CN102464414B - Method of removing total cyanide in sewage by using ionic transformation and oxidative disassembling - Google Patents
Method of removing total cyanide in sewage by using ionic transformation and oxidative disassembling Download PDFInfo
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- CN102464414B CN102464414B CN201010531724.0A CN201010531724A CN102464414B CN 102464414 B CN102464414 B CN 102464414B CN 201010531724 A CN201010531724 A CN 201010531724A CN 102464414 B CN102464414 B CN 102464414B
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Abstract
The invention discloses a method of removing total cyanide in sewage and especially relates to a method of removing total cyanide in sewage by using ionic transformation and oxidative disassembling, which belongs the field of environmental protection. According to the method, based on chemical characteristics of different cyanogen compounds, different removing technologies are used for a variety of cyanides of different forms; that is, a two-stage progressive SIF method of strong ionic transformation and targeted breaking is adopted for free cyanogen, high-concentration complicated cyano complexes, complex derivatives hard to degrade and coupled cyanogen; the method enables a breaking rate of total cyanogen in cyanogen-containing waste water produced by industries related to cyanogen to reach 99.99%, thereby allowing the cyanogen-containing waste water to stably meet or be superior to level 1 discharge standard as prescribed in Integrated Wastewater Discharge Standard (GB8978-1996). The method is applicable to treatment of cyanide pollutants in waste water produced and discharged in a plurality of industries, e.g., mining and mineral separation, metallurgy, mechanical processing, electroplating, chemical engineering and leather making, and has industrial popularization and application prospects.
Description
Technical field
The present invention relates to a kind of method of removing total cyanide in sewage, relate in particular to a kind of method of utilizing ion conversion and oxidative disassembling to remove total cyanide in sewage, belong to field of environment protection.
Background technology
Although prussiate belongs to hypertoxic acute harmful substances, enter water or air ambient is very harmful to people and animals' living safety with production waste discharge, belong to national strict control Chemicals.But reality also has quite a lot of industry as metallurgy in producing at present, selecting and purchasing, electroplates, chemical industry, and machining, rubber, process hides, all conglomeraties such as pharmacy are because need of production enters the waste that contains prussiate in water.While production such as choosing gold, be approximately 1: 3 to the utilization of water, when one ton of Gold Ore enters selecting and purchasing process, just need 3 tons of water.With the Small concentrator estimation of 500 tons, day ore dressing stone, producing needed fresh water every day is at least just 1500 tons.Because production process does not have damage by water consumption substantially, be 1500 tons substantially therefore discharge cyanide wastewater every day.In the time detecting in such water that cyanogen content is 90mg/L, in 1500L water containing the about 135000mg of cyanogen total amount, enter and receive sewage body with sewage.Accumulation harm is self-evident to water body safety.Along with the pay attention to day by day of people to environment protection, carry out thoroughly processing very urgent to it.In recent years, people take many kinds of measures to administer prussiate, as natural degradation method, acid volatilization method, alkaline chlorination process, flocculent precipitation, Yin Kefa, By Ozone, sodium hypochlorite oxidization, biological oxidation process etc.Although above-mentioned many technological methods have his own strong points, there is in actual applications many defects.Be summarized as follows: (1) can only process the simple cyanogen under unbound state, high density, difficult degradation, the complicated component cyanogen that various ways is existed is difficult to thoroughly, overall treatment.Especially the complex compound to cyanogen, conjugates, derivative etc. are of a great variety, and in conjunction with tight, the prussiate that is difficult to abolish is substantially helpless, make treatment effect be difficult to meet the actual needs of national environmental protection emission request and enterprise governance pollution.For example: 1., due to complicacy and the polytropy of prussiate kind, its reductibility and oxidisability have huge difference, simple oxidation style (alkaline liquid chlorine method, H
2o
2, NaClO, O
3deng) can only abolish the stronger prussiate of partial reduction, final oxidation effectiveness is often undesirable also unstable; 2. the easy dissociation of ferrous sulfate flocculent precipitation goes out cyanogen root; 3. the derivative poor effect of Yin Kefa to sulphur cyanogen and cyanogen; 4. biochemical process is immature unstable.
(2) working cost is high, and treatment facility is built up and be can not afford, and is difficult to meet the dual needs that industry energy conservation reduces discharging.
