CN111115855A - Non-phosphorus scale inhibitor for circulating water and preparation method and application thereof - Google Patents
Non-phosphorus scale inhibitor for circulating water and preparation method and application thereof Download PDFInfo
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- CN111115855A CN111115855A CN201911287451.7A CN201911287451A CN111115855A CN 111115855 A CN111115855 A CN 111115855A CN 201911287451 A CN201911287451 A CN 201911287451A CN 111115855 A CN111115855 A CN 111115855A
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- Prior art keywords
- acid
- circulating water
- phosphorus
- scale inhibitor
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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
-
- 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
Abstract
The invention discloses a phosphorus-free scale inhibitor for circulating water, which comprises the following raw materials in percentage by mass: 10-20% of maleic acid-acrylic acid copolymer, 20-30% of copolymer of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid, 1-5% of hydrochloric acid, 10-20% of succinic acid, 5-8% of polyaspartic acid and the balance of deionized water, wherein the sum of the mass percentages of all the raw materials is 100%. The phosphorus-free scale inhibitor for circulating water can be used for inhibiting scale of circulating water, has a good scale inhibition effect, saves scale inhibition time, and improves the utilization rate and the circulating efficiency of the circulating water; in addition, the phosphorus-free scale inhibitor for circulating water disclosed by the invention does not contain components such as phosphorus and the like, and is used for inhibiting the scale of the circulating water, and the sewage discharged into the environment does not contain phosphorus, so that the water body is not polluted, and the environment is protected.
Description
Technical Field
The invention relates to the field of scale inhibitors, and particularly relates to a phosphorus-free scale inhibitor for circulating water and a preparation method and application thereof.
Background
The circulating water mainly comprises industrial circulating water and household circulating water, and the main purpose is to save water. Industrial circulating water is mainly used in cooling water systems, and is also called circulating cooling water. Because the industrial cooling water accounts for more than 90 percent of the total water consumption. The household circulating water is mainly used on a water heater.
The circulating cooling water is divided into a closed type (closed type) and an open type. In a closed cooling water system, cooling water is not exposed to air, water loss is little, and the contents of various minerals and ions in the water are not changed generally. In the open circulating water system, the water is re-cooled by the cooling tower, so that the cooling water is contacted with air in the recycling process, part of water is evaporated and lost when passing through the cooling tower, and the content of various minerals and ions in the water is concentrated and increased.
The circulating water consists of a circulating pump, a control system, a one-way valve and the like, and the circulating water, the water heater, the hot water main pipe and the hot water return pipe form a complete hot water circulating system; the working principle is that a control system gives a signal to a circulating pump, the circulating pump drives water to circulate inside to start a water heater to heat, the water heater stops working when a set time or temperature is reached, and existing hot water is started at a hot water using point.
However, the currently used scale inhibitors for circulating water have the following problems:
1. the scale inhibition effect of the scale inhibitor for circulating water is not ideal;
2. the scale inhibitor for circulating water contains phosphorus, and after the scale inhibitor is used for inhibiting the scale of the circulating water, the phosphorus content in sewage discharged into the environment is over standard, so that a water body is polluted and is not environment-friendly.
Based on the situation, the invention provides a phosphorus-free scale inhibitor for circulating water and a preparation method and application thereof, and the problems can be effectively solved.
Disclosure of Invention
The invention aims to provide a phosphorus-free scale inhibitor for circulating water and a preparation method and application thereof. The phosphorus-free scale inhibitor for circulating water disclosed by the invention is prepared by selecting raw materials and optimizing the content of each raw material, and the prepared phosphorus-free scale inhibitor for circulating water can be used for inhibiting scale of circulating water, is good in scale inhibition effect, saves scale inhibition time, and improves the utilization rate and circulation efficiency of circulating water; in addition, the phosphorus-free scale inhibitor for circulating water disclosed by the invention does not contain components such as phosphorus and the like, and is used for inhibiting the scale of the circulating water, and the sewage discharged into the environment does not contain phosphorus, so that the water body is not polluted, and the environment is protected.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a non-phosphorus scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
10-20% of maleic acid-acrylic acid copolymer,
20-30% of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
1-5% of hydrochloric acid,
10-20% of succinic acid,
5-8% of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
The phosphorus-free scale inhibitor for circulating water disclosed by the invention is prepared by selecting raw materials and optimizing the content of each raw material, and the prepared phosphorus-free scale inhibitor for circulating water can be used for inhibiting scale of circulating water, is good in scale inhibition effect, saves scale inhibition time, and improves the utilization rate and circulation efficiency of circulating water; in addition, the phosphorus-free scale inhibitor for circulating water disclosed by the invention does not contain components such as phosphorus and the like, and is used for inhibiting the scale of the circulating water, and the sewage discharged into the environment does not contain phosphorus, so that the water body is not polluted, and the environment is protected.
Preferably, the phosphorus-free scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
14-16% of maleic acrylic acid copolymer,
23-27% of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
2.5 to 3.5 percent of hydrochloric acid,
13-16% of succinic acid,
6.5 to 7.5 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
Preferably, the phosphorus-free scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
15 percent of maleic acrylic acid copolymer,
25 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
3 percent of hydrochloric acid,
14.5 percent of succinic acid,
7 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
Preferably, the phosphorus-free scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
15.3 percent of maleic acrylic acid copolymer,
25.2 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
2.9 percent of hydrochloric acid,
15.5 percent of succinic acid,
6.8 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
Preferably, the mole ratio of the monomer units of the maleic acid-acrylic acid copolymer, namely maleic anhydride and acrylic acid, is 1: 2.3 to 2.6.
Preferably, the molar ratio of the monomer units in the copolymer of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid to the monomer units of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid is 1: 0.45 to 0.65.
The invention also provides a preparation method of the phosphorus-free scale inhibitor for circulating water, which comprises the following steps:
A. weighing corresponding raw materials according to the raw material composition of the phosphorus-free scale inhibitor for circulating water for later use;
B. sequentially adding weighed deionized water and maleic acid-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrochloric acid, succinic acid and polyaspartic acid;
C. stirring uniformly, and continuing stirring at room temperature for more than 30 min;
D. filtering the mixture by using a 0.25 micron filter, packaging the filtered mixture, and placing the packaged mixture in a heat preservation chamber at the temperature of 25 +/-2 ℃ for heat preservation for more than 20 hours to obtain the phosphorus-free scale inhibitor for circulating water.
The invention also provides application of the phosphorus-free scale inhibitor for circulating water in scale inhibition of circulating water.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the phosphorus-free scale inhibitor for circulating water disclosed by the invention is prepared by selecting raw materials and optimizing the content of each raw material, and the prepared phosphorus-free scale inhibitor for circulating water can be used for inhibiting scale of circulating water, is good in scale inhibition effect, saves scale inhibition time, and improves the utilization rate and circulation efficiency of circulating water; in addition, the phosphorus-free scale inhibitor for circulating water disclosed by the invention does not contain components such as phosphorus and the like, and is used for inhibiting the scale of the circulating water, and the sewage discharged into the environment does not contain phosphorus, so that the water body is not polluted, and the environment is protected.
The preparation method has simple process and simple and convenient operation, and saves manpower and equipment cost.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a non-phosphorus scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
14 percent of maleic acrylic acid copolymer,
27 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
2.5 percent of hydrochloric acid,
13 percent of succinic acid,
6.5 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
In this example, the molar ratio of the monomer units maleic anhydride and acrylic acid in the maleic acrylic copolymer was 1: 2.3.
in this example, the molar ratio of the monomer units acrylic acid to 2-acrylamido-2-methylpropanesulfonic acid in the copolymer of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid was 1: 0.45.
in this embodiment, the preparation method of the phosphorus-free scale inhibitor for circulating water includes the following steps:
A. weighing corresponding raw materials according to the raw material composition of the phosphorus-free scale inhibitor for circulating water for later use;
B. sequentially adding weighed deionized water and maleic acid-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrochloric acid, succinic acid and polyaspartic acid;
C. stirring uniformly, and continuing stirring at room temperature for more than 30 min;
D. filtering the mixture by using a 0.25 micron filter, packaging the filtered mixture, and placing the packaged mixture in a heat preservation chamber at the temperature of 25 +/-2 ℃ for heat preservation for more than 20 hours to obtain the phosphorus-free scale inhibitor for circulating water.
Example 2:
a non-phosphorus scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
16 percent of maleic acrylic acid copolymer,
23 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
3.5 percent of hydrochloric acid,
16 percent of succinic acid,
7.5 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
In this example, the molar ratio of the monomer units maleic anhydride and acrylic acid in the maleic acrylic copolymer was 1: 2.6.
in this example, the molar ratio of the monomer units acrylic acid to 2-acrylamido-2-methylpropanesulfonic acid in the copolymer of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid was 1: 0.65.
in this embodiment, the preparation method of the phosphorus-free scale inhibitor for circulating water includes the following steps:
A. weighing corresponding raw materials according to the raw material composition of the phosphorus-free scale inhibitor for circulating water for later use;
B. sequentially adding weighed deionized water and maleic acid-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrochloric acid, succinic acid and polyaspartic acid;
C. stirring uniformly, and continuing stirring at room temperature for more than 30 min;
D. filtering the mixture by using a 0.25 micron filter, packaging the filtered mixture, and placing the packaged mixture in a heat preservation chamber at the temperature of 25 +/-2 ℃ for heat preservation for more than 20 hours to obtain the phosphorus-free scale inhibitor for circulating water.
Example 3:
a non-phosphorus scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
15 percent of maleic acrylic acid copolymer,
25 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
3 percent of hydrochloric acid,
14.5 percent of succinic acid,
7 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
In this example, the molar ratio of the monomer units maleic anhydride and acrylic acid in the maleic acrylic copolymer was 1: 2.45.
in this example, the molar ratio of the monomer units acrylic acid to 2-acrylamido-2-methylpropanesulfonic acid in the copolymer of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid was 1: 0.55.
in this embodiment, the preparation method of the phosphorus-free scale inhibitor for circulating water includes the following steps:
A. weighing corresponding raw materials according to the raw material composition of the phosphorus-free scale inhibitor for circulating water for later use;
B. sequentially adding weighed deionized water and maleic acid-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrochloric acid, succinic acid and polyaspartic acid;
C. stirring uniformly, and continuing stirring at room temperature for more than 30 min;
D. filtering the mixture by using a 0.25 micron filter, packaging the filtered mixture, and placing the packaged mixture in a heat preservation chamber at the temperature of 25 +/-2 ℃ for heat preservation for more than 20 hours to obtain the phosphorus-free scale inhibitor for circulating water.
Example 4:
a non-phosphorus scale inhibitor for circulating water comprises the following raw materials in percentage by mass:
15.3 percent of maleic acrylic acid copolymer,
25.2 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
2.9 percent of hydrochloric acid,
15.5 percent of succinic acid,
6.8 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
In this example, the molar ratio of the monomer units maleic anhydride and acrylic acid in the maleic acrylic copolymer was 1: 2.52.
in this example, the molar ratio of the monomer units acrylic acid to 2-acrylamido-2-methylpropanesulfonic acid in the copolymer of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid was 1: 0.53.
in this embodiment, the preparation method of the phosphorus-free scale inhibitor for circulating water includes the following steps:
A. weighing corresponding raw materials according to the raw material composition of the phosphorus-free scale inhibitor for circulating water for later use;
B. sequentially adding weighed deionized water and maleic acid-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrochloric acid, succinic acid and polyaspartic acid;
C. stirring uniformly, and continuing stirring at room temperature for more than 30 min;
D. filtering the mixture by using a 0.25 micron filter, packaging the filtered mixture, and placing the packaged mixture in a heat preservation chamber at the temperature of 25 +/-2 ℃ for heat preservation for more than 20 hours to obtain the phosphorus-free scale inhibitor for circulating water.
The following performance tests on the phosphorus-free scale inhibitor for circulating water and the common scale inhibitor obtained in examples 1 to 4 of the present invention show that the test results are shown in table 1 below:
TABLE 1
As can be seen from the above table, the phosphorus-free scale inhibitor for circulating water of the present invention has the following advantages: compared with the common scale inhibitor, the scale inhibitor has higher scale inhibition rate on circulating water and better scale inhibition effect; and the phosphorus content is low and is far lower than that of the common scale inhibitor.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (8)
1. A phosphorus-free scale inhibitor for circulating water is characterized by comprising the following raw materials in percentage by mass:
10-20% of maleic acid-acrylic acid copolymer,
20-30% of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
1-5% of hydrochloric acid,
10-20% of succinic acid,
5-8% of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
2. The phosphorus-free scale inhibitor for circulating water of claim 1, which is characterized by comprising the following raw materials in percentage by mass:
14-16% of maleic acrylic acid copolymer,
23-27% of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
2.5 to 3.5 percent of hydrochloric acid,
13-16% of succinic acid,
6.5 to 7.5 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
3. The phosphorus-free scale inhibitor for circulating water of claim 1, which is characterized by comprising the following raw materials in percentage by mass:
15 percent of maleic acrylic acid copolymer,
25 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
3 percent of hydrochloric acid,
14.5 percent of succinic acid,
7 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
4. The phosphorus-free scale inhibitor for circulating water of claim 1, which is characterized by comprising the following raw materials in percentage by mass:
15.3 percent of maleic acrylic acid copolymer,
25.2 percent of copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid,
2.9 percent of hydrochloric acid,
15.5 percent of succinic acid,
6.8 percent of polyaspartic acid,
The balance of deionized water, and the sum of the mass percentages of all the raw materials is 100%.
5. The phosphorus-free scale inhibitor for circulating water according to claim 1, wherein the molar ratio of monomer units of maleic anhydride and acrylic acid in the maleic acrylic acid copolymer is 1: 2.3 to 2.6.
6. The phosphorus-free scale inhibitor for circulating water according to claim 1, wherein the molar ratio of the monomer units of the copolymer of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid to the monomer units of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid is 1: 0.45 to 0.65.
7. The preparation method of the phosphorus-free scale inhibitor for circulating water according to any one of claims 1 to 6, which comprises the following steps:
A. weighing corresponding raw materials according to the raw material composition of the phosphorus-free scale inhibitor for circulating water for later use;
B. sequentially adding weighed deionized water and maleic acid-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrochloric acid, succinic acid and polyaspartic acid;
C. stirring uniformly, and continuing stirring at room temperature for more than 30 min;
D. filtering the mixture by using a 0.25 micron filter, packaging the filtered mixture, and placing the packaged mixture in a heat preservation chamber at the temperature of 25 +/-2 ℃ for heat preservation for more than 20 hours to obtain the phosphorus-free scale inhibitor for circulating water.
8. The use of the phosphorus-free scale inhibitor for circulating water according to any one of claims 1 to 6 in scale inhibition of circulating water.
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Cited By (1)
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| CN112320976A (en) * | 2020-08-31 | 2021-02-05 | 嘉兴沃特泰科环保科技股份有限公司 | Phosphorus-free scale inhibitor for industrial circulating water and preparation method and application thereof |
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| CN112320976A (en) * | 2020-08-31 | 2021-02-05 | 嘉兴沃特泰科环保科技股份有限公司 | Phosphorus-free scale inhibitor for industrial circulating water and preparation method and application thereof |
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Application publication date: 20200508 |