CN109455849A - Bi-membrane method recycled water advanced treatment based on control membrane fouling improves technique and device - Google Patents
Bi-membrane method recycled water advanced treatment based on control membrane fouling improves technique and device Download PDFInfo
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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
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- 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
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- 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
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- 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
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- 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
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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
- 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
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
Bi-membrane method recycled water advanced treatment based on control membrane fouling improves technique and device, which includes " lime coagulation-sand filtration " pretreatment, ozone and activated carbon, is based on CO2PH adjusting, " filtration-reverse osmosis " bi-membrane method, concentrate recirculation and advanced treatment unit.Organic pollutant and microorganism of the present invention using water in the removal of ozone and activated carbon technique, control the organic matter and microbial contamination of membrane process, ensure the effective use of active carbon；Using CO2PH value is adjusted, the fouling potentiality of inorganic salts is reduced, controls inorganic pollution；The reverse osmosis concentrated water of partial reflux, and concentrated water is handled using ozone, the organic pollutant in concentrated water is removed, the water rate of recovery is improved.The improvement technique cuts down organic matter and CO on conventional bi-membrane method recycled water advanced treatment Process ba- sis, through ozone2PH value is adjusted, effective control of fouling membrane is realized, had not only ensured the long-acting stable operation of bi-membrane method recycled water advanced treatment technique, but also the water rate of recovery can be improved.
Description
Technical field
The invention belongs to recycled water advanced treatment technical fields, and in particular to water depth in the bi-membrane method based on control membrane fouling
Processing improves technique and device.
Background technique
Global water resources shortage, water pollution and Ecology further deteriorate, but water consumption and water supply standard further mention
It rises, recycled water has become internationally recognized " city second water source ".The developed countries and regions such as Japan, Singapore, the U.S., European Union
Carry out regeneration wate research and application has had more than semicentennial history, and China's Treated sewage reusing is started late.Middle water in recent years
Reuse is increasingly paid attention to, and according to living to build portion's statistical communique in 2016, domestic city wastewater treatment rate is up to 93.44% at present, then
Unboiled water ascending ability and utilization are respectively up to 2.762 × 107m3/ d and 4.53 × 109 m3, it is left that reuse rate of recycled water reaches 10%
It is right." water prevention and cure of pollution action plan " (ten, the water) promulgated in 2015 is to urban wastewater treatment rate, water total amount control, emphasis
Industry waste water treatment and industry water intaking index have carried out stringent limitation, actively push forward reclaimed wastewater reuse.Therefore, with China's sewage
Continuous improvement and industry water intaking that handling rate and wastewater treatment and reuse the require limitation of water, recycled water will become one following
Important industrial water water source.
The pollutants such as certain suspended matter, nutritive salt, metal ion, organic matter and microorganism are still had in recycled water,
Reuse process will cause the problem of corrosion and scaling and microbial growth.Therefore Treated sewage reusing must carry out advanced treating to remove
The problems such as pollutant in middle water, mitigation corrosion and scaling and microbial growth, core process includes anti-corrosion, scale inhibition, organic matter
Removal, desalination and sterilization etc..Recycled water advanced treatment is the most fundamental means for slowing down corrosion and scaling and microbial growth problem, by
The complexity of Yu Zhongshui water quality and the stringency of water supply standard generally require combination different process with safeguards system and stablize fortune
Row.Process flow is usually " pretreatment-main process (- advanced treating) ", in combination with scale inhibition and process for sterilizing to ensure
The stability of system and the water quality for producing water.Recycled water advanced treatment main process experienced from filtering precipitating, lime coagulation to double films
The differentiation of technique, the subject depth treatment process that steam power plant's Treated sewage reusing uses at present include lime coagulation, UF membrane, aeration life
Object filter tank (BAF) etc..As the development of water treatment technology and water supply standard especially propose desalination and organic matter removal requirement
Height, other novel process include, advanced oxidation, membrane bioreactor (MBR), electrodialysis (ED), ion exchange, Microbial fuel
Battery, Electro Sorb, electrodeionization desalination (EDI) etc. are also ground in the pretreatment or advanced treating of steam power plant's Treated sewage reusing
Study carefully and applies.In addition, with steam power plant's internal water reuse and the requirement of zero-emission, the advanced desalination of concentrated water during Treated sewage reusing
Also increased with improving the demand of reusing rate, the technologies such as thermal method desalting technology, membrane distillation (MD), ED are also gradually applied to thermoelectricity
Factory's Treated sewage reusing advanced treatment system.
In general, although the situation for continuing to develop that a hundred flowers blossom is presented in treatment process, at present for engineer application
Bi-membrane method based on " micro-filtration/ultrafiltration-is reverse osmosis " is most widely used technique.It is with good separating effect, the rate of departure
Fastly, the advantages such as operational administrative is simple.But the objects such as trace suspension object, organic matter, zwitterion, silicon class, microorganism that middle water contains
Matter will lead to film and organic and inorganic, microorganism pollution occurs, cause significant dirty stifled phenomenon.RO film is dense non-porous film, operation
Pressure is high, and pollutant enrichment factor is high, and it is stifled to be easier to occur film dirt, leads to backwash frequently, reduces the service efficiency of film, or even occur
The risk of film breakage is the limiting factor of Treated sewage reusing.
RO has stringent limitation to water inlet, and SDI is generally required to be lower than 1NTU etc. lower than 0.1mg/L, turbidity less than 5, chlorine residue.
In order to solve membrane pollution problem, generally require the pretreatment carried out for reverse osmosis process, mainly reduce in water suspended matter,
Colloid, organic matter, microorganism isoconcentration inhibit and control the deposition of slightly soluble salt, metal oxide and silicon, prevent serious
Film dirt is stifled.Pretreating process mainly includes coagulating sedimentation, film filtering, MBR, absorption, advanced oxidation etc. at present.In general, mesh
The bi-membrane method recycled water advanced treatment process route of preceding most mainstream is " (lime) coagulation-active carbon-filtration-reverse osmosis ".Pass through stone
Grey coagulation process carries out the removal of hardness substance, suspended matter and partial organic substances；The reduction that organic matter is carried out by active carbon, into
And realize the control of fouling membrane.The technique has following defects that the limited sorption capacity of 1) active carbon, therefore regenerating active carbon
It is short with the period of replacement, it causes the complexity of operation and maintenance and there are the risks that pollutant penetrates；2) RO film is dense non-porous
Film, operating pressure are high, and pollutant enrichment factor is high, and it is stifled to be easier to occur film dirt, and backwash is caused frequently to reduce the service efficiency of film,
Even there is the risk of film breakage, is the limiting factor of Treated sewage reusing；In order to reduce the risk of fouling membrane, the technique concentration rate
It can not further be promoted, concentrated water amount is big, causes reusing rate lower；3) the raw water pH higher after lime coagulation, process are reverse osmosis
Easily occurs inorganic scaling after concentration.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends realizing organic and inorganic and micro- life on the basis of conventional double membrane process
The control of object pollution, specifically, by using ozone and activated carbon technique, utilizing CO2Adjust pH, concentrated water ozone oxidation and reflux
Equal strategies, to realize following goal of the invention:
(1) the regenerating active carbon period is improved；
(2) pollution for reducing film, extends the Membrane cleaning period；
(3) Treated sewage reusing rate is improved；
(4) inorganic salts fouling is reduced, inorganic fouling membrane is slowed down.
In order to solve the above technical problems, the present invention is achieved through the following technical solutions:
Bi-membrane method recycled water advanced treatment based on control membrane fouling improves technique, including pretreatment, ozone and activated carbon processing, ultrafiltration
Processing, CO2Adjust pH value, reverse osmosis, reverse osmosis concentrated water partial reflux；The reverse osmosis concentrated water partial reflux, reverse osmosis concentrated water
It flows back after using ozone oxidation part.
The ozone and activated carbon processing, ozone dosage 2-5mg/L；The CO2Processing, using CO2Carry out pH adjusting
Afterwards, feed water by reverse osmosis pH controls 5.6-7.0.
The reflux ratio of the reverse osmosis concentrated water partial reflux, reverse osmosis concentrated water is 1:4~1:1, using ozone Oxidation Treatment
Afterwards, it is mixed with raw water, the reverse osmosis concentrated water concentrated water of reflux and the mixed proportion of raw water are 1:5~1:2；At the ozone oxidation
Reason, the dosage of ozone are 2-5mg/L.
The pretreatment, using lime coagulation and sand filtration carry out in water pretreatment, comprising flocculant/flocculation aid and lime
It adds, coagulation whipping process, precipitating or clarifying process, sand filtration process.
Coagulation and sand filtration process concrete operations parameter the water water quality in is adjusted, and the flocculant of selection is poly-
Body substance；The solid-liquid separation tank of selection be sedimentation basin, inclined-plate clarifying basin, mechanical accelerating purifying pool, become hole filtering pool in one
Kind.
The flocculant is aluminium chloride, iron chloride, aluminium polychloride, polyaluminium sulfate, poly-ferric chloride, aluminium polychloride
One of iron, chitosan；The flocculation aid is polyacrylamide.
The pretreatment, Lime-Injecting amount are 300-600mg/L, and the dosage of flocculant is 200-300 mg/L.
The active carbon is one of industrial activited carbon, charcoal, modified activated carbon, composite activated carbon；
The ultrafiltration, the ultrafiltration membrane used for hollow-fibre membrane, plate membrane or rolled film, membrane material be cellulose acetate, polysulfones,
Polyether sulfone, Kynoar or polytetrafluoroethylene (PTFE)；
It is described it is reverse osmosis be low pressure reverse osmosis membrane process, membrane module is rolled membrane module.
Described device includes coagulating basin, precipitating/clarifying basin, sand filter, activated carbon filter, ultrafiltration apparatus, CO2Add dress
It sets, cartridge filter, reverse osmosis unit, ozone occur and throwing device, coagulant drug-adding device, lime chemicals dosing plant, spoil disposal
Device；The coagulating basin, precipitating/clarifying basin, sand filter, activated carbon filter, ultrafiltration apparatus, cartridge filter, reverse osmosis unit
It is sequentially connected, the reverse osmosis unit includes first outlet and second outlet；The first outlet exports pure water, and second outlet is defeated
Concentrated water is permeated out；The second outlet is connect by reverse osmosis concentrated water conveyance conduit with coagulating basin, for reverse osmosis concentrated water is defeated
It is sent to coagulating basin, is further mixed with raw water；
The ozone occurs and throwing device, connect with activated carbon filter entrance and reverse osmosis concentrated water conveyance conduit；The ozone
Occur and the ozone of throwing device generation is added to activated carbon filter and reverse osmosis concentrated water conveyance conduit respectively；
The CO2The outlet of throwing device is connect with middle water conveyance conduit, and tie point is between ultrafiltration pond and reverse osmosis pond；
The coagulant drug-adding device and lime chemicals dosing plant are connect with coagulating basin；The mud discharging device connects precipitating/clarifying basin.
Compared with prior art, the present invention obtains following technical effect:
(1) present invention considers the limited sorption capacity of active carbon, is applied to activated carbon filter reality for ozone as oxidant
The oxidation of existing organic matter, activity recovery charcoal absorption property, thus the regenerating active carbon period is improved, the regeneration period can be by original 1
It is promoted in week 4-6 weeks；The treatment effect of organic matter is improved simultaneously, reduces the risk that organic pollutant penetrates, and slows down organic film dirt
Dye；In addition, ozone can be used as fungicide, the control of microorganism may be implemented, control microbial contamination to a certain extent.
(2) present invention can significantly realize organic and inorganic pollution control, ensure the stable operation of membrane process, extend
In the Membrane cleaning period, in summer organic peak period with microbial contamination outburst, the cleaning frequency of film extended to 1.5-2 by 1 month
A month, significantly realize the control of fouling membrane.
(3) present invention effectively the generation of decelerating membrane pollution, raising Treated sewage reusing rate can reduce operation capital cost up to 80%
With about 40% etc..
The present invention removes reverse osmosis concentrated water partial reflux by the part that ozone carries out concentrated water organic matter, then with original
Water mixing is handled, and Treated sewage reusing rate can be significantly improved, and reduces the investment operating cost of whole recycled water advanced treatment process.
(4) present invention uses CO2PH is adjusted, the potentiality of inorganic salts fouling is reduced, slows down inorganic fouling membrane；Meanwhile CO2It is
Utilization and the carbon emission reduction of exhaust gas may be implemented in the primary discharge gas of industrial trade.
