FIELD: thermal power industry, particularly, chemical cleaning from high-temperature mineral deposits of steam and hot-water boilers. SUBSTANCE: composition comprises nitrile (methylenephosphonic) acid, methyliminodimethylene phosphonic acid, hydrochloric acid and acid corrosion inhibitor, ratios of components being as follows, wt.%: nitriletri-(methylenephosphonic) acid, 14-16; methylimino dimethylene phosphonic acid, 4-7; hydrochloric acid, 1-14; acid corrosion inhibitor, 0.5-1.0; and water, the balance. EFFECT: removal of high-temperature mineral deposits, improved cleaning efficiency, reduced volume of sewage after washing operation.
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Authors
Dates
2001-12-27—Published
2000-05-12—Filed