CN217173506U - Nanofiltration salt separation effluent resource utilization system - Google Patents
Nanofiltration salt separation effluent resource utilization system Download PDFInfo
- Publication number
- CN217173506U CN217173506U CN202220849905.6U CN202220849905U CN217173506U CN 217173506 U CN217173506 U CN 217173506U CN 202220849905 U CN202220849905 U CN 202220849905U CN 217173506 U CN217173506 U CN 217173506U
- Authority
- CN
- China
- Prior art keywords
- unit
- nanofiltration
- resource utilization
- utilization system
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The utility model relates to a receive and strain salt play water resource utilization system, including receiving filter unit, bipolar membrane electrolysis unit and cryogenic distillation unit, receive filter unit's dense water export and bipolar membrane electrolysis unit and be connected, bipolar membrane electrolysis unit is connected with acidizing fluid storage tank, alkali lye storage tank respectively, receive filter unit's product water export and cryogenic distillation unit and be connected, cryogenic distillation unit's concentrate export is connected with ionic membrane unit, ionic membrane unit is connected with the sodium hypochlorite storage tank, the utility model discloses salt in the make full use of waste water realizes the resource retrieval and utilization of waste water on the basis of the nearly zero release of waste water.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, specifically speaking relates to a receive and strain salt play water resource utilization system.
Background
At present, the phenomenon that industrial wastewater in China pollutes water is serious, wherein salt-containing wastewater represented by printing and dyeing wastewater discharged by textile printing and dyeing industry is one of important pollution sources in industrial systems in China, meanwhile, the wastewater contains a large amount of inorganic salt impurities, the treatment difficulty is high, and even the problem that researchers describe that the salt-containing wastewater can be solved is one of the most important factors for the continuous survival and development of the related industries. With the increasing requirement on the discharge of the salt-containing wastewater in China, the requirement on zero discharge of the wastewater is also increased. However, the current zero-discharge process is more focused on no discharge or reduced discharge, and does not effectively recycle and utilize the salt in the wastewater, thereby causing resource waste.
SUMMERY OF THE UTILITY MODEL
Aiming at various defects in the prior art and solving the problems, a nanofiltration salt separation effluent resource utilization system is provided.
In order to achieve the above object, the utility model provides a following technical scheme:
a nanofiltration salt separation effluent resource utilization system comprises a nanofiltration unit, a bipolar membrane electrolysis unit and a low-temperature distillation unit, wherein a concentrated water outlet of the nanofiltration unit is connected with the bipolar membrane electrolysis unit, the bipolar membrane electrolysis unit is respectively connected with an acid liquor storage tank and an alkali liquor storage tank, a water outlet of the nanofiltration unit is connected with the low-temperature distillation unit, a concentrated solution outlet of the low-temperature distillation unit is connected with an ionic membrane unit, and the ionic membrane unit is connected with a sodium hypochlorite storage tank.
Furthermore, the nanofiltration unit is provided with multiple stages, the liquid inlet end of the nanofiltration unit positioned at the first stage is connected with the raw water pipe, the concentrated water outlet of the nanofiltration unit positioned at the previous stage is connected with the liquid inlet end of the nanofiltration unit positioned at the next stage, and the concentrated water outlet of the nanofiltration unit positioned at the last stage is connected with the nanofiltration concentrated water tank.
Further, a first booster pump is arranged between a concentrated water outlet of the nanofiltration unit of the previous stage and a liquid inlet end of the nanofiltration unit of the next stage.
Furthermore, the water production outlets of the multi-stage nanofiltration units are connected with a water production main pipe, and a nanofiltration water production tank is arranged between the water production main pipe and the low-temperature distillation unit.
Furthermore, the intercepted molecular weight of the nanofiltration membrane adopted by the nanofiltration unit of the previous stage is larger than that of the nanofiltration membrane adopted by the nanofiltration unit of the next stage.
Furthermore, a concentrated water outlet and a produced water outlet of the nanofiltration unit are both provided with a flowmeter and a conductivity meter.
Furthermore, a security filter is arranged between the raw water pipe and the liquid inlet end of the first-stage nanofiltration unit.
Further, a second booster pump is arranged between the raw water pipe and the security filter, and a high-pressure pump is arranged between the security filter and the liquid inlet end of the first-stage nanofiltration unit.
Further, a third booster pump is arranged between the nanofiltration water production tank and the low-temperature distillation unit.
Preferably, the cryogenic distillation unit comprises a preheater, a distillation tank, a separator and a compressor, which are relatively mature prior art and will not be described herein.
Further, a fourth booster pump is arranged between the nanofiltration concentrated water tank and the bipolar membrane electrolysis unit.
Preferably, the bipolar membrane electrolysis unit comprises an anode, a cathode and a membrane unit, wherein the membrane unit is located between the anode and the cathode, which is a relatively mature prior art and is not described herein again.
Furthermore, an acid liquor circulating pump is arranged between the bipolar membrane electrolysis unit and the acid liquor storage tank, and an alkali liquor circulating pump is arranged between the bipolar membrane electrolysis unit and the alkali liquor storage tank.
The utility model has the advantages that:
1. sodium hypochlorite, acid and alkali are prepared by the nanofiltration unit, the bipolar membrane electrolysis unit, the low-temperature distillation unit and the ionic membrane unit, and the salt in the wastewater is fully utilized on the basis of near zero discharge of the wastewater, so that the resource recycling of the wastewater is realized.
2. The pressure of the concentrated water is reduced after nanofiltration, and in order to meet the subsequent working requirements, a first booster pump is arranged between a concentrated water outlet of the nanofiltration unit at the previous stage and a liquid inlet end of the nanofiltration unit at the next stage, so that the pressure of the concentrated water is improved.
3. The equipment is simple, the flow is short, and the operability is strong.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the drawings: the device comprises a 1-nanofiltration unit, a 2-low temperature distillation unit, a 3-bipolar membrane electrolysis unit, a 4-nanofiltration water production tank, a 5-nanofiltration concentrated water tank, a 6-sodium hypochlorite storage tank, a 7-acid liquid storage tank, an 8-alkali liquid storage tank, a 9-cartridge filter, a 10-second booster pump, an 11-high pressure pump, a 12-conductivity meter, a 13-flow meter, a 14-third booster pump, a 15-concentrated liquid storage tank, a 16-fourth booster pump, a 17-ionic membrane unit, an 18-acid liquid circulating pump, a 19-alkali liquid circulating pump and a 20-first booster pump.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description, together with the drawings of the present invention, clearly and completely describes the technical solution of the present invention, and based on the embodiments in the present application, other similar embodiments obtained by those skilled in the art without creative efforts shall all belong to the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. mentioned in the following embodiments are directions with reference to the drawings only, and thus, the directional terms used are intended to illustrate rather than limit the inventive concept.
The present invention will be further described with reference to the accompanying drawings and preferred embodiments.
The first embodiment is as follows:
as shown in fig. 1, a nanofiltration salt separation effluent resource utilization system comprises a nanofiltration unit 1, a bipolar membrane electrolysis unit 3 and a low-temperature distillation unit 2, wherein the nanofiltration unit 1 is used for carrying out nanofiltration salt separation treatment on wastewater to separate monovalent salt from divalent salt (mainly sodium chloride and sodium sulfate), the bipolar membrane electrolysis unit 3 is used for electrolyzing concentrated water treated by the nanofiltration unit 1 to prepare acid and alkali, the prepared acid and alkali can be recycled to other sewage treatment facilities or sold, the low-temperature distillation unit 2 is used for carrying out evaporation concentration on the produced water treated by the nanofiltration unit 1 in a low-temperature distillation mode, the evaporated distilled water is collected and enters a reuse tank to be mixed with other pure water for reuse in enterprises, and the concentration of the concentrated solution after distillation reaches 26%.
Specifically, a concentrated water outlet of the nanofiltration unit 1 is connected with a bipolar membrane electrolysis unit 3, the bipolar membrane electrolysis unit 3 is respectively connected with an acid liquor storage tank 7 and an alkali liquor storage tank 8, a water production outlet of the nanofiltration unit 1 is connected with a low-temperature distillation unit 2, a concentrated solution outlet of the low-temperature distillation unit 2 is connected with an ionic membrane unit 17 through a concentrated solution storage tank 15, the ionic membrane unit 17 is connected with a sodium hypochlorite storage tank 6, and the ionic membrane unit 17 is preferably an ionic membrane electrolysis cell.
The nanofiltration unit 1 is provided with multiple stages, the liquid inlet end of the nanofiltration unit positioned at the first stage is connected with a raw water pipe through a security filter 9, a second booster pump 10 is arranged between the raw water pipe and the security filter 9, and a high-pressure pump 11 is arranged between the security filter 9 and the liquid inlet end of the nanofiltration unit at the first stage.
The concentrated water outlet of the nanofiltration unit of the previous stage is connected with the liquid inlet end of the nanofiltration unit of the next stage, simultaneously, the pressure of the concentrated water is reduced after nanofiltration, and in order to meet the subsequent working requirements, a first booster pump 20 is arranged between the concentrated water outlet of the nanofiltration unit of the previous stage and the liquid inlet end of the nanofiltration unit of the next stage, so that the pressure of the concentrated water is improved. Meanwhile, the intercepted molecular weight of the nanofiltration membrane adopted by the nanofiltration unit of the previous stage is larger than that of the nanofiltration membrane adopted by the nanofiltration unit of the next stage.
The concentrated water outlet of the nanofiltration unit positioned at the final stage is connected with a nanofiltration concentrated water tank 5, the water production outlets of the multistage nanofiltration units are connected with a water production main pipe, and a nanofiltration water production tank 4 is arranged between the water production main pipe and the low-temperature distillation unit 2. Meanwhile, a concentrated water outlet and a produced water outlet of the nanofiltration unit are respectively provided with a flowmeter 13 and a conductivity meter 12, the flowmeter 13 is used for detecting the flow of concentrated water and produced water, and the conductivity meter 12 is used for detecting the water quality of the concentrated water outlet and the produced water outlet. In addition, liquid level transmitters are arranged inside the nanofiltration water production tank 4 and the nanofiltration concentrated water tank 5.
And a third booster pump 14 is arranged between the nanofiltration water production tank 4 and the low-temperature distillation unit 2. Specifically, the cryogenic distillation unit comprises a preheater, a distillation tank, a separator and a compressor, which is a relatively mature prior art. The water outlet of the nanofiltration unit 1 is monovalent salt solution (mainly sodium chloride), evaporation concentration is carried out in a low-temperature distillation mode, evaporated distilled water is collected and enters a reuse water pool to be mixed with other pure water and reused in an enterprise, the concentration of the distilled concentrated solution reaches 26%, the concentrated solution is lifted to the ionic membrane unit 17 through a water pump to be electrolyzed to obtain sodium hypochlorite and chlorine, the sodium hypochlorite and the chlorine are used for strong oxidation in a wastewater pretreatment stage, and meanwhile, the residual sodium hypochlorite can be used for disinfection and oxidation of the enterprise.
And a fourth booster pump 16 is arranged between the nanofiltration concentrated water tank 5 and the bipolar membrane electrolysis unit 3. Specifically, the bipolar membrane electrolysis unit 3 comprises an anode, a cathode and a membrane unit, wherein the membrane unit is located between the anode and the cathode, and the membrane unit is relatively mature in the prior art. Meanwhile, an acid liquor circulating pump 18 is arranged between the bipolar membrane electrolysis unit 3 and the acid liquor storage tank 7, and an alkali liquor circulating pump 19 is arranged between the bipolar membrane electrolysis unit 3 and the alkali liquor storage tank 8. The concentrated water outlet of the nanofiltration unit 1 is divalent salt solution (mainly sodium sulfate solution), and the divalent salt solution is lifted by a fourth booster pump 16 and enters the bipolar membrane electrolysis unit 3 to prepare acid liquor and alkali liquor.
