CN112062140A - Device for producing ammonium sulfate from dye sulfuric acid wastewater - Google Patents
Device for producing ammonium sulfate from dye sulfuric acid wastewater Download PDFInfo
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- CN112062140A CN112062140A CN202010837469.6A CN202010837469A CN112062140A CN 112062140 A CN112062140 A CN 112062140A CN 202010837469 A CN202010837469 A CN 202010837469A CN 112062140 A CN112062140 A CN 112062140A
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- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/242—Preparation from ammonia and sulfuric acid or sulfur trioxide
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Abstract
The invention relates to the technical field of dye wastewater treatment, in particular to a device for producing ammonium sulfate from dye sulfuric acid wastewater, which comprises a first decolorizing system, a neutralizing system, a second decolorizing system and a fine filtering system, wherein the neutralizing system comprises a neutralizing feed pump, a neutralizing pipeline reactor, a neutralizing cache tank, a neutralizing filter press pump, a neutralizing filter press and a neutralizing filter solution tank which are sequentially connected, and initial mother liquor water is decolorized by the first decolorizing system and then is conveyed into the neutralizing pipeline reactor through the neutralizing feed pump to be neutralized with liquid ammonia in the reactor; the neutralization filtrate tank is connected with the second decoloring system, the second decoloring system is connected with the fine filtering system, the fine filtering system is connected with the back-adjusting PH tank to be mixed with waste acid in the fine filtering system, and the back-adjusting PH tank is connected with the ammonium sulfate solution tank through an ammonium sulfate solution pump. The finished product of ammonium sulfate produced by the sulfuric acid wastewater treated by the method has excellent indexes such as whiteness and content, and the like, and completely meets the industrial production and use requirements of other industries.
Description
Technical Field
The invention relates to the technical field of dye wastewater treatment, in particular to a device for producing ammonium sulfate from dye sulfuric acid wastewater.
Background
As is well known, the dye sulfuric acid wastewater has the characteristics of strong acidity, complex components, more impurities, various organic impurities, large discharge amount, difficult degradation and the like, and can bring serious harm to the environment if directly discharged without treatment. The dye industry traditionally adopts lime to neutralize dye sulfuric acid wastewater, but a large amount of calcium sulfate waste residues containing organic matters are generated, and the subsequent harmless treatment of the waste residues still needs higher cost.
At present, the ideal treatment method of the dye sulfuric acid wastewater is to combine wastewater treatment and ammonium sulfate production to realize the treatment, reutilization and resource utilization of the wastewater. The ammonium sulfate produced by the sulfuric acid wastewater is divided into two parts, namely pretreatment and evaporation concentration crystallization. The activated carbon used in the pretreatment part usually contains iron and iron oxides due to the process problem of manufacturing the activated carbon, while the sulfuric acid wastewater reacts with the iron and the iron oxides to generate a large amount of iron ions in the decoloring process, and if the iron ions cannot be precipitated and separated in the subsequent ammonia adding neutralization process, a large amount of floccules are generated, so that a precise filter is easily blocked, and the difficulty is brought to the subsequent evaporation, concentration and crystallization.
Based on the consideration, the invention designs the device for producing the ammonium sulfate by using the dye sulfuric acid wastewater.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a device for producing ammonium sulfate from dye sulfuric acid wastewater, namely, after the dye sulfuric acid wastewater (comprising moderate-concentration sulfuric acid wastewater or high-concentration sulfuric acid wastewater supplemented with corresponding washing water and clear water) is subjected to decoloration, liquid ammonia neutralization and other treatments, the produced ammonium sulfate finished product has excellent indexes such as whiteness, content and the like, and completely meets the industrial production and use of other industries.
In order to realize the purpose of the invention, the invention adopts the technical scheme that:
the invention discloses a device for producing ammonium sulfate from dye sulfuric acid wastewater, which comprises a first decolorizing system, a neutralizing system, a second decolorizing system and a fine filtering system, wherein the neutralizing system comprises a neutralizing feed pump, a neutralizing pipeline reactor, a neutralizing cache tank, a neutralizing filter press pump, a neutralizing filter press and a neutralizing filter solution tank which are sequentially connected; the neutralization filtrate tank is connected with the second decoloring system, the second decoloring system is connected with the fine filtering system, the fine filtering system is connected with the back-adjusting PH tank to be mixed with waste acid in the fine filtering system, and the back-adjusting PH tank is connected with the ammonium sulfate solution tank through an ammonium sulfate solution pump.
