CN216191628U - Concentrated water reduction desalination system - Google Patents
Concentrated water reduction desalination system Download PDFInfo
- Publication number
- CN216191628U CN216191628U CN202122762883.8U CN202122762883U CN216191628U CN 216191628 U CN216191628 U CN 216191628U CN 202122762883 U CN202122762883 U CN 202122762883U CN 216191628 U CN216191628 U CN 216191628U
- Authority
- CN
- China
- Prior art keywords
- reverse osmosis
- water
- stage
- communicated
- osmosis device
- 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
Landscapes
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a concentrated water reduction desalination system, which comprises a pretreatment system, a primary reverse osmosis system, a secondary reverse osmosis system and an EDI desalination system; the first-stage reverse osmosis system comprises a first-stage reverse osmosis device, a first-stage concentrated water tank, a concentrated water reverse osmosis device, a hardness removal device and a high-pressure reverse osmosis device; the water production ports of the concentrated water reverse osmosis device and the high-pressure reverse osmosis device are respectively communicated with a raw water tank in the pretreatment system through pipelines; the water outlet of the pretreatment system is communicated with the water inlet of the first-stage reverse osmosis device; the water producing port of the first-stage reverse osmosis device is communicated with the second-stage reverse osmosis system; and a water producing port of the second-stage reverse osmosis system is communicated with the EDI desalination system. In the utility model, the produced water in the concentrated water reverse osmosis system and the high-pressure reverse osmosis device flows back to the pretreatment and is mixed with the tap water in the pretreatment, so that the tap water is replaced to be used as the raw water in the desalted water system, a large amount of tap water can be saved, and the water resource is saved and the production cost is reduced.
Description
Technical Field
The utility model relates to the field of water treatment, in particular to a concentrated water reduction desalting water system.
Background
The current reverse osmosis technology is generally designed to produce 75% of water, which produces about 25% of strong brine. If the raw water is underground brackish water with very poor water quality or seawater, the production of concentrated water is greater, possibly reaching 50%. Concentrated water generated by many reverse osmosis processes is directly discharged without being treated, so that waste of water resources and energy is caused, and meanwhile, the surrounding environment is polluted.
In the prior art, the main process of the desalination water system is as follows: the raw water tank, the multi-media filter, the activated carbon filter, the primary reverse osmosis, the secondary reverse osmosis, the EDI and the desalted water consume a large amount of tap water every day, the industrial tap water cost is higher, and the water production cost is correspondingly higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a concentrated water reduction desalting system.
The utility model has the innovation points that the produced water in the concentrated water reverse osmosis system and the produced water in the high-pressure reverse osmosis device flow back to the pretreated raw water tank and are mixed with the tap water in the raw water tank to replace the tap water to be used as the raw water in the desalted water system, so that a large amount of tap water can be saved, and the water resource is saved and the production cost is reduced; the concentrated water is physically compressed, does not need to be treated, realizes reduction and can be directly discharged.
In order to realize the purpose of the utility model, the technical proposal of the utility model is as follows:
a concentrated water reduction desalting water system comprises a pretreatment system, a primary reverse osmosis system, a secondary reverse osmosis system and an EDI desalting system; the primary reverse osmosis system comprises a primary reverse osmosis device, a primary concentrated water tank, a concentrated water reverse osmosis device, a hardness removal device and a high-pressure reverse osmosis device, wherein the primary concentrated water tank, the concentrated water reverse osmosis device, the hardness removal device and the high-pressure reverse osmosis device are sequentially communicated with a concentrated water port of the primary reverse osmosis device; the water producing port of the concentrated water reverse osmosis device and the water producing port of the high-pressure reverse osmosis device are respectively communicated with a raw water tank in the pretreatment system through pipelines; the water outlet of the pretreatment system is communicated with the water inlet of the first-stage reverse osmosis device; the water producing port of the first-stage reverse osmosis device is communicated with the second-stage reverse osmosis system; a water producing port of the secondary reverse osmosis system is communicated with the EDI desalination system; the concentrated water port of the high-pressure reverse osmosis device is communicated with an external concentrated water tank. The produced water in the concentrated water reverse osmosis system and the produced water in the high-pressure reverse osmosis device flow back to the pretreated raw water tank and are mixed with tap water in the raw water tank to replace the tap water used as raw water in the desalted water system, so that a large amount of tap water can be saved, and the water resource is saved and the production cost is reduced; the concentrated water is physically compressed, the water quality is not changed, the concentrated water does not need to be treated, the reduction is realized, and the concentrated water can be directly discharged.
