CN1086678C - Process for recovering ammonia from waste chemical water by digestion method - Google Patents
Process for recovering ammonia from waste chemical water by digestion method Download PDFInfo
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- CN1086678C CN1086678C CN99116665A CN99116665A CN1086678C CN 1086678 C CN1086678 C CN 1086678C CN 99116665 A CN99116665 A CN 99116665A CN 99116665 A CN99116665 A CN 99116665A CN 1086678 C CN1086678 C CN 1086678C
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- water
- ammonia
- evaporating kettle
- steam
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Abstract
The present invention discloses method for recovering ammonia from waste chemical water by a digestion method, which mainly adopts the steps of carrying out steam boiling on waste water containing ammonia in an evaporation pot under a definite vacuum degree and absorbing ammonia gas generated during steam boiling into ammonia water by water. The present invention has the advantages that the recovered ammonia water has good quality and the cost is low, and meanwhile the pollution to environment is relieved.
Description
The present invention relates to the method for ammonia in a kind of steam-digestion reclaim wastewater from chemical industry, particularly a kind of recovery produces 1, the method for ammonia in the waste water that produces during the 4-diamino-anthraquinone.
Producing 1, when the 4-diamino-anthraquinone carries out the ammonification processing, come the ammonification hydroxyl with a large amount of excess of ammonia water, reaction finishes back excess of ammonia water will be as discharge of wastewater, and general producer all does directly discharging of improvement, and environment has been caused serious pollution; The method that reclaims ammonia ground employing decolouring, sedimentation or filtration treatment commonly used, and very dark to chroma in waste water, containing the organism solid formation for a long time, this method recovering effect is bad.
The purpose of this invention is to provide a kind of can Ammonia-Containing Wastewater Treatment colourity height, it is many to contain the organism solid formation, recovering effect is good, does not alleviate the method for ammonia in the steam-digestion reclaim wastewater from chemical industry of environmental pollution.
The object of the present invention is achieved like this: a kind of steam-digestion reclaim produces 1, the method of ammonia in the waste water that the 4-diamino-anthraquinone produces, to produce 1, the waste water of ammoniated weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carry out boiling under 50-100 ℃ temperature, the pressure in the evaporating kettle is 92-760mmHg; When the raffinate liquid level in the evaporating kettle drops to the 20-40% of former liquid level, the steam that produces is absorbed through water-jet exhauster and by water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
The boiling temperature optimum temps is 70-80 ℃.Optimum pressure is 300-380mmHg in the evaporating kettle.
The method of ammonia in the steam-digestion reclaim wastewater from chemical industry provided by the invention takes boiling to handle to ammonia-containing water owing to adopt in evaporating kettle, and ammonia can be separated from organism and solid formation with comparalive ease, has reduced production cost; Reduced the quantity discharged of ammonia, alleviated pollution environment.
The invention will be further described below in conjunction with embodiment.