(3) technological adaptability is poor, is generally difficult to the water yield with cyaniding Pollutant levels in water, composition is different changes.Once cyaniding Pollutant levels, composition change in water displacement and water, occur that operation is unstable, emission concentration changes increasing.Form thus the technical bottleneck that is difficult to crack containing the processing of cyanogen pollutant effluents.Make such waste water can not get for a long time better processing, serious environment pollution, harm people and animals living safety.Also restrict thus the development of such enterprise.What application was comparatively general at present is alkali formula chlorination process facture, although possible in theory, research trial result and application practice prove, this technical finesse cost is up to 30 yuan/ton, the total cyanogen content of water outlet, still at 3-10mg/l, exceedes state emission standard value 5-20 doubly.
(4) technological deficiencies such as prior art ubiquity facility floor space is large, and technical process is long, and level of automation is low, not easy to operate.
Therefore, the technology that breaks traditions, carries out thoroughly becoming and changing, and researchs and develops that treatment effect is good, cost is low, easy to operate, stable efficient cyanide wastewater is processed new technology extremely urgent.
Summary of the invention
For prior art situation, the object of the invention is to provide that a kind for the treatment of effect is good, expense is low, stable, reliable, efficiently, meets the cyanide wastewater New Method for Processing of energy-saving and emission-reduction developing direction.Thoroughly break the technical bottleneck of cyanide wastewater processing, effectively protect water surrounding and edatope to avoid cyanide pollution.
For realizing the object of the invention, choose following technical scheme:
According to the chemical property of different cyanogen binding substancess in waste water, the prussiate of various multi-form existence is adopted to different removal technology, and the new design of uniqueness of taking " powerful ion conversion " and " abolishing targetedly " secondary to go forward one by one to free Cyanide, the complicated complexing cyanogen of high density, the complicated derivative of difficult degradation and coupling cyanogen is SIF method.
First adopt one-level ion conversion method to carry out pre-treatment to free Cyanide, complicated cyanogen, complexing cyanogen and difficult cyanogen derivative, the conjugates cracking in sewage: in sewage per ton, to add 0.3-0.5kg aluminium salt, and adjust pH value of sewage water to 8.0-9.5, be mainly to utilize the cyanide ion of different shape in aluminum ion in aluminium salt and sewage to generate aluminium cyano complex, complete the conversion process to different shape cyanogen complicated and changeable.On the other hand, aluminum ion reacts generation precipitation and removes with complexing cyanogen etc.; Next utilizes aluminium salt compression double electric layer, adsorption bridging and net to catch that volume such as sweeps at the principle and derivative, the conjugates etc. of removing the cyanogen that difficulty cracks, carries out brute force coprecipitated.Then adopt second stage sulfurous gas air method pointedly aluminium cyano complex to be carried out to oxidation decomposition: to add S-WAT or Sodium Pyrosulfite, dosage is 0.2-0.5g/l, is exactly not need to add expensive heavy metal ion copper sulfate as catalyzer from the important different of traditional sulfur dioxide air method.Finally adopting blast aeration mode to carry out catalyzed oxidation completes finally and cracks.Water outlet can reach below 0.5mg/l, reaches GB requirement.
Described aluminium salt is the flocculation agents such as Tai-Ace S 150, aluminium chlorohydroxide.
This SIF technological method innovative point is: the aluminium salt action adding is to utilize aluminum ion and cyanogen root to react, and forms new aluminium cyano complex, completes the ion-exchange to most cyanogen roots in sewage.Impelling the cyanogen root of multiple different shape to change into aluminium cyano complex by ion conversion process, is this technological core place.Whole exchange process only needs one-level precipitation to complete.Then utilize sulfurous gas atmospheric oxidation to abolish pointedly the aluminium cyano complex in sewage, and do not need to add expensive catalyst sulfuric acid copper, and the consumption of sulfurous gas is significantly declined, (consumption is about the half of traditional sulfur dioxide oxidizing process), its effect inverse ratio traditional technology is obviously good a lot.SIF method Treatment of Cyanide-containing Wastewater two-stage process interwoveness.Leading portion conversion is prerequisite and the basis that back segment is thoroughly abolished, and back segment is that the strong of leading portion supplements.
