The paper presents the background, technical program, constructive program and engineering costs of system reform of kiln trail dust col ector for 3000t/d cement production line in Nanyang Hangtian Cement Plant. The fol owing program is:one similar bag dust col ector is paral el connected at the bag col ector with reversing blower and spun glass of high tempera-ture in original kiln trail, so as to increase the filtering area of kiln trail bag dust col ector and decrease the filtering wind speed. The reform shows an obvious result.% 介绍了南阳航天水泥厂3000t/d水泥生产线窑尾收尘系统的改造背景、技术方案、施工方案和工程造价。改造采用了在原窑尾反吹风高温玻纤袋收尘器旁并联一台同类型单排袋式收尘器的方案，以增大窑尾袋收尘器过滤面积和降低过滤风速。该窑尾收尘系统的改造取得了明显的成效。
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