Dirty blocking inhibitor and application in water treatment thereof

A technology of scale and corrosion inhibitors and copper corrosion inhibitors, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc., to achieve excellent scale inhibition performance, inhibit silicon scale and magnesium scale Formation, excellent anti-scaling effect

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Existing water treatment chemicals have achieved certain scale and corrosion inhibition effects in their respective applications, but for high-concentration water quality, especially high...

Method used

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  • Dirty blocking inhibitor and application in water treatment thereof
  • Dirty blocking inhibitor and application in water treatment thereof
  • Dirty blocking inhibitor and application in water treatment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of scale and corrosion inhibitors

[0040] Add 280Kg polyamino polyether base methylene phosphonic acid, 150Kg polyaspartic acid, 150Kg acrylic acid 2-acryloyl-2-methylpropanesulfonic acid / hydroxypropyl acrylate terpolymer, 140Kg di Ethylenetriaminepentamethylenephosphonic acid, 7Kg manganese acetate, stir well, then add 110Kg zinc sulfate and 150Kg concentrated sulfuric acid, stir well, then add 13Kg benzotriazole, stir at a certain temperature for a certain period of time, to obtain 1000Kg medicament.

[0041] The product is a yellow to reddish-brown transparent liquid, specific gravity > 1.20, pH 35%, total phosphorus content 6-10%, orthophosphorus and phosphorous content 1.0%.

[0042] Determination of scale inhibition performance (static test)

[0043]Under the water quality conditions of calcium hardness 1200mg / L (calculated as calcium carbonate) and total alkalinity of 1200mg / L (calculated as calcium carbonate), scale and corrosion inhibitors we...

Embodiment 2

[0061] Preparation of scale and corrosion inhibitors

[0062] In the reaction flask, add 40g polyamino polyether methylene phosphonic acid, 8g polyaspartic acid, 20g acrylic acid / 2-acryloyl-2-methylpropanesulfonic acid / hydroxypropyl acrylate terpolymer, 10g Diethylenetriaminepentamethylenephosphonic acid, 1g of manganese acetate, 1g of benzotriazole, 10g of zinc sulfate and 10g of concentrated sulfuric acid were stirred evenly at a certain temperature to obtain 100g of the medicament.

[0063] Measurement method of scale inhibition performance (static test), measurement method of corrosion inhibition performance (static test) / water quality conditions / test conditions, measurement method of scale and corrosion inhibition performance (dynamic simulation test) / replenishing water quality of circulating cooling water and examples 1, the other measurement conditions and results are shown in Table 5.

Embodiment 3

[0065] Preparation of scale and corrosion inhibitors

[0066] In the reaction flask, add 30g polyaminopolyether-based methylene phosphonic acid, 20g polyaspartic acid, 10g acrylic acid / 2-acryloyl-2-methylpropanesulfonic acid / hydroxypropyl acrylate terpolymer, 20g Diethylenetriaminepentamethylenephosphonic acid was stirred evenly at a certain temperature, and then 1g of benzotriazole, 1g of manganese acetate, 8g of zinc sulfate and 10g of concentrated sulfuric acid were added in sequence, and stirred evenly to obtain 100g of the medicament.

[0067] Measurement method of scale inhibition performance (static test), measurement method of corrosion inhibition performance (static test) / water quality conditions / test conditions, measurement method of scale and corrosion inhibition performance (dynamic simulation test) / replenishing water quality of circulating cooling water and examples 1, the other measurement conditions and results are shown in Table 5.

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Abstract

The invention provides anti-sludge inhibiter and the application method thereof. The inhibiter comprises multi-amino multi-ether methene phosphonic acid, poly-aspartic acid and acrylic polymer which comprises sulfonic groups, and at least one of other organic phosphonic acid, as well as zinc salt, inorganic acid, manganese salt and copper inhibiter. The inhibiter is applicable to the water quality with high rigidity, high alkaline and high salt. The sum of the rigidity the calcium and total alkalinity in water reaches 1500mg per liter, wherein, the inhibiter has excellent anti-sludge and corrosion inhibition effect when the rigidity of the calcium (counting in accordance with calcium carbonate ) is 1000mg per liter. The invention can be used in the circulated cooling water system of the industries such as petroleum chemical, as well as power and paper making plant. The invention can also be used in the water treatment process of poor water quality conditions such as seawater desalination and reverse osmosis.

Description

technical field [0001] The invention relates to a water treatment agent, in particular to a scale and corrosion inhibitor for high hardness and high alkali water quality and a water treatment method using the scale and corrosion inhibitor. Background technique [0002] In industrial production, the amount of cooling water accounts for about 60-80% of the total water consumption. Reducing the amount of fresh water replenishment in the circulating water system can effectively reduce water consumption and save water resources. [0003] The circulating cooling water generally contains some scale-forming substances, which will affect the normal operation of the circulating water system, especially in water with high calcium hardness and alkalinity. [0004] In order to reduce the consumption of fresh water in the circulating cooling water system, the method of increasing the concentration ratio is mainly used at present. For the water quality with high calcium hardness and alkali...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12C02F5/14
Inventor 周霖聂晋峰王峰邢琳平春霞曹栩然
Owner CHINA PETROLEUM & CHEM CORP
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