CN102432086A - Waste water treatment device and waste water treatment method - Google Patents
Waste water treatment device and waste water treatment method Download PDFInfo
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- CN102432086A CN102432086A CN2011103341273A CN201110334127A CN102432086A CN 102432086 A CN102432086 A CN 102432086A CN 2011103341273 A CN2011103341273 A CN 2011103341273A CN 201110334127 A CN201110334127 A CN 201110334127A CN 102432086 A CN102432086 A CN 102432086A
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Abstract
The invention discloses a waste water treatment device and a waste water treatment method. In the device, a high voltage discharge connected with a high voltage source performs glow discharge in a waste water treatment tank where the electroplating wastewater passes through so as to generate low-temperature plasmas, high-energy electrons, ultraviolet light and ozone, based on high-level strong oxidation reaction between the plasmas and the electroplating wastewater, the device can perform comprehensive treatment, which is integrated with three actions of high-energy electron collision, ozone oxidation and ultraviolet light degradation, on the waste water. The method needs simple equipment and small area, saves investment, and has low energy consumption and low operating cost; and the method needs no chemical reaction additives, produces less sludge storage after oxidation, and causes no secondary pollution; and the purified water can be recycled and discharged after meeting the discharge standards.
Description
Technical field
The present invention relates to apparatus and method that electroplating wastewater is handled.
Background technology
Plating is to utilize chemistry and electrochemical method to plate various metals at metal or at other material surface.Electroplating technology is widely used in industries such as machine manufacturing, light industry, electronics.The composition of electroplating wastewater is very complicated, and except that containing cyanogen (CN-) waste water and acidic and alkaline waste water, heavy metal wastewater thereby is to electroplate the great waste water classification of industry potential hazard property.Classify according to contained heavy metal element in the heavy metal wastewater thereby, generally can be divided into and contain chromium (Cr) waste water, nickeliferous (Ni) waste water, contain cadmium (Cd) waste water, cupric (Cu) waste water, contain zinc (Zn) waste water, contain gold (Au) waste water, argentiferous (Ag) waste water etc.The improvement of electroplating wastewater at home and abroad generally comes into one's own, and has developed multiple improvement technology, through with poisonous improvement be nontoxic, harmful be converted into harmless, reclaim the quantity discharged that heavy metal was eliminated and reduced in measures such as noble metal, water cycle use.
At present, China's method of electroplating wastewater treatment mainly contains following several kinds: (1) chemical precipitation method is divided into neutralization precipitation method and sulphide precipitation again.(2) redox facture is divided into chemical reduction method, ferrite process and electrolytic process.(3) solvent extraction and separation method.(4) absorption method.(5) membrane separation process.(6) ion exchange method.(7) biological treatment comprises bio-flocculation process, biosorption process, biochemical process, phytoremediation method.
Above-mentioned seven types of method of electroplating wastewater treatment all adopt shunting and comprehensive two sections processing of physico-chemical process usually.Leading portion is handled, and generally is divided into three kinds of waste water: chromium water, cyanogen water and integrated water (copper nickel zinc water); Chromium water is with the reductive agent reduction that makes it to appraise at the current rate, and cyanogen water is used the two-stage oxidation broken cyanide, and copper nickel zinc water directly merges with preceding two strands of water and is integrated water.The beol integrated water is used alkali (caustic soda or lime), Poly aluminum Chloride (PAC) (PAC) and organic floculant (PAM), and elementary operation is: mention 10～13 to the pH value of integrated water, force the reaction of alkali and heavy metal to be carried out to the direction that generates oxyhydroxide.Because pH>9, drain drops to below 9 the pH value with the acid neutralization again.
There are many serious defectives in above-mentioned traditional treatment process.Its leading portion is handled the division of three kinds of sewage, does not meet to produce reality.Three kinds of sewage all contain each other in fact, and just the content height is different.And back segment is handled in the integrated water, and same all contaminations all exists, and can't reach emission standard through using simple processing medicament and method.Its treatment effect is not good.
Summary of the invention
The present invention aims to provide a kind of device and method that utilizes Low Temperature Plasma Treating waste water, to improve the effect of wastewater treatment.
Wastewater treatment equipment of the present invention; Comprise the wastewater treatment case; The two ends of wastewater treatment case connect water inlet pipe and rising pipe respectively; It is characterized in that: be inserted with high voltage discharge electrode in the wastewater treatment case, high voltage discharge electrode connects the positive pole of large power high voltage pulse power supply, and the negative pole of large power high voltage pulse power supply connects the housing of electroplating wastewater processing case.
Electroplating effluent treatment method of the present invention comprises the steps:
A, with waste water filtering, the oarse-grained solid impurity of filtering;
Waste water after B, use pressurized air will filter is vaporific and sprays in the wastewater treatment case;
C, control large power high voltage pulse power supply make high voltage discharge electrode photoglow to being inserted in the high voltage discharge electrode power supply in the wastewater treatment case, produce high-energy electron, plasma body, ozone and UV-light, and the waste water that sprays into is carried out comprehensive treating process;
D, liquid flows into settling tank after comprehensive treating process, and suspended particulate is precipitated in settling tank.
Wastewater treatment equipment of the present invention is supplied power to high voltage discharge electrode through control large power high voltage pulse power supply, and high voltage discharge electrode can produce intensive photoglow.Photoglow can produce a large amount of high-energy electrons, and these high-energy electrons can carry out high velocity impact to the objectionable impurities molecule, can destroy the molecular structure of objectionable impurities, and macromole has been become small molecules, and the molecule of high-order has become the molecule of low order.Photoglow makes reactor inner space produce the low-temperature plasma of high density rapidly simultaneously; Make in the electroplating wastewater in the inflow reactor material molecule whole moments be in active state; Especially can also be more conducive to the collision of high-energy electron and contaminant molecule simultaneously extremely fast with its activation cmpletely to be the vaporific waste water that sprays into through pressurized air.The plasma physical efficiency with destroyed by high-energy electron after water in the organic pollutant small molecules react, directly it is oxidized to CO2, water or salt, and with organic matter removal; The metal pollutant that plasma body exists in the oxidation electroplating wastewater fast makes it become free of contamination oxide compound.In addition; Photoglow also can be supervened ultraviolet ray and ozone simultaneously; Ultraviolet ray can be decomposed the part pollutent in the waste water; UV-light and ozone can be strengthened the catalysed oxidn to the pollutent of the liquid in the wastewater treatment case simultaneously, can also strengthen the sterilization functions to liquid, further promote the treatment effect of treatment unit.The rising pipe of wastewater treatment case can feed settling tank, through settling tank with suspended particulate at post precipitation, discharging by settling tank.
Electroplating waste processing equipment of the present invention utilizes the effects such as collision, ozone oxidation, UV-light decomposition, catalyzed oxidation of activation, the high-energy electron of the plasma body that photoglow produces to purify water rapidly.Plasma body has extremely strong oxidizing reaction ability, is made up of the particles such as atom, molecule and OH radical of electronics, negative ions, excited state.Its radical can not have selectively with destroyed by high-energy electron after the water pollutant small molecules react; Directly with its oxidation; Metal pollutant is oxidable to be oxide compound, and organic pollutant is oxidable to be CO2, water or salt, thereby organic pollutant and metal pollutant are removed.Said electroplating waste processing equipment, processing cost is low, and efficient is high, effective; And need not to adopt the shunting of physico-chemical process in the treating processes, also without any need for the chemical reaction additive, the mud storage after the oxidation is also few; Water after the purification can be recycled and qualified discharge through the settling tank post precipitation.
Description of drawings
Fig. 1 is a kind of device of low-temperature plasma comprehensive treating process electroplating wastewater.
Embodiment
Embodiment 1, and a kind of treatment unit of electroplating wastewater like Fig. 1, includes wastewater treatment case 1, and wastewater treatment case one end connects water inlet pipe 2, and the other end connects rising pipe 3; High voltage discharge electrode 4 is inserted in the cavity of wastewater treatment case, and the outside that its end is positioned at the wastewater treatment case is connected with the positive pole of large power high voltage pulse power supply 5, and the negative pole of large power high voltage pulse power supply connects the housing of wastewater treatment case.Through controlling its control high-voltage pulse power source power supply, high voltage discharge electrode can produce intensive photoglow, produces high density plasma body, high-energy electron, ozone and UV-light rapidly in wastewater treatment case internal space.Flow in the electroplating wastewater of wastewater treatment case material molecule all moment be in active state, the wastewater treatment case then utilizes the active substance of generation and high-energy electron collision, ozone, the UV-light supervened wait rapidly and purify water.
The rising pipe of wastewater treatment case can connect deposition pond 6, and the water after the purification can be discharged in the deposition pond, supplies to recycle or discharge.
High-pressure sprayer can be installed by the water inlet pipe place of wastewater treatment case, and electroplating wastewater is the water smoke shape through pressurized air and is injected in the wastewater treatment case from high-pressure sprayer.
