摘要:通過某電廠1000MW機(jī)組超超臨界鍋爐化學(xué)清洗的實(shí)踐，介紹了清洗系統(tǒng)與流程、清洗工藝及主要監(jiān)控?cái)?shù)據(jù)、清洗及鈍化結(jié)果；提出了清洗施工中的幾條經(jīng)驗(yàn)。檢查結(jié)果表明：除垢率＞95%，鈍化膜均勻致密,腐蝕速率為0.48g/m2.h，平均腐蝕總量為4.80g/m2，無殘留氧化物，無過洗現(xiàn)象和鍍銅現(xiàn)象，整體效果優(yōu)良，為同類型超超臨界直流鍋爐的化學(xué)清洗提供了經(jīng)驗(yàn)。

關(guān)鍵詞: 化學(xué)清洗；1000MW機(jī)組；鈍化；腐蝕速率

Abstract：This article is mainly about the chemical cleaning of a power plant in Zhejiang province with 1000MW unit at capital construction period.Cleaning systems and processes, main monitoring data ,cleaning and passivation of the results are introduced. Some chemical cleaning experiences are proposed.Results showed that corrosion rate(0.48g/m2.h-1) and corrosion total quantity（4.80g/m2.h-1）is little than far the required standards in DL /T794 - 2001 .No residual oxides , no wash-off phenomenon and no copper phenomenon.Uniform and dense film is on the metal surface .In conclusion, the result is beyond well, that provided some lessons and experiences for the future in the country in the type of supercritical once-through boiler chemical cleaning.
Key words：Chemical cleaning ; 1000MW unit ; Passivation; Corrosion rate