CN104370405B - A kind for the treatment of process of high rigidity height salinity wastewater zero discharge - Google Patents
A kind for the treatment of process of high rigidity height salinity wastewater zero discharge Download PDFInfo
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- CN104370405B CN104370405B CN201410580324.7A CN201410580324A CN104370405B CN 104370405 B CN104370405 B CN 104370405B CN 201410580324 A CN201410580324 A CN 201410580324A CN 104370405 B CN104370405 B CN 104370405B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002351 wastewater Substances 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 44
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 32
- 239000004902 Softening Agent Substances 0.000 claims abstract description 15
- 238000001728 nano-filtration Methods 0.000 claims abstract description 14
- 238000000909 electrodialysis Methods 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000002203 pretreatment Methods 0.000 claims abstract description 10
- 239000000047 product Substances 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 5
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 239000013505 freshwater Substances 0.000 claims abstract description 5
- 239000012466 permeate Substances 0.000 claims abstract description 5
- 230000008929 regeneration Effects 0.000 claims abstract description 5
- 238000011069 regeneration method Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 230000015271 coagulation Effects 0.000 claims description 6
- 238000005345 coagulation Methods 0.000 claims description 6
- 239000008237 rinsing water Substances 0.000 claims description 6
- 239000000072 sodium resin Substances 0.000 claims description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 230000008676 import Effects 0.000 abstract 1
- 239000003643 water by type Substances 0.000 abstract 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 239000012267 brine Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- -1 amide compound Chemical class 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to water-treatment technology field, particularly relate to and disclose a kind for the treatment of process of high rigidity height salinity wastewater zero discharge, comprise pre-treatment successively, the ultrafiltration of one workshop section, the reverse osmosis of one workshop section, one workshop section's reverse osmosis concentrated water carries out intensive treatment, and through multi-medium filtering, soften and enter the ultrafiltration of two workshop sections, the reverse osmosis of two workshop sections, two workshop section's reverse osmosis concentrated waters pass through nanofiltration device, nanofiltration permeate is through electrodialysis unit, the fresh water that electrodialysis unit produces imports the ultrafiltration of two workshop sections and produces in water, electrodialysis unit dope is used for the regeneration of softening agent, nanofiltration concentrated solution enters vapo(u)rization system and obtains solid substance, the product water of the reverse osmosis of one workshop section and the reverse osmosis of two workshop sections is as reuse water.A kind of high rigidity wastewater zero emission treatment method of the present invention, employing materializing strategy, membrane integrating technique are combined with evaporation technique, efficiently solve the problem of dense water high rigidity height salinity discharge environmental pollution, can reach zero emission requirement, and stable effluent quality, improve Water Sproading utilization ratio.
Description
Technical field
The present invention relates to water-treatment technology field, particularly relate to a kind for the treatment of process of high rigidity height salinity wastewater zero discharge.
Background technology
Brine waste, especially high rigidity trade effluent composition is more complicated, therefore more difficult.If the industries such as papermaking, printing and dyeing, citric acid are due to the specific requirement of production technique, salinity and the hardness of waste discharge are higher, increase the difficulty of process.These industries use water rich and influential family, its factory effluent mainly contains two kinds for the treatment of processs, one be through Traditional materialized with biochemical treatment after directly discharge, organism in this brine waste and high salinity have greater environmental impacts, two is that part plant produced waste water reaches part reuse through embrane method process, thus reduce the object of water consumption, but the dense water treatment that reverse osmosis produces becomes a difficult problem, if be directly disposed to neighbouring sewage work, high salinity may impact producing original biological processing unit, even causes sewage work's systemic breakdown.Under the background of shortage of water resources and day by day severe environmental protection policy, brine waste, especially the zero release of high rigidity trade effluent is a kind of method of thorough address contamination discharge.
Application number is 201310311089.9,201110123654.X patent discloses embrane method to highly-saline membrane treating method, obviously improper to the process of high rigidity height salinity waste water.Application number be 201210534825.2 patent of invention disclose and a kind ofly adopt the biochemical method process high rigidity height salinity waste water combined with materialization, but the requirement of senior reuse and zero release can't be reached.
Summary of the invention
For the defect of prior art, the invention provides that a kind of cost is low, the high rigidity height salinity method of wastewater treatment of stable and reliable operation, the method can apply process papermaking discharge tail water, citric acid, chlorine industry produce the high rigidity height salinity waste water such as the dense water in waste discharge and the reuse of conventional reverse osmosis embrane method.