Said wastewater treatment case preferably is inclined to set, and water inlet pipe is communicated with the upper end of wastewater treatment case, and rising pipe is communicated with the lower end of wastewater treatment case, like Fig. 1.It makes in the effluve process, and as the PM for particulate matter of the processing tank housing absorption of accepting the utmost point, the wall that can under the impact of deadweight and current, tilt along casing glides, thereby discharges from rising pipe easily.
Claims (5)
1. electroplating waste processing equipment; Comprise the wastewater treatment case; The two ends of wastewater treatment case connect water inlet pipe and rising pipe respectively; It is characterized in that: be inserted with high voltage discharge electrode in the wastewater treatment case, high voltage discharge electrode connects the positive pole of large power high voltage pulse power supply, and the negative pole of large power high voltage pulse power supply connects the housing of electroplating wastewater processing case.
2. electroplating waste processing equipment according to claim 1 is characterized in that: the rising pipe rear end is connected with the deposition pond.
3. electroplating waste processing equipment according to claim 1 is characterized in that: the water inlet pipe ingress is equipped with high-pressure sprayer.
4. electroplating waste processing equipment according to claim 1 is characterized in that: the wastewater treatment case preferably is inclined to set, and water inlet pipe is communicated with the upper end of wastewater treatment case, and rising pipe is communicated with the lower end of wastewater treatment case.
5. an electroplating effluent treatment method is characterized in that: comprise the steps:
A, electroplating wastewater is filtered the oarse-grained solid impurity of filtering;
Waste water after B, use pressurized air will filter is vaporific and sprays in the wastewater treatment case;
C, control large power high voltage pulse power supply make high voltage discharge electrode photoglow to being inserted in the high voltage discharge electrode power supply in the wastewater treatment case, produce high-energy electron, plasma body, ozone and UV-light, and the waste water that sprays into is carried out comprehensive treating process;
D, liquid flows into settling tank after comprehensive treating process, and suspended particulate is precipitated in settling tank.
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| CN2011103341273A CN102432086A (en) | 2011-10-28 | 2011-10-28 | Waste water treatment device and waste water treatment method |
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| CN2011103341273A CN102432086A (en) | 2011-10-28 | 2011-10-28 | Waste water treatment device and waste water treatment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104709968A (en) * | 2015-03-03 | 2015-06-17 | 重庆青天环保材料有限公司 | Method and device system for treatment of electroplating wastewater |
| CN104961222A (en) * | 2015-06-08 | 2015-10-07 | 浙江大学 | Method for degrading organic pollutants in water under synergetic catalysis of plasma and pyrite |
| CN108383199A (en) * | 2018-03-29 | 2018-08-10 | 南京中意昂环境科技发展有限公司 | A method of utilizing corona treatment water |
| CN110803817A (en) * | 2019-12-10 | 2020-02-18 | 安徽千一智能设备股份有限公司 | Multi-element catalytic plasma oxidation tower and method for treating high-toxicity chemical wastewater |
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| JPH10174980A (en) * | 1996-12-17 | 1998-06-30 | Shigeji Ota | Method and apparatus for improving water quality |
| JP2006130410A (en) * | 2004-11-05 | 2006-05-25 | Kobe Steel Ltd | Liquid treatment method and liquid treatment apparatus |
| CN101066791A (en) * | 2007-06-19 | 2007-11-07 | 中山大学 | Triphase AC sliding arc non-balancing plasma sewage treating apparatus |
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| CN201169552Y (en) * | 2007-12-29 | 2008-12-24 | 大连理工大学 | Self-cooling medium barrier discharging ozone water treating device |
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| CN102134116A (en) * | 2011-03-16 | 2011-07-27 | 华中科技大学 | Tubular dielectric barrier corona discharge reaction device for coaxial line |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104709968A (en) * | 2015-03-03 | 2015-06-17 | 重庆青天环保材料有限公司 | Method and device system for treatment of electroplating wastewater |
| CN104961222A (en) * | 2015-06-08 | 2015-10-07 | 浙江大学 | Method for degrading organic pollutants in water under synergetic catalysis of plasma and pyrite |
| CN108383199A (en) * | 2018-03-29 | 2018-08-10 | 南京中意昂环境科技发展有限公司 | A method of utilizing corona treatment water |
| CN110803817A (en) * | 2019-12-10 | 2020-02-18 | 安徽千一智能设备股份有限公司 | Multi-element catalytic plasma oxidation tower and method for treating high-toxicity chemical wastewater |
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