CN220703439U - High sodium chloride, sodium nitrate's wastewater treatment system - Google Patents
High sodium chloride, sodium nitrate's wastewater treatment system Download PDFInfo
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- CN220703439U CN220703439U CN202321062951.2U CN202321062951U CN220703439U CN 220703439 U CN220703439 U CN 220703439U CN 202321062951 U CN202321062951 U CN 202321062951U CN 220703439 U CN220703439 U CN 220703439U
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- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 title claims abstract description 96
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 66
- 235000010344 sodium nitrate Nutrition 0.000 title claims abstract description 48
- 239000004317 sodium nitrate Substances 0.000 title claims abstract description 48
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 33
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 16
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000001704 evaporation Methods 0.000 claims abstract description 31
- 230000008020 evaporation Effects 0.000 claims abstract description 31
- 150000003839 salts Chemical class 0.000 claims abstract description 31
- 239000012528 membrane Substances 0.000 claims abstract description 30
- 238000001728 nano-filtration Methods 0.000 claims abstract description 30
- 238000001556 precipitation Methods 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 238000009287 sand filtration Methods 0.000 claims abstract description 6
- 238000005262 decarbonization Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 97
- 238000003860 storage Methods 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 9
- 238000005261 decarburization Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 8
- 238000000108 ultra-filtration Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 238000010612 desalination reaction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000013535 sea water Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 7
- 239000010703 silicon Substances 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 235000002639 sodium chloride Nutrition 0.000 description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 239000002351 wastewater Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 7
- 238000005185 salting out Methods 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000006004 Quartz sand Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model particularly discloses a wastewater treatment system for high sodium chloride and sodium nitrate, which comprises an adjusting tank, a high-efficiency sedimentation tank, a sand filtration tank, an ultrafilter, weak acid resin, a decarbonization tower, a reverse osmosis instrument A, nanofiltration equipment, COD adsorption resin, tubular membrane equipment, a reverse osmosis instrument C, a triple-effect evaporation crystallizer, a salt precipitation tank and a dryer. The advantages are that: the system of the utility model further removes the silicon in the front concentrated water by adopting tubular membrane equipment, thereby guaranteeing the long-term operation of the later evaporation and the second-stage reverse osmosis. And the reverse osmosis instrument D is added to perform secondary reverse osmosis, so that the water is further concentrated, the evaporation scale is reduced, and the investment is reduced. Meanwhile, sulfate radical and organic matters in water are intercepted by adopting nanofiltration equipment, factors affecting the purity and evaporation capacity of salt products are intercepted to the positions of mixed salt, and finally sodium chloride and sodium nitrate with higher quality are produced.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment system with high sodium chloride and sodium nitrate.
Background
Along with the industrial development, especially some energy chemical enterprises for producing chemical fertilizers such as synthetic ammonia, urea and the like, a large amount of mixed salt wastewater can be generated in the processing production process of products, and the mixed salt wastewater contains a large amount of organic pollutants, so that the mixed salt wastewater is easy to cause rich oxidation of water quality and serious hazard, and can be discharged after being qualified in treatment. Besides less sodium sulfate, ammonia nitrogen and sodium chloride in the wastewater are higher, the wastewater is firstly subjected to biochemical treatment, ammonia nitrogen is converted into nitrate nitrogen, the follow-up wastewater mainly contains sodium chloride and sodium nitrate, the follow-up wastewater is directly subjected to evaporative crystallization treatment, and the obtained mixed salt contains a large amount of sodium chloride and sodium nitrate, so that the sodium chloride and sodium nitrate are not effectively recycled, the resource waste is caused, and the operation cost of enterprises is greatly increased.
Disclosure of Invention
The utility model aims to provide a wastewater treatment system capable of efficiently recycling sodium chloride and sodium nitrate in wastewater and high sodium chloride and sodium nitrate.