For achieving the above object, the present invention adopts following technical scheme:
A treatment process for high rigidity height salinity wastewater zero discharge, comprises the following steps:
1) high rigidity height salinity waste water carries out through workshop section's pretreatment unit the pre-treatment reducing hardness, suspension content, COD, and pretreated main water-quality guideline reaches: COD≤60mg/L, hardness≤200, specific conductivity≤10000uS/cm; The membrane treating method adopted in the present invention has water quality to limit to former water, high rigidity, suspension content and COD value will affect the steady running of film condensing device, the essence of membrane processing method is a concentrated process, for preventing the mineral ion (such as: calcium ion) in waste water in a large amount of deposition in film surface, there is fouling, affect the steady running of membranous system, therefore must its content be reduced.
2) workshop section's ultra-filtration equipment, workshop section's reverse osmosis unit is entered successively through the pretreated waste water of step 1), wherein, the water inlet of water as workshop section's reverse osmosis unit is produced in the ultrafiltration of one workshop section, the product water of one workshop section's reverse osmosis unit enters reuse pool and uses as reuse water, and the dense water of workshop section's reverse osmosis unit enters dense enhanced water treatment unit to carry out being oxidized, reducing hardness process; Reverse osmosis unit ratio of desalinization is greater than 95% usually, and that is in water, most ion and organism are all trapped within dense water.The reusing rate of general Treated sewage reusing reverse osmosis unit is greater than 70%, is equivalent to concentrate 3-4 doubly to the most ion in water and organism, this dense water is passed into subsequent step and carries out intensive treatment, can be beneficial to reduction hardness, reduce the load of subsequent processing units.
3) water outlet of dense enhanced water treatment unit enters two workshop section's more medium filters successively, softening agent reduces its SS and hardness; The effect of more medium filter can remove suspended substance, object through softening agent reduces secondary ion further, particularly reduce the content of calcium ion in waste water, magnesium ion, mineral ion fouling in avoiding follow-up high power concentrated and polluted membrane, the steady running of influential system.
4) water outlet of step 3) enters two workshop section's ultra-filtration equipment, two workshop section's reverse osmosis units successively, wherein, ultrafiltration is produced water and is entered two workshop sections ultrafiltration product pond, and as the water inlet of two workshop section's reverse osmosis units, two workshop section reverse osmosis units produce water and enter step 2) described in reuse pool use as reuse water, the dense water of two workshop section's reverse osmosis units enters nanofiltration device;
5) permeate of nanofiltration device enters electrodialysis unit, is produced from pond in the two workshop sections ultrafiltration that the fresh water of electrodialysis unit output enters described in step 4), the dense water of electrodialysis unit enters dense water tank, for the regeneration of softening agent resin in step 3), nanofiltration device concentrated solution enters vapo(u)rization system, obtains solid substance by evaporation.Nanofiltration device can concentrate the dense water of two workshop section's reverse osmosis units effectively further, concentrated particularly to the divalent ion in water and small organic molecule, and TDS is up to 20000-50000mg/L.
As preferably, the workshop section's pretreatment unit described in step 1) comprises coagulation dosing swash plate, accelerator, pre-treatment more medium filter, ozone, the one of charcoal absorption or multiple combination.
As preferably, for step 2) workshop section's hyperfiltration reverse-rinsing water and two workshop section's hyperfiltration reverse-rinsing water of step 4) collect backwash for two workshop section's more medium filters described in pre-treatment more medium filter described in step 1) or step 3).Save backwash water, be also beneficial to the steady running of whole device.
As preferably, step 2) described in workshop section's ultra-filtration equipment and step 4) described in two workshop sections' ultrafiltration films adopt immersion ultrafiltration or pillar pressure membrane assembly.
As preferably, step 2) described in workshop section's reverse osmosis unit and the reverse osmosis membrane that adopts of workshop section's reverse osmosis unit described in step 4) be antipollution, wide runner film assembly.
As preferably, step 2) described in dense enhanced water treatment unit comprise advanced oxidation device and chemicals dosing plant.By advanced oxidation effect, organic molecule is carried out oxide treatment, improve it by adsorptive power.By the removal of chemicals dosing plant strengthening to hardness, prevent the polluted membrane assembly in the concentrated middle fouling of follow-up high power.
As preferably, described advanced oxidation device comprises ozone oxidation, Fenton oxidation, microwave are oxidized one or more combinations, and chemicals dosing plant is coagulation dosing inclined-plate clarifying basin or accelerator.
As preferably, the softening agent described in step 3) is sodium resin softening agent.Resin in softening agent is sodium resin, and its effect exchanges with divalent cation.Along with the prolongation of working time, sodium resin will reach capacity state, and it will reduce the clearance of divalent cation.Solid matter contained by the permeate of nanofiltration device mainly monovalent salt, as NaCl, concentration is higher, reaches more than 1%, is concentrated into 10-20% by electrodialysis, can be used for the regeneration of sodium resin, achieves effective utilization of resource in system.
A kind of high rigidity wastewater zero emission treatment method of the present invention, employing materializing strategy, membrane integrating technique are combined with evaporation technique, efficiently solve the problem of dense water high rigidity height salinity discharge environmental pollution, can reach zero emission requirement, and stable effluent quality, improve Water Sproading utilization ratio.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention equipment therefor.
Embodiment
Below in conjunction with Fig. 1 and embodiment, the present invention is described further.
A treatment process for high rigidity height salinity wastewater zero discharge, uses device as shown in Figure 1, comprises the following steps:
1) the high rigidity waste water of paper mill qualified discharge, main water-quality guideline COD=60-80mg/L, hardness=800-1000, specific conductivity=5000-6000uS/cm, the pre-treatment reducing hardness, suspension content, COD is carried out through workshop section's pretreatment unit 1, one workshop section's pretreatment unit adopts the combination of pre-treatment more medium filter 19, coagulation dosing sloping plate deposition, ozonize, and pretreated main water-quality guideline reaches: COD=30mg/L, hardness=200;
2) workshop section's ultra-filtration equipment 2, workshop section's reverse osmosis unit 4 is entered successively through the pretreated waste water of step 1), wherein, the ultrafiltration of one workshop section is produced water and is entered workshop section ultrafiltration product pond 3, and enter workshop section's reverse osmosis unit 4 by high-pressure pump, the product water of one workshop section's reverse osmosis unit 4 enters reuse pool 5 and uses as reuse water, the dense water of one workshop section's reverse osmosis unit 4 enters dense enhanced water treatment unit 6 to carry out being oxidized, reducing hardness process, now the TDS of dense water reaches 12000mg/L, COD and reaches 900mg/L, and hardness reaches 650; Dense enhanced water treatment unit 6 comprises advanced oxidation device 7 and chemicals dosing plant 8, and advanced oxidation device 7 uses ozone oxidation, and chemicals dosing plant 8 adopts coagulation dosing inclined-plate clarifying basin, and after process, COD reaches 105mg/L, and hardness reaches 100;
3) water outlet of dense enhanced water treatment unit 6 enters two workshop section's more medium filters 9 successively, 10 low its SS suspension content and hardness fall in softening agent, and softening agent 10 adopts sodium resin softening agent, and now water outlet SS is less than 5mg/L, and hardness is down to 10;
4) water outlet of step 3) enters two workshop section's ultra-filtration equipment 11, two workshop section's reverse osmosis units 13 successively, wherein, ultrafiltration is produced water and is entered two workshop sections ultrafiltration product pond 12, and as the water inlet of two workshop section's reverse osmosis units 13, two workshop section's reverse osmosis units 13 produce water and enter step 2) described in reuse pool 5 as reuse water use, the dense water of two workshop section's reverse osmosis units 13 enters nanofiltration device 14;
5) permeate of nanofiltration device 14 enters electrodialysis unit 15, is produced from pond 12 in the two workshop sections ultrafiltration that the fresh water of electrodialysis unit 15 output enters described in step 4), the TDS of fresh water is 7500mg/L, the concentration of the dense water of electrodialysis unit 15 reaches 10-20%, enter dense water tank 16, for the regeneration of softening agent in step 3) 10 resin, nanofiltration device 14 concentrated solution enters vapo(u)rization system 17, obtains solid substance by evaporation.
Wherein, step 2) workshop section's hyperfiltration reverse-rinsing water and two workshop section's hyperfiltration reverse-rinsing water of step 4) enter backwash and collect the backwash of pond 18 for two workshop section's more medium filters 9 described in the pre-treatment more medium filter 19 described in step 1) and step 3).
Step 2) described in workshop section's ultra-filtration equipment and step 4) described in two workshop sections ultrafiltration films adopt immersion ultrafiltration, the pore size filter of ultra-filtration membrane is 0.1 micron, and material is polyvinylidene difluoride (PVDF) (PVDF), and delivery turbidity is 0.1NTU.
Step 2) described in workshop section's reverse osmosis unit and a workshop section reverse osmosis unit described in step 4) adopt width of flow path to be the polymeric amide compound anti-pollution reverse osmosis membrane of 31mil.
By the steady running of this process, high rigidity height salinity waste water achieves zero release, and the recovery utilization rate of water is high, efficiently solves effective Utilizing question of environment protection and water resources.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention, all equivalences done according to the content of the application's the scope of the claims change and modify, and all should be technology category of the present invention.
Claims (8)
1. a treatment process for high rigidity height salinity wastewater zero discharge, is characterized in that: comprise the following steps:
1) high rigidity height salinity waste water carries out through workshop section's pretreatment unit the pre-treatment reducing hardness, suspension content, COD, and pretreated main water-quality guideline reaches: COD≤60mg/L, hardness≤200, specific conductivity≤10000uS/cm;
2) workshop section's ultra-filtration equipment, workshop section's reverse osmosis unit is entered successively through the pretreated waste water of step 1), wherein, the water inlet of water as workshop section's reverse osmosis unit is produced in the ultrafiltration of one workshop section, the product water of one workshop section's reverse osmosis unit enters reuse pool and uses as reuse water, and the dense water of workshop section's reverse osmosis unit enters dense enhanced water treatment unit to carry out being oxidized, reducing hardness process;
3) water outlet of dense enhanced water treatment unit enters two workshop section's more medium filters successively, softening agent reduces its SS and hardness;
4) water outlet of step 3) enters two workshop section's ultra-filtration equipment, two workshop section's reverse osmosis units successively, wherein, ultrafiltration is produced water and is entered two workshop sections ultrafiltration product pond, and as the water inlet of two workshop section's reverse osmosis units, two workshop section reverse osmosis units produce water and enter step 2) described in reuse pool use as reuse water, the dense water of two workshop section's reverse osmosis units enters nanofiltration device;
5) permeate of nanofiltration device enters electrodialysis unit, is produced from pond in the two workshop sections ultrafiltration that the fresh water of electrodialysis unit output enters described in step 4), the dense water of electrodialysis unit enters dense water tank, for the regeneration of softening agent resin in step 3), nanofiltration device concentrated solution enters vapo(u)rization system, obtains solid substance by evaporation.
2. the treatment process of a kind of high rigidity height salinity wastewater zero discharge according to claim 1, is characterized in that: the workshop section's pretreatment unit described in step 1) comprises coagulation dosing swash plate, accelerator, pre-treatment more medium filter, ozone, the one of charcoal absorption or multiple combination.
3. the treatment process of a kind of high rigidity height salinity wastewater zero discharge according to claim 2, is characterized in that: for step 2) workshop section's hyperfiltration reverse-rinsing water and two workshop section's hyperfiltration reverse-rinsing water of step 4) collect backwash for two workshop section's more medium filters described in pre-treatment more medium filter described in step 1) or step 3).
4. the treatment process of a kind of high rigidity height salinity wastewater zero discharge according to claim 1, is characterized in that: step 2) described in workshop section's ultra-filtration equipment and step 4) described in two workshop sections ultrafiltration films adopt immersion ultrafiltration or pillar pressure membrane assembly.
5. the treatment process of a kind of high rigidity height salinity wastewater zero discharge according to claim 1, is characterized in that: step 2) described in workshop section's reverse osmosis unit and the reverse osmosis membrane that adopts of two workshop sections reverse osmosis units described in step 4) be antipollution, wide runner film assembly.
6. the treatment process of a kind of high rigidity height salinity wastewater zero discharge according to claim 1, is characterized in that: step 2) described in dense enhanced water treatment unit comprise advanced oxidation device and chemicals dosing plant.
7. the treatment process of a kind of high rigidity height salinity wastewater zero discharge according to claim 6, it is characterized in that: described advanced oxidation device comprises ozone oxidation, Fenton oxidation, microwave are oxidized one or more combinations, and chemicals dosing plant is coagulation dosing inclined-plate clarifying basin or accelerator.
8. the treatment process of a kind of high rigidity height salinity wastewater zero discharge according to claim 1, is characterized in that: the softening agent described in step 3) is sodium resin softening agent.
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| CN105174587B (en) * | 2015-10-03 | 2017-09-29 | 中国轻工业长沙工程有限公司 | A kind of slurrying vacuum in draft tube Zero discharge treatment method |
| CN105236630A (en) * | 2015-11-06 | 2016-01-13 | 北京津工海水科技有限公司 | Treatment technology and system for strong brine discharged through reverse osmosis device |
| CN105254105A (en) * | 2015-11-06 | 2016-01-20 | 北京津工海水科技有限公司 | Method and system for preparing salt by using strong brine discharged from seawater desalination plant |
| CN105417775A (en) * | 2015-11-27 | 2016-03-23 | 宁波清水源水务科技有限公司 | Reverse osmosis membrane treating and recycling method for printing and dyeing wastewater |
| CN105347594A (en) * | 2015-12-01 | 2016-02-24 | 杭州水处理技术研究开发中心有限公司 | High-salinity wastewater zero emission and high-purity sodium chloride recovering system |
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| CN105776669A (en) * | 2016-05-09 | 2016-07-20 | 北京桑德环境工程有限公司 | Combined high-recovery-rate membrane treatment system and method |
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