摘要
分别以水蒸汽和CO_2为气化剂,采用自制的煤炭地下气化模拟试验装置模拟煤炭地下气化,研究粒度为5~10 mm的大颗粒褐煤、烟煤和无烟煤在不同气化温度下气化的煤气洗涤水中污染物变化。结果表明,随着气化温度的升高,煤气洗涤水中挥发酚、TOC、COD、氨氮和大多数微量元素的浓度不断增大,适当控制气化温度可以有效降低煤炭地下气化对地下水的污染程度;水蒸汽为气化剂时煤气洗涤水中挥发酚、TOC、COD、氨氮和微量元素均明显高于CO_2气化;煤种对煤气洗涤水中污染物组分影响显著,挥发酚、COD和微量元素的含量均为褐煤〉烟煤〉无烟煤。
With CO_2 and steam as gasification agents separately,a self-made underground coal gasification simulation test device is used to simulate the undergroud coal gasification. The changes of pollutants in the coal gas washing water from gasification of Neimeng lignite,Hebi bituminous coal and Jincheng anthracite with particle size of 5-10 mm under different gasification temperatures are studied. The results show that the concentrations of TOC,COD,volatile phenols,ammonia and most of trace elements are increased in the coal gas washing water with the increase of gasification temperatures. Proper control of gasification temperature can effectively reduce the pollutions of groundwater.Compared with CO_2 gasification agent,the concentration of volatile phenol,TOC,COD,ammonia and trace elements in coal gas washing water with steam as gasificaiton agent are obviously higher. The types of coal play a significante role in the pollution compoents. For volatile phenol,COD and trace elements,the significance order of coal types are all shown as： lignite bituminous coal anthracite.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第5期146-150,共5页
Modern Chemical Industry
基金
国家自然科学基金项目(51174077
51404098)
教育部博士点基金项目(20124116110002)
关键词
煤炭气化
气化温度
CO_2
挥发酚
污染物
coal gasification
gasification temperature
CO_2
volatile phenols
pollutants
