回转式烘干机除尘系统改造设计

１ 问题的提出某水泥厂紧邻城市，该厂的φ１．５ × １２ ｍ回转式烘干机主要用于烘干白垩石，且根据工艺条件其产量必须在３０ｔ／ｈ以上才能满足生产要求。该烘干机原配的除尘系统为二级除尘，一级采用ＣＬＴ／Ａ－６ × ５．０旋风除尘器，二级采用水浴收尘器。由于该物料含水量较大，烘干机产量高，废气排放量大、粉尘高、湿度大，实际除尘效果很不理想，除尘后排放浓度仍高达１０００ｍｇ／ｍ３以上，远远高于国家一类区域小于１５０ ｍｇ／ｍ３［１］的排放标准，同时还存在用水量大，水除尘形成的泥浆处理困难等问题。因此对此烘干…

Design and Reconstruction of the dust Collecting System in the Rotary Dehydrator

The original dust collecting system in the rotary dehydrator for drying chalk stone is consist of two stages the first is cyclone dust collector, the second is water- bathing dust collector. Due to wet chalk stone, higher yield and powder mote, the density of dust form bleed off stack is still amount to 1000/m3 over the 150mg/ m3 which is the national standard of China (GB4915). In the paper, the three- stage dust collecting system is introduced, the first is sedimentation chamber, the second is cyclone dust conductor, and the last is baghose precipitator. According to the three-stage system, a new dust collecting system in the rotary dehydrator is reconstructed, the density of dust form is lower than 115mg/m3.