CN101830578A - Device and method for chemical wastewater reverse osmosis advanced desalination treatment without adding scale inhibitor - Google Patents
Device and method for chemical wastewater reverse osmosis advanced desalination treatment without adding scale inhibitor Download PDFInfo
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- CN101830578A CN101830578A CN201010301211A CN201010301211A CN101830578A CN 101830578 A CN101830578 A CN 101830578A CN 201010301211 A CN201010301211 A CN 201010301211A CN 201010301211 A CN201010301211 A CN 201010301211A CN 101830578 A CN101830578 A CN 101830578A
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- reverse osmosis
- nanofiltration
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- 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 invention relates to a device for chemical wastewater reverse osmosis advanced desalination treatment without adding scale inhibitor. A raw water tank is communicated with a nanofiltration membrane component through a pipeline; a nanofiltration water inlet pump and a nanofiltration water inlet control valve are arranged on the pipeline of the raw water tank and the nanofiltration membrane component; a water-producing pipeline which passes through the nanofiltration membrane component is connected with a reverse osmosis membrane component; a reverse osmosis membrane component is connected with a reverse osmosis water-producing tank through a pipeline; the nanofiltration membrane component is also connected with a nanofiltration high-salinity water drain tank through a nanofiltration high-salinity water drain valve; and the reverse osmosis membrane component is also connected with a reverse osmosis high-salinity water drain tank through a reverse osmosis high-salinity water drain valve. The nanofiltration pretreatment can effectively lighten the pressure of the reverse osmosis desalination, and prevent scaling on the surface of the reverse osmosis membrane; and the scale inhibitor is not needed in the operation process. The device for the chemical wastewater reverse osmosis advanced desalination treatment has the advantages of simple process and reliable operation, can change the loading capacity based on the water yield, and is particularly applied to the wastewater treatment needing the recovery of salts.
Description
Technical field
The invention belongs to the desalting technology field of water treatment, relate to the device and method that a kind of chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors is handled.
Background technology
Wastewater from chemical industry water-quality constituents complexity, high COD, high salinity, toxic to microorganism, biodegradability is poor, belongs to used water difficult to degradate.The many modes that combine with materialization coupling biochemical treatment and advanced treatment of present chemical wastewater treatment, wherein biochemical treatment can reduce organic content in the waste water, and advanced treatment is main purpose with the desalination.Chemical precipitation, multiple-effect distillation and reverse osmosis desalination method are generally adopted in the wastewater from chemical industry desalination, and wherein the chemical precipitation method processing cost is higher, and traditional distillation method power consumption is few, but fouling is comparatively serious.In recent years, reverse osmosis desalination method is because fenestra is little, desalting effect is applied in the chemical wastewater treatment significantly gradually and progressively occupy certain ratio.But because the reverse osmosis fenestra is little, film surface easily fouling is stopped up, water inlet need be carried out strict pre-treatment, if prevent that fouling from adding Scale inhibitors and then causing the dense water can't direct reuse, and the physical strength of film own is relatively poor, so many drawbacks that reverse osmosis membrane exists have all greatly limited the widespread use of reverse osmosis membrane desalination process in the wastewater from chemical industry advanced desalination is handled.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, the device and method that provides a kind of chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors to handle; This method to reduce the saltiness of feed water by reverse osmosis, alleviates the desalination pressure of reverse osmosis with the pretreatment operation of nanofiltration as feed water by reverse osmosis; This method equipment therefor is simple in structure, operates reliablely, and expense is low.
The present invention solves its technical problem and takes following technical scheme to realize:
The device that a kind of chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors is handled, comprise former water tank, nanofiltration membrane component, reverse osmosis membrane assembly, reverse osmosis produced water tank, former water tank pipeline connection nanofiltration membrane component, and nanofiltration water inlet water pump and nanofiltration water inlet control valve door are installed on the pipeline of former water tank and nanofiltration membrane component, water producing pipe road by nanofiltration membrane component connects reverse osmosis membrane assembly, feed water by reverse osmosis water pump and feed water by reverse osmosis by-pass valve control are installed on the pipeline between nanofiltration membrane component and the reverse osmosis membrane assembly, the reverse osmosis membrane assembly pipeline connects reverse osmosis produced water tank, nanofiltration membrane component also connects nanofiltration concentrated water discharge pond by nanofiltration concentrated water discharge valve, and reverse osmosis membrane assembly also connects reverse osmosis concentrated water discharging pond by the reverse osmosis concentrated water vent valves.
And the nanofiltration membrane of described nanofiltration membrane component adopts ESNA1-4040, and the reverse osmosis membrane of reverse osmosis membrane assembly adopts SWC1-4040.
