燃料与化工 ›› 2019, Vol. 50 ›› Issue (6): 3-7.

• 综述与专论 • 上一篇    下一篇

高硫炼焦煤中硫元素在热解过程中的迁移规律研究

商铁成  高宇   

  1. 煤炭科学技术研究院有限公司, 北京100013
  • 出版日期:2019-11-11 发布日期:2020-01-03

Study on the sulfur migration law in high-sulfur coking coal during pyrolysis

Shang Tiecheng  Gao Yu   

  1. Coal Science and Technology Research Institute Co.,Ltd.,Beijing 100013,China
  • Online:2019-11-11 Published:2020-01-03

摘要:

为探索炼焦煤中硫元素在洗选和热解过程中的迁移规律,选择3种典型炼焦煤,首先研究洗选过程中硫元素的迁移规律,然后在得到洗精煤的基础上,利用1 kg热解试验装置,研究热解过程中炼焦精煤的全硫、黄铁矿硫、硫酸盐硫和有机硫的迁移规律。结果表明,煤炭洗选过程中主要脱除原煤中的黄铁矿硫,在热解过程中,700 ℃以前,黄铁矿硫脱除较为明显,700 ℃以后,有机硫脱除更加突出。此外,在高温区域还存在黄铁矿硫、脂肪类硫化物等向噻吩类硫转化的现象。

关键词: 炼焦煤, 有机硫, 黄铁矿硫, 迁移规律

Abstract:

There are three typical coking coal elected in order to research transformation characteristics of the sulfur in coking coal in the process of washing and pyrolysis.At first stage,the migration law of sulfur in washing process is studied.At second stage,the migration of total sulfur,pyrite sulfur,sulfate sulfur and organic sulfur in clean coal in pyrolysis process was studied by the experiment of 1 kg test oven.As a result,pyrite sulfur in raw coal is mainly removed during coal washing.In the process of pyrolysis,pyrite sulfur removal is essential to the reaction when temperature is below 700 ℃,but organic sulfur removal plays key role when temperature is above 700 ℃.In addition,there occurs a chemical phenomenon that pyrite sulfur and fatty sulfide are converted to thiophene sulfur in the high temperature region.

Key words: Coking coal, Organic sulfur, Pyrite sulfur, Law of migration

中图分类号: