CN102701343A - Process for treating ammonium nitrate wastewater according to membrane combination method - Google Patents
Process for treating ammonium nitrate wastewater according to membrane combination method Download PDFInfo
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- CN102701343A CN102701343A CN201210207120XA CN201210207120A CN102701343A CN 102701343 A CN102701343 A CN 102701343A CN 201210207120X A CN201210207120X A CN 201210207120XA CN 201210207120 A CN201210207120 A CN 201210207120A CN 102701343 A CN102701343 A CN 102701343A
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Abstract
The invention provides a process for treating ammonium nitrate wastewater according to a membrane combination method. The process comprises the following steps: (1) the ammonium nitrate wastewater is treated by an electrodialysis (ED) system, water output from the ED system is subjected to the treatment in step (2), and concentrated water enters an evaporation system; (2) the water output in the step (1) is treated by a nanofiltration (NF) system, water output after the treatment by the NF system is subjected to the treatment in step (3), and concentrated water is sent back to be subjected to the treatment in the step (1); and (3) the water output in the step (2) is treated by an electrodeionization (EDI) system, water output after the treatment by the EDI system is sent to a water using point to be reused, and concentrated water is sent back to be treated by the NF system in the step (2). The process provided by the invention has the advantages that the combination is reasonable; the investment and the running cost are reduced; and the ammonium salt in the wastewater is treated in time, so as to change waste into valuable and realize zero emission.
Description
Technical field
The present invention relates to a kind of technology of film combined method treatment of nitric acid ammonium waste water.
Background technology
Along with developing rapidly of China's industry, the generation of ammonium nitrate wastewater is more and more serious to environmental influence, and a large amount of dischargings of ammonia nitrogen wherein all can cause environment is produced very big harm, and have caused several bigger hazardous events.Ammonia nitrogen concentration is too high in the water body, can cause the water body oxygen enrichmentization, and water resources worsens, and also can cause the health of human body and must influence simultaneously.In China, the processing of ammonium nitrate wastewater remains a problem demanding prompt solution at present, and therefore, studying cost-effectively, the technology of treatment of nitric acid ammonium waste water is of great practical significance.
In the Process of Ammonium Nitrate Production, discharged by moisture form with secondary steam in neutralization, evaporation and crystallisation process that rare nitric acid is brought into, the process condensate of formation becomes the main source of sewage of ammonium nitrate production.These phlegmas are unfavorable for production safety if directly discharging can make ammonia-nitrogen content severe overweight in the sewage again as directly sending the nitric acid absorption tower reuse back to, and can not fully recovering.Owing to lack effective control measures, some producers adopt converts water-reducible way to realize qualified discharge.At present; The place and the industry sewage drainage standard of new revision have all improved ammonia, nitrogen standard in succession; And emission limit, the water pollutant base platoon water yield and the emission concentration of pollutent done respective specified, the improvement of an ammonium nitrate phlegma and recycling become the difficult problem that ammonium nitrate production enterprise needs to be resolved hurrily.
At present; The method of domestic existing employing electrodialysis process ammonium nitrate wastewater; But because the limitation of electrodialysis self, adopt merely that electrodialysis is not only invested greatly, working cost is high, and exist reuse water can't satisfy up-to-date discharging standards (NH3-N < 10mg/>L); And do not reclaim the process characteristic the angle systems analysis course of processing, carry out the comprehensive treating process of waste water from cleaner production, watering balance, resource.
Summary of the invention
Technical problem to be solved by this invention provides a kind of technology of film combined method treatment of nitric acid ammonium waste water, can carry out comprehensive treating process to ammonium nitrate wastewater, realizes the ammonium nitrate wastewater zero release.For this reason, the present invention adopts following technical scheme: it carries out the processing of following steps to ammonium nitrate wastewater:
(1): system handles with electrodialysis (ED), and electrodialysis system produces water and carries out the processing of step (2), and dense water gets into vapo(u)rization system;
(2), the product water of step (1) is handled, the product water after handling through nanofiltration system is delivered to the processing of step (3), and dense water is back to step (1) and handles with nanofiltration (NF) system;
(3), the product water of step (2) is handled, deliver to through the product water after the EDI system handles and use water spot reuse, dense water to be back to step (2) to carry out the nanofiltration system processing again with electrodeionization (EDI) system.
On the basis of adopting technique scheme, the present invention also can adopt following further technical scheme:
Also ammonium nitrate wastewater is carried out handling early stage to following index: CODcr in that step (1) is preceding: < 30mg/>l; The content of suspended solids: below 10 mg/l; PH:5-7; < 35 ℃ of temperature.
In step (1), electrodialytic water inlet pH value is controlled between the 5-7, handles ammonia nitrogen concentration≤0.1% (mass percent) that water is produced in the back, the ammonia nitrogen concentration of dense water>=10% (mass percent); In step (2), the product water ammonia nitrogen concentration≤20ppm of nanofiltration system, dense water ammonia nitrogen concentration>=0.5%; In step (3), the product water ammonia nitrogen concentration of EDI system<5mg/L, dense water ammonia nitrogen concentration>=50mg/L.
The dense water of said step (2) gets into the vapo(u)rization system of step (1) and handles, and its water of condensation is got back to the electrodialysis system that carries out step (1) in the ammonium nitrate wastewater and handled, and liquid concentrator is transformed into solid salt through cooling off after centrifugal.
The dense water of said step (1) gets into after vapo(u)rization system handles, and water of condensation is back to step (1) again to carry out electrodialysis system and handle, and liquid concentrator is transformed into solid salt through cooling off after centrifugal.
The dense water of step (2) is back to step (1), and system handles with electrodialysis (ED).
The membrane module material that electrodialysis system adopts is selected from Vestolen PP 7052, pvdf, SE, resin.
The membrane module that nanofiltration system adopts is a rolled membrane module, and mould material is selected from polymeric amide, polysulfones, polyethersulfone.
Because adopt technique scheme, technology of the present invention has following technique effect:
1, process combination is reasonable.At first adopt electrodialysis process among the present invention; Between electrodialysis system, nanofiltration system, EDI system, carry out internal recycle according to the size of ammonia nitrogen concentration and handle waste water; Electrodialytic technique carries out the inorganic salt in the waste water desalination and concentrates, and has higher penetration speed and desalting performance.One reuse of the water outlet of whole technology, one advances vapo(u)rization system, realizes waste water recycling and zero release.
2, reduce investment and running cost.For the water resources in the waste water, utilize membrane separation technique to separate energy-conservation characteristics such as efficient, normal temperature operation, no phase transformation, the water in the waste water through reuse behind the film, most inorganic salt and rejection to organics in dense water side.Thereby reduce investment and running cost.When accomplishing cleaner production, reduce investment and running cost as far as possible.
3, the ammonium salt in the waste water is handled in good time, turned waste into wealth, externally zero release.For the ammonium salt in the waste water, in order to prevent secondary pollution, at waste water after electrodialysis process; Directly adopt vapo(u)rization system to handle to its dense water that contains the high density ammonium salt; The evaporation condensed water that contains the part ammonia nitrogen gets into step (1) again and concentrates, and liquid concentrator is transformed into solid salt through cooling off after centrifugal, reclaims and takes out as sub product; Promptly become nitrogenous fertilizer to ammoniated wastewater and take out, produce economic benefit, environmental benefit and social benefit.Dense water after the nanofiltration is back to electrodialytic influent side again handles, realize external wastewater zero discharge and collect ammonium salt to greatest extent.
Description of drawings
Fig. 1 handles the schema of reuse technology for ammonium nitrate wastewater of the present invention.
Embodiment
Get into the ammonium nitrate wastewater of technology of the present invention, preferably carry out pre-treatment earlier, said pre-treatment can be adopted the traditional treatment method to ammonium nitrate wastewater--and-neutralization and filtration make waste water carry out handling early stage to following index: CODcr: < 30mg/>l; The content of suspended solids: below 10 mg/l; PH:5-7; < 35 ℃ of temperature.Above-mentioned parameter also can be adjusted according to the needs of subsequent disposal.
With reference to accompanying drawing, the ammonium nitrate wastewater that gets into technology of the present invention is carried out the processing of step (1) earlier: with electrodialysis system ammonium nitrate wastewater is handled, electrodialysis system produces water and carries out the processing of step (2), and dense water gets into vapo(u)rization system; Electrodialytic pH value is controlled between the 5-7, handles ammonia nitrogen concentration≤0.1% (mass percent) that water is produced in the back, the ammonia nitrogen concentration of dense water>=10% (mass percent); Above-mentioned parameter also can be adjusted according to the characteristics of system and the needs of subsequent disposal.The membrane module material that electrodialysis system adopts is selected from Vestolen PP 7052, pvdf, SE, resin etc.
(2), the product water of step (1) is handled with nanofiltration system, most salinities and organism are removed in nanofiltration (NF), and the product water after handling through nanofiltration system is delivered to step (3), and dense water returns step (1) intakes as electrodialysis; The product water ammonia nitrogen concentration≤20ppm of nanofiltration system, the recovery reaches more than 70%, dense water ammonia nitrogen concentration>=0.5%; Above-mentioned parameter also can be adjusted according to the characteristics of system and the needs of subsequent disposal.The membrane module that nanofiltration system adopts can adopt rolled membrane module, and mould material is selected from polymeric amide, polysulfones, polyethersulfone.
