UTILIZATION OF SEDIMENTS DREDGED FROM WATER BODIES AND ITS ENERGY REUTILIZATION
-
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。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.
-
Key words:
- sediment /
- thermo-chemical conversion /
- energy reutilization /
- catalysis
-
[1] 中华人民共和国水利部.2018年中国水资源公报[Z].http://www.mwr.gov.cn/sj/tjgb/szygb/201907/t20190712_1349118.html [2] 徐祖信,张锦平,廖振良,等.苏州河底泥对上复水水质污染影响[J].城市环境与城市生态,2005,18(6):1-3. [3] 邹联沛,章萍,钱光人.底泥原地稳定化过程中药剂对上覆水体的影响[J].水科学进展,2008,19(4):494-499. [4] 沈亦龙,何品晶,邵立明.太湖五里湖底泥污染特性研究[J].长江流域资源与环境,2004,13(6):584-588. [5] 张锡辉.水环境修复工程学原理与应用[M].北京:化学工业出版社,2002. [6] 喻阳华,陈程,吴永贵,等.厌氧条件下深谷型湖泊底泥覆盖效果研究[J].环境工程,2015,33(2):53-57. [7] 陈兴茹,白音包力皋.城市河湖底泥固化效益评估研究[J].中国水利水电科学研究院学报,2015,13(1):54-61. [8] 张静霞,韩涛,朱建裕,等.生物淋滤技术修复重金属污染河流底泥研究进展[J].环境工程,2015,33(5):157-159. [9] 洪祖喜,何品晶,邵立明.水体受污染底泥原地处理技术[J].环境保护,2002(10):15-17. [10] 何品晶,邵立明,顾国维.市政淤泥脱水固化技术研究[J].中国市政工程,2000(3):48-51. [11] 杨莉,梁启斌.滇池草海疏浚底泥脱水实验[J].中国资源综合利用,2012,30(2):37-40. [12] 何品晶,顾国维,李笃中.城市污泥处理与利用[M].北京:科学出版社,2003. [13] 周克元,蒋益民,江惠龙,等.实用环境保护数据大全.第2分册[M].长沙:湖南人民出版社,1993. [14] 国家环境保护总局科技标准司.中国湖泊富营养化及其防治研究[M].北京:中国环境科学出版社,2001. [15] 滑丽萍,华珞,高娟,等.中国湖泊底泥的重金属污染评价研究[J].土壤,2006,38(4):366-373. [16] 包旭辉,闫振华,陆光华.我国淡水中微塑料的污染现状及生物效应研究[J].水资源保护,2019,35(6):115-123. [17] 伍贤益.利用湖泊淤泥生产煤矸石空心砖[J].砖瓦,2005(11):12-14. [18] 毕涛,张亦楠,蒋玉广,等.水库底泥制备陶粒技术应用研究[J].环境研究与监测,2014,27(4):1-3. [19] 杨欣妍,魏儒平,杨柳燕污泥底泥制备陶粒及除磷潜力研究[J].生态与农村环境学报,2019,35(3):369-376. [20] 张春雷,管非凡,李磊,等.中国疏浚淤泥的处理处置及资源化利用进展[J].环境工程,2014,32(12):95-99. [21] 武博然,柴晓利.疏浚底泥固化改性与资源化利用技术[J].环境工程学报,2016,10(1):335-342. [22] 叶春梅,吴建强,黄沈发,等.复配材料固化/稳定化重金属污染底泥研究.环境工程.https://kns.cnki.net/kcms/detail/11.2097.X.20200612.1612.004.html. [23] 赵汝东,胡义镰,Ed Barrett-Lennard,等.河湖底泥对农田土壤性状及DTPA态重金属的影响[J].农业环境科学学报,2015,34(1):97-102. [24] 朱广伟,陈英旭,王凤平,等.城市河道疏浚底泥农田应用的初步研究[J].农业环境保护,2001,20(2):101-103. [25] 朱广伟,陈英旭,王凤平,等.景观水体疏浚底泥的农业利用研究[J].应用生态学报,2002,13(3):335-339. [26] 王国华,孙晓,张辰,等.污水污泥送火力发电厂焚烧的环境风险研究进展[J].给水排水,2006,32(6):20-23. [27] 谢胜禹,余广炜,李杰,等.污泥水热联合热解处理对固相产物中重金属的影响[J].环境工程学报,2018,12(7):2114-2122. [28] 徐强,刘明,张春敏.污泥处理处置新技术、新工艺、新设备[M].北京:化学工业出版社,2011. [29] 张秀梅,陈冠益,孟祥梅,等.催化热解生物质制取富氢气体的研究[J].燃料化学学报,2004,32(4):446-449.
点击查看大图
计量
- 文章访问数: 299
- HTML全文浏览量: 34
- PDF下载量: 17
- 被引次数: 0