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Composite corrosion and scale inhibitor and application thereof

A scale and corrosion inhibitor, soft water technology, applied in the direction of scale removal and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as hidden dangers in production safety, affecting the heat transfer effect of water coolers, etc. To achieve the effect of ensuring heat exchange effect, excellent scale inhibition and dispersion ability, and avoiding deposition

Inactive Publication Date: 2013-12-18
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the open circulating cooling water system, when the circulating water exchanges heat with the air in the cooling tower, the dust and sand in the air, especially some silicate and carbonate particles, are continuously washed into the circulating water. The silicate and carbonate in the water will be scaled and precipitated in the water cooler, which will affect the heat exchange effect of the water cooler and bring hidden dangers to safe production. Therefore, it is necessary to stabilize the water quality of soft water

Method used

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  • Composite corrosion and scale inhibitor and application thereof
  • Composite corrosion and scale inhibitor and application thereof
  • Composite corrosion and scale inhibitor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: A kind of composite antiscaling and corrosion inhibitor, by 2-phosphonic acid group-1,2,4-tricarboxybutane (PBTC), acrylic acid / 2-acrylamide-2-methylpropene sulfonic acid copolymer (AA / AMPS), hydrolyzed polymaleic anhydride (HPMA), polyamine polyether methylene phosphonic acid (PAPEMP) mixed. Wherein each component weight percent content is:

[0045]

[0046] The above composite scale and corrosion inhibitors are applied to deionized water, and 40 mg of composite scale and corrosion inhibitors are added to every 1 liter of deionized water. The static scale inhibition test shows that the scale inhibition rate of calcium carbonate is 82.5%, and the scale inhibition rate of silicate It is 80.2%; the rotating coupon test shows that the corrosion rate of the stainless steel test piece is 0.0008mm / a.

Embodiment 2

[0047] Embodiment 2: A kind of composite antiscaling and corrosion inhibitor, by 2-phosphonic acid group-1,2,4-tricarboxybutane (PBTC), acrylic acid / 2-acrylamide-2-methylpropene sulfonic acid copolymer (AA / AMPS), hydrolyzed polymaleic anhydride (HPMA), polyamine polyether methylene phosphonic acid (PAPEMP) mixed. Wherein each component weight percent content is:

[0048]

[0049] The above composite scale and corrosion inhibitors are applied to pure water, and 60 mg of composite scale and corrosion inhibitors are added to every 1 liter of pure water. The static scale inhibition test shows that the scale inhibition rate of calcium carbonate is 86.9%, and the scale inhibition rate of silicate is 83.1% %; rotating coupon test shows that: the corrosion rate of the stainless steel test piece is 0.0006mm / a.

Embodiment 3

[0050] Embodiment 3: A kind of composite antiscaling and corrosion inhibitor, by 2-phosphonic acid group-1,2,4-tricarboxybutane (PBTC), acrylic acid / 2-acrylamide-2-methylpropene sulfonic acid copolymer (AA / AMPS), hydrolyzed polymaleic anhydride (HPMA), polyamine polyether methylene phosphonic acid (PAPEMP) mixed. Wherein each component weight percent content is:

[0051]

[0052] The above composite scale and corrosion inhibitors are applied to steam condensed water, and 80 mg of composite scale and corrosion inhibitors are added to every 1 liter of steam condensed water. The static scale inhibition test shows that the scale inhibition rate of calcium carbonate is 90.4%, and the scale inhibition rate of silicate is 90.4%. It is 88.5%; the rotating coupon test shows that the corrosion rate of the stainless steel test piece is 0.0005mm / a.

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Abstract

The invention relates to an application of a composite corrosion and scale inhibitor. The composite corrosion and scale inhibitor is characterized by being formed by mixing 2-phosphono-1, 2, 4-trihydrolxy butane (PBTC), acrylic acid / 2-acrylamine-2-methyl propene sulfonic acid copolymer (AA / AMPS), hydrolytic polymaleic anhydride (HPMA) and ployamino polyether methylene phosphonate (PAPEMP). The composite corrosion and scale inhibitor has very good dispersion and scale inhibition effects on carbonates and silicates.

Description

technical field [0001] The invention relates to a composite scale and corrosion inhibitor for industrial circulating cooling water and its application, and is especially suitable for soft water circulating systems. Background technique [0002] In the industrial circulating cooling water system, although the circulating water volume of some circulating water systems is small, they are responsible for cooling some important equipment and precision instruments. Especially in the field of power generation and transformation, scaling and corrosion of water coolers will directly affect the safe operation of power generation and power supply devices. [0003] In order to ensure the safe, long, full and optimal operation of production equipment, water coolers in general power plants and substations are made of brass or stainless steel with good corrosion resistance, so the focus is on how to control and avoid scaling of circulating cooling water aspect. In order to fundamentally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/14
Inventor 胡迳嵩何思列
Owner CHINA PETROLEUM & CHEM CORP