CN104528966A - Corrosion mitigation and scale inhibition method for aluminum heat exchanger - Google Patents
Corrosion mitigation and scale inhibition method for aluminum heat exchanger Download PDFInfo
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- CN104528966A CN104528966A CN201410814523.XA CN201410814523A CN104528966A CN 104528966 A CN104528966 A CN 104528966A CN 201410814523 A CN201410814523 A CN 201410814523A CN 104528966 A CN104528966 A CN 104528966A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 86
- 230000007797 corrosion Effects 0.000 title claims abstract description 82
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 33
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000005764 inhibitory process Effects 0.000 title abstract description 15
- 230000000116 mitigating effect Effects 0.000 title abstract 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- -1 poly(diallyldimethylammonium chloride) Polymers 0.000 claims abstract description 21
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 13
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims abstract description 13
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims abstract description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 13
- HDTRYLNUVZCQOY-UHFFFAOYSA-N α-D-glucopyranosyl-α-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OC1C(O)C(O)C(O)C(CO)O1 HDTRYLNUVZCQOY-UHFFFAOYSA-N 0.000 claims abstract description 10
- HDTRYLNUVZCQOY-WSWWMNSNSA-N Trehalose Natural products O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-WSWWMNSNSA-N 0.000 claims abstract description 10
- HDTRYLNUVZCQOY-LIZSDCNHSA-N alpha,alpha-trehalose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-LIZSDCNHSA-N 0.000 claims abstract description 10
- 229940100555 2-methyl-4-isothiazolin-3-one Drugs 0.000 claims abstract description 9
- BEGLCMHJXHIJLR-UHFFFAOYSA-N methylisothiazolinone Chemical compound CN1SC=CC1=O BEGLCMHJXHIJLR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 239000004312 hexamethylene tetramine Substances 0.000 claims abstract description 8
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 8
- 230000002401 inhibitory effect Effects 0.000 claims description 69
- 239000007788 liquid Substances 0.000 claims description 52
- 239000004411 aluminium Substances 0.000 claims description 29
- 239000002455 scale inhibitor Substances 0.000 claims description 29
- 238000003756 stirring Methods 0.000 claims description 28
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 26
- 239000000498 cooling water Substances 0.000 claims description 21
- GFLJTEHFZZNCTR-UHFFFAOYSA-N 3-prop-2-enoyloxypropyl prop-2-enoate Chemical compound C=CC(=O)OCCCOC(=O)C=C GFLJTEHFZZNCTR-UHFFFAOYSA-N 0.000 claims description 12
- 235000019353 potassium silicate Nutrition 0.000 claims description 12
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 10
- ZCTXEAQXZGPWFG-UHFFFAOYSA-N imidurea Chemical compound O=C1NC(=O)N(CO)C1NC(=O)NCNC(=O)NC1C(=O)NC(=O)N1CO ZCTXEAQXZGPWFG-UHFFFAOYSA-N 0.000 claims description 8
- 229940113174 imidurea Drugs 0.000 claims description 8
- DLICJXPMMTZITN-UHFFFAOYSA-N 3-methyl-1,2-thiazol-4-one Chemical class CC1=NSCC1=O DLICJXPMMTZITN-UHFFFAOYSA-N 0.000 claims description 5
- AYRVGWHSXIMRAB-UHFFFAOYSA-M sodium acetate trihydrate Chemical compound O.O.O.[Na+].CC([O-])=O AYRVGWHSXIMRAB-UHFFFAOYSA-M 0.000 claims description 5
- 150000003625 trehaloses Chemical class 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 238000003860 storage Methods 0.000 abstract description 2
- BVTHRGZMQHOCOL-UHFFFAOYSA-N OCC(O)(C1(NC(=O)NCNC(=O)NC2(CO)NC(=O)NC2=O)NC(=O)NC1=O)CO Chemical compound OCC(O)(C1(NC(=O)NCNC(=O)NC2(CO)NC(=O)NC2=O)NC(=O)NC1=O)CO BVTHRGZMQHOCOL-UHFFFAOYSA-N 0.000 abstract 1
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- FYFFGSSZFBZTAH-UHFFFAOYSA-N methylaminomethanetriol Chemical compound CNC(O)(O)O FYFFGSSZFBZTAH-UHFFFAOYSA-N 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 8
- 239000011574 phosphorus Substances 0.000 description 8
- 229910052698 phosphorus Inorganic materials 0.000 description 8
- 239000002253 acid Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 150000007980 azole derivatives Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- JMTIXSZQYHAMLY-UHFFFAOYSA-N [P].[Zn] Chemical compound [P].[Zn] JMTIXSZQYHAMLY-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N methyl monoether Natural products COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 229920001444 polymaleic acid Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical group [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Abstract
The invention discloses a corrosion mitigation and scale inhibition method for an aluminum heat exchanger, belonging to the field of water treatment. A corrosion mitigation and scale inhibition agent used in the invention comprises polyaspartic acid, sodium silicate, phthalic diglycol diacrylate, poly(diallyldimethylammonium chloride), hexamethylenetetramine, bis(hydroxymethyl)-imidazolidinyl urea, methylisothiazolinone, trehalose, trihydroxymethyl aminomethane and water. The corrosion mitigation and scale inhibition agent prepared through an appropriate technical process has the advantages of storage stability, safe and environment-friendly components, no environmental pollution and the like, has excellent corrosion mitigation effect on an aluminum heat exchanger, is simple in preparation method, reasonable in design and easy to prepare, and has favorable application prospects.
Description
Technical field
The invention belongs to water treatment field, more particularly, relate to a kind of corrosion-proofing and antisludging method of aluminium heat-exchange device.
Background technology
Due to the worsening shortages of Freshwater resources, industrial circulating water cooling treatment medicament is more and more subject to people's attention, recirculated cooling water is along with the whole process of producing, account for the 70-80% of total water consumption, recirculated cooling water in use constantly evaporates and concentrates, make cooling water pipeline fouling, corrosion phenomenon more serious, easily grow bacterium algae, so that affecting the heat-transfer effect of equipment and shorten the work-ing life of equipment, for addressing these problems, water conditioning must be carried out to recirculated cooling water.Organic phospho acid is a now widely used class water conditioner, and it is the exploitation of external the mid-1960s, the class water conditioner be identified the seventies, have good chemical stability, high thermal resistance and have that consumption is few concurrently, the feature such as inhibition and scale effect.In addition, organic phospho acid has excellent sequestering power to many metal ions, and they solve the problem that system produces calcium carbonate scale, and C-P key exists makes its stable chemical performance, more high temperature resistant, has obviously " threshold effect " and " synergistic effect ".Its defect is calcium phosphate scale, zinc dirt and the ferric oxide deposition problems that organic phospho acid can not suppress to produce in phosphorus system and phosphorus zinc system water treatment formula effectively, and phosphorus-containing wastewater discharge causes body eutrophication and marine red tide problem.External implemented limit phosphorus or prohibited phosphorus measure, China also advocates low-phosphorous and without the exploitation of phosphorus product energetically.Copolymer antisludging agent is a kind of New Type Water Treatment Chemicals developed after entering the eighties, good, the without phosphorus pollution of its superior performance, compatibility, development prospect are wide, but its price is high, is used alone and can not meets water treatment needs, therefore the composite rear use of other components need be added.
Through retrieval, Chinese patent application publication number CN 101560022 B discloses a kind of composite slow-corrosion scale resistor, this corrosion inhibiting and descaling agent is by organic phospho acid 15% ~ 30%, vinylformic acid or acrylic copolymer 10% ~ 20%, polymaleic acid 2% ~ 10%, azole derivative 1% ~ 3%, multi-element organic amine sulfonate 15% ~ 30%, dimethyl formamide or alcohol 2% ~ 6%, the raw material of water 20% ~ 35% quality proportioning is made, this invention composite slow-corrosion scale resistor is used for the system of middle water as recirculated cooling water, the corrosion that in can solving, water cycle water causes equipment, but the higher and complicated components of phosphorus content in this composite slow-corrosion scale resistor, be only applicable to the system of middle water as recirculated cooling water, application is restricted.Chinese patent application publication number CN 102897925 A discloses a kind of corrosion inhibiting and descaling agent, its raw material and weight proportion thereof are: molybdate 8-12%, nitrite 12-15%, azole derivative 4-6%, sodium acrylate-hydroxyethyl methylacrylate-methyl acrylate copolymer 10-15%, all the other for concentration be 4-5wt% alkaline solution, this invention corrosion inhibiting and descaling agent is without zinc, alkalescence, molybdenum system formula, be applicable to softening water closed circuit circulatory system, but the molybdate in inhibiter component and nitrite are toxic substance, can to environment.Therefore, in order to meet current water treatment needs, being badly in need of developing a kind of toxicity low, environment, human body and crop are safe from harm, and the corrosion inhibiting and descaling agent that corrosion-mitigation scale-inhibition efficiency is high, cost is low.It is light that aluminium has material, heat conduction is good, be easy to processing and in neutrality, the feature such as very anti-corrosion in the water of weakly acidic pH and air, be widely used in and manufacture aluminum plate type cold exchange device, condenser, air cooler, crystallizer, reactor, moisture eliminator, storage tank, tank car and pipe arrangement etc., in building, communications and transportation, light industry and the industry such as civilian also have a large amount of application, aluminium cold exchange device in use for some time, dust, greasy dirt, working mediums etc. are easy to form dirt in equipment surface, larger thermal resistance is also formed while aluminium corrosion below dirt, have a strong impact on equipment refrigeration, therefore the corrosion-proofing and antisludging method studying a kind of aluminium heat-exchange device is needed.
Summary of the invention
1. the problem that will solve
High for the high-efficiency corrosion-mitigation scale-inhibition method and corrosion inhibiting and descaling agent phosphorus content that are not suitable for aluminium heat-exchange device in prior art, to the problem such as environment, human body and crop be unfriendly, the invention provides a kind of corrosion-proofing and antisludging method of aluminium heat-exchange device, corrosion inhibiting and descaling agent of the present invention have not phosphorous, component safety and environmental protection, production technique are simple, the advantages such as scale inhibition efficiency is high, corrosion inhibition is good, belong to environmentally friendly inhibiter.
2. technical scheme
In order to solve the problem, the technical solution adopted in the present invention is as follows:
A corrosion-proofing and antisludging method for aluminium heat-exchange device, the steps include:
A () prepares slow-release scale inhibitor, the moiety of slow-release scale inhibitor and the mass fraction of each component are: 10-15 part poly aspartic acid, 20-30 part water glass, 10-15 part PDDA, 15-20 part polydiene base third alkyl dimethyl ammonium chloride, 8-15 part hexamethylenetetramine, 10-18 part two (methylol) Imidurea, 5-10 part methylisothiazolinone, 5-10 part trehalose, 8-12 part Tutofusin tris, 60-80 part water;
B the slow-release scale inhibitor of preparation in step (a) adds in recirculated cooling water by (), wherein the concentration of slow-release scale inhibitor in recirculated cooling water is 500-800 ppm;
C recirculated cooling water that () will pass in aluminium heat-exchange device containing slow-release scale inhibitor in step (b), carries out heat-exchanging process.
Preferably, the mass fraction of each component of the slow-release scale inhibitor in step (a) is: 10 parts of poly aspartic acids, 25 parts of water glass, 15 parts of PDDA, 15 parts of polydiene base third alkyl dimethyl ammonium chlorides, 8 parts of hexamethylenetetramines, 16 parts of two (methylol) Imidureas, 10 parts of methylisothiazolinones, 5 portions of trehaloses, 10 parts of Tutofusin triss, 68 parts of water.
Preferably, the preparation method of the slow-release scale inhibitor in described step (a) is:
(1) take poly aspartic acid 10-15 part, water glass 20-30 part, 15-20 part polydiene base third alkyl dimethyl ammonium chloride, Tutofusin tris 4-6 part and 20-25 part water by mass fraction to stir, obtain the A liquid of corrosion inhibiting and descaling agent;
(2) take Tutofusin tris 4-6 part, PDDA 10-15 part, trehalose 5-10 part and 20-25 part water by mass fraction to stir, and be heated to 30-40 DEG C of insulation 0.5-1 h, obtain the B liquid of corrosion inhibiting and descaling agent;
(3) take hexamethylenetetramine 8-15 part, two (methylol) Imidurea 10-18 part, methylisothiazolinone 5-10 part and 20-30 part water by mass fraction to stir, obtain the C liquid of corrosion inhibiting and descaling agent;
(4) the corrosion inhibiting and descaling agent C liquid obtained in the corrosion inhibiting and descaling agent A liquid obtained in step (1) and step (3) is uniformly mixed, obtains the D liquid of corrosion inhibiting and descaling agent;
(5) after the B liquid of the corrosion inhibiting and descaling agent in step (2) is cooled to 20-25 DEG C, under the condition stirred, the corrosion inhibiting and descaling agent D drop obtained in step (4) is added in B liquid;
(6) be warming up to 30-40 DEG C after the D liquid in step (5) dropwises, after stirring insulation 0.5-1 h, obtain corrosion inhibiting and descaling agent according to claim 1.
Preferably, the stirring velocity in described step (1), step (2) and step (3) is 110-150 rpm.
Preferably, in described step (5), stirring velocity is 220-240 rpm.
Preferably, in described step (5), the rate of addition of corrosion inhibiting and descaling agent D liquid is 25-40 g/min.
3. beneficial effect
Compared to prior art, beneficial effect of the present invention is:
(1) corrosion inhibiting and descaling agent of the present invention is not phosphorous, component safety and environmental protection, production technique simple, and scale inhibition efficiency is high, corrosion inhibition good, compared with corrosion inhibiting and descaling agent of the prior art, improves more than 30% to the anticorrosion-antiscaling effect of aluminium heat-exchange device;
(2) two (methylol) Imidurea in corrosion inhibiting and descaling agent component of the present invention and methylisothiazolinone, with the use of having the effect suppressing microbial growth in water coolant, can significantly improve the result of use of corrosion inhibiting and descaling agent;
(3) when polydiene base third alkyl dimethyl ammonium chloride in corrosion inhibiting and descaling agent component of the present invention is used alone, anticorrosion-antiscaling effect is general, but add trehalose in component after, polydiene base third alkyl dimethyl ammonium chloride and trehalose can form layer protecting film at the internal surface of aluminium heat-exchange device, and this layer of protective membrane can effectively stop ion in water coolant and other materials to the corrosive nature of aluminium heat-exchange device;
(4) preparation method of corrosion inhibiting and descaling agent of the present invention is simple, the corrosion inhibiting and descaling agent B liquid prepared under 30-40 DEG C of condition is uniformly dispersed, under 220-240 rpm stirring velocity, corrosion inhibiting and descaling agent D drop to be added in B liquid and to be incubated 0.5-1 h, the corrosion inhibiting and descaling agent Be very effective obtained under this condition, be easy to manufacture, there is good commercial application prospect.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further.
embodiment 1
A corrosion-proofing and antisludging method for aluminium heat-exchange device, the steps include:
A () prepares slow-release scale inhibitor, the moiety of slow-release scale inhibitor and the mass fraction of each component are: 10 parts of poly aspartic acids, 25 parts of water glass, 15 parts of PDDA, 15 parts of polydiene base third alkyl dimethyl ammonium chlorides, 8 parts of hexamethylenetetramines, 16 parts of two (methylol) Imidureas, 10 parts of methylisothiazolinones, 5 portions of trehaloses, 10 parts of Tutofusin triss, 68 parts of water;
B the slow-release scale inhibitor of preparation in step (a) adds in recirculated cooling water by (), wherein the concentration of slow-release scale inhibitor in recirculated cooling water is 500 ppm;
C recirculated cooling water that () will pass in aluminium heat-exchange device containing slow-release scale inhibitor in step (b), carries out heat-exchanging process.
Wherein, the step preparing corrosion inhibiting and descaling agent in step (a) is:
(1) take poly aspartic acid 10 parts by mass fraction, water glass 25 parts, 15 parts of polydiene base third alkyl dimethyl ammonium chlorides, Tutofusin tris 6 parts and 20 parts of water stir under 110 rpm speed, obtain the A liquid of corrosion inhibiting and descaling agent;
(2) take Tutofusin tris 4 parts, PDDA 15 parts, trehalose 5 parts and 25 parts of water by mass fraction to stir under 110 rpm speed, and be heated to 30 DEG C of insulation 1 h, obtain the B liquid of corrosion inhibiting and descaling agent;
(3) take hexamethylenetetramine 8 parts, two (methylol) Imidurea 16 parts, methylisothiazolinone 10 parts and 23 parts of water by mass fraction to stir under 110 rpm speed, obtain the C liquid of corrosion inhibiting and descaling agent;
(4) the corrosion inhibiting and descaling agent C liquid obtained in the corrosion inhibiting and descaling agent A liquid obtained in step (1) and step (3) is uniformly mixed, obtains the D liquid of corrosion inhibiting and descaling agent;
(5) after the B liquid of the corrosion inhibiting and descaling agent in step (2) is cooled to 20 DEG C, add in B liquid by the corrosion inhibiting and descaling agent D drop obtained in step (4) under the stirring velocity of 220 rpm, rate of addition is 25 g/min;
(6) be warming up to 30 DEG C after the D liquid in step (5) dropwises, after stirring insulation 1 h, obtain corrosion inhibiting and descaling agent according to claim 1.
High efficiency corrosion inhibiting scale retardant water treatment efficiency prepared by the present embodiment is good, for shelf-stable, preserves 2 years at the situation lower seal of unglazed photograph, and considerable change does not occur for performance and the indices of liquid.After testing, when the concentration of the corrosion inhibiting and descaling agent in this enforcement is 500 ppm, be 97.5% to the corrosion inhibition rate of aluminium heat-exchange device, scale inhibition efficiency is 96.7%.
embodiment 2
A corrosion-proofing and antisludging method for aluminium heat-exchange device, the steps include:
A () prepares slow-release scale inhibitor, the moiety of slow-release scale inhibitor and the mass fraction of each component are: 15 parts of poly aspartic acids, 20 parts of water glass, 13 parts of PDDA, 20 parts of polydiene base third alkyl dimethyl ammonium chlorides, 12 parts of hexamethylenetetramines, 10 parts of two (methylol) Imidureas, 5 parts of methylisothiazolinones, 10 portions of trehaloses, 8 parts of Tutofusin triss, 60 parts of water.
B the slow-release scale inhibitor of preparation in step (a) adds in recirculated cooling water by (), wherein the concentration of slow-release scale inhibitor in recirculated cooling water is 700 ppm;
C recirculated cooling water that () will pass in aluminium heat-exchange device containing slow-release scale inhibitor in step (b), carries out heat-exchanging process.