(3), the product water of step (2) is handled with the EDI system, the EDI system can with produce the water ammonia nitrogen concentration handle to 5mg/L, this product water is delivered to and is used the water spot reuse, the recovery reaches more than 90%.And dense water ammonia nitrogen concentration >=50mg/L delivers to step (2) and carries out the nanofiltration system processing again.
Adopt above different methods to make up stage by stage and step by step progressively with the ammonia nitrogen removal in the ammonium nitrate wastewater; Further; Three treatment step ammonia nitrogens that are employed in this embodiment reclaim proportional distribution; Can give full play to the advantage of each processing mode, raise the efficiency reduction running cost.
The dense water of said step (1) gets into after vapo(u)rization system handles, and the water of condensation reuse gets into step (1) and concentrates, and liquid concentrator is transformed into solid salt through cooling off after centrifugal.
Below above-mentioned treatment system is done further description:
1, electrodialysis (ED) system
Electrodialysis is that a kind of selection perviousness of utilizing film is separated with neutral species the charged ionogen in the water and reached desalination, a kind of membrane separation plant of intended purposes such as concentrates.The major parts of electrodialyzer is yin, yang ion-exchange membrane, dividing plate and electrode three parts.The compartment that dividing plate constitutes is the passage of liquid flow process.The compartment of material process is a desalting chamber, and the compartment of dense water process is the concentration compartments.Under the effect of DC electric field, utilize the selection perviousness of ion-exchange membrane, the cation permeation anode membrane, negatively charged ion sees through cavity block, and the ion of desalting chamber moves to the concentration compartments, and the ion of concentration compartments can't move to desalting chamber owing to the selection perviousness of film.The salt concentration of light like this chamber reduces gradually, and the salt concentration of adjacent concentration compartments is corresponding to raise gradually.Promptly in the waste water inorganic salinity carry out desalination or concentrate.
2, nanofiltration (NF) system
Waste water recycling is a kind of environmentally friendly water technology--nanofiltration than gordian technique in this technology, utilizes the experience of application of membrane separation technology in the waste water recycling project for many years, and the nf membrane of selection has higher penetration speed and desalting performance.The nf membrane element that this system adopts, characteristics such as have the ratio of desalinization height, penetration speed is fast, physical strength good, antifouling property is good, its advantage is:
1), this kind membrane element is through increasing the sheet number of film bag, shortens the length of inlet conduit, increases the width of water inlet filter, not only has higher water flux, and can reduce organism and mikrobe in the absorption on film surface, has stronger anti-pollution ability.
2), through to the improvement of mould material, created and had excellent chemical physical stability, weather resistance and the high yield water yield and the membrane element of high desalination performance.
3), membrane surface is more smooth, anti-pollution more, diaphragm-operated electric charge property is more suitable in handling metallurgical waste water.
3, electrodeionization (EDI) system
Electrodeionization is to have combined electrodialysis and two technology of IX characteristics and new technology growing up separately; Compare with the common electrical dialysis; Owing to filled ion exchange resin in the light chamber, improved intermembranous electroconductibility greatly, significantly strengthened by the ion migration of solution to face; Destroy the poor phenomenon of ion in the face concentration retention layer, improved limit current density; Compare with the conventional ion exchange; Because intermembranous high electrical potential gradient, forcing water decomposition is H+ and OH-, and H+ and OH-participate in load current on the one hand; Can play in-place regeneration to resin again on the other hand; Therefore EDI need not regenerate to resin, can save the necessary soda acid basin of IX, has reduced environmental pollution yet.
Therefore electrodeionization ultrapure water system has following advantage:
(1) the ion exchange resin consumption is few, is merely about 5% of IE method.
(2) do not need regeneration, reduced labour intensity, saved soda acid and a large amount of cleaning water, reduced environmental pollution.
(3) level of automation is high, easy care.
(4) triangular web continuous operation does not need redundant system.
Claims (7)
1. the technology of film combined method treatment of nitric acid ammonium waste water is characterized in that it carries out the processing of following steps to ammonium nitrate wastewater:
(1): system handles with electrodialysis (ED), and electrodialysis system produces water and carries out the processing of step (2), and dense water gets into vapo(u)rization system;
(2), the product water of step (1) is handled, the product water after handling through nanofiltration system is delivered to the processing of step (3), and dense water is back to step (1) and handles with nanofiltration (NF) system;
(3), the product water of step (2) is handled, deliver to through the product water after the EDI system handles and use water spot reuse, dense water to be back to step (2) to carry out the nanofiltration system processing again with electrodeionization (EDI) system.
2. the technology of film combined method treatment of nitric acid ammonium waste water as claimed in claim 1 is characterized in that also ammonium nitrate wastewater being carried out handling early stage to following index: CODcr in that step (1) is preceding: < 30mg/>l; The content of suspended solids: below 10 mg/l; PH:5-7; < 35 ℃ of temperature.
