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温度和相对湿度对污泥低温干燥速率的影响

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郑龙, 伍健东, 周兴求, 莫少婷. 温度和相对湿度对污泥低温干燥速率的影响[J]. 环境工程学报, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
引用本文: 郑龙, 伍健东, 周兴求, 莫少婷. 温度和相对湿度对污泥低温干燥速率的影响[J]. 环境工程学报, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
shu
Zheng Long, Wu Jiandong, Zhou Xingqiu, Mo Shaoting. Effects of temperature and relative humidity on drying rate of sludge at low temperature[J]. Chinese Journal of Environmental Engineering, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
Citation: Zheng Long, Wu Jiandong, Zhou Xingqiu, Mo Shaoting. Effects of temperature and relative humidity on drying rate of sludge at low temperature[J]. Chinese Journal of Environmental Engineering, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
shu

温度和相对湿度对污泥低温干燥速率的影响

  • 1.

    华南理工大学环境与能源学院, 工业聚集区污染控制与生态修复教育部重点实验室, 广州 510006

  • 基金项目:

  • 中图分类号: X705

Effects of temperature and relative humidity on drying rate of sludge at low temperature

  • 1.

    Key Lab oratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, College of Environment and Energy, South China University of Technology, Guangzhou 510006, China

  • Fund Project:

  • 摘要: 对脱水污泥进行低温薄层干燥实验,研究了污泥厚度(3、5、7和9 mm)、温度(30、40和50 ℃)、空气相对湿度(20%、40%和60%)、污泥水分比等参数对脱水污泥干燥速率的影响。通过静态溶液法分析不同温度、湿度条件下污泥的平衡含水率,当相对湿度大于60%时,污泥平衡含水率的增长速率急剧增大。污泥低温干燥实验表明,升高温度、降低相对湿度均能够提高污泥的干燥速率,且较适温度、相对湿度分别为40 ℃和20%。采用SPSS软件对影响污泥干燥速率的因素进行偏相关性分析,结果表明,影响因素从大到小排列分别为污泥水分比、温度、相对湿度,且随着污泥厚度的增加,温度、相对湿度与干燥速率的Pearson相关系数的绝对值变大。
    Abstract: Low temperature drying experiments were carried out to study the effect of operating conditions on drying rate of sewage sludge. The parameters such as sludge thickness(3 mm,5 mm,7 mm,9 mm), temperatures(30 ℃,40 ℃,50 ℃), relative humidity(20%,40%,60%) and the moisture ratio of sludge were explored respectively. The equilibrium moisture content(EMC) of sludge was analyzed under the conditions of different temperatures and humidity by the method of saturated salt solutions. Accordingly, when the relative humidity was more than 60%, the growth rate of EMC increased sharply. Thus, the drying experiment results showed that the drying rate of sludge increased with the rising temperature, but decreased with relative humidity addition. The suitable temperature and humidity were 40 ℃ and 20%, respectively. Besides, SPSS software was adopted to study partial correlation analysis of factors that influenced drying rate of sludge, the results indicated that the influencing factors were ordered as follows: moisture ratio, temperature, relative humidity; and the absolute value of Pearson correlation coefficient increased with sludge thickness.
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  • 收稿日期:  2015-03-23
  • 刊出日期:  2016-03-10
郑龙, 伍健东, 周兴求, 莫少婷. 温度和相对湿度对污泥低温干燥速率的影响[J]. 环境工程学报, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
引用本文: 郑龙, 伍健东, 周兴求, 莫少婷. 温度和相对湿度对污泥低温干燥速率的影响[J]. 环境工程学报, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
shu
Zheng Long, Wu Jiandong, Zhou Xingqiu, Mo Shaoting. Effects of temperature and relative humidity on drying rate of sludge at low temperature[J]. Chinese Journal of Environmental Engineering, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
Citation: Zheng Long, Wu Jiandong, Zhou Xingqiu, Mo Shaoting. Effects of temperature and relative humidity on drying rate of sludge at low temperature[J]. Chinese Journal of Environmental Engineering, 2016, 10(2): 922-928. doi: 10.12030/j.cjee.20160264
shu

温度和相对湿度对污泥低温干燥速率的影响

  • 1. 华南理工大学环境与能源学院, 工业聚集区污染控制与生态修复教育部重点实验室, 广州 510006
  • 收稿日期:  2015-03-23
基金项目:

摘要: 对脱水污泥进行低温薄层干燥实验,研究了污泥厚度(3、5、7和9 mm)、温度(30、40和50 ℃)、空气相对湿度(20%、40%和60%)、污泥水分比等参数对脱水污泥干燥速率的影响。通过静态溶液法分析不同温度、湿度条件下污泥的平衡含水率,当相对湿度大于60%时,污泥平衡含水率的增长速率急剧增大。污泥低温干燥实验表明,升高温度、降低相对湿度均能够提高污泥的干燥速率,且较适温度、相对湿度分别为40 ℃和20%。采用SPSS软件对影响污泥干燥速率的因素进行偏相关性分析,结果表明,影响因素从大到小排列分别为污泥水分比、温度、相对湿度,且随着污泥厚度的增加,温度、相对湿度与干燥速率的Pearson相关系数的绝对值变大。

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