Namely, sodium hypochlorite, acid liquor and alkali liquor are prepared by the nanofiltration unit 1, the bipolar membrane electrolysis unit 3, the low-temperature distillation unit 2 and the ionic membrane unit 17, and the salt in the wastewater is fully utilized on the basis of near zero discharge of the wastewater, so that the resource recycling of the wastewater is realized. In addition, a pressure transmitter, a regulating valve, a check valve and the like are arranged on a connecting pipeline among the elements of the nanofiltration unit 1, the bipolar membrane electrolysis unit 3, the low-temperature distillation unit 2, the ionic membrane unit 17, the cartridge filter 9 and the like.
Example two:
as shown in fig. 1, the present embodiment is different from the first embodiment in that:
the nanofiltration unit 1 is provided with two stages which are respectively a first-stage nanofiltration unit and a second-stage nanofiltration unit, wherein a liquid inlet end of the first-stage nanofiltration unit is connected with a liquid outlet end of the security filter 9, a water outlet of the first-stage nanofiltration unit is connected with the nanofiltration water tank 4, a concentrated water outlet of the first-stage nanofiltration unit is connected with a liquid inlet end of the second-stage nanofiltration unit, a water outlet of the second-stage nanofiltration unit is connected with the nanofiltration water tank 4, and a concentrated water outlet of the second-stage nanofiltration unit is connected with the nanofiltration water tank 5.
Wherein the molecular weight cut-off of the nanofiltration membrane adopted by the first-stage nanofiltration unit is 500-800 Dalton, and the molecular weight cut-off of the nanofiltration membrane adopted by the second-stage nanofiltration unit is 200-500 Dalton.
The above detailed description is only for the preferred embodiment of the present invention, and the scope of the present invention should not be limited by the above detailed description, and all the equivalent variations and modifications made according to the scope of the present invention should be included in the scope of the present invention.
Claims (9)
1. The nanofiltration salt separation effluent resource utilization system is characterized by comprising a nanofiltration unit, a bipolar membrane electrolysis unit and a low-temperature distillation unit, wherein a concentrated water outlet of the nanofiltration unit is connected with the bipolar membrane electrolysis unit, the bipolar membrane electrolysis unit is respectively connected with an acid liquor storage tank and an alkali liquor storage tank, a water outlet of the nanofiltration unit is connected with the low-temperature distillation unit, a concentrated solution outlet of the low-temperature distillation unit is connected with an ionic membrane unit, and the ionic membrane unit is connected with a sodium hypochlorite storage tank.
2. The nanofiltration separated salt effluent resource utilization system according to claim 1, wherein the nanofiltration unit is provided with multiple stages, a liquid inlet end of the nanofiltration unit positioned at the first stage is connected with a raw water pipe, a concentrated water outlet of the nanofiltration unit positioned at the previous stage is connected with a liquid inlet end of the nanofiltration unit positioned at the next stage, and a concentrated water outlet of the nanofiltration unit positioned at the last stage is connected with a nanofiltration concentrated water tank.
3. The nanofiltration salt effluent resource utilization system according to claim 2, wherein a first booster pump is arranged between a concentrated water outlet of the nanofiltration unit of the previous stage and a liquid inlet end of the nanofiltration unit of the subsequent stage.
4. The nanofiltration salt effluent resource utilization system according to claim 3, wherein the molecular weight cut-off of the nanofiltration membrane used in the nanofiltration unit of the previous stage is greater than the molecular weight cut-off of the nanofiltration membrane used in the nanofiltration unit of the subsequent stage.
5. The nanofiltration salt effluent resource utilization system according to any one of claims 2 to 4, wherein the water production outlets of the multistage nanofiltration units are connected to a water production main, and a nanofiltration water production tank is arranged between the water production main and the cryogenic distillation unit.