Embodiment one:
To produce 1, the waste water that contains ammonia weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carries out boiling under 50 ℃ temperature, and the pressure in the evaporating kettle is 92mmHg; When the raffinate liquid level in the evaporating kettle drop to former liquid level 20% the time, the steam that produces is absorbed through water-jet exhauster and by water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
Embodiment two:
To produce 1, the waste water that contains ammonia weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carries out boiling under 60 ℃ temperature, and the pressure in the evaporating kettle is 120mmHg; When the raffinate liquid level in the evaporating kettle drop to former liquid level 25% the time, the steam that produces is absorbed through water-jet exhauster and by water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
Embodiment three:
To produce 1, the waste water that contains ammonia weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carries out boiling under 70 ℃ temperature, and the pressure in the evaporating kettle is 300mmHg; When the raffinate liquid level in the evaporating kettle drop to former liquid level 30% the time, the steam that produces is absorbed through water-jet exhauster and by water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
Embodiment four:
To produce 1, the waste water that contains ammonia weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carries out boiling under 75 ℃ temperature, and the pressure in the evaporating kettle is 340mmHg; When the raffinate liquid level in the evaporating kettle drop to former liquid level 30% the time, the steam that produces is absorbed through water-jet exhauster and by water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
Embodiment five:
To produce 1, the waste water that contains ammonia weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carries out boiling under 80 ℃ temperature, and the pressure in the evaporating kettle is 380mmHg; When the raffinate liquid level in the evaporating kettle drop to former liquid level 30% the time, the steam that produces is absorbed through water-jet exhauster and by water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
Embodiment six:
To produce 1, the waste water that contains ammonia weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carries out boiling under 100 ℃ temperature, and the pressure in the evaporating kettle is 760mmHg; When the raffinate liquid level in the evaporating kettle drop to former liquid level 40% the time, the steam that produces is absorbed through water-jet exhauster quilt and water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
Claims (3)
1, a kind of steam-digestion reclaim produces 1, the method of ammonia in the waste water that the 4-diamino-anthraquinone produces, it is characterized in that and to produce 1, the waste water of ammoniated weight percent＜20% that produces during the 4-diamino-anthraquinone is extracted in the evaporating kettle by vacuum pump, carry out boiling under 50-100 ℃ temperature, the pressure in the evaporating kettle is 92-760mmHg; When the raffinate liquid level in the evaporating kettle drops to the 20-40% of former liquid level, the steam that produces is absorbed through water-jet exhauster and by water, hot ammoniacal liquor after the absorption returns storage tank after the water cooler cooling, it is 20% that the continuous circulation of ammoniacal liquor reaches the technic index weight percent until concentration.
2, steam-digestion reclaim according to claim 1 produces 1, and the method for ammonia is characterized in that boiling temperature is 70-80 ℃ in the waste water that the 4-diamino-anthraquinone produces.
3, steam-digestion reclaim according to claim 1 and 2 produces 1, the method for ammonia in the waste water that the 4-diamino-anthraquinone produces, and it is characterized in that: the evaporating kettle internal pressure is 300-380mmHg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116665A CN1086678C (en) | 1999-09-16 | 1999-09-16 | Process for recovering ammonia from waste chemical water by digestion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116665A CN1086678C (en) | 1999-09-16 | 1999-09-16 | Process for recovering ammonia from waste chemical water by digestion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1246442A CN1246442A (en) | 2000-03-08 |
| CN1086678C true CN1086678C (en) | 2002-06-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99116665A Expired - Fee Related CN1086678C (en) | 1999-09-16 | 1999-09-16 | Process for recovering ammonia from waste chemical water by digestion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1086678C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100482308C (en) * | 2006-06-15 | 2009-04-29 | 武汉理工大学 | Removal method and equipment for sucking ammonia nitrogen in waste water through negative pressure of vacuum |
| CN103570176B (en) * | 2013-11-01 | 2015-05-13 | 安徽金禾实业股份有限公司 | Method and device for processing waste water of chlorination workshop section in production of pyridinium |
| CN114262109A (en) * | 2021-11-03 | 2022-04-01 | 青川县青云上锰业有限公司 | Ammonia recovery method of low-concentration ammonium sulfate solution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160512A (en) * | 1992-01-13 | 1992-11-03 | Cleveland State University | Gas separation process |
| US5788844A (en) * | 1995-06-08 | 1998-08-04 | Henkel Corporation | Process for removing and recovering ammonia from organic metal extractant solutions in a liquid-liquid metal extraction process |
-
1999
- 1999-09-16 CN CN99116665A patent/CN1086678C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160512A (en) * | 1992-01-13 | 1992-11-03 | Cleveland State University | Gas separation process |
| US5788844A (en) * | 1995-06-08 | 1998-08-04 | Henkel Corporation | Process for removing and recovering ammonia from organic metal extractant solutions in a liquid-liquid metal extraction process |
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| Publication number | Publication date |
|---|---|
| CN1246442A (en) | 2000-03-08 |
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