Characteristic of cohesiveness-temperature of coal molten ash and its adaptability to entrained flow gasifier

ZHOU Zhijie; LI Dexia; LIU Xia; YU Guangsuo

doi:10.3969/j.issn.0438-1157.2012.10.034

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Characteristic of cohesiveness-temperature of coal molten ash and its adaptability to entrained flow gasifier

更新时间：2025-12-10

- Characteristic of cohesiveness-temperature of coal molten ash and its adaptability to entrained flow gasifier
- CIESC Journal Issue 10, Pages: 3243-3254(2012)
- 作者机构：
  
  华东理工大学煤气化及能源化工教育部重点实验室,上海,200237
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2012.10.034
  CLC： Q534
- Online First：05 October 2012，
  
  Published：05 October 2012
- 稿件说明：
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ZHOU Zhijie, LI Dexia, LIU Xia, et al. Characteristic of cohesiveness-temperature of coal molten ash and its adaptability to entrained flow gasifier[J]. CIESC Journal, 2012, (10): 3243-3254.
DOI：

ZHOU Zhijie, LI Dexia, LIU Xia, et al. Characteristic of cohesiveness-temperature of coal molten ash and its adaptability to entrained flow gasifier[J]. CIESC Journal, 2012, (10): 3243-3254. DOI： 10.3969/j.issn.0438-1157.2012.10.034.

摘要

以21个中国典型煤样为研究对象

根据煤灰中CaO和Fe2O3含量

将之分为低钙低铁类、中钙中铁类、中钙高铁类、高钙低铁类、高钙高铁类等类别。利用高温黏度计测量煤灰熔渣黏温特性

并利用计算软件FactSage对煤灰熔融状态进行热力学平衡计算

研究了液相熔渣及固体矿物质结晶与熔渣黏度的关系

分析整理了煤灰最初硅铝比(SiO2/Al2O3)、固体结晶物以及液相熔渣组成3个因素对煤灰熔融特性和熔渣黏温特性的影响

为根据煤灰组分分析来预测不同煤的熔渣黏温特性及对气流床气化的适应性提供了一个简单而实用的判断方法。对气流床气化液态排渣的适应性从高到低依次为:中钙高铁类、高钙低铁类、中钙中铁类、低钙低铁类和高钙高铁类。

Abstract

Based on CaO and Fe2O3 content in coal ash

21 typical Chinese coal samples are categorized into low-calcium-low-ferric

medium-calcium-medium-ferric

medium-calcium-high-ferric

high-calcium-low-ferric

and high-calcium-high-ferric.The characteristic of cohesiveness-temperature of coal molten ash was measured by a high-temperature rotary viscometer

Factsage.The thermodynamic equilibrium of their molten states was calculated and the relationship between liquid molten slag

solid mineral crystal and viscosity of the slag was studied.Influences of initial SiO2/Al2O3 mass ratio

solid crystals and composition of liquid-slag on the behavior of coal ash melting and characteristic of cohesiveness-temperature of the molten slag were analyzed and discussed in detail.A simple and practical method based on ash composition data of coal is provided to predict coal ash melting behavior and evaluate adaptability to entrained flow gasifier.The order of coal adapting to liquid-state slagging of entrained flow gasifier could be

from high to low

as follows:medium-calcium-high-ferric

high-calcium-low-ferric

medium-calcium-medium-ferric

low-calcium-low-ferric

and high-calcium-high-ferric.

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