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Environment-friendly type composite pre-film reagent used for recirculated cooling water system pre-film processing and method of use thereof

A technology of circulating cooling water and pre-filming agent, applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc. The effect of good corrosion resistance, saving replacement water and fast film formation

Inactive Publication Date: 2008-05-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the objectives of the present invention is to provide a low-phosphorus environmental-friendly composite pre-film agent for pre-film treatment of circulating cooling water, so as to overcome the high phosphorus content of the existing pre-film agent formula and easily cause eutrophication of water bodies The problem

Method used

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  • Environment-friendly type composite pre-film reagent used for recirculated cooling water system pre-film processing and method of use thereof
  • Environment-friendly type composite pre-film reagent used for recirculated cooling water system pre-film processing and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation process: prepare 100.00g each of environment-friendly composite pre-film agent A and B

[0039] Preparation of agent A: 65.00g of 2-phosphonic acid group-1,2,4-tricarboxylic acid butane (PBTCA) with a solid content of 50% and 4.80g of acrylic acid / 2-methyl-butane with a solid content of 30% Mix and stir 2'-acrylamidopropanesulfonic acid binary copolymer (AA / AMPS) and 19.20 g of water evenly, then add 11.00 g of zinc sulfate heptahydrate and stir to dissolve, and obtain 100.00 g of the required A agent.

[0040] The preparation of agent B: be that 31.2g solid content is 40% sodium polyepoxysuccinate and 63.3g water mix and stir evenly, add the benzotriazole of 2.5g and 3.0g sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) Stir and dissolve to obtain the 100g B agent that needs to be prepared.

[0041] Add agent A and agent B of the above prepared agent solution directly to the experimental water in the ratio of weight ratio A:B=1:1 to carry out the rotary ha...

Embodiment 2

[0051] Preparation process: prepare 100.00g each of environment-friendly composite pre-film agent A and B

[0052] Preparation of Agent A: 66.60g solid content of 2-phosphonic acid group-1,2,4-tricarboxylic acid butane (PBTCA), 2.70g solid content of 30% acrylic acid / 2-methyl- Mix and stir 2'-acrylamidopropanesulfonic acid binary copolymer (AA / AMPS) and 18.70 g of water evenly, then add 12.00 g of zinc sulfate heptahydrate and stir to dissolve, and obtain 100.00 g of the required A agent.

[0053] Preparation of agent B: 50.00g solid content is 40% sodium polyepoxysuccinate mixed with 16.0g water and stirred evenly, then add 2.00g of benzotriazole and 4.00g of sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) Stir and dissolve to obtain the 100g B agent that needs to be prepared.

[0054]Add agent A and agent B of the above prepared agent solution directly to the test water in the ratio of weight ratio A:B=1:1 to carry out the rotating test, and add 150mg L of agent A -1 , do...

Embodiment 3

[0064] Preparation process: prepare 100.00g each of environment-friendly composite pre-film agent A and B

[0065] Preparation of agent A: 60.00g of 2-phosphonic acid group-1,2,4-tricarboxylic acid butane (PBTCA) with a solid content of 50% and 3.60g of acrylic acid / 2-methyl-butane with a solid content of 30% Mix and stir 2'-acrylamidopropanesulfonic acid binary copolymer (AA / AMPS) and 19.60 g of water evenly, then add 16.80 g of zinc sulfate heptahydrate and stir to dissolve, and obtain 100.00 g of the required A agent.

[0066] The preparation of agent B: 31.20g solid content is 40% sodium polyepoxysuccinate and 64.50g water mix and stir, then add 2.00g of benzotriazole and 2.30g of sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) Stir and dissolve to obtain 100.00g of B agent to be prepared.

[0067] Add agent A and agent B of the above prepared agent solution directly to the experimental water in the ratio of weight ratio A:B=1:1 to carry out the rotary hanging test, and ...

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Abstract

The invention belongs to the circulating cooling water treatment technical field, and refers in detail to an environment-protecting composite pretreatment filming agent used for the pre-treatment filming in a circulating cooling water system and a use method thereof. The environment-protecting composite pretreatment filming agent comprises the main components of 2-phosphonobutane- 1, 2, 4-tricarboxylic acid and sodium of polyepoxysuecinic acid as well as a proper amount of carboxylic acid copolymer, benzotriazole, sodium molybdate, zinc sulphate and so on. When used, the composite pre-treatment filming agent is added into the circulating cooling water directly, and a corrosion-resistant protecting film is formed after 48 years of operation, the corrosion resistance of which to the standard copper sulphate drip solution is far better than the traditional phosphor-zinc pretreatment filming agent. The total phosphor content of the environment-protecting composite pretreatment filming agent is less than 7.5mg / l, and the water pH value does not have to be adjusted. After the pretreatment filming, the water is clear and transparent, and the normal operation can be started without replacing the water. Thus, not only the water to be replaced is saved, but also the chemical base investment expense during the normal operation after the water replacement is reduced. Meanwhile, no waste liquor of pretreatment filming is discharged, so the invention belongs to the environment-friendly pretreatment filming method.

Description

technical field [0001] The invention belongs to the technical field of circulating cooling water treatment, and relates to an environment-friendly composite pre-filming agent used for pre-filming treatment of circulating cooling water system and its use method, in particular to a compound pre-filming agent for no acid addition, no pre-filming after pre-filming The replacement water quality can be directly converted into an environment-friendly composite pre-film agent for a circulating cooling water system in normal operation and its usage method. Background technique [0002] Pre-film is one of the essential and important links in industrial water treatment technology, and an important means to improve the corrosion resistance of circulating water equipment. Its purpose is to form a dense and corrosion-resistant protection layer on the metal surface after chemical cleaning. membrane. For the same circulating cooling water treatment formula, whether it is pre-coated or not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/167C02F5/14
CPCC23F11/08
Inventor 张冰如李风亭
Owner TONGJI UNIV
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