Wherein, the step preparing corrosion inhibiting and descaling agent in step (a) is:
(1) take poly aspartic acid 15 parts by mass fraction, water glass 20 parts, 20 parts of polydiene base third alkyl dimethyl ammonium chlorides, Tutofusin tris 4 parts and 20 parts of water stir under 120 rpm speed, obtain the A liquid of corrosion inhibiting and descaling agent;
(2) take Tutofusin tris 4 parts, PDDA 13 parts, trehalose 10 parts and 20 parts of water by mass fraction to stir under 120 rpm speed, and be heated to 35 DEG C of insulation 0.8 h, obtain the B liquid of corrosion inhibiting and descaling agent;
(3) take hexamethylenetetramine 12 parts, two (methylol) Imidurea 10 parts, methylisothiazolinone 5 parts and 20 parts of water by mass fraction to stir under 120 rpm speed, obtain the C liquid of corrosion inhibiting and descaling agent;
(4) the corrosion inhibiting and descaling agent C liquid obtained in the corrosion inhibiting and descaling agent A liquid obtained in step (1) and step (3) is uniformly mixed, obtains the D liquid of corrosion inhibiting and descaling agent;
(5) after the B liquid of the corrosion inhibiting and descaling agent in step (2) is cooled to 25 DEG C, add in B liquid by the corrosion inhibiting and descaling agent D drop obtained in step (4) under the stirring velocity of 230 rpm, rate of addition is 30 g/min;
(6) be warming up to 35 DEG C after the D liquid in step (5) dropwises, after stirring insulation 0.8 h, obtain corrosion inhibiting and descaling agent according to claim 1.
Corrosion inhibiting and descaling agent water treatment efficiency prepared by the present embodiment is good, for shelf-stable, preserves 3 years at the situation lower seal of unglazed photograph, and considerable change does not occur for performance and the indices of liquid.After tested, when the concentration of inhibiter is 700 ppm, be 98.2% to the corrosion inhibition rate of aluminium heat-exchange device, scale inhibition efficiency is 94.7%.
embodiment 3
A corrosion-proofing and antisludging method for aluminium heat-exchange device, the steps include:
A () prepares slow-release scale inhibitor, the moiety of slow-release scale inhibitor and the mass fraction of each component are: 12 parts of poly aspartic acids, 30 parts of water glass, 10 parts of PDDA, 18 parts of polydiene base third alkyl dimethyl ammonium chlorides, 15 parts of hexamethylenetetramines, 18 parts of two (methylol) Imidureas, 8 parts of methylisothiazolinones, 7 portions of trehaloses, 12 parts of Tutofusin triss, 80 parts of water.
B the slow-release scale inhibitor of preparation in step (a) adds in recirculated cooling water by (), wherein the concentration of slow-release scale inhibitor in recirculated cooling water is 800 ppm;
C recirculated cooling water that () will pass in aluminium heat-exchange device containing slow-release scale inhibitor in step (b), carries out heat-exchanging process.
Wherein, the step preparing corrosion inhibiting and descaling agent in step (a) is:
(1) take poly aspartic acid 12 parts by mass fraction, water glass 30 parts, 18 parts of polydiene base third alkyl dimethyl ammonium chlorides, Tutofusin tris 6 parts and 25 parts of water stir under 150 rpm speed, obtain the A liquid of corrosion inhibiting and descaling agent;
(2) take Tutofusin tris 6 parts, PDDA 10 parts, trehalose 7 parts and 25 parts of water by mass fraction to stir under 150 rpm speed, and be heated to 40 DEG C of insulation 0.5 h, obtain the B liquid of corrosion inhibiting and descaling agent;
(3) take hexamethylenetetramine 15 parts, two (methylol) Imidurea 18 parts, methylisothiazolinone 8 parts and 30 parts of water by mass fraction to stir under 150 rpm speed, obtain the C liquid of corrosion inhibiting and descaling agent;
(4) the corrosion inhibiting and descaling agent C liquid obtained in the corrosion inhibiting and descaling agent A liquid obtained in step (1) and step (3) is uniformly mixed, obtains the D liquid of corrosion inhibiting and descaling agent;
(5) after the B liquid of the corrosion inhibiting and descaling agent in step (2) is cooled to 23 DEG C, add in B liquid by the corrosion inhibiting and descaling agent D drop obtained in step (4) under the stirring velocity of 240 rpm, rate of addition is 40 g/min;
(6) be warming up to 40 DEG C after the D liquid in step (5) dropwises, after stirring insulation 0.5 h, obtain corrosion inhibiting and descaling agent according to claim 1.
High efficiency corrosion inhibiting scale retardant water treatment efficiency prepared by the present embodiment is good, for shelf-stable, preserves 3 years at the situation lower seal of unglazed photograph, and considerable change does not occur for performance and the indices of liquid.After tested, when the concentration of inhibiter is 800 ppm, be 96.9% to the corrosion inhibition rate of aluminium heat-exchange device, scale inhibition efficiency is 97.7%.
Claims (6)
1. a corrosion-proofing and antisludging method for aluminium heat-exchange device, the steps include:
A () prepares slow-release scale inhibitor, the moiety of slow-release scale inhibitor and the mass fraction of each component are: 10-15 part poly aspartic acid, 20-30 part water glass, 10-15 part PDDA, 15-20 part polydiene base third alkyl dimethyl ammonium chloride, 8-15 part hexamethylenetetramine, 10-18 part two (methylol) Imidurea, 5-10 part methylisothiazolinone, 5-10 part trehalose, 8-12 part Tutofusin tris, 60-80 part water;
B the slow-release scale inhibitor of preparation in step (a) adds in recirculated cooling water by (), wherein the concentration of slow-release scale inhibitor in recirculated cooling water is 500-800 ppm;
C recirculated cooling water that () will pass in aluminium heat-exchange device containing slow-release scale inhibitor in step (b), carries out heat-exchanging process.
2. the corrosion-proofing and antisludging method of a kind of aluminium heat-exchange device according to claim 1, is characterized in that: the mass fraction of each component of the slow-release scale inhibitor in step (a) is: 10 parts of poly aspartic acids, 25 parts of water glass, 15 parts of PDDA, 15 parts of polydiene base third alkyl dimethyl ammonium chlorides, 8 parts of hexamethylenetetramines, 16 parts of two (methylol) Imidureas, 10 parts of methylisothiazolinones, 5 portions of trehaloses, 10 parts of Tutofusin triss, 68 parts of water.
3. the corrosion-proofing and antisludging method of a kind of aluminium heat-exchange device according to claim 1, is characterized in that: the preparation method of the slow-release scale inhibitor in described step (a) is:
(1) take poly aspartic acid 10-15 part, water glass 20-30 part, 15-20 part polydiene base third alkyl dimethyl ammonium chloride, Tutofusin tris 4-6 part and 20-25 part water by mass fraction to stir, obtain the A liquid of corrosion inhibiting and descaling agent;
(2) take Tutofusin tris 4-6 part, PDDA 10-15 part, trehalose 5-10 part and 20-25 part water by mass fraction to stir, and be heated to 30-40 DEG C of insulation 0.5-1 h, obtain the B liquid of corrosion inhibiting and descaling agent;
(3) take hexamethylenetetramine 8-15 part, two (methylol) Imidurea 10-18 part, methylisothiazolinone 5-10 part and 20-30 part water by mass fraction to stir, obtain the C liquid of corrosion inhibiting and descaling agent;
(4) the corrosion inhibiting and descaling agent C liquid obtained in the corrosion inhibiting and descaling agent A liquid obtained in step (1) and step (3) is uniformly mixed, obtains the D liquid of corrosion inhibiting and descaling agent;
(5) after the B liquid of the corrosion inhibiting and descaling agent in step (2) is cooled to 20-25 DEG C, under the condition stirred, the corrosion inhibiting and descaling agent D drop obtained in step (4) is added in B liquid;
(6) be warming up to 30-40 DEG C after the D liquid in step (5) dropwises, after stirring insulation 0.5-1 h, obtain corrosion inhibiting and descaling agent according to claim 1.
4. the corrosion-proofing and antisludging method of a kind of aluminium heat-exchange device according to claim 3, is characterized in that: the stirring velocity in described step (1), step (2) and step (3) is 110-150 rpm.
5. the corrosion-proofing and antisludging method of a kind of aluminium heat-exchange device according to claim 3, is characterized in that: in described step (5), stirring velocity is 220-240 rpm.
6. the corrosion-proofing and antisludging method of a kind of aluminium heat-exchange device according to claim 3, is characterized in that: in described step (5), the rate of addition of corrosion inhibiting and descaling agent D liquid is 25-40 g/min.
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