CN107758960A - A kind of processing method of ammonia waste water - Google Patents
A kind of processing method of ammonia waste water Download PDFInfo
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- CN107758960A CN107758960A CN201710971137.5A CN201710971137A CN107758960A CN 107758960 A CN107758960 A CN 107758960A CN 201710971137 A CN201710971137 A CN 201710971137A CN 107758960 A CN107758960 A CN 107758960A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The present invention provides the processing method of ammonia-containing water, and this method is that sodium hydroxide and ammonia nitrogen reaction generation sodium salt and ammonia are added into ammonia-containing water, and is driven out of ammonia using vaporizing extract process；The ammonia taken off, is cooled down by heat exchanger, then becomes ammoniacal liquor with absorbing pure water；Pass through deamination film again through treated waste water, absorb ammonia nitrogen with acid and form very pure ammonium salt, the ammonium salt in acid solution can be recycled；Ammonia nitrogen completely it is up to standard after, the solution containing sodium salt is evaporated crystallization, and water vapour is passed through into stripped vapor of the stripper as next group waste water, and reclaim evaporative crystallization out sodium salt.
Description
Technical field
The present invention relates to a kind of recovery technology of ammonia nitrogen, particularly a kind of stripping-deamination film combination method recovery ammonia-containing water
Technique.
Background technology
The content of ammonia root or ammonia is very high in many industrial wastewaters, if these direct discharging of waste water into natural water,
The content severe overweight of Water can be caused, causes eutrophication, destroys the ecological balance of water environment；If ammonia is directly released
It is put into air, air can be polluted again and cause secondary pollution, health is caused to seriously endanger.
At present, the recycling technology of ammonia is also immature in industrial wastewater, processing cost height be present, power consumption is big, returns
The problems such as yield is low, effluent quality does not reach national standard.
Ammonia still process method one-time investment is too big, operating cost is again high.Acid solution absorption process effectively can shift ammonia so as to go
Remove, but occupation area of equipment is big, operating cost is high, easily produces secondary pollution.Chinese invention patent CN101264948 is provided
A kind of ammonia nitrogen waste water emission reduction and ammonia nitrogen resource utilization device and method, deamination apparatus is stripped by two-stage and obtains ammonia, then
Ammonia is made by ammoniacal liquor or ammonium salt by one-level ammonia nitrogen reuse means.This method is effectively utilized the ammonia nitrogen in waste water, but
It is after long-term use, incrustation scale is also easy to produce in device and pipeline.
Ammonolysis craft is nitrogen and hydrogen by catalysis decomposition by combustion, and pollution is reduced, but equipment investment is high, the more difficult control of technique
System, ammonia can not reclaim again, cause the wasting of resources.
Chinese invention patent CN103979703.A provides a kind of ammonia recovery system, is catalyzed by the dialysis of ammonia dialysis module
Later raw water obtains ammonium sulfate, then it is ammonia to convert ammonium sulfate by the second catalyst.Membrane separation process can reclaim ammonia system
Into ammoniacal liquor, there is good environmental benefit, and technological process is simple, it is easy to maintenance.But the ammonia concn that recovery obtains is low,
Film vulnerable to pollution, membrane module change frequent, technological process input cost height, and later maintenance is costly.
Film deamination technique has that reduced investment, operating cost are low, take up an area less, environmentally safe, ammonia nitrogen is by being absorbed as sulphur
The advantages that sour ammonium or ammoniacal liquor reuse, non-scaling, clearance can almost reach 100%, operation maintenance simplicity, therefore application prospect
It is boundless, can for a long time at home high ammonia-nitrogen wastewater processing in large-scale application.This method is by stripping and deamination film combination
Manage ammonia-containing water, both eliminated the ammonia nitrogen in ammonia-containing water, and made up to discharge standard, reclaimed again the very high ammoniacal liquor of purity,
Ammonium salt and sodium salt.In addition, steam caused by evaporative crystallization catches up with ammonia for stripper, cost is greatly reduced.
