在低温干燥条件下用CaO和粉预先调节的污水泥的干燥特性
Qunli Zhang1,2, Baozhong Wang1,2, Yuhao Xing1,2
1Beijing Municipality Key Lab of Heating, Gas Supply, Ventilation and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing, People's Republic of China.
Environmental technology
|March 25, 2024
概括
热干燥使用低温有效地从污泥中去除水. 添加CaO和粉等材料显著提高了干燥速度,空气温度是关键因素.
科学领域:
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
- 材料科学 是一种材料科学.
背景情况:
- 热干燥为污泥管理提供了一种可持续的,低碳的方法.
- 优化热干燥器的效率对于有效的污泥脱水至关重要.
- 低工作温度 (低于70°C) 给快速污泥干燥带来了挑战.
研究的目的:
- 研究空气参数和添加剂对低温污泥干燥特性的影响.
- 提高热污泥干燥工艺的效率和速度.
- 用热技术确定加速污泥脱水的最佳条件.
主要方法:
- 泥干燥实验是在受控的温度范围 (50-70°C) 和空气速度范围 (0.5-1.7 m/s) 内进行的.
- 评估了添加剂,特别是CaO和粉对污泥干燥速度的影响.
- 使用包括双向ANOVA在内的统计分析来确定空气温度和速度的意义.
- 干燥数据与五个参考模型相匹配,以评估预测准确度.
主要成果:
- 增加的空气温度,空气速度和添加剂比率明显加快了污泥干燥过程.
- 与未经处理的污泥相比,用CaO和粉预处理的污泥的平均 (14.23%) 和最大 (25.71%) 干燥速度有所改善.
- 空气温度对污泥干燥速度的影响比空气速度更大,正如ANOVA指出的那样.
- 佩奇模型显示了最高的确定系数 (R2),这表明它更适合预测低温污泥干燥时间.
结论:
- 空气参数和添加剂在增强低温热污泥干燥方面是有效的.
- 氧和粉显示出作为添加剂的显著潜力,可以提高污泥脱水效率.
- 佩奇模型提供了一种可靠的工具,用于预测这些条件下污泥干燥的持续时间.
- 优化热干燥参数可以导致更高效和可持续的污泥管理.
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