焦炉煤气混空与矿井气混合燃烧运行分析——以江西丰城精品陶瓷园供气项目为例  

Operation analysis of co-combustion of mine drainage gas and coke oven gas mixed with air: Operation effect and safety analysis based on the gas supplication project of Fengcheng Fine Ceramics Industrial Park in Jiangxi province

作　　者：姜程山 田贯三[1,2,3] 刘付庆 

机构地区：[1]山东建筑大学热能工程学院,山东济南250101 [2]山东建筑大学可再生能源建筑利用技术省部共建教育部重点实验室,山东济南250101 [3]山东建筑大学山东省建筑节能重点实验室,山东济南250101 [4]山东万豪华宇工程设计有限公司,山东济南250101

出　　处：《山东建筑大学学报》2015年第4期356-362,共7页Journal of Shandong Jianzhu University

摘　　要：多气源混合供气对于工业用户燃气需求量大但天然气供应不稳定的问题可以起到有效的缓解作用,但其运行效果和安全性有待于进一步的分析和论证。文章以江西丰城精品陶瓷工业园燃气供应项目为例,阐明了混合燃气的热值、燃烧温度等参数特征,分析了混合燃气的组成、爆炸极限和混合燃气的均匀性等性质,揭示了燃气浓度、爆炸上限和含氧量之间的数量关系。结果表明:文中研究项目中,当焦炉煤气中混入的空气量不超过40%,与矿井气以任意比例混合时,混合燃气热值均超过10.465 MJ/m3,燃烧温度均超过1300℃,能够满足陶瓷生产厂家的要求;焦炉煤气与空气混合后含氧量最高为8.78%,燃气浓度超过相同二次混气比下燃气爆炸上限15%左右,可以保证混气均匀性以及混合燃气供给陶瓷窑炉燃烧的安全性。Multi-resouce gas supplication is an efficient way to ease the problem of deficiency of gas for industrial usage. However, the operation effect and safety issues of it must be analyzed and justified specifically. This paper takes the gas supplication project of Fengcheng Fine Ceramics Industrial Park in Jiangxi province as an example, from the aspects of the mixed gas＇ calorific value and combustion temperature, analyzes and demonstrates the operation effect. Meanwhile, it analyzes the composition, explosion limits and uniformity of the mixed gas and shows the numerical relationships among the concentration, upper explosion limit and oxygen content by graphs. The results show that when the mixing ratio of coke oven gas and air is up to 6：4 and then mixed with mine drainage gas in any ratio, the mixed gas＇ calorific value is over 10. 465 MJ/m3, the combustion temperature is over 1300 ℃, the highest oxygen content of coke oven gas mixed with air is 8.78% and the concentration of combustible gases is about 15% higher than the upper explosion limit under the same second-stage mixing ratio. Hence the conclusion is drawn that it＇ s efficient and safe to supply ceramic kilns with the mixed gas while it won＇ t cause any deflagration or explosion. At the same time, the impact of unstable mine drainage gas supplication could be decreased. In addition, the analytic methodology and conclusion may be an implication or a reference to the similar projects in the future.

关 键 词：混气比 爆炸极限 燃烧温度 安全性 

分 类 号：TU996[建筑科学—供热、供燃气、通风及空调工程]