城市生活垃圾成灰特性的实验研究

Experimental Research on City Life Garbage Ash Characteristics

对承德环能热电有限责任公司CFB锅炉炉前垃圾按照CJ/T313-2009进行分类,通过静态燃烧加振筛磨耗的方法获得垃圾中可燃成分的成灰特性。垃圾中可燃成分成灰占总灰约为29%,成灰粒径均小于1 mm,其中小于0.5 mm的占80%~90%,而且近50%为可循环灰,能够满足CFB锅炉物料平衡和物料循环的需要。垃圾中不可燃成分成灰占比约71%,而且几乎全部是无效物料,是垃圾焚烧CFB锅炉床温低、床压高的主要原因。研究合理的垃圾前处理技术,降低不可燃成分的含量,是垃圾焚烧CFB锅炉提高运行性能、降低运行成本的有效途径。

This paper classified the garbage in Chengde Energy Thermoelectricity Limited Corporation Co.,Ltd CFB boiler in accordance with the CJ/T313-2009,and obtained the ash characteristics of combustible components in garbage through the static combustion and vibration sieve wear method.The ash of combustible components in garbage accounts for about 29%in total ash;all dust particle size is less than 1 mm,among which those less than 0.5 mm accounts for 80%~90%,and nearly 50%of which is circulating ash.CFB boiler can meet the material balance and material circulation needs.The ash of non-combustible components accounts for about 71%in total ash,and almost all of the material is invalid.It is the main reason to reduce CFB boiler bed temperature and raise bed pressure.It is effective to improve the operation performance and to reduce operating costs of garbage incineration boiler CFB by studying processing technology for garbage in front of CFB boiler and reducing the content of non-combustible components.