Phosphorus-free composite scale and corrosion inhibitor, applications thereof, and processing method for circulating water

A scale and corrosion inhibitor, phosphorus-free corrosion inhibition technology, applied in water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, descaling and water softening, etc., can solve the problem of short drug effect time, Fungicides are slow to take effect and other problems, to achieve the effects of long drug effect time, improved bactericidal effect, and high tolerance

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the treatment process of circulating water, it is necessary to add a bactericide while adding a scale and corrosion inhibitor to inhibit the growth of microorganisms in the circulating water, but when using the above-mentioned scal

Method used

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  • Phosphorus-free composite scale and corrosion inhibitor, applications thereof, and processing method for circulating water
  • Phosphorus-free composite scale and corrosion inhibitor, applications thereof, and processing method for circulating water
  • Phosphorus-free composite scale and corrosion inhibitor, applications thereof, and processing method for circulating water

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Add sodium molybdate, thiourea, T225, manganese sulfate monohydrate and isothiazolinone to test water 1, 2 and 3 respectively (use sulfuric acid to adjust the pH value of the test water in the range of 7.8-8.3) to make molybdenum in the water Sodium acid, thiourea, T225, Mn 2+ and isothiazolinone concentrations were 12mg / L, 100mg / L, 8mg / L, 1mg / L and 50mg / L.

Embodiment 2

[0065] Add sodium tungstate, urotropine, AA / AMPS / HPA, manganese chloride and isothiazoline to test water 1, 2 and 3 respectively (use sulfuric acid to adjust the pH value of the test water in the range of 7.8-8.3) Ketones, sodium tungstate, urotropine, AA / AMPS / HPA, Mn 2+ and isothiazolinone concentrations were 18mg / L, 120mg / L, 9mg / L, 1.5mg / L and 80mg / L.

Embodiment 3

[0067] Add sodium silicate, methylthiourea, AA / HPA / MA, manganese sulfate monohydrate and isothiazole to test water 1, 2 and 3 respectively (use sulfuric acid to adjust the pH value of the test water in the range of 7.8-8.3) Linone, sodium silicate, methylthiourea, AA / HPA / MA, Mn in water 2+ and isothiazolinone concentrations were 20mg / L, 110mg / L, 10mg / L, 2mg / L and 100mg / L.

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Abstract

The invention discloses a phosphorus-free composite scale and corrosion inhibitor, applications thereof, and a processing method for circulating water. The phosphorus-free composite scale and corrosion inhibitor comprises dispersants, phosphorus-free corrosion inhibitors and manganese salts. The weight ratio of the dispersants, the phosphorus-free corrosion inhibitors and the manganese salts is 1:0.5-50:0.025-0.5, wherein the weight of the manganese salts is in terms of manganese ions. The phosphorus-free composite scale and corrosion inhibitor has good synergistic effects with non-oxidation-type bactericides, especially isothiazolinone, and can raise the bactericidal effects of the non-oxidation-type bactericides obviously, the bactericidal speed is rapid and the drug effect time is long. The phosphorus-free composite scale and corrosion inhibitor is environmentally friendly, has phosphorus-free and nitrogen-free characteristics, meets green environmental protection requirements, and reduces environmental burden. The phosphorus-free composite scale and corrosion inhibitor has a wide water quality adaptation range, and is easy to be popularized and applied.

Description

technical field [0001] The invention relates to a phosphorus-free composite scale and corrosion inhibitor and its application and a treatment method for circulating water, in particular, to a phosphorus-free composite scale and corrosion inhibitor and its application in circulating water treatment and the use of the non-phosphorus A circulating water treatment method for a phosphorus composite scale and corrosion inhibitor. Background technique [0002] Water is the basic condition for human survival, but water resources in the world are limited. my country's per capita water volume is only a quarter of the world's per capita water volume, and water resources are even poorer. With the rapid development of industry, the ecological balance of water has been seriously damaged. In order to solve the water resource crisis and adapt to sustainable development, it is necessary to save water reasonably. The amount of cooling water in industrial water accounts for 60-80% by weight...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F1/50
Inventor 冯婕郦和生胡艳华王岽
Owner CHINA PETROLEUM & CHEM CORP
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