CN106517611A - Reclaimed water reutilization method for circulating water system - Google Patents

Reclaimed water reutilization method for circulating water system Download PDF

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CN106517611A
CN106517611A CN201611261680.8A CN201611261680A CN106517611A CN 106517611 A CN106517611 A CN 106517611A CN 201611261680 A CN201611261680 A CN 201611261680A CN 106517611 A CN106517611 A CN 106517611A
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water
circulation
treated sewage
sewage reusing
circulation according
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薛方勤
赵雪锋
汪诚文
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention provides a reclaimed water reutilization method for a circulating water system. Raw water treated by the method is biochemical tail water of industrial enterprise wastewater stations or municipal sewage plants. The reclaimed water reutilization method comprises the steps of firstly, preparing reclaimed water through an electro-adsorption method; and then, supplementing reclaimed water into the circulating water system, and adding a phosphate-free corrosion inhibition scale inhibitor into the circulating water system, so as to inhibit corrosion and scaling. According to the reclaimed water reutilization method, the utilization amount of reclaimed water in circulating water can be effectively increased, the repeated utilization rate of water is increased, emission of wastewater is reduced, consumption of fresh water is reduced, the water resource is saved, the phosphorus content of circulating water blowdown water is greatly decreased, and the eutrophication degree of a water body is effectively reduced.

Description

A kind of Treated sewage reusing method for circulation
Technical field
The invention belongs to water-treatment technology field, and in particular to a kind of Treated sewage reusing method for circulation.
Background technology
Recirculated water is the important heat transferring medium of the industries such as electric power, petrochemical industry, oil refining, chemical industry, metallurgy, range of application and usage amount It is very big, circulation is entered as moisturizing using surface water (river) after simple coagulating treatment still mainly at present, This mode waste water resource.
Using industry and municipal wastewater prepare recycled water as circulation the less application of moisturizing.It is primarily present two The problem of individual aspect：
First is the low cost preparation method of middle water, i.e., how all types of industries waste water is carried out after proper treatment the water as in Add in circulation, high efficiency is adopted with the focus that the Treated sewage reusing technique of low cost is current research, bi-membrane method More, Electro Sorb is technique relatively new at present, has certain application, but Electro Sorb makes electrode using activated carbon at present, It is relatively costly.
Second is that middle water after treatment is compared with waste water, although improve quality, but for river, still So containing the more pollutant for causing fouling and corrosion, such as all kinds of soda acids, remaining organic matter, salt etc., such as pH<7 slant acidities, Or the COD of recycled watercrAnd BOD5Content is higher, CODcrCan reach 30-50mg/L, BOD5Can reach 10mg/L or so, micro- life Thing breeding comparatively fresh water is serious.After these have resulted in Treated sewage reusing, the corrosion of carbon steel or copper heat transmission equipment is susceptible to And fouling.Need to be solved by the way of addition corrosion inhibiting and descaling agent.In the use of corrosion inhibiting and descaling agent, at present, the country , still based on the phosphorous corrosion inhibiting and descaling agent of addition, the total amount of phosphorus discharge is huge, causes body eutrophication for circulation Key factor, especially in the Taihu Lake basin in national body eutrophication key monitoring area, problem is more projected.With technology Progressive, without phosphorus or low-phosphorus corrosion scale inhibition agent has the trend for gradually replacing phosphorus system medicament, for the reduction in Taihu Lake basin phosphorus With more very important effect.
Existing without phosphorus reagent combination major part is rested in the internationalization water treatment agent such as nail (unit of length) section, GE supplier hand, state The interior formula with independent intellectual property right is few；It is primarily due to domestic without phosphorus medicament corrosion inhibition not pass a test, simultaneously for The serious enterprise of variation water quality is not sufficiently stable.
Accordingly, it is desirable to provide a kind of new technical scheme, to solve the above problems.
The content of the invention
Supplement that ratio is low for the middle water that current circulation is present, the corrosion that middle water is entered after circulation and knot The high problem of discharge water phosphorus content caused by dirty outstanding problem, phosphorous corrosion-mitigation scale-inhibition medicament, this patent is using Electro Sorb as in The main process of Water circulation, and using without phosphorus corrosion-mitigation scale-inhibition medicament, it is as moisturizing and stable to reach recirculated water water using in The purpose of operation.
A kind of Treated sewage reusing method for circulation, including step：
1) trade effluent or municipal wastewater be after appropriate materialization and biochemical treatment, in being carried out using Electro Sorb method Prepared by water, specific flow process is：Water → pH regulation → filtration → water pump liftings → electro-adsorption demineralization.
The effect of Electro Sorb is to remove trade effluent or the salt in municipal wastewater, and its course of work is：Each Electro Sorb Have in module no less than 100 pairs of electric adsorption electrodes, the positive pole and negative pole of each pair electrode difference external rectification power, in starting work When, pending raw water enter each pair electrode between runner in, the anion and cation in water under the driving of DC electric field, Move to counter electrode respectively, anion is adsorbed in positive plate, and cation is adsorbed in negative plate, and raw water has been obtained only Change, the water after purification is collected as water is produced；The water inlet and delivery port of electric adsorption device is respectively mounted online conductivity measurement, By detect electrical conductivity of water and and water inlet relatively judging electrode whether adsorption saturation, when being close to adsorption saturation, will be positive and negative Electrode short circuit, negative ions will form concentrated water discharge with water inlet, and battery lead plate will recover adsorption capacity.
Wherein, the industrial wastewater that Electro Sorb can be entered be various industry waste water stations such as chemical industry, papermaking, printing and dyeing, metallurgy or Person's municipal sewage plant biochemical tail water, pollutant index include CODcr<100mg/L, electrical conductivity<6000 μ s/cm, should otherwise be fitted When pretreatment.
Electro Sorb adopts the plate electrode that based on activated carbon prepared by body.
The preparation method of electric adsorption electrode plate is：Electric adsorption electrode plate by activated carbon hybrid conductive agent, bonding agent, by spray It is prepared by the method for applying shaping, the mass fraction of activated carbon 80-86%, bonding agent and conductive agent mass ratio in 7-10% Between.
Wherein, activated carbon is prepared from by the excess sludge charing of municipal sewage plant.
Wherein, conductive agent be acetylene black, Super-P, one or more in Graphene.
Wherein, bonding agent be phenolic resin, polyvinylidene fluoride, one or more in polytetrafluoroethylene (PTFE).
Wherein, spraying is carried out using spray gun, and compressed gas are nitrogen, and pressure is not less than 0.8Mpa, nozzle diameter 4-8mm, Viscosity modifier is isopropanol.
In the preparation of Electro Sorb method, the condition of work of water is：
The spacing of each pair electrode both positive and negative polarity is 1-3mm, and electrode operation DC voltage is 0.8-1.4V, and hydraulic detention time is 20-60min, desalination rate 60-80% of water outlet, obtains water rate 70-80%.
2) Electro Sorb water outlet enters circulation as water is supplemented, in circulation after product pond is temporary Addition phosphate-free corrosion inhibition antisludging agent suppresses corrosion and fouling.
Wherein, the chemical feeding quantity of no-phosphate corrosion scale inhibition agent is 20-80mg/L.
Wherein, the product water of Electro Sorb enter circulation after, should ensure that circulation calcium hardness and total alkalinity it With less than 800mg/L.
Wherein, the composition of the phosphate-free corrosion inhibition antisludging agent includes the first polycarboxylic acid compound, the second polycarboxylic acid chemical combination Thing, slaine and tracer, wherein, main body medicament is by the first polycarboxylic acid compound, the second polycarboxylic acid compound, metal Salt mixing compounding is formed, and is the main component for realizing inhibition and scale effect, and the effect of tracer is mark aforementioned body medicament Concentration, realize indirectly the concentration monitor to aforementioned body medicament by monitoring concentration of tracer, and realize automatically controlling plus Medicine.
Wherein, the first polycarboxylic acid compound is that polyacrylic acid, poly-epoxy succinic acid, acrylic acid/hydroxypropyl acrylate are common One or more in polymers, acrylic/styrene sulfonic acid copolymer, acrylic acid/vinyl sulfonic acid copolymer etc., mass ratio is 40-60%；Second polycarboxylic acid compound is poly-aspartate, HPMA, in maleic anhydride/Styrene Sulfonic Acid Copolymer One or more, mass ratio is 40-60%.
Wherein, metallic salt is zinc chloride, zinc sulfate, zinc acetate, one or more in sodium gluconate, mass ratio Example is 4-8mg/L.
Wherein, tracer is anthracene disulfonic acid and/or anthracene disulfonic acid disodium salt, the quality of the concentration and main body medicament of tracer Concentration ratio is 1:2000-1：500.
Wherein, in preparation process, first by the first polycarboxylic acid compound and the second polycarboxylic acid compound Compounded, then the mixture of the two and the slaine are carried out into compounding and obtained main body medicament, finally added in main body medicament Enter tracer.
Wherein, after in this method, water adds to circulation, delayed using the phosphate-free corrosion inhibition antisludging agent agent of this method During erosion scale inhibition, it is not necessary to which acid adding adjusts the pH value of recirculated water.
Mass ratio in this method is the pharmacy quality ratio for not calculating thinned water, if dilution adds the first poly- carboxylic The method of acid compounds, the second polycarboxylic acid compound, slaine and tracer, still in the scope of the present invention.
After above step process, Electro Sorb water outlet enters circulation as water is supplemented, and circulation can be with According to the ratio stable operation of cycles of concentration 4-6, middle water has obtained reuse, significantly reduces the outer discharge capacity of waste water, in recirculated water Phosphorus content is also greatly reduced.
The no-phosphate corrosion scale inhibition agent of this method can be also used alone in the common circulation without Treated sewage reusing, And formula adjustment need not be carried out.
Description of the drawings
Flow charts of the Fig. 1 for the Treated sewage reusing method for circulation of the embodiment of the present invention.
Fig. 2 is the corrosion inhibition rate curve for evaluating corrosion inhibition of no-phosphate corrosion scale inhibition agent of the present invention.
Fig. 3 is the instantaneous dirtiness resistance curve for evaluating scale-inhibiting properties of no-phosphate corrosion scale inhibition agent of the present invention.
Specific embodiment
Detailed description below is used to illustrate the present invention, but should not be construed as limiting the invention.
In embodiment, if no special instructions, technological means used is this area conventional technique means.
The present invention provides a kind of Treated sewage reusing method for circulation, and the handled raw water of the method is from work Industry enterprise wastewater station or municipal sewage plant biochemical tail water, the method for the present invention is by trade effluent or municipal wastewater through Electro Sorb Middle water is made in process, and by Treated sewage reusing in circulation, so as to greatly reduce the use of surface water and groundwater, effectively Saving water resource.The phosphorus content of Wastewater Form Circulating Cooling Water is greatly reduced simultaneously, can effectively reduce the Eutrophic Extent of water body.
The present invention is comprised the following steps：
The first step, industrial enterprise's waste water station or municipal sewage plant biochemical tail water carry out middle water system using Electro Sorb method It is standby.
In this step, the pH value of the raw water is adjusted, and is filtered；Electro Sorb process is carried out to the water after filtration； Preferably, electric adsorption electrode is made using the activated carbon prepared by sludge.
Preferably, the industrial wastewater that can enter Electro Sorb is various industry and enterprises such as chemical industry, papermaking, printing and dyeing, metallurgy Waste water station or municipal sewage plant biochemical tail water, major pollutants index CODcr<100mg/L, electrical conductivity<6000 μ s/cm, otherwise Appropriate pretreatment should be carried out.
Preferably, in Electro Sorb process, Electro Sorb adopts the plate electrode that based on activated carbon prepared by body； The spacing of positive and negative electrode is 1-3mm, and electrode operation DC voltage is 0.8-1.4V, and hydraulic detention time is 20-60min, water outlet Desalination rate 60-80%, obtains water rate 70-80%.
Preferably, the adopted battery lead plate of Electro Sorb process is mixed with by activated carbon, conductive agent and bonding agent and is formed, Wherein, base material of the activated carbon for battery lead plate, its mass fraction are 80-86%；The mass fraction of bonding agent is 7-10%, for inciting somebody to action Dusty material bonding forming；Conductive agent is used for improving the electric conductivity of battery lead plate, and its mass fraction is 7-10%, above-mentioned battery lead plate by After above-mentioned three kinds of materials mixing, it is prepared from through the method for spray mo(u)lding.Battery lead plate long service life obtained in the method, than Surface area is big, and electrode activity is high, is conducive to the carrying out of Electro Sorb.
Preferably, the absorbent charcoal material is prepared using the excess sludge of municipal sewage plant.Wherein, prepare active raw material of wood-charcoal The activator that adopts of material for 40% polyethylene glycol, wherein, 800 DEG C of carbonization temperature, time 4h, nitrogen are shielding gas；Formed Absorbent charcoal material is mesoporous carbon, and average pore size is 20-40nm, and specific surface area is more than or equal to 600m2/g.Comprise the concrete steps that：
1) sludge of municipal sewage plant constant temperature drying 12-24h at 105 DEG C, then ground 16-20 mesh sieves；
2) coated and activated in the PEG400 solution of the sludge powder addition 40% after sieving, subsequently into Carbonized in retort, carbonization temperature is 800 DEG C, and time 4h, nitrogen are shielding gas；
3) carbonize powder standby through pickling, washing post-drying, obtain mesoporous carbon and prepare to make electric adsorption electrode, product is lived Property charcoal be mesoporous carbon, average pore size is 20-40nm, and specific surface area is not less than 600m2/g。
Angle of the method from resource, prepares active carbon powder using the excess sludge of municipal sewage plant and then makes Make electric adsorption electrode, low cost, effect are good, and there is provided a kind of reuse method of the sludge of municipal sewage plant.
Preferably, the conductive agent be acetylene black, Super-P, one or more in Graphene.The bonding agent For one or more in phenolic resin, polyvinylidene fluoride, polytetrafluoroethylene (PTFE).
Further, spray mo(u)lding is carried out using spray gun, wherein, compressed gas are nitrogen, and the outlet pressure of nitrogen is more than Equal to 0.8Mpa, the diameter 4-8mm of nozzle.The spray efficiency of spray gun is high, and electrode is uniformly reliable.
Second step, Electro Sorb is processed after the middle water that obtains be transported in circulation, and add in circulation Plus phosphate-free corrosion inhibition antisludging agent, to suppress corrosion and fouling.The Main Function mechanism of corrosion inhibiting and descaling agent is chelating, lower bound suppression and crystalline substance Lattice distortion is acted on.Original phosphorous formula is compounded using organic phosphine acid compounds mostly, and water body can be polluted.This method is adopted With phosphate-free corrosion inhibition antisludging agent, the Eutrophic Extent of water body is greatly reduced.
Preferably, the consumption of the phosphate-free corrosion inhibition antisludging agent is 20-80mg/L.
Preferably, Jing after the water of Electro Sorb process enters circulation, the calcium of the water in the circulation is hard Degree and total alkalinity sum are less than 800mg/L, to meet industrial production needs.
Preferably, the composition of the phosphate-free corrosion inhibition antisludging agent includes the first polycarboxylic acid compound, the second polycarboxylic acid Compound, slaine and tracer, wherein, main body medicament be by the first polycarboxylic acid compound, the second polycarboxylic acid compound, Slaine mixing compounding is formed, and is the main component for playing inhibition and scale effect, and the effect of tracer is mark aforementioned body The concentration of medicament, realizes the concentration mensuration to aforementioned body medicament indirectly by monitoring the concentration of tracer in corrosion inhibiting and descaling agent With Automatic Dosing control.
Wherein, the first polycarboxylic acid compound be polyacrylic acid, poly-epoxy succinic acid, acrylic acid-acrylic acid hydroxypropyl acrylate altogether One or more in polymers, acrylicstyrene sulfonic acid copolymer and AA-E sulfonic acid copolymer；Second polycarboxylic acids Class compound is poly-aspartate, HPMA, one or more in maleic anhydride-styrene sulfonic acid copolymer.
Preferably, the mass fraction of the first polycarboxylic acid compound be 40-60%, the matter of the second polycarboxylic acid compound Amount fraction is 40-60%.
Preferably, the slaine is zinc chloride, zinc sulfate, zinc acetate, one or more in sodium gluconate. Preferably, the mass ratio of slaine is 4-8mg/L.
Wherein, in preparation process, first by the first polycarboxylic acid compound and the second polycarboxylic acid compound Compounded, then the mixture of the two and the slaine are carried out into compounding and obtained main body medicament, finally added in main body medicament Enter tracer.
