CN108249643A - A kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods and device - Google Patents

A kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods and device Download PDF

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Publication number
CN108249643A
CN108249643A CN201810133482.6A CN201810133482A CN108249643A CN 108249643 A CN108249643 A CN 108249643A CN 201810133482 A CN201810133482 A CN 201810133482A CN 108249643 A CN108249643 A CN 108249643A
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China
Prior art keywords
water
nanofiltration
reverse osmosis
ultrafiltration
pump
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CN201810133482.6A
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Chinese (zh)
Inventor
李学勤
姚付江
张旭东
王兵
王文丁
徐正强
李娜
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SHANDONG AMS ENVIRONMENTAL ENGINEERING Ltd
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SHANDONG AMS ENVIRONMENTAL ENGINEERING Ltd
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Priority to CN201810133482.6A priority Critical patent/CN108249643A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/722Oxidation by peroxides
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/725Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08Seawater, e.g. for desalination

Abstract

The invention discloses a kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods and device, method includes pretreatment, ultrafiltration membrane treatment, nanofiltration membrane treatment, reverse osmosis membrane processing and strong brine and handles five steps;Its device includes pretreatment unit, ultrafiltration membrane treatment unit, nanofiltration membrane treatment unit, reverse osmosis membrane processing unit and strong brine processing unit.The three embrane method seaweed processing waste water advanced treatment and reclamation method of one kind and device of the present invention is compared to the prior art, have the characteristics that reasonable design, installation operation are convenient, the advanced treatment and reclamation of seaweed processing waste water is realized, largely can substitute fresh water by remanufacture waste water;Each technique unit technology maturation, treatment effeciency are high, and reagent cost, equipment cost, energy consumption are all relatively low, so as to solve the problems, such as that seaweed processing water consumption is big.

Description

A kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods and device
Technical field
The present invention relates to field of industrial waste water treatment, specifically three embrane method seaweed processing waste water advanced treating of one kind is returned Use method and device.
Background technology
Seaweed processing water consumption is big, and wastewater treatment difficulty is high.Treatment process is anti-for desilting adjusting-flocculation currently popular - sedimentation basin-ABR reaction tanks-contact-oxidation pool-biofilter-air-flotation process-is answered to be discharged into city planting ductwork.Due to seaweed Containing many hardly degraded organic substances in processing waste water, the water after above-mentioned treatment process can neither be back to production technology, Level-one emission standard A is not achieved, city planting ductwork can only be discharged into, goes to handle again into municipal sewage plant.This both causes water resource Waste increase the processing load of municipal sewage plant again.
Invention content
The technical assignment of the present invention is to provide a kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods and device.
The technical assignment of the present invention is realized in the following manner:
A kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods, including pretreatment, ultrafiltration membrane treatment, nanofiltration membrane treatment, Reverse osmosis membrane processing and strong brine handle five steps;
The Effect of Pretreatment is the water quality for adjusting preprocessing system water, discharges the impurity filtered out;
The ultrafiltration membrane treatment effect is the fine suspension further removed in pretreated water;
Described nanofiltration membrane treatment effect is dissolubility colloid, the divalent anions and canons removed in the water after ultrafiltration membrane treatment, both Reduction content of organics reduces the salt content in water again;
Described reverse osmosis membrane processing effect is the salt content in the further production water reduced after nanofiltration membrane treatment, filter out virus, Bacterium, production water are back to production technology instead of fresh water;
The strong brine processing effect is to reduce the COD of nanofiltration membrane treatment link strong brine, reaches and is discharged into city planting ductwork Water quality requirement.
This method is as follows:
Step 1)Pretreatment:Preprocessing system water initially enters regulating reservoir, will by the stirring action of blender in regulating reservoir Preprocessing system water and the concentrated water of ultrafiltration apparatus reflux carry out homogenization, pump discharge part mud laden water by muddy water to control The suspended matter mass percent concentration for adjusting pool inner water is 3-5%;
Step 2)Ultrafiltration membrane treatment:Pretreated water boosts to 0.1-0.3MPa by ultrafiltration feed pump and enters ultrafiltration apparatus, For the concentrate recirculation of ultrafiltration apparatus to regulating reservoir, the production water of ultrafiltration apparatus enters ultrafiltration water producing tank;
Step 3)Nanofiltration membrane treatment:The water of ultrafiltration membrane treatment enters nanofiltration after nanofiltration feed pump is pressurized to 0.3-0.5MPa to be protected Pacify filter, enter nanofiltration device after boosting using nanofiltration high-pressure pump, the production water of nanofiltration device enters nanofiltration water producing tank;
Step 4)Reverse osmosis membrane processing:The water of nanofiltration membrane treatment enters anti-after reverse osmosis feedwater pump is pressurized to 0.2-0.4MPa Cartridge filter is permeated, then enters reverse osmosis unit after reverse osmosis high-pressure pump boosting, the production water of reverse osmosis unit enters reverse osmosis Saturating water producing tank;
Step 5)Strong brine processing:Enter oxidizing tower after the water of nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing, by iron Enter Fenton reactor after carbon micro-electrolysis oxidation processes, the water outlet of Fenton reactor enters iron cement sedimentation basin;Iron cement sedimentation basin goes out Water management COD is less than 500 mg/l, and suspension content is less than 70 mg/l, and ammonia-nitrogen content is less than 25 mg/l, is discharged into municipal administration later Pipe network.
The step 1)In, 30-50 revs/min of the rotating speed of blender in regulating reservoir.
The step 2)In, the producing water ratio 10-25% of ultrafiltration apparatus is controlled, production water turbidity is less than 0.2NTU;
When ultrafiltration apparatus needs to carry out chemical cleaning, the acid of configuration quality percent concentration 0.1-0.5% is molten in ultrafiltration cleaning case The liquid either liquor natrii hypochloritis of the aqueous slkali of mass percent concentration 0.1-0.5% or mass percent concentration 0.5%, then Wash cycles are carried out by ultrafiltration cleaning pump, PH10-12 is controlled when control PH1.5-3 or aqueous slkali clean when acid solution cleans Or liquor natrii hypochloritis cleans time control effective chlorine density 2000-5000ppm.
The step 3)In, nanofiltration high pressure revolution speed is adjusted by frequency converter to control the intake pressure of nanofiltration device 0.9-1.5Mpa;Control producing water ratio 60-80%, COD the removal efficiency 80-99%, sulfate radical removal efficiency 95-98% of nanofiltration device;
Water needs that antisludging agent is added on nanofiltration feedwater pump discharge pipe by antisludging agent chemicals dosing plant before entering nanofiltration device;
When nanofiltration device needs to carry out chemical cleaning, the acid of mass percent concentration 0.05-0.1% is prepared in chemical cleaning case Then the aqueous slkali of solution or mass percent concentration 0.1-0.5% is recycled by chemical cleaning pump in nanofiltration device Cleaning controls PH11-13 when control PH1.5-2.5 or aqueous slkali clean when acid solution cleans.
