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Phosphorus-free prefilming agent for prefilming treatment of circulating cooling water system and application method thereof
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A technology of circulating cooling water and pre-filming agent, which is applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc. It can solve the problems of phosphorus pollution and achieve complete non-phosphorus discharge and corrosion resistance Good performance and save running time
Active Publication Date: 2012-05-30
CHANGZHOU KEWEI TIANSHI ENVIRONMENTAL TECH
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[0005] In order to overcome the deficiency that a considerable amount of phosphorus pollutes the environment in the existing pre-film water treatment technology, the present invention provides a phosphorus-free pre-film agent for pre-film treatment of circulating cooling water systems and its application method
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Embodiment 1
[0039] Preparation process: Add 35.6g of water, start stirring, then add 12.0g of industrial sucrose, 11.4g of zinc sulfate heptahydrate, 18g of sulfonated styrene maleic anhydride copolymer and H 2 SO 4 1.5 g, and finally add 21.5 g of acrylic acid / methyl acrylate / hydroxypropyl acrylate / isopropanol tetrapolymer, and stir for 1 hour to completely dissolve it.
[0040] Add the above prepared medicament directly to the test water to carry out the rotary hanging plate test, the concentration of the dosing is 400mg / L, the test temperature is 45°C, the test time is 48h, and the quality of the test water is: Ca 2+ (as CaCO 3 Total) 147mg.L -1 , total alkalinity (as CaCO 3 Total) 103.4mg.L -1 , Cl - 75mg.L -1 , SO 4 2- 35.2mg.L -1 ,PH7.65. The test results are shown in Table 1.
Embodiment 2
[0042]Preparation process: Add 37.7g of water, start stirring, then add 8.0g of industrial sucrose, 10.8g of zinc sulfate heptahydrate, 16.5g of sulfonated styrene maleic anhydride copolymer and H 2 SO 4 2.0 g, and finally add 25.0 g of acrylic acid / methyl acrylate / hydroxypropyl acrylate / isopropanol tetrapolymer, and stir for 1 hour to completely dissolve it.
[0043] Add the prepared agent above directly into the test water to carry out the rotary hanging plate test, the concentration of the dosing is 400 mg / L, the test temperature is 45°C, the test time is 48h, and the quality of the test water is: Ca 2+ (as CaCO 3 Total) 147mg.L -1 , total alkalinity (as CaCO 3 Total) 103.4mg.L -1 , Cl - 75mg.L -1 , SO 4 2- 35.2mg.L -1 ,PH7.65. The test results are shown in Table 1.
Embodiment 3
[0045] Preparation process: Add 31.3g of water, start stirring, then add 11.0g of maltose, 11.2g of zinc sulfate heptahydrate, 17.0g of sulfonated styrene maleic anhydride copolymer and H 2 SO 4 1.5 g, and finally add 28.0 g of acrylic acid / methyl acrylate / hydroxypropyl acrylate / isopropanol tetrapolymer, and stir for 1 hour to completely dissolve it.
[0046] Add the prepared agent above directly into the test water to carry out the rotary hanging plate test, the concentration of the dosing is 400 mg / L, the test temperature is 45°C, the test time is 48h, and the quality of the test water is: Ca 2+ (as CaCO 3 Total) 147mg.L -1 , total alkalinity (as CaCO 3 Total) 103.4mg.L -1 , Cl - 75 mg.L -1 , SO 4 2- 35.2mg.L -1 ,PH7.65. The test results are shown in Table 1.
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Abstract
The invention relates to the technical field of circulating cooling water treatment, in particular to a phosphorus-free prefilming agent for prefilming treatment of a circulating cooling water system and an application method thereof. The phosphorus-free prefilming agent is prepared from quadripolymers used as the main components, and right amounts of zinc sulfate, disaccharides, sulfonated styrene-maleic anhydride copolymer, sulfuric acid, water and the like. The prefilming agent provided by the invention can be directly added into circulating cooling water to prefilm the equipment and pipelines to be put into normal operation, and the addition amount of the prefilming agent is 300-500 mg / L. When using the prefilming agent, the PH value of the water does not need to be regulated, and the normal operation can be directly carried out without replacing the water after the prefilming, thereby saving the prefilming agent and abundant industrial water. Further, the prefilming agent is free of phosphorus, and the prefilming waste liquor without phosphorus can be discharged, thereby avoiding water body pollution and satisfying the national requirements of energy saving, emission reduction and environmental protection.
Description
technical field [0001] The invention relates to the technical field of circulating cooling water treatment, in particular to a phosphorus-free pre-filming agent for pre-filming treatment of a circulating cooling water system and a method for using the same. Background technique [0002] Pre-film is one of the essential and important links in industrial water treatment technology, and it is an important means to improve the corrosion resistance of circulating water equipment. Its purpose is to form a dense and corrosion-resistant protective film on the metal surface after chemical cleaning. So as to protect the equipment and prolong the service life of the equipment. [0003] At present, the pre-film agent for industrial circulating water treatment often adopts the traditional pre-film agent, that is, the inorganic phosphorus-zinc pre-film agent. Betz 807 uses hexabia and zinc sulfate (ratio 4:1), the usage amount is 400-600PPm, and the pre-film time is 48 Hour. The pH need...
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Application Information
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