CN112062140B - 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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- CN112062140B CN112062140B CN202010837469.6A CN202010837469A CN112062140B CN 112062140 B CN112062140 B CN 112062140B CN 202010837469 A CN202010837469 A CN 202010837469A CN 112062140 B CN112062140 B CN 112062140B
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- 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 decolorizing system, the second decolorizing system is connected with the fine filtering system, the fine filtering system is connected with the pH adjusting tank to be mixed with waste acid in the fine filtering system, and the pH adjusting 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, content and the like, and completely meets the industrial production and use 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 technical scheme adopted by the invention is as follows:
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 decolorizing system, the second decolorizing system is connected with the fine filtering system, the fine filtering system is connected with the pH adjusting tank to be mixed with waste acid in the fine filtering system, and the pH adjusting 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 back-off pH meter is arranged in the right cavity; 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 back-adjusting pH groove, one end of the circulating pipeline is communicated with the lower part of the inner wall of the right cavity of the back-adjusting pH 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 back-adjusting pH 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 back-adjusting pH 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; the second water removal port above the side wall of the second water removal adsorption tower is communicated with the top of the inner cavity of the second water removal 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 water removal 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 chamber of the pH adjusting-back tank, and a fine filtration pH meter and a fine filtration flowmeter are arranged on a pipeline between the water outlet and the top of the right chamber of the pH adjusting-back tank.
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 ensured to be 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, thus the ammonium sulfate neutralization reaction 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 filter pressing by the neutralization filter press, 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 invention is provided with the acid adjusting tank, and the pH value of decolored waste acid in the acid adjusting tank is adjusted to 3 to 4 in the pH adjustment process, so that the production cost is reduced, and the economic benefit of an enterprise is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is a partially enlarged view of fig. 1.
In the attached figure, 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 secondary stripping feeding 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 precise filter pump; 26. a precision filtration flowmeter; 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 tank 30 to mix with the waste acid in the fine filtration system, the pH adjusting tank 30 is connected with the ammonium sulfate solution tank 35 through the ammonium sulfate solution pump 34, after iron ions are precipitated and separated out, the waste acid is subjected to pressure filtration through the neutralization pressure filter 17, 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, 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 ensured to be 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 requirements of industrial production and use in other industries
The pH adjusting tank 30 is of a hollow structure with a cover plate at the top, 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 back-adjusting pH meter 32 is arranged in the right cavity; 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 back-adjusting pH tank 30, one end of the circulating pipeline is communicated with the lower part of the inner wall of the right chamber of the back-adjusting pH 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.
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 water separating port 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 water separating port 7, the lower portion of the inner wall of the acid adjusting groove 8 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, the pH of decolored waste acid in the acid adjusting groove 8 is adjusted to 3 to 4 in the back-adjusting pH process, the production cost is reduced, and the economic benefit of enterprises 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 secondary dewatering nozzle 23 above the side wall of the secondary dewatering adsorption tower 21 is communicated with the top of the inner cavity of the secondary dewatering 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; 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 right chamber.
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 trough 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 first water removal tank 10 continuously enters a neutralization pipeline reactor 13 through a neutralization feed pump 11 and a neutralization flowmeter 12 for metering and carrying out neutralization reaction with liquid ammonia, the neutralization reactor is provided with a neutralization pH meter 14, the pH is controlled to be 7-8, iron ions are enabled to generate 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 16, filtrate is collected by a neutralization filtrate tank 18, the neutralization filtrate tank 18 is metered and continuously enters a secondary adsorption tower 21 from a secondary water removal inlet 22 at the bottom of the secondary adsorption tower 21 through a secondary water removal inlet pump 19 and a secondary water removal feed flowmeter 20 for secondary decolorization, the decolorized filtrate flows out after flowing out from a secondary water removal outlet 23 at the upper part of the secondary adsorption tower 21 and enters a secondary water removal tank 24, the secondary water removal tank 24 is metered and 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, the filtrate flows into a pH groove 30 from a water outlet tank 27 from a water outlet of the precision filter 27, a fine filter pH meter 28 is arranged on a pipeline, a fine filter 29, the acid removal tank 24 and the fine filter flowmeter 29 is metered and continuously enters a primary filter tank 27 to adjust the DCS, and automatically adjusts the pH value of a DCS system according to adjust the pH value of the pH 9, and the DCS, and automatically adjusts the pH value of the DCS, and controls the DCS, and adjusts the pH meter 30, and the DCS, and adjusts the DCS, and controls the DCS, and the flow rate of the DCS, and the DCS system, and controls the DCS 5. The mixture was mixed in the pH-adjusted tank 30. The back-adjusting pH tank 30 is provided with a circulating pump 31 to ensure uniform mixing, a back-adjusting pH meter 32 is arranged on the back-adjusting pH tank 30, the back-adjusting pH tank 30 is divided into a left half and a right half by a baffle 33, overflow holes are arranged on the baffle 33, the mixture is uniformly mixed, and after the pH value is 3 to 4, the mixture overflows into the other half of the back-adjusting pH tank 30 and is pumped into an ammonium sulfate solution tank 35 for later use through an ammonium sulfate solution pump 34.
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 device 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 inside 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 back-off 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 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.
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 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 part 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, 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, characterized in that: 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 |
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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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| CN202010837469.6A CN112062140B (en) | 2020-08-19 | 2020-08-19 | Device for producing ammonium sulfate from dye sulfuric acid wastewater |
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| CN112062140B true CN112062140B (en) | 2023-01-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102826673B (en) * | 2011-06-15 | 2016-01-06 | 浙江龙盛集团股份有限公司 | A kind of cleaning method of dyestuffs industries acid waste water |
| CN103332821B (en) * | 2013-06-21 | 2016-03-30 | 浙江吉华集团股份有限公司 | Vitriolated method of wastewater treatment in a kind of dye well intermediate production process |
| US9776887B2 (en) * | 2013-12-04 | 2017-10-03 | 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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