6. The nanofiltration salt separation effluent resource utilization system according to claim 5, wherein a cartridge filter is arranged between the raw water pipe and the liquid inlet end of the first-stage nanofiltration unit.
7. The nano-filtration salt effluent resource utilization system according to claim 6, wherein a second booster pump is arranged between the raw water pipe and the cartridge filter, and a high-pressure pump is arranged between the cartridge filter and the liquid inlet end of the first-stage nano-filtration unit.
8. The nanofiltration salt effluent resource utilization system according to claim 7, wherein a third booster pump is arranged between the nanofiltration product water tank and the cryogenic distillation unit, and a fourth booster pump is arranged between the nanofiltration concentrate water tank and the bipolar membrane electrolysis unit.
9. The nanofiltration separated salt effluent resource utilization system according to claim 8, wherein an acid circulation pump is arranged between the bipolar membrane electrolysis unit and the acid storage tank, and an alkali circulation pump is arranged between the bipolar membrane electrolysis unit and the alkali storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220849905.6U CN217173506U (en) | 2022-04-13 | 2022-04-13 | Nanofiltration salt separation effluent resource utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220849905.6U CN217173506U (en) | 2022-04-13 | 2022-04-13 | Nanofiltration salt separation effluent resource utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217173506U true CN217173506U (en) | 2022-08-12 |
Family
ID=82710018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220849905.6U Active CN217173506U (en) | 2022-04-13 | 2022-04-13 | Nanofiltration salt separation effluent resource utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217173506U (en) |
-
2022
- 2022-04-13 CN CN202220849905.6U patent/CN217173506U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107366005B (en) | A kind of process of sodium sulphate type bittern perhalogeno ionic membrane caustic soda by-product anhydrous sodium sulphate | |
| CN114133065B (en) | Method for preparing calcium chloride concentrate from ammonia distillation wastewater | |
| CN106365183B (en) | A kind of high magnesium solution electrodialysis carries the recovery method of electrode relief liquor during lithium | |
| CN103388198A (en) | Method for preparing acid base from waste liquid of viscose sodium sulphate by bipolar membrane electrodialysis method | |
| CN103922500A (en) | Zero discharge processor for electronickelling rinsing waste water and processing method thereof | |
| CN217173506U (en) | Nanofiltration salt separation effluent resource utilization system | |
| CN101602560A (en) | The concentrated recovery method and the device of low-concentration industrial waste acid water | |
| CN202881038U (en) | Electroplating waste water separation and recycling treatment apparatus | |
| CN217202410U (en) | Reclaimed water recycling system | |
| CN218910533U (en) | Water electrolysis hydrogen production system | |
| CN1214272A (en) | Continuous stirring vacuum sodium sulfate crystallization technology | |
| CN216039105U (en) | Aramid fiber spinning production system with waste liquid recovery processing function | |
| CN216336747U (en) | Device for preparing calcium chloride concentrated solution by ammonia distillation wastewater | |
| CN113401924B (en) | Brine refining method | |
| CN212151922U (en) | System for utilize electrodialysis utilization strong brine | |
| CN203845874U (en) | Nickel electroplating rinsing wastewater zero-emission treatment device | |
| CN210340592U (en) | High salt waste water refines industry salt device | |
| CN209519609U (en) | A kind of two-pass reverse osmosis membranous system of energy content recycling | |
| CN202988883U (en) | Waste acid and waste saline water treatment system combining inorganic synthesis with reverse osmosis | |
| CN113493278A (en) | Membrane reactor system for preparing polyaluminum chloride from aluminum-containing wastewater | |
| CN114656074B (en) | Coal chemical industry high-salinity wastewater treatment system and method based on multistage multi-section bipolar membrane | |
| CN111377567A (en) | System and method for utilizing electrodialysis resource to utilize strong brine | |
| CN210736911U (en) | Prevent blockking up electrolysis trough brine circulating system | |
| CN110668626A (en) | Chemical industry caustic soda device wastewater treatment process | |
| CN220413546U (en) | Electrolytic hydrogen production device for fracturing flowback fluid waste water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |