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Low-phosphorus water treatment composition

A composition and water treatment technology, applied in the fields of low-phosphorus water treatment compositions and composite corrosion and scale inhibitors, can solve problems such as application limitations, and achieve the effects of saving equipment investment, promoting environmental protection, and simple preparation

Inactive Publication Date: 2010-06-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environmental protection departments of many countries have issued corresponding laws and regulations to limit the discharge of phosphorus-containing compounds. my country has required that the discharge of phosphorus is ≤0.5mg / L (DB12 / 356-2008), and the commonly used organic phosphine formula has a phosphorus content in circulating water Generally 4-10mg / L, so the application of commonly used organic phosphine will be limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 13.33% by weight of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, 20% polyaspartic acid (molecular weight: 2000-5000), 20% polyacrylic acid, 20% acrylic acid-acrylic acid Ester-sulfonate, 9.93% zinc sulfate, 2% bactericidal algicide chlorine dioxide and 14.74% deionized water are placed in a container and stirred evenly at room temperature to obtain the low phosphorus water treatment combination of the present invention things.

[0026] Experiments were carried out under the following water quality conditions: Ca 2+ 90.17mg / L, Cl - 9.54mg / L, SO4 2- 41.62mg / L, total alkalinity 143.745mg / L, conductivity 290μs / cm, PH 7.75.

[0027] Add 10 mg / L of the above-mentioned low-phosphorus water treatment composition into the above-mentioned water quality, when the concentration ratio reaches 5, the static scale inhibition rate reaches 93.24%; the corrosion rate of 20# carbon steel in the rotating coupon test is 0.0139mm / a.

Embodiment 2

[0029] 13.33% by weight of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, 16.67% polyacrylic acid, 16.67% acrylic acid-acrylate-sulfonate, 9.93% zinc sulfate, 2% bactericidal The algicide dichloroisocyanuric acid and 41.40% deionized water are placed in a container at room temperature and stirred evenly to obtain the low phosphorus water treatment composition of the present invention.

[0030] Experiments were carried out under the following water quality conditions: Ca 2+ 90.17mg / L, Cl - 9.54mg / L, SO4 2- 41.62mg / L, total alkalinity 143.745mg / L, conductivity 290μs / cm, PH 7.75.

[0031] Add 10mg / L of the above-mentioned low-phosphorus water treatment composition into the above-mentioned water quality, when the concentration ratio reaches 5, the static scale inhibition rate reaches 92.67%; the corrosion rate of 20# carbon steel in the rotating coupon test is 0.0286mm / a.

Embodiment 3

[0033] 13.33% by weight of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, 20% polymaleic anhydride, 18% polyacrylic acid, 20% acrylic acid-acrylate-sulfonate, 9.93% Zinc chloride, 2% bactericidal algicide isothiazolinone and 16.74% deionized water are placed in a container at room temperature and stirred evenly to obtain the low phosphorus water treatment composition of the present invention.

[0034] Experiments were carried out under the following water quality conditions: Ca 2+ 90.17mg / L, Cl - 9.54mg / L, SO4 2- 41.62mg / L, total alkalinity 143.745mg / L, conductivity 290μs / cm, PH 7.75.

[0035] Add 50mg / L of the above-mentioned low-phosphorus water treatment composition into the above-mentioned water quality, when the concentration ratio reaches 5, the static scale inhibition rate reaches 92.32%; the corrosion rate of 20# carbon steel in the rotating coupon test is 0.0628mm / a.

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PUM

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Abstract

The invention relates to a low-phosphorus water treatment composition, which comprises the following compositions in part by weight: 1 to 3 parts of phosphorus carboxylate, 1 to 30 parts of dirt dispersion agent and 1 to 5 parts of bactericide and algicide. When the concentration multiple is 2 to 6, the corrosion rate and the scale deposition rate of a circulating cooling water system of carbon steel and copper pipelines are all smaller than circulating water quality monitoring and controlling indexes, the industrial water is saved, the environmental pollution is reduced, and the low-phosphorus water treatment composition is widely applied to similar circulating cooling water systems in chemical engineering, petrifaction, steel, electric power and the like, and has great social and economic benefits and promotion value.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a low-phosphorus water treatment composition, which is a compound corrosion and scale inhibitor widely applicable to similar circulating cooling water systems in chemical industry, petrochemical industry, steel industry and electric power industry. Background technique [0002] In the circulating cooling water system, there are mainly three problems of scaling, corrosion and microbial hazards. The most convenient and effective way to prevent system scaling and corrosion is to add corrosion and scale inhibitors to the circulating cooling water. At present, the formulas commonly used in the treatment of circulating cooling water in China are mostly phosphine-based formulas, and the main agent is phosphonic acid group (-PO 3 h 2 ) Corrosion and scale inhibitors directly connected to carbon atoms, often called organic phosphonic acids. They mainly include: hydroxyethyl...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F1/50C02F103/02
CPCC23F11/08C23F14/02
Inventor 陈国松王玲唐美华张之翼丁爱红耿燕封志杰吴丽娟
Owner NANJING UNIV OF TECH
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