CN112174412A - Method for recycling reclaimed water in high-salt-content wastewater - Google Patents
Method for recycling reclaimed water in high-salt-content wastewater Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 450
- 239000002351 wastewater Substances 0.000 title claims abstract description 29
- 238000004064 recycling Methods 0.000 title claims abstract description 23
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 233
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 99
- 238000001914 filtration Methods 0.000 claims abstract description 36
- 238000004140 cleaning Methods 0.000 claims abstract description 30
- 230000001105 regulatory Effects 0.000 claims abstract description 22
- 238000010612 desalination reaction Methods 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims description 86
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 239000011780 sodium chloride Substances 0.000 claims description 9
- 210000003660 Reticulum Anatomy 0.000 claims description 8
- 230000000844 anti-bacterial Effects 0.000 claims description 8
- 239000003899 bactericide agent Substances 0.000 claims description 8
- 238000011033 desalting Methods 0.000 claims description 8
- 239000008394 flocculating agent Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 8
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- SUKJFIGYRHOWBL-UHFFFAOYSA-N Sodium hypochlorite Chemical group [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 5
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 5
- 239000000460 chlorine Substances 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 230000001112 coagulant Effects 0.000 claims description 5
- 239000000701 coagulant Substances 0.000 claims description 5
- 238000009295 crossflow filtration Methods 0.000 claims description 5
- XGZRAKBCYZIBKP-UHFFFAOYSA-L disodium;dihydroxide Chemical compound [OH-].[OH-].[Na+].[Na+] XGZRAKBCYZIBKP-UHFFFAOYSA-L 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 239000012510 hollow fiber Substances 0.000 claims description 5
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- 239000003638 reducing agent Substances 0.000 claims description 5
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- 239000001187 sodium carbonate Substances 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 230000003068 static Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
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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
- C02F1/001—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
- C02F1/44—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
- C02F1/444—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
- C02F1/52—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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Abstract
The invention discloses a method for recycling reclaimed water in high-salt-content wastewater, which comprises the following steps: filtering softened raw water, feeding the softened produced water into a softened water producing pool, filtering by a full-automatic filter, feeding into a clean water pool, filtering by a self-cleaning filter, performing ultrafiltration, feeding the obtained ultrafiltration produced water into an ultrafiltration water producing pool, and feeding ultrafiltration concentrated water into a waste liquid collecting pool; the ultrafiltration produced water is lifted by a reverse osmosis booster pump and then enters a reverse osmosis cartridge filter for filtration, the effluent is pressurized by a reverse osmosis high-pressure pump and then enters a reverse osmosis device for desalination, the obtained reverse osmosis produced water enters a regulating water tank, and the reverse osmosis concentrated water enters a reverse osmosis concentrated water tank; the reverse osmosis concentrated water is lifted to a reverse osmosis concentrated water security filter by a reverse osmosis concentrated water booster pump, the outlet water enters a concentrated water reverse osmosis device for desalination after being boosted by a concentrated water high-pressure pump, the obtained produced water enters a regulating reservoir, and the super concentrated water is discharged into a super concentrated water tank; the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration after being pressurized by a PFET booster pump, and the produced water enters a regulating water tank.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for recycling reclaimed water in high-salt wastewater.
Background
In the industrial production processes of petrochemical industry, electric power, coal chemical industry and the like, a large amount of wastewater containing inorganic salts can be generated, the wastewater has high salt content, complex organic matter components and poor biochemical degradation performance, belongs to wastewater with high salt content, and if the wastewater is directly discharged, peripheral soil can be damaged, the salt content of a water body is increased, and mineral resources are wasted. Therefore, the realization of brine separation and recycling of industrial high-salinity wastewater is not only the development trend of various industries but also the inevitable requirement of environmental protection. At present, the most common treatment methods for high-salinity wastewater include: multi-stage evaporation, multi-effect flash evaporation, biochemical treatment and the like, however, because the salt content in the high-salinity wastewater is higher, the existing treatment method has the defects of high operating cost, poor treatment effect, low water yield, unstable effluent and the like, and the range of reclaimed water reuse is influenced.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for recycling reclaimed water in high-salt-content wastewater, which has the advantages of low cost, safe operation, simple and convenient maintenance, stable and good quality of effluent, high water yield and small occupied area.
The invention provides a method for recycling reclaimed water in high-salt-content wastewater, which comprises the following steps:
s1, softening the raw water collected by the collecting tank in a softening device, filtering, and feeding the obtained softened water into a softened water producing pool;
s2, filtering the softened water in the softened water producing pool by a full-automatic filter and then feeding the softened water into a clean water pool;
s3, filtering the produced water in the clean water tank by a self-cleaning filter, and then, feeding the filtered water into ultrafiltration equipment for ultrafiltration to obtain ultrafiltration produced water and ultrafiltration concentrated water, feeding the ultrafiltration produced water into an ultrafiltration produced water tank, and feeding the ultrafiltration concentrated water into a waste liquid collecting tank;
s4, lifting the ultrafiltration product water by a reverse osmosis booster pump, and then filtering the ultrafiltration product water by a reverse osmosis cartridge filter;
s5, pressurizing the effluent of the reverse osmosis cartridge filter by a reverse osmosis high-pressure pump, and desalting the effluent by a reverse osmosis device to obtain reverse osmosis produced water and reverse osmosis concentrated water, wherein the reverse osmosis produced water enters a regulating water tank, and the reverse osmosis concentrated water enters a reverse osmosis concentrated water tank;
s6, lifting the reverse osmosis concentrated water in the reverse osmosis concentrated water tank to a reverse osmosis concentrated water cartridge filter by a reverse osmosis concentrated water booster pump, enabling the water discharged from the reverse osmosis concentrated water cartridge filter to enter a concentrated water reverse osmosis device for desalination after being boosted by a concentrated water high-pressure pump to obtain produced water and super concentrated water, enabling the produced water to enter a regulating water tank, and enabling the super concentrated water to enter a super concentrated water tank;
and S7, after being pressurized by a PFET booster pump, the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration, and the produced water enters a regulating water tank.
Preferably, in S1, the softening device is a mechanical accelerated clarifier provided with a sloped tube honeycomb settling structure, the sloped angle being 60 ° from horizontal; the single treatment capacity of the mechanical accelerated clarification tank is 250m3H; the sludge discharge period of the mechanical accelerated clarification tank is 6-12 h.
Preferably, the mechanical accelerated clarifier has a sludge discharge period of 8 h.
Preferably, in the process of softening raw water by using the mechanical accelerated clarifier, the used alkali is sodium carbonate and sodium hydroxide, the used acid is hydrochloric acid, the used coagulant is polyaluminium chloride, and the used flocculant is polyacrylamide with the molecular weight of 800-.
Preferably, the flocculating agent is used in a concentration of 0.2 to 0.3 wt.% during use.
Preferably, in S2, the full-automatic filter consists of 10 filter chambers, and when the filter material in the filter chamber is cut off to 2-2.5kg/m2When mud is discharged, the device performs automatic back flushing; wherein the back washing time is 3-5min, and the strength is 12-14L/s.m2(ii) a A reinforced ABS drainage cap is arranged on a porous filter plate at the bottom of the filter chamber of the full-automatic filter; the siphon of the fully automatic filter adopts an upward arrangement form.
Preferably, in S3, the ultrafiltration apparatus performs backwashing once every 30-60min, and performs sterilizing once every 4 times of backwashing by adding bactericide, and the backwashing water is drained into a waste liquid collecting tank; and chemically cleaning the membrane every 3-6 months to remove the dirt and blockage on the surface.
Preferably, the bactericide is sodium hypochlorite.
Preferably, in S3, a cross-flow filtration operation mode is adopted during the ultrafiltration membrane filtration operation in the ultrafiltration apparatus, and the water yield is greater than 90%; the capacity of the ultrafiltration apparatus was 220m3And h, the adopted membrane elements are of hollow fiber structures, the material is polyvinylidene fluoride, a vertical single-piece form is selected, each membrane element is provided with an independent valve, and the operation of other membrane elements is not influenced during disassembly.
Preferably, the membrane element has a membrane area of 75m2Flux of 50L/m2H, up to 3.75m360 pieces per piece.
Preferably, the membrane element is a membrane element SFP-2880 or a membrane element UFOA 225L.
Preferably, in S4, a pipeline mixer is disposed on the water inlet main pipe of the reverse osmosis cartridge filter, and a reducing agent and a scale inhibitor are added into the ultrafiltration product water to be fed into the reverse osmosis cartridge filter through the pipeline mixer; the flow velocity in the static pipeline mixer is 0.9-1.2 m/s; the residual chlorine of the outlet water of the reverse osmosis cartridge filter is less than 0.1 mg/L; in S6, a pipeline mixer is disposed on the water inlet main pipe of the cartridge filter for reverse osmosis concentrated water, and a reducing agent and a scale inhibitor are added into the ultrafiltration concentrated water to be fed into the cartridge filter for reverse osmosis concentrated water through the pipeline mixer.
Preferably, in S5, the reverse osmosis equipment adopts a first-stage and a second-stage, and the overall recovery rate is 75%; in S6, the concentrated water reverse osmosis equipment adopts a first-stage and a second-stage, and the recovery rate is 65%.
Preferably, in S5, the reverse osmosis device has a recovery rate of 75%, a system desalination rate of 98% or more, and a water yield of 165m3And h, selecting 222 reverse osmosis membrane components, placing the reverse osmosis membrane components in a 6-core glass fiber reinforced plastic membrane shell, wherein 37 reverse osmosis membrane components are arranged in a way that the total number is 24: 13; in S6, the recovery rate of the concentrated water reverse osmosis equipment is 65%, the desalination rate of the system is more than or equal to 98%, and the water yield is 40m3H; selecting 84 reverse osmosis membrane components, placing the components in a 6-core glass fiber reinforced plastic membrane shell, wherein 14 reverse osmosis membrane components are arranged in a way that the total number of the components is 9: 5.
preferably, in S5 and S6, the water inlet pipes of the reverse osmosis device and the concentrated water reverse osmosis device adopt side water inlet.
Preferably, in S6, the reverse osmosis concentrate in the reverse osmosis concentrate tank is softened by the mechanical accelerated clarifier and then lifted to the reverse osmosis concentrate cartridge filter by the concentrate booster pump.
Preferably, the overall system throughput is 6000m3D, 250m of raw water3H enters a membrane system, and the final effluent is 235m3The effluent quality meets TDS less than 750mg/L and sulfate less than 350 mg/L.
Preferably, in S1, the filtering is sand filter filtering.
Preferably, in S1, the raw water collected by the collecting tank is pressurized by a pressurizing pump and then enters the softening device for softening treatment.
Preferably, in S2, the softened water in the softened water producing pool enters the fully automatic filter after being pressurized by the booster pump.
Preferably, in S2, 4 filter chambers in the fully automatic filter are combined to share one flushing water tank; when one filter chamber is backwashed in each group, water produced by three filter chambers and water stored in a clean water tank help the filter chamber to be backwashed together, and a siphon breaking pipe automatically ends the backwashing process; the single unit treatment capacity of the full-automatic filter is 250m3H, adopting carbon steel for internal epoxy corrosion prevention;
preferably, in S3, the method further comprises cleaning the ultrafiltration apparatus with the ultrafiltration product water in the ultrafiltration product water tank.
Preferably, in S3, the ultrafiltration apparatus needs to be periodically washed with acid and alkali,
preferably, in S3, the ultrafiltration water-producing tank has a volume of 500m3。
Preferably, in S3, the self-cleaning filter has a filtering accuracy of 100 μm.
Preferably, in S5, the reverse osmosis concentrated water tank has a volume of 100m3。
Preferably, in S5 and S6, the high-pressure pump is controlled by frequency conversion, so as to effectively prolong the service life of the pump.
Preferably, in the reverse osmosis device, in S5, the high-pressure pipeline part is made of SS304 stainless steel, and the low-pressure pipeline part is made of a UPVC pipeline;
preferably, in S5, the outlet water of the reverse osmosis cartridge filter is adsorbed by cation resin, then is adsorbed by anion resin, and then enters the reverse osmosis device for desalination after being pressurized by the reverse osmosis high-pressure pump, so as to obtain reverse osmosis produced water and reverse osmosis concentrated water.
Preferably, in S6, before the reverse osmosis concentrated water in the reverse osmosis concentrated water tank is boosted by the reverse osmosis concentrated water booster pump, the method further comprises the step of subjecting the reverse osmosis concentrated water to photocatalytic oxidation reaction, wherein the photocatalytic oxidation reaction is carried out for 40-55min, the used light is ultraviolet light with the wavelength of 254nm, and the oxidant is H2O2The adding amount of concentrated water per liter is 2-5 mmol.
Preferably, the filter elements of the reverse osmosis cartridge filter in the S4 and the reverse osmosis concentrated water cartridge filter in the S6 are both polypropylene spray-melted superfine fiber filter elements, and the filter shell is made of glass fiber reinforced plastic.
Preferably, the collecting pit goes out water and adopts the carbon steel material to ultrafiltration apparatus inlet channel, ultrafiltration apparatus produces the water pipeline and adopts the UPVC material, reverse osmosis equipment and dense water reverse osmosis apparatus water inlet main pipe adopt the UPVC material, it adopts the UPVC material to produce the water pipe, the compressed air pipeline adopts the zinc-plated material, it adopts the UPVC material to wash, add accessory device pipelines such as medicine, reverse osmosis apparatus body high-pressure line adopts the SS304 material, the low-pressure line adopts the UPVC material, dense water reverse osmosis apparatus body high-pressure line adopts the SS316 material, the low-pressure line adopts the UPVC material, ultrafiltration apparatus body adopts the UPVC material.
Preferably, in S7, the PFET boost pump flow rate is 20m3The delivery lift is 25 meters, and the material of the flow passage component is 2205 duplex stainless steel.
Preferably, the PFET booster pump is a horizontal centrifugal pump of southern Hangzhou or Kjean spring of Shanghai.
Preferably, the material of the mechanical accelerated clarification tank is carbon steel inner epoxy anticorrosion.
Preferably, the reverse osmosis cartridge filter and the reverse osmosis concentrated water cartridge filter are both shell cartridge filters, the shell is made of glass fiber reinforced plastic, the filter elements are replaceable filter rods, the filtering precision is 5 micrometers, the length is 40 inches, and the filter elements are polypropylene spray-melted superfine fiber filter elements.
Preferably, the raw water is mixed with the treated produced water in the regulating reservoir and then discharged, wherein the salt content (TDS) is less than 1000mg/L, and the sulfate radical is less than 350 mg/L.
Preferably, the membrane components of the reverse osmosis equipment and the concentrated water reverse osmosis equipment are both in one-pole two-section mode, the concentrated water of the first-section equipment is used as the inlet water of the second-section equipment, the recovery rate of the whole set of equipment can be effectively improved on the premise that the produced water meets the specified requirements, and the waste of water resources is reduced.
According to the method for recycling the high-salinity wastewater reclaimed water, firstly, raw water collected by the collecting tank enters softening equipment for softening treatment, so that hardness, suspended particles and the like in the water are removed, softened produced water obtained after filtration sequentially passes through the full-automatic filter and the self-cleaning filter to filter impurities such as particles, colloid and the like in a system, the interception effect is good, and the cleaning is convenient; then, the water enters ultrafiltration equipment for ultrafiltration, so that suspended matters and colloids in the water are removed, high molecular substances (protein, nucleic acid, polysaccharide and the like) and impurities such as bacteria and organic matters in raw water are removed, the normal operation of reverse osmosis is ensured, a specific ultrafiltration membrane element is adopted, the service life is long, the water quality of produced water can be ensured for a long time, and the water has good separation capacity on the colloids, suspended particles, chromaticity, turbidity, bacteria and macromolecular organic matters; the ultrafiltration produced water is respectively lifted by a reverse osmosis booster pump and a reverse osmosis concentrated water booster pump and then respectively enters a reverse osmosis cartridge filter and a reverse osmosis concentrated water cartridge filter, particles larger than 5 mu m are intercepted and then respectively enter a reverse osmosis device and a concentrated water reverse osmosis device, soluble salt, colloid, organic matters and microorganisms in the water are removed, and the purpose of desalting the effluent is achieved; the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration after being pressurized by the PFET booster pump, the treatment process flow is short, the anti-scaling performance is good, and the operation cost is low; in the method for recycling the water in the high-salt-content wastewater, softening in a softening device is taken as pretreatment, an ultrafiltration system is taken as pretreatment, a reverse osmosis device is taken as a core desalting device, a PFET evaporation system is adopted for concentration, and the synergistic effects of softening, ultrafiltration, reverse osmosis and PFET evaporation concentration are combined, so that the method is safe, reliable, environment-friendly, efficient and energy-saving in operation, stable in water quality and good in quality of produced water, high in recovery rate of the system, long in service life of reverse osmosis and small in occupied space.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The invention provides a method for recycling reclaimed water in high-salt-content wastewater, which comprises the following steps:
s1, softening the raw water collected by the collecting tank in a softening device, filtering, and feeding the obtained softened water into a softened water producing pool;
s2, filtering the softened water in the softened water producing pool by a full-automatic filter and then feeding the softened water into a clean water pool;
s3, filtering the produced water in the clean water tank by a self-cleaning filter, and then, feeding the filtered water into ultrafiltration equipment for ultrafiltration to obtain ultrafiltration produced water and ultrafiltration concentrated water, feeding the ultrafiltration produced water into an ultrafiltration produced water tank, and feeding the ultrafiltration concentrated water into a waste liquid collecting tank;
s4, lifting the ultrafiltration product water by a reverse osmosis booster pump, and then filtering the ultrafiltration product water by a reverse osmosis cartridge filter;
s5, pressurizing the effluent of the reverse osmosis cartridge filter by a reverse osmosis high-pressure pump, and desalting the effluent by a reverse osmosis device to obtain reverse osmosis produced water and reverse osmosis concentrated water, wherein the reverse osmosis produced water enters a regulating water tank, and the reverse osmosis concentrated water enters a reverse osmosis concentrated water tank;
s6, lifting the reverse osmosis concentrated water in the reverse osmosis concentrated water tank to a reverse osmosis concentrated water cartridge filter by a reverse osmosis concentrated water booster pump, enabling the water discharged from the reverse osmosis concentrated water cartridge filter to enter a concentrated water reverse osmosis device for desalination after being boosted by a concentrated water high-pressure pump to obtain produced water and super concentrated water, enabling the produced water to enter a regulating water tank, and enabling the super concentrated water to enter a super concentrated water tank;
and S7, after being pressurized by a PFET booster pump, the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration, and the produced water enters a regulating water tank.
Example 2
The invention provides a method for recycling reclaimed water in high-salt-content wastewater, which comprises the following steps:
s1, softening the raw water collected by the collecting tank in a softening device, filtering, and feeding the obtained softened water into a softened water producing pool; the softening equipment is a mechanical accelerated clarification tank, an inclined-tube honeycomb settling structure is arranged in the mechanical accelerated clarification tank, and the inclination angle of the inclined-tube honeycomb settling structure is 60 degrees to the horizontal direction; the single treatment capacity of the mechanical accelerated clarification tank is 250m3H; the sludge discharge period of the mechanical accelerated clarification tank is 6 hours; in the process of softening raw water by using a mechanical accelerated clarification tank, the used alkali is sodium carbonate and sodium hydroxide, the used acid is hydrochloric acid, the used coagulant is polyaluminium chloride, and the used flocculating agent is polyacrylamide with the molecular weight of 800 ten thousand; in the using process, the using concentration of the flocculating agent is 0.3 wt%;
s2, filtering the softened water in the softened water producing pool by a full-automatic filter and then feeding the softened water into a clean water pool; wherein, the full-automatic filter consists of 10 filter chambers, and when the filtering material in the filter chambers cuts the sewage to 2kg/m2When mud is discharged, the device performs automatic back flushing; wherein the back washing time is 5min, and the strength is 12L/s.m2(ii) a A reinforced ABS drainage cap is arranged on a porous filter plate at the bottom of the filter chamber of the full-automatic filter; the siphon of the full-automatic filter adopts an upward arrangement mode;
s3, filtering the produced water in the clean water tank by a self-cleaning filter, and then, feeding the filtered water into ultrafiltration equipment for ultrafiltration to obtain ultrafiltration produced water and ultrafiltration concentrated water, feeding the ultrafiltration produced water into an ultrafiltration produced water tank, and feeding the ultrafiltration concentrated water into a waste liquid collecting tank; wherein, the ultrafiltration equipment performs backwashing once every 30min, sodium hypochlorite is added for sterilization once every 4 times of backwashing, and backwashing drainage water enters a waste liquid collecting tank; carrying out chemical cleaning on the membrane once every 6 months to remove dirt and blockage on the surface; the operation mode of cross flow filtration is adopted in the ultrafiltration membrane filtration operation process in the ultrafiltration equipment, and the water yield is more than 90 percent; the capacity of the ultrafiltration apparatus was 220m3The adopted membrane elements are of hollow fiber structures, the material is polyvinylidene fluoride, a vertical single-membrane form is selected, each membrane element is provided with an independent valve, and the operation of other membrane elements is not influenced during disassembly; the membrane element has a membrane area of 75m2Flux of 50L/m2H, up to 3.75m360 pieces per piece; the membrane element is a membrane element SFP-2880;
s4, lifting the ultrafiltration product water by a reverse osmosis booster pump, and then filtering the ultrafiltration product water by a reverse osmosis cartridge filter; the system comprises a reverse osmosis cartridge filter, a water inlet main pipe of the reverse osmosis cartridge filter, a water outlet main pipe of the reverse osmosis cartridge filter and a water outlet main pipe of the reverse osmosis cartridge filter, wherein a pipeline mixer is; the flow velocity in the pipe of the static pipeline mixer is 1.2 m/s; the residual chlorine of the outlet water of the reverse osmosis cartridge filter is less than 0.1 mg/L;
s5, pressurizing the effluent of the reverse osmosis cartridge filter by a reverse osmosis high-pressure pump, and desalting the effluent by a reverse osmosis device to obtain reverse osmosis produced water and reverse osmosis concentrated water, wherein the reverse osmosis produced water enters a regulating water tank, and the reverse osmosis concentrated water enters a reverse osmosis concentrated water tank;
s6, lifting the reverse osmosis concentrated water in the reverse osmosis concentrated water tank to a reverse osmosis concentrated water cartridge filter by a reverse osmosis concentrated water booster pump, enabling the water discharged from the reverse osmosis concentrated water cartridge filter to enter a concentrated water reverse osmosis device for desalination after being boosted by a concentrated water high-pressure pump to obtain produced water and super concentrated water, enabling the produced water to enter a regulating water tank, and enabling the super concentrated water to enter a super concentrated water tank; the system comprises a reverse osmosis concentrated water cartridge filter, a water inlet main pipe of the reverse osmosis concentrated water cartridge filter, a water outlet main pipe of the reverse osmosis concentrated water cartridge filter, a water inlet pipe of the reverse osmosis concentrated water cartridge filter, a water outlet pipe of the water outlet main pipe of the reverse osmosis concentrated water cartridge filter, a water inlet pipe of the;
s7, after being pressurized by a PFET booster pump, the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration, and the produced water enters a regulating water tank;
in S5, the reverse osmosis equipment adopts a first-stage and a second-stage, and the overall recovery rate is 75%; in S6, the concentrated water reverse osmosis equipment adopts a first-stage and a second-stage, and the recovery rate is 65%;
in S5, the system desalination rate of the reverse osmosis equipment is more than or equal to 98%, and the water yield is 165m3And h, selecting 222 reverse osmosis membrane components, placing the reverse osmosis membrane components in a 6-core glass fiber reinforced plastic membrane shell, wherein 37 reverse osmosis membrane components are arranged in a way that the total number is 24: 13; in S6, the system desalination rate of the concentrated water reverse osmosis equipment is more than or equal to 98%, and the water yield is 40m3H; 84 selected reverse osmosis membrane componentsAnd placing the glass fiber reinforced plastic composite material in a 6-core glass fiber reinforced plastic membrane shell, wherein 14 glass fiber reinforced plastic membrane shells are arranged in a mode of 9: 5;
in S5 and S6, the water inlet pipes of the reverse osmosis equipment and the concentrated water reverse osmosis equipment adopt side water inlet;
in S6, the reverse osmosis concentrated water in the reverse osmosis concentrated water tank is softened by the mechanical accelerated clarification tank and then is lifted to the reverse osmosis concentrated water cartridge filter by the concentrated water booster pump.
Example 3
The invention provides a method for recycling reclaimed water in high-salt-content wastewater, which comprises the following steps:
s1, softening the raw water collected by the collecting tank in a softening device, filtering, and feeding the obtained softened water into a softened water producing pool; the softening equipment is a mechanical accelerated clarification tank, an inclined-tube honeycomb settling structure is arranged in the mechanical accelerated clarification tank, and the inclination angle of the inclined-tube honeycomb settling structure is 60 degrees to the horizontal direction; the single treatment capacity of the mechanical accelerated clarification tank is 250m3H; the sludge discharge period of the mechanical accelerated clarification tank is 12 hours; in the process of softening raw water by using a mechanical accelerated clarification tank, the used alkali is sodium carbonate and sodium hydroxide, the used acid is hydrochloric acid, the used coagulant is polyaluminium chloride, and the used flocculating agent is polyacrylamide with the molecular weight of 1200 ten thousand; in the using process, the using concentration of the flocculating agent is 0.2 wt%;
s2, filtering the softened water in the softened water producing pool by a full-automatic filter and then feeding the softened water into a clean water pool; wherein, the full-automatic filter consists of 10 filter chambers, and when the filtering material in the filter chambers is cut off to 2.5kg/m2When the sludge is discharged, the device performs automatic back washing, wherein the back washing time is 3min, and the strength is 14L/s.m2(ii) a A reinforced ABS drainage cap is arranged on a porous filter plate at the bottom of the filter chamber of the full-automatic filter; the siphon of the full-automatic filter adopts an upward arrangement mode;
s3, filtering the produced water in the clean water tank by a self-cleaning filter, and then, feeding the filtered water into ultrafiltration equipment for ultrafiltration to obtain ultrafiltration produced water and ultrafiltration concentrated water, feeding the ultrafiltration produced water into an ultrafiltration produced water tank, and feeding the ultrafiltration concentrated water into a waste liquid collecting tank; wherein the ultrafiltration equipment is backwashed once every 60min, and the bactericide is added into the ultrafiltration equipment every 4 times of backwashingSterilizing once, and backwashing and draining water to enter a waste liquid collecting tank; carrying out chemical cleaning on the membrane once every 3 months to remove dirt and blockage on the surface; the bactericide is sodium hypochlorite; the operation mode of cross flow filtration is adopted in the ultrafiltration membrane filtration operation process in the ultrafiltration equipment, and the water yield is 92%; the capacity of the ultrafiltration apparatus was 220m3The adopted membrane elements are of hollow fiber structures, the material is polyvinylidene fluoride, a vertical single-membrane form is selected, each membrane element is provided with an independent valve, and the operation of other membrane elements is not influenced during disassembly; the membrane element has a membrane area of 75m2Flux of 50L/m2H, up to 3.75m360 pieces per piece; the membrane element is a membrane element UFOA 225L;
s4, lifting the ultrafiltration product water by a reverse osmosis booster pump, and then filtering the ultrafiltration product water by a reverse osmosis cartridge filter; the system comprises a reverse osmosis cartridge filter, a water inlet main pipe of the reverse osmosis cartridge filter, a water outlet main pipe of the reverse osmosis cartridge filter and a water outlet main pipe of the reverse osmosis cartridge filter, wherein a pipeline mixer is; the flow velocity in the pipe of the static pipeline mixer is 0.9 m/s; the residual chlorine of the outlet water of the reverse osmosis cartridge filter is 0.05 mg/L;
s5, pressurizing the effluent of the reverse osmosis cartridge filter by a reverse osmosis high-pressure pump, and desalting the effluent by a reverse osmosis device to obtain reverse osmosis produced water and reverse osmosis concentrated water, wherein the reverse osmosis produced water enters a regulating water tank, and the reverse osmosis concentrated water enters a reverse osmosis concentrated water tank;
s6, softening reverse osmosis concentrated water in a reverse osmosis concentrated water tank through a mechanical accelerated clarification tank, then lifting the softened reverse osmosis concentrated water to a reverse osmosis concentrated water cartridge filter through a reverse osmosis concentrated water booster pump, enabling outlet water of the reverse osmosis concentrated water cartridge filter to enter a concentrated water reverse osmosis device for desalination after being boosted by a concentrated water high-pressure pump to obtain produced water and super concentrated water, enabling the produced water to enter a regulating water tank, and enabling the super concentrated water to enter a super concentrated water tank;
s7, after being pressurized by a PFET booster pump, the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration, and the produced water enters a regulating water tank;
in S5, the reverse osmosis equipment adopts a first-stage and a second-stage, and the overall recovery rate is 75%; in S6, the concentrated water reverse osmosis equipment adopts a first-stage and a second-stage, and the recovery rate is 65%;
in S5, the reverse osmosis plant has a system rejection of 98% and a water production of 165m3And h, selecting 222 reverse osmosis membrane components, placing the reverse osmosis membrane components in a 6-core glass fiber reinforced plastic membrane shell, wherein 37 reverse osmosis membrane components are arranged in a way that the total number is 24: 13; in S6, the system rejection rate of the concentrated water reverse osmosis device is 98%, and the water yield is 40m3H; selecting 84 reverse osmosis membrane components, placing the components in a 6-core glass fiber reinforced plastic membrane shell, wherein 14 reverse osmosis membrane components are arranged in a way that the total number of the components is 9: 5;
in S5 and S6, the water inlet pipes of the reverse osmosis device and the concentrated water reverse osmosis device adopt side water inlet.
Example 4
The invention provides a method for recycling reclaimed water in high-salt-content wastewater, which comprises the following steps:
s1, softening the raw water collected by the collecting tank in a softening device, filtering, and feeding the obtained softened water into a softened water producing pool;
s2, filtering the softened water in the softened water producing pool by a full-automatic filter and then feeding the softened water into a clean water pool;
s3, filtering the produced water in the clean water tank by a self-cleaning filter, and then, feeding the filtered water into ultrafiltration equipment for ultrafiltration to obtain ultrafiltration produced water and ultrafiltration concentrated water, feeding the ultrafiltration produced water into an ultrafiltration produced water tank, and feeding the ultrafiltration concentrated water into a waste liquid collecting tank;
s4, lifting the ultrafiltration product water by a reverse osmosis booster pump, and then filtering the ultrafiltration product water by a reverse osmosis cartridge filter;
s5, pressurizing the effluent of the reverse osmosis cartridge filter by a reverse osmosis high-pressure pump, and desalting the effluent by a reverse osmosis device to obtain reverse osmosis produced water and reverse osmosis concentrated water, wherein the reverse osmosis produced water enters a regulating water tank, and the reverse osmosis concentrated water enters a reverse osmosis concentrated water tank;
s6, lifting the reverse osmosis concentrated water in the reverse osmosis concentrated water tank to a reverse osmosis concentrated water cartridge filter by a reverse osmosis concentrated water booster pump, enabling the water discharged from the reverse osmosis concentrated water cartridge filter to enter a concentrated water reverse osmosis device for desalination after being boosted by a concentrated water high-pressure pump to obtain produced water and super concentrated water, enabling the produced water to enter a regulating water tank, and enabling the super concentrated water to enter a super concentrated water tank;
s7, after being pressurized by a PFET booster pump, the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration, and the produced water enters a regulating water tank;
in S1, the softening device is a mechanical accelerated clarification tank, an inclined-tube honeycomb settling structure is arranged in the mechanical accelerated clarification tank, and the inclination angle of the inclined-tube honeycomb settling structure is 60 degrees to the horizontal direction; the single treatment capacity of the mechanical accelerated clarification tank is 250m3H; the sludge discharge period of the mechanical accelerated clarification tank is 8 hours;
in the process of softening raw water by using a mechanical accelerated clarification tank, the used alkali is sodium carbonate and sodium hydroxide, the used acid is hydrochloric acid, the used coagulant is polyaluminium chloride, and the used flocculating agent is polyacrylamide with the molecular weight of 1000 ten thousand; in the using process, the using concentration of the flocculating agent is 0.25 wt%;
in S2, the full-automatic filter consists of 10 filter chambers, and when the filtering material in the filter chambers is cut off to 2.2kg/m2When mud is discharged, the device performs automatic back flushing; wherein the back washing time is 4min, and the strength is 13L/s.m2(ii) a A reinforced ABS drainage cap is arranged on a porous filter plate at the bottom of the filter chamber of the full-automatic filter; the siphon of the full-automatic filter adopts an upward arrangement mode;
in S3, the ultrafiltration equipment performs backwashing once every 45min, the bactericide is added and sterilized once every 4 times of backwashing, and backwashing drainage water enters a waste liquid collecting tank; carrying out chemical cleaning on the membrane once every 4 months to remove dirt and blockage on the surface;
the bactericide is sodium hypochlorite;
in S3, a cross-flow filtration operation mode is adopted in the ultrafiltration membrane filtration operation process in the ultrafiltration equipment, and the water yield is 93%; the capacity of the ultrafiltration apparatus was 220m3The adopted membrane elements are of hollow fiber structures, the material is polyvinylidene fluoride, a vertical single-membrane form is selected, each membrane element is provided with an independent valve, and the operation of other membrane elements is not influenced during disassembly;
the membrane element has a membrane area of 75m2Flux of 50L/m2H, up to 3.75m360 pieces per piece;
the membrane element is a membrane element SFP-2880;
in S4, a pipeline mixer is arranged on the water inlet main pipe of the reverse osmosis cartridge filter, and a reducing agent and a scale inhibitor are added into the ultrafiltration product water entering the reverse osmosis cartridge filter through the pipeline mixer; the flow velocity in the pipe of the static pipeline mixer is 1 m/s; the residual chlorine of the outlet water of the reverse osmosis cartridge filter is 0.08 mg/L;
in S5, the reverse osmosis equipment adopts a first-stage and a second-stage, and the overall recovery rate is 75%; in S6, the concentrated water reverse osmosis equipment adopts a first-stage and a second-stage, and the recovery rate is 65%;
at S5, the reverse osmosis plant has a system rejection of 99% and a water production of 165m3And h, selecting 222 reverse osmosis membrane components, placing the reverse osmosis membrane components in a 6-core glass fiber reinforced plastic membrane shell, wherein 37 reverse osmosis membrane components are arranged in a way that the total number is 24: 13; in S6, the recovery rate of the concentrated water reverse osmosis device is 65%, the desalination rate of the system is 98%, and the water yield is 40m3H; selecting 84 reverse osmosis membrane components, placing the components in a 6-core glass fiber reinforced plastic membrane shell, wherein 14 reverse osmosis membrane components are arranged in a way that the total number of the components is 9: 5;
in S5 and S6, the water inlet pipes of the reverse osmosis equipment and the concentrated water reverse osmosis equipment adopt side water inlet;
in S6, the reverse osmosis concentrated water in the reverse osmosis concentrated water tank is softened by the mechanical accelerated clarification tank and then is lifted to a reverse osmosis concentrated water cartridge filter by a concentrated water booster pump;
in the invention, the whole system treatment capacity is 6000m3D, 250m of raw water3H enters a membrane system, and the final effluent is 235m3The effluent quality meets TDS less than 750mg/L and sulfate less than 350 mg/L.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A method for recycling reclaimed water from high-salt-content wastewater is characterized by comprising the following steps:
s1, softening the raw water collected by the collecting tank in a softening device, filtering, and feeding the obtained softened water into a softened water producing pool;
s2, filtering the softened water in the softened water producing pool by a full-automatic filter and then feeding the softened water into a clean water pool;
s3, filtering the produced water in the clean water tank by a self-cleaning filter, and then, feeding the filtered water into ultrafiltration equipment for ultrafiltration to obtain ultrafiltration produced water and ultrafiltration concentrated water, feeding the ultrafiltration produced water into an ultrafiltration produced water tank, and feeding the ultrafiltration concentrated water into a waste liquid collecting tank;
s4, lifting the ultrafiltration product water by a reverse osmosis booster pump, and then filtering the ultrafiltration product water by a reverse osmosis cartridge filter;
s5, pressurizing the effluent of the reverse osmosis cartridge filter by a reverse osmosis high-pressure pump, and desalting the effluent by a reverse osmosis device to obtain reverse osmosis produced water and reverse osmosis concentrated water, wherein the reverse osmosis produced water enters a regulating water tank, and the reverse osmosis concentrated water enters a reverse osmosis concentrated water tank;
s6, lifting the reverse osmosis concentrated water in the reverse osmosis concentrated water tank to a reverse osmosis concentrated water cartridge filter by a reverse osmosis concentrated water booster pump, enabling the water discharged from the reverse osmosis concentrated water cartridge filter to enter a concentrated water reverse osmosis device for desalination after being boosted by a concentrated water high-pressure pump to obtain produced water and super concentrated water, enabling the produced water to enter a regulating water tank, and enabling the super concentrated water to enter a super concentrated water tank;
and S7, after being pressurized by a PFET booster pump, the super-concentrated water in the super-concentrated water tank enters PFET evaporation concentration equipment for concentration, and the produced water enters a regulating water tank.
2. The method for recycling the reclaimed water from the high-salinity wastewater according to claim 1, wherein in S1, the softening equipment is a mechanical accelerated clarification tank, an inclined-tube honeycomb settling structure is arranged in the mechanical accelerated clarification tank, and the inclined angle is 60 degrees to the horizontal direction; the single treatment capacity of the mechanical accelerated clarification tank is 250m3H; the sludge discharge period of the mechanical accelerated clarification tank is 6-12 h; preferably, the mechanical accelerated clarifier has a sludge discharge period of 8 h.
3. The method for recycling the reclaimed water in the high-salinity wastewater as claimed in claim 2, wherein in the process of softening the raw water by using the mechanical accelerated clarifier, the used alkali is sodium carbonate and sodium hydroxide, the used acid is hydrochloric acid, the used coagulant is polyaluminium chloride, and the used flocculant is polyacrylamide with the molecular weight of 800-; preferably, the flocculating agent is used in a concentration of 0.2 to 0.3 wt.% during use.
4. The method for recycling the water in the wastewater with high salt content as claimed in claim 1, wherein in S2, the fully automatic filter comprises 10 filter chambers, and when the filter material in the filter chamber is cut to 2-2.5kg/m2When mud is discharged, the device performs automatic back flushing; wherein the back washing time is 3-5min, and the strength is 12-14L/s.m2(ii) a A reinforced ABS drainage cap is arranged on a porous filter plate at the bottom of the filter chamber of the full-automatic filter; the siphon of the fully automatic filter adopts an upward arrangement form.
5. The method for recycling reclaimed water from high-salinity wastewater according to claim 1, wherein in S3, the ultrafiltration equipment is backwashed once every 30-60min of operation, the bactericide is added and sterilized once every 4 times of backwashing, and the backwashing water is drained into a waste liquid collecting tank; carrying out chemical cleaning on the membrane once every 3-6 months to remove the dirt and blockage on the surface; preferably, the bactericide is sodium hypochlorite.
6. The method for recycling reclaimed water from high-salinity wastewater according to claim 1, wherein in S3, a cross-flow filtration operation mode is adopted in the ultrafiltration membrane filtration operation process in the ultrafiltration equipment, and the water yield is greater than 90%; the capacity of the ultrafiltration apparatus was 220m3The adopted membrane elements are of hollow fiber structures, the material is polyvinylidene fluoride, a vertical single-membrane form is selected, each membrane element is provided with an independent valve, and the operation of other membrane elements is not influenced during disassembly; preferably, the membrane element has a membrane area of 75m2Flux of 50L/m2H, up to 3.75m360 pieces per piece; preferably, the membrane element is a membrane element SFP-2880 or a membrane element UFOA 225L.
7. The method for recycling reclaimed water from high-salinity wastewater according to claim 1, wherein in S4, the water inlet header pipe of the reverse osmosis cartridge filter is provided with a pipeline mixer, and a reducing agent and a scale inhibitor are added into the ultrafiltration product water to be fed into the reverse osmosis cartridge filter through the pipeline mixer; the flow velocity in the static pipeline mixer is 0.9-1.2 m/s; the residual chlorine of the outlet water of the reverse osmosis cartridge filter is less than 0.1 mg/L; in S6, a pipeline mixer is disposed on the water inlet main pipe of the cartridge filter for reverse osmosis concentrated water, and a reducing agent and a scale inhibitor are added into the ultrafiltration concentrated water to be fed into the cartridge filter for reverse osmosis concentrated water through the pipeline mixer.
8. The method for recycling the reclaimed water from the high-salinity wastewater according to claim 1, wherein in S5, the reverse osmosis equipment adopts a first stage and a second stage, and the overall recovery rate is 75%; in S6, the concentrated water reverse osmosis equipment adopts a first-stage and a second-stage, and the recovery rate is 65%; preferably, in S5, the reverse osmosis device has a recovery rate of 75%, a system desalination rate of 98% or more, and a water yield of 165m3And h, selecting 222 reverse osmosis membrane components, placing the reverse osmosis membrane components in a 6-core glass fiber reinforced plastic membrane shell, wherein 37 reverse osmosis membrane components are arranged in a way that the total number is 24: 13; in S6, the recovery rate of the concentrated water reverse osmosis equipment is 65%, the desalination rate of the system is more than or equal to 98%, and the water yield is 40m3H; selecting 84 reverse osmosis membrane components, placing the components in a 6-core glass fiber reinforced plastic membrane shell, wherein 14 reverse osmosis membrane components are arranged in a way that the total number of the components is 9: 5; preferably, in S5 and S6, the water inlet pipes of the reverse osmosis device and the concentrated water reverse osmosis device adopt side water inlet.
9. The method for recycling water in high-salinity wastewater according to claim 1, wherein in S6, the reverse osmosis concentrated water in the reverse osmosis concentrated water tank is softened by the mechanical accelerated clarification tank and then lifted to the reverse osmosis concentrated water cartridge filter by the concentrated water booster pump.
10. The method for recycling the reclaimed water from the high-salinity wastewater according to any one of claims 1 to 9, wherein the treatment capacity of the whole system is 6000m3D, 250m of raw water3H entering the membrane system and finallyOutlet water 235m3The effluent quality meets TDS less than 750mg/L and sulfate less than 350 mg/L.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113651479A (en) * | 2021-08-16 | 2021-11-16 | 鲁西化工集团股份有限公司动力分公司 | System and process for producing desalted water with high utilization rate of raw water |
| CN114380444A (en) * | 2021-12-29 | 2022-04-22 | 江苏方洋水务有限公司 | High-salinity wastewater desalination treatment system and method |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113651479A (en) * | 2021-08-16 | 2021-11-16 | 鲁西化工集团股份有限公司动力分公司 | System and process for producing desalted water with high utilization rate of raw water |
| CN114380444A (en) * | 2021-12-29 | 2022-04-22 | 江苏方洋水务有限公司 | High-salinity wastewater desalination treatment system and method |
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