Low-zincium organophosphor scale inhibitor for recirculated cooling water process
A corrosion and scale inhibitor, organic phosphorus technology, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc., can solve problems such as environmental pollution, excessive zinc content, low zinc content, etc. , to achieve the effect of eliminating environmental pollution
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Embodiment 1
[0017] From February to April 2005, the energy workshop of the cold rolling sheet factory determined the composition, proportion and dosage of the corrosion and scale inhibitor of the present invention through static scale inhibition test, rotary coupon corrosion test, chemical screening test, and chemical compatibility test. And found that the oxidizing bactericide used has no adverse effect on the corrosion and scale inhibitor of the present invention. The dynamic simulation test at the end of March and the beginning of April 2005 further verified the performance of the formula and determined the consumption of the corrosion and scale inhibitor of the present invention. The components and weight percentages of the low zinc corrosion and scale inhibitor of the present invention are shown in Table 1 .
[0018] Table 1. Contents and functions of each component in the test formula
[0019] main component
Proportion (%)
effect
Phosphonic acid (PBTC)...
Embodiment 2
[0024] The preparation process of the corrosion and scale inhibitor of the present invention: prepare 100 grams of medicament solution
[0025] 22 grams of PBTC with a solid content of 50%, 10 grams of HEDP with a solid content of 50%, 6 grams of organic phosphate, and 20 grams of a terpolymer of AA / AMPS / HPA with a solid content of 30% were stirred and dissolved in 38.5 grams of purified water , and then 3 grams of zinc sulfate heptahydrate were dissolved in the above solution, and finally 0.5 gram of hydrogen peroxide was added and mixed uniformly.
[0026] When adding 100 grams of the prepared medicament solution to the cooling water at a concentration of 100mg / L, each single component is the required concentration, that is, PBTC, HEDP, organic phosphate, AA / AMPS / HPA, zinc in circulating water The effective concentrations of ions are 11mg / L, 5mg / L, 3mg / L, 6mg / L and 0.68mg / L respectively.
Embodiment 3
[0028] Preparation process: prepare 100 grams of medicinal solution
[0029] 22 grams of PBTC with a solid content of 50%, 10 grams of HEDP with a solid content of 50%, 6 grams of organic phosphate, and 20 grams of a terpolymer of AA / AMPS / HPA with a solid content of 30% were stirred and dissolved in 39.5 grams of purified water , and then 2 grams of zinc sulfate heptahydrate were dissolved in the above solution, and finally 0.5 gram of hydrogen peroxide was added and mixed uniformly.
[0030] When adding 100 grams of the prepared medicament solution to the cooling water at a concentration of 100mg / L, each single component is the required concentration, that is, PBTC, HEDP, organic phosphate, AA / AMPS / HPA, zinc in circulating water The effective concentrations of ions are 11mg / L, 5mg / L, 3mg / L, 6mg / L and 0.45mg / L respectively.
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