CN106702414A - Method and device for producing acid and ammonia water by ammonia-nitrogen wastewater - Google Patents
Method and device for producing acid and ammonia water by ammonia-nitrogen wastewater Download PDFInfo
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- CN106702414A CN106702414A CN201510789434.9A CN201510789434A CN106702414A CN 106702414 A CN106702414 A CN 106702414A CN 201510789434 A CN201510789434 A CN 201510789434A CN 106702414 A CN106702414 A CN 106702414A
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- Prior art keywords
- exchange membrane
- ammonia
- membrane
- acid
- ammonia nitrogen
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/22—Inorganic acids
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
Abstract
The invention relates to a method and device for producing acid and ammonia water by ammonia-nitrogen wastewater. The method comprises the following steps: dividing an electrolytic bath into three compartments by using a bipolar membrane, a cation exchange membrane, an anion exchange membrane and another bipolar membrane successively, and feeding the ammonia-nitrogen wastewater into the compartment between the anion exchange membrane and the cation exchange membrane; and electrifying the electrolytic bath so that interface layers of the bipolar membranes carry out water dissociation to generate H+ and OH-, enabling NH4+ to penetrate through the cation exchange membrane and combining NH4+ with OH- to form the ammonia water, and enabling acid ions to penetrate through the anion exchange membrane and combining the acid ions with H+ to form the acid. Compared with the prior art, the method uses a bipolar membrane electrodialysis process, and has the technical effects of high integration level, energy conservation, zero consumption of any acid, alkali or salt, zero waste liquid, remarkable environmental benefit and economic benefit and the like.
Description
Technical field
The present invention relates to the processing method of industrial wastewater, the more particularly to processing method and dress of ammonia nitrogen waste water
Put.
Background technology
Ammonia nitrogen waste water is mainly manifested in two aspects for the harm of human and environment：One is ammonia nitrogen is to human body
The influence of health, the ammonia nitrogen in water can under certain condition be converted into nitrite, if drunk for a long time,
Nitrite in water will be combined into nitrosamine with protein, and this is a kind of strong carcinogen, to health
It is totally unfavorable.The second is influence of the ammonia nitrogen to ecological environment, ammonia nitrogen plays damaging effect and is mainly to aquatic organism
Free ammonia, its toxicity is more several ten times larger than ammonium salt, and increases with alkalescence enhancing.The PH of ammonia nitrogen toxicity and water
Value and water temperature have substantial connection, and generally, pH value and water temperature more high toxicity are stronger, the harm to fish
Similar nitrite.Harm of the ammonia nitrogen to aquatic organism has acute and chronic dividing.Chronic ammonia nitrogen poisoning harm
It is reduction of ingesting, slow-growing, the conveying of tissue damage and reduction oxygen between tissue.Fish are to ammonia nitrogen in water
Compare sensitive, but ammonia-nitrogen content Gao Shihui causes fish dead.The poisoning harm of acute ammonia nitrogen is：Aquatic organism
Excited, the balance in water is shown as, is twitched, severe patient is even dead.Ammonia nitrogen is caused to water body
Pollution, makes fish dead, forms the health that nitrite endangers the mankind.So ammonia nitrogen is to evaluate water body dirt
The important indicator of dye and " self-cleaning " situation
Using the method for adding alkali ammonia still process more than existing Ammonia-nitrogen wastewater treatment technology, it is put into air without reclaiming,
This is not polluted-water, but still pollution air.
The content of the invention technical problems to be solved by the invention are to provide a kind of environment friendly and pollution-free to use ammonia nitrogen
Waste water production acid and the method and device of ammoniacal liquor.
The invention is characterized in that following technical scheme is realized：Propose that a kind of ammonia nitrogen waste water produces acid and ammoniacal liquor
Method, in a cell, successively with Bipolar Membrane, cation-exchange membrane, anion-exchange membrane and Bipolar Membrane
Three compartments are divided into, ammonia nitrogen waste water is passed through in the compartment between anion-exchange membrane and cation-exchange membrane；
Electrolytic cell is powered, the boundary layer of Bipolar Membrane occurs the dissociation of water, generation H+ and OH-, NH4+ pass through sun
Amberplex and OH- combine to form ammoniacal liquor, and acid ion passes through anion-exchange membrane and H+ forms acid.
Further, the ammonia nitrogen waste water contains ammonium chloride.
Further, the ammonia nitrogen waste water contains ammonium sulfate
Further, the ammonia nitrogen waste water contains ammonium nitrate.
Specific embodiment
Is further described to the present invention with reference to preferred embodiment
The present embodiment be with ammonium chloride waste-water be raw material produce hydrochloric acid and ammoniacal liquor.Acid and ammonia are produced with ammonia nitrogen waste water
The device of water, including electrolytic cell, ammonia nitrogen waste water circulating slot, sour circulating slot and ammonia circulation groove (ammonia nitrogen gives up
Do not show in water circulating slot, sour circulating slot and ammonia circulation groove figure), the electrolytic cell successively with Bipolar Membrane BP,
Cation-exchange membrane A, anion-exchange membrane C and Bipolar Membrane BP are divided into three compartments.The ammonia nitrogen waste water is followed
Compartment between annular groove and anion-exchange membrane and cation-exchange membrane is communicated, the chlorine in ammonia nitrogen waste water circulating slot
Change ammonium concentration be electrolysed the 10ppm to concentration of emission up to standard when emit, not up to concentration of emission when, circulation is sent
It is electrolysed into the compartment between anion-exchange membrane and cation-exchange membrane.The ammonia circulation groove with it is bipolar
Compartment between film and cation-exchange membrane is communicated, and when the ammonia concn in ammonia circulation groove is more than 10%, is sent
Used to production scene, when ammonia concn is not up to 10%, then Bipolar Membrane and cation exchange are delivered in circulation
In compartment between film.Sour circulating slot is communicated with the compartment between Bipolar Membrane and anion-exchange membrane, works as acid
Acid concentration in circulating slot is delivered to production scene and is used more than 10%, just, and the acid concentration in sour circulating slot does not reach
To 10%, then in the compartment between circulation Bipolar Membrane and anion-exchange membrane.Bipolar Membrane is also known as bipolar membrane,
It is specific ion exchange membrane, it is by an anode membrane and a compounded yin, yang composite membrane of cavity block.Should
The characteristics of film is that in the presence of DC electric field, the H2O of the compound interlayer of yin, yang film is dissociated into H+ and OH-
And respectively by cavity block and anode membrane, as H+ and OH-ion source.Bipolar Membrane presses macroscopical film bulk structure point
Homogeneous Bipolar Membrane and out-phase Bipolar Membrane can be divided into.
Ammonium chloride is the salting liquid of easily ionizable, by the waste water of containing ammonium chloride be passed through anion-exchange membrane and sun from
Compartment between proton exchange.After applying direct current, there is the solution of water in the boundary layer of Bipolar Membrane (BP)
From cation NH4+ passes through cation-exchange membrane C and combines to form ammoniacal liquor with OH-, and anion Cl- wears
More anion-exchange membrane combines to form hydrochloric acid with H+.Reaction when Bipolar Membrane dissociates：2H2O→2H++
2OH-.Because H2 → 2H++2e, theoretical potential is 0V；2H2O+2e→H
2 ↑+2OH-, theoretical potential is 0.828V, so the reaction potential is two reaction sums：2H2O→
2H++2OH-, theoretical potential is 0.828V.And the electrolysis of water theoretical electricity when thering is O2 and H2 to separate out
It is 2.057V to press, and in the generation of O2 and H2,0.828V voltages disappear wherein 1.229V voltage consumptions
Consumption is on the dissociation reaction of water.
Theoretical value needs the voltage of 0.828V to act on Bipolar Membrane both sides, can just make water decomposition into H+ and
OH-, but it is actual due to film resistance, the presence of boundary layer resistance, and actual potential is higher than theoretical value.Although
In this way, Bipolar Membrane water decomposition method production soda acid still has a clear superiority, because it does not exist energy ezpenditure
In unwanted side reaction.Therefore have the following advantages that：Conciliate for ammonia nitrogen waste water treatment provides new thinking
Certainly method, dexterously using the combination of Bipolar Membrane and monopole film, is changed into salt to low energy consumption by ammonium chloride waste-water
Acid is reused for production scene with ammoniacal liquor；Process non-oxidation and reduction reaction；Without side reaction product such as O2 and
H2；Only need 1 pair of electrode, investment reduction；Electrode need not be inserted in every compartment, device volume is small.
Claims (3)
1. a kind of ammonia nitrogen waste water produces the sour method with ammoniacal liquor, it is characterised in that：In a cell, successively with Bipolar Membrane, cation-exchange membrane,
Anion-exchange membrane and Bipolar Membrane are divided into three compartments, and ammonia nitrogen waste water is passed through in the compartment between anion-exchange membrane and cation-exchange membrane；
Electrolytic cell is powered, the boundary layer of Bipolar Membrane occurs the dissociation of water, generation H+ and OH-, NH4+ pass through cation-exchange membrane and OH-
Ammoniacal liquor is combined to form, acid ion passes through anion-exchange membrane and H+ forms acid.
2. ammonia nitrogen waste water as claimed in claim 1 produces the sour method with ammoniacal liquor, it is characterised in that：The ammonia nitrogen waste water contains ammonium chloride.
3. ammonia nitrogen waste water as claimed in claim 1 produces the sour method with ammoniacal liquor, it is characterised in that：The ammonia nitrogen waste water contains ammonium sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510789434.9A CN106702414A (en) | 2015-11-16 | 2015-11-16 | Method and device for producing acid and ammonia water by ammonia-nitrogen wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510789434.9A CN106702414A (en) | 2015-11-16 | 2015-11-16 | Method and device for producing acid and ammonia water by ammonia-nitrogen wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106702414A true CN106702414A (en) | 2017-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510789434.9A Pending CN106702414A (en) | 2015-11-16 | 2015-11-16 | Method and device for producing acid and ammonia water by ammonia-nitrogen wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378984A (en) * | 2020-02-17 | 2020-07-07 | 北京科技大学 | Device and method for preparing chlorine and sodium hypochlorite by electrolyzing ammonium chloride wastewater |
| CN111892224A (en) * | 2020-08-07 | 2020-11-06 | 重庆大学 | Ammonia nitrogen wastewater treatment system and method based on south of road dialysis and osmotic distillation coupling |
-
2015
- 2015-11-16 CN CN201510789434.9A patent/CN106702414A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378984A (en) * | 2020-02-17 | 2020-07-07 | 北京科技大学 | Device and method for preparing chlorine and sodium hypochlorite by electrolyzing ammonium chloride wastewater |
| CN111892224A (en) * | 2020-08-07 | 2020-11-06 | 重庆大学 | Ammonia nitrogen wastewater treatment system and method based on south of road dialysis and osmotic distillation coupling |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |