Phosphorus-free water treatment agent for high-concentration iron ion circulating water

Abstract

The invention discloses a phosphorus-free water treatment agent for high-concentration iron ion circulating water. The phosphorus-free water treatment agent comprises a scale and corrosion inhibitor and a high-efficiency dispersing agent, and the adding concentration of the phosphorus-free water treatment agent is 5-20mg / L in terms of supplemented water. The scale and corrosion inhibitor comprises10%-20% of a non-phosphorus scale inhibitor, 30%-40% of an organic corrosion inhibitor, 1%-5% of a copper corrosion inhibitor, 1%-5% of an inorganic corrosion inhibitor and 30%-58% of deionized water. The efficient dispersing agent is prepared from 20%-30% of an organic polymer, 10%-20% of iron ion organic complexing agent and 50%-70% of deionized water. The organic polymer in the phosphorus-freeagent is capable of stabilizing iron ions in circulating water, so that under-scale corrosion caused by forming of stains on equipment surfaces by iron ions is prevented; the iron ion complexing agent is capable of complexing free iron ions in circulating water, disturbing the reaction of Fe<3+> and Fe, and relieving corrosion and the like problems caused by the iron ions in the circulating water.

Description

technical field

[0001] The invention belongs to the field of circulating cooling water, and in particular relates to a phosphorus-free water treatment agent for circulating water with high concentration of iron ions. Background technique

[0002] Circulating cooling water accounts for more than 80% of industrial water. The recycling of circulating water has significant environmental benefits, economic benefits and social benefits. At present, the purpose of saving water is achieved by increasing the concentration multiple. However, if the concentration of iron ions in the raw water is high Then restrict the improvement of the concentration factor. Part of the water quality in the Songhua River Basin and the Heilongjiang River Basin contains a large amount of iron ions, and the flocculation effect is very poor. The pretreated water still has a high concentration of iron ions. 3+ It can also promote the dissolution of metallic iron into divalent iron and accelerate the corros...

Examples

Embodiment 1

[0018] Preparation of corrosion and scale inhibitors: Add 530kg of deionized water to the reactor, start stirring, then add 100kg of deacetylated chitin, 150kg of polyepoxysuccinic acid, 150kg of polyaspartic acid, 50kg of zinc sulfate heptahydrate, methyl 20kg of benzotriazole, fully stirred until uniform, then cooled to room temperature, the liquid obtained is the corrosion and scale inhibitor.

[0019] Prepare a high-efficiency dispersant: add 600kg of deionized water to the reactor, start stirring, then add 300kg of terpolymer based on maleic anhydride, acrylic acid, and acrylamide group, and 100kg of lauroyl diethanolamine, stir well, and cool to room temperature The resulting liquid is a high-efficiency dispersant.

Embodiment 2

[0021] Preparation of corrosion and scale inhibitors: Add 530kg of deionized water to the reactor, start stirring, then add 100kg of deacetylated chitin, 150kg of polyepoxysuccinic acid, 150kg of polyaspartic acid, 50kg of zinc sulfate heptahydrate, methyl 20kg of benzotriazole, fully stirred until uniform, then cooled to room temperature, the liquid obtained is the corrosion and scale inhibitor.

[0022] Prepare a high-efficiency dispersant: add 580kg of deionized water to the reactor, start stirring, then add 300kg of terpolymer based on maleic anhydride, acrylic acid, and acrylamide group, and 120kg of lauroyl diethanolamine, stir well, and cool to room temperature The resulting liquid is a high-efficiency dispersant.

Embodiment 3

[0024] Preparation of corrosion and scale inhibitors: Add 530kg of deionized water to the reactor, start stirring, then add 100kg of deacetylated chitin, 150kg of polyepoxysuccinic acid, 150kg of polyaspartic acid, 50kg of zinc sulfate heptahydrate, methyl 20kg of benzotriazole, fully stirred until uniform, then cooled to room temperature, the liquid obtained is the corrosion and scale inhibitor.

[0025] Prepare a high-efficiency dispersant: add 550kg of deionized water to the reactor, start stirring, then add 300kg of terpolymer based on maleic anhydride, acrylic acid, and acrylamide group, and 150kg of lauroyl diethanolamine, stir well, and cool to room temperature The resulting liquid is a high-efficiency dispersant.

[0026] Performance Testing

[0027] The performance evaluation of this product is carried out in the dynamic furnace simulation device of circulating water, the conductivity of supplemented water is 90μS / cm, the hardness is 0.5mmol / L, the turbidity is 1.2NT...

technical field

[0001] The invention belongs to the field of circulating cooling water, and in particular relates to a phosphorus-free water treatment agent for circulating water with high concentration of iron ions. Background technique

[0002] Circulating cooling water accounts for more than 80% of industrial water. The recycling of circulating water has significant environmental benefits, economic benefits and social benefits. At present, the purpose of saving water is achieved by increasing the concentration multiple. However, if the concentration of iron ions in the raw water is high Then restrict the improvement of the concentration factor. Part of the water quality in the Songhua River Basin and the Heilongjiang River Basin contains a large amount of iron ions, and the flocculation effect is very poor. The pretreated water still has a high concentration of iron ions. 3+ It can also promote the dissolution of metallic iron into divalent iron and accelerate the corros...

Examples

Embodiment 1

[0018] Preparation of corrosion and scale inhibitors: Add 530kg of deionized water to the reactor, start stirring, then add 100kg of deacetylated chitin, 150kg of polyepoxysuccinic acid, 150kg of polyaspartic acid, 50kg of zinc sulfate heptahydrate, methyl 20kg of benzotriazole, fully stirred until uniform, then cooled to room temperature, the liquid obtained is the corrosion and scale inhibitor.

[0019] Prepare a high-efficiency dispersant: add 600kg of deionized water to the reactor, start stirring, then add 300kg of terpolymer based on maleic anhydride, acrylic acid, and acrylamide group, and 100kg of lauroyl diethanolamine, stir well, and cool to room temperature The resulting liquid is a high-efficiency dispersant.

Embodiment 2

[0021] Preparation of corrosion and scale inhibitors: Add 530kg of deionized water to the reactor, start stirring, then add 100kg of deacetylated chitin, 150kg of polyepoxysuccinic acid, 150kg of polyaspartic acid, 50kg of zinc sulfate heptahydrate, methyl 20kg of benzotriazole, fully stirred until uniform, then cooled to room temperature, the liquid obtained is the corrosion and scale inhibitor.

[0022] Prepare a high-efficiency dispersant: add 580kg of deionized water to the reactor, start stirring, then add 300kg of terpolymer based on maleic anhydride, acrylic acid, and acrylamide group, and 120kg of lauroyl diethanolamine, stir well, and cool to room temperature The resulting liquid is a high-efficiency dispersant.

Embodiment 3

[0024] Preparation of corrosion and scale inhibitors: Add 530kg of deionized water to the reactor, start stirring, then add 100kg of deacetylated chitin, 150kg of polyepoxysuccinic acid, 150kg of polyaspartic acid, 50kg of zinc sulfate heptahydrate, methyl 20kg of benzotriazole, fully stirred until uniform, then cooled to room temperature, the liquid obtained is the corrosion and scale inhibitor.

[0025] Prepare a high-efficiency dispersant: add 550kg of deionized water to the reactor, start stirring, then add 300kg of terpolymer based on maleic anhydride, acrylic acid, and acrylamide group, and 150kg of lauroyl diethanolamine, stir well, and cool to room temperature The resulting liquid is a high-efficiency dispersant.

[0026] Performance Testing

[0027] The performance evaluation of this product is carried out in the dynamic furnace simulation device of circulating water, the conductivity of supplemented water is 90μS / cm, the hardness is 0.5mmol / L, the turbidity is 1.2NT...