CN103803716B - A kind of Treated sewage reusing is in the method for recirculating cooling water system - Google Patents
A kind of Treated sewage reusing is in the method for recirculating cooling water system Download PDFInfo
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- CN103803716B CN103803716B CN201210448302.6A CN201210448302A CN103803716B CN 103803716 B CN103803716 B CN 103803716B CN 201210448302 A CN201210448302 A CN 201210448302A CN 103803716 B CN103803716 B CN 103803716B
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- 239000000498 cooling water Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 68
- 230000003134 recirculating effect Effects 0.000 title claims abstract description 44
- 239000010865 sewage Substances 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 214
- 239000002455 scale inhibitor Substances 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 25
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 25
- 239000006185 dispersion Substances 0.000 claims abstract description 25
- 239000004571 lime Substances 0.000 claims abstract description 25
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 21
- 239000011574 phosphorus Substances 0.000 claims abstract description 21
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 14
- 230000007797 corrosion Effects 0.000 claims description 63
- 238000005260 corrosion Methods 0.000 claims description 63
- 230000000670 limiting effect Effects 0.000 claims description 28
- 239000003112 inhibitor Substances 0.000 claims description 21
- 238000011160 research Methods 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 11
- 229920001577 copolymer Polymers 0.000 claims description 11
- LVHBHZANLOWSRM-UHFFFAOYSA-N itaconic acid Chemical compound OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 11
- DCEMCPAKSGRHCN-UHFFFAOYSA-N oxirane-2,3-dicarboxylic acid Chemical compound OC(=O)C1OC1C(O)=O DCEMCPAKSGRHCN-UHFFFAOYSA-N 0.000 claims description 11
- 108010064470 polyaspartate Proteins 0.000 claims description 11
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 11
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 10
- 230000003301 hydrolyzing effect Effects 0.000 claims description 6
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 6
- 229910021538 borax Inorganic materials 0.000 claims description 5
- 239000004328 sodium tetraborate Substances 0.000 claims description 5
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 4
- 239000012964 benzotriazole Substances 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 229920001444 polymaleic acid Polymers 0.000 claims description 4
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- IKWYOJACIXUNIF-UHFFFAOYSA-N C(C=C)(=O)OC(C(C)O)C.CC=CC(=O)O Chemical compound C(C=C)(=O)OC(C(C)O)C.CC=CC(=O)O IKWYOJACIXUNIF-UHFFFAOYSA-N 0.000 claims description 2
- VWZUDZCTQDYEBU-UHFFFAOYSA-N CC(C(C)O)O.CC=CC(=O)O Chemical compound CC(C(C)O)O.CC=CC(=O)O VWZUDZCTQDYEBU-UHFFFAOYSA-N 0.000 claims description 2
- 150000008064 anhydrides Chemical group 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 52
- 238000011156 evaluation Methods 0.000 description 28
- 238000004088 simulation Methods 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000920 calcium hydroxide Substances 0.000 description 12
- 235000011116 calcium hydroxide Nutrition 0.000 description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical group [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- CZCSLHYZEQSUNV-UHFFFAOYSA-N [Na].OB(O)O Chemical compound [Na].OB(O)O CZCSLHYZEQSUNV-UHFFFAOYSA-N 0.000 description 9
- 239000002826 coolant Substances 0.000 description 9
- 239000013505 freshwater Substances 0.000 description 8
- -1 iron ion Chemical class 0.000 description 7
- DYUQAZSOFZSPHD-UHFFFAOYSA-N Phenylpropyl alcohol Natural products CCC(O)C1=CC=CC=C1 DYUQAZSOFZSPHD-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 230000005764 inhibitory process Effects 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical class [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- 235000012255 calcium oxide Nutrition 0.000 description 5
- 229920001519 homopolymer Polymers 0.000 description 5
- 230000000116 mitigating effect Effects 0.000 description 5
- GWZMWHWAWHPNHN-UHFFFAOYSA-N 2-hydroxypropyl prop-2-enoate Chemical compound CC(O)COC(=O)C=C GWZMWHWAWHPNHN-UHFFFAOYSA-N 0.000 description 4
- AENYAMPVQFAKHY-UHFFFAOYSA-N boric acid;potassium Chemical compound [K].OB(O)O AENYAMPVQFAKHY-UHFFFAOYSA-N 0.000 description 4
- 238000003889 chemical engineering Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 150000003852 triazoles Chemical class 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 239000009731 jinlong Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000003016 phosphoric acids Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- HUNGQTAXBUKZGQ-UHFFFAOYSA-N tripotassium borate hydrate Chemical class O.[K+].[K+].[K+].[O-]B([O-])[O-] HUNGQTAXBUKZGQ-UHFFFAOYSA-N 0.000 description 2
- LLQHSBBZNDXTIV-UHFFFAOYSA-N 6-[5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-4,5-dihydro-1,2-oxazol-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC1CC(=NO1)C1=CC2=C(NC(O2)=O)C=C1 LLQHSBBZNDXTIV-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- SYMAIKWDBCFRMP-UHFFFAOYSA-N C(C=C)(=O)O.C(C=C)(=O)OCCCO.C(C=C)(=O)O Chemical compound C(C=C)(=O)O.C(C=C)(=O)OCCCO.C(C=C)(=O)O SYMAIKWDBCFRMP-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000006174 pH buffer Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229940074404 sodium succinate Drugs 0.000 description 1
- ZDQYSKICYIVCPN-UHFFFAOYSA-L sodium succinate (anhydrous) Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O ZDQYSKICYIVCPN-UHFFFAOYSA-L 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a kind of Treated sewage reusing in the method for recirculating cooling water system, the method comprises the following steps: add lime in (1) in water and carry out solid-liquid separation after sofening treatment; (2) borate inhibiter is added in the middle water obtained after step (1) solid-liquid separation; (3) the middle water after adding borate inhibiter in step (2) is joined in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water; (4) polymeric scale inhibitor dispersion agent is added in the recirculated cooling water after adding middle water in step (3).Method provided by the invention, the safety of water conveying in can ensureing, reduce the difficulty of circulating water cooling treatment, and whole process avoids the introducing of phosphorus.
Description
Technical field
The present invention relates to a kind of Treated sewage reusing in the method for recirculating cooling water system.
Background technology
Current water resources worsening shortages, in order to realize the sustainable use of water resources, middle water more and more receives publicity as a kind of second water source that is reliable, that can reuse.Middle water mainly refers to the water quality standard that municipal effluent or sanitary sewage reach certain after treatment, within the specific limits reusable undrinkable water, and its water-quality guideline, lower than drinking water standard, allows higher than sewage the emission standard entering surface water body.Treated sewage reusing has been implemented for a long time abroad, and reuse is on a grand scale, and shows obvious economic benefit.
China's industrial water consumption is huge, wherein maximum with circulating cooling water consumption proportion, and recirculating cooling water system is lower slightly compared with other production processes to the water quality requirement of its make up water.If by Treated sewage reusing in industrial circulating cooling water, not only a large amount of fresh waters can be saved, and effectively can alleviate the imbalance between supply and demand of town water.But also there are some problems in recirculated cooling water in its course of conveying and follow-up recirculated cooling water operational process in Treated sewage reusing.
First, middle water and fresh water have certain gap in water quality, and therefore in course of conveying, middle water is also serious than fresh water to corrosive pipeline.Corrosive pipeline not only can cause the thinning and perforation of tube wall to leak, and shortens pipeline work-ing life, reduces pipeline water delivery ability and increase water delivery energy consumption etc., and can cause middle water water degradation, increase its enter recirculated water after use difficulty.At present, domestic centering water course of conveying not yet takes effective safeguard procedures.
Secondly, in recirculating cooling water system, applying maximum treatment processs is now chemical method, namely suppresses the corrosion of system by adding inhibiter, and domestic most widely used in circulating water cooling treatment, the most successful inhibiter is containing phosphor corrosion inhibitor.Because well-known phosphoric acid salt is to the harm of environment, the use containing phosphor corrosion inhibitor is restricted gradually, and circulating water cooling treatment is " without phosphatization " urgently.
CN1887749A discloses a kind of environmental protection composite scale inhibiter and application thereof.By weight percentage, this anti-incrustation corrosion inhibitor comprises the soda ash of the Sodium salts humic acids of 40-45%, the polyepoxy sodium succinate of 25-30%, the borax of 20-25% and 10-15%.The present invention by organic and inorganic corrosion inhibiting and descaling agent, dispersion sequestrant, auxiliary is composite forms, Formulation Ingredients has obvious synergy, good with sterilant compatibility, to iron ion and halogen better tolerance.But this invention does not relate to the process of centering water.
CN101125713A discloses a kind of liquid-type inhibiter being exclusively used in closed circulation water system, and relates to its application and preparation method.This inhibiter contains following component and weight percent content: borax 5.5-10%, caustic alkali 1.0-3.0%, silicate 3.5-4.2%, nitrite 6.4-12.4%, 2-mercaptobenzothiazole 0.1-1.0%, remaining as water.
Although at present both at home and abroad investigator once carried out research to boratory corrosion inhibition, also part document and patent, borate was made up of together with other medicaments the corrosion inhibitor formula of recirculating cooling water system.But the corrosion inhibitor formula of the containing borate reported in current document all exists different from the formula of the inhibiter that the present invention adopts.In addition, water in lime treatment does not all process with borate by current technology again, the etching problem of pipeline in water course of conveying in being used for alleviating, technology is not more had to introduce in recirculating cooling water system by adopting water in after lime, borate process,, pH value meta-alkalescence on the low side by water hardness in after lime treatment, in addition boratory corrosion inhibition and the shock absorption to pH value thereof, exempts containing the application of phosphor corrosion inhibitor in the recirculating cooling water system of middle water as recirculated cooling water moisturizing.
Summary of the invention
During for current Treated sewage reusing in recirculating cooling water system, in existence, water adds the problem containing phosphor corrosion inhibitor to needing in the etching problem of pipeline and recirculated cooling water in course of conveying, the object of this invention is to provide a kind of effectively can suppress centering water transport pipe and recirculating cooling water system burn into and need not containing the Treated sewage reusing of phosphor corrosion inhibitor in the method for recirculated cooling water.
The present inventor finds through research, and adopt the middle water of lime soften for sewage in alkalescence, then join in lime soften for sewage in water by borate, borate can form pH buffer system in water, and higher pH value is conducive to inhibition.Simultaneously, in water, add borate be conducive to the absorption of the metallic surface of oxygen on the equipment and pipeline of recirculating cooling water system and promote the passivation of metal, thereafter borate can be adsorbed on the oxide film of metallic surface, thus the anodic reaction process of retardance metal electrode.Therefore method provided by the invention can suppress the etching problem of the middle water line of pipes existed in current technology effectively.
The invention provides a kind of Treated sewage reusing in the method for recirculating cooling water system, the method comprises the following steps:
(1) solid-liquid separation after lime soften for sewage process is added in water;
(2) borate inhibiter is added in the middle water obtained after step (1) solid-liquid separation;
(3) the middle water after adding borate inhibiter in step (2) is joined in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water;
(4) polymeric scale inhibitor dispersion agent is added in the recirculated cooling water after adding middle water in step (3).
Adopt Treated sewage reusing provided by the invention in the method for recirculated cooling water, the safety of water conveying in can ensureing on the one hand; On the other hand, after middle water enters recirculating cooling water system, there is etching problem hardly, and fouling risk is lower, reduces the difficulty of circulating water cooling treatment.Generally, therefrom water is transported to the whole process that recirculating cooling water system runs, and can realize " without phosphatization " operation, thus significantly reduces the risk that recirculating cooling water system blowdown produces secondary pollution.
Embodiment
The invention provides a kind of Treated sewage reusing in the method for recirculated cooling water, wherein, the method comprises the following steps:
(1) solid-liquid separation after lime soften for sewage process is added in water;
(2) borate inhibiter is added in the middle water obtained after step (1) solid-liquid separation;
(3) the middle water after adding borate inhibiter in step (2) is joined in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water;
(4) polymeric scale inhibitor dispersion agent is added in the recirculated cooling water after adding middle water in step (3).
According to the present invention, " middle water " refers to the sanitary sewage of discharge, trade effluent to reclaim, and the water that can recycle after treatment, also claims reuse water.Water after the process of municipal effluent treated facility deep purifying (comprise sewage work carries out the water after deepening process and building again through second-stage treatment, the bath water, vegetable washing water etc. of living community concentrate water after treatment) is referred to as " middle water ".Its water quality is between tap water (upper water) and enter between sewage in pipeline (lower water), and also therefore named is " middle water ".It mainly refers to the water quality standard that municipal effluent or sanitary sewage reach certain after treatment, can reusable undrinkable water within the specific limits.The COD value of described middle water, generally at below 100mg/L, is generally 15-100mg/L.According to reclaimed water reuse in industrial cycle cooling water standard, middle water COD of the present invention answers≤60mg/L.
Described in the present invention, " Limiting Viscosity " is also called intrinsic viscosity, the size of the polymer referring to unit mass shared volume in the solution.In the present invention, Limiting Viscosity adopts GB/T22593-2008 water conditioner Limiting Viscosity measuring method to measure.
According to method of the present invention, step (1), the lime that the present invention adds in middle water is unslaked lime or white lime.Directly can add solid when adding, also can first be made into milk of lime and add again.The dosage of lime can according in water hardness and processing requirements regulate, when adopting in after lime treatment water hardness still high, research of non-phosphorus scale inhibitor can be added after Zhong Shui enters recirculating cooling water system.Because the phosphatic content in middle water is lower, usually, after adopting lime treatment, phosphoric acid salt can all be removed.
According to method of the present invention, the present invention does not have particular requirement to the solid-liquid separating method in step (1), can for prior art is for the various solid-liquid separating methods of water treatment.
According to method of the present invention, the present invention does not have special restriction to the kind of described borate inhibiter and consumption, can be all water-soluble borates, also comprising the similar substance utilizing certain blending means to prepare, such as, can also be the mixture of boric acid aqueous solution and aqueous sodium hydroxide solution.Preferably, described borate inhibiter is anhydride and/or the hydrate of Sodium Tetraborate and/or potassium borate.With water middle often liter described for benchmark, in boron, described boratory add-on is 20-200mg/L, further preferred 40-180mg/L.
According to method of the present invention, the present invention does not have special restriction to the kind of described polymeric scale inhibitor dispersion agent and consumption, the specific examples of described polymeric scale inhibitor dispersion agent can be, but not limited to as poly-(methyl) vinylformic acid, polymaleic acid, hydrolytic polymaleic anhydride, poly-methylene-succinic acid, (methyl) vinylformic acid-itaconic acid copolymer, (methyl) vinylformic acid-(methyl) Propylene glycol monoacrylate multipolymer, (methyl) vinylformic acid-2-acrylamide-2-methyl-propane sulfonic acid multipolymer and (methyl) vinylformic acid-(methyl) Propylene glycol monoacrylate-2-acrylamide-2-methyl-propane sulfonic acid multipolymer and composition thereof.With recirculated water often liter described for benchmark, the add-on of described polymeric scale inhibitor dispersion agent is 5-20mg/L, preferred 8-15mg/L.
According to the present invention, be in the embodiment of copolymer anti-scale disperser at described polymeric scale inhibitor dispersion agent, the present invention does not specially require for the kind of monomer various in described copolymer anti-scale disperser and weight ratio thereof, the various copolymer anti-scale dispersers that described copolymer anti-scale disperser can be commonly used for this area, as long as this multipolymer can play the effect of scale inhibition and antiscale.Preferably, during control 30 DEG C, the Limiting Viscosity of described copolymer anti-scale disperser is 0.065-0.095dl/g; Be in the embodiment of homopolymer dirt dispersion agent at described polymeric scale inhibitor dispersion agent, described homopolymer dirt dispersion agent can be the conventional various homopolymer dirt dispersion agents in this area, as long as this homopolymer can play the effect of scale inhibition and antiscale.Preferably, during control 30 DEG C, the Limiting Viscosity of described homopolymer dirt dispersion agent is 0.065-0.095dl/g.
Polymeric scale inhibitor dispersion agent of the present invention all can be commercially available, and also can laboratory synthesis obtain as required.The method of synthesis is the common practise of those skilled in the art, does not repeat them here.
According to method of the present invention, in order to suppress further recirculated cooling water the fouling of recirculating cooling water system and to system in the corrosion of copper equipment, the method is also included in step (4) and adds research of non-phosphorus scale inhibitor and/or copper material corrosion inhibitor.In the case, the order of adding of the present invention to the polymeric scale inhibitor dispersion agent in step (4) and research of non-phosphorus scale inhibitor and/or copper material corrosion inhibitor does not have strict restriction, polymeric scale inhibitor dispersion agent and research of non-phosphorus scale inhibitor and/or copper material corrosion inhibitor can be dropped into simultaneously, also can first addition polymerization compound dirt dispersion agent, then add research of non-phosphorus scale inhibitor and/or copper material corrosion inhibitor.Preferably, the timed interval added between polymeric scale inhibitor dispersion agent and research of non-phosphorus scale inhibitor and/or copper material corrosion inhibitor is preferably not more than 2-30 minute.
According to method of the present invention, the present invention does not have special restriction to the kind of described research of non-phosphorus scale inhibitor and consumption, and preferably, described research of non-phosphorus scale inhibitor is selected from poly-epoxy succinic acid and/or poly aspartic acid; With recirculated cooling water often liter described for benchmark, the add-on of described research of non-phosphorus scale inhibitor is 1-12mg, is preferably 2-10mg.The present invention has no particular limits for the molecular weight of described poly aspartic acid and poly-epoxy succinic acid, it can be the molecular weight that this area is commonly used, under preferable case, when 30 DEG C, the Limiting Viscosity of described poly aspartic acid is 0.055-0.090dl/g, and when 30 DEG C, the Limiting Viscosity of described poly-epoxy succinic acid is 0.030-0.060dl/g.
According to method of the present invention, the present invention does not have special restriction to the kind of described copper material corrosion inhibitor and consumption, and preferably, described copper material corrosion inhibitor is selected from least one in benzotriazole, methyl benzotriazazole and mercaptobenzothiazole; With recirculated cooling water often liter described for benchmark, the add-on of described copper material corrosion inhibitor is 0.25-4.5mg/L, more preferably 0.5-4mg/L.
To be further described in detail the present invention by specific embodiment below.
