Experimental study on ash melting and slagging characteristics of herbaceous biomass in northeast China

ZHOU Weijian; PAN Peiyuan; ZHANG Naiqiang

doi:10.19666/j.rlfd.202107123

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Experimental study on ash melting and slagging characteristics of herbaceous biomass in northeast China

Thermal Power Generation Vol. 51, Issue 3, Pages: 60-69(2022)

更新时间：2025-09-28

- Experimental study on ash melting and slagging characteristics of herbaceous biomass in northeast China
- 作者机构：
  
  华北电力大学能源动力与机械工程学院国家火力发电工程技术研究中心电站能量传递转化与系统教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202107123
  CLC： TK6;TM619
- Published：2022
- 稿件说明：
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ZHOU Weijian, PAN Peiyuan, ZHANG Naiqiang. Experimental study on ash melting and slagging characteristics of herbaceous biomass in northeast China[J]. Thermal Power Generation, 2022, 51(3): 60-69.
DOI：

ZHOU Weijian, PAN Peiyuan, ZHANG Naiqiang. Experimental study on ash melting and slagging characteristics of herbaceous biomass in northeast China[J]. Thermal Power Generation, 2022, 51(3): 60-69. DOI： 10.19666/j.rlfd.202107123.

摘要

选取我国东北地区7种典型生物质为研究对象，通过X射线衍射谱图分析、X射线荧光光谱分析、扫描电子电镜形貌分析和X射线能谱分析，结合生物质灰的灰熔融温度测定结果、生物质灰锥面积收缩率曲线以及由碱金属氧化物（K_2O、Na_2O）、碱土金属氧化物（MgO、CaO）和Al_2O_3、SiO_2组成的三元体系，对7种典型生物质灰的沾污特性及结渣倾向进行了研究，并针对软化温度提出了新的预测生物质灰结渣的指标J。结果表明：当J1，生物质灰具有严重结渣倾向；当1≤J2，生物质灰具有中等结渣风险；当J≥2，生物质灰具有较低结渣风险。该结论为减少生物质锅炉或生物质燃煤耦合发电锅炉的结渣现象提供了新的参考指标。

Abstract

Seven typical biomass species in northeast China are selected as the research objects

through X-ray diffraction(XRD) spectrum analysis

X-ray fluorescence(XRF) spectrum analysis

scanning electron microscopy(SEM) topography analysis and X-ray energy spectrum analysis(EDS)

combined with the measurement results of the ash melting temperature of biomass ash

the area shrinkage rate curve of biomass ash cone

and the ternary composed of alkali metal oxides(K_2O

Na_2O)

alkaline earth metal oxides(MgO

CaO) and Al_2O_3

SiO_2 system

as well as the fouling characteristics and slagging tendency of 7 typical biomass ash

were studied. Moreover

a new index J for predicting biomass ash slagging was proposed for the softening temperature. The results show that: when J1

the biomass ash has a serious slagging tendency; when 1≤J2

the biomass ash has a moderate slagging risk;when J≥2

the biomass ash has a low slagging risk. This conclusion provides a new reference index for reducing the slagging of biomass boilers or biomass coal-fired coupled power generation boilers.

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