Preferably, the secondary reverse osmosis system comprises a middle water tank, a secondary cartridge filter and a secondary reverse osmosis device which are sequentially communicated through pipelines; the water producing port of the first-stage reverse osmosis device is communicated with the middle water tank through a pipeline; the concentrated water port of the second-stage reverse osmosis device is communicated with the first-stage concentrated water tank through a pipeline; and a water production port of the secondary reverse osmosis device is communicated with the EDI desalination system through a pipeline. The second grade reverse osmosis system carries out the secondary desalination to the discharged product water of one-level reverse osmosis unit and handles, and the dense water after handling gets back to in the one-level dense pond back and mixes with one-level reverse osmosis unit's dense water, will produce the water after handling and get back to in the raw water case once more, not only can practice thrift a large amount of running water, the water economy resource, but also can reduce dense water and discharge.
Preferably, the EDI desalination system comprises a reuse water tank, an EDI cartridge filter and an EDI device which are sequentially communicated through pipelines; the water producing port of the second-stage reverse osmosis device is communicated with the reuse water tank through a pipeline; the thick water port of the EDI device is communicated with the middle water tank through a pipeline; and a water production port of the EDI device is communicated with a desalting water tank through a pipeline. The EDI desalination system further removes anions and cations in the secondary reverse osmosis produced water to finally obtain higher-quality desalted water; the concentrated water of the EDI device flows back to the middle water tank, is mixed with the inlet water and then enters the membrane component of the second-stage reverse osmosis device again for reverse osmosis treatment, so that the water resource is saved.
Preferably, the pretreatment system comprises a raw water tank, a raw water heat exchanger, an activated carbon filter and a primary security filter which are sequentially communicated through pipelines; the water outlet of the first-stage cartridge filter is communicated with the water inlet of the first-stage reverse osmosis device. The pretreatment system can ensure the long-term stable operation of the whole water treatment system and carry out pretreatment on raw water; an active carbon filter is adopted for removing micromolecular soluble organic matters and residual chlorine; a first-stage security filter is adopted to prevent the broken particle objects leaked by the front pretreatment device of the first-stage reverse osmosis device from entering the high-pressure pump and the RO membrane assembly to damage the high-pressure pump assembly and scratch the surface of the reverse osmosis membrane in the first-stage reverse osmosis device.
Preferably, an alkali adding device is arranged between the intermediate water tank and the second-stage cartridge filter. The water in the middle water pool is pumped into the second-stage cartridge filter through the second-stage reverse osmosis water supply pump. The alkali adding device is used because CO2 gas cannot be removed by a reverse osmosis membrane in the primary reverse osmosis system, and carbon dioxide gas dissolved in raw water enters subsequent equipment through the reverse osmosis membrane, and is partially converted into bicarbonate radicals to influence the quality of effluent water. In order to ensure that the secondary reverse osmosis device has higher removal capacity, sodium hydroxide is added into the water pumped out of the secondary reverse osmosis water supply pump, so that carbon dioxide gas is converted into bicarbonate radical and is removed by the secondary reverse osmosis membrane. The pH value of the primary reverse osmosis effluent is 8.5-8.3 by the added sodium hydroxide, so that carbon dioxide is fully converted into bicarbonate to exist in a form and is removed by the secondary reverse osmosis device, and the effluent quality is improved.
Preferably, a reducing agent dosing device and a scale inhibitor dosing device are sequentially communicated between the activated carbon filter and the primary cartridge filter through pipelines. The residual chlorine can be removed by adding a reducing agent into the water; the scale inhibitor is used before raw water enters reverse osmosis, so that scaling on a reverse osmosis concentrated water side can be prevented.
Preferably, a first-level high-pressure pump is arranged between the first-level cartridge filter and the first-level reverse osmosis device; a second-stage high-pressure pump is arranged between the second-stage cartridge filter and the second-stage reverse osmosis device.
