CN209872457U - High recovery of waste water treatment divides salt system - Google Patents
High recovery of waste water treatment divides salt system Download PDFInfo
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- CN209872457U CN209872457U CN201920153436.2U CN201920153436U CN209872457U CN 209872457 U CN209872457 U CN 209872457U CN 201920153436 U CN201920153436 U CN 201920153436U CN 209872457 U CN209872457 U CN 209872457U
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Abstract
The utility model discloses a high-recovery salt separation system for wastewater treatment, which comprises an N-level high-pressure pump, an N-level nanofiltration unit, a multivalent salt recovery tank and a monovalent salt recovery tank, wherein N is more than or equal to 2; the liquid inlet end of the first high-pressure pump is connected with a wastewater discharge pipe, the liquid outlet end of the first high-pressure pump is connected with the liquid inlet end of the first-stage nanofiltration unit, the liquid inlet end of the Nth high-pressure pump is connected with the concentrated liquid outlet of the Nth-1-stage nanofiltration unit, and the liquid outlet end of the Nth high-pressure pump is connected with the liquid inlet end of the Nth-stage nanofiltration unit. The concentrated liquid outlet of the Nth-stage nanofiltration unit is connected to a multivalent salt recovery tank through a pipeline, and the penetrating liquid outlet of each stage of nanofiltration unit is respectively connected to a monovalent salt recovery tank through a pipeline. The utility model discloses a set up multistage receiving and straining, can collect and obtain monovalent salt solution and multivalent salt solution, realize recycling of resource, equipment is simple, and the treatment effect is reliable and stable.
Description
Technical Field
The utility model relates to a waste water treatment technical field, in particular to high recovery of waste water treatment divides salt system.
Background
The salt-containing wastewater mainly comprises circulating sewage, chemical station drainage and the like. The method for separating and reusing the salt from the salt-containing wastewater mainly comprises two technologies, namely a thermal evaporation technology and a membrane separation technology. The method for separating salt by adopting the thermal evaporation technology has the disadvantages of huge energy consumption, complex process and high production cost, so the membrane separation technology is the mainstream technology in the field.
Disclosure of Invention
To the problem, an object of the utility model is to provide a salt system is divided to high recovery of waste water treatment, through setting up multistage nanofiltration, can collect and obtain monovalent salt solution and multivalent salt solution, realize recycling of resource, equipment is simple, and the treatment effect is reliable and stable.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a high-recovery salt separation system for wastewater treatment comprises an N-level high-pressure pump, an N-level nanofiltration unit, a multivalent salt recovery tank and a monovalent salt recovery tank, wherein N is more than or equal to 2. The liquid inlet end of the first high-pressure pump is connected with a wastewater discharge pipe, the liquid outlet end of the first high-pressure pump is connected with the liquid inlet end of the first-stage nanofiltration unit, the liquid inlet end of the Nth high-pressure pump is connected with the concentrated liquid outlet of the Nth-1-stage nanofiltration unit, and the liquid outlet end of the Nth high-pressure pump is connected with the liquid inlet end of the Nth-stage nanofiltration unit. The concentrated liquid outlet of the Nth-stage nanofiltration unit is connected to a multivalent salt recovery tank through a pipeline, and the penetrating liquid outlet of each stage of nanofiltration unit is respectively connected to a monovalent salt recovery tank through a pipeline.
Further, N =3, wherein the cut-off molecular weight of the nanofiltration membrane in the first-stage nanofiltration unit is 500-750, the cut-off molecular weight of the nanofiltration membrane in the second-stage nanofiltration unit is 300-500, and the cut-off molecular weight of the nanofiltration membrane in the third-stage nanofiltration unit is 150-300.
