CN114751575A - High-salt water zero-emission treatment system without generating miscellaneous salt - Google Patents
High-salt water zero-emission treatment system without generating miscellaneous salt Download PDFInfo
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- CN114751575A CN114751575A CN202210439092.8A CN202210439092A CN114751575A CN 114751575 A CN114751575 A CN 114751575A CN 202210439092 A CN202210439092 A CN 202210439092A CN 114751575 A CN114751575 A CN 114751575A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 340
- 150000003839 salts Chemical class 0.000 title claims abstract description 28
- 238000001728 nano-filtration Methods 0.000 claims abstract description 126
- 238000004062 sedimentation Methods 0.000 claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 claims abstract description 38
- 239000010802 sludge Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000001223 reverse osmosis Methods 0.000 claims description 156
- 239000012528 membrane Substances 0.000 claims description 57
- 238000002425 crystallisation Methods 0.000 claims description 40
- 230000008025 crystallization Effects 0.000 claims description 40
- 239000000047 product Substances 0.000 claims description 36
- 230000008014 freezing Effects 0.000 claims description 28
- 238000007710 freezing Methods 0.000 claims description 28
- 238000003825 pressing Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 18
- 239000012452 mother liquor Substances 0.000 claims description 18
- 239000002351 wastewater Substances 0.000 claims description 18
- 230000003647 oxidation Effects 0.000 claims description 16
- 238000007254 oxidation reaction Methods 0.000 claims description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- 239000006004 Quartz sand Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003830 anthracite Substances 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 208000028659 discharge Diseases 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 8
- 238000012545 processing Methods 0.000 description 4
- 239000012267 brine Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010446 mirabilite Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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Classifications
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- 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
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention relates to the field of water treatment, in particular to a high-salt water zero-discharge treatment system without generating miscellaneous salts. A high-salinity water zero-emission treatment system without generating miscellaneous salts comprises a treatment system body, wherein the treatment system body comprises a high-density sedimentation tank and a sludge concentration tank, and the high-density sedimentation tank is arranged on one side of the sludge concentration tank; the high-density sedimentation tank is connected with the high-density pond water production tank, the high-density pond water production tank is connected with the multi-medium filter, the multi-medium filter is connected with the multi-medium water tank, the multi-medium water tank is connected with the first nanofiltration device, and the first nanofiltration device is connected with the first nanofiltration water production tank and the first nanofiltration concentrated water tank. The invention replaces the traditional high-salinity wastewater treatment process by the design, achieves the effects of cost reduction and efficiency improvement, does not generate dangerous waste miscellaneous salts, avoids the miscellaneous salt treatment cost and is beneficial to environmental protection.
Description
Technical Field
The invention relates to the field of water treatment, in particular to a high-salt water zero-emission treatment system without generating miscellaneous salts.
Background
The shortage of water resources is an important problem faced by the current society, and along with the continuous development of social economy, chemical industryA certain amount of high-salinity wastewater is generated during industrial production such as coal-electricity and coking, the quality of the high-salinity wastewater is complex, the salt content of the high-salinity wastewater is about 1 to 1.5 percent, and the high-salinity wastewater also comprises high-content Cl-、SO42-The direct discharge of ions harmful to the natural environment pollutes the environment, in order to increase the recycling of water resources, the resource utilization of a zero-emission technology becomes more and more important, however, the treatment cost of the existing treatment process for high-salt wastewater is high, the treatment process is complicated, the high-salt wastewater can be recycled after being discharged through the cyclic treatment of equipment such as a wastewater adjusting tank, a reaction tank, a high-density sedimentation tank, a pH adjusting tank, an ozone reaction tank, an aeration biological filter tank, a clean water tank, a multi-medium filter, an ultrafiltration device, a softening bed, a safety filter, a plurality of reverse osmosis devices, a plurality of evaporation devices and the like, and in the process, regenerated wastewater, solid waste which needs to be treated additionally, residual mother liquor which is evaporated and the like can be generated, so that the existing treatment process for the high-salt wastewater can not achieve a better treatment effect and can not meet the requirements of people.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The invention aims to provide a high-salt water zero-emission treatment system without generating miscellaneous salt so as to solve at least one technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-brine zero-emission treatment system without generating miscellaneous salt comprises a treatment system body, and is characterized in that the treatment system body comprises a high-density sedimentation tank and a sludge concentration tank for storing sludge generated by the high-density sedimentation tank, wherein the high-density sedimentation tank is arranged on one side of the sludge concentration tank;
the high-density sedimentation tank is connected with a high-density tank water production tank, the high-density tank water production tank is connected with a multi-medium filter, the multi-medium filter is connected with a multi-medium water tank, the multi-medium water tank is connected with a first nanofiltration device, and the first nanofiltration device is connected with a first nanofiltration water production tank and a first nanofiltration concentrated water tank;
the first nanofiltration water production tank is connected with a first RO membrane device, the first RO membrane device is connected with a first RO concentrated water tank and a reverse osmosis device, the first RO concentrated water tank is connected with a second RO membrane device, the second RO membrane device is connected with a second RO concentrated water tank and the reverse osmosis device, the second RO concentrated water tank is connected with a second nanofiltration device, the second nanofiltration device is connected with a second nanofiltration water production tank and the multi-medium water tank, the second nanofiltration water production tank is connected with an evaporative crystallization device, the evaporative crystallization device is connected with a mother liquor tank, and the mother liquor tank is connected with the second RO concentrated water tank;
the first RO concentrated water tank is connected with a third RO membrane device, the third RO membrane device is connected with the third RO concentrated water tank and the reverse osmosis device, the third RO concentrated water tank is connected with the third nanofiltration device, and the third nanofiltration device is connected with the oxidation device and the second RO concentrated water tank;
the reverse osmosis device is connected with a reclaimed water reuse water tank and the third RO membrane device;
one side of the sludge concentration tank is provided with a filter pressing device for filter pressing the sludge in the oxidation device and the sludge concentration tank, the filter pressing device is connected with a freezing crystallization device, and the freezing crystallization device is connected with the high-density sedimentation tank.
The treatment system body comprises a wastewater adjusting tank for mixing and homogenizing, and the wastewater adjusting tank is connected with a high-density sedimentation tank.
The multi-medium filter is connected with the high-density sedimentation tank.
One side of the evaporative crystallization device is provided with a first centrifuge for processing precipitates of the evaporative crystallization device. And one side of the freezing and crystallizing device is provided with a second centrifuge for processing precipitates of the freezing and crystallizing device. And a settling tank for treating centrifugal mother liquor is arranged on one side of the second centrifugal machine, and the settling tank is connected with the oxidation device and the freezing crystallization device.
High-salinity water is placed in the high-density sedimentation tank, the produced water of the high-density sedimentation tank enters a high-density tank water production tank, and sludge produced by the high-density sedimentation tank is sent to a sludge concentration tank;
the water in the high-density pond water production tank enters a multi-medium filter, the water produced by the multi-medium filter enters a multi-medium water pond, the water in the multi-medium water pond enters a first nanofiltration device and produces first nanofiltration water and first nanofiltration concentrated water, and the first nanofiltration water and the first nanofiltration concentrated water are respectively sent into a first nanofiltration water production tank and a first nanofiltration concentrated water tank;
the first nanofiltration product water in the first nanofiltration product water tank enters a first RO membrane device and produces first RO product water and first RO concentrated water, the first RO product water and the first RO concentrated water are respectively sent into a reverse osmosis device and the first RO concentrated water tank, the first RO concentrated water in the first RO concentrated water tank enters a second RO membrane device and produces second RO product water and second RO concentrated water, the second RO product water and the second RO concentrated water are respectively sent into the reverse osmosis device and the second RO concentrated water tank, the second RO concentrated water in the second RO concentrated water tank enters a second nanofiltration device and produces second nanofiltration product water and second nanofiltration concentrated water, the second nanofiltration product water and the second nanofiltration concentrated water are respectively sent into the second nanofiltration product water tank and a multi-medium water tank, the second nanofiltration product water in the second nanofiltration product water tank is sent into an evaporative crystallization device to produce evaporative crystallization water and sodium chloride, and the evaporative crystallization product water is sent into a mother liquor, then sending the water in the mother liquor tank into a second RO concentrated water tank;
the first nanofiltration concentrated water in the first nanofiltration concentrated water tank enters a third RO membrane device and generates third RO produced water and third RO concentrated water, the third RO produced water and the third RO concentrated water are respectively sent into a reverse osmosis device and the third RO concentrated water tank, the third RO concentrated water in the third RO concentrated water tank enters a third nanofiltration device and generates third nanofiltration produced water and third nanofiltration concentrated water, and the third nanofiltration produced water and the third nanofiltration concentrated water are respectively sent into a second RO concentrated water tank and an oxidation device;
the water entering the reverse osmosis device is treated by the reverse osmosis device to form reverse osmosis produced water and reverse osmosis concentrated water, and the reverse osmosis produced water and the reverse osmosis concentrated water are respectively sent to a reclaimed water recycling water tank and the third RO membrane device;
and (3) feeding the sewage discharged by the oxidation device and sludge in the sludge concentration tank into a filter pressing device for filter pressing, producing sludge and filter pressing production water, feeding the filter pressing production water into a freezing crystallization device, producing freezing crystallization production water and sodium sulfate decahydrate, and feeding the freezing crystallization production water into a high-density sedimentation tank.
Through the design, the invention provides the high-salt water zero-discharge treatment system without generating the miscellaneous salt, so as to replace the traditional high-salt wastewater treatment process, achieve the effects of reducing cost and improving efficiency, generate no dangerous waste miscellaneous salt, avoid the generation of miscellaneous salt treatment cost and be beneficial to environmental protection.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a high-brine zero-emission treatment system without generating miscellaneous salts comprises a treatment system body, wherein the treatment system body comprises a high-density sedimentation tank 1 and a sludge concentration tank 2 for storing sludge generated by the high-density sedimentation tank, and the high-density sedimentation tank is arranged on one side of the sludge concentration tank; the high-density sedimentation tank is connected with a high-density tank water production tank 3, the high-density tank water production tank is connected with a multi-medium filter 4, the multi-medium filter is connected with a multi-medium water tank 5, the multi-medium water tank is connected with a first nanofiltration device 6, and the first nanofiltration device is connected with a first nanofiltration water production tank 7 and a first nanofiltration concentrated water tank 8; the first nanofiltration water production tank is connected with a first RO membrane device 9, the first RO membrane device is connected with a first RO concentrated water tank 10 and a reverse osmosis device 11, the first RO concentrated water tank is connected with a second RO membrane device 12, the second RO membrane device is connected with a second RO concentrated water tank 13 and the reverse osmosis device, the second RO concentrated water tank is connected with a second nanofiltration device 14, the second nanofiltration device is connected with a second nanofiltration water production tank 15 and a multi-medium water tank, the second nanofiltration water production tank is connected with an evaporative crystallization device 16, the evaporative crystallization device is connected with a mother liquor tank 17, and the mother liquor tank is connected with the second RO concentrated water tank; the first nanofiltration concentrated water tank is connected with a third RO membrane device 18, the third RO membrane device is connected with a third RO concentrated water tank 19 and a reverse osmosis device, the third RO concentrated water tank is connected with a third nanofiltration device 20, and the third nanofiltration device is connected with an oxidation device 21 and a second RO concentrated water tank; the reverse osmosis device is connected with the reclaimed water reuse water tank 22 and the third RO membrane device; one side of the sludge concentration tank is provided with a filter pressing device 23 for filter pressing the sewage of the oxidation device and the sludge in the sludge concentration tank, the filter pressing device is connected with a freezing crystallization device 24, and the freezing crystallization device is connected with a high-density sedimentation tank. Through the design, the invention provides the high-salt water zero-discharge treatment system without generating the miscellaneous salt, so as to replace the traditional high-salt wastewater treatment process, achieve the effects of reducing cost and improving efficiency, generate no dangerous waste miscellaneous salt, avoid the generation of miscellaneous salt treatment cost and be beneficial to environmental protection.
The treatment system body comprises a wastewater adjusting tank for mixing and homogenizing, and the wastewater adjusting tank is connected with a high-density sedimentation tank. High-salinity wastewater generated in a plant area can enter a wastewater adjusting tank for mixing and homogenizing and then enter a high-density sedimentation tank.
The multi-medium filter is connected with the high-density sedimentation tank. The water for cleaning the multi-medium filter is conveniently returned to the high-density sedimentation tank. An upper filter material layer and a lower filter material layer are arranged in the multi-media filter, the upper filter material layer adopts an anthracite filter material layer, and the lower filter material layer adopts a quartz sand filter material layer. The multi-medium filter utilizes two filter materials of quartz sand and anthracite to remove suspended matters in raw water, and when water flows through a filter material layer of the multi-medium filter, gaps of the filter material play a role in screening the suspended matters, so that the suspended matters are easy to intercept on the surface of the filter material. When a certain amount of dirt is intercepted on the surface layer of the filter material to form the filter membrane, the pressure difference between the front and the back of the filter will rise rapidly along with the time until the filter membrane fails, at the moment, the filter material needs to be backwashed by reverse water flow, so that the quartz sand and the smokeless coal layer in the filter are suspended and loosened, and therefore the intercepted matters adhered to the surfaces of the quartz sand and the smokeless coal are peeled off and taken away by the water flow, and the filtering function is recovered.
In order to ensure the use effect of the treatment system body, the first nanofiltration water production tank is connected with the first RO membrane device through a pipeline, and a first booster pump is arranged on the pipeline for connecting the first nanofiltration water production tank and the first RO membrane device; the first RO concentrated water tank is connected with the second RO membrane device through a pipeline, and a second booster pump is arranged on the pipeline for connecting the first RO concentrated water tank with the second RO membrane device. The first nanofiltration concentrated water tank is connected with the third RO membrane device through a pipeline, and a third booster pump is arranged on the pipeline for connecting the first nanofiltration concentrated water tank and the third RO membrane device; the third RO concentrated water tank is connected with the third nanofiltration device through a pipeline, and a fourth booster pump is arranged on the pipeline used for connecting the third RO concentrated water tank with the third nanofiltration device.
One side of the evaporative crystallization device is provided with a first centrifuge 25 for processing precipitates in the evaporative crystallization device, so that the moisture in the crystal slurry precipitated by the evaporative crystallization device can be further removed by the first centrifuge. The second centrifuge 26 for processing the precipitate of the freezing and crystallizing device is arranged at one side of the freezing and crystallizing device, so that the moisture in the crystal slurry precipitated by the freezing and crystallizing device can be further removed by the second centrifuge. And one side of the second centrifugal machine is provided with a settling tank for treating centrifugal mother liquor, and the settling tank is connected with the oxidation device and the freezing crystallization device.
When the design is in operation, high-salinity water produced in a plant area is placed into a high-density sedimentation tank, the produced water of the high-density sedimentation tank enters a high-density tank water production tank, and sludge produced by the high-density sedimentation tank is sent into a sludge concentration tank; water in the high-density pond water production tank enters a multi-medium filter, water produced by the multi-medium filter enters a multi-medium water pond, water in the multi-medium water pond enters a first nanofiltration device and produces first nanofiltration water and first nanofiltration concentrated water, and the first nanofiltration water and the first nanofiltration concentrated water are respectively sent into a first nanofiltration water production tank and a first nanofiltration concentrated water tank; the first nanofiltration product water in the first nanofiltration product water tank enters a first RO membrane device and produces first RO product water and first RO concentrated water, the first RO product water and the first RO concentrated water are respectively sent into a reverse osmosis device and the first RO concentrated water tank, the first RO concentrated water in the first RO concentrated water tank enters a second RO membrane device and produces second RO product water and second RO concentrated water, the second RO product water and the second RO concentrated water are respectively sent into the reverse osmosis device and the second RO concentrated water tank, the second RO concentrated water in the second RO concentrated water tank enters a second nanofiltration device and produces second nanofiltration product water and second nanofiltration concentrated water, the second nanofiltration product water and the second nanofiltration concentrated water are respectively sent into the second RO product water tank and a multi-medium water tank, the second nanofiltration product water in the second nanofiltration product water tank is sent into an evaporative crystallization device to evaporate, crystallize product water and sodium chloride, the evaporate, crystallize product water is sent into a mother liquor tank, and then the RO concentrated water in the mother liquor tank is sent into a RO concentrated water tank; the first nanofiltration concentrated water in the first nanofiltration concentrated water tank enters a third RO membrane device and generates third RO produced water and third RO concentrated water, the third RO produced water and the third RO concentrated water are respectively sent into a reverse osmosis device and the third RO concentrated water tank, the third RO concentrated water in the third RO concentrated water tank enters a third nanofiltration device and generates third nanofiltration produced water and third nanofiltration concentrated water, and the third nanofiltration produced water and the third nanofiltration concentrated water are respectively sent into a second RO concentrated water tank and an oxidation device; the water entering the reverse osmosis device is treated by the reverse osmosis device to form reverse osmosis produced water and reverse osmosis concentrated water, and the reverse osmosis produced water and the reverse osmosis concentrated water are respectively sent to a reclaimed water recycling water tank and a third RO membrane device; and (3) feeding the sewage discharged by the oxidation device and the sludge in the sludge concentration tank into a filter pressing device for filter pressing and producing sludge and filter pressing produced water, feeding the filter pressing produced water into a freezing crystallization device for producing freezing crystallization produced water and sodium sulfate decahydrate, and feeding the freezing crystallization produced water into a high-density sedimentation tank. The high-salt water stored in the high-density sedimentation tank generates calcium carbonate sediment from calcium in the water through a double-alkali method, and the hardness of the high-salt water is reduced.
According to the invention, calcium in water in the high-density sedimentation tank is enabled to generate calcium carbonate sediment by using a double-alkali method, so that the hardness of the wastewater is reduced; the water produced by the high-density sedimentation tank enters a multi-media filter to remove organic matters and mud, the water produced by the multi-media filter enters a first nanofiltration device, the water produced by the first nanofiltration device enters a first RO (reverse osmosis) membrane device and is subjected to subsequent treatment to finally produce sodium chloride, the concentrated water produced by the first nanofiltration device enters a third RO membrane device and is subjected to subsequent treatment to finally produce mirabilite, and the water produced by the first RO membrane device, the second RO membrane device and the third RO membrane device in the system is treated by the reverse osmosis device to produce water for recycling. The multi-medium filter and the first nanofiltration device filter and soften water, the reverse osmosis device can adopt a fourth RO membrane device, the reverse osmosis device is used as a second-level RO system in the treatment system body, the produced water of the first RO membrane device, the second RO membrane device and the third RO membrane device can be treated to form reverse osmosis produced water and reverse osmosis concentrated water, the reverse osmosis concentrated water is sent back to the third RO membrane device to be treated continuously, and the reverse osmosis produced water is used as reclaimed water for recycling, so that resources are saved. The concentrated water produced by the third nanofiltration device in the treatment system body is firstly subjected to oxidation device to remove organic matters in water, and is subjected to filter pressing by the filter pressing device to be used as mother liquor of the freezing crystallization device, sludge generated by filter pressing of the filter pressing device is transported outwards, the freezing crystallization water produced by the mother liquor after being treated by the freezing crystallization device is sent back to the high-density sedimentation tank, and the whole process does not generate miscellaneous salts, is economical and practical and has high environmental protection value.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high-salinity water zero-emission treatment system without generating miscellaneous salts comprises a treatment system body, and is characterized in that the treatment system body comprises a high-density sedimentation tank and a sludge concentration tank for storing sludge generated by the high-density sedimentation tank, wherein the high-density sedimentation tank is arranged on one side of the sludge concentration tank;
the high-density sedimentation tank is connected with a high-density tank water production tank, the high-density tank water production tank is connected with a multi-medium filter, the multi-medium filter is connected with a multi-medium water tank, the multi-medium water tank is connected with a first nanofiltration device, and the first nanofiltration device is connected with a first nanofiltration water production tank and a first nanofiltration concentrated water tank;
the first nanofiltration water production tank is connected with a first RO membrane device, the first RO membrane device is connected with a first RO concentrated water tank and a reverse osmosis device, the first RO concentrated water tank is connected with a second RO membrane device, the second RO membrane device is connected with a second RO concentrated water tank and the reverse osmosis device, the second RO concentrated water tank is connected with a second nanofiltration device, the second nanofiltration device is connected with a second nanofiltration water production tank and the multi-medium water tank, the second nanofiltration water production tank is connected with an evaporative crystallization device, the evaporative crystallization device is connected with a mother liquor tank, and the mother liquor tank is connected with the second RO concentrated water tank;
the first RO concentrated water tank is connected with a third RO membrane device, the third RO membrane device is connected with the third RO concentrated water tank and the reverse osmosis device, the third RO concentrated water tank is connected with the third nanofiltration device, and the third nanofiltration device is connected with the oxidation device and the second RO concentrated water tank;
the reverse osmosis device is connected with a reclaimed water reuse water tank and the third RO membrane device;
one side of the sludge concentration tank is provided with a filter pressing device for filter pressing the sludge in the oxidation device and the sludge concentration tank, the filter pressing device is connected with a freezing crystallization device, and the freezing crystallization device is connected with the high-density sedimentation tank.
2. The zero-emission treatment system for high-salinity water without generating miscellaneous salts, as claimed in claim 1, wherein the treatment system body comprises a wastewater adjusting tank for mixing and homogenizing, and the wastewater adjusting tank is connected with the high-density sedimentation tank.
3. The zero-emission treatment system of high-salinity water without generating miscellaneous salts, according to claim 1, wherein the multi-media filter is connected with the high-density sedimentation tank.
4. The high-salinity water zero-emission treatment system without generating miscellaneous salts according to claim 1, wherein an upper filter material layer and a lower filter material layer are arranged in the multi-media filter, the upper filter material layer adopts an anthracite filter material layer, and the lower filter material layer adopts a quartz sand filter material layer.
5. The high-salinity water zero-emission treatment system without generating miscellaneous salts according to claim 1, wherein the first nanofiltration water production tank is connected with a first RO membrane device through a pipeline, and a first booster pump is arranged on the pipeline for connecting the first nanofiltration water production tank with the first RO membrane device;
the first RO concentrated water tank is connected with the second RO membrane device through a pipeline, and a second booster pump is arranged on the pipeline for connecting the first RO concentrated water tank with the second RO membrane device;
the first nanofiltration concentrated water tank is connected with a third RO membrane device through a pipeline, and a third booster pump is arranged on the pipeline for connecting the first nanofiltration concentrated water tank and the third RO membrane device;
the third RO concentrated water tank is connected with the third nanofiltration device through a pipeline and is used for connecting the third RO concentrated water tank with a fourth booster pump is arranged on the pipeline of the third nanofiltration device.
6. The high-salinity water zero-emission treatment system without generating miscellaneous salts as claimed in claim 1, wherein a first centrifuge for treating the precipitate from the evaporative crystallization device is provided at one side of the evaporative crystallization device.
7. The high-salinity water zero-emission treatment system without generating miscellaneous salts as claimed in claim 1, wherein a second centrifuge for treating the precipitate of the freezing and crystallizing device is arranged at one side of the freezing and crystallizing device.
8. The zero-emission treatment system of high-salinity water without generating miscellaneous salts as claimed in claim 7, wherein a settling tank for treating mother liquor of centrifugation is arranged at one side of the second centrifuge, and the settling tank connects the oxidation device and the freezing and crystallizing device.
9. The zero-emission treatment system for high-salinity water without generating miscellaneous salts according to any one of claims 1 to 8, characterized in that the high-salinity water is placed into the high-density sedimentation tank, the produced water of the high-density sedimentation tank enters a high-density tank water production tank, and the sludge produced by the high-density sedimentation tank is sent into a sludge concentration tank;
the water in the high-density pond water production tank enters a multi-medium filter, the water produced by the multi-medium filter enters a multi-medium water pond, the water in the multi-medium water pond enters a first nanofiltration device and produces first nanofiltration water and first nanofiltration concentrated water, and the first nanofiltration water and the first nanofiltration concentrated water are respectively sent into a first nanofiltration water production tank and a first nanofiltration concentrated water tank;
the first nanofiltration product water in the first nanofiltration product water tank enters a first RO membrane device and produces first RO product water and first RO concentrated water, the first RO product water and the first RO concentrated water are respectively sent into a reverse osmosis device and the first RO concentrated water tank, the first RO concentrated water in the first RO concentrated water tank enters a second RO membrane device and produces second RO product water and second RO concentrated water, the second RO product water and the second RO concentrated water are respectively sent into the reverse osmosis device and the second RO concentrated water tank, the second RO concentrated water in the second RO concentrated water tank enters a second nanofiltration device and produces second nanofiltration product water and second nanofiltration concentrated water, the second nanofiltration product water and the second nanofiltration concentrated water are respectively sent into the second RO product water tank and a multi-medium water tank, the second nanofiltration product water in the second nanofiltration product water tank is sent into an evaporative crystallization device to produce evaporative crystallization water and sodium chloride, the evaporative crystallization water is sent into a mother liquor tank, and then the RO concentrated water in the mother liquor tank is sent into the second nanofiltration water tank;
the first nanofiltration concentrated water in the first nanofiltration concentrated water tank enters a third RO membrane device and generates third RO produced water and third RO concentrated water, the third RO produced water and the third RO concentrated water are respectively sent into a reverse osmosis device and the third RO concentrated water tank, the third RO concentrated water in the third RO concentrated water tank enters a third nanofiltration device and generates third nanofiltration produced water and third nanofiltration concentrated water, and the third nanofiltration produced water and the third nanofiltration concentrated water are respectively sent into a second RO concentrated water tank and an oxidation device;
the water entering the reverse osmosis device is treated by the reverse osmosis device to form reverse osmosis produced water and reverse osmosis concentrated water, and the reverse osmosis produced water and the reverse osmosis concentrated water are respectively sent to a reclaimed water recycling water tank and the third RO membrane device;
and (3) feeding the sewage discharged by the oxidation device and the sludge in the sludge concentration tank into a filter pressing device for filter pressing and producing sludge and filter pressing produced water, feeding the filter pressing produced water into a freezing crystallization device for producing freezing crystallization produced water and sodium sulfate decahydrate, and feeding the freezing crystallization produced water into a high-density sedimentation tank.
10. The zero-emission treatment system of high-salinity water without generating miscellaneous salts according to claim 9, wherein the high-salinity water stored in the high-density sedimentation tank is subjected to a double alkali method to precipitate calcium in the water to form calcium carbonate, thereby reducing the hardness of the high-salinity water.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017181696A1 (en) * | 2016-04-21 | 2017-10-26 | 广州市心德实业有限公司 | Method for treating and recycling brine wastewater containing sodium chloride and sodium sulfate |
| US20180148350A1 (en) * | 2016-11-29 | 2018-05-31 | China Petroleum & Chemical Corporation | Method and System for Treating Brine Waste Water |
| CN209368040U (en) * | 2018-11-27 | 2019-09-10 | 中煤西安设计工程有限责任公司 | A kind of highly mineralized mine water near-zero release processing and comprehensive resource utilize system |
| CN112079516A (en) * | 2020-10-14 | 2020-12-15 | 南京万德斯环保科技股份有限公司 | Zero-discharge and salt-separation recycling treatment process for high-concentration brine |
| CN214115233U (en) * | 2020-12-04 | 2021-09-03 | 北京朗新明环保科技有限公司 | Negative hard mine water zero-discharge treatment system |
| CN113636702A (en) * | 2021-05-28 | 2021-11-12 | 清创人和生态工程技术有限公司 | Recycling and zero-discharge process for salt-containing organic wastewater |
-
2022
- 2022-04-25 CN CN202210439092.8A patent/CN114751575A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017181696A1 (en) * | 2016-04-21 | 2017-10-26 | 广州市心德实业有限公司 | Method for treating and recycling brine wastewater containing sodium chloride and sodium sulfate |
| US20180148350A1 (en) * | 2016-11-29 | 2018-05-31 | China Petroleum & Chemical Corporation | Method and System for Treating Brine Waste Water |
| CN209368040U (en) * | 2018-11-27 | 2019-09-10 | 中煤西安设计工程有限责任公司 | A kind of highly mineralized mine water near-zero release processing and comprehensive resource utilize system |
| CN112079516A (en) * | 2020-10-14 | 2020-12-15 | 南京万德斯环保科技股份有限公司 | Zero-discharge and salt-separation recycling treatment process for high-concentration brine |
| CN214115233U (en) * | 2020-12-04 | 2021-09-03 | 北京朗新明环保科技有限公司 | Negative hard mine water zero-discharge treatment system |
| CN113636702A (en) * | 2021-05-28 | 2021-11-12 | 清创人和生态工程技术有限公司 | Recycling and zero-discharge process for salt-containing organic wastewater |
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