【正文】 chemical market. Raw material was premixed and then it was prepared for slurry, the slurry was spray dried, at last, it was packed and stored. Raw material form design, washing powder production process, main equipment, spray drying tower were designed and accessory equipment selected, washing powder production of automatic control, plant layout were designed. The drying tower height is 18m, with its diameter is 5m. This paper can provide theory basis for the process of washing power by spray drying. Key words： Washing powder； Spray drying tower； Process design 1 引 言 洗衣粉是 一種堿性洗滌劑， 是每個家庭必需的 洗滌用品。 普通洗衣粉的工藝流程主要是 原料經過預混合、料漿制備、噴霧干燥 、后混合 、成品輸送包裝與儲運。 6t/hr 普通洗衣粉生產工藝設計 Process Design of Ordinary Washing Powder of 6t/hr 目 錄 摘 要 .................................................................................................................... I Abstract ................................................................................................................. II 引 言 ................................................................................................................... 1 第一章 概述 .......................................................................................................... 2 洗衣粉概述 ....................................................................................................................... 2 洗衣粉的現 狀及發(fā)展前景 ................................................................................................ 2 洗衣粉市場概況 ............................................................................................................. 2 洗衣粉發(fā)展前景 ................................................................................................................ 4 第二章 設計條件及介紹 ...................................................................................... 5 設計任務 ............................................................................................................................ 5 工藝設計條件 .................................................................................................................... 5 配方設計 ............................................................................................................................ 5 工藝流程簡介 .................................................................................................................... 5 第三章 噴霧干燥器的設計 .................................................................................. 8 概述 .................................................................................................................................... 8 噴霧干燥的 特點 ............................................................................................................. 8 工藝設計計算 .................................................................................................................... 8 物料衡算 ......................................................................................................................... 8 熱量衡算 ......................................................................................................................... 8 霧滴干燥所需時間 .......................................................................................................... 10 霧滴臨界含水量 ........................................................................................................... 10 初始滴徑 ....................................................................................................................... 11 汽化潛熱 ....................................................................................................................... 11 導熱系數 ....................................................................................................................... 11 恒速階段物料表面溫度 ............................................................................................... 11 空氣臨界溫度 ............................................................................................................... 11 干燥時間 .......................................................................................................................... 12 霧滴在恒速干燥階段的干燥時間 ............................................................................... 12 霧滴在降速階段的 干燥時間 ....................................................................................... 12 霧滴干燥所需時間 ....................................................................................................... 12 第四章 壓力噴嘴的設計 .................................................................................... 13 噴嘴主要尺寸的確定 ...................................................................................................... 13 霧化角 ........................................................................................................................... 13 流量系數 ....................................................................................................................... 13 噴嘴孔徑 ....................................................................................................................... 13 噴嘴旋轉室尺寸 ........................................................................................................... 13 噴嘴生產能力的計算 ...................................................................................................... 14 空氣心半徑 ................................................................................................................... 14 噴嘴出口處液膜速度及其分速度 ............................................................................... 14 干燥塔主要尺寸的確定 .................................................................................................. 14 塔徑 ............................................................................................................................... 14 塔高 ..........................................................................................................