Wherein, the tracer is anthracene disulfonic acid and/or anthracene disulfonic acid disodium salt, concentration and the main body medicament of tracer The ratio of mass concentration is 1:2000-1:500.
Embodiment 1：
Certain ammonia enterprise, produces 300000 tons of ammonia of synthesis per year, and 520,000 tons of urea, existing synthesis procedure circulate water inventory 33000m3/ h, possesses water yield 9000m3, supplement water about 500m3/ h, cycles of concentration are about 4；It is former to adopt phosphorous formula, recirculated water to contain Phosphorus amount 4.5-6mg/L (in terms of phosphate radical)；Circulating cooling make-up water is using the river after coagulating kinetics；The waste water of enterprise itself Station adopts Wastewater by Biochemical Treatment, biochemical system treating capacity about 2000m3/ d, processed waste water CODcr<60mg/L, electrical conductivity 4000 μ s/cm, waste water is without reuse.
According to enforcement this method Treated sewage reusing shown in accompanying drawing 1.Work is prepared initially with the dirty mud as a raw material of municipal sewage plant Property carbon powder, the specific surface area of the active carbon powder is 782m2/g；Then according to activated carbon：Acetylene black：Polyvinylidene fluoride= 86:7:7 ratio mixed material, adopts isopropanol for viscosity modifier, and spraying method prepares electric adsorption electrode, using 4mm's Air spraying shaped electrode of the nozzle in 1.0Mpa.
The biochemical draining of waste water station is processed using Electro Sorb method, and condition of work is：Each pair electric adsorption electrode is positive and negative The spacing of pole is 3mm, and electrode operation DC voltage is 1.2V, and hydraulic detention time is 40min, 1600 μ s/cm of water outlet conductivity, Desalination rate 60%, water yield per day about 1400m3, obtain water rate 70%.
Recirculated water adopts without phosphorus medicament, and adding consistency is 60mg/L, and recirculated water cycles of concentration is constant, and Wastewater Form Circulating Cooling Water is not Phosphorous, corrosion of carbon steel speed is less than 0.01mm/a, blank sample corrosion rate 0.342mm/a, corrosion inhibition rate not plus during corrosion inhibiter 97.1% (Fig. 2)；Scale inhibition performance>80%, dirt deposition rate is less than 5mg/cm2, dirtiness resistance is 0.6 × 10-4m2K/W (Fig. 3) is full Dirtiness resistance ＜ 3.44 × 10 that sufficient GB50050-2007 Code for design of industrial recirculating cooling water treatment is proposed-4m2K/W and dirt Deposition ＜ 15mg/cm2Standard.
After above measure is implemented, Treated sewage reusing is to circulation and adopts phosphate-free corrosion inhibition antisludging agent, and inhibition and scale inhibition are equal The recirculated water design specification requirement of country can be met, year (calculating according to 330 days) 46.2 ten thousand tons of waste water can be reduced discharging, phosphorus is reduced discharging about 2.8t, water saving and emission reduction effect are notable.
Embodiment 2：
Certain Petrochemical Enterprises, ethene operation circulation water inventory 60000m3/ h, possesses water yield 28000m3, supplement water about 700m3/ H, cycles of concentration are about 5；It is former to adopt phosphorous formula, Wastewater Form Circulating Cooling Water phosphorus content 3-4mg/L (in terms of phosphate radical)；Enterprise itself Waste water station adopt Wastewater by Biochemical Treatment, biochemical system treating capacity about 4000m3/ d, processed waste water CODcr<80mg/L, electricity 3000 μ s/cm of conductance, waste water is without reuse.
In this method implementation process, initially with active carbon powder prepared by the dirty mud as a raw material of municipal sewage plant, the work Property carbon powder specific surface area be 638m2/g；Then according to activated carbon：Acetylene black：Polyvinylidene fluoride=80:10:10 ratio Example mixed material, adopts isopropanol for viscosity modifier, and spraying method prepares electric adsorption electrode, is existed using the nozzle of 6mm The air spraying shaped electrode of 0.8Mpa.
The biochemical draining of waste water station is processed using Electro Sorb method, and condition of work is：Each pair electric adsorption electrode is positive and negative The spacing of pole is 3mm, and electrode operation DC voltage is 1.2V, and hydraulic detention time is 60min, 900 μ s/cm of water outlet conductivity, Desalination rate 70%, water yield per day about 3200m3, obtain water rate 80%.
Recirculated water adopts without phosphorus medicament, and adding consistency is 40mg/L, and recirculated water cycles of concentration is constant, and Wastewater Form Circulating Cooling Water is not Phosphorous, corrosion of carbon steel speed is less than 0.06mm/a, blank sample corrosion rate 0.382mm/a, corrosion inhibition rate not plus during corrosion inhibiter 84.3%；Scale inhibition performance>80%, dirt deposition rate is less than 10mg/cm2, dirtiness resistance is 1.8 × 10-4m2K/W, meets Dirtiness resistance ＜ 3.44 × 10 that GB50050-2007 Code for design of industrial recirculating cooling water treatment is proposed-4m2K/W and dirt are heavy Product rate ＜ 15mg/cm2Standard.
After above measure is implemented, Treated sewage reusing is to circulation and adopts phosphate-free corrosion inhibition antisludging agent, and inhibition and scale inhibition are equal The recirculated water design specification requirement of country can be met, year (calculating according to 330 days) 105.6 ten thousand tons of waste water can be reduced discharging, phosphorus is reduced discharging about 4.2t, water saving and emission reduction effect are notable.
Embodiment 3：
Certain papermaking and combined heat and power enterprise, power plant cycle water inventory 50000m3/ h, possesses water yield 25000m3, supplement water about 900m3/ h, cycles of concentration are about 4；It is former to adopt phosphorous formula, Wastewater Form Circulating Cooling Water phosphorus content 3-4mg/L (in terms of phosphate radical)；Make Paper effluent part station adopts Wastewater by Biochemical Treatment, biochemical system treating capacity about 12000m3/ d, processed waste water CODcr<60mg/ L, 3000 μ s/cm of electrical conductivity, waste water is without reuse.
In this method implementation process, initially with the active carbon powder of the dirty mud as a raw material of municipal sewage plant, the activated carbon The specific surface area of powder is 706m2/g；Then according to activated carbon：Acetylene black：Polyvinylidene fluoride=85:8:7 ratio mixing Raw material, adopts isopropanol for viscosity modifier, spraying method prepare electric adsorption electrode, using 6mm nozzle 0.8Mpa pressure Power spray mo(u)lding electrode.
The biochemical draining of waste water station is processed using Electro Sorb method, and condition of work is：Each pair electric adsorption electrode is positive and negative The spacing of pole is 3mm, and electrode operation DC voltage is 1.2V, and hydraulic detention time is 60min, 600 μ s/cm of water outlet conductivity, Desalination rate 80%, water yield per day about 8400m3, obtain water rate 70%.
Recirculated water adopts without phosphorus medicament, and adding consistency is 80mg/L, and recirculated water cycles of concentration is constant, and Wastewater Form Circulating Cooling Water is not Phosphorous, corrosion of carbon steel speed is less than 0.045mm/a, blank sample corrosion rate 0.360mm/a, corrosion inhibition rate not plus during corrosion inhibiter 87.5%；Scale inhibition performance>80%, dirt deposition rate is less than 8mg/cm2, dirtiness resistance is 1.4 × 10-4m2K/W, meets GB50050- Dirtiness resistance ＜ 3.44 × 10 that 2007 Code for design of industrial recirculating cooling water treatment are proposed-4m2K/W and dirt deposition rate ＜ 15mg/cm2Standard.
After above measure is implemented, Treated sewage reusing is to circulation and adopts phosphate-free corrosion inhibition antisludging agent, and inhibition and scale inhibition are equal The recirculated water design specification requirement of country can be met, year (calculating according to 330 days) 277.2 ten thousand tons of waste water can be reduced discharging, phosphorus is reduced discharging about 11.1t, water saving and emission reduction effect are notable.
Embodiment above is only that the specific embodiment to the present invention is described, and not the scope of the present invention is entered Row is limited, and those skilled in the art can also do numerous modifications and variations on the basis of existing technology, set without departing from the present invention On the premise of meter spirit, various modifications and improvement that this area ordinary skill technical staff is made to technical scheme, All should fall in the protection domain of claims of the present invention determination.

Claims (12)

1. a kind of Treated sewage reusing method for circulation, the raw water handled by the method be industrial enterprise's waste water station or Municipal sewage plant biochemical tail water, comprises the following steps：
The first step, industrial enterprise's waste water station or municipal sewage plant biochemical tail water carry out middle water preparation using Electro Sorb method；
Second step, the middle water that Electro Sorb is produced are transported in circulation, and in circulation add no-phosphate corrosion Antisludging agent, to suppress corrosion and fouling.
2. a kind of Treated sewage reusing method for circulation according to claim 1, Electro Sorb method are adopted Battery lead plate is prepared from by activated carbon, conductive agent and bonding agent, wherein, the mass fraction of absorbent charcoal material is 80-86%, bonding The mass fraction of agent is 7-10%, and the mass fraction of conductive agent is 7-10%, after the battery lead plate is by the mixing of above-mentioned three kinds of materials, Using the method shaping of spraying.
3. a kind of Treated sewage reusing method for circulation according to claim 2, using the surplus of municipal sewage plant Remaining sludge prepares the activated carbon, wherein, prepare activator that activated carbon adopts for 40% PEG400, wherein, charing 800 DEG C of temperature, time 4h, nitrogen are shielding gas；The activated carbon of formation is mesoporous carbon, and average pore size is 20-40nm, specific surface area More than or equal to 600m2/g。
4. a kind of Treated sewage reusing method for circulation according to claim 2, the conductive agent be acetylene black, One or more in Super-P, Graphene, the bonding agent is phenolic resin, polyvinylidene fluoride, in polytetrafluoroethylene (PTFE) One or more.
5. a kind of Treated sewage reusing method for circulation according to claim 2, is sprayed into using spray gun Type, wherein, compressed gas are nitrogen, and the outlet pressure of nitrogen is more than or equal to 0.8Mpa, the diameter 4-8mm of nozzle.
6. a kind of Treated sewage reusing method for circulation according to claim 1, in the Electro Sorb method, The spacing of positive and negative electrode battery lead plate is 1-3mm, and electrode operation DC voltage is 0.8-1.4V, and hydraulic detention time is 20-60min, Desalination rate 60-80% of water outlet, obtains water rate 70-80%.
7. a kind of Treated sewage reusing method for circulation according to claim 1, industrial enterprise's waste water station Or the pollutant index of municipal sewage plant biochemical tail water includes CODcr<100mg/L, electrical conductivity<6000μs/cm.
8. a kind of Treated sewage reusing method for circulation according to claim 1, obtained in Jing Electro Sorb methods After middle water enters circulation, the calcium hardness and total alkalinity sum of the water in the circulation are less than 800mg/L.
9. a kind of Treated sewage reusing method for circulation according to claim 1, the phosphate-free corrosion inhibition antisludging agent Consumption be 20-80mg/L.
10. a kind of Treated sewage reusing method for circulation according to claim 1, the phosphate-free corrosion inhibition antisludging agent Composition include the first polycarboxylic acid compound, the second polycarboxylic acid compound, metallic salt and tracer, wherein, first gather Carboxylic acid compound is polyacrylic acid, poly-epoxy succinic acid, acrylic acid-acrylic acid hydroxypropyl ester copolymer, acrylicstyrene sulphur One or more in acid copolymer and AA-E sulfonic acid copolymer；Second polycarboxylic acid compound be poly-aspartate, One or more in HPMA, maleic anhydride-styrene sulfonic acid copolymer；In preparation process, first by described first Polycarboxylic acid compound and the second polycarboxylic acid compound are compounded, then the mixture of the two is multiple with the slaine With main body medicament is obtained, finally tracer is added in main body medicament.
A kind of 11. Treated sewage reusing methods for circulation according to claim 10, the slaine are chlorination One or more in zinc, zinc sulfate, zinc acetate, sodium gluconate.
A kind of 12. Treated sewage reusing methods for circulation according to claim 10, the tracer are anthracene two Sulfonic acid and/or anthracene disulfonic acid disodium salt, the ratio of the mass concentration of the concentration and main body medicament of tracer is 1:2000-1:500.
CN201611261680.8A 2016-12-30 2016-12-30 Reclaimed water reutilization method for circulating water system Pending CN106517611A (en)

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