FIELD: boiler and feed water treatment by chemical agents at thermal power stations. SUBSTANCE: method involves introduction of sodium phosphate, sodium hydroxide, ammonium, and hydrazine. Sodium hydroxide is introduced in feed water with concentration not over 300-400 mcg of NH3/kg of water. EFFECT: six or seven times reduced carry-over of chemically active chlorides from boiler water to steam path thereby improving operating reliability of steam-turbine rotating blades, eliminated troubles in condenser tubes due to ammonia corrosion; reduced dose of ammonia introduced in power unit cycle which causes three times increase in economic efficiency and reduced pollution of environment. 4 dwg
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