污泥与塑料低温热解固体产物的燃烧性能研究

Combustion Performance Study of Solid Products from Low Temperature Pyrolysis of Sludge and Plastics

摘要: 采用热压装置对污泥与塑料进行低温热解工艺，利用热重分析、工业分析和元素分析等技术研究不同原料配比、热解温度和热解时间对热解固体产物燃烧特性的影响。结果表明：提高塑料添加比例可以提高热解固体产物的综合燃烧性能指数、热值、挥发分，降低其H/C、O/C值，添加塑料能够明显改善原料热解后的质量产率和能量产率，然而塑料的添加比例对原料热解的产率影响不大；提高热解温度会使热解固体产物的综合燃烧性能指数、热值和挥发分先升高后降低，质量产率、H/C、O/C减少，能量产率在热解温度高于250℃时发生骤降；热解时间的升高会略微降低热解固体产物的综合燃烧性能指数，但是对其它燃烧特性参数的影响却不大。因此，塑料占比对热解固体产物的燃烧性能影响最大，热解温度次之，热解时间对固体产物燃烧性能影响最小。

Abstract: The low temperature pyrolysis process of sludge and plastics was performed by hot pressing device. The effects of different raw material ratio, pyrolysis temperature and pyrolysis time on the combustion characteristics of solid products were studied by thermogravimetric analysis, industrial analysis and elemental analysis. The results show that increasing the proportion of plastics can improve the comprehensive combustion performance index, calorific value and volatile content of solid products, and reduce the H/C and O/C values. Adding plastics can significantly improve the mass yield and energy yield of raw materials after pyrolysis, but the proportion of plastics has little effect on the yield of raw materials during pyrolysis. With the increase of pyrolysis temperature, the comprehensive combustion performance index, calorific value and volatile matter of solid products firstly increase and then decrease, and the mass yield, H/C and O/C decrease. The energy yield plummets when the pyrolysis temperature is higher than 250˚C. The increase of pyrolysis time will slightly reduce the comprehensive combustion performance index of solid products, but has little effect on other combustion characteristics. Therefore, the ratio of plastics has the greatest influence on the combustion performance of solid products, followed by pyrolysis temperature, and pyrolysis time has the least influence on the combustion performance of solid products.