Environment-friendly corrosion and scale inhibitor for boiler and preparation method of environment-friendly corrosion and scale inhibitor

A corrosion and scale inhibitor, an environment-friendly technology, applied in the field of environment-friendly corrosion and scale inhibitor for boilers and its preparation field, can solve the problems of low scale inhibition rate, high phosphorus content rate and high corrosion rate of the scale inhibitor, and achieves the High scale inhibition rate, low corrosion rate and good water solubility

Inactive Publication Date: 2017-04-05
WUXI LONGYING ENVIRONMENTAL PROTECTION TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides an environment-friendly corrosion and scale inhibitor for boilers and a preparation method thereof, which solves the technical problems of low scale inhibition rate, high corrosion rate, low tolerance and high phosphorus content of existing scale inhibitors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first step: weigh according to the ratio of parts by mass: 100 parts of deionized water; 50 parts of sodium sulfonate; 40 parts of potassium sulfonate; 2 parts of benzotriazole; 2-acrylamide-2-methylpropanesulfonate 30 parts of acid; 12 parts of dodecyl dimethyl benzyl ammonium chloride; 4 parts of methanol; 3 parts of alkylphenol polyoxyethylene ether; 10 parts of hexamethylenetetramine; 5 parts of sodium tungstate; 5 parts of lignin.

[0023] Step 2: Put methanol and sulfonated lignin into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 50°C, and stir for 40 minutes at a stirring speed of 90 rpm.

[0024] Step 3: Heat up to 100°C, add dodecyldimethylbenzyl ammonium chloride and remaining raw materials, and stir for 3 hours.

[0025] Wide range of sources of raw materials, good water solubility, suitable for thermal equipment such as boiler scaling and corrosion problems; the phosphorus value in the e...

Embodiment 2

[0027] The first step: weigh according to the ratio of parts by mass: 100 parts of deionized water; 70 parts of sodium sulfonate; 60 parts of potassium sulfonate; 6 parts of benzotriazole; 2-acrylamide-2-methylpropanesulfonate 50 parts of acid; 16 parts of dodecyl dimethyl benzyl ammonium chloride; 8 parts of methanol; 7 parts of alkylphenol polyoxyethylene ether; 30 parts of hexamethylenetetramine; 9 parts of sodium tungstate; 25 parts of lignin.

[0028] Step 2: Put methanol and sulfonated lignin into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 70°C, and stir for 60 minutes at a stirring speed of 110 rpm.

[0029] The third step: raise the temperature to 120°C, add dodecyldimethylbenzyl ammonium chloride and the remaining raw materials, and stir for 3-7 hours.

[0030] Wide range of sources of raw materials, good water solubility, suitable for scaling and corrosion of thermal equipment such as boilers; the ...

Embodiment 3

[0032] The first step: weigh according to the ratio of parts by mass: 100 parts of deionized water; 60 parts of sodium sulfonate; 50 parts of potassium sulfonate; 4 parts of benzotriazole; 2-acrylamide-2-methylpropanesulfonate 40 parts of acid; 14 parts of dodecyl dimethyl benzyl ammonium chloride; 6 parts of methanol; 5 parts of alkylphenol polyoxyethylene ether; 20 parts of hexamethylenetetramine; 7 parts of sodium tungstate; 15 parts of lignin.

[0033] Step 2: Put methanol and sulfonated lignin into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 60°C, and stir for 50 minutes at a stirring speed of 100 rpm.

[0034] The third step: raise the temperature to 110°C, add dodecyldimethylbenzyl ammonium chloride and the remaining raw materials, and stir for 3-7 hours.

[0035] Wide range of sources of raw materials, good water solubility, suitable for thermal equipment such as scaling and corrosion of boilers; the ...

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Abstract

The invention discloses an environment-friendly corrosion and scale inhibitor for a boiler. The environment-friendly corrosion and scale inhibitor is prepared from deionized water, sodium sulfonate, potassium sulfonate, benzotriazole, 2-acrylamide-2-methyl propane sulfonic acid, dodecyl dimethyl benzyl ammonium chloride, methyl alcohol, alkylphenol polyoxyethylene, hexamine, sodium tungstate and lignin sulfonate. The environment-friendly corrosion and scale inhibitor is applicable to dealing with scaling and corrosion problems of heat equipment such as the boiler; the phosphorus value in discharged water is 0.1 to 0.3 mg/L, appear of calcium phosphate scale precipitates can be prevented, the risk of eutrophication of water is reduced, the quality is reliable, and the tolerance is high; the inhibitor is high in applicability and can be prevented from being deposited on a high-temperature heat exchanger, and the service life of the boiler can be greatly prolonged; with the advantages of low dosage, efficiency and energy conservation, the inhibitor can be used in water with high alkalinity, high hardness, high pH value and high concentration multiple; all the components generate the synergistic effect; and the corrosion rate to carbon steel is 0.001 to 0.003 mm a<-1>, and the scale inhibition rate is 98.5 percent to 99.5 percent.

Description

technical field [0001] The invention relates to an environment-friendly material, in particular to an environment-friendly corrosion and scale inhibitor for boilers and a preparation method thereof. Background technique [0002] Anti-corrosion and anti-scaling agent Large, medium and small boilers prevent scaling and corrosion. The chemical treatment method in the furnace is commonly used. Anti-corrosion and anti-scaling agents are added to the boiler water to reduce the hardness of the boiler water, soften the water quality, and reduce scaling and corrosion. This method is simple and practical , which is very popular among users. [0003] Scale inhibitor: It is a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment . [0004] From the perspective of the mechanism of action, the role of scale inh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12
CPCC02F5/105C02F5/125C02F2303/08
Inventor 尤为杨燕宗
Owner WUXI LONGYING ENVIRONMENTAL PROTECTION TECHCO
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