CN112299575A - Composite phosphorus-free corrosion and scale inhibitor applied to coke dry quenching waste heat boiler and preparation method thereof - Google Patents
Composite phosphorus-free corrosion and scale inhibitor applied to coke dry quenching waste heat boiler and preparation method thereof Download PDFInfo
- Publication number
- CN112299575A CN112299575A CN202011091263.XA CN202011091263A CN112299575A CN 112299575 A CN112299575 A CN 112299575A CN 202011091263 A CN202011091263 A CN 202011091263A CN 112299575 A CN112299575 A CN 112299575A
- Authority
- CN
- China
- Prior art keywords
- parts
- waste heat
- boiler
- scale inhibitor
- dry quenching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 49
- 238000005260 corrosion Methods 0.000 title claims abstract description 49
- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000010791 quenching Methods 0.000 title claims abstract description 28
- 230000000171 quenching effect Effects 0.000 title claims abstract description 28
- 239000002918 waste heat Substances 0.000 title claims abstract description 28
- 239000000571 coke Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 45
- ODHYIQOBTIWVRZ-UHFFFAOYSA-N n-propan-2-ylhydroxylamine Chemical compound CC(C)NO ODHYIQOBTIWVRZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 18
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 18
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 18
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 17
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 17
- 239000012498 ultrapure water Substances 0.000 claims abstract description 17
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 16
- 229930182478 glucoside Natural products 0.000 claims abstract description 15
- 150000008131 glucosides Chemical class 0.000 claims abstract description 15
- VFKZECOCJCGZQK-UHFFFAOYSA-M 3-hydroxypropyl(trimethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CCCO VFKZECOCJCGZQK-UHFFFAOYSA-M 0.000 claims abstract description 13
- 229920001661 Chitosan Polymers 0.000 claims abstract description 13
- 239000003814 drug Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 30
- 230000005764 inhibitory process Effects 0.000 abstract description 24
- 239000003795 chemical substances by application Substances 0.000 abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 150000003839 salts Chemical class 0.000 abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 6
- 239000011574 phosphorus Substances 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000009835 boiling Methods 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- 229910019142 PO4 Inorganic materials 0.000 description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 9
- 239000010452 phosphate Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000011056 performance test Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229920001273 Polyhydroxy acid Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 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
- C02F5/12—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 nitrogen
- C02F5/125—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 nitrogen 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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
A composite phosphorus-free corrosion and scale inhibitor applied to a coke dry quenching waste heat boiler and a preparation method thereof are disclosed, wherein the scale inhibitor comprises the following components in parts by weight: 10-40 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 20-50 parts of sodium gluconate, 10-25 parts of N-isopropyl hydroxylamine, 10-30 parts of polyaspartic acid, 5-20 parts of glucoside, 5-20 parts of sodium hydroxide and 20-40 parts of ultrapure water. The agent is green and environment-friendly, effectively reduces the salt content increase of a boiler, avoids the influence of excessive use of the agent on the boiler, ensures that the conductivity of water rises by less than 20 mu s/cm after the agent is used, obviously reduces the times of boiler boiling, reduces the times of chemical cleaning, does not contain phosphorus, is green and environment-friendly, is easy to biodegrade after being discharged, does not produce secondary pollution, has efficient corrosion inhibition, scale inhibition, oxygen removal and easy degradation, and is suitable for being used in a dry quenching waste heat boiler.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a composite phosphorus-free corrosion and scale inhibitor applied to a coke dry quenching waste heat boiler and a preparation method thereof.
Background
The dry quenching waste heat boiler is generally a secondary high pressure boiler or a high pressure boiler, and is mainly equipment for recovering waste heat in coke dry quenching to generate steam, the water quality requirement of the boiler is high, ultrapure water is required to be used as make-up water, in order to inhibit corrosion and scaling phenomena in the operation of the boiler, a composite corrosion and scale inhibitor mainly comprising phosphate is generally added, but with the continuous operation of the equipment, the generation of phosphate scale is inevitable, scaling corrosion easily causes the explosion of boiler tubes in the boiler due to the accumulation and the moon, combustible components in circulating water are rapidly increased, the explosion of the whole closed circulating gas is caused, and serious safety accidents occur.
Although the composite corrosion and scale inhibitor mainly adopting phosphate is economical and practical, the generated defects can not be ignored, the phenomenon that phosphate is hidden easily occurs when a large amount of phosphate is used, the reason is that partial phosphate is separated out and scales, hidden danger is buried in a boiler, equipment loss and medicament waste can be caused by regular boiler boiling, the production cost is increased indirectly, and the phosphorus-based corrosion and scale inhibitor adopted at present has high phosphorus content in wastewater discharged, and environmental pollution is easily caused. In order to solve the problems, the composite corrosion and scale inhibitor mainly comprising phosphate is not suitable for a long time.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a phosphorus-free corrosion and scale inhibitor which does not contain phosphorus and can maintain the corrosion and scale inhibition effect for a long time, the agent is green and environment-friendly, the salt content increase of a boiler can be effectively reduced, the influence of excessive use of the agent on the boiler is avoided, the conductivity of water rises by less than 20 mu s/cm after the agent is used, the boiler boiling times are obviously reduced, the chemical cleaning times are effectively reduced, the agent does not contain phosphorus, is green and environment-friendly, is easy to biodegrade after being discharged, does not generate secondary pollution, has high-efficiency corrosion inhibition, scale inhibition, deoxidation and degradability, and is suitable for being used in a dry coke quenching waste heat boiler.
In order to achieve the purpose, the invention adopts the following technical scheme:
the composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler comprises the following components in parts by weight: 10-40 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 20-50 parts of sodium gluconate, 10-25 parts of N-isopropyl hydroxylamine, 10-30 parts of polyaspartic acid, 5-20 parts of glucoside, 5-20 parts of sodium hydroxide and 20-40 parts of ultrapure water.
The scale inhibitor comprises the following components in parts by weight: 20-30 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 25-40 parts of sodium gluconate, 13-20 parts of N-isopropyl hydroxylamine, 15-25 parts of polyaspartic acid, 7-15 parts of glucoside, 8-17 parts of sodium hydroxide and 20-40 parts of ultrapure water.
The sodium gluconate is a polyhydroxy acid type corrosion and scale inhibitor, is non-toxic and environment-friendly, has double functions of corrosion and scale inhibition, the corrosion inhibition effect of the sodium gluconate is increased along with the rise of temperature, and the sodium gluconate has excellent coordination capacity to ions such as iron, calcium, copper and the like in aqueous solution and has good descaling effect on salts formed by the ions. The sodium gluconate is matched with the polyaspartic acid and the hydroxypropyl trimethyl ammonium chloride chitosan for use, so that a good coordination and synergism effect can be presented.
The pH value of the polyaspartic acid is 9.5, the alkaline agent is a novel green water treatment agent, has the characteristics of no phosphorus, no toxicity, no pollution and complete biodegradation, is suitable for various industrial circulating cooling water and boiler water, particularly has strong chelating capacity on metal ions in the boiler water, has various functions of corrosion inhibition, scale inhibition and dispersion, and can play a role in protecting the dry quenching waste heat boiler in all aspects. The polyaspartic acid can be used in combination with various water treatment agents to play a role in coordination and synergism.
N-isopropyl hydroxylamine (IPHA) belongs to an alkaline medicament, is non-toxic, is a good deoxidant for removing dissolved oxygen, has better volatility, has a gas-liquid ratio of 1:4, and has obvious deoxidization and protection effects on boiler scale.
Glucoside (APG), a green surfactant with more comprehensive performance, strong compatibility, high surface activity, good ecological safety and intermiscibility, can disperse impurities in a boiler and impurities flocculated by hydroxypropyl trimethyl ammonium chloride chitosan in water, and effectively avoids deposition and scaling.
The sodium hydroxide is mainly used as a pH regulator, and the pH value of water is required to be over 9.0 when the dry quenching waste heat boiler operates, so the sodium hydroxide has the effect of regulating the pH value of a medicament and the pH value of boiler water.
The ultrapure water is the effluent of EDI high-purity water equipment, and mainly has the function of eliminating system pollution caused by water quality with more impurities as much as possible, so that the operation of the dry quenching waste heat boiler is more guaranteed.
The preparation method of the composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler comprises the following steps:
injecting ultrapure water into a pressure-bearing reaction kettle at room temperature, heating to 40-60 ℃, then carrying out vacuum-pumping treatment, exhausting air by adopting a direct-connected liquid ring vacuum pump, adding hydroxypropyl trimethyl ammonium chloride chitosan, sodium gluconate and N-isopropyl hydroxylamine through a reserved closed dosing port (vacuumized), mixing and stirring for no less than 30min, adding polyaspartic acid and glucoside after all the materials are dissolved, continuously stirring for no less than 1h, keeping the heating temperature at 40-60 ℃, finally adding a pH regulator sodium hydroxide, continuously stirring for no less than 30min, and naturally cooling to room temperature.
The limit vacuum pressure reaches 0.092-0.098 MPa.
The application of the corrosion and scale inhibitor in the coke dry quenching waste heat boiler can control the conductivity rise in water within 20 mu s/cm, relatively less salt phase is brought in by the complexing agent, the influence on the boiler is avoided, the traditional corrosion and scale inhibitor for the phosphate boiler continuously accumulates medicament residues in the boiler along with the advancing of time, more phosphate is accumulated, and the chemical cleaning of the boiler is finally carried out. The hydroxypropyl trimethyl ammonium chloride chitosan, the sodium gluconate, the N-isopropyl hydroxylamine, the polyaspartic acid and the glucoside adopted by the invention have short attenuation period, average attenuation of 50% in one day, mutual compatibility among the components, obvious coordination and synergism, high-efficiency corrosion inhibition, scale inhibition and oxygen removal, and can be suitable for a dry quenching waste heat boiler.
The components of the composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler are all of industrial purity, and in the preparation process, the invention adopts a vacuumizing production method to prevent oxygen in the air from entering the agent in the production process, so that the oxidation attenuation of the deoxidant N-isopropyl hydroxylamine in the preparation process is prevented, the activity of the deoxidant N-isopropyl hydroxylamine is ensured, and the deoxidization and protection performance of the composite agent is improved.
Compared with the prior art, the invention has the beneficial effects that:
1) after the composite phosphorus-free corrosion and scale inhibitor is used, the conductivity of the boiler water rises by less than 20 mu s/cm, the increase of salt in the boiler can be effectively reduced, the influence of excessive use of a medicament on the boiler is avoided, the times of chemical cleaning are indirectly reduced, and the cleaning cost is saved.
2) The composite phosphorus-free corrosion and scale inhibitor is phosphorus-free, green and environment-friendly, and after boiler water is discharged, the chemical in the water is easy to biodegrade, and secondary pollution is avoided.
3) The components of the composite phosphorus-free corrosion and scale inhibitor have good cooperativity and compatibility, and the compatibility between medicaments is good, and the composite phosphorus-free corrosion and scale inhibitor has high-efficiency corrosion inhibition, scale inhibition and oxygen removal.
4) The invention is particularly suitable for popularization and use in the coke dry quenching waste heat boiler.
5) The composite agent contains N-isopropyl hydroxylamine, so that the composite agent has the characteristic of deoxidization, and is used in a dry quenching waste heat boiler without singly using the deoxidization agent.
Detailed Description
The present invention will be described in detail with reference to examples, but it should be noted that the practice of the present invention is not limited to the following embodiments.
Example 1:
the composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler comprises the following components in percentage by weight: 26 parts, sodium gluconate: 34 parts of N-isopropylhydroxylamine: 18 parts of polyaspartic acid: 18 parts of glucoside: 12 parts, sodium hydroxide: 8 parts of ultrapure water: 30 parts of.
The preparation method of the composite scale and corrosion inhibition medicament of the embodiment specifically comprises the following operations:
injecting ultrapure water into a pressure-bearing reaction kettle at room temperature, heating to 45 ℃, then vacuumizing, exhausting air by using a direct-connected liquid ring vacuum pump, enabling the limit vacuum pressure to reach 0.095MPa, adding hydroxypropyl trimethyl ammonium chloride chitosan, sodium gluconate and N-isopropyl hydroxylamine through a reserved closed medicine adding port device (vacuumized), mixing and stirring for 30min, after all the materials are dissolved, adding polyaspartic acid and glucoside, continuously stirring for 1h, keeping the heating temperature at 50 ℃, finally adding a pH regulator sodium hydroxide, stirring for 30min, and naturally cooling to room temperature to obtain the product 1 #.
Example 2:
the composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler comprises the following components in percentage by weight: 22 parts and sodium gluconate: 38 parts of N-isopropylhydroxylamine: 13 parts of polyaspartic acid: 20 parts of glucoside: 7 parts of sodium hydroxide: 13 parts of ultrapure water: and 25 parts.
The preparation method of the composite scale and corrosion inhibition medicament of the embodiment specifically comprises the following operations:
injecting ultrapure water into a pressure-bearing reaction kettle at room temperature, heating to 60 ℃, then vacuumizing, exhausting air by using a direct-connected liquid ring vacuum pump, enabling the limit vacuum pressure to reach 0.097MPa, adding hydroxypropyl trimethyl ammonium chloride chitosan, sodium gluconate and N-isopropyl hydroxylamine through a reserved closed medicine adding port device (vacuumized), mixing and stirring for 30min, after all the materials are dissolved, adding polyaspartic acid and glucoside, continuously stirring for 1h, keeping the heating temperature at 55 ℃, finally adding a pH regulator sodium hydroxide, stirring for 30min, and naturally cooling to room temperature to obtain the product 2 #.
Example 3:
the composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler comprises the following components in percentage by weight: 30 parts of sodium gluconate: 27 parts of N-isopropylhydroxylamine: 15 parts of polyaspartic acid: 25 parts of glucoside: 15 parts of sodium hydroxide: 15 parts of ultrapure water: 28 parts.
The preparation method of the composite scale and corrosion inhibition medicament of the embodiment specifically comprises the following operations:
injecting ultrapure water into a pressure-bearing reaction kettle at room temperature, heating to 55 ℃, then carrying out vacuum pumping treatment, discharging air by adopting a direct-connected liquid ring vacuum pump, enabling the limit vacuum pressure to reach 0.093MPa, adding hydroxypropyl trimethyl ammonium chloride chitosan, sodium gluconate and N-isopropyl hydroxylamine through a reserved closed medicine adding port device (vacuumized), mixing and stirring for 30min, after all the materials are dissolved, adding polyaspartic acid and glucoside, continuously stirring for 1h, keeping the heating temperature at 55 ℃, finally adding a pH regulator sodium hydroxide, stirring for 30min, and naturally cooling to room temperature to obtain the product 3 #.
Experiment 1:
the composite phosphorus-free corrosion and scale inhibitor products 1#, 2#, and 3# of the above examples 1-3 were subjected to simulation experiments under the following limiting water quality conditions, wherein the pH value was 8.52, Cond 178 μ s/cm, and the total calcium hardness was 50mg/L (as CaCO)3Calculated as CaCO), calcium hardness 20mg/L3Meter), Cl-20mg/L and total alkalinity of 65mg/L (as CaCO)3Meter). The time is 14 days, ultrapure water is adopted for supplementing water, and a corrosion and scale inhibition performance test is carried out according to a dynamic evaluation method of performance of a boiler water treatment agent (HG/T3924-2007), and the results are shown in Table 1:
table 1 examples 1-3 product performance test results
The results in Table 1 show that the oxygen removal performance, corrosion inhibition rate and scale inhibition rate of products No. 1, No. 2 and No. 3 all meet the corrosion and scale inhibition requirements of industrial boilers, and the electric conductivity after the experiment rises by less than 20 mus/cm, which indicates that the salt brought into the water quality by the medicament is in a controllable range and meets the use requirements of the coke dry quenching waste heat boilers.
Experiment 2:
the composite phosphorus-free corrosion and scale inhibitor products 1#, 2#, and 3# of the above examples 1-3 were subjected to simulation experiments under the following limiting water quality conditions, wherein the pH value was 8.65, Cond 217 μ s/cm, and the total calcium hardness was 80mg/L (as CaCO)3Calculated as CaCO), calcium hardness of 40mg/L3Meter), Cl-40mg/L, total alkalinity 78mg/L (as CaCO)3Meter). The time is 14 days, and the corrosion and scale inhibition performance test is carried out according to dynamic evaluation method of boiler water treatment agent performance (HG/T3924-2007), and the results are shown in Table 2:
table 2 examples 1-3 product performance test results
The results in Table 2 show that the oxygen removal performance, corrosion inhibition rate and scale inhibition rate of products No. 1, No. 2 and No. 3 all meet the corrosion and scale inhibition requirements of industrial boilers, and the electric conductivity after the experiment rises by less than 20 mus/cm, which indicates that the salt brought into the water quality by the medicament is in a controllable range and meets the use requirements of the coke dry quenching waste heat boilers.