(5) present invention uses low pressure reverse osmosis process, operation energy consumption can be reduced under conditions of ensureing reuse water quality, subtracted
Slow fouling membrane.
Detailed description of the invention
Fig. 1: the recycled water advanced treatment technique and device flow chart that the present invention uses
In figure: 1- coagulating basin, 2- precipitating/clarifying basin, 3- sand filter, 4- activated carbon filter, 5- ultrafiltration apparatus, the reverse osmosis dress of 6-
It sets, 7- coagulant drug-adding device, 8- lime chemicals dosing plant, 9- mud discharging device, 10- ozone occur and throwing device, 11-CO2It throws
Feeder apparatus.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this hair
It is bright to be described in further detail.
Embodiment 1 improves technique based on the bi-membrane method recycled water advanced treatment of control membrane fouling
The middle water raw water quality index of the present embodiment is as follows: pH 7.68, conductance be 1804 μ S/cm, coloration 60, COD 42
Mg/L, TOC are 12.46 mg/L, ammonia-nitrogen content is 0.4 mg/L, total nitrogen content is 12.76 mg/L, total phosphorus content is
0.06mg/L。
Specific step is as follows for the recycled water advanced treatment process:
(1) it pre-processes
It is pre-processed using lime coagulation and sand filtration, Lime-Injecting amount is 500mg/L, and flocculant is aluminium polychloride, polymerization
One of aggressiveness substance such as aluminum sulfate, poly-ferric chloride, polyaluminum ferric chloride, dosage are 250 mg/L, and flocculation aid is
Polyacrylamide (PAM), dosage 2.5mg/L；
The polyacrylamide, No. CAS is 9003-05-8, and molecular formula is (C3H5NO) n；
The pH of water is 8.07 after pretreatment, conductance is 1787 μ S/cm, coloration 40, COD are 35 mg/L, TOC 11.5
Mg/L, ammonia-nitrogen content are 0.381 mg/L, total nitrogen content is 12.422 mg/L, total phosphorus content 0.01mg/L.
(2) ozone and activated carbon is handled
Oxidation processes are carried out using ozone and activated carbon and organic matter adsorbs, ozone dosage 3mg/L, the pH of water is after processing
8.02, conductance be 1789 μ S/cm, coloration 10, COD be 21 mg/L, TOC be 8.24 mg/L, ammonia-nitrogen content is 0.362 mg/
L, total nitrogen content is 10.601 mg/L, total phosphorus content is 0.02 mg/L.
(3) ultrafiltration
Be further processed using ultrafiltration, ultrafiltration use hollow fiber film assembly, after hyperfiltration treatment the pH of water be 7.92,
Conductance is 1787 μ S/cm, coloration 10, COD be 23 mg/L, TOC be 7.96 mg/L, ammonia-nitrogen content is 0.311 mg/L, total
Nitrogen content is 10.533 mg/L, total phosphorus content is 0.01 mg/L.
(4) CO2Adjust pH
Using CO2PH adjusting is carried out, feed water by reverse osmosis pH controls 6.8-7.5.
(5) security personnel's filtering
Cartridge filter is reverse osmosis preceding protective device, and security personnel's filter core that the present embodiment is selected is 0.5 μm.
(6) reverse osmosis
It is reverse osmosis using the reverse osmosis of two-part, all using the membrane module of rolling, the mixing of reverse osmosis process is discharged
PH is 6.55, conductance is 51.9 μ S/cm, coloration 0, COD≤1ppm, TOC be≤1ppm, ammonia-nitrogen content be≤1ppm, total nitrogen
Content is 0.817 mg/L, total phosphorus content is 0.003 mg/L；
Reverse osmosis concentrated water pH is 8.10, conductance is 6530 μ S/cm, coloration 90, COD be 93 mg/L, TOC be 26.2 mg/L,
Ammonia-nitrogen content is 6.8 mg/L, total nitrogen content is 50.033 mg/L, total phosphorus content is 0.83 mg/L.
(7) reflux of reverse osmosis concentrated water
By reverse osmosis concentrated water partial reflux, reflux ratio is 1:3~1:2, is removed by the part that ozone carries out concentrated water organic matter, smelly
Oxygen dosage is 3mg/L, then mixes and is handled with raw water, and the concentrated water of reflux and the mixed proportion of raw water are 1:4~1:3,
Treated sewage reusing rate can be significantly improved, Treated sewage reusing rate can be promoted to 80% by the 60% of the prior art, reduce the depth of water in entirety
Spend the investment operating cost for the treatment of process.
Using above-mentioned operation reserve, it can significantly realize organic and inorganic pollution control, ensure the stabilization of membrane process
Operation extends the Membrane cleaning period.Compared with not optimized control group, in summer organic peak period with microbial contamination outburst
The cleaning frequency of film was increased to 1.5-2 months by 1 month, significantly realized the control of fouling membrane.
Embodiment 2 improves device based on the bi-membrane method recycled water advanced treatment of control membrane fouling
Described device includes coagulating basin 1, precipitating/clarifying basin 2, sand filter 3, activated carbon filter 4, ultrafiltration apparatus 5, CO2Add dress
Set 11, reverse osmosis unit 6, ozone generation and throwing device 10, coagulant drug-adding device 7, lime chemicals dosing plant 8, mud discharging device
9；The coagulating basin 1, precipitating/clarifying basin 2, sand filter 3, activated carbon filter 4, ultrafiltration apparatus 5, cartridge filter, reverse osmosis dress
It sets 6 to be sequentially connected, the reverse osmosis unit 6 includes first outlet and second outlet；The first outlet exports pure water, and second goes out
Mouth output infiltration concentrated water；The second outlet is connect by reverse osmosis concentrated water conveyance conduit with coagulating basin 1, and being used for will be reverse osmosis concentrated
Water is transported to coagulating basin 1, further mixes with raw water；
The ozone occurs and throwing device 10, connect with 4 entrance of activated carbon filter and reverse osmosis concentrated water conveyance conduit；It is described smelly
The ozone that oxygen occurs and throwing device 10 generates is added to activated carbon filter 4 and reverse osmosis concentrated water conveyance conduit respectively；
The CO2The outlet of throwing device 11 is connect with middle water conveyance conduit, and tie point is between ultrafiltration pond and reverse osmosis pond；
The coagulant drug-adding device 7 and lime chemicals dosing plant 8 are connect with coagulating basin 1；The connection of mud discharging device 9 precipitating/clear
Clear pond.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection of the invention
Within the scope of.
Claims (9)
1. the bi-membrane method recycled water advanced treatment based on control membrane fouling improves technique, it is characterised in that: living including pretreatment, ozone
The processing of property charcoal, hyperfiltration treatment, CO2Adjust pH value, reverse osmosis, reverse osmosis concentrated water partial reflux；The reverse osmosis concentrated water section returns
Stream, reverse osmosis concentrated water section flow back after using ozone oxidation.
2. the bi-membrane method recycled water advanced treatment according to claim 1 based on control membrane fouling improves technique, feature exists
In: the ozone and activated carbon processing, ozone dosage 2-5mg/L；The CO2Processing, using CO2After carrying out pH adjusting, reverse osmosis
Saturating inlet flow-patterm controls 5.6-7.0.
3. the bi-membrane method recycled water advanced treatment according to claim 1 based on control membrane fouling improves technique, feature exists
In: the reflux ratio of the reverse osmosis concentrated water partial reflux, reverse osmosis concentrated water is 1:4~1:1, after ozone Oxidation Treatment, with
Raw water mixing, the reverse osmosis concentrated water concentrated water of reflux and the mixed proportion of raw water are 1:5~1:2；The ozone Oxidation Treatment, ozone
Dosage be 2-5mg/L.
4. the bi-membrane method recycled water advanced treatment according to claim 1 based on control membrane fouling improves technique, feature exists
In the pretreatment, using lime coagulation and sand filtration carry out in water pretreatment, adding comprising flocculant/flocculation aid and lime,
Coagulation whipping process, precipitating or clarifying process, sand filtration process.
5. the bi-membrane method recycled water advanced treatment according to claim 4 based on control membrane fouling improves technique and device,
Be characterized in that: coagulation and sand filtration process concrete operations parameter the water water quality in is adjusted, and the flocculant of selection is
Aggressiveness substance；The solid-liquid separation tank of selection is sedimentation basin, inclined-plate clarifying basin, mechanical accelerating purifying pool, becomes in hole filtering pool
It is a kind of.
6. the bi-membrane method recycled water advanced treatment according to claim 5 based on control membrane fouling improves technique and device,
Be characterized in that: the flocculant is aluminium chloride, iron chloride, aluminium polychloride, polyaluminium sulfate, poly-ferric chloride, polyaluminium
One of ferro-aluminum, chitosan；The flocculation aid is polyacrylamide.
7. the bi-membrane method recycled water advanced treatment according to claim 4 based on control membrane fouling improves technique and device,
Be characterized in that: the pretreatment, Lime-Injecting amount are 300-600mg/L, and the dosage of flocculant is 200-300 mg/L.
8. the bi-membrane method recycled water advanced treatment according to claim 1 based on control membrane fouling improves technique, feature exists
In: the active carbon is one of industrial activited carbon, charcoal, modified activated carbon, composite activated carbon；
The ultrafiltration, the ultrafiltration membrane used for hollow-fibre membrane, plate membrane or rolled film, membrane material be cellulose acetate, polysulfones,
Polyether sulfone, Kynoar or polytetrafluoroethylene (PTFE)；
It is described it is reverse osmosis be low pressure reverse osmosis membrane process, membrane module is rolled membrane module.
9. the bi-membrane method recycled water advanced treatment based on control membrane fouling improves device, it is characterised in that: described device includes coagulation
Pond, precipitating/clarifying basin, sand filter, activated carbon filter, ultrafiltration apparatus, CO2Throwing device, cartridge filter, reverse osmosis unit,
Ozone occurs and throwing device, coagulant drug-adding device, lime chemicals dosing plant, mud discharging device；The coagulating basin, precipitating/clarification
Pond, sand filter, activated carbon filter, ultrafiltration apparatus, cartridge filter, reverse osmosis unit are sequentially connected, the reverse osmosis unit packet
Include first outlet and second outlet；The first outlet exports pure water, second outlet output infiltration concentrated water；The second outlet is logical
Reverse osmosis concentrated water conveyance conduit is crossed to connect with coagulating basin, it is further mixed with raw water for reverse osmosis concentrated water to be transported to coagulating basin
It closes；
The ozone occurs and throwing device, connect with activated carbon filter entrance and reverse osmosis concentrated water conveyance conduit；The ozone
Occur and the ozone of throwing device generation is added to activated carbon filter and reverse osmosis concentrated water conveyance conduit respectively；
The CO2The outlet of throwing device is connect with middle water conveyance conduit, and tie point is between ultrafiltration pond and reverse osmosis pond；
The coagulant drug-adding device and lime chemicals dosing plant are connect with coagulating basin；The mud discharging device connects precipitating/clarifying basin.
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| CN110002636A (en) * | 2019-05-10 | 2019-07-12 | 江苏元贞智能科技有限公司 | A kind of rain water using device based on new energy |
| CN110395789A (en) * | 2019-08-05 | 2019-11-01 | 南京工程学院 | A kind of Treated sewage reusing processing method and processing device |
| CN112551734A (en) * | 2020-11-11 | 2021-03-26 | 赤峰云铜有色金属有限公司 | Pretreatment process of double-membrane method |
| CN112679029A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Coal gasification sewage reuse treatment method and device |
| CN113582422A (en) * | 2021-08-05 | 2021-11-02 | 福建省福能龙安热电有限公司 | Reclaimed water recycling treatment system for treating sewage plant in synthetic leather industrial area |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110002636A (en) * | 2019-05-10 | 2019-07-12 | 江苏元贞智能科技有限公司 | A kind of rain water using device based on new energy |
| CN110395789A (en) * | 2019-08-05 | 2019-11-01 | 南京工程学院 | A kind of Treated sewage reusing processing method and processing device |
| CN112679029A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Coal gasification sewage reuse treatment method and device |
| CN112551734A (en) * | 2020-11-11 | 2021-03-26 | 赤峰云铜有色金属有限公司 | Pretreatment process of double-membrane method |
| CN113582422A (en) * | 2021-08-05 | 2021-11-02 | 福建省福能龙安热电有限公司 | Reclaimed water recycling treatment system for treating sewage plant in synthetic leather industrial area |
| CN113582422B (en) * | 2021-08-05 | 2022-06-28 | 福建省福能龙安热电有限公司 | Handle synthetic leather industry district sewage factory normal water recycling processing system |
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