Cleaning method of simple substance copper scales
A copper scale and elemental technology, applied in the field of chemical cleaning of boilers in thermal power plants, can solve problems such as poor removal of copper scale, and achieve the effect of avoiding hidden dangers and ensuring safe production.
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Embodiment 1
[0038] The pharmaceutical raw materials used in each step are all in mass fraction:
[0039] (1) For the first copper removal, mix and wash with the following pharmaceutical raw materials for 3 hours,
[0040] Water: 96kg;
[0041] Ammonium persulfate: 1.0kg;
[0042] Sodium hexametaphosphate: 0.2kg;
[0043] Sodium fluoride: 0.1kg;
[0044] (2) For the first pickling, mix with the following medicament raw materials and wash for 7 hours; then rinse with water for 1 hour;
[0045] Water: 95kg;
[0046] 36% hydrochloric acid, ρ is 1.18g / ml: 4kg;
[0047] IS156 corrosion inhibitor: 0.2kg;
[0048] (3) For the second copper removal, after mixing with the following pharmaceutical raw materials, wash for 1 hour;
[0049] Water: 98kg;
[0050] Ammonium persulfate: 0.2kg;
[0051] 25% ammonia water, ρ is 0.90g / ml: 0.5kg;
[0052] Sodium hexametaphosphate: 0.1kg;
[0053] Sodium fluoride: 0.1kg;
[0054] (4) For the second pickling, mix with the following pharmaceutical raw...
Embodiment 2
[0064] The pharmaceutical raw materials used in each step are all in mass fraction:
[0065] (1) For the first copper removal, mix and wash with the following pharmaceutical raw materials for 4 hours,
[0066] Water: 97kg;
[0067] Ammonium persulfate: 1.5kg;
[0068] Sodium hexametaphosphate: 0.35kg;
[0069] Sodium fluoride: 0.2kg;
[0070] (2) For the first pickling, mix with the following pharmaceutical raw materials, wash for 8 hours, and then rinse with water for 2 hours;
[0071] Water: 95.5kg;
[0072] 37% hydrochloric acid, ρ is 1.18g / ml: 4.5kg;
[0073] IS156 corrosion inhibitor: 0.25kg;
[0074] (3) For the second copper removal, mix with the following pharmaceutical raw materials and wash for 2 hours;
[0075] Water: 98.5kg;
[0076] Ammonium persulfate: 0.35kg;
[0077] 27% ammonia water, ρ is 0.88g / ml: 0.75kg;
[0078] Sodium hexametaphosphate: 0.2kg;
[0079] Sodium fluoride: 0.2kg;
[0080] (4) For the second pickling, after mixing the following pharm...
Embodiment 3
[0090] The pharmaceutical raw materials used in each step are all in mass fraction:
[0091] (1) For the first copper removal, mix and wash with the following pharmaceutical raw materials for 5 hours,
[0092] Water: 98kg;
[0093] Ammonium persulfate: 2.0kg;
[0094] Sodium hexametaphosphate: 0.5kg;
[0095] Sodium fluoride: 0.3kg;
[0096] (2) For the first pickling, mix with the following pharmaceutical raw materials and wash for 9 hours; then rinse with water for 3 hours;
[0097] Water: 96kg;
[0098] 38% hydrochloric acid, ρ is 1.19 g / ml: 5kg;
[0099] IS156 corrosion inhibitor: 0.3kg;
[0100] (3) For the second copper removal, after mixing with the following pharmaceutical raw materials, wash for 3 hours;
[0101] Water: 99kg;
[0102] Ammonium persulfate: 0.5kg;
[0103] 28% ammonia water, ρ is 0.88 g / ml: 1.0kg;
[0104] Sodium hexametaphosphate: 0.3kg;
[0105] Sodium fluoride: 0.3kg;
[0106] (4) For the second pickling, mix with the following pharmaceut...
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