The content of the invention
The present invention by vaporizing extract process and the combination of film deamination in ammonia nitrogen recovery technology, overcome above-mentioned Ammonia recovery cost it is high,
The problems such as recovering effect is poor, effluent quality does not reach standard.
The technical scheme for realizing the object of the invention is that sodium hydroxide and ammonia nitrogen reaction generation sodium salt are added into ammonia-containing water
And ammonia, and driven out of ammonia using vaporizing extract process；The ammonia taken off, is cooled down by heat exchanger, then becomes ammonification with absorbing pure water
Water；Pass through deamination film again through treated waste water, absorb ammonia nitrogen with acid and form very pure ammonium salt, the ammonium salt in acid solution can
To be recycled；Ammonia nitrogen completely it is up to standard after, the solution containing sodium salt is evaporated crystallization, using water vapour be passed through stripper as
The stripped vapor of next group waste water, and reclaim the sodium salt that evaporative crystallization comes out.
The processing method of ammonia waste liquid of the present invention comprises the following steps：
(1) pre-process：Ammonia-containing water, first carry out precipitating-pH adjustment-filtering, remove solid suspension, glue in water
Body, organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), sodium hydroxide is added, ammonia and sodium are produced with waste water reaction
Salt, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is prepared with absorbing pure water
The ammoniacal liquor that concentration is 20% is obtained, collects waste water after stripping；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through into deamination film by deamination film, ammonia, absorbed with acid
Obtain ammonium salt and reclaim, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium salt, evaporative crystallization mistake through evaporative crystallization
Caused vapor is passed through the processing that stripper is used for next group waste water in journey.
The processing method of preferable ammonia-containing water of the present invention is that pH adjusting ranges are 6.5-7.5, and processing load is 2
Ton day.
The processing method of preferable ammonia-containing water of the present invention is that the concentration of sodium hydroxide is saturation or close to saturation.
The processing method of preferable ammonia-containing water of the present invention be in step (1) ammonia-containing water be ammonium nitrate wastewater or
One or more in ammonium sulfate waste water or ammonium chloride waste-water.
Micro ammonia nitrogen is comprised only in waste water after step (2) deamination, the clearance of ammonia nitrogen is more than 99%, in waste water
The content of ammonia nitrogen is down to 400mg/L or so.
The processing method of preferable ammonia-containing water of the present invention is that the processing load of step (3) film deamination process is 2
Ton/8 hours/day, the acid according to used in water are nitric acid or sulfuric acid or hydrochloric acid, and preparation-obtained ammonium salt concentration is 25%.Deamination
Ammonia-nitrogen content is down to ＜ 5mg/L after film deamination.
Caused vapor is passed through stripper for next in preferable step (4) evaporation and crystal process of the present invention
Criticize the processing of waste water
The processing method of preferable ammonia-containing water of the present invention is step (3) deamination film 10% hydrochloric acid and 10%
Sodium hydroxide regenerated.
The present invention also provides method that is a kind of while preparing ammoniacal liquor and sodium nitrate, and this method comprises the following steps：
1) pre-process：Ammonia waste water containing nitric acid, first carry out precipitating-pH adjustment-filtering, remove solid suspension in water,
Colloid, organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), the ammonium nitrate reaction life added in sodium hydroxide, with waste water
Ammonia and sodium nitrate are produced, is driven out of ammonia using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is used
The ammoniacal liquor that concentration is 20% is prepared in absorbing pure water, collects waste water after stripping；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, inhaled with nitric acid by deamination film, ammonia
Receipts obtain ammonium nitrate solution and reclaimed, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium nitrate, evaporative crystallization through evaporative crystallization
During caused vapor be passed through stripper be used for next group waste water processing.
The present invention also provides method that is a kind of while preparing ammoniacal liquor and sodium sulphate, and this method comprises the following steps：
1) pre-process：Sulfur acid ammonia waste water, first carry out precipitating-pH adjustment-filtering, remove solid suspension in water,
Colloid, organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), the ammonium sulfate reaction life added in sodium hydroxide, with waste water
Ammonia and sodium sulphate are produced, is driven out of ammonia using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is used
The ammoniacal liquor that concentration is 20% is prepared in absorbing pure water, collects waste water after stripping；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, inhaled with sulfuric acid by deamination film, ammonia
Receipts obtain ammonium sulfate and reclaimed, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium sulphate, evaporative crystallization through evaporative crystallization
During caused vapor be passed through stripper be used for next group waste water processing.
The present invention also provides method that is a kind of while preparing ammoniacal liquor and sodium chloride, and this method comprises the following steps：
1) pre-process：Chloride containing ammonia waste water, first carry out precipitating-pH adjustment-filtering, remove solid suspension in water,
Colloid, organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), sodium hydroxide is added, ammonia is produced with sal-ammoniac waste water reaction
Gas and sodium chloride, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then uses pure water
The ammoniacal liquor for being prepared that concentration is 20% is absorbed, collects waste water after stripping；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, inhaled with hydrochloric acid by deamination film, ammonia
Receipts obtain ammonium chloride solution and reclaimed, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium chloride, evaporative crystallization through evaporative crystallization
During caused vapor be passed through stripper be used for next group waste water processing.
A kind of technique of stripping provided by the present invention-deamination film combination method recovery ammonia-containing water, can be removed in waste water
Ammonia nitrogen, reach discharge standard, can prepare and reclaim ammoniacal liquor, ammonium salt and sodium salt, and produced by sodium salt solution evaporative crystallization
Vapor be passed through stripper and catch up with ammonia, greatly save cost.The present invention, which has, to economize on resources, and technological process is simple, takes up an area
Area is small, and cost of investment is low, deamination film replacement cycle length, at least can be with more than 3 years the advantages that.
Embodiment
The ammonium nitrate wastewater of embodiment 1 recovery ammonia, prepare sodium nitrate, ammoniacal liquor
(1) pre-process：Content 5000mg/L ammonium nitrate wastewater, first carry out precipitating-pH adjustment-filtering, remove in water
Solid suspension, colloid, organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), saturation sodium hydroxide is added, ammonia is produced with waste water reaction
And sodium nitrate, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is inhaled with pure water
Concentration is prepared as 20% ammoniacal liquor in receipts, waste water after collection stripping, and the content of ammonia nitrogen is 380mg/L in waste water；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, inhaled with nitric acid by deamination film, ammonia
Receive and obtain ammonium nitrate solution and the recovery that concentration is 25%.The content of ammonia nitrogen is 4mg/L in waste water through deamination film deamination, is collected
Film deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium nitrate, evaporative crystallization through evaporative crystallization
During caused vapor be passed through stripper be used for next group waste water processing.
Recovery utilization rate by whole technique ammonia is 99.92%.
The ammonium sulfate waste water of embodiment 2 recovery ammonia, prepare sodium sulphate, ammoniacal liquor
(1) pre-process：Content 4580mg/L ammonium sulfate waste water, first carry out precipitating-pH adjustment-filtering, remove in water
Solid suspension, colloid, organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), saturation sodium hydroxide is added, ammonia is produced with waste water reaction
And sodium sulphate, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is inhaled with pure water
Concentration is prepared as 20% ammoniacal liquor in receipts, waste water after collection stripping, and the content of ammonia nitrogen is 350mg/L in waste water；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, inhaled with sulfuric acid by deamination film, ammonia
Receive and obtain ammonium sulfate and the recovery that concentration is 25%.The content of ammonia nitrogen is 2mg/L in waste water through deamination film deamination, is collected
Film deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium sulphate, evaporative crystallization through evaporative crystallization
During caused vapor be passed through stripper be used for next group waste water processing.
Recovery utilization rate by whole technique ammonia is 99.96%.
The ammonium chloride waste-water of embodiment 3 recovery ammonia, prepare sodium chloride, ammoniacal liquor
(1) pre-process：Content 5110mg/L ammonium chloride waste-water, first carry out precipitating-pH adjustment-filtering, remove in water
Solid suspension, colloid, organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), saturation sodium hydroxide is added, ammonia is produced with waste water reaction
And sodium chloride, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is inhaled with pure water
Concentration is prepared as 20% ammoniacal liquor in receipts, waste water after collection stripping, and the content of ammonia nitrogen is 363mg/L in waste water；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, inhaled with sulfuric acid by deamination film, ammonia
Receive and obtain ammonium chloride solution and the recovery that concentration is 25%.The content of ammonia nitrogen is 1mg/L in waste water through deamination film deamination, is collected
Film deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium chloride, evaporative crystallization through evaporative crystallization
During caused vapor be passed through stripper be used for next group waste water processing.
Recovery utilization rate by whole technique ammonia is 99.98%.
Claims (9)
1. a kind of processing method of ammonia-containing water, it is characterised in that the processing method is contained using stripping-deamination film combination method recovery
Ammonia waste water, the processing method comprise the following steps：
(1) pre-process：Ammonia-containing water, first carry out precipitating-pH adjustment-filtering, remove the solid suspension in water, colloid, have
Machine thing etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), sodium hydroxide is added, ammonia and sodium salt are produced with waste water reaction,
Ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is prepared into absorbing pure water
To the ammoniacal liquor that concentration is 20%, waste water after stripping is collected；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through into deamination film by deamination film, ammonia, obtained with acid absorption
Ammonium salt simultaneously reclaims, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium salt through evaporative crystallization, in evaporation and crystal process
Caused vapor is passed through the processing that stripper is used for next group waste water.
2. the processing method of ammonia-containing water according to claim 1, it is characterised in that step (1) the pH adjusting ranges are
6.5-7.5, processing load are 2 ton days.
3. the processing method of ammonia-containing water according to claim 1, it is characterised in that step (2) described sodium hydroxide it is dense
Spend for saturation or close to saturation.
4. the processing method of the ammonia-containing water according to claim any one of 1-3, it is characterised in that step is given up in (1) containing ammonia
Water is the one or more in ammonium nitrate wastewater or ammonium sulfate waste water or ammonium chloride waste-water.
5. the processing method of ammonia-containing water according to claim 4, it is characterised in that acid used is according to next in step (3)
Wet concentration selects corresponding nitric acid, sulfuric acid or hydrochloric acid, and the ammonium salt concentration being prepared is 25%.
6. the processing method of ammonia-containing water according to claim 5, it is characterised in that step (3) deamination film with 10% salt
Acid and 10% sodium hydroxide are regenerated.
7. method that is a kind of while preparing ammoniacal liquor and sodium nitrate, it is characterised in that this method comprises the following steps：
1) pre-process：Ammonia waste water containing nitric acid, first carry out precipitating-pH adjustment-filtering, remove solid suspension in water, colloid,
Organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), the ammonium nitrate reaction production ammonia added in sodium hydroxide, with waste water
Gas and sodium salt, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then is inhaled with pure water
The ammoniacal liquor for being prepared that concentration is 20% is received, collects waste water after stripping；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, absorbed with nitric acid by deamination film, ammonia
To ammonium nitrate solution and reclaim, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium nitrate, evaporation and crystal process through evaporative crystallization
In caused vapor be passed through stripper be used for next group waste water processing.
8. method that is a kind of while preparing ammoniacal liquor and sodium sulphate, it is characterised in that this method comprises the following steps：
1) pre-process：Sulfur acid ammonia waste water, first carry out precipitating-pH adjustment-filtering, remove solid suspension in water, colloid,
Organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), the ammonium sulfate reaction production ammonia added in sodium hydroxide, with waste water
Gas and sodium sulphate, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then uses pure water
The ammoniacal liquor for being prepared that concentration is 20% is absorbed, collects waste water after stripping；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, obtained with sulfuric acid absorption by deamination film, ammonia
To ammonium sulfate and reclaim, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium sulphate, evaporation and crystal process through evaporative crystallization
In caused vapor be passed through stripper be used for next group waste water processing.
9. method that is a kind of while preparing ammoniacal liquor and sodium chloride, it is characterised in that this method comprises the following steps：
1) pre-process：Chloride containing ammonia waste water, first carry out precipitating-pH adjustment-filtering, remove solid suspension in water, colloid,
Organic matter etc., mitigate subsequent treatment load, obtain pretreated waste water；
(2) strip：To the pretreated waste water obtained by step (1), add sodium hydroxide, with sal-ammoniac waste water reaction produce ammonia and
Sodium chloride, ammonia is driven out of using vaporizing extract process, the ammonia taken off is cooled down by rectifying column by heat exchanger, then uses absorbing pure water
The ammoniacal liquor that concentration is 20% is prepared, collects waste water after stripping；
(3) film deamination：Waste water after stripping obtained by step (2) is passed through deamination film, obtained with absorption by Hydrochloric Acid by deamination film, ammonia
To ammonium chloride solution and reclaim, collection membrane deamination solution；
(4) post-process：By the film deamination solution obtained by step (3), reclaim to obtain sodium chloride, evaporation and crystal process through evaporative crystallization
In caused vapor be passed through stripper be used for next group waste water processing.
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Cited By (15)
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| CN108862323A (en) * | 2018-05-28 | 2018-11-23 | 湖南工业大学 | Sodium fluoride co-producing white carbon black is produced using ammonia nitrogen waste water fluorine silicon resource metaplasia with high salt |
| CN108862317A (en) * | 2018-05-28 | 2018-11-23 | 湖南工业大学 | Ammonia nitrogen waste water processing with high salt and fluorine silicon resource method of comprehensive utilization |
| CN109319976A (en) * | 2018-10-29 | 2019-02-12 | 江西铜鼓有色冶金化工有限责任公司 | A kind of technique using gaseous state film process ammonia nitrogen waste water |
| CN109399848A (en) * | 2018-10-19 | 2019-03-01 | 盐城迪赛诺制药有限公司 | A kind of process for treating high ammonia nitrogen waste water with high salt |
| CN109574351A (en) * | 2018-12-03 | 2019-04-05 | 中海油天津化工研究设计院有限公司 | Containing sour high ammonia nitrogen and high salt utilization of wastewater resource and Zero discharge treatment method |
| CN109607570A (en) * | 2018-12-30 | 2019-04-12 | 南京格洛特环境工程股份有限公司 | A kind of recycling treatment process of ammonium chloride abraum salt |
| CN109912078A (en) * | 2019-03-29 | 2019-06-21 | 福建工程学院 | A kind of air alkali cleaning ammonia nitrogen blowing-off device and method |
| CN110002474A (en) * | 2019-05-06 | 2019-07-12 | 澧县腾飞化工有限公司 | Ammonia recovery technique containing ammonium salt solution after a kind of purification of potassium nitrate crude product |
| CN111892222A (en) * | 2020-07-31 | 2020-11-06 | 龙蟒佰利联集团股份有限公司 | Ammonium sulfate wastewater recycling method |
| CN112125461A (en) * | 2020-09-29 | 2020-12-25 | 南京万德斯环保科技股份有限公司 | Comprehensive treatment system and method for high-concentration ammonia nitrogen wastewater |
| CN112645496A (en) * | 2020-12-30 | 2021-04-13 | 中山大学 | High ammonia-nitrogen wastewater treatment and resource recovery system |
| CN113620324A (en) * | 2021-08-03 | 2021-11-09 | 安徽亚格盛电子新材料有限公司 | Process for deamination of magnesium chloride hexammoniate using water vapour |
| CN113880314A (en) * | 2021-11-10 | 2022-01-04 | 广东工业大学 | Treatment method and treatment system for obtaining ammonia water from ammonia nitrogen wastewater |
| CN114477558A (en) * | 2022-03-03 | 2022-05-13 | 无锡中天固废处置有限公司 | Ammonia-removing treatment method for ammonia nitrogen wastewater |
| CN115385504A (en) * | 2022-08-20 | 2022-11-25 | 杭州豪腾科技有限公司 | Comprehensive utilization process and system for acid-base etching solution |
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