The present invention adopts GB/T22593-2008 water conditioner Limiting Viscosity measuring method to measure the Limiting Viscosity of research of non-phosphorus scale inhibitor and polymeric scale inhibitor dispersion agent.
The present invention carries out corrosion mitigating effect evaluation test with reference to National Standard of the People's Republic of China GB/T18175-2000 " mensuration-rotary hanging plate method of water conditioner corrosion inhibition " to following embodiment and comparative example.Intermediate water pipeline is being carried in corrosion mitigating effect evaluation test: test temperature is 30 DEG C; Test piece rotating speed is 120rpm; Test period is 72h; Test piece material is 20# carbon steel.
To in the evaluation test of recirculating cooling water system corrosion mitigating effect: the test piece of 20# carbon steel or H62 brass are fixed on lacing film instrument, put into the test water of embodiment or comparative example, steady temperature 45 ± 1 DEG C, rotating speed 75rpm is kept to rotate 72h, the weight of test piece before and after record test, calculates average corrosion rate.
Average corrosion rate calculation formula is:
C: computational constant, during with mm/a (millimeter/year) for unit, C=8.76 × 10
7
△ W: the corrosion weight loss (g) of test specimen; A: the area (cm of test specimen
2); T: corrosion test time (h)
ρ: the density (kg/m of material for test
3)
Test with in water and fresh water water quality in table 1.
Table 1 test water water quality
| Project | Detection method | Middle water 1 | Middle water 2 | Middle water 3 | Fresh water |
| COD/(mg／L) | GB11914-1989 | 11 | 23 | 18 | 0 |
| Ca 2+/(mg／L) | GB/T6910-1986 | 87.9 | 156.2. | 246.6 | 188.5 |
| Total hardness/(mg/L) | GB/T15452-2009 | 102.3 | 188.4 | 315.5 | 223.2 |
| Total alkalinity/(mg/L) | GB/T15451-2006 | 93.4 | 145.5 | 241.7 | 217.4 |
| Cl -/(mg／L) | GB/T6905.3-1986 | 23.3 | 35.4 | 77.8 | 31.5 |
| SO4 2-/(mg／L) | Q/SH3155.S08.008-2006 | 32.5 | 28.7 | 92.1 | 58.7 |
| Specific conductivity/(μ S/cm) | GB/T6908-1986 | 298 | 592 | 1115 | 874 |
| pH | GB/T6904.1-1986 | 7.54 | 7.67 | 7.84 | 7.64 |
| Total phosphorus/(mg/L) | HG／T3540-1990 | 0.68 | 1.27 | 1.41 | 0 |
| Positive phosphorus/(mg/L) | HG／T3540-1990 | 0.64 | 1.23 | 1.38 | 0 |
Note: Ca
2+, total alkalinity, total hardness is all with CaCO
3meter; Total phosphorus, positive phosphorus are all with PO
4 3-meter.
In following examples, the concentration of all water treatment agents all refers to effective concentration, the concentration of the effective constituent namely in often kind of water treatment agent.
Embodiment 1
With water in 1# for test water, add unslaked lime wherein, in water in often liter, unslaked lime is (with CaCO
3meter) input amount be 40mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add anhydrous boric acid sodium, make softening after middle water in the concentration of anhydrous boric acid sodium (in B) be 140mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 3 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add polymaleic acid (Nanjing Chemical Engineering College's Changzhou Wujin water quality stabilizer factory, Limiting Viscosity when 30 DEG C is 0.077dL/g) and benzotriazole to simulation recirculated cooling water in, make the concentration of polymaleic acid and benzotriazole be respectively 8mg/L and 2mg/L, carry out the test of recirculating cooling water system corrosion evaluation with this.Test-results is in table 2.
Embodiment 2
With water in 2# for test water, add white lime wherein, in water in often liter, the white lime in middle water is (with CaCO
3meter) input amount be 110mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add ten hydrated sodium borates, make softening after middle water in the concentration of ten hydrated sodium borates (in B) be 70mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 4.5 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add poly-epoxy succinic acid (Changzhou whole world Chemical Co., Ltd., trade mark LN-110, Limiting Viscosity when 30 DEG C is 0.030dL/g) and polyacrylic acid (Changzhou whole world Chemical Co., Ltd., trade mark LN-107, Limiting Viscosity when 30 DEG C is 0.068dL/g) in the recirculated cooling water of simulation, make poly-epoxy succinic acid and polyacrylic concentration be respectively 6mg/L and 15mg/L, carry out the test of recirculating cooling water system corrosion evaluation with this.Test-results is in table 2.
Embodiment 3
With water in 3# for test water, add white lime wherein, in water in often liter, the white lime in middle water is (with CaCO
3meter) input amount be 220mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add anhydrous boric acid potassium, make softening after middle water in the concentration of anhydrous boric acid potassium (in B) be 120mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 2.5 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add acrylic acid-acrylic acid hydroxypropyl acrylate-2-acrylamide-2-methyl propane sulfonic multipolymer (Changzhou whole world Chemical Co., Ltd., trade mark LN-104B, acrylic monomer units in multipolymer, the weight ratio of Propylene glycol monoacrylate monomeric unit and 2-acrylamide-2-methyl propane sulfonic monomeric unit is 4:1:1, Limiting Viscosity when 30 DEG C is 0.083dL/g) and methyl phenylpropyl alcohol triazole to simulation recirculated cooling water in, the concentration of vinylformic acid/Propylene glycol monoacrylate/2-acrylamide-2-methyl propane sulfonic multipolymer and methyl phenylpropyl alcohol triazole is made to be respectively 12mg/L and 1mg/L, the test of recirculating cooling water system corrosion evaluation is carried out with this.Test-results is in table 2.
Embodiment 4
With water in 1# for test water, add white lime wherein, in water in often liter, the white lime in middle water is (with CaCO
3meter) input amount be 20mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add five hydrated sodium borates, make softening after middle water in the concentration of five hydrated sodium borates (in B) be 180mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 5 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add poly aspartic acid (Jin Long Chemical Co., Ltd. of Heng Tai county of Shandong Province, Limiting Viscosity when 30 DEG C is 0.055dL/g) and vinylformic acid-itaconic acid copolymer (Nanjing Chemical Engineering College's Changzhou Wujin water quality stabilizer factory, in multipolymer, the weight ratio of acrylic monomer units and methylene-succinic acid monomeric unit is 3:1, Limiting Viscosity when 30 DEG C is 0.073dL/g) in the recirculated cooling water of simulation, make the concentration of poly aspartic acid and vinylformic acid/itaconic acid copolymer be respectively 4mg/L and 20mg/L, carry out the test of recirculating cooling water system corrosion evaluation with this.Test-results is in table 2.
Embodiment 5
With water in 2# for test water, add milk of lime wherein, in water in often liter, the milk of lime in middle water is (with CaCO
3meter) input amount be 70mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add anhydrous boric acid sodium, make softening after middle water in the concentration of anhydrous boric acid sodium (in B) be 160mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 3 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add poly-epoxy succinic acid (Changzhou whole world Chemical Co., Ltd., trade mark LN-110, Limiting Viscosity when 30 DEG C is 0.060dL/g), acrylic acid-acrylic acid hydroxypropyl acrylate multipolymer (Changzhou whole world Chemical Co., Ltd., trade mark LN-108, in multipolymer, the weight ratio of acrylic monomer units and Propylene glycol monoacrylate monomeric unit is 4:1, Limiting Viscosity when 30 DEG C is 0.077dL/g) and mercaptobenzothiazole to simulation recirculated cooling water in, make poly-epoxy succinic acid, the concentration of vinylformic acid/Propylene glycol monoacrylate multipolymer and mercaptobenzothiazole is respectively 8mg/L, 17mg/L and 3mg/L, the test of recirculating cooling water system corrosion evaluation is carried out with this.Test-results is in table 2.
Embodiment 6
With water in 3# for test water, add unslaked lime wherein, in water in often liter, the unslaked lime in middle water is (with CaCO
3meter) input amount be 200mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add four hydrate potassium borates, make softening after middle water in the concentration of four hydrate potassium borates (in B) be 40mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 2.5 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add poly-methylene-succinic acid (Nanjing Chemical Engineering College's Changzhou Wujin water quality stabilizer factory, Limiting Viscosity when 30 DEG C is 0.071dL/g) and methyl phenylpropyl alcohol triazole to simulation recirculated cooling water in, make the concentration of poly-methylene-succinic acid and methyl phenylpropyl alcohol triazole be respectively 5mg/L and 0.5mg/L, carry out the test of recirculating cooling water system corrosion evaluation with this.Test-results is in table 2.
Embodiment 7
With water in 2# for test water, add milk of lime wherein, in water in often liter, milk of lime is (with CaCO
3meter) input amount be 90mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add ten hydrated sodium borates, make softening after middle water in the concentration of ten hydrated sodium borates (in B) be 60mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 4 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add poly aspartic acid (Jin Long Chemical Co., Ltd. of Heng Tai county of Shandong Province, Limiting Viscosity when 30 DEG C is 0.090dL/g) and hydrolytic polymaleic anhydride (Changzhou whole world Chemical Co., Ltd., trade mark LN-106, Limiting Viscosity when 30 DEG C is 0.082dL/g) in the recirculated cooling water of simulation, make the concentration of poly aspartic acid and hydrolytic polymaleic anhydride be respectively 2mg/L and 10mg/L, carry out the test of recirculating cooling water system corrosion evaluation with this.Test-results is in table 2.
Embodiment 8
With water in 3# for test water, add milk of lime wherein, in water in often liter, milk of lime is (with CaCO
3meter) input amount be 90mg/L, through solid-liquid separation obtain softening after in water.Anhydrous boric acid sodium and anhydrous boric acid potassium is added in water in after softening, make the concentration of the anhydrous boric acid sodium (in B) in the middle water after softening and anhydrous boric acid potassium (in B) be respectively 50mg/L and 30mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 2 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add poly-epoxy succinic acid (Changzhou whole world Chemical Co., Ltd., trade mark LN-110, Limiting Viscosity when 30 DEG C is 0.053dL/g), poly aspartic acid (Jin Long Chemical Co., Ltd. of Heng Tai county of Shandong Province, Limiting Viscosity when 30 DEG C is 0.068dL/g) and vinylformic acid/2-acrylamide-2-methyl propane sulfonic multipolymer (the Changjiang river, Shandong Chemical Co., Ltd., in multipolymer, the weight ratio of acrylic monomer units and 2-acrylamide-2-methyl propane sulfonic monomeric unit is 4:1, Limiting Viscosity when 30 DEG C is 0.075dL/g) in the recirculated cooling water of simulation, make poly-epoxy succinic acid, the concentration of poly aspartic acid and vinylformic acid/2-acrylamide-2-methyl propane sulfonic multipolymer is respectively 5mg/L, 5mg/L and 15mg/L, the test of recirculating cooling water system corrosion evaluation is carried out with this.Test-results is in table 2.
Embodiment 9
With water in 1# for test water, add milk of lime wherein, in water in often liter, milk of lime is (with CaCO
3meter) input amount be 30mg/L, through solid-liquid separation obtain softening after in water.In water in after softening, add boric acid and sodium hydroxide, make softening after middle water in the concentration of Sodium Tetraborate (in B) be 100mg/L, carry out the test of intermediate water pipeline conveying corrosion evaluation with this.By concentrated for above-mentioned middle water 3.5 times, the middle water adding aforementioned inhibiter in simulated production scene joins the state in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water, obtain simulation loop water coolant.Add hydrolytic polymaleic anhydride (Changzhou whole world Chemical Co., Ltd., trade mark LN-106, Limiting Viscosity when 30 DEG C is 0.082dL/g), vinylformic acid/itaconic acid copolymer (Nanjing Chemical Engineering College's Changzhou Wujin water quality stabilizer factory, in multipolymer, the weight ratio of acrylic monomer units and methylene-succinic acid monomeric unit is 3:1, Limiting Viscosity when 30 DEG C is 0.073dL/g) and phenylpropyl alcohol triazole to simulation recirculated cooling water in, make hydrolytic polymaleic anhydride, the concentration of vinylformic acid/itaconic acid copolymer and phenylpropyl alcohol triazole is respectively 6mg/L, 6mg/L and 4mg/L, the test of recirculating cooling water system corrosion evaluation is carried out with this.Test-results is in table 2.
Comparative example 1
Do not carrying out lime soften for sewage process, under also not adding boratory condition, carrying out the test of Cemented filling corrosion evaluation with middle water 1, the results are shown in Table 2.
Comparative example 2
Do not carrying out lime soften for sewage process, under also not adding boratory condition, carrying out the test of Cemented filling corrosion evaluation with middle water 2, the results are shown in Table 2.
Comparative example 3
Do not carrying out lime soften for sewage process, under also not adding boratory condition, carrying out the test of Cemented filling corrosion evaluation with middle water 3, the results are shown in Table 2.
Comparative example 4
Do not carrying out lime soften for sewage process, under also not adding boratory condition, carrying out the test of Cemented filling corrosion evaluation with fresh water, the results are shown in Table 2.
Comparative example 5
With water in 1# for test water, add milk of lime wherein, make milk of lime in middle water (with CaCO
3meter) concentration be 40mg/L, carry out the test of Cemented filling corrosion evaluation with water in after solid-liquid separation, the results are shown in Table 2.
Comparative example 6
With water in 1# for test water, add anhydrous boric acid sodium wherein, the concentration making the anhydrous boric acid sodium (in B) in middle water is 180mg/L, carries out the test of Cemented filling corrosion evaluation, the results are shown in Table 2 with this.
Table 2 corrosion evaluation test-results
Table 2 result shows, in comparative example 1-3, in three kinds of different qualities, the erosion rate of water will apparently higher than the erosion rate of fresh water in comparative example 4.Due to do not add treatment agent comparative example in the corrosion of carbon steel speed of water be greater than 0.4mm/a, the requirement entering recirculating cooling water system cannot be met.By method provided by the invention, embodiment 1-9 centering water has carried out lime soften for sewage process, and has added borate inhibiter, the erosion rate of water in significantly reducing, illustrate method provided by the invention can effectively alleviate in water to the corrosion of its transport pipe.Meanwhile, effect of the present invention also will significantly be better than in comparative example 4 taking fresh water as the Corrosion results of subjects.Comparative example 5-6 is the test-results that in 1#, water individually adds milk of lime or anhydrous boric acid sodium, add separately both can finding out and all there is certain corrosion mitigating effect, erosion rate can be reduced to fresh water erosion rate quite even lower, but also there is a big difference with the corrosion mitigating effect of embodiment.
In addition, table 2 result also shows, according to water in the method for the invention process as a supplement Water circulation after recirculating cooling water system, only need add the polymkeric substance and optional research of non-phosphorus scale inhibitor and copper inhibitor with antiscaling dispersion effect, system can keep lower erosion rate, meets the requirement of circulating water cooling treatment completely.By method of the present invention, ensure the safety of middle water conveying, reduce the difficulty of circulating water cooling treatment, and whole process has avoided the introducing of phosphorus.
Claims (14)
1. Treated sewage reusing is in a method for recirculating cooling water system, it is characterized in that, the method comprises the following steps:
(1) solid-liquid separation after lime soften for sewage process is only added in water;
(2) borate inhibiter is added in the middle water obtained after by step (1) solid-liquid separation;
(3) the middle water after adding borate inhibiter in step (2) is joined in the recirculated cooling water in recirculating cooling water system as the moisturizing of recirculated cooling water;
(4) polymeric scale inhibitor dispersion agent is added in the recirculated cooling water after adding middle water in step (3).
2. method according to claim 1, wherein, described borate is selected from anhydride and/or the hydrate of Sodium Tetraborate and/or potassium borate.
3. method according to claim 1 and 2, wherein, with water middle often liter described for benchmark, in boron, described boratory add-on is 20-200mg/L.
4. method according to claim 3, wherein, described boratory add-on is 40-180mg/L.
5. method according to claim 1, wherein, described polymeric scale inhibitor dispersion agent is selected from least one in poly-(methyl) vinylformic acid, polymaleic acid, hydrolytic polymaleic anhydride, poly-methylene-succinic acid, (methyl) vinylformic acid-itaconic acid copolymer, (methyl) vinylformic acid-(methyl) Propylene glycol monoacrylate multipolymer, (methyl) vinylformic acid-2-acrylamide-2-methyl-propane sulfonic acid multipolymer and (methyl) vinylformic acid-(methyl) Propylene glycol monoacrylate-2-acrylamide-2-methyl-propane sulfonic acid multipolymer; With recirculated water often liter described for benchmark, the add-on of described polymeric scale inhibitor dispersion agent is 5-20mg/L.
6. method according to claim 5, wherein, the add-on of described polymeric scale inhibitor dispersion agent is 8-15mg/L.
7. method according to claim 5, wherein, Limiting Viscosity during described polymeric scale inhibitor dispersion agent 30 DEG C is 0.065-0.095dl/g.
8. method according to claim 1, wherein, the method is also included in step (4) and adds research of non-phosphorus scale inhibitor and/or copper material corrosion inhibitor.
9. method according to claim 6, wherein, described research of non-phosphorus scale inhibitor is selected from poly-epoxy succinic acid and/or poly aspartic acid.
10. method according to claim 8 or claim 9, wherein, with recirculated cooling water often liter described for benchmark, the add-on of described research of non-phosphorus scale inhibitor is 1-12mg.
11. methods according to claim 10, wherein, the add-on of described research of non-phosphorus scale inhibitor is for being 2-10mg.
12. methods according to claim 9, wherein, Limiting Viscosity during described poly aspartic acid 30 DEG C is 0.055-0.090dl/g, and Limiting Viscosity during described poly-epoxy succinic acid 30 DEG C is 0.030-0.060dl/g.
13. methods according to claim 8, wherein, described copper material corrosion inhibitor is selected from least one in benzotriazole, methyl benzotriazazole and mercaptobenzothiazole; With recirculated cooling water often liter described for benchmark, the add-on of described copper material corrosion inhibitor is 0.25-4.5mg.
14. methods according to claim 13, wherein, the add-on of described copper material corrosion inhibitor is 0.5-4mg.
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| CN102452721A (en) * | 2010-10-20 | 2012-05-16 | 中国石油化工股份有限公司 | Non-phosphorus composite scale and corrosion inhibitor and application thereof in water treatment |
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