The PH adjusting tank is of a structure with a hollow top provided with a cover plate, the inner cavity of the PH adjusting tank is divided into a left cavity and a right cavity by a baffle plate, waste acid is arranged in the right cavity, and the top of the PH adjusting tank is connected with the fine filtration system; an overflow port is arranged above the side wall of the baffle; a PH meter is adjusted back in the right chamber; the lower part of the inner wall of the left chamber is communicated with the inner cavity of the ammonium sulfate solution tank through the ammonium sulfate solution pump.
And a circulating pipeline is arranged on the outer wall of the PH adjusting-back groove, one end of the circulating pipeline is communicated with the lower part of the inner wall of the right cavity of the PH adjusting-back groove, the other end of the circulating pipeline is communicated with the top of the right cavity, and a circulating pump is arranged on the circulating pipeline.
The first decoloring system comprises a raw water filter press, a dewatering trough, a dewatering pump and a dewatering adsorption tower, wherein the raw water filter press is used for filter-pressing initial mother liquid water, a filtrate outlet of the raw water filter press is connected with an inner cavity of the dewatering trough, a dewatering inlet of the dewatering adsorption tower is communicated with the lower part of the inner wall of the dewatering trough through the dewatering pump, a dewatering outlet above the side wall of the dewatering adsorption tower is communicated with the inner cavity of the dewatering trough, and the lower part of the inner wall of the dewatering trough is communicated with the inner cavity of the neutralization pipeline reactor through the neutralization feed pump.
An acid adjusting groove is arranged between the first dewatering outlet and the PH adjusting groove, the top of an inner cavity of the acid adjusting groove is communicated with the first dewatering outlet, the lower part of the inner wall of the acid adjusting groove is communicated with the top of a right cavity of the PH adjusting groove through an adjusting pipeline, and an adjusting valve is arranged on the adjusting pipeline.
The second decoloring system comprises a second dewatering inlet pump, a second dewatering adsorption tower and a second dewatering water tank, wherein a second dewatering inlet of the second dewatering adsorption tower is communicated with the lower part of the inner wall of the neutralization filtrate tank through the second dewatering inlet pump, and a second dewatering feed flow meter is arranged between the second dewatering inlet pump and the second dewatering inlet; a second dewatering water gap above the side wall of the second dewatering adsorption tower is communicated with the top of the inner cavity of the second dewatering water tank; the fine filtration system comprises a fine filtration pump and a fine filter, a water inlet at the bottom of the fine filter is communicated with the lower part of the inner wall of the second dewatering tank through the fine filtration pump, and a fine filtration flowmeter is arranged between the water inlet of the fine filter and the fine filtration pump; and a water outlet above the side wall of the precision filter is communicated with the top of the right cavity of the PH adjusting-back tank, and a fine filtration PH meter and a fine filtration flowmeter are arranged on a pipeline between the precision filter and the right cavity.
And a neutralization flow meter is arranged between the neutralization feeding pump and the neutralization pipeline reactor.
The invention has the beneficial effects that:
1. in the invention, the pH value is controlled to be 7-8 in the neutralization reaction, so that most of iron ions in the mother liquor can be precipitated, the concentration of the iron ions in a concentration process system is very low, the shape of ammonium sulfate crystals in the concentration process is not influenced, the content of the iron ions in the finished ammonium sulfate product is low, and various indexes such as whiteness and content of the finished ammonium sulfate product are excellent, thus the ammonium sulfate product completely meets the industrial production and use of other industries.
2. According to the invention, after iron ions are precipitated, floccules are not generated in the whole system after the iron ions are subjected to pressure filtration by the neutralization pressure filter, the cleaning times of the precision filter are reduced, the labor intensity of workers is reduced, and the waste acid treatment efficiency is improved.
3. The acid adjusting tank is arranged, the pH value of decolored waste acid in the acid adjusting tank is adjusted to 3-4 in the process of adjusting the pH value back, the production cost is reduced, and the economic benefit of an enterprise is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of fig. 1.
