Study on incineration characteristics of Tibetan municipal solid wastes mixed with sewage sludge

doi:10.11949/0438-1157.20190307

Abstract

Abstract:

Tibet Autonomous Region has special geographical conditions and a fragile ecological environment. The yield of Tibetan municipal solid waste (MSW) and sewage sludge (SS) has been increasing rapidly due to the development of urbanization and tourism. At present, the main treatment method of MSW/SS is landfill, while incineration is still at trial operation stage, and generally lack of advanced disposal technology. In this study, the characteristics of MSW and SS in the Tibet were investigated. The differences during the incineration process between wastes from Tibet and Tianjin were analyzed in a grate furnace. Also, the incineration characteristics of Tibetan MSW and SS under different mixing ratios was studied. The optimum blending ratio was preliminarily determined to be 4∶1 which reduced the emissions of CO by 23.06%, HCl by 45.51%, and PM by 30.73%. Considering the irreversibility of the ecological environment in Tibet and its strategic role as a national ecological safety barrier, this study provides guidance for pollutant control in the waste incineration process and reference for the engineering application of MSW and SS co-incineration in Tibet.

Key words: Tibet Autonomous Region, municipal solid waste, sewage sludge, combustion, biomass, waste treatment, pollution

摘要：

西藏自然环境条件特殊，生态环境脆弱。随城市化和旅游业快速发展，生活垃圾/污泥产量急增。目前，生活垃圾/污泥仍以填埋为主，焚烧处于试运行，总体上缺乏先进的处置技术。本研究分析了西藏垃圾/污泥的特点；利用层燃焚烧炉分析了西藏和天津垃圾/污泥在焚烧过程中的差异，探讨了西藏垃圾和污泥在不同混合比下的焚烧特性。初步确定了西藏污泥与垃圾混合焚烧的最佳掺混比为4∶1，CO排放降低达23.06%，HCl降低达45.51%，颗粒物浓度降低约30.73%。考虑到西藏生态环境的不可逆转性及其作为国家生态安全屏障的战略性，本研究为其固废混合焚烧处理过程的污染物控制提供了指导，为混合焚烧处理的工程化应用提供参考。

关键词: 西藏自治区, 生活垃圾, 污泥, 焚烧, 生物质, 废物处理, 污染

CLC Number:

X 705

Zeng DAN, Xutong WANG, Beibei YAN, Guanyi CHEN, Peng ZHOU, Wenwu ZHOU, Dazhuoma QIONG. Study on incineration characteristics of Tibetan municipal solid wastes mixed with sewage sludge[J]. CIESC Journal, 2019, 70(8): 3151-3159.

旦增, 王旭彤, 颜蓓蓓, 陈冠益, 周鹏, 周文武, 穷达卓玛. 西藏生活垃圾掺烧市政污泥的焚烧特性研究[J]. 化工学报, 2019, 70(8): 3151-3159.

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