The utility model has the beneficial effects that:
1. in the utility model, the produced water generated by the concentrated water reverse osmosis system and the produced water of the high-pressure reverse osmosis device flow back to the raw water tank and are mixed with the tap water in the raw water tank to replace the tap water used as the raw water in the desalted water system, so that a large amount of tap water can be saved, thereby saving water resources and reducing production cost; the concentrated water is physically compressed, the water quality is not changed, the concentrated water does not need to be treated, the reduction is realized, and the concentrated water can be directly discharged.
2. According to the utility model, an EDI desalination system is adopted to further remove anions and cations in the secondary reverse osmosis produced water, and finally high-quality desalted water is obtained; the concentrated water of the EDI device flows back to the front end of the second-stage reverse osmosis device, is mixed with the inlet water and then enters the membrane component of the second-stage reverse osmosis device again for reverse osmosis treatment, so that the water resource is saved.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
In the figure:
1. a pre-treatment system; 11. a raw water tank; 12. a raw water heat exchanger; 13. an activated carbon filter; 14. a first level cartridge filter; 15. a raw water pump; 2. a first-stage reverse osmosis system; 21. a first stage high pressure pump; 22. a first-stage reverse osmosis device; 23. a first-stage concentrated water tank; 24. a concentrated water reverse osmosis device; 25. a hardness removal device; 26. a high pressure reverse osmosis unit; 3. a secondary reverse osmosis system; 31. a middle water tank; 32. a secondary security filter; 33. a second stage high pressure pump; 34. a secondary reverse osmosis device; 4. an EDI desalination system; 41. a recycling water tank; 42. an EDI feed pump; 43. an EDI cartridge filter; 44. an EDI device; 45. a demineralized water tank; 5. a reducing agent dosing device; 6. a scale inhibitor dosing device; 7. and (4) an alkali adding device.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
The described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, a concentrated water reduction desalination system comprises a pretreatment system 1, a primary reverse osmosis system 2, a secondary reverse osmosis system 3 and an EDI desalination system 4.
As shown in fig. 1, the pretreatment system 1 comprises a raw water tank 11, a raw water heat exchanger 12, an activated carbon filter 13, a reducing agent dosing device 5, a scale inhibitor dosing device 6 and a primary cartridge filter 14, which are sequentially communicated with each other through a pipeline.
As shown in fig. 1, the primary reverse osmosis system comprises a primary reverse osmosis device 22 with a water inlet communicated with a water outlet of the primary cartridge filter 14, a primary concentrated water tank 23, a concentrated water reverse osmosis device 24, a hardness removal device 25 and a high-pressure reverse osmosis device 26, wherein the concentrated water inlet of the primary reverse osmosis device is sequentially communicated with a concentrated water outlet of the primary reverse osmosis device 22. A first-stage high-pressure pump 21 is arranged between the first-stage cartridge filter 14 and the first-stage reverse osmosis device 22; the water producing port of the concentrated water reverse osmosis device 24 and the water producing port of the high-pressure reverse osmosis device 26 are respectively communicated with the raw water tank 11 in the pretreatment system 1 through pipelines. The concentrate inlet of the high-pressure reverse osmosis device 26 is communicated with an external concentrate pool through a pipeline.
As shown in fig. 1, the secondary reverse osmosis system 3 comprises an intermediate water tank 31, an alkali adding device 7, a secondary cartridge filter 32 and a secondary reverse osmosis device 34, the water outlets of which are sequentially communicated through a pipeline. The water producing port of the first-stage reverse osmosis device 22 is communicated with the intermediate water tank 31 through a pipeline; a second-stage high-pressure pump 33 is arranged between the second-stage cartridge filter 32 and the second-stage reverse osmosis device 34; the concentrate port of the secondary reverse osmosis device 34 is communicated with the primary concentrate tank 23 through a pipeline.
As shown in fig. 1, the EDI desalination system 4 includes a reuse water tank 41, an EDI cartridge filter 43, and an EDI device 44, which are connected in series via pipes to the respective water production ports. The water production port of the secondary reverse osmosis device 34 is communicated with the reuse water tank 41 through a pipeline; the concentrate port of the EDI device 44 is communicated with the intermediate water tank 31 through a pipeline, and the product port is communicated with a desalted water tank 45 through a pipeline.
The system is also provided with a cleaning device for cleaning the primary reverse osmosis device 22 and the secondary reverse osmosis device 34; be provided with compressed air storage tank and be arranged in this system instrument, valve and active carbon filter 13 to scrub with compressed air's buffering, prevent that this system from instantaneously using too big to cause the influence to whole factory compressed air system.
In view of the above, it is desirable to provide,
when the concentrated water reduction desalting water system is used, raw water enters a raw water tank 11 for storage, is pumped into a raw water heat exchanger 12 through a raw water pump 15 to ensure that the temperature of the raw water entering a reverse osmosis membrane is within a specified temperature range, then micromolecule soluble organic matters and residual chlorine in the water are removed through an activated carbon filter 13, then a reducing agent and a scale inhibitor are sequentially added, the raw water is filtered through a primary security filter 14 and then is pumped into a primary reverse osmosis device 22 through a primary high-pressure pump 21, concentrated water of the primary reverse osmosis device 22 enters a primary concentrated water tank 23 for collection, and then concentrated water generated by a concentrated water reverse osmosis device 24 and the concentrated water reverse osmosis device 24 enters a hardness removal device 25; most of calcium and magnesium ions are removed by a hardness removal device 25 and then enter a high-pressure reverse osmosis device 26 for treatment; the produced water in the concentrated water reverse osmosis device 24 and the produced water in the high-pressure reverse osmosis device 26 are both returned to the raw water tank 11 to be mixed with the raw water in the raw water tank 11 for recycling.
The produced water treated by the first-stage reverse osmosis device 22 enters the intermediate water tank 31 for collection, then is pumped into the second-stage security filter 32 through the second-stage water supply pump for filtration, the discharged water is pumped into the second-stage reverse osmosis device 34 through the second-stage high-pressure pump 33 for treatment, and the produced concentrated water returns to the first-stage concentrated water tank 23 and is mixed with the concentrated water in the first-stage concentrated water tank 23.
The produced water produced in the second-stage reverse osmosis device 34 enters a recycling water tank 41 to be collected and partially recycled, the produced water is pumped into an EDI cartridge filter 43 through an EDI water supply pump 42 to be filtered, the filtered effluent enters an EDI device 44, and the produced concentrated water flows back to the intermediate water tank 31 to be recycled and is treated by the second-stage reverse osmosis system 3 again; the produced water in the EDI device 43 enters the demineralized water tank 45.
Claims (7)
1. A concentrated water reduction desalination system is characterized by comprising a pretreatment system, a primary reverse osmosis system, a secondary reverse osmosis system and an EDI desalination system; the primary reverse osmosis system comprises a primary reverse osmosis device, a primary concentrated water tank, a concentrated water reverse osmosis device, a hardness removal device and a high-pressure reverse osmosis device, wherein the primary concentrated water tank, the concentrated water reverse osmosis device, the hardness removal device and the high-pressure reverse osmosis device are sequentially communicated with a concentrated water port of the primary reverse osmosis device; the water producing port of the concentrated water reverse osmosis device and the water producing port of the high-pressure reverse osmosis device are respectively communicated with a raw water tank in the pretreatment system through pipelines; the water outlet of the pretreatment system is communicated with the water inlet of the first-stage reverse osmosis device; the water producing port of the first-stage reverse osmosis device is communicated with the second-stage reverse osmosis system; a water producing port of the secondary reverse osmosis system is communicated with the EDI desalination system; the concentrated water port of the high-pressure reverse osmosis device is communicated with an external concentrated water tank.
2. The concentrated water reduction desalination system of claim 1, wherein the secondary reverse osmosis system comprises an intermediate water tank, a secondary cartridge filter and a secondary reverse osmosis device which are sequentially communicated through a pipeline; the water producing port of the first-stage reverse osmosis device is communicated with the middle water tank through a pipeline; the concentrated water port of the second-stage reverse osmosis device is communicated with the first-stage concentrated water tank through a pipeline; and a water production port of the secondary reverse osmosis device is communicated with the EDI desalination system through a pipeline.
3. The concentrate water reduction desalination system of claim 2, wherein the EDI desalination system comprises a reuse water tank, an EDI cartridge filter and an EDI device which are sequentially communicated through a pipeline; the water producing port of the second-stage reverse osmosis device is communicated with the reuse water tank through a pipeline; the thick water port of the EDI device is communicated with the middle water tank through a pipeline; and a water production port of the EDI device is communicated with a desalting water tank through a pipeline.
4. The concentrated water reduction desalination system as claimed in claim 3, wherein the pretreatment system comprises a raw water tank, a raw water heat exchanger, an activated carbon filter and a primary cartridge filter which are sequentially communicated through a pipeline; the water outlet of the first-stage cartridge filter is communicated with the water inlet of the first-stage reverse osmosis device.
5. The concentrated water reducing and desalting system according to claim 2, wherein an alkali adding device is arranged between the intermediate water tank and the secondary cartridge filter.
6. The concentrated water reduction and desalination system as claimed in claim 4, wherein a reducing agent dosing device and a scale inhibitor dosing device are sequentially communicated between the activated carbon filter and the primary cartridge filter through pipelines.
7. The concentrated water reducing and desalting system according to claim 6, wherein a first-stage high-pressure pump is arranged between the first-stage cartridge filter and the first-stage reverse osmosis device; a second-stage high-pressure pump is arranged between the second-stage cartridge filter and the second-stage reverse osmosis device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122762883.8U CN216191628U (en) | 2021-11-12 | 2021-11-12 | Concentrated water reduction desalination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122762883.8U CN216191628U (en) | 2021-11-12 | 2021-11-12 | Concentrated water reduction desalination system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216191628U true CN216191628U (en) | 2022-04-05 |
Family
ID=80910160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122762883.8U Active CN216191628U (en) | 2021-11-12 | 2021-11-12 | Concentrated water reduction desalination system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216191628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115385491A (en) * | 2022-09-29 | 2022-11-25 | 上海电气电站环保工程有限公司 | Pre-desalination system with salt water self-treatment function |
-
2021
- 2021-11-12 CN CN202122762883.8U patent/CN216191628U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115385491A (en) * | 2022-09-29 | 2022-11-25 | 上海电气电站环保工程有限公司 | Pre-desalination system with salt water self-treatment function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9199866B2 (en) | High recovery drinking water process | |
| US9382135B2 (en) | Seawater desalination process | |
| CN108218087B (en) | System for treating high-salt-content wastewater based on multistage electrically-driven ionic membrane | |
| CN104276711A (en) | Reverse osmosis membrane treatment process for recycling industrial sewage and realizing zero release | |
| CN105084587A (en) | Treatment method and equipment of high-salt waste water | |
| CN102249459A (en) | System for desalinating sea water | |
| Čuda et al. | Reverse osmosis in water treatment for boilers | |
| CN202744400U (en) | System for recycling electroplating wastewater and heavy metal ions | |
| CN105439341A (en) | Salt-containing wastewater treatment system and treatment method | |
| CN104108813A (en) | Refining and chemical sewage desalting integrated treatment process and device | |
| CN110540318A (en) | Sewage recovery treatment system and treatment process | |
| CN216191628U (en) | Concentrated water reduction desalination system | |
| CN202542972U (en) | Zero discharge system for waste water | |
| CN113045059A (en) | Treatment system and treatment process for realizing zero discharge of wastewater by full-membrane method | |
| CN218561247U (en) | System for preparing water for preparing green hydrogen by utilizing sewage | |
| CN203807297U (en) | Sewage treatment and sea water desalting device | |
| CN107601729B (en) | Strong salt wastewater zero-discharge treatment process and system for steel industry | |
| CN214571274U (en) | Two-stage RO + EDI desalination water system | |
| Pankratz | Desalination technology trends | |
| CN110921948A (en) | Treatment device and treatment method for high-salinity industrial wastewater | |
| CN201704157U (en) | Integrated field purified water and softened water processing system | |
| CA2893345C (en) | Hybrid electrochemical softening desalination system and method | |
| CN210065273U (en) | Multistage electrochemical water treatment system | |
| CN203754532U (en) | Recycling model of drainage water of soft water preparation system | |
| CN209778389U (en) | Efficient and convenient seawater desalination vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |