CN113830905A - Transformer circulating cooling water corrosion and scale inhibitor and preparation method thereof - Google Patents
Transformer circulating cooling water corrosion and scale inhibitor and preparation method thereof Download PDFInfo
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- CN113830905A CN113830905A CN202111145628.7A CN202111145628A CN113830905A CN 113830905 A CN113830905 A CN 113830905A CN 202111145628 A CN202111145628 A CN 202111145628A CN 113830905 A CN113830905 A CN 113830905A
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- phosphonic acid
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- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 110
- 230000007797 corrosion Effects 0.000 title claims abstract description 60
- 238000005260 corrosion Methods 0.000 title claims abstract description 60
- 239000000498 cooling water Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims description 18
- 229920002749 Bacterial cellulose Polymers 0.000 claims abstract description 52
- 239000005016 bacterial cellulose Substances 0.000 claims abstract description 52
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims abstract description 42
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 33
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 33
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 26
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 55
- BEGBSFPALGFMJI-UHFFFAOYSA-N ethene;sodium Chemical group [Na].C=C BEGBSFPALGFMJI-UHFFFAOYSA-N 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 25
- 229940090960 diethylenetriamine pentamethylene phosphonic acid Drugs 0.000 claims description 24
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 claims description 24
- BPSYZMLXRKCSJY-UHFFFAOYSA-N 1,3,2-dioxaphosphepan-2-ium 2-oxide Chemical compound O=[P+]1OCCCCO1 BPSYZMLXRKCSJY-UHFFFAOYSA-N 0.000 claims description 22
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 18
- 239000004202 carbamide Substances 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 16
- 238000009210 therapy by ultrasound Methods 0.000 claims description 16
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 229940120146 EDTMP Drugs 0.000 claims description 12
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000011734 sodium Substances 0.000 claims description 11
- 229910052708 sodium Inorganic materials 0.000 claims description 11
- LOGBRYZYTBQBTB-UHFFFAOYSA-N butane-1,2,4-tricarboxylic acid Chemical compound OC(=O)CCC(C(O)=O)CC(O)=O LOGBRYZYTBQBTB-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000005764 inhibitory process Effects 0.000 abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 49
- 230000000694 effects Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 239000010963 304 stainless steel Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241001415288 Coccidae Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000668 effect on calcium Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 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
- -1 iron ions Chemical class 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a corrosion and scale inhibitor for circulating cooling water of a transformer, belonging to the technical field of scale inhibitors. A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 70-85 parts of organic phosphonic acid scale inhibitor, 8-20 parts of zinc sulfate and 5-12 parts of bacterial cellulose. According to the invention, the organic phosphonic acid scale inhibitor is compounded with zinc sulfate and bacterial cellulose, so that the composite scale inhibitor has a wider application range to water quality, and the scale inhibition rate can reach 93-100% when the dosage is 15mg/L as shown by scale inhibition performance measurement of calcium carbonate.
Description
Technical Field
The invention belongs to the technical field of scale inhibitors, and particularly relates to a corrosion and scale inhibitor for circulating cooling water of a transformer and a preparation method thereof.
Background
The circulating water cooling system of the power transformer comprises two parts: an internal cooling system that ensures heat dissipation from the windings and core to the surrounding medium; and the external cooling system can ensure that the heat in the medium is dissipated to the outside of the transformer. The cooling water is repeatedly used ceaselessly, and the problems of dirt deposition, equipment corrosion, system pipeline blockage and the like are inevitably generated due to the rising of water temperature, the change of flow speed, the evaporation loss of water amount and the concentration of various inorganic ions and organic substances, so that the safe operation of the transformer is influenced. Therefore, the circulating water cooling water of the power transformer needs to be treated to prevent the above problems from affecting the safe operation of the transformer.
The research shows that the scale inhibiting and inhibiting treatment is performed on the scale in a more active and effective way besides improving the structure of the heat transfer equipment for scale inhibition. In the prior art, for example: CN109970276A discloses a circulating cooling water near-zero discharge system, which comprises a filtering system, a softening system, a dosing system and a PLC automatic control system; wherein, the dosing system consists of a corrosion and scale inhibitor dosing device and a pH value adjusting device; the corrosion and scale inhibitor dosing device comprises a drug storage tank and a drug tube arranged at the bottom of the drug storage tank. According to the near-zero discharge system of the circulating cooling water, the corrosion and scale inhibitor is added through the corrosion and scale inhibitor adding device, the corrosion and scale inhibitor can chemically react with the metal surface, and meanwhile, insoluble precipitates formed by the corrosion and scale inhibitor and calcium, magnesium and iron ions in water are deposited on the metal surface to prevent corrosion, so that the metal surface is passivated, and the pre-film effect is achieved. For another example, CN101591073A discloses a phosphorus-free corrosion and scale inhibitor, which contains 12-16% of lignin and tannin mixture, 55-65% of water, 0.7-0.8% of naoh, and H2SO41.7-2.2 percent of triethanolamine, 12-16 percent of maleic anhydride, 4-6 percent of borax and 3-5 percent of borax, and the phosphorus-free compound medicament blocks CaCO under low use concentration (less than 20mg/l)3The effect is general; when the using concentration is more than 20mg/l, the scale inhibition effect can meet the requirement, and when the using concentration is 60mg/l, the scale inhibition rate almost reaches 100 percent.
Disclosure of Invention
The invention aims to solve the technical problem of providing a corrosion and scale inhibitor for circulating cooling water of a transformer, aiming at the defects of the prior art and improving the scale inhibition performance of the circulating cooling water of the transformer.
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 70-85 parts of organic phosphonic acid scale inhibitor, 8-20 parts of zinc sulfate and 5-12 parts of bacterial cellulose.
Wherein, the weight parts can be selected from weight units such as kilogram, gram and the like. Specifically, the organic phosphonic acid scale inhibitor can be selected from 70 parts, 72 parts, 75 parts, 80 parts, 82 parts and 85 parts; the zinc sulfate can be selected from 8 parts, 9 parts, 10 parts, 12 parts, 15 parts, 17 parts, 18 parts and 20 parts; the bacterial cellulose can be selected from 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts and 12 parts.
Preferably, the organic phosphonic acid scale inhibitor is one or more than two of ethylene diamine tetra methylene phosphonic acid sodium, diethylenetriamine pentamethylene phosphonic acid and 2-phosphonic butane-1, 2, 4-tricarboxylic acid.
The sodium ethylene diamine tetra (methylene phosphonic acid) is nitrogen-containing organic polybasic phosphonic acid, can be chelated with a plurality of metal ions in an aqueous solution to form a plurality of macromolecular reticular complexes with monomer structures, is loosely dispersed in water, enables normal crystallization of calcium scale to be destroyed, and has good scale inhibition effect on calcium sulfate and barium sulfate scale; the diethylenetriamine pentamethylene phosphonic acid can inhibit the generation of carbonate and sulfate scales, and has better scale inhibition and corrosion inhibition performance in an alkaline environment; the 2-phosphonobutane-1, 2, 4-tricarboxylic acid has the structural characteristics of phosphonic acid and carboxylic acid, so that the phosphonic acid has good scale inhibition and corrosion inhibition performances. The preferable organic phosphonic acid scale inhibitor is compounded with zinc sulfate and bacterial cellulose, so that the scale inhibition effect of the composite scale inhibitor can be improved at low dosage.
Preferably, the organic phosphonic acid scale inhibitor is more than two of ethylene diamine tetra methylene phosphonic acid sodium, diethylenetriamine pentamethylene phosphonic acid and 2-phosphonic butane-1, 2, 4-tricarboxylic acid. More preferably, the organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonic acid and diethylenetriamine pentamethylene phosphonic acid, and the mass ratio of the sodium ethylene diamine tetra methylene phosphonic acid to the diethylenetriamine pentamethylene phosphonic acid is 1: (0.3-0.5); or the organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and 2-phosphonobutane-1, 2, 4-tricarboxylic acid, and the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the 2-phosphonobutane-1, 2, 4-tricarboxylic acid is 1: (0.7-1.2).
Preferably, the corrosion and scale inhibitor for the circulating cooling water of the transformer is prepared from the following raw materials in parts by weight: 80 parts of organic phosphonic acid scale inhibitor, 12 parts of zinc sulfate and 8 parts of bacterial cellulose.
Preferably, the preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution;
s02: sequentially adding the organic phosphonic acid scale inhibitor and zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor.
The bacterial cellulose is a fiber substance generated by microbial fermentation, and after being dissolved by a low-mass-concentration sodium hydroxide solution and a urea solution, the bacterial cellulose can be well dissolved with an organic phosphonic acid scale inhibitor and zinc sulfate to form a stable scale inhibition system, so that the scale inhibition effect of the composite scale inhibitor is improved.
Preferably, the mass fraction of the sodium hydroxide solution is 2-3%, and the mass fraction of the urea solution is 5-6%.
Preferably, the stirring temperature in the step S01 is 70 to 75 ℃.
Preferably, the ultrasonic treatment condition is 180-.
In the long-term operation of the circulating cooling water system, various insoluble substances are generated on the pipe wall of the pipeline and the surface of the heat exchange device, and are generally caused by complex chemical reactions and microbial growth and metabolism. These insoluble substances can cause certain hazards and effects to the circulatory system, including: 1) the efficiency of the heat exchanger is reduced, and the heat conduction effect of the heat exchanger is far lower than that of a heat exchange material because the dirt mainly comprises inorganic salt, slime and the like, so that the heat transfer performance of the heat exchanger is reduced; 2) the heat exchanger and the pipeline are blocked, after the system is scaled, the flow resistance of cooling water is increased during circulation, the flow speed and the heat exchange effect are affected, and if the scaling is not performed in time, the pipeline can be gradually blocked by the scale or the fallen soft scale. 3) Under-scale corrosion, which is a highly destructive local corrosion occurring under the scale, can destroy the surface of the equipment in a short time, causing serious consequences such as shutdown. Therefore, it is necessary to take scale inhibition preventive measures for the circulating cooling water system, the above preventive measures include physical methods and chemical methods, the physical methods include ultrasonic, electrostatic, mechanical scale removal and the like, the chemical methods include an ion exchange resin method, pH reduction, a scale inhibitor scale inhibition method and the like, wherein adding the scale inhibitor is the most common measure for solving the scale formation of the cooling water, and the scale inhibitor can not only effectively prevent scale formation, but also reduce scale deposition. The existing research shows that the scale inhibition mechanism of the scale inhibitor is generally divided into the following types: lattice distortion, complexation solubilization, and aggregation and dispersion. The single scale inhibitor often has certain defects in performance to influence the scale inhibition effect, different scale inhibitors have different scale inhibition mechanisms, the expectation of high-efficiency scale inhibition cannot be achieved due to improper compounding, and the dosage of the scale inhibitor can be increased.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the organic phosphonic acid scale inhibitor is compounded with zinc sulfate and bacterial cellulose, so that the compound scale inhibitor has wider application range to water quality, and the scale inhibition rate can reach 93-100% when the dosage is 15mg/L as shown by the scale inhibition performance measurement of calcium carbonate.
Secondly, the organic phosphonic acid scale inhibitor is preferably one or more than two of ethylene diamine tetra methylene phosphonic acid sodium, diethylenetriamine pentamethylene phosphonic acid and 2-phosphonic butane-1, 2, 4-tricarboxylic acid, and the compound scale inhibition effect of the organic phosphonic acid scale inhibitor, zinc sulfate and bacterial cellulose is more obvious; meanwhile, after the bacterial cellulose is dissolved, the bacterial cellulose has good intersolubility with the organic phosphonic acid scale inhibitor and zinc sulfate, and the chemical property of the system is stable, so that the scale inhibition effect of the composite scale inhibitor can be obviously improved, and the bacterial cellulose also has a certain corrosion inhibition effect and improves the corrosion inhibition effect of the system.
