CN113754081A - Non-phosphorus environment-friendly corrosion and scale inhibitor for cooling water and preparation method thereof - Google Patents
Non-phosphorus environment-friendly corrosion and scale inhibitor for cooling water and preparation method thereof Download PDFInfo
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- CN113754081A CN113754081A CN202111119198.1A CN202111119198A CN113754081A CN 113754081 A CN113754081 A CN 113754081A CN 202111119198 A CN202111119198 A CN 202111119198A CN 113754081 A CN113754081 A CN 113754081A
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- reaction kettle
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F5/105—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 combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a phosphorus-free environment-friendly corrosion and scale inhibitor for cooling water and a preparation method thereof. The corrosion and scale inhibitor does not contain phosphorus in the formula, belongs to a high-efficiency environment-friendly water treatment agent, mainly comprises sodium gluconate, polymaleic acid, zinc salt, binary copolymer, fluorescent tracer and the like, meets the environment-friendly emission standard, has excellent corrosion and scale inhibition performance, and is suitable for an online intelligent dosing control system.
Description
Technical Field
The invention belongs to the field of chemical industry, and particularly relates to a phosphorus-free environment-friendly corrosion and scale inhibitor for cooling water and a preparation method thereof.
Background
After the circulating cooling water is recycled, the concentration of metal ions such as calcium, magnesium and the like in the water is concentrated due to water evaporation, and the content is greatly increased, so that insoluble salts such as: calcium carbonate, magnesium carbonate, calcium phosphate, calcium sulfate and other inorganic scales, and because the cooling water is open, the oxygen dissolved in the water is sufficient, and the pH value is: 7-9, various corrosion forms to metal materials in the system exist, corrosion perforation of equipment pipes and the like are caused, the service life of the equipment is shortened, and therefore, the control of scaling and corrosion of the circulating cooling water is extremely important for a production device.
At present, organic phosphorus scale and corrosion inhibitors such as hydroxyethylidene diphosphate, phosphonic acid butane tricarboxylic acid and the like are commonly used, and the problems of eutrophication of water bodies and environmental hazard of mass propagation of algae are caused after a large amount of phosphorus is discharged, so that good social benefit and economic benefit can be brought by developing efficient phosphorus-free environment-friendly water treatment agents.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention aims to provide a phosphorus-free environment-friendly corrosion and scale inhibitor containing a fluorescent tracer and capable of being tracked and monitored on line and a preparation method thereof.
(II) technical scheme
In order to prepare the scale inhibitor, the invention provides the following technical scheme:
a phosphorus-free environment-friendly corrosion and scale inhibitor for cooling water comprises 10-20% of sodium gluconate, 7-15% of polymaleic acid, 1-8% of zinc chloride, 10-20% of acrylic acid-acrylate sulfonate binary copolymer, 0.01-0.2% of pyrenetetrasulfonic acid tetrasodium salt and 50-60% of tap water, and the preparation method comprises the following steps:
preferably, the industrial grade of the sodium gluconate is not less than 96%, the industrial grade of the polymaleic acid is not less than 30%, the industrial grade of the zinc chloride is not less than 99%, the industrial grade of the acrylic acid-acrylate sulfonate binary copolymer is not less than 30%, and the industrial grade of the pyrenetetrasulfonic acid tetrasodium salt is not less than 99%.
Preferably, tap water in the raw materials can be preferentially replaced by deionized water.
A preparation method of a non-phosphorus environment-friendly corrosion and scale inhibitor for cooling water,
(1) material picking: taking sodium gluconate, polymaleic acid, zinc chloride, acrylic acid-acrylate sulfonate binary copolymer, pyrenetetrasulfonic acid tetrasodium salt and tap water;
(2) feeding: sucking tap water into a 3T reaction kettle, keeping the temperature at 30-40 ℃, and starting stirring; putting zinc chloride into a reaction kettle, putting pyrenetetrasulfonic acid tetrasodium salt into the reaction kettle, putting sodium gluconate into the reaction kettle, stirring, sucking the acrylic acid-acrylate sulfonate binary copolymer into the reaction kettle after complete dissolution, sucking polymaleic acid into the reaction kettle, stirring for 20-40 minutes, and ensuring uniform stirring and mixing;
(3) standing: standing for 20-35 min, cooling to normal temperature, sampling, checking, and separating out after no precipitate exists;
(4) and (3) finished product: filtering and packaging to obtain the finished product.
(III) advantageous effects
The invention comprises sodium gluconate, polymaleic acid, zinc chloride, acrylic acid-acrylate sulfonate binary copolymer, pyrenetetrasulfonic acid tetrasodium salt and tap water.
The sodium gluconate has corrosion and scale inhibition functions, is an organic matter and has a chemical formula of C6H11NaO7The sodium gluconate has wide industrial application, and can be used as a high-efficiency chelating agent and a steel surface cleaning agent in the industries of metal surface treatment, water treatment and the like.
Polymaleic acid is a low molecular weight polyelectrolyte, is easily soluble in water, has high chemical stability and thermal stability, and has a decomposition temperature of over 330 ℃. There is a clear solubility limiting effect at high temperatures (<350 ℃) and high pH. The polymaleic acid is suitable for alkaline water or is compounded with other medicines for use. The polymaleic acid still has good scale inhibition and dispersion effects on carbonate at the temperature of below 300 ℃, and the scale inhibition time can reach 100 h. The polymaleic acid has a certain corrosion inhibition effect, and the compounding effect with the zinc salt is better.
The zinc chloride is an inorganic salt with a chemical formula of ZnCl2It has wide application range in industry, and is mainly used as corrosion inhibitor in water treatment.
The acrylic acid-acrylate sulfonate binary copolymer mainly has a dispersing effect, is obtained by copolymerizing acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid, contains a carboxylic group with good scale inhibition and dispersion performance and a sulfonic group with strong polarity in a molecular structure, can improve the calcium tolerance, has a remarkable scale inhibition effect on calcium phosphate, calcium carbonate, zinc scale and the like in water, and has excellent dispersion performance. The compound is compounded with organic phosphine, and the synergistic effect is obvious. Is particularly suitable for water with high pH value, high alkalinity and high hardness, and is one of the most ideal scale inhibition and dispersion agents for realizing high concentration multiple operation.
The pyrenetetrasulfonic acid tetrasodium salt is mainly used as a fluorescent tracer, is an excellent fluorescent tracer, is mixed with various water treatment agents to form a fluorescent water treatment agent, and can be widely used for various industrial circulating water systems.
The components have synergistic effect, can greatly relieve and prevent the problems of scaling and corrosion of cooling water caused by concentration, are used for monitoring the concentration of the medicament on line and accurately adding the medicament, and are favorable for long-term, efficient and stable operation of a system. The corrosion and scale inhibitor does not contain phosphorus in the formula, belongs to a high-efficiency environment-friendly water treatment agent, mainly comprises sodium gluconate, polymaleic acid, zinc salt, binary copolymer, fluorescent tracer and the like, meets the environment-friendly emission standard, has excellent corrosion and scale inhibition performance, and is suitable for an online intelligent dosing control system.
Drawings
FIG. 1 is a schematic view of corrosion testing according to the present invention
FIG. 2 is a schematic view of the scale inhibition test of the present invention
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. With reference to fig. 1, the specific implementation is as follows.
Example 1:
(1) material picking: taking 150kg of sodium gluconate, 100kg of polymaleic acid, 40kg of zinc chloride, 150kg of acrylic acid-acrylate sulfonate binary copolymer, 1kg of pyrenetetrasulfonic acid tetrasodium salt and 559kg of tap water;
(2) feeding: sucking tap water into a 3T reaction kettle, keeping the temperature at 30-40 ℃, and starting stirring; putting zinc chloride into a reaction kettle, putting pyrenetetrasulfonic acid tetrasodium salt into the reaction kettle, putting sodium gluconate into the reaction kettle, stirring, sucking the acrylic acid-acrylate sulfonate binary copolymer into the reaction kettle after complete dissolution, sucking polymaleic acid into the reaction kettle, stirring for 30 minutes, and ensuring uniform stirring and mixing;
(3) standing: standing for 20-35 min, cooling to normal temperature, sampling, checking, and separating out after no precipitate exists;
(4) and (3) finished product: filtering and packaging to obtain the finished product.
As shown in fig. 1 and 2, the number 1 is the results of the corrosion rate test and the scale inhibition rate test of the product of the present invention, and it can be seen from the figure that compared with other products of number 2#, 3#, 4# and 5#, the corrosion rate of the present invention is 0.016mm/a, the corrosion control is the best, the calcium dissolution rate is 98.2%, the scale inhibition rate is 96.2%, and the scale inhibition control is the best.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The phosphorus-free environment-friendly corrosion and scale inhibitor for cooling water is characterized by comprising 10-20% of sodium gluconate, 7-15% of polymaleic acid, 1-8% of zinc chloride, 10-20% of acrylic acid-acrylate sulfonate binary copolymer, 0.01-0.2% of pyrenetetrasulfonic acid tetrasodium salt and 50-60% of tap water, wherein the preparation method comprises the following steps.
2. The phosphorus-free environment-friendly corrosion and scale inhibitor for cooling water as claimed in claim 1, wherein the industrial grade of sodium gluconate is not less than 96%, the industrial grade of polymaleic acid is not less than 30%, the industrial grade of zinc chloride is not less than 99%, the industrial grade of acrylic acid-acrylate sulfonate binary copolymer is not less than 30%, and the industrial grade of pyrenetetrasulfonic acid tetrasodium salt is not less than 99%.
3. The phosphorus-free environment-friendly corrosion and scale inhibitor for cooling water as claimed in claim 1, wherein tap water in the raw materials can be replaced by deionized water preferentially.
4. A preparation method of a non-phosphorus environment-friendly corrosion and scale inhibitor for cooling water, which is characterized in that,
(1) material picking: taking sodium gluconate, polymaleic acid, zinc chloride, acrylic acid-acrylate sulfonate binary copolymer, pyrenetetrasulfonic acid tetrasodium salt and tap water;
(2) feeding: sucking tap water into a 3T reaction kettle, keeping the temperature at 30-40 ℃, and starting stirring; putting zinc chloride into a reaction kettle, putting pyrenetetrasulfonic acid tetrasodium salt into the reaction kettle, putting sodium gluconate into the reaction kettle, stirring, sucking the acrylic acid-acrylate sulfonate binary copolymer into the reaction kettle after complete dissolution, sucking polymaleic acid into the reaction kettle, stirring for 20-40 minutes, and ensuring uniform stirring and mixing;
(3) standing: standing for 20-35 min, cooling to normal temperature, sampling, checking, and separating out after no precipitate exists;
(4) and (3) finished product: filtering and packaging to obtain the finished product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115449783A (en) * | 2022-09-21 | 2022-12-09 | 岳阳隆兴实业有限公司 | Circulating water phosphorus-free prefilming agent and use method thereof |
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