The utility model discloses a wastewater treatment system for high sodium chloride and sodium nitrate, which comprises an adjusting tank, a high-efficiency sedimentation tank, a sand filtration tank, a ultrafilter, weak acid resin, a decarbonization tower, a reverse osmosis instrument A, nanofiltration equipment, COD (chemical oxygen demand) adsorption resin, tubular membrane equipment, a reverse osmosis instrument C, a triple-effect evaporation crystallizer, a salting-out tank and a dryer; the liquid outlet of the regulating tank is communicated with the liquid inlet of the efficient sedimentation tank through a pipeline; the liquid outlet of the efficient sedimentation tank is communicated with the liquid inlet of the sand filtering tank; the liquid outlet of the sand filtering tank is communicated with the liquid inlet of the ultrafilter; the weak acid resin is arranged on a communication pipeline between a liquid outlet of the ultrafilter and a liquid inlet of the decarburization tower; the liquid outlet of the decarburization tower is communicated with the liquid inlet of the reverse osmosis instrument A; the concentrated water outlet of the reverse osmosis instrument A is communicated with the liquid inlet of the nanofiltration equipment; the COD adsorption resin is arranged on a pipeline of which the water outlet of the nanofiltration equipment is communicated with the liquid inlet of the tubular membrane equipment; the liquid outlet of the tubular membrane equipment is communicated with the liquid inlet of the reverse osmosis instrument C; the concentrated water outlet of the reverse osmosis instrument C is communicated with the liquid inlet of the triple-effect evaporation crystallizer; the liquid outlet of the triple effect evaporation crystallizer is communicated with the liquid inlet of the salt precipitation tank; the liquid outlet of the salt precipitation tank is communicated with the liquid inlet of the dryer; and a discharge hole of the salt precipitation tank is communicated with a feed hole of the sodium chloride storage tank.
Further, the liquid outlet of salting out jar and the inlet intercommunication of flashing jar, the liquid outlet of flashing jar and the inlet intercommunication of sodium nitrate precipitation jar, the discharge gate of sodium nitrate precipitation jar and the feed inlet intercommunication of sodium nitrate storage tank, the mother liquor liquid outlet of sodium nitrate precipitation jar with the inlet intercommunication of desicator.
Further, the device also comprises an evaporation tank, wherein a concentrated water outlet of the nanofiltration device is communicated with a liquid inlet of the evaporation tank through a pipeline; the liquid outlet of the evaporation tank is communicated with the liquid inlet of the dryer; and a discharge hole of the dryer is communicated with a feed hole of the mixed salt storage tank.
Further, the water outlet of the reverse osmosis instrument A is communicated with the water outlet of the reverse osmosis instrument C through a pipeline; the water outlet of the reverse osmosis instrument D is communicated with the liquid inlet of the reuse water tank; and a concentrated water outlet of the reverse osmosis instrument D is communicated with a liquid inlet of the reverse osmosis instrument A.
Further, the reverse osmosis instrument A and the reverse osmosis instrument D adopt brackish water films, the nanofiltration equipment adopts low-pressure nanofiltration films, and the reverse osmosis instrument C adopts a sea water desalination film and a high-pressure reverse osmosis film.
Furthermore, an ultrafiltration membrane element of the ultrafiltration machine adopts a ceramic ultrafiltration membrane.
Further, the device also comprises sludge treatment equipment, wherein the tubular membrane equipment and the discharge port of the efficient sedimentation tank are both communicated with the feed inlet of the sludge treatment equipment, and the liquid outlet of the sludge treatment system is communicated with the liquid inlet of the regulating tank.
Further, the sludge treatment apparatus may be a filter press or a centrifuge.
The utility model has the advantages that: the system of the utility model further removes the silicon in the front concentrated water by adopting tubular membrane equipment, thereby guaranteeing the long-term operation of the later evaporation and the second-stage reverse osmosis. And the reverse osmosis instrument D is added to perform secondary reverse osmosis, so that the water is further concentrated, the evaporation scale is reduced, and the investment is reduced. Meanwhile, sulfate radical and organic matters in water are intercepted by adopting nanofiltration equipment, factors affecting the purity and evaporation capacity of salt products are intercepted to the positions of mixed salt, and finally sodium chloride and sodium nitrate with higher quality are produced; firstly separating out sodium chloride through a triple effect evaporator and a salt precipitation tank, and then separating out sodium nitrate through a flash tank and a sodium nitrate precipitation tank, so that the separate separation of sodium chloride and sodium nitrate is realized.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow diagram of the system of the present utility model.