In the attached drawings, 1, a raw water filter press; 2. a dewatering trough; 3. a dewatering water pump; 4. a dewatering water flow meter; 5. a desorption tower; 6. a dewatering inlet; 7. a water outlet; 8. an acid adjusting tank; 9. adjusting a valve; 10. a water-out tank; 11. a neutralization feed pump; 12. a neutralization flow meter; 13. a pipeline reactor; 14. a neutralization pH meter; 15. a neutralization cache slot; 16. a neutralization pressure filtration pump; 17. a neutralization filter press; 18. a neutralization filtrate tank; 19. a second dewatering water pump; 20. a second stripping feed flow meter; 21. a second desorption tower; 22. a second dewatering inlet; 23. a second water outlet; 24. a second water removal tank; 25. a precision filter pump; 26. a precision filtration flow meter; 27. a precision filter; 28. finely filtering a PH meter; 29. fine filtering the flowmeter; 30. adjusting back the pH tank; 30. a baffle plate; 31. a circulation pump; 32. the pH meter is adjusted back; 33. a baffle plate; 34. an ammonium sulfate solution pump; 35. an ammonium sulfate solution tank; 100. a first decolorizing system; 200. a neutralization system; 300. a second decolorizing system; 400. a fine filtration system.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
see fig. 1-2.
The invention discloses a device for producing ammonium sulfate from dye sulfuric acid wastewater, which comprises a first decolorizing system 100, a neutralizing system 200, a second decolorizing system 300 and a fine filtering system 400, wherein the neutralizing system 200 comprises a neutralizing feed pump 11, a neutralizing pipeline reactor 13, a neutralizing cache tank 15, a neutralizing pressure filter pump 16, a neutralizing pressure filter 17 and a neutralizing filtrate tank 18 which are sequentially connected, initial mother liquor is decolorized by the first decolorizing system 100 and then is conveyed into the neutralizing pipeline reactor 13 through the neutralizing feed pump 11 to be neutralized with liquid ammonia in the neutralizing pipeline reactor 13, and a neutralizing pH meter 14 is arranged in the neutralizing pipeline reactor 13; the neutralization filtrate tank 18 is connected with the second decolorizing system 300, the second decolorizing system 300 is connected with the fine filtration system 400, the fine filtration system 400 is connected with the pH adjusting-back tank 30 to mix with waste acid in the fine filtration system, the pH adjusting-back tank 30 is connected with the ammonium sulfate solution tank 35 through the ammonium sulfate solution pump 34, and after iron ions are precipitated and separated out, the waste acid is subjected to pressure filtration through the neutralization pressure filter 17, so that no floccule is generated in the whole system, the cleaning times of the precision filter are reduced, the labor intensity of workers is reduced, and the waste acid treatment efficiency is improved; the pH value is controlled to be 7-8 in the neutralization reaction, most of iron ions in the mother liquor can be separated out by precipitation, the concentration of the iron ions in a concentration process system is very low, the shape of ammonium sulfate crystals in the concentration process is not influenced, the content of the iron ions in an ammonium sulfate finished product is low, and various indexes such as whiteness and content of the ammonium sulfate finished product are excellent, so that the ammonium sulfate finished product can completely meet the industrial production and use requirements of other industries.
The PH adjusting tank 30 is of a structure with a hollow top provided with a cover plate, the inner cavity of the PH adjusting tank is divided into a left cavity and a right cavity by a baffle plate 33, waste acid is arranged in the right cavity, and the top of the PH adjusting tank is connected with the fine filtration system 400; an overflow port is arranged above the side wall of the baffle 33; a PH meter 32 is adjusted back in the right chamber; the lower part of the inner wall of the left chamber is communicated with the inner cavity of the ammonium sulfate solution tank 35 through the ammonium sulfate solution pump 34.
And a circulating pipeline is arranged on the outer wall of the PH adjusting-back groove 30, one end of the circulating pipeline is communicated with the lower part of the inner wall of the right chamber of the PH adjusting-back groove 30, the other end of the circulating pipeline is communicated with the top of the right chamber, and a circulating pump 31 is arranged on the circulating pipeline.
The first decoloring system 100 comprises a raw water filter press 1, a dewatering trough 2, a dewatering pump 3 and a dewatering adsorption tower 5, wherein the raw water filter press 1 is used for filter-pressing initial mother liquid water, a filtrate outlet of the raw water filter press is connected with an inner cavity of the dewatering trough 2, a dewatering inlet 6 of the dewatering adsorption tower 5 is communicated with the lower part of the inner wall of the dewatering trough 2 through the dewatering pump 3, a dewatering outlet 7 above the side wall of the dewatering adsorption tower 5 is communicated with the inner cavity of the dewatering trough 10, and the lower part of the inner wall of the dewatering trough 10 is communicated with the inner cavity of the neutralization pipeline reactor 13 through the neutralization feed pump 11.