3. the technology of film combined method treatment of nitric acid ammonium waste water as claimed in claim 1; It is characterized in that in step (1); Electrodialytic water inlet pH value is controlled between the 5-7, handles ammonia nitrogen concentration≤0.1% (mass percent) that water is produced in the back, the ammonia nitrogen concentration of dense water>=10% (mass percent); In step (2), the product water ammonia nitrogen concentration≤20ppm of nanofiltration system, dense water ammonia nitrogen concentration>=0.5%; In step (3), the product water ammonia nitrogen concentration of EDI system<5mg/L, dense water ammonia nitrogen concentration>=50mg/L.
4. like the technology of claim 1,2 or 3 described film combined method treatment of nitric acid ammonium waste water; The dense water that it is characterized in that said step (1) gets into the vapo(u)rization system processing; Its water of condensation is got back to the electrodialysis system that carries out step (1) in the ammonium nitrate wastewater and is handled, and liquid concentrator is transformed into solid salt through cooling off after centrifugal.
5. like the technology of claim 1,2 or 3 described film combined method treatment of nitric acid ammonium waste water, it is characterized in that the dense water of step (2) is back to step (1), system handles with electrodialysis (ED).
6. the technology of film combined method treatment of nitric acid ammonium waste water as claimed in claim 1 is characterized in that the membrane module material that electrodialysis system adopts is selected from Vestolen PP 7052, pvdf, SE, resin.
7. the technology of film combined method treatment of nitric acid ammonium waste water as claimed in claim 1 is characterized in that the membrane module that nanofiltration system adopts is a rolled membrane module, and mould material is selected from polymeric amide, polysulfones, polyethersulfone.
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| CN201210207120XA CN102701343A (en) | 2012-06-19 | 2012-06-19 | Process for treating ammonium nitrate wastewater according to membrane combination method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771642A (en) * | 2014-01-09 | 2014-05-07 | 杭州蓝然环境技术有限公司 | Recycling method for saponified ammonium-sulfate wastewater in rare soil |
| CN104556314A (en) * | 2013-10-23 | 2015-04-29 | 苏州华清水处理技术有限公司 | Electrical deionization device for concentration during recycling of low-concentration ammonia-nitrogen wastewater |
| CN105110538A (en) * | 2015-08-25 | 2015-12-02 | 杭州蓝然环境技术有限公司 | Zero discharging process for desulfurization wastewater |
| CN105939970A (en) * | 2013-11-25 | 2016-09-14 | 环境水矿物质公司 | System and mehtod for removing minerals from brine using electrodialyis |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003136065A (en) * | 2001-11-05 | 2003-05-13 | Kurita Water Ind Ltd | Treatment apparatus of boiler feed water |
| CN102010090A (en) * | 2010-11-12 | 2011-04-13 | 杭州蓝然环境技术有限公司 | Process for treating and recycling ammonia nitrogen wastewater |
-
2012
- 2012-06-19 CN CN201210207120XA patent/CN102701343A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003136065A (en) * | 2001-11-05 | 2003-05-13 | Kurita Water Ind Ltd | Treatment apparatus of boiler feed water |
| CN102010090A (en) * | 2010-11-12 | 2011-04-13 | 杭州蓝然环境技术有限公司 | Process for treating and recycling ammonia nitrogen wastewater |
Non-Patent Citations (2)
| Title |
|---|
| 王方等: "回收氨氮废水用水处理技术的研究进展", 《当代化工》 * |
| 王方等: "硝酸铵废水深度处理技术", 《工业用水与废水》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556314A (en) * | 2013-10-23 | 2015-04-29 | 苏州华清水处理技术有限公司 | Electrical deionization device for concentration during recycling of low-concentration ammonia-nitrogen wastewater |
| CN105939970A (en) * | 2013-11-25 | 2016-09-14 | 环境水矿物质公司 | System and mehtod for removing minerals from brine using electrodialyis |
| US10246357B2 (en) | 2013-11-25 | 2019-04-02 | Enviro Water Minerals Company, Inc. | System and methods for removing minerals from a brine using electrodialysis |
| CN105939970B (en) * | 2013-11-25 | 2020-06-05 | 环境水矿物质公司 | System and method for removing minerals from brine using electrodialysis |
| CN103771642A (en) * | 2014-01-09 | 2014-05-07 | 杭州蓝然环境技术有限公司 | Recycling method for saponified ammonium-sulfate wastewater in rare soil |
| CN105110538A (en) * | 2015-08-25 | 2015-12-02 | 杭州蓝然环境技术有限公司 | Zero discharging process for desulfurization wastewater |
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Application publication date: 20121003 |