And moreover, the raw materials used in the invention are nontoxic and environment-friendly, have good chemical properties, do not cause secondary pollution, and have the advantages of low cost, simple and convenient operation and good practicability.
Detailed Description
In order to better understand the present invention, the following examples are further provided to clearly illustrate the contents of the present invention, but the contents of the present invention are not limited to the following examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
In the following examples of the present invention, sodium ethylene diamine tetra methylene phosphonate, diethylene triamine penta methylene phosphonic acid, 2-phosphonobutane-1, 2, 4-tricarboxylic acid, zinc sulfate and bacterial cellulose are all commercially available.
Example 1
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 80 parts of ethylenediamine tetramethylene phosphonic acid sodium, 12 parts of zinc sulfate and 8 parts of bacterial cellulose.
The preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution; s02: and sequentially adding the ethylenediamine tetramethylene phosphonic acid sodium and the zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor.
Wherein the mass fraction of the sodium hydroxide solution is 2 percent, and the mass fraction of the urea solution is 5 percent. The stirring temperature in the step S01 was 72 ℃. The ultrasonic treatment condition is 200W, and the time is 30 min.
Example 2
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 80 parts of diethylenetriamine pentamethylene phosphonic acid, 12 parts of zinc sulfate and 8 parts of bacterial cellulose.
The preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution; s02: and (3) sequentially adding diethylenetriamine pentamethylenephosphonic acid and zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor.
Wherein the mass fraction of the sodium hydroxide solution is 3 percent, and the mass fraction of the urea solution is 6 percent. The stirring temperature in step S01 was 75 ℃. The ultrasonic treatment condition is 180W, and the time is 40 min.
Example 3
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 80 parts of 2-phosphonobutane-1, 2, 4-tricarboxylic acid, 12 parts of zinc sulfate and 8 parts of bacterial cellulose.
The preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution; s02: and sequentially adding 2-phosphonobutane-1, 2, 4-tricarboxylic acid and zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor.
Wherein the mass fraction of the sodium hydroxide solution is 2 percent, and the mass fraction of the urea solution is 6 percent. The stirring temperature in the step S01 was 70 ℃. The ultrasonic treatment condition is 190W, and the time is 35 min.
Example 4
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 80 parts of organic phosphonic acid scale inhibitor, 12 parts of zinc sulfate and 8 parts of bacterial cellulose. The organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and diethylenetriamine pentamethylene phosphonic acid, and the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the diethylenetriamine pentamethylene phosphonic acid is 1: 0.4.
the preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution; s02: and sequentially adding the sodium ethylene diamine tetra methylene phosphonate, the diethylenetriamine pentamethylene phosphonic acid and the zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor.
Wherein the mass fraction of the sodium hydroxide solution is 2 percent, and the mass fraction of the urea solution is 5 percent. The stirring temperature in the step S01 was 72 ℃. The ultrasonic treatment condition is 200W, and the time is 30 min.
Example 5
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 70 parts of organic phosphonic acid scale inhibitor, 20 parts of zinc sulfate and 10 parts of bacterial cellulose. The organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and diethylenetriamine pentamethylene phosphonic acid, and the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the diethylenetriamine pentamethylene phosphonic acid is 1: 0.3.
the preparation method is shown in example 4.
Example 6
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 85 parts of organic phosphonic acid scale inhibitor, 8 parts of zinc sulfate and 7 parts of bacterial cellulose. The organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and diethylenetriamine pentamethylene phosphonic acid, and the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the diethylenetriamine pentamethylene phosphonic acid is 1: 0.5.
the preparation method is shown in example 4.
Example 7
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 80 parts of organic phosphonic acid scale inhibitor, 12 parts of zinc sulfate and 8 parts of bacterial cellulose. The organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and 2-phosphonobutane-1, 2, 4-tricarboxylic acid, wherein the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the 2-phosphonobutane-1, 2, 4-tricarboxylic acid is 1: 1.0.
the preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution; s02: and sequentially adding ethylene diamine tetra (methylene phosphonic acid) sodium, 2-phosphonic butane-1, 2, 4-tricarboxylic acid and zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor.
Wherein the mass fraction of the sodium hydroxide solution is 2 percent, and the mass fraction of the urea solution is 5 percent. The stirring temperature in the step S01 was 72 ℃. The ultrasonic treatment condition is 200W, and the time is 30 min.
Example 8
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 73 parts of organic phosphonic acid scale inhibitor, 15 parts of zinc sulfate and 12 parts of bacterial cellulose. The organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and 2-phosphonobutane-1, 2, 4-tricarboxylic acid, wherein the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the 2-phosphonobutane-1, 2, 4-tricarboxylic acid is 1: 0.7.
the preparation process is described in example 7.
Example 9
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 85 parts of organic phosphonic acid scale inhibitor, 10 parts of zinc sulfate and 5 parts of bacterial cellulose. The organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and 2-phosphonobutane-1, 2, 4-tricarboxylic acid, wherein the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the 2-phosphonobutane-1, 2, 4-tricarboxylic acid is 1: 1.2.
see example 7 for the preparation method.
Example 10
A corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 80 parts of organic phosphonic acid scale inhibitor, 12 parts of zinc sulfate and 8 parts of bacterial cellulose. The organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate, diethylene triamine penta methylene phosphonic acid and 2-phosphonic butane-1, 2, 4-tricarboxylic acid, and the composition of the sodium ethylene diamine tetra methylene phosphonate, the diethylene triamine penta methylene phosphonic acid and the 2-phosphonic butane-1, 2, 4-tricarboxylic acid is 1: 1: 1.
the preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution; s02: and sequentially adding ethylene diamine tetra methylene phosphonic acid sodium, diethylenetriamine pentamethylene phosphonic acid, 2-phosphonic butane-1, 2, 4-tricarboxylic acid and zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor. Wherein the mass fraction of the sodium hydroxide solution is 2 percent, and the mass fraction of the urea solution is 5 percent. The stirring temperature in the step S01 was 72 ℃. The ultrasonic treatment condition is 200W, and the time is 30 min.
Comparative example 1:the difference from example 4 is: the mass ratio of the ethylene diamine tetramethylene phosphonic acid sodium to the diethylenetriamine pentamethylene phosphonic acid is 1: 1.
comparative example 2:the difference from example 7 is: the mass ratio of the ethylene diamine tetra methylene phosphonic acid sodium to the 2-phosphonic butane-1, 2, 4-tricarboxylic acid is 0.5: 1.
comparative example 3:the difference from example 4 is: in the preparation method of the corrosion and scale inhibitor for the circulating cooling water of the transformer, the mass fraction of the sodium hydroxide solution is 5%, and the mass fraction of the urea solution is 10%. The stirring temperature in the step S01 was 20 ℃.
Comparative example 4:the difference from example 4 is: a corrosion and scale inhibitor for circulating cooling water of a transformer is prepared from the following raw materials in parts by weight: 60 parts of organic phosphonic acid scale inhibitor, 25 parts of zinc sulfate and 15 parts of bacterial cellulose.
Performance evaluation:
(1) and (3) measuring the scale inhibition performance: the scale inhibition performance is determined according to GB16632-2008, the scale inhibition effect of the calcium carbonate is determined, and the scale inhibition performance is obtained by calculation
(%), the test results are shown in the following table:
the results show that the preferable organic phosphonic acid scale inhibitor is compounded with zinc sulfate and bacterial cellulose, the excellent scale inhibition performance is shown on calcium carbonate under the condition of 15mg/L, and the effect is more remarkable than that of singly using the raw materials.
(2) And (3) corrosion inhibition performance determination: referring to a GB/T18175-2014 water treatment agent corrosion inhibition performance measurement rotary hanging piece method, the test period is 60 days, the test water sample is transformer circulating cooling water, the pH of the test solution is 6.9-7.5, the temperature of the test solution is 8-12 degrees, the weight loss condition of a 304 stainless steel hanging piece is measured, the corrosion inhibition rate (%) is obtained by calculation, and the test results are shown in the following table:
the results show that the scale inhibitor has good corrosion inhibition effect under the condition of 15 mg/L.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A corrosion and scale inhibitor for circulating cooling water of a transformer is characterized in that: the feed is prepared from the following raw materials in parts by weight: 70-85 parts of organic phosphonic acid scale inhibitor, 8-20 parts of zinc sulfate and 5-12 parts of bacterial cellulose.
2. The corrosion and scale inhibitor for transformer circulating cooling water as claimed in claim 1, wherein: the organic phosphonic acid scale inhibitor is one or more than two of ethylene diamine tetra methylene phosphonic acid sodium, diethylene triamine pentamethylene phosphonic acid and 2-phosphonic butane-1, 2, 4-tricarboxylic acid.
3. The corrosion and scale inhibitor for transformer circulating cooling water as claimed in claim 2, wherein: the organic phosphonic acid scale inhibitor is more than two of ethylene diamine tetra methylene phosphonic acid sodium, diethylene triamine pentamethylene phosphonic acid and 2-phosphonic butane-1, 2, 4-tricarboxylic acid.
4. The corrosion and scale inhibitor for transformer circulating cooling water as claimed in claim 3, wherein: the organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and diethylenetriamine pentamethylene phosphonic acid, and the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the diethylenetriamine pentamethylene phosphonic acid is 1: (0.3-0.5).
5. The corrosion and scale inhibitor for transformer circulating cooling water as claimed in claim 3, wherein: the organic phosphonic acid scale inhibitor is a composition of sodium ethylene diamine tetra methylene phosphonate and 2-phosphonobutane-1, 2, 4-tricarboxylic acid, wherein the mass ratio of the sodium ethylene diamine tetra methylene phosphonate to the 2-phosphonobutane-1, 2, 4-tricarboxylic acid is 1: (0.7-1.2).
6. The corrosion and scale inhibitor for transformer circulating cooling water according to any one of claims 1 to 5, wherein: the feed is prepared from the following raw materials in parts by weight: 80 parts of organic phosphonic acid scale inhibitor, 12 parts of zinc sulfate and 8 parts of bacterial cellulose.
7. The method for preparing the corrosion and scale inhibitor for the circulating cooling water of the transformer as claimed in any one of claims 1 to 5, wherein the corrosion and scale inhibitor comprises the following components in percentage by weight: the method comprises the following steps:
s01: the following raw materials are provided: adding the bacterial cellulose into a sodium hydroxide solution, stirring at a high speed, adding a urea solution, continuously stirring, and centrifuging to remove insoluble substances to obtain a bacterial cellulose solution;
s02: sequentially adding the organic phosphonic acid scale inhibitor and zinc sulfate into the bacterial cellulose solution, and performing ultrasonic treatment to obtain the scale inhibitor.
8. The preparation method of the corrosion and scale inhibitor for transformer circulating cooling water as claimed in claim 7, wherein the corrosion and scale inhibitor comprises the following steps: the mass fraction of the sodium hydroxide solution is 2-3%, and the mass fraction of the urea solution is 5-6%.
9. The preparation method of the corrosion and scale inhibitor for transformer circulating cooling water as claimed in claim 7, wherein the corrosion and scale inhibitor comprises the following steps: the stirring temperature in the step S01 is 70-75 ℃.
10. The preparation method of the corrosion and scale inhibitor for transformer circulating cooling water as claimed in claim 7, wherein the corrosion and scale inhibitor comprises the following steps: the ultrasonic treatment condition is 180-200W, and the time is 30-40 min.
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