Experiment 3:
in the simulation experiment, the composite phosphorus-free corrosion and scale inhibitor product 3 has the best effect, the product 3# is selected to be subjected to an online experiment in a coke dry quenching waste heat boiler of a certain steel mill, and the water quality conditions are shown in the following table 3:
table 3: water quality condition for 3# product test
Under the water quality condition in the table 3, the operation time is 1 month, the conductivity in the water is detected every week, the temperature of each part of the boiler is tracked and recorded, and finally the test result is analyzed, so that the boiler operates well, no temperature alarm is given once, the corrosion rate of the carbon steel is 0.0217mm/a, the average dissolved oxygen is 6 mu g/L, the average conductivity in the water of the boiler is 51.4 mu s/cm, the requirement that the conductivity rises to be less than 20 mu s/cm is met, and the using effect in the boiler is good.
Claims (4)
1. The composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler is characterized by comprising the following components in parts by weight: 10-40 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 20-50 parts of sodium gluconate, 10-25 parts of N-isopropyl hydroxylamine, 10-30 parts of polyaspartic acid, 5-20 parts of glucoside, 5-20 parts of sodium hydroxide and 20-40 parts of ultrapure water.
2. The composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler of claim 1, which is characterized by comprising the following components in parts by weight: 20-30 parts of hydroxypropyl trimethyl ammonium chloride chitosan, 25-40 parts of sodium gluconate, 13-20 parts of N-isopropyl hydroxylamine, 15-25 parts of polyaspartic acid, 7-15 parts of glucoside, 8-17 parts of sodium hydroxide and 20-40 parts of ultrapure water.
3. The preparation method of the composite phosphorus-free corrosion and scale inhibitor applied to the dry quenching waste heat boiler, according to claim 1 or 2, is characterized by comprising the following steps:
injecting ultrapure water into a pressure-bearing type reaction kettle, heating to 40-60 ℃, then carrying out vacuum pumping treatment, adding hydroxypropyl trimethyl ammonium chloride chitosan, sodium gluconate and N-isopropyl hydroxylamine through a reserved closed medicine adding port, mixing and stirring, adding polyaspartic acid and glucoside for continuous stirring after all the materials are dissolved, keeping the heating temperature at 40-60 ℃, finally adding a pH regulator sodium hydroxide, continuing stirring, and naturally cooling to room temperature.
4. The preparation method of the composite phosphorus-free corrosion and scale inhibitor applied to the coke dry quenching waste heat boiler, as claimed in claim 3, wherein the limit vacuum pressure reaches 0.092-0.098 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091263.XA CN112299575B (en) | 2020-10-13 | 2020-10-13 | Composite phosphorus-free corrosion and scale inhibitor applied to dry quenching waste heat boiler and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091263.XA CN112299575B (en) | 2020-10-13 | 2020-10-13 | Composite phosphorus-free corrosion and scale inhibitor applied to dry quenching waste heat boiler and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112299575A true CN112299575A (en) | 2021-02-02 |
| CN112299575B CN112299575B (en) | 2022-11-15 |
Family
ID=74489711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011091263.XA Active CN112299575B (en) | 2020-10-13 | 2020-10-13 | Composite phosphorus-free corrosion and scale inhibitor applied to dry quenching waste heat boiler and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112299575B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152902A (en) * | 1991-03-19 | 1992-10-06 | Donlar Corporation | Polyaspartic acid as a calcium carbonate and a calcium phosphate inhibitor |
| CN105502698A (en) * | 2014-10-14 | 2016-04-20 | 中国石油化工股份有限公司 | Composite scale and corrosion inhibitor and application thereof in circulating cooling water treatment |
| CN106277379A (en) * | 2016-09-30 | 2017-01-04 | 武汉理工大学 | A kind of environment-friendly chitosan compound corrosion inhibiting and descaling agent and preparation method thereof |
| CN108862643A (en) * | 2018-06-28 | 2018-11-23 | 芜湖市棠华建材科技有限公司 | The antisludging agent of boiler recirculated water |
| CN109133392A (en) * | 2018-10-17 | 2019-01-04 | 何云飞 | A kind of boiler treatment agent of green low-phosphorous environment-friendly anti-scale descaling anti-corrosion deoxygenation |
-
2020
- 2020-10-13 CN CN202011091263.XA patent/CN112299575B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152902A (en) * | 1991-03-19 | 1992-10-06 | Donlar Corporation | Polyaspartic acid as a calcium carbonate and a calcium phosphate inhibitor |
| CN105502698A (en) * | 2014-10-14 | 2016-04-20 | 中国石油化工股份有限公司 | Composite scale and corrosion inhibitor and application thereof in circulating cooling water treatment |
| CN106277379A (en) * | 2016-09-30 | 2017-01-04 | 武汉理工大学 | A kind of environment-friendly chitosan compound corrosion inhibiting and descaling agent and preparation method thereof |
| CN108862643A (en) * | 2018-06-28 | 2018-11-23 | 芜湖市棠华建材科技有限公司 | The antisludging agent of boiler recirculated water |
| CN109133392A (en) * | 2018-10-17 | 2019-01-04 | 何云飞 | A kind of boiler treatment agent of green low-phosphorous environment-friendly anti-scale descaling anti-corrosion deoxygenation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112299575B (en) | 2022-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109133392B (en) | Green low-phosphorus environment-friendly boiler treatment agent with scale inhibition, descaling, corrosion prevention and oxygen removal functions | |
| EP3106439B1 (en) | Scale removal method for steam generating facilities | |
| CN112093918B (en) | Humic acid phosphorus-free corrosion and scale inhibitor and preparation method thereof | |
| CN104591413A (en) | Corrosion and scale inhibitor for blast furnace closed-loop circulating water and preparation method of inhibitor | |
| CN104556427A (en) | Composite efficient corrosion and scale inhibitor for ammonia still water treatment | |
| CN105036363B (en) | A kind of composite corrosion inhibitor of suitable demineralized water and preparation method | |
| CN109293015A (en) | A kind of industrial circulation water treatment medicament | |
| JPH0623370A (en) | Carbohydrazone for use as oxygen removing agent for boiler water and method for its use | |
| CN112299575B (en) | Composite phosphorus-free corrosion and scale inhibitor applied to dry quenching waste heat boiler and preparation method thereof | |
| CN108585228A (en) | A kind of algal polysaccharides efficient boiler water modifier | |
| KR20040053571A (en) | Method of water-treatment for preventing corrosion anc scale of metal in cooling system | |
| CN111233178A (en) | Phosphorus-free composite cylinder cleaning agent for low-pressure boiler and preparation method thereof | |
| CN113121024A (en) | Chlorine-resistant corrosion and scale inhibitor and preparation method and application thereof | |
| CN105271435A (en) | Production technology for preparing polyferric chloride coagulant from seamless steel pipe acid-washing waste liquid | |
| CN103922491A (en) | Energy-saving scale inhibiting and removing anticorrosion compound medicament for steam boiler and preparation method of medicament | |
| CN109851095B (en) | Method for treating tail end COD of high-salt hydroxypropyl methyl cellulose wastewater by Fenton method | |
| CN104649422A (en) | Composite scale and corrosion inhibitor applied to boiler closed circulating water system and preparation method thereof | |
| JP2848672B2 (en) | High-temperature water-based corrosion inhibitor | |
| JP5691697B2 (en) | Water treatment method for steam generating equipment | |
| CN106927583A (en) | A kind of corrosion inhibiting and descaling agent of high-performance solid high temperature resistance high pressure | |
| CN111235580A (en) | Composite closed circulating water phosphorus-free corrosion inhibitor and preparation method thereof | |
| JP5402669B2 (en) | Water treatment method for boiler water system | |
| JP2016065291A (en) | Corrosion inhibitor and corrosion control method for boiler water system | |
| CN111470554A (en) | Composite water treatment agent for boiler | |
| CN113620440A (en) | Corrosion and scale inhibitor for scale precipitation and removal of oil extraction and transportation equipment and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 114000 Dadaowan Industrial Zone A06-8, Anshan City, Liaoning Province Applicant after: Angang Litian (Anshan) water treatment Co.,Ltd. Address before: 114000 Dadaowan Industrial Zone A06-8, Anshan City, Liaoning Province Applicant before: ANGANG BK GIULINI WATER TREATMENT CO.,LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |