Organic corrosion and scale inhibition water treatment agent

Abstract

The invention discloses an organic corrosion-inhibiting and scale-inhibiting water treatment agent. The agent comprises the following components in parts by weight: 20-60 parts of corrosion inhibitor, 10-30 parts of scale inhibitor, 2-8 parts of penetrant, 3-10 parts of acrylic acid-maleic acid copolymer, 1-3 parts of benzotriazole, and 10-50 parts of water. The organic corrosion-inhibiting and scale-inhibiting water treatment agent prepared by the invention is suitable for treating boiler water, has no corrosion to the inside of the boiler, increases the critical salt content of boiler water, and reduces the amount of sewage discharged; effectively inhibits the formation of scale and prevents the generation of scaling problems in furnace tubes; can effectively eliminate foam and reduce the entrainment of boiler water gas foam; improves the heat exchange effect, saves energy, and reduces the generation of sediment and pickling.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to an organic corrosion and scale inhibition water treatment agent. Background Art

[0002] With the continuous development of social economy, boilers are widely used in production and life. Water is the power source for boiler operation. Due to inadequate water treatment, the boiler water quality does not meet the national standard requirements, and serious scaling and accidents often occur. Industrial boiler water is generally tap water or groundwater. These seemingly clear and transparent waters contain many impurities. During the operation of the boiler, scale with poor thermal conductivity will be generated, corroding the boiler metal and seriously endangering the operation of the boiler. Poor water quality can mainly cause three types of corrosion: oxygen corrosion, caustic embrittlement, and under-scale corrosion. Since iron ions are oxidized to form low-valent iron compounds and high-valent iron-containing chemicals in the scale, this scale will further accelerate the corrosion of iron under the scale layer after it is formed, which is extremely harmful. When the content of dissolved steam and water solids in the water is too high, co-evaporation will occur, causing serious steam pollution and making it unusable. At the same time, it will affect the work of the water level gauge and fail to accurately display the boiler water level, so the boiler's water level automatic control system will not work.

[0003] Water treatment for industrial boilers is generally classified into external water treatment and internal water treatment. External water treatment refers to the use of water treatment equipment to remove impurities such as hardness, salt, dissolved oxygen, etc. in the raw water before it enters the boiler, so that the feed water meets the national water quality standards. Common water treatment equipment includes sodium ion exchange softening equipment, ion exchange desalination equipment, reverse osmosis water purification equipment, thermal deoxygenation equipment, etc. Internal water treatment refers to the use of chemical water treatment agents to enter the boiler along with the boiler feed water, and react chemically with impurities in the water and the boiler metal inside the boiler to avoid or slow down the corrosion of the impurities in the water on the boiler metal and prevent boiler scaling.

[0004] Phosphonic acid derivatives have been widely used as scale inhibitors for circulating water. Adding corrosion inhibitors, polyphosphorus, organic phosphorus and nitrogen oxides can effectively prevent metal corrosion. However, discharging circulating cooling water containing nitrogen and phosphorus into natural water bodies is likely to cause the enrichment of nutrients. The large-scale use of such corrosion and scale inhibitors will still increase the phosphorus load in the water body. Summary of the invention

[0005] The purpose of the present invention is to provide an organic corrosion and scale inhibition water treatment agent.

[0006] An organic corrosion and scale inhibition water treatment agent comprises the following components in parts by weight: 20-60 parts of corrosion inhibitor, 10-30 parts of scale inhibitor, 2-8 parts of penetrant, 3-10 parts of acrylic acid-maleic acid copolymer, 1-3 parts of benzotriazole and 10-50 parts of water.

[0007] The scale inhibitor is a mixture of modified polyaspartic acid and acrylic acid-isoprene polyoxycarboxylate (AA-TPEL) in a mass ratio of 2:1.

[0008] The modified polyaspartic acid is prepared by the following method: 1-3 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 35-45°C for heating and stirring to obtain a suspension; 0.5-1.5 parts of L-isoleucine and 0.5-1.5 parts of aminosulfonic acid are weighed and dissolved in 20-60 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 0.5-1.5 hours; then the reaction is carried out under alkaline conditions for 1-3 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 1000-2500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 35-45°C to obtain a finished product.

[0009] The penetrant is fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether, penetrant T or penetrant JFC.

[0010] The scale inhibitor is a mixture of cornflower extract and bamboo leaf extract in a mass ratio of 1:1.

[0011] The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 40-60°C, crushed, passed through a 40-80 mesh sieve, 50g of cornflower powder is weighed, soaked in 300-600mL10% H2SO4 at room temperature for 3-8h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL with 10% sulfuric acid.

[0012] The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 40-60° C., crushed, passed through a 60-100 mesh sieve, 50 g of bamboo leaf powder is weighed, soaked in 500-800 mL of 10% H2SO4 at room temperature for 5-10 hours, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1 g / mL using 10% sulfuric acid.

[0013] The preparation method of the organic corrosion and scale inhibition water treatment agent is carried out according to the following steps: taking 10-30 parts of scale inhibitor by weight, adding 10-50 parts of water, and stirring evenly; heating to 40-70°C, adding 20-60 parts of scale inhibitor, 2-8 parts of penetrant, 3-10 parts of acrylic acid-maleic acid copolymer, and 1-3 parts of benzotriazole, stirring evenly, and cooling to room temperature to prepare.

[0014] The beneficial effects of the present invention are as follows: the organic corrosion and scale inhibition water treatment agent prepared by the present invention is suitable for the treatment of boiler water, has no corrosion to the inside of the boiler, increases the critical salt content of boiler water, and reduces the amount of sewage discharged; effectively inhibits the formation of scale and prevents the occurrence of scaling problems in furnace tubes; can effectively eliminate foam and reduce the phenomenon of boiler water vapor entrainment; improves heat exchange effect, saves energy, and reduces the generation of sediment and pickling; has good dispersibility for iron and silicon, and controls the generation of iron and silicon sediments; liquid products are safe to use and operate; do not contain phosphorus, sodium, calcium, magnesium, iron, copper, silicon dioxide, chloride, etc. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present invention, the present invention will be described more fully below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Example 1

[0016] An organic corrosion and scale inhibitor water treatment agent comprises the following components in parts by weight: 40 parts of corrosion inhibitor, 20 parts of scale inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, 2 parts of benzotriazole, and 30 parts of water; the corrosion inhibitor is a mixture of modified polyaspartic acid and acrylic acid-isopentenyl polyoxycarboxylate (AA-TPEL) in a mass ratio of 2:1; the scale inhibitor is a mixture of cornflower extract and bamboo leaf extract in a mass ratio of 1:1.

[0017] The modified polyaspartic acid is prepared by the following method: 2 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 40°C for heating and stirring to obtain a suspension; 1 part of L-isoleucine and 1 part of aminosulfonic acid are weighed and dissolved in 40 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 1 hour; then the reaction is carried out under alkaline conditions for 2 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 1500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 40°C to obtain a finished product.

[0018] The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through a 60-mesh sieve, 50g of cornflower powder is weighed, soaked in 500mL of 10% H2SO4 at room temperature for 6h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL using 10% sulfuric acid.

[0019] The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through an 80-mesh sieve, 50g of bamboo leaf powder is weighed, soaked in 600mL of 10% H2SO4 at room temperature for 8h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL with 10% sulfuric acid.

[0020] The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: according to the weight ratio, take 20 parts of scale inhibitor, add 30 parts of water, and stir evenly; heat up to 50°C, add 40 parts of corrosion inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, and 2 parts of benzotriazole, stir evenly, and cool to room temperature to prepare.

[0021] Example 2

[0022] An organic corrosion and scale inhibitor water treatment agent comprises the following components in parts by weight: 22 parts of corrosion inhibitor, 12 parts of scale inhibitor, 3 parts of isomeric tridecanol polyoxyethylene ether, 4 parts of acrylic acid-maleic acid copolymer, 1 part of benzotriazole, and 15 parts of water; the corrosion inhibitor is a mixture of modified polyaspartic acid and acrylic acid-isopentenyl polyoxycarboxylate (AA-TPEL) in a mass ratio of 2:1; the scale inhibitor is a mixture of cornflower extract and bamboo leaf extract in a mass ratio of 1:1.

[0023] The modified polyaspartic acid is prepared by the following method: according to the weight ratio, 1 part of polysuccinimide is dissolved in water, and the suspension is placed in a water bath at 35°C for heating and stirring to obtain a suspension; 0.5 parts of L-isoleucine and 0.5 parts of aminosulfonic acid are weighed and dissolved in 20 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 0.5 hours; then the reaction is carried out under alkaline conditions for 1 hour; after the reaction is completed, the pH of the solution is adjusted to 7, 1000 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 35°C to obtain a finished product.

[0024] The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 40°C, crushed, passed through a 40-mesh sieve, 50g of cornflower powder is weighed, soaked in 300mL of 10% H2SO4 at room temperature for 3h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL with 10% sulfuric acid.

[0025] The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 40° C., crushed, passed through a 60-mesh sieve, 50 g of bamboo leaf powder is weighed, soaked in 500 mL of 10% H2SO4 at room temperature for 5 hours, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1 g / mL using 10% sulfuric acid.

[0026] The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: according to the weight ratio, 12 parts of the scale inhibitor are taken, 15 parts of water are added, and the mixture is stirred evenly; the temperature is raised to 45° C., 22 parts of the corrosion inhibitor, 3 parts of isomeric tridecanol polyoxyethylene ether, 4 parts of acrylic acid-maleic acid copolymer, and 1 part of benzotriazole are added, the mixture is stirred evenly, and the mixture is cooled to room temperature to prepare the mixture. Example 3

[0027] An organic corrosion and scale inhibitor water treatment agent comprises the following components in parts by weight: 60 parts of corrosion inhibitor, 30 parts of scale inhibitor, 8 parts of penetrant JFC, 10 parts of acrylic acid-maleic acid copolymer, 3 parts of benzotriazole, and 50 parts of water; the corrosion inhibitor is a mixture of modified polyaspartic acid and acrylic acid-isopentenyl polyoxycarboxylate (AA-TPEL) in a mass ratio of 2:1; the scale inhibitor is a mixture of cornflower extract and bamboo leaf extract in a mass ratio of 1:1.

[0028] The modified polyaspartic acid is prepared by the following method: 3 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 45° C. and heated and stirred to obtain a suspension; 1.5 parts of L-isoleucine and 1.5 parts of aminosulfonic acid are weighed and dissolved in 60 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 1.5 hours; then the reaction is carried out under alkaline conditions for 3 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 2500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 45° C. to obtain a finished product.

[0029] The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 60°C, crushed, passed through an 80-mesh sieve, 50g of cornflower powder is weighed, soaked in 600mL of 10% H2SO4 at room temperature for 8h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL using 10% sulfuric acid.

[0030] The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 60° C., crushed, passed through a 100-mesh sieve, 50 g of bamboo leaf powder is weighed, soaked in 800 mL of 10% H2SO4 at room temperature for 10 hours, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1 g / mL using 10% sulfuric acid.

[0031] The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: according to the weight parts, 30 parts of the scale inhibitor are taken, 50 parts of water are added, and the mixture is stirred evenly; the temperature is raised to 70° C., 60 parts of the corrosion inhibitor, 8 parts of the penetrant JFC, 10 parts of the acrylic acid-maleic acid copolymer, and 3 parts of benzotriazole are added, the mixture is stirred evenly, and the mixture is cooled to room temperature to prepare the product.

[0032] Comparative Example 1

[0033] An organic corrosion and scale inhibitor water treatment agent comprises the following components in parts by weight: 40 parts of corrosion inhibitor, 20 parts of scale inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, 2 parts of benzotriazole, and 30 parts of water; the corrosion inhibitor is modified polyaspartic acid; the scale inhibitor is a mixture of cornflower extract and bamboo leaf extract in a mass ratio of 1:1.

[0034] The modified polyaspartic acid is prepared by the following method: 2 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 40°C for heating and stirring to obtain a suspension; 1 part of L-isoleucine and 1 part of aminosulfonic acid are weighed and dissolved in 40 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 1 hour; then the reaction is carried out under alkaline conditions for 2 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 1500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 40°C to obtain a finished product.

[0035] The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through a 60-mesh sieve, 50g of cornflower powder is weighed, soaked in 500mL of 10% H2SO4 at room temperature for 6h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL using 10% sulfuric acid.

[0036] The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through an 80-mesh sieve, 50g of bamboo leaf powder is weighed, soaked in 600mL of 10% H2SO4 at room temperature for 8h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL with 10% sulfuric acid.

[0037] The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: according to the weight ratio, take 20 parts of scale inhibitor, add 30 parts of water, and stir evenly; heat up to 50°C, add 40 parts of corrosion inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, and 2 parts of benzotriazole, stir evenly, and cool to room temperature to prepare.

[0038] Comparative Example 2

[0039] An organic corrosion and scale inhibitor water treatment agent comprises the following components in parts by weight: 40 parts of corrosion inhibitor, 20 parts of scale inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, 2 parts of benzotriazole, and 30 parts of water; the corrosion inhibitor is acrylic acid-isopentenyl polyoxycarboxylate (AA-TPEL); the scale inhibitor is a mixture of cornflower extract and bamboo leaf extract in a mass ratio of 1:1.

[0040] The modified polyaspartic acid is prepared by the following method: 2 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 40°C for heating and stirring to obtain a suspension; 1 part of L-isoleucine and 1 part of aminosulfonic acid are weighed and dissolved in 40 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 1 hour; then the reaction is carried out under alkaline conditions for 2 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 1500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 40°C to obtain a finished product.

[0041] The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through a 60-mesh sieve, 50g of cornflower powder is weighed, soaked in 500mL of 10% H2SO4 at room temperature for 6h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL using 10% sulfuric acid.

[0042] The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through an 80-mesh sieve, 50g of bamboo leaf powder is weighed, soaked in 600mL of 10% H2SO4 at room temperature for 8h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL with 10% sulfuric acid.

[0043] The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: according to the weight ratio, take 20 parts of scale inhibitor, add 30 parts of water, and stir evenly; heat up to 50°C, add 40 parts of corrosion inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, and 2 parts of benzotriazole, stir evenly, and cool to room temperature to prepare. Comparative Example 3

[0044] An organic corrosion and scale inhibitor water treatment agent comprises the following components in parts by weight: 40 parts of corrosion inhibitor, 20 parts of scale inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, 2 parts of benzotriazole, and 30 parts of water; the corrosion inhibitor is a mixture of modified polyaspartic acid and acrylic acid-isopentenyl polyoxycarboxylate (AA-TPEL) in a mass ratio of 2:1; the scale inhibitor is cornflower extract.

[0045] The modified polyaspartic acid is prepared by the following method: 2 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 40°C for heating and stirring to obtain a suspension; 1 part of L-isoleucine and 1 part of aminosulfonic acid are weighed and dissolved in 40 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 1 hour; then the reaction is carried out under alkaline conditions for 2 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 1500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 40°C to obtain a finished product.

[0046] The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through a 60-mesh sieve, 50g of cornflower powder is weighed, soaked in 500mL of 10% H2SO4 at room temperature for 6h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL using 10% sulfuric acid.

[0047] The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: according to the weight ratio, take 20 parts of scale inhibitor, add 30 parts of water, and stir evenly; heat up to 50°C, add 40 parts of corrosion inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, and 2 parts of benzotriazole, stir evenly, and cool to room temperature to prepare. Comparative Example 4

[0048] An organic corrosion and scale inhibitor water treatment agent comprises the following components in parts by weight: 40 parts of corrosion inhibitor, 20 parts of scale inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, 2 parts of benzotriazole, and 30 parts of water; the corrosion inhibitor is a mixture of modified polyaspartic acid and acrylic acid-isopentenyl polyoxycarboxylate (AA-TPEL) in a mass ratio of 2:1; the scale inhibitor is bamboo leaf extract.

[0049] The modified polyaspartic acid is prepared by the following method: 2 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 40°C for heating and stirring to obtain a suspension; 1 part of L-isoleucine and 1 part of aminosulfonic acid are weighed and dissolved in 40 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 1 hour; then the reaction is carried out under alkaline conditions for 2 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 1500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 40°C to obtain a finished product.

[0050] The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 50°C, crushed, passed through an 80-mesh sieve, 50g of bamboo leaf powder is weighed, soaked in 600mL of 10% H2SO4 at room temperature for 8h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL with 10% sulfuric acid.

[0051] The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: according to the weight ratio, take 20 parts of scale inhibitor, add 30 parts of water, and stir evenly; heat up to 50°C, add 40 parts of corrosion inhibitor, 6 parts of fatty alcohol polyoxyethylene ether, 5 parts of acrylic acid-maleic acid copolymer, and 2 parts of benzotriazole, stir evenly, and cool to room temperature to prepare.

[0052] Example:

[0053] Determination method of corrosion inhibition performance: RCC-Ⅲ rotary coupon tester is used for determination. The indicators of treated water samples are: pH7.2, conductivity928, total alkalinity58, total hardness368, , .

[0054] During the experiment, the experimental temperature was set at 45 ± 1 °C, the RCC-Ⅲ type rotating hanging plate used A3 carbon steel sheet, the rotation speed was set at 73r / min, and the experimental time was set at 72h. The calculation formulas for the annual corrosion rate and corrosion inhibition rate are:

[0055] ;

[0056] Where X is the annual corrosion rate, m0 is the mass of the carbon steel sheet before the experiment, and m is the mass of the carbon steel sheet after the experiment. S is the surface area of ​​the carbon steel sheet, is the density of carbon steel sheet.

[0057]

[0058] That is the corrosion inhibition rate, X0 is the corrosion rate of the carbon steel sheet before the experiment, and X1 is the corrosion rate after adding the water treatment agent.

[0059] SPSS 24.0 software was used for statistical analysis, and the quantitative data were analyzed by The data were expressed as mean ± standard deviation. The Kolmogorov-Smirnov test was used for normality test. For data that met the normal distribution, the t-test was used to compare the mean differences between the two groups. The difference was considered statistically significant when P < 0.05.

[0060] The measurement results are shown in Table 1: Note: * represents P < 0.05 compared with Example 1.

[0061] Determination method of scale inhibition performance: The static scale inhibition method is used for testing. During the test, the water to be tested is first heated. The purpose of heating is mainly to precipitate CaCO3 in the water. After heating, EDTA, sodium hydroxide and calcium indicator are used to determine the Ca in the water. 2+ , and finally the scale inhibition performance can be detected.

[0062] The calculation formula of scale inhibition rate is:

[0063] Among them, V E After adding water treatment agent Quality, V0 is after the experiment without adding water treatment agent The quality of V T is the water treatment agent before the experiment quality.

[0064] SPSS 24.0 software was used for statistical analysis, and the quantitative data were analyzed by The data were expressed as mean ± standard deviation. The Kolmogorov-Smirnov test was used for normality test. For data that met the normal distribution, the t-test was used to compare the mean differences between the two groups. The difference was considered statistically significant when P < 0.05.

[0065] The measurement results are shown in Table 2: Note: * represents P < 0.05 compared with Example 1.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An organic corrosion and scale inhibition water treatment agent, characterized in that: The invention comprises the following components in parts by weight: 20-60 parts of corrosion inhibitor, 10-30 parts of scale inhibitor, 2-8 parts of penetrant, 3-10 parts of acrylic acid-maleic acid copolymer, 1-3 parts of benzotriazole and 10-50 parts of water; The corrosion inhibitor is a mixture of modified polyaspartic acid and acrylic acid-isopentenyl polyoxycarboxylate in a mass ratio of 2:1; The modified polyaspartic acid is prepared by the following method: 1-3 parts of polysuccinimide are dissolved in water according to weight, and the suspension is placed in a water bath at 35-45° C. and heated and stirred to obtain a suspension; 0.5-1.5 parts of L-isoleucine and 0.5-1.5 parts of aminosulfonic acid are weighed and dissolved in 20-60 parts of NaOH solution to obtain a solution; the solution is slowly added to the suspension and the addition is completed within 0.5-1.5 hours; then the reaction is carried out under alkaline conditions for 1-3 hours; after the reaction is completed, the pH of the solution is adjusted to 7, 1000-2500 parts of anhydrous ethanol are added, and the mixture is fully stirred to obtain floccules, which are finally filtered with a suction filter, and the obtained solid is placed in an oven and dried to constant weight at 35-45° C. to obtain a finished product; The preparation method of the organic corrosion and scale inhibitor water treatment agent is carried out according to the following steps: taking 10-30 parts of scale inhibitor by weight, adding 10-50 parts of water, and stirring evenly; heating to 40-70°C, adding 20-60 parts of corrosion inhibitor, 2-8 parts of penetrant, 3-10 parts of acrylic acid-maleic acid copolymer and 1-3 parts of benzotriazole, stirring evenly, and cooling to room temperature to prepare.

2. The organic corrosion and scale inhibition water treatment agent according to claim 1, characterized in that: The penetrant is fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether or penetrant T.

3. The organic corrosion and scale inhibition water treatment agent according to claim 1, characterized in that: The scale inhibitor is a mixture of cornflower extract and bamboo leaf extract in a mass ratio of 1:

1.

4. The organic corrosion and scale inhibition water treatment agent according to claim 3, characterized in that: The extraction method of the cornflower extract is as follows: fresh cornflowers are picked, washed, dried in the shade, placed in a drying oven, dried at 40-60°C, crushed, passed through a 40-80 mesh sieve, 50g of cornflower powder is weighed, soaked in 300-600mL 10% H2SO4 at room temperature for 3-8h, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1g / mL with 10% sulfuric acid.

5. The organic corrosion and scale inhibition water treatment agent according to claim 3, characterized in that: The extraction method of the bamboo leaf extract is as follows: fresh bamboo leaves are picked, washed, dried in the shade, placed in a drying oven, dried at 40-60° C., crushed, passed through a 60-100 mesh sieve, 50 g of bamboo leaf powder is weighed, soaked in 500-800 mL of 10% H2SO4 at room temperature for 5-10 hours, filtered under reduced pressure, and prepared into a solution with a concentration of 0.1 g / mL using 10% sulfuric acid.

6. The method for preparing the organic corrosion and scale inhibition water treatment agent according to claim 1, characterized in that: The process is as follows: according to weight proportions, take 10-30 parts of scale inhibitor, add 10-50 parts of water, and stir evenly; raise the temperature to 40-70°C, add 20-60 parts of corrosion inhibitor, 2-8 parts of penetrant, 3-10 parts of acrylic acid-maleic acid copolymer and 1-3 parts of benzotriazole, stir evenly, and cool to room temperature to prepare the product.

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