| 水体疏浚底泥利用现状与能源化利用 |
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| 引用本文： | 李钢,韩明爽,徐海红.水体疏浚底泥利用现状与能源化利用[J].环境工程,2021,39(6):55. |
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| 作者姓名： | 李钢 韩明爽 徐海红 |
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| 作者单位： | 河南工程学院资源与环境学院,郑州451191;中冶建筑研究总院有限公司环保分公司,北京100088;生态环境部环境工程评估中心,北京100012 |
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| 基金项目： | 河南省高新技术领域科技攻关项目"市政污泥催化热解机理及单金属氧化物催化剂的研究"（132102210462） |
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| 摘 要： | 我国河湖众多，水体疏浚底泥具有污染物含量较高、成分复杂、量大的特点。介绍了国内疏浚底泥利用现状，提出了能源化利用底泥处理方向。热解技术具有处理彻底、固化重金属、基本无污染气体排放、可进行能源回收等优点，而催化热解能够促进提高底泥热解效率并控制反应产物分布。通过对底泥添加合适金属氧化物催化剂后进行热解处理，发现在热解低温段（<300℃），添加催化剂剂量>2%时，热解气态产物中氢占比可提高约50%。催化热解后固相产物热解半焦的产率为40%~45%，热解处理后底泥减容效果好。
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| 关 键 词： | 底泥 热化学转化 能源化 催化 |
| 收稿时间： | 2020-06-29 |
UTILIZATION OF SEDIMENTS DREDGED FROM WATER BODIES AND ITS ENERGY REUTILIZATION |
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| Affiliation: | 1. School of Resource & Environment, Henan University of Engineering, Zhengzhou 451191, China;2. Environmental Branch, Central Research Institute of Building & Construction Co., Ltd, MCC, Beijing 100088, China;3. Appraisal Center for Environment & Engineering Ministry of Ecology and Environment, Beijing 100012, China |
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| Abstract: | There were a great number of rivers and lakes in China, and the constituent of sediments dredged from waters had the characteristics of high complexity and large quantity. In this paper, the utilization of dredged sediment was introduced, and its energy reutilization was put forward. The pyrolysis should be considered seriously, due to its advantages of solidification of heavy metals in sediments, less pollution emission and energy recovery. Adding suitable catalysts could improve the pyrolysis efficiency and control the distribution of reaction products. By adding suitable metallic oxide catalysts to sediments for pyrolysis, it was found that in the low-temperature pyrolysis(below 300℃), when the dosage of catalysts was 2% above, the hydrogen proportion in gas phase products could increase by about 50%. After catalytic pyrolysis treatment, the yield of biochar was 40%~45%, and the volume of solid phase products was significantly reduced. |
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