The method that a kind of chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors is handled may further comprise the steps:
(1) nanofiltration pre-treatment: close feed water by reverse osmosis water pump, feed water by reverse osmosis by-pass valve control, reverse osmosis concentrated water vent valves, open nanofiltration water inlet control valve door and nanofiltration concentrated water discharge valve, open nanofiltration water inlet water pump, carry out the nanofiltration of wastewater from chemical industry and handle;
(2) reverse-osmosis treated: after the nanofiltration pre-treatment begins, open feed water by reverse osmosis by-pass valve control, reverse osmosis concentrated water vent valves, open the feed water by reverse osmosis water pump, the adjusting working pressure is 4.0Mpa, carries out the reverse-osmosis treated that water is produced in nanofiltration; Carry out the advanced desalination processing that above operation can realize wastewater from chemical industry, the final ratio of desalinization of waste water on average can reach 99.4%.
And the flooding velocity of nanofiltration membrane component is 0.10-0.30m in the described step (1)
3/ h, working pressure are 0.4-0.6Mpa; Working pressure in the reverse-osmosis treated is 3-5Mpa.
Advantage of the present invention and positively effect are:
1, the present invention carries out pre-treatment by using nanofiltration membrane to wastewater from chemical industry, has reduced the concentration of various inorganic ions in the wastewater from chemical industry, has alleviated the processing pressure of reverse osmosis desalination; Nanofiltration membrane is better to the removal effect of high valence ion, can remove calcium ion in the wastewater from chemical industry, magnesium ion, sulfate ion etc. effectively, has greatly reduced the danger of reverse osmosis membrane assembly fouling, has effectively prolonged the time of reverse osmosis membrane assembly desalination; By the removal of nanofiltration commute scale-forming ion, the reverse osmosis operation need not to use Scale inhibitors, is convenient to dense water reuse.
2, desalting plant of the present invention is simple in structure, operates reliablely, and desalting effect is good, and ratio of desalinization height, and can be according to the installed capacity of handling water yield conditioning equipment need to be specially adapted to the processing of the wastewater from chemical industry of reuse salt ion.
Description of drawings
Fig. 1 is an apparatus structure block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, and the invention will be further described to pass through specific embodiment, and following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
The device that a kind of chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors is handled, comprise former water tank 1, nanofiltration membrane component 10, reverse osmosis membrane assembly 7, reverse osmosis produced water tank 6, former water tank pipeline connection nanofiltration membrane component, and nanofiltration water inlet water pump 12 and nanofiltration water inlet control valve door 11 are installed on the pipeline of former water tank and nanofiltration membrane component, water producing pipe road by nanofiltration membrane component connects reverse osmosis membrane assembly, feed water by reverse osmosis water pump 9 and feed water by reverse osmosis by-pass valve control 8 are installed on the pipeline between nanofiltration membrane component and the reverse osmosis membrane assembly, the reverse osmosis membrane assembly pipeline connects reverse osmosis produced water tank, nanofiltration membrane component also connects nanofiltration concentrated water discharge pond 2 by nanofiltration concentrated water discharge valve 3, and reverse osmosis membrane assembly also connects reverse osmosis concentrated water discharging pond 4 by reverse osmosis concentrated water vent valves 5.
This device adopts the nanofiltration pre-treatment can effectively alleviate the pressure of reverse osmosis desalination, prevents the reverse osmosis membrane surface scale, can need not to add Scale inhibitors again when reverse osmosis is operated, and effective reusing concentrated water.The method that a kind of chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors is handled promptly adopts said apparatus to carry out the method that the wastewater from chemical industry advanced desalination is handled, and may further comprise the steps:
(1) nanofiltration pre-treatment: close feed water by reverse osmosis water pump, feed water by reverse osmosis by-pass valve control, reverse osmosis concentrated water vent valves, open nanofiltration water inlet control valve door and nanofiltration concentrated water discharge valve, open nanofiltration water inlet water pump, the flooding velocity of regulating nanofiltration membrane component is 0.20m3/h, working pressure is 0.5Mpa, begins to carry out the nanofiltration processing of wastewater from chemical industry;
(2) reverse-osmosis treated: after the nanofiltration pre-treatment begins, open feed water by reverse osmosis by-pass valve control, reverse osmosis concentrated water vent valves, open the feed water by reverse osmosis water pump, the adjusting working pressure is 4.0Mpa, carry out nanofiltration and produce the reverse-osmosis treated of water, carry out the advanced desalination processing that above operation can realize wastewater from chemical industry, the final ratio of desalinization of waste water on average can reach 99.4%.After the desalination operation is finished, close anti-permeability pump and nanofiltration water inlet water pump, close nanofiltration and feed water by reverse osmosis by-pass valve control and concentrated water discharge valve, promptly finish a wastewater from chemical industry advanced desalination and handle operation.The specification of each device that present method adopted is as follows: former water tank is of a size of Φ 900 * 600mm, reverse osmosis produced water tank is Φ 700 * 500mm, a nanofiltration membrane is installed in the nanofiltration membrane component, the film model is ESNA1-4040, a reverse osmosis membrane is installed in the reverse osmosis membrane assembly, and the film model is SWC1-4040, and nanofiltration water inlet water pump is: 25DX-41, the reverse osmosis high-pressure pump is Y132S-4, and nanofiltration concentrated water discharge pond and reverse osmosis concentrated water discharging pond are of a size of 500mm * 600mm * 600mm.
Claims (4)
1. device that the chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors is handled, it is characterized in that: comprise former water tank, nanofiltration membrane component, reverse osmosis membrane assembly, reverse osmosis produced water tank, former water tank pipeline connection nanofiltration membrane component, and nanofiltration water inlet water pump and nanofiltration water inlet control valve door are installed on the pipeline of former water tank and nanofiltration membrane component, water producing pipe road by nanofiltration membrane component connects reverse osmosis membrane assembly, feed water by reverse osmosis water pump and feed water by reverse osmosis by-pass valve control are installed on the pipeline between nanofiltration membrane component and the reverse osmosis membrane assembly, the reverse osmosis membrane assembly pipeline connects reverse osmosis produced water tank, nanofiltration membrane component also connects nanofiltration concentrated water discharge pond by nanofiltration concentrated water discharge valve, and reverse osmosis membrane assembly also connects reverse osmosis concentrated water discharging pond by the reverse osmosis concentrated water vent valves.
2. the device that the chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors according to claim 1 is handled, it is characterized in that: the nanofiltration membrane of described nanofiltration membrane component adopts ESNA1-4040, and the reverse osmosis membrane of reverse osmosis membrane assembly adopts SWC1-4040.
3. method that the chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors is handled is characterized in that: may further comprise the steps:
(1) nanofiltration pre-treatment: close feed water by reverse osmosis water pump, feed water by reverse osmosis by-pass valve control, reverse osmosis concentrated water vent valves, open nanofiltration water inlet control valve door and nanofiltration concentrated water discharge valve, open nanofiltration water inlet water pump, carry out the nanofiltration of wastewater from chemical industry and handle;
(2) reverse-osmosis treated: after the nanofiltration pre-treatment begins, open feed water by reverse osmosis by-pass valve control, reverse osmosis concentrated water vent valves, open the feed water by reverse osmosis water pump, the adjusting working pressure is 4.0Mpa, carries out the reverse-osmosis treated that water is produced in nanofiltration; Carry out the advanced desalination processing that above operation can realize wastewater from chemical industry, the final ratio of desalinization of waste water on average can reach 99.4%.
4. the method that the chemical wastewater reverse osmosis advanced desalination that need not to add Scale inhibitors according to claim 3 is handled, it is characterized in that: the flooding velocity of nanofiltration membrane component is 0.10-0.30m3/h in the described step (1), and working pressure is 0.4-0.6Mpa; Working pressure in the reverse-osmosis treated is 3-5Mpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010301211A CN101830578A (en) | 2010-02-04 | 2010-02-04 | Device and method for chemical wastewater reverse osmosis advanced desalination treatment without adding scale inhibitor |
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| CN201010301211A CN101830578A (en) | 2010-02-04 | 2010-02-04 | Device and method for chemical wastewater reverse osmosis advanced desalination treatment without adding scale inhibitor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380086A (en) * | 2011-02-17 | 2013-10-30 | 株式会社日立制作所 | Compound desalination system |
| CN105110421A (en) * | 2015-08-17 | 2015-12-02 | 北京朗新明环保科技有限公司南京分公司 | Industrial waste water treatment device after softening treatment and process thereof |
| CN107311381A (en) * | 2017-08-21 | 2017-11-03 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of reverse osmosis concentrated seawater comprehensive utilizing method and system |
-
2010
- 2010-02-04 CN CN201010301211A patent/CN101830578A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380086A (en) * | 2011-02-17 | 2013-10-30 | 株式会社日立制作所 | Compound desalination system |
| CN105110421A (en) * | 2015-08-17 | 2015-12-02 | 北京朗新明环保科技有限公司南京分公司 | Industrial waste water treatment device after softening treatment and process thereof |
| CN107311381A (en) * | 2017-08-21 | 2017-11-03 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of reverse osmosis concentrated seawater comprehensive utilizing method and system |
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Open date: 20100915 |