The invention discloses a sealing recovery system of a rotary air preheater, including internal dynamic and static sealing mechanism, external recovery mechanism, automation control mechanism, the internal dynamic and static sealing mechanism comprises a sealing piece and axial sealing shell, center sealing cylinder, the left and right sealing stator, rotor mounted on next, the radial, left and right sealing are fixedly connected to the stator includes upper and lower fan plate and vertical arc panel, fan-shaped plate and arc panel are equipped with deflector isolated, an array of upper and lower fan plates and vertical arc panel width in static less while covering the respective the sealing piece; the upper and lower quadrant and circular plate is provided with a plurality of elongated holes arranged in a straight line, the long hole section in the shape of \V\; the invention has low leakage rate, low energy consumption, low failure rate, the With the advantages of long life, the zero discharge of the air preheater can be realized. The utility model has the epoch-making significance, and the output energy consumption is only 15% of the energy consumption, and the economic value is high.
【技术实现步骤摘要】
本专利技术涉及一种用于回转式空气预热器的密封回收系统。
技术介绍
上世纪80年代初,我国因亚临界火力发电机组配备需要,全套引进美国漏风率为 10%的、以受热面旋转的回转式空气预热器,用以淘汰原苏联设计漏风率为20%的的风罩式 空预器。回转式空气预热器是目前大型火力发电厂及化工行业必配的辅助设备,其主要用 途就是利用锅炉尾部的烟气来加热冷空气,向锅炉提供干燥煤粉和炉膛助燃的热空气;工 作时,空气预热器的转子携带受热面在设备内勻速转动,锅炉尾部的高温烟气在引风机吸 引下从上而下穿过空预器位于烟气侧正在旋转的转子受热面,受热面由此被加热,烟气被 冷却,当被加热的受热面旋转至空气侧时,冷空气在送风机推动下由下往上穿过受热面,吸 收热量形成热空气,被冷却的受热面又旋转至烟气侧被加热,由此周而复始、往复循环,源 源不断地向锅炉提供热空气,由此回转式空预器成为大型火力发电锅炉正常运行的关键设 备。由于回转式空预器同时贯穿在锅炉烟一风系统中,空气和烟气因回转式空预器而 联通,空气的正压与烟气的负压同在设备内而形成压差,因此设备内必须具有密封系统,以 阻止热空气在压差作用下通过 ...
【技术保护点】
一种回转式空气预热器的密封回收系统,包括内部动、静密封机构、外部回收机构、自动化控制机构,所述内部动、静密封机构包括外壳、左、右密封定子、安装在转子每块隔板上的上、下径向密封片和边缘的轴向密封片,左、右密封定子均包括固联的上、下扇形板和纵向的圆弧面板,上、下扇形板和圆弧面板均内设相互隔离的导流室,上、下扇形板分别与外壳的上、下梁固联;外部回收机构包括与各导流室连通的数根风管、与风管连接的储存容器、座落在地面的回收风机、电源柜、以及排风管,其特征在于所述上、下扇形板和纵向的圆弧面板的宽度在静态时至少同时覆盖各自对应的数组密封片;在上、下扇形板和圆弧面板的内侧均设有数个呈直线排 ...
【技术特征摘要】
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