Beneficial effect of the present invention: (1) makes to relate to cyanogen industry and produces in cyanide wastewater total cyanogen and abolish rate and reach 99.99%, stable reach or excellent being better than " integrated wastewater discharge standard " (GB8978-1996) first discharge standard.Standard value: 0.5mg/l, best water outlet result is better than 10 times of standard values;
(2) saving energy and cost, processes 28 yuan/t of average cost by conventional art at present and drops to 3.62 yuan/t left and right, is only 1/5 of conventional art; Some technology range of decrease can be up to 90% relatively;
(3) compared with prior art, can reduce power-equipment 3/4, reduce construction investment 1/3, reduce power consumption 90%.
(4) adopt the method waste water after treatment to meet process water specification of quality completely, be back to use production technique, reach waste water " zero " discharge, save the fresh water of equivalent simultaneously.
The method can be applicable to selecting and purchasing, metallurgy, and mechanical workout, electroplates chemical industry, the improvement of cyaniding pollutent in the multiple industry production waste discharge such as process hides, environmental protection.
The present invention and existing various technological method comparative result are as following table:
Brief description of the drawings
Fig. 1 process flow diagram of the present invention;
Embodiment
For the present invention is better illustrated, as follows for embodiment:
100 tons of cyanide wastewater of certain Mining Limited Company are processed, first adding sodium carbonate adjustment pH is 8.5, add 30kg Tai-Ace S 150, by ion-exchange, chemical precipitation and the coprecipitated scheduling theory that flocculates, performance ion-exchange and chemical precipitation, the coprecipitated triple role of flocculation; Most of prussiate is changed into aluminium cyano complex and enter the second stage; Then add S-WAT 30kg, targetedly water inlet prussiate is carried out to deep oxidation processing, reach the object of removing residue cyanogen; Finally adopting blast aeration mode to carry out catalyzed oxidation completes finally and cracks.Result shows: total sewage draining exit cyanide content 0.089-0.256mg/l (the excellent order of magnitude of standard value that is better than) after processing, fully shows good and effluent quality stablize of this Technology except cyanogen effect.There is industrial application prospect.
Before and after cyanide wastewater is processed, composition, content detection comparison result are as following table:
| Period | Containing cyanogen concentration (mg/L) | Clearance |
| Before processing | 94.4 | —— |
| After processing | 0.089-0.256 | More than 99.7% |
Claims (1)
1. a method of utilizing ion conversion and oxidative disassembling to remove total cyanide in sewage, it is characterized in that: first adjust pH value of sewage water to 8.0-9.5, adopt one-level ion conversion method to add Tai-Ace S 150 or aluminium chlorohydroxide as flocculation agent, in sewage per ton, dosage is 0.3-0.5kg aluminium salt, and free Cyanide, complexing cyanogen and difficult cyanogen derivative, the conjugates cracking in sewage are carried out to pre-treatment; Then add S-WAT or Sodium Pyrosulfite, dosage is 0.2-0.5g/L, adopts sulfurous gas air method pointedly aluminium cyano complex to be carried out to oxidation decomposition; Finally adopting blast aeration mode to carry out catalyzed oxidation completes finally and cracks.
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| CN201010531724.0A CN102464414B (en) | 2010-11-04 | 2010-11-04 | Method of removing total cyanide in sewage by using ionic transformation and oxidative disassembling |
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| CN102464414B true CN102464414B (en) | 2014-11-26 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085192A (en) * | 1992-09-29 | 1994-04-13 | 赵永新 | The preparation of high-efficiency compound water purifying agent and application thereof |
| CN101186405A (en) * | 2007-12-04 | 2008-05-28 | 甘晓明 | Closed circulation processing technique for cyanide-containing waste water |
| JP2008273994A (en) * | 2006-10-18 | 2008-11-13 | Murakashi Sekkai Kogyo Kk | Composition for insolubilizing harmful substance |
| CN101723503A (en) * | 2009-12-16 | 2010-06-09 | 暨南大学 | Organic-inorganic compound high-efficient decolorizing flocculant and preparation method and application thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085192A (en) * | 1992-09-29 | 1994-04-13 | 赵永新 | The preparation of high-efficiency compound water purifying agent and application thereof |
| JP2008273994A (en) * | 2006-10-18 | 2008-11-13 | Murakashi Sekkai Kogyo Kk | Composition for insolubilizing harmful substance |
| CN101186405A (en) * | 2007-12-04 | 2008-05-28 | 甘晓明 | Closed circulation processing technique for cyanide-containing waste water |
| CN101723503A (en) * | 2009-12-16 | 2010-06-09 | 暨南大学 | Organic-inorganic compound high-efficient decolorizing flocculant and preparation method and application thereof |
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