An acid adjusting groove 8 is arranged between the first dewatering nozzle 7 and the back-adjusting PH groove 30, the top of an inner cavity of the acid adjusting groove 8 is communicated with the first dewatering nozzle 7, the lower portion of the inner wall of the acid adjusting groove is communicated with the top of a right cavity of the back-adjusting PH groove 30 through an adjusting pipeline, an adjusting valve 9 is arranged on the adjusting pipeline, and the decolored waste acid of the acid adjusting groove 8 is used for adjusting the pH value to 3-4 in the back-adjusting PH process, so that the production cost is reduced, and the economic benefit of an enterprise is improved.
The second decoloring system 300 comprises a second dewatering inlet pump 19, a second dewatering adsorption tower 21 and a second dewatering water tank 24, wherein a second dewatering inlet 22 of the second dewatering adsorption tower 21 is communicated with the lower part of the inner wall of the neutralization filtrate tank 18 through the second dewatering inlet pump 19, and a second dewatering inlet flow meter 20 is arranged between the second dewatering inlet pump 19 and the second dewatering inlet 22; a second dewatering water gap 23 above the side wall of the second dewatering adsorption tower 21 is communicated with the top of the inner cavity of the second dewatering water tank 24; the fine filtration system 400 comprises a fine filtration pump 25 and a fine filter 27, wherein a water inlet at the bottom of the fine filter 27 is communicated with the lower part of the inner wall of the second dewatering tank 24 through the fine filtration pump 25, and a fine filtration flowmeter 26 is arranged between the water inlet of the fine filter 27 and the fine filtration pump 25; and a water outlet above the side wall of the precision filter 27 is communicated with the top of the right chamber of the PH adjusting-back tank 30, and a fine filtration PH meter 28 and a fine filtration flowmeter 29 are arranged on a pipeline between the precision filter and the PH adjusting-back tank.
A neutralization flow meter 12 is arranged between the neutralization feed pump 11 and the neutralization pipeline reactor 13.
The working process is as follows: the initial mother liquor is squeezed by a raw water filter press 1, and the filtrate is collected by a dewatering water tank 2. A water removal groove 2 continuously enters a desorption tower 5 from a water removal inlet 6 at the bottom of the desorption tower 5 through a water removal pump 3 and a water removal flow meter 4, and decolorized filtrate respectively enters a water removal groove 10 and an acid adjusting groove 8 from a water removal inlet 7 at the upper part of the desorption tower 5. A water removal tank 10 continuously enters a neutralization pipeline reactor 13 for neutralization reaction with liquid ammonia through a neutralization feeding pump 11 and a neutralization flowmeter 12, the neutralization reactor is provided with a neutralization PH meter 14, PH 7-8 is controlled, iron ions are generated into precipitates, neutralized mother liquor enters a neutralization buffer tank 15, the neutralization buffer tank 15 is pumped into a neutralization filter press 17 through a neutralization filter press pump 16, filtrate is collected by a neutralization filtrate tank 18, the neutralization filtrate tank 18 continuously enters a secondary desorption tower 21 from a secondary desorption water inlet 22 at the bottom of the secondary desorption tower 21 for secondary decolorization through a secondary desorption water inlet 23 at the upper part of the secondary desorption tower 21 and flows out through a secondary desorption water inlet 23, the filtrate enters a secondary water removal tank 24, the secondary water removal tank 24 continuously enters a precision filter 27 from the bottom of the precision filter 27 through a precision filter pump 25 and a precision filter flowmeter 26, filtrate flows into a back-up pH groove 30 from a water outlet at the upper part of a precision filter 27, a fine filtration PH meter 28, a fine filtration flowmeter 29 and an acid adjusting groove 8 are arranged on a water outlet pipeline of the fine filtration PH meter, waste acid decolorized by a desorption tower 5 is dripped into the back-up pH groove 30 through a DCS system by automatically controlling an adjusting valve 9 according to the PH value of the fine filtration PH meter 28 and the flow of the fine filtration flowmeter 29. The mixture was mixed in the pH-adjusted tank 30. The adjusting-back pH tank 30 is provided with a circulating pump 31 to ensure uniform mixing, an adjusting-back pH meter 32 is arranged on the adjusting-back pH tank 30, the adjusting-back pH tank 30 is separated by a baffle 33, the adjusting-back pH tank is divided into a left half and a right half, an overflow hole is arranged on the baffle 33, and after the uniform mixing and the pH value reach 3-4 requirements, the adjusting-back pH tank 30 overflows to the other half of the adjusting-back pH tank 30 and is pumped into an ammonium sulfate solution tank 35 for later use through an ammonium sulfate solution.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (7)
1. The utility model provides a dyestuff sulphuric acid waste water production ammonium sulfate device which characterized in that: the system comprises a first decoloring system (100), a neutralization system (200), a second decoloring system (300) and a fine filtration system (400), wherein the neutralization system (200) comprises a neutralization feed pump (11), a neutralization pipeline reactor (13), a neutralization buffer tank (15), a neutralization filter-press pump (16), a neutralization filter-press (17) and a neutralization filtrate tank (18) which are sequentially connected, initial mother liquor water is decolored by the first decoloring system (100) and then is conveyed into the neutralization pipeline reactor (13) through the neutralization feed pump (11) to be neutralized with liquid ammonia in the neutralization pipeline reactor (13), and a neutralization pH meter (14) is arranged in the neutralization pipeline reactor (13); the neutralization filtrate tank (18) is connected with the second decolorizing system (300), the second decolorizing system (300) is connected with the fine filtration system (400), the fine filtration system (400) is connected with the back-adjusting PH tank (30) to be mixed with waste acid in the fine filtration system, and the back-adjusting PH tank (30) is connected with the ammonium sulfate solution tank (35) through an ammonium sulfate solution pump (34).
2. The device for producing ammonium sulfate from dye sulfuric acid wastewater as claimed in claim 1, wherein: the PH adjusting tank (30) is of a structure with a hollow top provided with a cover plate, the inner cavity of the PH adjusting tank is divided into a left cavity and a right cavity by a baffle plate (33), waste acid is arranged in the right cavity, and the top of the PH adjusting tank is connected with the fine filtration system (400); an overflow port is arranged above the side wall of the baffle (33); a PH meter (32) is arranged in the right chamber; the lower part of the inner wall of the left chamber is communicated with the inner cavity of the ammonium sulfate solution tank (35) through the ammonium sulfate solution pump (34).
3. The device for producing ammonium sulfate from dye sulfuric acid wastewater as claimed in claim 2, wherein: and a circulating pipeline is arranged on the outer wall of the PH adjusting-back tank (30), one end of the circulating pipeline is communicated with the lower part of the inner wall of the right chamber of the PH adjusting-back tank (30), the other end of the circulating pipeline is communicated with the top of the right chamber, and a circulating pump (31) is arranged on the circulating pipeline.
4. The device for producing ammonium sulfate from dye sulfuric acid wastewater as claimed in claim 3, wherein: first decoloration system (100) include raw water pressure filter (1), one take off intake chamber (2), one take off intake pump (3), one take off adsorption tower (5), raw water pressure filter (1) is used for the initial mother liquor water of filter-pressing, its filtrating export with one take off the inner chamber of intake chamber (2) and link to each other, one take off intake port (6) of adsorption tower (5) through one take off intake pump (3) with one take off the inner wall below intercommunication of intake chamber (2), one take off one of adsorption tower (5) lateral wall top deviate from mouth of a river (7) with one deviate from the inner chamber intercommunication of basin (10), one deviate from the inner wall below of basin (10) through neutralization charge pump (11) with the inner chamber intercommunication of neutralization pipeline reactor (13).
5. The device for producing ammonium sulfate from dye sulfuric acid wastewater as claimed in claim 4, wherein: an acid adjusting groove (8) is arranged between the first dewatering outlet (7) and the PH adjusting groove (30), the top of an inner cavity of the acid adjusting groove (8) is communicated with the first dewatering outlet (7), the lower part of the inner wall of the acid adjusting groove is communicated with the top of a right cavity of the PH adjusting groove (30) through an adjusting pipeline, and an adjusting valve (9) is arranged on the adjusting pipeline.
