishes, and continues next cycle from step 1 again, moves in circles.
The present invention uses magnetic to separate and the electrochemistry complex method is handled trade effluent, and its technical superiority is:
1. magnetic separation method itself has advantages such as investment is little, treatment effect good, floor space is little, stable;
2. the high strength high gradient magnetic separator can be realized high efficiency separation, and is reliable and stable and running cost is low.
3. use electrochemical oxidation technology that magnetic flco group is carried out the electrochemical combustion DeR, effectively decomposed the organic pollutant in the flco, killed unwanted bacteria, the conversion inorganic pollutant is natural sedimentation.The one, make magnetic kind and flco group lose various pretending firmly, very easily separate, realized the high efficiente callback of magnetic kind; The 2nd, make follow-up sludge treatment only need dewater and get final product that deviate from water originally as purifying waste water, mud cake is nontoxic.
4. the level of automation height of total system can be realized omnidistance incorporate monitoring and control, makes treatment scheme become very compact.
Description of drawings
Fig. 1 process flow diagram
Fig. 2 high gradient magnetic separator structural representation
Fig. 3 electrochemical reactor structural representation
Wherein:
1, automatic medicament feeding machine 2, coagulation reactor 3, high gradient magnetic separator 4, back-purge system 5, electrochemical reactor 6, electromagnetism kind withdrawer 7, horizontal helical type centrifuge 8, reflux pump 9, treated water outlet 10, nontoxic mud cake 3-1, conjugation magnet 3-2, magnet coil 3-3, stainless steel lint ball 3-4, bristle box 3-5, positive source 3-6, power cathode 3-7, sewage 3-8 behind the coagulation, wash-down water 5-1, anode 5-2, negative electrode 5-3, mud import 5-4, sludge outlet 5-5, venting port 5-6, power supply 5-7, catalyzer
Embodiment
A kind of waste disposal plant of the present invention, connect and compose successively by automatic medicament feeding machine 1, coagulation reactor 2, high gradient magnetic separator 3, electrochemical reactor 5, electromagnetism kind withdrawer 6, horizontal helical type centrifuge 7, reflux pump 8 connects electromagnetism kind withdrawer 6 and coagulation reactor 2, and electromagnetism kind withdrawer 6 is connected with back-purge system 4 respectively with high gradient magnetic separator 3; High gradient magnetic separator 3 is provided with treated water outlet 9, and the horizontal helical type centrifuge is provided with treated water outlet and nontoxic mud cake outlet 10.(see figure 1)
High gradient magnetic separator 3 is made of housing, conjugation magnet 3-1, magnet coil 3-2, stainless steel lint ball 3-3, bristle box 3-4, positive source 3-5, power cathode 3-6; Magnet coil 3-2 is wound on the bristle box 3-4, is connected with positive source 3-5, power cathode 3-6 respectively, and bristle box 3-4 is arranged in conjugation magnet 3-1, and stainless steel lint ball 3-3 is filled among the bristle box 3-4; After the energising, the sewage 3-7 behind the coagulation enters among the bristle box 3-4 of high gradient magnetic separator 3, and magnetic flco group is adsorbed in stainless steel lint ball 3-3 surface, purifies waste water and flows out from high gradient magnetic separator 3 bottoms; After the outage, wash-down water 3-8 carries out back flushing to stainless steel lint ball 3-3, and the mud after the separation flow into electrochemical reactor 5 from the magnetic separator bottom.(see figure 2)
High gradient magnetic separator 3 of the present invention can be handled sanitary sewage, organic waste water (as oil extraction waste water, paper waste, slaughterhouse wastewater, dyeing waste water) and contaminated river etc. effectively.Representational clearance is: BOD60～90%, and COD80～90%, turbidity 75～95%, colourity is more than 90%, phosphoric acid salt 85～97%.
Claims (7)
1. combined type wastewater treatment method is characterized in that:
(1) at first adds magnetic kind, coagulating agent, coagulant aids and sewage and carry out coagulating formation magnetic flco group, the inner high strength high-gradient magnetic field that produces in magnetic separator energising back, magnetic flco group is adsorbed in stainless steel lint ball surface, purifies waste water to flow out from the magnetic separator bottom; After the outage, wash-down water carries out back flushing to stainless steel lint ball, and the magnetic sludge flco after the separation flow into electrochemical reactor from the magnetic separator bottom;
(2), the magnetic sludge flco as ionogen, is carried out electrochemical oxidation to it and handles at electrochemical reactor; Under the alive outside effect, moment produces a large amount of strong oxidizers based on hydroxyl radical free radical around the magnetic sludge flco, makes the continuous oxidized degraded of organic pollutant, obtains water and carbonic acid gas; The living radical that produces around the anode and cathode directly or by a series of oxidation chain reaction destroys the microorganism cells structure, kills sulphate reducing bacteria and saprophytic microorganism;
(3) magnetic kind and nontoxic silt sediment are only contained in magnetic flco group after electrochemical treatment, the recycle after calutron reclaims of magnetic kind, and nontoxic mud gets final product through dehydration.
2. combined type wastewater treatment method according to claim 1, it is characterized in that: the magnetic kind is a kind of in Z 250, ironic hydroxide, the ferrous hydroxide, is Z 250 according to mass ratio perhaps: ironic hydroxide: ferrous hydroxide=(0-60): (0-50): mixture (0-60).
3. combined type wastewater treatment method according to claim 1 is characterized in that: add callable catalyzer in electrochemical reactor.
4. combined type wastewater treatment method according to claim 3 is characterized in that: catalyzer is by one or more mixtures in ceramic oxide, alkaline-earth oxide, strontium oxide, the titanium oxide, and sintering forms under hot conditions.
5. described compound sewage treatment device of claim 1, constitute by automatic medicament feeding machine, coagulation reactor, high gradient magnetic separator, back-purge system, electrochemical reactor, electromagnetism kind withdrawer, horizontal helical type centrifuge, reflux pump, it is characterized in that: automatic medicament feeding machine, coagulation reactor, high gradient magnetic separator, electrochemical reactor, electromagnetism kind withdrawer, horizontal helical type centrifuge connect successively, reflux pump connects electromagnetism kind withdrawer and coagulation reactor, and electromagnetism kind withdrawer is connected with back-purge system respectively with high gradient magnetic separator; High gradient magnetic separator is provided with treated water outlet, and the horizontal helical type centrifuge is provided with treated water outlet and the outlet of nontoxic mud cake.
6. compound sewage treatment device according to claim 5, high gradient magnetic separator is made of housing, conjugation magnet, magnet coil, stainless steel lint ball, bristle box, positive source, power cathode; It is characterized in that: magnet coil is wound on the bristle box, is connected with positive source, power cathode respectively, and the bristle box is arranged in the conjugation magnet, and stainless steel lint ball is filled in the bristle box.
7. compound sewage treatment device according to claim 5, electrochemical reactor is made of housing, anode, negative electrode, mud import, sludge outlet, venting port, power supply; It is characterized in that: organize the anode intersecting more and be arranged in reactor; Negative electrode is positioned at the periphery of housing inner anode, and anode, negative electrode are connected with power positive cathode respectively; Case top is provided with the venting port by pneumavalve control; Catalyst filling between anode region.
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| CN2010106010564A CN102070231B (en) | 2010-12-22 | 2010-12-22 | Compound type sewage treatment method and device thereof |
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| CN2010106010564A CN102070231B (en) | 2010-12-22 | 2010-12-22 | Compound type sewage treatment method and device thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103183442A (en) * | 2012-08-31 | 2013-07-03 | 大庆市乾晟机械制造有限公司 | Water treatment technology adopting oil-sludge magnetic separation |
| CN103341403A (en) * | 2013-07-11 | 2013-10-09 | 北京精瑞科迈净水技术有限公司 | Super-magnetic separator and super-magnetic separation system for recovering magnetic powder |
| CN104073287A (en) * | 2014-07-08 | 2014-10-01 | 清华大学 | High-efficiency magnetic demulsifier capable of being controllably recovered aiming at water-in-oil system emulsion and preparation method thereof |
| CN104261535A (en) * | 2014-09-28 | 2015-01-07 | 佑景天（北京）国际水环境研究中心有限公司 | Efficient discoloring agent and discoloring treatment method of printing and dyeing wastewater |
| CN104876306A (en) * | 2015-05-11 | 2015-09-02 | 河海大学 | Method for treating sewage employing magnetic field |
| CN104925989A (en) * | 2015-05-21 | 2015-09-23 | 苏州膜海分离技术有限公司 | Micro-flocculation and ultrafiltration integrated water treatment equipment |
| CN105217695A (en) * | 2015-08-28 | 2016-01-06 | 南京大学 | The methods and applications of a kind of novel magnetic nano magnetic kind and process industrial biochemistry tail water thereof |
| CN105585232A (en) * | 2015-12-21 | 2016-05-18 | 广西壮族自治区环境保护科学研究院 | Dispersing and demagnetizing method of magnetic carrier containing sludge |
| CN106145444A (en) * | 2016-07-26 | 2016-11-23 | 广西壮族自治区环境保护科学研究院 | A kind of heavy metal-polluted water treatment system |
| CN107540144A (en) * | 2016-06-24 | 2018-01-05 | 江苏天鑫中冶环保设备有限公司 | A kind of novel oilfield sewage disposal system |
| CN108178417A (en) * | 2018-02-28 | 2018-06-19 | 范勇 | A kind of purifying equipment for running water and method |
| CN110325257A (en) * | 2016-10-05 | 2019-10-11 | 哈里发科学技术大学 | Method for removing heat stable salt from solvent |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103183442A (en) * | 2012-08-31 | 2013-07-03 | 大庆市乾晟机械制造有限公司 | Water treatment technology adopting oil-sludge magnetic separation |
| CN103341403A (en) * | 2013-07-11 | 2013-10-09 | 北京精瑞科迈净水技术有限公司 | Super-magnetic separator and super-magnetic separation system for recovering magnetic powder |
| CN104073287A (en) * | 2014-07-08 | 2014-10-01 | 清华大学 | High-efficiency magnetic demulsifier capable of being controllably recovered aiming at water-in-oil system emulsion and preparation method thereof |
| CN104261535A (en) * | 2014-09-28 | 2015-01-07 | 佑景天（北京）国际水环境研究中心有限公司 | Efficient discoloring agent and discoloring treatment method of printing and dyeing wastewater |
| CN104876306A (en) * | 2015-05-11 | 2015-09-02 | 河海大学 | Method for treating sewage employing magnetic field |
| CN104925989A (en) * | 2015-05-21 | 2015-09-23 | 苏州膜海分离技术有限公司 | Micro-flocculation and ultrafiltration integrated water treatment equipment |
| CN105217695A (en) * | 2015-08-28 | 2016-01-06 | 南京大学 | The methods and applications of a kind of novel magnetic nano magnetic kind and process industrial biochemistry tail water thereof |
| CN105585232A (en) * | 2015-12-21 | 2016-05-18 | 广西壮族自治区环境保护科学研究院 | Dispersing and demagnetizing method of magnetic carrier containing sludge |
| CN107540144A (en) * | 2016-06-24 | 2018-01-05 | 江苏天鑫中冶环保设备有限公司 | A kind of novel oilfield sewage disposal system |
| CN106145444A (en) * | 2016-07-26 | 2016-11-23 | 广西壮族自治区环境保护科学研究院 | A kind of heavy metal-polluted water treatment system |
| CN110325257A (en) * | 2016-10-05 | 2019-10-11 | 哈里发科学技术大学 | Method for removing heat stable salt from solvent |
| CN108178417A (en) * | 2018-02-28 | 2018-06-19 | 范勇 | A kind of purifying equipment for running water and method |
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