燃料化学学报2022，Vol.50Issue(6)：703-713,11.DOI:10.1016/S1872-5813(21)60189-5
染布厂污泥对高灰熔融温度(AFT)煤灰熔融行为的改性及其机理
Modification of ash fusion behavior of high ash fusion temperature (AFT) coal by textile dyeing sludge addition and its mechanism
摘要
Abstract
To address the slagging problem during coal entrained-flow bed (EFB) gasification, the influences of textile dyeing sludge (TDS) addition on the fusing characteristics of high ash fusion temperature (AFT) coal were explored under a reducing atmosphere. And the change mechanisms were investigated by X-ray diffraction, Fourier Transform Infrared Spectroscopy (FT-IR) and FactSage calculation. The results showed that the flow temperature of high ash fusion temperature (AFT) coal decreased below 1380℃ when the TDS addition reached 20％?25％, which met the requirements of liquid-slag removal for EFB gasification. With the content of TDS increasing, the formations of low-melting minerals (e.g., hercynite, anorthite, and albite) decreased AFT. The bridging oxygen bonds of the network structure were destroyed by metal ions (e.g., Fe2+, Ca2+, Na+), formation of much non-bridged oxygen (NBO) bonds relaxed the silicate network, thus decreasing the AFT. The formations of NBO bonds were confirmed by gradual decreases in the peak strengths of Si?O?Si and Si?O?Al bonds and intensified the vibration of Fe?O and Si?O?M ( M: Ca2+ or Na+) bonds. FactSage calculation results were in good agreement with the experimental ash fusion behavior.关键词
灰熔融行为/染布厂污泥/高AFT煤/改性机理Key words
ash fusion behaviors/textile dyeing sludge/high AFT coal/modification mechanisms分类
化学化工引用本文复制引用
赵超越,李风海,马名杰,李洋,赵薇,张许静,房倚天..染布厂污泥对高灰熔融温度(AFT)煤灰熔融行为的改性及其机理[J].燃料化学学报,2022,50(6):703-713,11.基金项目
The project was supported by the Natural Science Foundation of China(21875059),and the Natural Science Foundations of Shandong Province,China(ZR2018MB037). （21875059）