6. The device for producing ammonium sulfate from dye sulfuric acid wastewater as claimed in claim 5, wherein: the second decoloring system (300) comprises a second desorption water pump (19), a second desorption tower (21) and a second desorption water tank (24), a second desorption water inlet (22) of the second desorption tower (21) is communicated with the lower part of the inner wall of the neutralization filtrate tank (18) through the second desorption water pump (19), and a second desorption feed flow meter (20) is arranged between the second desorption water pump (19) and the second desorption water inlet (22); a second dewatering water gap (23) above the side wall of the second dewatering adsorption tower (21) is communicated with the top of the inner cavity of the second dewatering water tank (24); the fine filtration system (400) comprises a fine filtration pump (25) and a fine filter (27), a water inlet at the bottom of the fine filter (27) is communicated with the lower part of the inner wall of the second dewatering tank (24) through the fine filtration pump (25), and a fine filtration flowmeter (26) is arranged between the water inlet of the fine filter (27) and the fine filtration pump (25); a water outlet above the side wall of the precision filter (27) is communicated with the top of the right chamber of the PH adjusting-back tank (30), and a fine filtration PH meter (28) and a fine filtration flowmeter (29) are arranged on a pipeline between the precision filter and the PH adjusting-back tank.
7. The device for producing ammonium sulfate from dye sulfuric acid wastewater as claimed in claim 1, wherein: a neutralization flow meter (12) is arranged between the neutralization feeding pump (11) and the neutralization pipeline reactor (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837469.6A CN112062140B (en) | 2020-08-19 | 2020-08-19 | Device for producing ammonium sulfate from dye sulfuric acid wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010837469.6A CN112062140B (en) | 2020-08-19 | 2020-08-19 | Device for producing ammonium sulfate from dye sulfuric acid wastewater |
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| CN112062140A true CN112062140A (en) | 2020-12-11 |
| CN112062140B CN112062140B (en) | 2023-01-20 |
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| CN102826673A (en) * | 2011-06-15 | 2012-12-19 | 浙江龙盛化工研究有限公司 | Cleaning treatment method of dying industrial acidic wastewater |
| CN103332821A (en) * | 2013-06-21 | 2013-10-02 | 浙江吉华集团股份有限公司 | Method for treating waste water containing sulfuric acid in production process of dyes and intermediates |
| CN107758936A (en) * | 2017-12-08 | 2018-03-06 | 济南大学 | A kind of organic waste-water treating apparatus containing ammonia and processing method |
| US20180127285A1 (en) * | 2013-12-04 | 2018-05-10 | Zhuangdou Zhang | Tannery Process With Effluent Recycling |
| CN108545760A (en) * | 2018-06-13 | 2018-09-18 | 环境保护部南京环境科学研究所 | The system and method for ammonium sulfate is recycled in a kind of spent acid from dye industry |
| CN109851127A (en) * | 2019-02-01 | 2019-06-07 | 山东世纪阳光科技有限公司 | A kind of processing method of large red-based g spent acid |
| CN110282800A (en) * | 2019-06-20 | 2019-09-27 | 四川省兴威钒业有限公司 | Vanadium extracting waste water ammonia nitrogen resource utilization technology |
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2020
- 2020-08-19 CN CN202010837469.6A patent/CN112062140B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826673A (en) * | 2011-06-15 | 2012-12-19 | 浙江龙盛化工研究有限公司 | Cleaning treatment method of dying industrial acidic wastewater |
| CN103332821A (en) * | 2013-06-21 | 2013-10-02 | 浙江吉华集团股份有限公司 | Method for treating waste water containing sulfuric acid in production process of dyes and intermediates |
| US20180127285A1 (en) * | 2013-12-04 | 2018-05-10 | Zhuangdou Zhang | Tannery Process With Effluent Recycling |
| CN107758936A (en) * | 2017-12-08 | 2018-03-06 | 济南大学 | A kind of organic waste-water treating apparatus containing ammonia and processing method |
| CN108545760A (en) * | 2018-06-13 | 2018-09-18 | 环境保护部南京环境科学研究所 | The system and method for ammonium sulfate is recycled in a kind of spent acid from dye industry |
| CN109851127A (en) * | 2019-02-01 | 2019-06-07 | 山东世纪阳光科技有限公司 | A kind of processing method of large red-based g spent acid |
| CN110282800A (en) * | 2019-06-20 | 2019-09-27 | 四川省兴威钒业有限公司 | Vanadium extracting waste water ammonia nitrogen resource utilization technology |
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