The utility model discloses following beneficial effect has: the utility model provides a high recovery of waste water treatment divides salt system, through setting up multistage nanofiltration, can collect and obtain monovalent salt solution and multivalent salt solution, realizes recycling of resource, and equipment is simple, and the treatment effect is reliable and stable, and the running cost is low.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of the main component symbols: 1. a first high pressure pump; 10. a waste pipe; 2. a first-stage nanofiltration unit; 20. a first nanofiltration membrane; 21. a first concentrate outlet; 22. a first permeate outlet; 3. a second high pressure pump; 4. a secondary nanofiltration unit; 40. a second nanofiltration membrane; 41. a second concentrate outlet; 42. a second permeate outlet; 5. a third high pressure pump; 6. a third nanofiltration unit; 60. a third nanofiltration membrane; 61. a third concentrated solution outlet; 62. a third permeate outlet; 7. a monovalent salt recovery tank; 8. a multivalent salt recovery tank.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1, a high-recovery salt separation system for wastewater treatment comprises a first high-pressure pump 1, a first-stage nanofiltration unit 2, a second high-pressure pump 3, a second-stage nanofiltration unit 4, a third high-pressure pump 5, a third-stage nanofiltration unit 6, a monovalent salt recovery tank 7 and a multivalent salt recovery tank 8. The liquid inlet end of the first high-pressure pump 1 is connected with the wastewater discharge pipe 10, the liquid outlet end is connected with the liquid inlet end of the first-stage nanofiltration unit 2, the first nanofiltration membrane 20 is arranged inside the first-stage nanofiltration unit 2, and the interception molecular weight of the first nanofiltration membrane 20 is 500-fold-over 750. The first-stage nanofiltration unit 2 is provided with a first concentrated liquid outlet 21 and a first penetrating liquid outlet 22, the liquid inlet end of the second high-pressure pump 3 is connected with the first concentrated liquid outlet 21, the liquid outlet end of the second high-pressure pump is connected with the liquid inlet end of the second-stage nanofiltration unit 4, a second nanofiltration membrane 40 is arranged inside the second-stage nanofiltration unit 4, and the interception molecular weight of the second nanofiltration membrane 40 is 300-fold-wall 500. The second-stage nanofiltration unit 4 is provided with a second concentrated liquid outlet 41 and a second penetrating liquid outlet 42, the liquid inlet end of the third high-pressure pump 5 is connected with the second concentrated liquid outlet 41, the liquid outlet end is connected with the liquid inlet end of the third-stage nanofiltration unit 6, a third nanofiltration membrane 60 is arranged inside the third-stage nanofiltration unit 6, and the interception molecular weight of the third nanofiltration membrane 60 is 150-fold-water 300. The three-stage nanofiltration unit 6 is provided with a third concentrated solution outlet 61 and a third penetrating solution outlet 62, the third concentrated solution outlet 61 is connected to the multivalent salt recovery tank 8 through a pipeline, and the first penetrating solution outlet 22, the second penetrating solution outlet 42 and the third penetrating solution outlet 62 are respectively connected to the monovalent salt recovery tank 7 through pipelines.
The utility model discloses a theory of operation does: the wastewater enters a primary nanofiltration unit 2 through a wastewater discharge pipe 10 by a first high-pressure pump 1, and filtrate filtered by a first nanofiltration membrane 20 flows into a monovalent salt recovery tank 7 through a pipeline; concentrated solution generated by the first-stage nanofiltration unit 2 is pumped into a second-stage nanofiltration unit 4 through a second high-pressure pump 3, and filtrate filtered by a second nanofiltration membrane 40 flows into a monovalent salt recovery tank 7 through a pipeline; the concentrated solution generated by the second-stage nanofiltration unit 4 is pumped into a third-stage nanofiltration unit 6 through a third high-pressure pump 5, the filtrate filtered by a third nanofiltration membrane 60 enters a monovalent salt recovery tank 7, and the concentrated solution generated by the third-stage nanofiltration unit 6 enters a multivalent salt recovery tank 8.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. The utility model provides a high recovery of waste water treatment divides salt system which characterized in that: the device comprises an N-level high-pressure pump, an N-level nanofiltration unit, a multivalent salt recovery tank and a monovalent salt recovery tank, wherein N is more than or equal to 2; the liquid inlet end of the first high-pressure pump is connected with a wastewater discharge pipe, the liquid outlet end of the first high-pressure pump is connected with the liquid inlet end of the first-stage nanofiltration unit, the liquid inlet end of the Nth high-pressure pump is connected with the concentrated liquid outlet of the (N-1) th-stage nanofiltration unit, the liquid outlet end of the Nth-stage nanofiltration unit is connected with the liquid inlet end of the Nth-stage nanofiltration unit, the concentrated liquid outlet of the Nth-stage nanofiltration unit is connected to a multivalent salt recovery tank through a pipeline, and the penetrating liquid outlet of each stage of.
2. The high-recovery salt separation system for wastewater treatment as claimed in claim 1, wherein: and N =3, wherein the interception molecular weight of the nanofiltration membrane in the first-stage nanofiltration unit is 500-750, the interception molecular weight of the nanofiltration membrane in the second-stage nanofiltration unit is 300-500, and the interception molecular weight of the nanofiltration membrane in the third-stage nanofiltration unit is 150-300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920153436.2U CN209872457U (en) | 2019-01-29 | 2019-01-29 | High recovery of waste water treatment divides salt system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920153436.2U CN209872457U (en) | 2019-01-29 | 2019-01-29 | High recovery of waste water treatment divides salt system |
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| CN209872457U true CN209872457U (en) | 2019-12-31 |
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| CN201920153436.2U Active CN209872457U (en) | 2019-01-29 | 2019-01-29 | High recovery of waste water treatment divides salt system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115520934A (en) * | 2021-06-25 | 2022-12-27 | 中国石油化工股份有限公司 | Membrane separation recovery system and method |
| CN115520934B (en) * | 2021-06-25 | 2024-05-03 | 中国石油化工股份有限公司 | Membrane separation recovery system and method |
-
2019
- 2019-01-29 CN CN201920153436.2U patent/CN209872457U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115520934A (en) * | 2021-06-25 | 2022-12-27 | 中国石油化工股份有限公司 | Membrane separation recovery system and method |
| CN115520934B (en) * | 2021-06-25 | 2024-05-03 | 中国石油化工股份有限公司 | Membrane separation recovery system and method |
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