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    煤粉鍋爐等離子體點火技術
    低NOx優化燃燒技術
    煤粉鍋爐微油點火技術
    typical case
    典型案例

    華電西塞山電廠2×680MW等離子體點火項目

    2018-12-09文章來源:原創文章

    1、工程概況

      華電西塞山電廠位于湖北黃石市西塞山區,其二期2×680MW采用哈爾濱鍋爐廠有限責任公司生產的超超臨界參數、單爐膛、一次再熱、平衡通風、露天布置、固態排渣、全鋼構架、全懸吊結構的Π型直流鍋爐。燃燒器采用三菱重工(MHI)的墻式切圓低NOx PM(Pollution Minimum)擺動式燃燒器,共設置6層。制粉系統為熱一次風正壓直吹式制粉系統,每臺爐配6臺HP1003Dyn中速磨煤機,5臺運行,1臺備用。

      2、煤質特性

      設計和校核煤種的煤質成分分析見下表:

      3、等離子燃燒器改造方案

      根據本鍋爐的結構及燃燒器布置特點,等離子燃燒器的改造方案如下:

      (1)將鍋爐最底層A磨對應的4臺PM濃淡燃燒器改為等離子點火燃燒器;

      (2)將等離子體點火燃燒器布置在原PM燃燒器的濃煤粉風室里,以滿足等離子體燃燒器的布置需要,不改變鍋爐的空氣動力場;

      (3)取消PM燃燒器分離器,將PM燃燒器濃淡相燃燒器合二為一,變為一只直流燃燒器。PM燃燒器原來的垂直濃淡被等離子體燃燒器的中心濃淡替代。

      4、項目運行情況

      本工程等離子體點火系統2010年7月開始安裝, 10月鍋爐開始點火吹管,12月底機組168小時試運結束。期間等離子體點火系統運行平穩可靠,等離子體發生器陰極的壽命突破200h.從吹管開始到168小時試運結束,完全無油運行,實現了湖北省火電機組無油運行零突破,湖北《長江商報》2011年1月8日專門做了相關報道。

      更為突出的是在168小時后的實際運行中,經過運行人員的努力,等離子體點火裝置成功點燃了揮發份Vdaf=17%的劣質燃煤,充分展示了天和技術等離子體發生器的技術特長,拓展了等離子體燃煤點火煤質的應用范圍,意義重大。

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