The step 4)In, the rotating speed of reverse osmosis high-pressure pump is adjusted by frequency converter to control reverse osmosis unit influent pressure Power 1.4-1.8Mpa;Reverse osmosis unit producing water ratio 70-85% is controlled, salt rejection rate is more than 95%.
The step 5)In, entering oxidation after the water of the nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing It needs to add hydrochloric acid by means for feeding acid before tower, adjusts the water inlet PH2-5 of oxidizing tower, need to pass through aeration when oxidizing tower is run Wind turbine is aerated;
Oxidizing tower water outlet needs, by the way that ferrous sulfate device is added to add ferrous sulfate solution, to need to lead to before entering Fenton reactor It crosses plus hydrogen peroxide plant adds hydrogen peroxide, it is 1-3 times of hydrogen peroxide concentration that ferrous ion concentration is controlled when adding;
The water outlet of Fenton reactor needs before entering iron cement sedimentation basin plus alkali adjusts PH8-9.
A kind of three embrane method seaweed processing waste water advanced treatment and reclamation devices, including pretreatment unit, ultrafiltration membrane treatment unit, Nanofiltration membrane treatment unit, reverse osmosis membrane processing unit and strong brine processing unit;
The pretreatment unit includes regulating reservoir and muddy water pumps, and upper inlet and the pre-treatment of the regulating reservoir carry out waterpipe It connects, the inlet communication that the side exit of the regulating reservoir is pumped with the muddy water, before the outlet of muddy water pump Processing system;
It is clear that the ultrafiltration membrane treatment unit includes ultrafiltration feed pump, ultrafiltration apparatus, ultrafiltration water producing tank, ultrafiltration cleaning case and ultrafiltration Wash pump;The import of the ultrafiltration feed pump is connected by pipeline with the side exit of the regulating reservoir, and the ultrafiltration is given By pipeline and the inlet communication of the ultrafiltration apparatus, a way outlet of the ultrafiltration apparatus passes through pipeline for the outlet of water pump With the inlet communication of ultrafiltration water producing tank;Another way passes through reflux line and the inlet communication of regulating reservoir;The ultrafiltration apparatus leads to Piping is connected with the ultrafiltration cleaning case and ultrafiltration cleaning pump circulation;
The nanofiltration membrane treatment unit includes nanofiltration feed pump, nanofiltration cartridge filter, nanofiltration high-pressure pump, nanofiltration device, receives Filter water producing tank, antisludging agent chemicals dosing plant and chemical cleaning case;The import of the nanofiltration feed pump is surpassed by pipeline and described The outlet of water producing tank is filtered, the outlet of the nanofiltration feed pump passes through the import of pipeline and the nanofiltration cartridge filter Connection, by the inlet communication of pipeline and the nanofiltration high-pressure pump, described receives for the outlet of the nanofiltration cartridge filter The outlet of high-pressure pump is filtered by pipeline and the inlet communication of the nanofiltration device, the outlet of the nanofiltration device passes through pipeline With the inlet communication of the nanofiltration water producing tank, the nanofiltration device is followed by pipeline and chemical cleaning case and chemical cleaning pump Ring connects;
The reverse osmosis membrane processing unit includes reverse osmosis feedwater pump, reverse osmosis cartridge filter, reverse osmosis high-pressure pump, reverse osmosis Saturating device and reverse osmosis produced water tank;The outlet that the import of the reverse osmosis feedwater pump passes through pipeline and the nanofiltration water producing tank Connection, the outlet of the reverse osmosis feedwater pump are described by pipeline and the inlet communication of the reverse osmosis cartridge filter Reverse osmosis cartridge filter the inlet communication that is pumped by pipeline with the reverse osmosis high-pressure of outlet, the reverse osmosis height By the inlet communication of pipeline and the reverse osmosis unit, the outlet of the reverse osmosis unit passes through pipeline for the outlet of press pump It is connected with the reverse osmosis produced water tank;
The strong brine processing unit includes oxidizing tower, Fenton reactor and iron cement sedimentation basin;The import of the oxidizing tower By pipeline and the nanofiltration device outlet, the outlet of the oxidizing tower connects with the import of the Fenton reactor Logical, the outlet of the Fenton reactor passes through pipeline and the inlet communication of the iron cement sedimentation basin.
Blender one is installed in the regulating reservoir;Blender two is installed in the ultrafiltration cleaning case;Described Blender three is installed in chemical cleaning case;Blender four is installed in the Fenton reactor.
The outlet conduit connection antisludging agent chemicals dosing plant of the nanofiltration feed pump;The oxidizing tower inlet pipeline connection Means for feeding acid, oxidizing tower air inlet connection Aeration fan;The inlet communication of the Fenton reactor adds ferrous sulfate Device and plus hydrogen peroxide plant;The inlet communication of the iron cement sedimentation basin adds alkali pipeline.
Compared to the prior art the three embrane method seaweed processing waste water advanced treatment and reclamation method of one kind and device of the present invention, has There is the features such as reasonable design, installation operation facilitate, realize the advanced treatment and reclamation of seaweed processing waste water, can largely recycle life It produces waste water and substitutes fresh water;Each technique unit technology maturation, treatment effeciency are high, and reagent cost, equipment cost, energy consumption are all relatively low, So as to solve the problems, such as that seaweed processing water consumption is big.
Description of the drawings
Attached drawing 1 is a kind of structure diagram of three embrane methods seaweed processing waste water advanced treatment and reclamation device;
In figure:A, pretreatment unit, B, ultrafiltration film unit, C, nanofiltration film unit, D, reverse osmosis membrane processing unit, at E, strong brine Manage unit;
1st, regulating reservoir, 101, blender one, 2, muddy water pump, 3, ultrafiltration feed pump, 4, ultrafiltration apparatus, 5, ultrafiltration water producing tank, 6, super Filtering tank-washer, 601, blender two, 7, ultrafiltration cleaning pump, 8, nanofiltration feed pump, 9, nanofiltration cartridge filter, 10, nanofiltration high pressure Pump, 11, nanofiltration device, 12, nanofiltration water producing tank, 13, antisludging agent chemicals dosing plant, 14, chemical cleaning case, 1401, blender three, 15th, chemical cleaning pump, 16, reverse osmosis feedwater pump, 17, reverse osmosis cartridge filter, 18, reverse osmosis high-pressure pump, 19, reverse osmosis dress It puts, 20, reverse osmosis produced water tank, 21, means for feeding acid, 22, Aeration fan, 23, oxidizing tower, 24, Fenton reactor, 2401, stirring Device four, 25, plus ferrous sulfate device, 26 plus hydrogen peroxide plant, 27, iron cement sedimentation basin.
Specific embodiment
Embodiment 1:
Assembly equipment:
Three embrane method seaweed processing waste water advanced treatment and reclamation devices include pretreatment unit A, ultrafiltration membrane treatment unit B, NF membrane Processing unit C, reverse osmosis membrane processing cells D and strong brine processing unit E;
The pretreatment unit A includes regulating reservoir 1 and muddy water pump 2, and blender 1 is equipped in the regulating reservoir 1;Institute The upper inlet for the regulating reservoir 1 stated is carried out waterpipe with pre-treatment and is connected, the side exit of the regulating reservoir 1 and the muddy water The inlet communication of pump 2, the outlet preprocessing system of muddy water pump 2;
The ultrafiltration membrane treatment unit B includes ultrafiltration feed pump 3, ultrafiltration apparatus 4, ultrafiltration water producing tank 5,6 and of ultrafiltration cleaning case Ultrafiltration cleaning pump 7;Blender 2 601 is installed in the ultrafiltration cleaning case 6;The import of the ultrafiltration feed pump 3 passes through Pipeline is connected with the side exit of the regulating reservoir 1, and the outlet of the ultrafiltration feed pump 3 passes through pipeline and the ultrafiltration The inlet communication of device 4, a way outlet of the ultrafiltration apparatus 4 pass through pipeline and the inlet communication of ultrafiltration water producing tank 5;It is another Road passes through reflux line and the inlet communication of regulating reservoir 1;The ultrafiltration apparatus 4 passes through pipeline and the ultrafiltration cleaning case 6 It is connected with the cycle of ultrafiltration cleaning pump 7;
The nanofiltration membrane treatment unit C includes nanofiltration feed pump 8, nanofiltration cartridge filter 9, nanofiltration high-pressure pump 10, nanofiltration dress Put 11, nanofiltration water producing tank 12, antisludging agent chemicals dosing plant 13 and chemical cleaning case 14;The import of the nanofiltration feed pump 8 passes through Pipeline and the outlet of the ultrafiltration water producing tank 5, the outlet conduit connection antisludging agent dosing dress of the nanofiltration feed pump 8 Put 13;The outlet of the nanofiltration feed pump 8 is described by pipeline and the inlet communication of the nanofiltration cartridge filter 9 The outlet of nanofiltration cartridge filter 9 passes through the inlet communication of pipeline and the nanofiltration high-pressure pump 10, the nanofiltration high-pressure pump 10 outlet by the inlet communication of pipeline and the nanofiltration device 11, the outlet of the nanofiltration device 11 by pipeline with The inlet communication of the nanofiltration water producing tank 12, the nanofiltration device 11 pass through pipeline and chemical cleaning case 14 and chemical cleaning 15 cycle connection of pump;Blender 3 1401 is installed in the chemical cleaning case 14;
The nano filter membrance device 11 is to C a2+、Mg2+、SO4 2-Etc. divalent and multivalent ion height retention, to Na+、K+、Cl-Deng The dedicated separation film composition of the low retention of monovalention, especially has good separating effect to deliquescent colloid.
The reverse osmosis membrane processing cells D includes reverse osmosis feedwater pump 16, reverse osmosis cartridge filter 17, reverse osmosis height Press pump 18, reverse osmosis unit 19 and reverse osmosis produced water tank 20;The import of the reverse osmosis feedwater pump 16 by pipeline with it is described Nanofiltration water producing tank 12 outlet, the outlet of the reverse osmosis feedwater pump 16 passes through pipeline and the reverse osmosis cartridge The inlet communication of filter 17, the outlet of the reverse osmosis cartridge filter 17 are pumped by pipeline and the reverse osmosis high-pressure 18 inlet communication, the outlet of reverse osmosis high-pressure pump 18 are connected by the import of pipeline and the reverse osmosis unit 19 Logical, the outlet of the reverse osmosis unit 19 is connected by pipeline with the reverse osmosis produced water tank 20;
The strong brine processing unit E includes oxidizing tower 23, Fenton reactor 24 and iron cement sedimentation basin 27;The oxidizing tower 23 inlet pipelines connect means for feeding acid 21,23 air inlet of oxidizing tower connection Aeration fan 22;The oxidizing tower 23 Import passes through pipeline and 11 outlet of nanofiltration device, outlet and the Fenton reactor of the oxidizing tower 23 24 inlet communication is equipped with blender 4 2401, the import of the Fenton reactor 24 in the Fenton reactor 24 Connection plus ferrous sulfate device 25 and plus hydrogen peroxide plant 26;The Fenton reactor 24 outlet by pipeline with it is described The inlet communication of iron cement sedimentation basin 27;The inlet communication of the iron cement sedimentation basin 27 adds alkali pipeline.
Treatment process:
Three embrane method seaweed processing waste water advanced treatment and reclamation methods include pretreatment, ultrafiltration membrane treatment, nanofiltration membrane treatment, reverse osmosis Film process and strong brine handle five steps;
This method is as follows:
Step 1)Pretreatment:The Effect of Pretreatment is the water quality for adjusting preprocessing system water, discharges the impurity filtered out;Before Processing system water initially enters regulating reservoir 1, by the stirring action of in regulating reservoir 1 blender 1 by preprocessing system The concentrated water that water and ultrafiltration apparatus 4 flow back carries out homogenization, 30 revs/min of the rotating speed of blender 1 in regulating reservoir 1;It is logical It crosses muddy water and pumps 2 discharge part mud laden waters to control to adjust the suspended matter mass percent concentration of water in pond 1 as 3%;
Step 2)Ultrafiltration membrane treatment:The ultrafiltration membrane treatment effect is the tiny suspension further removed in pretreated water Object;Pretreated water boosts to 0.1MPa by ultrafiltration feed pump 3 and enters ultrafiltration apparatus 4, and the concentrate recirculation of ultrafiltration apparatus 4 arrives Regulating reservoir 1, the production water of ultrafiltration apparatus 4 enter ultrafiltration water producing tank 5;
Control the producing water ratio 10% of ultrafiltration apparatus 4, production water turbidity 0.2NTU;When ultrafiltration apparatus 4 needs to carry out chemical cleaning, super The hydrochloric acid solution of configuration quality percent concentration 0.1%, 0.3% or 0.5% in filtering tank-washer 6, then by ultrafiltration cleaning pump 7 into Row wash cycles control PH1.5,2 or 3 when hydrochloric acid solution cleans.
Step 3)Nanofiltration membrane treatment:Described nanofiltration membrane treatment effect is the dissolubility removed in the water after ultrafiltration membrane treatment Colloid, divalent anions and canons had not only reduced content of organics but also had reduced the salt content in water;The water of ultrafiltration membrane treatment passes through nanofiltration Feed pump 8 enters nanofiltration cartridge filter 9 after being pressurized to 0.3MPa, enters nanofiltration device after boosting using nanofiltration high-pressure pump 10 11, the production water of nanofiltration device 11 enters nanofiltration water producing tank 12;
10 rotating speed of nanofiltration high-pressure pump is adjusted by frequency converter to control the intake pressure 0.9Mpa of nanofiltration device 11;Control nanofiltration dress Put 11 producing water ratio 60%, COD removal efficiencies 80%, sulfate radical removal efficiency 95%;Water is needed before entering nanofiltration device 11 by scale inhibition Antisludging agent is added on 8 outlet of nanofiltration feed pump by agent chemicals dosing plant 13;When nanofiltration device 11 needs to carry out chemical cleaning, changing The hydrochloric acid solution that mass percent concentration 0.05%, 0.08% or 0.1% is prepared in cleaning case 14 is learned, then by chemical cleaning pump 15 carry out wash cycles in nanofiltration device 11, and PH1.5,2 or 2.5 is controlled when hydrochloric acid solution cleans.
Step 4)Reverse osmosis membrane processing:The reverse osmosis membrane processing effect is the further production reduced after nanofiltration membrane treatment Salt content in water, filters out virus, bacterium, and production water is back to production technology instead of fresh water;The water of nanofiltration membrane treatment is by anti- Infiltration feed pump 16 enters reverse osmosis cartridge filter 17, then enter after 18 boosting of reverse osmosis high-pressure pump after being pressurized to 0.2MPa Reverse osmosis unit 19, the production water of reverse osmosis unit 19 enter reverse osmosis produced water tank 20;
The rotating speed of reverse osmosis high-pressure pump 18 is adjusted by frequency converter to control 19 intake pressure 1.4Mpa of reverse osmosis unit;Control is anti- 19 producing water ratio 70% of permeability apparatus, salt rejection rate 95%.
Step 5)Strong brine processing:The strong brine processing effect is to reduce the COD of nanofiltration membrane treatment link strong brine, Reach the water quality requirement for being discharged into city planting ductwork;Enter oxidation after the water of nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing Tower 23, enters Fenton reactor 24 after iron-carbon micro-electrolysis oxidation processes, and the water outlet of Fenton reactor 24 enters iron cement precipitation Pond 27;Iron cement sedimentation basin 27 goes out water management COD500 mg/l, 70 mg/l of suspension content, 25 mg/l of ammonia-nitrogen content, heel row Enter city planting ductwork.
It needs to lead to before oxidizing tower 23 is entered after the water of the nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing Cross means for feeding acid 21 add hydrochloric acid, adjust oxidizing tower 23 water inlet PH2, oxidizing tower 23 run when need by Aeration fan 22 into Row aeration;The water outlet of oxidizing tower 23 needs molten by the way that ferrous sulfate device 25 is added to add ferrous sulfate before entering Fenton reactor 24 Liquid is needed by the way that hydrogen peroxide plant 26 is added to add hydrogen peroxide, and it is 1 times of hydrogen peroxide concentration that ferrous ion concentration is controlled when adding; The water outlet of Fenton reactor 24 needs before entering iron cement sedimentation basin 27 plus alkali adjusts PH8.
Embodiment 2:
Assembly equipment:
Three embrane method seaweed processing waste water advanced treatment and reclamation devices include pretreatment unit A, ultrafiltration membrane treatment unit B, NF membrane Processing unit C, reverse osmosis membrane processing cells D and strong brine processing unit E;
The pretreatment unit A includes regulating reservoir 1 and muddy water pump 2, and blender 1 is equipped in the regulating reservoir 1;Institute The upper inlet for the regulating reservoir 1 stated is carried out waterpipe with pre-treatment and is connected, the side exit of the regulating reservoir 1 and the muddy water The inlet communication of pump 2, the outlet preprocessing system of muddy water pump 2;
The ultrafiltration membrane treatment unit B includes ultrafiltration feed pump 3, ultrafiltration apparatus 4, ultrafiltration water producing tank 5,6 and of ultrafiltration cleaning case Ultrafiltration cleaning pump 7;Blender 2 601 is installed in the ultrafiltration cleaning case 6;The import of the ultrafiltration feed pump 3 passes through Pipeline is connected with the side exit of the regulating reservoir 1, and the outlet of the ultrafiltration feed pump 3 passes through pipeline and the ultrafiltration The inlet communication of device 4, a way outlet of the ultrafiltration apparatus 4 pass through pipeline and the inlet communication of ultrafiltration water producing tank 5;It is another Road passes through reflux line and the inlet communication of regulating reservoir 1;The ultrafiltration apparatus 4 passes through pipeline and the ultrafiltration cleaning case 6 It is connected with the cycle of ultrafiltration cleaning pump 7;
The nanofiltration membrane treatment unit C includes nanofiltration feed pump 8, nanofiltration cartridge filter 9, nanofiltration high-pressure pump 10, nanofiltration dress Put 11, nanofiltration water producing tank 12, antisludging agent chemicals dosing plant 13 and chemical cleaning case 14;The import of the nanofiltration feed pump 8 passes through Pipeline and the outlet of the ultrafiltration water producing tank 5, the outlet conduit connection antisludging agent dosing dress of the nanofiltration feed pump 8 Put 13;The outlet of the nanofiltration feed pump 8 is described by pipeline and the inlet communication of the nanofiltration cartridge filter 9 The outlet of nanofiltration cartridge filter 9 passes through the inlet communication of pipeline and the nanofiltration high-pressure pump 10, the nanofiltration high-pressure pump 10 outlet by the inlet communication of pipeline and the nanofiltration device 11, the outlet of the nanofiltration device 11 by pipeline with The inlet communication of the nanofiltration water producing tank 12, the nanofiltration device 11 pass through pipeline and chemical cleaning case 14 and chemical cleaning 15 cycle connection of pump;Blender 3 1401 is installed in the chemical cleaning case 14;
The nano filter membrance device 11 is to C a2+、Mg2+、SO4 2-Etc. divalent and multivalent ion height retention, to Na+、K+、Cl-Deng The dedicated separation film composition of the low retention of monovalention, especially has good separating effect to deliquescent colloid.
The reverse osmosis membrane processing cells D includes reverse osmosis feedwater pump 16, reverse osmosis cartridge filter 17, reverse osmosis height Press pump 18, reverse osmosis unit 19 and reverse osmosis produced water tank 20;The import of the reverse osmosis feedwater pump 16 by pipeline with it is described Nanofiltration water producing tank 12 outlet, the outlet of the reverse osmosis feedwater pump 16 passes through pipeline and the reverse osmosis cartridge The inlet communication of filter 17, the outlet of the reverse osmosis cartridge filter 17 are pumped by pipeline and the reverse osmosis high-pressure 18 inlet communication, the outlet of reverse osmosis high-pressure pump 18 are connected by the import of pipeline and the reverse osmosis unit 19 Logical, the outlet of the reverse osmosis unit 19 is connected by pipeline with the reverse osmosis produced water tank 20;
The strong brine processing unit E includes oxidizing tower 23, Fenton reactor 24 and iron cement sedimentation basin 27;The oxidizing tower 23 inlet pipelines connect means for feeding acid 21,23 air inlet of oxidizing tower connection Aeration fan 22;The oxidizing tower 23 Import passes through pipeline and 11 outlet of nanofiltration device, outlet and the Fenton reactor of the oxidizing tower 23 24 inlet communication is equipped with blender 4 2401, the import of the Fenton reactor 24 in the Fenton reactor 24 Connection plus ferrous sulfate device 25 and plus hydrogen peroxide plant 26;The Fenton reactor 24 outlet by pipeline with it is described The inlet communication of iron cement sedimentation basin 27;The inlet communication of the iron cement sedimentation basin 27 adds alkali pipeline.
Treatment process:
Three embrane method seaweed processing waste water advanced treatment and reclamation methods include pretreatment, ultrafiltration membrane treatment, nanofiltration membrane treatment, reverse osmosis Film process and strong brine handle five steps;
This method is as follows:
Step 1)Pretreatment:The Effect of Pretreatment is the water quality for adjusting preprocessing system water, discharges the impurity filtered out;Before Processing system water initially enters regulating reservoir 1, by the stirring action of in regulating reservoir 1 blender 1 by preprocessing system The concentrated water that water and ultrafiltration apparatus 4 flow back carries out homogenization, 40 revs/min of the rotating speed of blender 1 in regulating reservoir 1;It is logical It crosses muddy water and pumps 2 discharge part mud laden waters to control to adjust the suspended matter mass percent concentration of water in pond 1 as 4%;
Step 2)Ultrafiltration membrane treatment:The ultrafiltration membrane treatment effect is the tiny suspension further removed in pretreated water Object;Pretreated water boosts to 0.2MPa by ultrafiltration feed pump 3 and enters ultrafiltration apparatus 4, and the concentrate recirculation of ultrafiltration apparatus 4 arrives Regulating reservoir 1, the production water of ultrafiltration apparatus 4 enter ultrafiltration water producing tank 5;
Control the producing water ratio 20% of ultrafiltration apparatus 4, production water turbidity 0.15NTU;When ultrafiltration apparatus 4 needs to carry out chemical cleaning, super The sodium hydroxide solution of configuration quality percent concentration 0.1%, 0.3% or 0.5% in filtering tank-washer 6, then by ultrafiltration cleaning pump 7 carry out wash cycles, and PH10,11 or 12 is controlled when sodium hydroxide solution cleans.
Step 3)Nanofiltration membrane treatment:Described nanofiltration membrane treatment effect is the dissolubility removed in the water after ultrafiltration membrane treatment Colloid, divalent anions and canons had not only reduced content of organics but also had reduced the salt content in water;The water of ultrafiltration membrane treatment passes through nanofiltration Feed pump 8 enters nanofiltration cartridge filter 9 after being pressurized to 0.4MPa, enters nanofiltration device after boosting using nanofiltration high-pressure pump 10 11, the production water of nanofiltration device 11 enters nanofiltration water producing tank 12;
10 rotating speed of nanofiltration high-pressure pump is adjusted by frequency converter to control the intake pressure 1.2Mpa of nanofiltration device 11;Control nanofiltration dress Put 11 producing water ratio 70%, COD removal efficiencies 90%, sulfate radical removal efficiency 96%;Water is needed before entering nanofiltration device 11 by scale inhibition Antisludging agent is added on 8 outlet of nanofiltration feed pump by agent chemicals dosing plant 13;When nanofiltration device 11 needs to carry out chemical cleaning, changing The sodium hydroxide solution that mass percent concentration 0.1%, 0.3% or 0.5% is prepared in cleaning case 14 is learned, then by chemical cleaning Pump 15 carries out wash cycles in nanofiltration device 11, and PH11,12 or 13 is controlled when sodium hydroxide solution cleans.
Step 4)Reverse osmosis membrane processing:The reverse osmosis membrane processing effect is the further production reduced after nanofiltration membrane treatment Salt content in water, filters out virus, bacterium, and production water is back to production technology instead of fresh water;The water of nanofiltration membrane treatment is by anti- Infiltration feed pump 16 enters reverse osmosis cartridge filter 17, then enter after 18 boosting of reverse osmosis high-pressure pump after being pressurized to 0.3MPa Reverse osmosis unit 19, the production water of reverse osmosis unit 19 enter reverse osmosis produced water tank 20;
The rotating speed of reverse osmosis high-pressure pump 18 is adjusted by frequency converter to control 19 intake pressure 1.6Mpa of reverse osmosis unit;Control is anti- 19 producing water ratio 80% of permeability apparatus, salt rejection rate 96%.
Step 5)Strong brine processing:The strong brine processing effect is to reduce the COD of nanofiltration membrane treatment link strong brine, Reach the water quality requirement for being discharged into city planting ductwork;Enter oxidation after the water of nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing Tower 23, enters Fenton reactor 24 after iron-carbon micro-electrolysis oxidation processes, and the water outlet of Fenton reactor 24 enters iron cement precipitation Pond 27;Iron cement sedimentation basin 27 goes out water management COD450 mg/l, 65 mg/l of suspension content, 20 mg/l of ammonia-nitrogen content, heel row Enter city planting ductwork.
It needs to lead to before oxidizing tower 23 is entered after the water of the nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing Cross means for feeding acid 21 add hydrochloric acid, adjust oxidizing tower 23 water inlet PH3, oxidizing tower 23 run when need by Aeration fan 22 into Row aeration;The water outlet of oxidizing tower 23 needs molten by the way that ferrous sulfate device 25 is added to add ferrous sulfate before entering Fenton reactor 24 Liquid is needed by the way that hydrogen peroxide plant 26 is added to add hydrogen peroxide, and it is 2 times of hydrogen peroxide concentration that ferrous ion concentration is controlled when adding; The water outlet of Fenton reactor 24 needs before entering iron cement sedimentation basin 27 plus alkali adjusts PH8.5.
Embodiment 3:
Assembly equipment:
Three embrane method seaweed processing waste water advanced treatment and reclamation devices include pretreatment unit A, ultrafiltration membrane treatment unit B, NF membrane Processing unit C, reverse osmosis membrane processing cells D and strong brine processing unit E;
The pretreatment unit A includes regulating reservoir 1 and muddy water pump 2, and blender 1 is equipped in the regulating reservoir 1;Institute The upper inlet for the regulating reservoir 1 stated is carried out waterpipe with pre-treatment and is connected, the side exit of the regulating reservoir 1 and the muddy water The inlet communication of pump 2, the outlet preprocessing system of muddy water pump 2;
The ultrafiltration membrane treatment unit B includes ultrafiltration feed pump 3, ultrafiltration apparatus 4, ultrafiltration water producing tank 5,6 and of ultrafiltration cleaning case Ultrafiltration cleaning pump 7;Blender 2 601 is installed in the ultrafiltration cleaning case 6;The import of the ultrafiltration feed pump 3 passes through Pipeline is connected with the side exit of the regulating reservoir 1, and the outlet of the ultrafiltration feed pump 3 passes through pipeline and the ultrafiltration The inlet communication of device 4, a way outlet of the ultrafiltration apparatus 4 pass through pipeline and the inlet communication of ultrafiltration water producing tank 5;It is another Road passes through reflux line and the inlet communication of regulating reservoir 1;The ultrafiltration apparatus 4 passes through pipeline and the ultrafiltration cleaning case 6 It is connected with the cycle of ultrafiltration cleaning pump 7;
The nanofiltration membrane treatment unit C includes nanofiltration feed pump 8, nanofiltration cartridge filter 9, nanofiltration high-pressure pump 10, nanofiltration dress Put 11, nanofiltration water producing tank 12, antisludging agent chemicals dosing plant 13 and chemical cleaning case 14;The import of the nanofiltration feed pump 8 passes through Pipeline and the outlet of the ultrafiltration water producing tank 5, the outlet conduit connection antisludging agent dosing dress of the nanofiltration feed pump 8 Put 13;The outlet of the nanofiltration feed pump 8 is described by pipeline and the inlet communication of the nanofiltration cartridge filter 9 The outlet of nanofiltration cartridge filter 9 passes through the inlet communication of pipeline and the nanofiltration high-pressure pump 10, the nanofiltration high-pressure pump 10 outlet by the inlet communication of pipeline and the nanofiltration device 11, the outlet of the nanofiltration device 11 by pipeline with The inlet communication of the nanofiltration water producing tank 12, the nanofiltration device 11 pass through pipeline and chemical cleaning case 14 and chemical cleaning 15 cycle connection of pump;Blender 3 1401 is installed in the chemical cleaning case 14;
The nano filter membrance device 11 is to C a2+、Mg2+、SO4 2-Etc. divalent and multivalent ion height retention, to Na+、K+、Cl-Deng The dedicated separation film composition of the low retention of monovalention, especially has good separating effect to deliquescent colloid.
The reverse osmosis membrane processing cells D includes reverse osmosis feedwater pump 16, reverse osmosis cartridge filter 17, reverse osmosis height Press pump 18, reverse osmosis unit 19 and reverse osmosis produced water tank 20;The import of the reverse osmosis feedwater pump 16 by pipeline with it is described Nanofiltration water producing tank 12 outlet, the outlet of the reverse osmosis feedwater pump 16 passes through pipeline and the reverse osmosis cartridge The inlet communication of filter 17, the outlet of the reverse osmosis cartridge filter 17 are pumped by pipeline and the reverse osmosis high-pressure 18 inlet communication, the outlet of reverse osmosis high-pressure pump 18 are connected by the import of pipeline and the reverse osmosis unit 19 Logical, the outlet of the reverse osmosis unit 19 is connected by pipeline with the reverse osmosis produced water tank 20;
The strong brine processing unit E includes oxidizing tower 23, Fenton reactor 24 and iron cement sedimentation basin 27;The oxidizing tower 23 inlet pipelines connect means for feeding acid 21,23 air inlet of oxidizing tower connection Aeration fan 22;The oxidizing tower 23 Import passes through pipeline and 11 outlet of nanofiltration device, outlet and the Fenton reactor of the oxidizing tower 23 24 inlet communication is equipped with blender 4 2401, the import of the Fenton reactor 24 in the Fenton reactor 24 Connection plus ferrous sulfate device 25 and plus hydrogen peroxide plant 26;The Fenton reactor 24 outlet by pipeline with it is described The inlet communication of iron cement sedimentation basin 27;The inlet communication of the iron cement sedimentation basin 27 adds alkali pipeline.
Treatment process:
Three embrane method seaweed processing waste water advanced treatment and reclamation methods include pretreatment, ultrafiltration membrane treatment, nanofiltration membrane treatment, reverse osmosis Film process and strong brine handle five steps;
This method is as follows:
Step 1)Pretreatment:The Effect of Pretreatment is the water quality for adjusting preprocessing system water, discharges the impurity filtered out;Before Processing system water initially enters regulating reservoir 1, by the stirring action of in regulating reservoir 1 blender 1 by preprocessing system The concentrated water that water and ultrafiltration apparatus 4 flow back carries out homogenization, 50 revs/min of the rotating speed of blender 1 in regulating reservoir 1;It is logical It crosses muddy water and pumps 2 discharge part mud laden waters to control to adjust the suspended matter mass percent concentration of water in pond 1 as 5%;
Step 2)Ultrafiltration membrane treatment:The ultrafiltration membrane treatment effect is the tiny suspension further removed in pretreated water Object;Pretreated water boosts to 0.3MPa by ultrafiltration feed pump 3 and enters ultrafiltration apparatus 4, and the concentrate recirculation of ultrafiltration apparatus 4 arrives Regulating reservoir 1, the production water of ultrafiltration apparatus 4 enter ultrafiltration water producing tank 5;
Control the producing water ratio 25% of ultrafiltration apparatus 4, production water turbidity 0.1NTU;When ultrafiltration apparatus 4 needs to carry out chemical cleaning, super Then the liquor natrii hypochloritis of configuration quality percent concentration 0.5% in filtering tank-washer 6 carries out circulation cleaning by ultrafiltration cleaning pump 7 It washes, liquor natrii hypochloritis cleans 2000 ppm of time control effective chlorine density, 3000 ppm or 5000ppm.
Step 3)Nanofiltration membrane treatment:Described nanofiltration membrane treatment effect is the dissolubility removed in the water after ultrafiltration membrane treatment Colloid, divalent anions and canons had not only reduced content of organics but also had reduced the salt content in water;The water of ultrafiltration membrane treatment passes through nanofiltration Feed pump 8 enters nanofiltration cartridge filter 9 after being pressurized to 0.5MPa, enters nanofiltration device after boosting using nanofiltration high-pressure pump 10 11, the production water of nanofiltration device 11 enters nanofiltration water producing tank 12;
10 rotating speed of nanofiltration high-pressure pump is adjusted by frequency converter to control the intake pressure 1.5Mpa of nanofiltration device 11;Control nanofiltration dress Put 11 producing water ratio 80%, COD removal efficiencies 99%, sulfate radical removal efficiency 98%;Water is needed before entering nanofiltration device 11 by scale inhibition Antisludging agent is added on 8 outlet of nanofiltration feed pump by agent chemicals dosing plant 13;When nanofiltration device 11 needs to carry out chemical cleaning, changing The hydrochloric acid solution that mass percent concentration 0.07% is prepared in cleaning case 14 is learned, then by chemical cleaning pump 15 in nanofiltration device Wash cycles are carried out in 11, hydrochloric acid solution controls PH2 when cleaning.
Step 4)Reverse osmosis membrane processing:The reverse osmosis membrane processing effect is the further production reduced after nanofiltration membrane treatment Salt content in water, filters out virus, bacterium, and production water is back to production technology instead of fresh water;The water of nanofiltration membrane treatment is by anti- Infiltration feed pump 16 enters reverse osmosis cartridge filter 17, then enter after 18 boosting of reverse osmosis high-pressure pump after being pressurized to 0.4MPa Reverse osmosis unit 19, the production water of reverse osmosis unit 19 enter reverse osmosis produced water tank 20;
The rotating speed of reverse osmosis high-pressure pump 18 is adjusted by frequency converter to control 19 intake pressure 1.8Mpa of reverse osmosis unit;Control is anti- 19 producing water ratio 85% of permeability apparatus, salt rejection rate 97%.
Step 5)Strong brine processing:The strong brine processing effect is to reduce the COD of nanofiltration membrane treatment link strong brine, Reach the water quality requirement for being discharged into city planting ductwork;Enter oxidation after the water of nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing Tower 23, enters Fenton reactor 24 after iron-carbon micro-electrolysis oxidation processes, and the water outlet of Fenton reactor 24 enters iron cement precipitation Pond 27;Iron cement sedimentation basin 27 goes out water management COD400 mg/l, 60 mg/l of suspension content, 15 mg/l of ammonia-nitrogen content, heel row Enter city planting ductwork.
It needs to lead to before oxidizing tower 23 is entered after the water of the nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing Cross means for feeding acid 21 add hydrochloric acid, adjust oxidizing tower 23 water inlet PH5, oxidizing tower 23 run when need by Aeration fan 22 into Row aeration;The water outlet of oxidizing tower 23 needs molten by the way that ferrous sulfate device 25 is added to add ferrous sulfate before entering Fenton reactor 24 Liquid is needed by the way that hydrogen peroxide plant 26 is added to add hydrogen peroxide, and it is 3 times of hydrogen peroxide concentration that ferrous ion concentration is controlled when adding; The water outlet of Fenton reactor 24 needs before entering iron cement sedimentation basin 27 plus alkali adjusts PH9.
The those skilled in the art can readily realize the present invention with the above specific embodiments,.For reality Now above each step function and the appliance arrangements such as mating water pump, wind turbine, pond, pipeline, valve, electrical, instrument is needed not exist It is described in detail;It is understood that the present invention is not limited to above-mentioned several specific embodiments.On the basis of disclosed embodiment On, the those skilled in the art can arbitrarily combine different technical characteristics, so as to fulfill different technical solutions.

Claims (10)

1. a kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods, which is characterized in that at pretreatment, ultrafiltration membrane Reason, nanofiltration membrane treatment, reverse osmosis membrane processing and strong brine handle five steps;
The Effect of Pretreatment is the water quality for adjusting preprocessing system water, discharges the impurity filtered out;
The ultrafiltration membrane treatment effect is the fine suspension further removed in pretreated water;
Described nanofiltration membrane treatment effect is dissolubility colloid, the divalent anions and canons removed in the water after ultrafiltration membrane treatment, both Reduction content of organics reduces the salt content in water again;
Described reverse osmosis membrane processing effect is the salt content in the further production water reduced after nanofiltration membrane treatment, filter out virus, Bacterium, production water are back to production technology instead of fresh water;
The strong brine processing effect is to reduce the COD of nanofiltration membrane treatment link strong brine, reaches and is discharged into city planting ductwork Water quality requirement.
2. according to the method described in claim 1, it is characterized in that, this method is as follows:
Step 1)Pretreatment:Preprocessing system water initially enters regulating reservoir, will by the stirring action of blender in regulating reservoir Preprocessing system water and the concentrated water of ultrafiltration apparatus reflux carry out homogenization, pump discharge part mud laden water by muddy water to control The suspended matter mass percent concentration for adjusting pool inner water is 3-5%;
Step 2)Ultrafiltration membrane treatment:Pretreated water boosts to 0.1-0.3MPa by ultrafiltration feed pump and enters ultrafiltration apparatus, For the concentrate recirculation of ultrafiltration apparatus to regulating reservoir, the production water of ultrafiltration apparatus enters ultrafiltration water producing tank;
Step 3)Nanofiltration membrane treatment:The water of ultrafiltration membrane treatment enters nanofiltration after nanofiltration feed pump is pressurized to 0.3-0.5MPa to be protected Pacify filter, enter nanofiltration device after boosting using nanofiltration high-pressure pump, the production water of nanofiltration device enters nanofiltration water producing tank;
Step 4)Reverse osmosis membrane processing:The water of nanofiltration membrane treatment enters anti-after reverse osmosis feedwater pump is pressurized to 0.2-0.4MPa Cartridge filter is permeated, then enters reverse osmosis unit after reverse osmosis high-pressure pump boosting, the production water of reverse osmosis unit enters reverse osmosis Saturating water producing tank;
Step 5)Strong brine processing:Enter oxidizing tower after the water of nanofiltration membrane treatment and the hydration stream of reverse osmosis membrane processing, by iron Enter Fenton reactor after carbon micro-electrolysis oxidation processes, the water outlet of Fenton reactor enters iron cement sedimentation basin;Iron cement sedimentation basin goes out Water management COD is less than 500 mg/l, and suspension content is less than 70 mg/l, and ammonia-nitrogen content is less than 25 mg/l, is discharged into municipal administration later Pipe network.
3. the according to the method described in claim 1, it is characterized in that, step 1)In, the rotating speed of blender in regulating reservoir 30-50 revs/min.
4. the according to the method described in claim 1, it is characterized in that, step 2)In, control the producing water ratio of ultrafiltration apparatus 10-25%, production water turbidity are less than 0.2NTU;
When ultrafiltration apparatus needs to carry out chemical cleaning, the acid of configuration quality percent concentration 0.1-0.5% is molten in ultrafiltration cleaning case The liquor natrii hypochloritis of the liquid either mass percent concentration 0.5% of aqueous slkali or mass percent concentration 0.1-0.5%, then Wash cycles are carried out by ultrafiltration cleaning pump, PH10-12 is controlled when control PH1.5-3 or aqueous slkali clean when acid solution cleans Or liquor natrii hypochloritis cleans time control effective chlorine density 2000-5000ppm.
5. the according to the method described in claim 1, it is characterized in that, step 3)In, it is high that nanofiltration is adjusted by frequency converter Press pump rotating speed is to control the intake pressure 0.9-1.5Mpa of nanofiltration device;Control producing water ratio 60-80%, the COD removing of nanofiltration device Rate 80-99%, sulfate radical removal efficiency 95-98%;
Water needs that antisludging agent is added on nanofiltration feedwater pump discharge pipe by antisludging agent chemicals dosing plant before entering nanofiltration device;
When nanofiltration device needs to carry out chemical cleaning, the acid of mass percent concentration 0.05-0.1% is prepared in chemical cleaning case Then the aqueous slkali of solution or mass percent concentration 0.1-0.5% is recycled by chemical cleaning pump in nanofiltration device Cleaning controls PH11-13 when control PH1.5-2.5 or aqueous slkali clean when acid solution cleans.
6. the according to the method described in claim 1, it is characterized in that, step 4)In, it is adjusted by frequency converter reverse osmosis The rotating speed of high-pressure pump is to control reverse osmosis unit intake pressure 1.4-1.8Mpa;Reverse osmosis unit producing water ratio 70-85% is controlled, is taken off Salt rate is more than 95%.
7. the according to the method described in claim 1, it is characterized in that, step 5)In, the water of the nanofiltration membrane treatment With after the hydration stream of reverse osmosis membrane processing enter oxidizing tower before need by means for feeding acid add hydrochloric acid, adjust oxidizing tower Water inlet PH2-5, oxidizing tower need to be aerated by Aeration fan when running;
Oxidizing tower water outlet needs, by the way that ferrous sulfate device is added to add ferrous sulfate solution, to need to lead to before entering Fenton reactor It crosses plus hydrogen peroxide plant adds hydrogen peroxide, it is 1-3 times of hydrogen peroxide concentration that ferrous ion concentration is controlled when adding;
The water outlet of Fenton reactor needs before entering iron cement sedimentation basin plus alkali adjusts PH8-9.
8. a kind of three embrane method seaweed processing waste water advanced treatment and reclamation devices, which is characterized in that including pretreatment unit, ultrafiltration membrane Processing unit, nanofiltration membrane treatment unit, reverse osmosis membrane processing unit and strong brine processing unit;
The pretreatment unit includes regulating reservoir and muddy water pumps, and upper inlet and the pre-treatment of the regulating reservoir carry out waterpipe It connects, the inlet communication that the side exit of the regulating reservoir is pumped with the muddy water, before the outlet of muddy water pump Processing system;
It is clear that the ultrafiltration membrane treatment unit includes ultrafiltration feed pump, ultrafiltration apparatus, ultrafiltration water producing tank, ultrafiltration cleaning case and ultrafiltration Wash pump;The import of the ultrafiltration feed pump is connected by pipeline with the side exit of the regulating reservoir, and the ultrafiltration is given By pipeline and the inlet communication of the ultrafiltration apparatus, a way outlet of the ultrafiltration apparatus passes through pipeline for the outlet of water pump With the inlet communication of ultrafiltration water producing tank;Another way passes through reflux line and the inlet communication of regulating reservoir;The ultrafiltration apparatus leads to Piping is connected with the ultrafiltration cleaning case and ultrafiltration cleaning pump circulation;
The nanofiltration membrane treatment unit includes nanofiltration feed pump, nanofiltration cartridge filter, nanofiltration high-pressure pump, nanofiltration device, receives Filter water producing tank, antisludging agent chemicals dosing plant and chemical cleaning case;The import of the nanofiltration feed pump is surpassed by pipeline and described The outlet of water producing tank is filtered, the outlet of the nanofiltration feed pump passes through the import of pipeline and the nanofiltration cartridge filter Connection, by the inlet communication of pipeline and the nanofiltration high-pressure pump, described receives for the outlet of the nanofiltration cartridge filter The outlet of high-pressure pump is filtered by pipeline and the inlet communication of the nanofiltration device, the outlet of the nanofiltration device passes through pipeline With the inlet communication of the nanofiltration water producing tank, the nanofiltration device is followed by pipeline and chemical cleaning case and chemical cleaning pump Ring connects;
The reverse osmosis membrane processing unit includes reverse osmosis feedwater pump, reverse osmosis cartridge filter, reverse osmosis high-pressure pump, reverse osmosis Saturating device and reverse osmosis produced water tank;The outlet that the import of the reverse osmosis feedwater pump passes through pipeline and the nanofiltration water producing tank Connection, the outlet of the reverse osmosis feedwater pump are described by pipeline and the inlet communication of the reverse osmosis cartridge filter Reverse osmosis cartridge filter the inlet communication that is pumped by pipeline with the reverse osmosis high-pressure of outlet, the reverse osmosis height By the inlet communication of pipeline and the reverse osmosis unit, the outlet of the reverse osmosis unit passes through pipeline for the outlet of press pump It is connected with the reverse osmosis produced water tank;
The strong brine processing unit includes oxidizing tower, Fenton reactor and iron cement sedimentation basin;The import of the oxidizing tower By pipeline and the nanofiltration device outlet, the outlet of the oxidizing tower connects with the import of the Fenton reactor Logical, the outlet of the Fenton reactor passes through pipeline and the inlet communication of the iron cement sedimentation basin.
9. device according to claim 8, which is characterized in that blender one is equipped in the regulating reservoir;Described Blender two is installed in ultrafiltration cleaning case;Blender three is installed in the chemical cleaning case;The Fenton reactor Blender four is inside installed.
10. device according to claim 8, which is characterized in that the outlet conduit connection scale inhibition of the nanofiltration feed pump Agent chemicals dosing plant;The oxidizing tower inlet pipeline connection means for feeding acid, oxidizing tower air inlet connection Aeration fan;Institute The inlet communication for the Fenton reactor stated adds ferrous sulfate device and plus hydrogen peroxide plant;The import of the iron cement sedimentation basin connects Logical plus alkali pipeline.
CN201810133482.6A 2018-02-09 2018-02-09 A kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods and device Pending CN108249643A (en)

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Application publication date: 20180706