水洗对准东煤煤质特性影响的实验研究

付子文; 王长安; 翁青松; 车得福

doi:10.7652/xjtuxb201403011

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水洗对准东煤煤质特性影响的实验研究

更新时间：2025-04-29

- 水洗对准东煤煤质特性影响的实验研究
- Experimental Investigation for Effect of Water Washing on Zhundong Coal Properties
- 西安交通大学学报 2014年48卷第3期页码：54-60
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201403011
  中图分类号： TK16
- 网络首发：2014-03-10，
  
  纸质出版：2014
- 稿件说明：
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付子文, 王长安, 翁青松, 等. 水洗对准东煤煤质特性影响的实验研究[J]. 西安交通大学学报, 2014,48(3):54-60.

Experimental Investigation for Effect of Water Washing on Zhundong Coal Properties[J]. 2014, 48(3): 54-60.
付子文, 王长安, 翁青松, 等. 水洗对准东煤煤质特性影响的实验研究[J]. 西安交通大学学报, 2014,48(3):54-60. DOI： 10.7652/xjtuxb201403011.

Experimental Investigation for Effect of Water Washing on Zhundong Coal Properties[J]. 2014, 48(3): 54-60. DOI： 10.7652/xjtuxb201403011.

摘要

针对准东煤由于灰中Na含量过高

燃用中会出现严重的积灰问题

在对准东煤中碱金属赋存形态进行研究的基础上

着重研究了水洗温度和时间对准东煤Na脱除量及热解燃烧特性的影响。研究表明

3种典型的准东煤中Na主要以水溶形式存在

水洗可以有效脱除Na

且脱除量与水洗温度和时间密切相关。水洗后煤热解特性指数减小

20、40 ℃水洗使热解提前

焦炭产量增加

挥发分产量减少

而60 ℃水洗则相反。水洗使燃烧TG、DTG(热质量损失、热质量损失率)曲线向高温区偏移

燃尽温度和最大燃烧温度升高

最大燃烧速率减小

燃尽时间延长

燃烧特性变差。动力学分析表明

水洗使煤热解第一、三阶段表观活化能减小

第二阶段表观活化能增大

使燃烧表观活化能、指前因子和燃烧反应速率常数减小。Na对煤样热解燃烧存在催化作用

且存在最佳Na含量使催化作用最强。

Abstract

The effects of water washing temperature and time on coal properties are investigated according to the occurrence mode of alkali metals in Zhundong coal. The experimental results show that Na mainly exists in water soluble form in three typical types of Zhundong coal. Harmful element Na can be effectively removed by water washing

and the removal amount is closely related to washing temperature and time

and the pyrolysis characteristic index number of washed coals reduces. When the temperature gets below 40 ℃

the pyrolysis process of washed coals can be brought forward with more volatile yielded

and coals washed in 60 ℃water vary oppositely. The combustion TG and DTG curves of water washed coals move towards higher temperature zone

while the burnout temperature and the maximum temperature increase

the maximum combustion rate decreases

the burnout time is prolonged

and the combustion performance is deteriorated. The kinetic analysis indicates that water washing facilitates decreasing the pyrolysis apparent activation energy during the first and third stages and increasing it during the second stage. The presence of Na exerts catalytic effect on coal pyrolysis and combustion behaviors. Moreover

there exists an optimal Na content for the strongest catalytic effect.

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references

杨忠灿, 刘家利, 姚伟. 准东煤灰沾污指标研究[J]. 洁净煤技术, 2013(2): 81-84.

YANG Zhongcan, LIU Jiali, YAO Wei. Fouling index of Zhundong coal ash[J]. Coal Cleaning Technology, 2013(2): 81-84.

杨忠灿, 刘家利, 何红光. 新疆准东煤特性研究及其锅炉选型[J]. 热力发电, 2010, 39(8): 38-44.

YANG Zhongcan, LIU Jiali, HE Hongguang. Study on properties of Zhundong coal in Xinjiang region and type selection for boilers burning his coal sort[J]. Thermal Power Generation, 2010, 39(8): 38-44.

BLASING M, MULLER M. Release of alkali metal, sulphur, and chlorine species from high temperature gasification of high-and low-rank coals[J]. Fuel Process Technology, 2013(106): 289-294.

ESCOBAR I, OLESCHKO H, WOLF K J, et al. Alkali removal from hot flue gas by solid sorbents in pressurized pulverized coal combustion[J]. Powder Technology, 2008, 180(1): 51-56.

EJYK P J, KOSMINSKI A, ASHMAN P J. Control of agglomeration and defluidization during fluidized-bed combustion of south Australian low-rank coals[J]. Energy Fuels, 2012, 26(1): 118-129.

徐婧. 生物质燃烧过程中碱金属析出的实验研究[D]: 杭州, 浙江大学, 2006.

NASIR S, KUCERIK J, MAHMOOD Z. A study on the washability of the Azad Kashmir(Pakistan)coalfield[J]. Fuel Process Technology, 2012(99): 75-81.

CUVILAS C A, YANG W H. Spruce pretreatment for thermal application: water, alkaline, and diluted acid hydrolysis[J]. Energy Fuels, 2012, 26(10): 6426-6431.

SAKANISHI A, AKASHI E, NAKAZATO T, et al. Characterization of eluted metal components from coal during pretreatment and solvent extraction[J]. Fuel, 2004, 83(6): 739-743.

邓磊, 张涛, 刘银河, 等. 水洗对生物质燃料特性及燃烧特性的影响[J]. 工程热物理学报, 2010, 31(7): 1239-1242.

DENG Lei, ZHANG Tao, LIU Yinhe, et al. Effect of washing on fuel properties and combustion characteristics of biomass[J]. Journal of Engineering Thermophysics, 2010, 31(7): 1239-1242.

汉春利, 张军, 刘坤磊. 煤中钠存在形式的研究[J]. 燃料化学学报, 1999, 27(6): 575-578.

HAN Chunli, ZHANG Jun, LIU Kunlei. Modes of occurrence of sodium in coals[J]. Journal of Fuel Chemistry and Technology, 1999, 27(6): 575-578.

孟凡华, 杨天华, 孙洋, 等. 生物质燃烧过程中碱金属迁移转化研究进展[J]. 可再生能源, 2010, 28(5): 111-114.

MENG Fanhua, YANG Tianhua, SUN Yang, et al. Research process migration and transformation of alkali metals during biomass combustion[J]. Renewable Energy Resource, 2010, 28(5): 111-114.

李勇, 肖军, 章名耀. 燃煤过程中碱金属迁移规律的模拟研究与预测分析[J]. 燃料化学学报, 2005, 33(5): 556-560.

LI Yong, XIAO Jun, ZHANG Mingyao. Modeling and prediction of migration mechanism of alkali metals during coal-fired process[J]. Journal of Fuel Chemistry and Technology, 2005, 33(5): 556-560.

王贤华, 陈汉平, 王静, 等. 无机矿物质盐对生物质热解特性的影响[J]. 燃料化学学报, 2008, 36(6): 679-683.

WANG Xianhua, CHEN Hanping, WANG Jing, et al. Influences of mineral matters on biomass pyrolysis characteristics[J]. Journal of Fuel Chemistry and Technology, 2008, 36(6): 679-683.

熊杰, 周志杰, 许慎启, 等. 碱金属对煤热解和气化反应速率的影响[J]. 化工学报, 2011, 62(1): 192-198.

XIONG Jie, ZHOU Zhijie, XU Shenqi, et al. Effect of alkali metal on rate of coal pyrolysis and gasification[J]. CIESC Journal, 2011, 62(1): 192-198.

LIU Q R, HU H Q, ZHOU Q, et al. Effect of inorganic matter on reactivity and kinetics of coal pyrolysis[J]. Fuel, 2004, 83(6): 713-718.

JENKINS B, MANNAPPERUMA J, BAKKER R. Biomass leachate treatment by reverse osmosis[J]. Fuel Processing Technology, 2003, 81(3): 223-246.

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