In the figure: the device comprises a regulating tank 1, a high-efficiency sedimentation tank 2, a sand filtration tank 3, an ultrafilter 4, weak acid resin 5, a decarburization tower 6, a reverse osmosis instrument A7, nanofiltration equipment 8, COD adsorption resin 9, tubular membrane equipment 10, a reverse osmosis instrument C11, a triple-effect evaporation crystallizer 12, a salting-out tank 13, a flash tank 14, a sodium nitrate precipitation tank 15, an evaporation tank 16, a dryer 17, a reverse osmosis instrument D18, a recycling water tank 19, a sodium chloride storage tank 20, a sodium nitrate storage tank 21, a mixed salt storage tank 22 and a filter press 23.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, a wastewater treatment system for high sodium chloride and sodium nitrate comprises a regulating tank 1, a high-efficiency sedimentation tank 2, a sand filtration tank 3, an ultrafilter 4, weak acid resin 5, a decarburization tower 6, a reverse osmosis instrument A7, a nanofiltration device 8, COD adsorption resin 9, a tubular membrane device 10, a reverse osmosis instrument C11, a triple-effect evaporation crystallizer 12, a salting-out tank 13, a flash tank 14, a sodium nitrate precipitation tank 15, an evaporation tank 16, a reverse osmosis instrument D18, a dryer 17 and a filter press 23; the liquid outlet of the regulating tank 1 is communicated with the liquid inlet of the high-efficiency sedimentation tank 2 through a pipeline, and the liquid outlet of the high-efficiency sedimentation tank 2 is communicated with the liquid inlet of the sand filtration tank 3; the liquid outlet of the sand filter tank 3 is communicated with the liquid inlet of the ultrafilter 4, and the ultrafilter membrane element of the ultrafilter 4 adopts a ceramic ultrafilter membrane. The weak acid resin 5 is arranged on a communicating pipeline between the liquid outlet of the ultrafilter 4 and the liquid inlet of the decarburization tower 6, and the weak acid resin 5 can reduce the hardness of water. The liquid outlet of the decarburization tower 6 is communicated with the liquid inlet of a reverse osmosis instrument A7, the reverse osmosis instrument A7 adopts a brackish water film, the concentrated water liquid outlet of the reverse osmosis instrument A7 is communicated with the liquid inlet of a nanofiltration device 8, and the nanofiltration device 8 adopts a low-pressure nanofiltration film; and a COD adsorption resin 9 is arranged on a pipeline of the nanofiltration equipment 8, wherein the water outlet of the pipeline is communicated with the liquid inlet of the tubular membrane equipment 10, so as to reduce the COD content in water. The liquid outlet of the tubular membrane device 10 is communicated with the liquid inlet of a reverse osmosis instrument C11, and the reverse osmosis instrument C11 adopts a sea water desalination membrane and a high-pressure reverse osmosis membrane; the concentrated water outlet of the reverse osmosis instrument C11 is communicated with the liquid inlet of the triple-effect evaporation crystallizer 12; the liquid outlet of the triple effect evaporation crystallizer 12 is communicated with the liquid inlet of the salt precipitation tank 13; the discharge port of the salting-out tank 13 is communicated with the feed port of the sodium chloride storage tank 20; the liquid outlet of the salting-out tank 13 is communicated with the liquid inlet of the flash tank 14, the liquid outlet of the flash tank 14 is communicated with the liquid inlet of the sodium nitrate precipitation tank 15, the discharge outlet of the sodium nitrate precipitation tank 15 is communicated with the liquid inlet of the sodium nitrate storage tank 21, and the mother liquor outlet of the sodium nitrate precipitation tank 15 is communicated with the liquid inlet of the dryer 17.
The concentrated water outlet of the nanofiltration device 8 is communicated with the liquid inlet of the evaporation tank 16 through a pipeline; the liquid outlet of the evaporation tank 16 is communicated with the liquid inlet of the dryer 17; the discharge port of the dryer 17 is communicated with the feed port of the mixed salt storage tank 22.
The water outlet of the reverse osmosis instrument A7 and the water outlet of the reverse osmosis instrument C11 are communicated with the liquid inlet of the reverse osmosis instrument D18 through pipelines, the water outlet of the reverse osmosis instrument D18 is communicated with the liquid inlet of the recycling water pool 19, the concentrated water outlet of the reverse osmosis instrument D18 is communicated with the liquid inlet of the reverse osmosis instrument A7, and the reverse osmosis instrument D18 adopts a brackish water film.
The discharge ports of the tubular membrane equipment 10 and the high-efficiency sedimentation tank 2 are communicated with the feed inlet of the filter press 23, and the liquid outlet of the filter press 23 is communicated with the liquid inlet of the regulating tank 1.
Working principle:
(1) Firstly, entering water into an adjusting tank 1, controlling the reaction pH value to be 11, adding caustic soda and sodium carbonate into the adjusting tank 1, respectively reacting for about 25min, then generating floccules through a coagulant and a flocculant, reacting for about 5min, reacting for about 25min, and then precipitating by high-efficiency precipitation to remove suspended matters, wherein the surface load of the high-efficiency precipitation is more than or equal to 8m/h; the operation reduces the hardness of the wastewater and the content of silicon, so that the concentration of calcium ions in the water is reduced to 40mg/L from the original 150mg/L, the concentration of magnesium ions in the water is reduced to 1mg/L from the original 30mg/L, and the content of silicon is reduced to 40mg/L from the original 100mg/L, thereby ensuring the operation of a subsequent membrane system.
(2) The effluent of the high-efficiency sedimentation tank 2 enters a sand filtering tank 3 for sand filtering, and the sand filtering tank 3 is sequentially filled with quartz sand with the grain diameter of 1.5-3 mm, quartz sand with the grain diameter of 0.7m and 0.7-1.5 mm and quartz sand with the effective grain diameter of 0.25-0.75 mm, wherein the height of the quartz sand is 0.2m from top to bottom; filtering the sand filtered water in an ultrafilter 4 to remove suspended matters and colloid which are not completely precipitated; the ultrafiltration membrane is made of domestic Haichuan and Jiuwu Gaoke brand.
(3) The ultrafiltration effluent sequentially enters a weak acid resin 5 and a decarbonization tower 6, so that the hardness and alkalinity of the water are further reduced; the weak acid resin 5 is blue, striving for light, and pergola brand.
(4) The decarbonized effluent enters a reverse osmosis instrument A7 for concentration, so that the scale of a subsequent device is reduced; reverse osmosis apparatus A7 is made of Dow, dongli and Haideneng products.
(5) The concentrated water of the reverse osmosis instrument A7 enters nanofiltration equipment 8 for nanofiltration, sulfate radicals and organic matters in the water are intercepted by a low-pressure nanofiltration membrane, and the purity of sodium chloride and sodium nitrate and the stable operation of an evaporation system are ensured; the nanofiltration device 8 adopts Suiyshi, haideneng and Toli products.
(6) After nanofiltration interception, part of small molecular organic matters exist on the nanofiltration water production side, and the nanofiltration water production further reduces the content of the organic matters in the water through the COD (chemical oxygen demand) adsorption resin 9; the COD adsorption resin 9 adopts the brand of Baolinite and Dusheng products.
(7) The effluent enters the tubular membrane equipment 10 for removing silicon, the silicon (the content is about 40 mg/L) concentrated at the front end is further removed, the content of the removed silicon is reduced to 20mg/L, and the long-term operation of later evaporation and reverse osmosis is ensured; tubular membranes are available under the brand name DFOLW.
(8) The silicon-removed effluent of the tubular membrane equipment 10 enters a reverse osmosis instrument C11 for further concentration, so that the evaporation scale is reduced, the investment is reduced, and after the concentrated water of the reverse osmosis instrument C11 enters a triple-effect evaporation crystallizer 12 for concentration, sodium chloride crystal salt is separated out through a salt precipitation tank 13; the reverse osmosis instrument C11 adopts the products of Dow, dongli and Haideneng.
(9) Then the liquid from the salting-out tank 13 is flashed and cooled through the flash tank 14, at this time, the solubility of sodium nitrate is reduced, the solubility of sodium chloride is increased, sodium nitrate crystal salt is concentrated and precipitated through the sodium nitrate precipitation tank 15, and part of mother liquor is discharged to a mixed salt drying system at regular intervals.
(10) The concentrated water produced after nanofiltration mainly comprises mixed salt of sodium chloride, sodium sulfate and sodium nitrate and organic matters, the salt cannot be separated in the part, and the mixed salt is evaporated and enters a dryer 17 to separate out mixed salt.
(11) The sodium nitrate of the incoming water is higher, and meanwhile, the rejection rate of reverse osmosis to nitrate is lower (70% -80%), so that the nitrate concentration in the produced water is too high, the COD is higher, the produced water cannot supplement the circulating water and a desalination water station, and the waste of resources is easy to cause, so that the reverse osmosis instrument D18 is arranged on the water producing side of the reverse osmosis instrument A and the reverse osmosis instrument C11 for secondary reverse osmosis treatment, and the recycling of the produced water is ensured; reverse osmosis apparatus D18 is made of Dow, dongli, and Haideneng products.
The incoming water is treated by the flow, so that sodium chloride and sodium nitrate are separated out in a grading way, meanwhile, the produced sodium nitrate has higher economic benefit, and the selling price of sodium nitrate per ton of byproducts is about 2000 yuan, so that the operation cost of the whole project can be greatly deducted.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (8)
1. The wastewater treatment system for high sodium chloride and sodium nitrate is characterized by comprising an adjusting tank, a high-efficiency sedimentation tank, a sand filtration tank, a ultrafilter, weak acid resin, a decarbonization tower, a reverse osmosis instrument A, nanofiltration equipment, COD (chemical oxygen demand) adsorption resin, tubular membrane equipment, a reverse osmosis instrument C, a triple-effect evaporation crystallizer, a salt precipitation tank and a dryer;
the liquid outlet of the regulating tank is communicated with the liquid inlet of the efficient sedimentation tank through a pipeline; the liquid outlet of the efficient sedimentation tank is communicated with the liquid inlet of the sand filtering tank; the liquid outlet of the sand filtering tank is communicated with the liquid inlet of the ultrafilter; the weak acid resin is arranged on a communication pipeline between a liquid outlet of the ultrafilter and a liquid inlet of the decarburization tower; the liquid outlet of the decarburization tower is communicated with the liquid inlet of the reverse osmosis instrument A; the concentrated water outlet of the reverse osmosis instrument A is communicated with the liquid inlet of the nanofiltration equipment; the COD adsorption resin is arranged on a pipeline of which the water outlet of the nanofiltration equipment is communicated with the liquid inlet of the tubular membrane equipment; the liquid outlet of the tubular membrane equipment is communicated with the liquid inlet of the reverse osmosis instrument C; the concentrated water outlet of the reverse osmosis instrument C is communicated with the liquid inlet of the triple-effect evaporation crystallizer; the liquid outlet of the triple effect evaporation crystallizer is communicated with the liquid inlet of the salt precipitation tank; the liquid outlet of the salt precipitation tank is communicated with the liquid inlet of the dryer; and a discharge hole of the salt precipitation tank is communicated with a feed hole of the sodium chloride storage tank.
2. The wastewater treatment system of high sodium chloride and sodium nitrate according to claim 1, wherein the liquid outlet of the salt precipitation tank is communicated with the liquid inlet of the flash tank, the liquid outlet of the flash tank is communicated with the liquid inlet of the sodium nitrate precipitation tank, the liquid outlet of the sodium nitrate precipitation tank is communicated with the liquid inlet of the sodium nitrate storage tank, and the mother liquid outlet of the sodium nitrate precipitation tank is communicated with the liquid inlet of the dryer.
3. The wastewater treatment system with high sodium chloride and sodium nitrate according to claim 1, further comprising an evaporation tank, wherein a concentrated water outlet of the nanofiltration device is communicated with a liquid inlet of the evaporation tank through a pipeline; the liquid outlet of the evaporation tank is communicated with the liquid inlet of the dryer; and a discharge hole of the dryer is communicated with a feed hole of the mixed salt storage tank.
4. The wastewater treatment system with high sodium chloride and sodium nitrate according to claim 1, wherein the water outlet of the reverse osmosis instrument A and the water outlet of the reverse osmosis instrument C are communicated with the liquid inlet of the reverse osmosis instrument D through pipelines; the water outlet of the reverse osmosis instrument D is communicated with the liquid inlet of the reuse water tank; and a concentrated water outlet of the reverse osmosis instrument D is communicated with a liquid inlet of the reverse osmosis instrument A.
5. The wastewater treatment system of high sodium chloride and sodium nitrate according to any one of claims 1-4, wherein the reverse osmosis instrument A and the reverse osmosis instrument D adopt brackish water films, the nanofiltration equipment adopts low-pressure nanofiltration films, and the reverse osmosis instrument C adopts a seawater desalination film and a high-pressure reverse osmosis film.
6. The wastewater treatment system of high sodium chloride and sodium nitrate according to claim 1, wherein an ultrafiltration membrane element of the ultrafilter adopts a ceramic ultrafiltration membrane.
7. The wastewater treatment system with high sodium chloride and sodium nitrate according to claim 1, further comprising sludge treatment equipment, wherein the discharge ports of the tubular membrane equipment and the high-efficiency sedimentation tank are communicated with the feed inlet of the sludge treatment equipment, and the liquid outlet of the sludge treatment equipment is communicated with the liquid inlet of the regulating tank.
8. The high sodium chloride, sodium nitrate wastewater treatment system of claim 7, wherein the sludge treatment facility is a filter press or a centrifuge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321062951.2U CN220703439U (en) | 2023-05-04 | 2023-05-04 | High sodium chloride, sodium nitrate's wastewater treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321062951.2U CN220703439U (en) | 2023-05-04 | 2023-05-04 | High sodium chloride, sodium nitrate's wastewater treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN220703439U true CN220703439U (en) | 2024-04-02 |
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|---|---|---|---|
| CN202321062951.2U Active CN220703439U (en) | 2023-05-04 | 2023-05-04 | High sodium chloride, sodium nitrate's wastewater treatment system |
Country Status (1)
| Country | Link |
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| CN (1) | CN220703439U (en) |
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2023
- 2023-05-04 CN CN202321062951.2U patent/CN220703439U/en active Active
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