煤-天然气/焦炉气联合气化制备化工合成气
文献类型：学位论文
| 作者 | 段东平 |
| 学位类别 | 博士 |
| 答辩日期 | 2004 |
| 授予单位 | 中国科学院过程工程研究所 |
| 授予地点 | 中国科学院过程工程研究所 |
| 导师 | 郭占成 |
| 关键词 | 天然气 合成气 高炉 |
| 其他题名 | Manufacturing syngas by co-gasification of coal-NG/COG |
| 学位专业 | 化学工艺 |
| 中文摘要 | 目前，国内外普遍采用的均为单一原料的造气工艺，这些工艺技术成熟、已经广泛应用于化工合成气制备。但面对我国实际情况，单独以天然气或以煤为主要原料的造气工艺都存在流程、设备、投资、成本等方面的具体困难，也必须在下游产品合成前对姚／CO进行调整。因此，急需研究开发具有我国自主知识产权、能够与我国液态燃料合成技术相配套、符合我国资源特点、经济和环保效益良好的通用型合成气制备技术。根据前期的小型实验和模拟计算，课题组提出并申请了采用煤与天然气／焦炉气在高炉中联合气化制备化工合成气的创新项目和“863”项目，以此来尝试生产H2／CO可调范围1-2的合成气。本研究即针对以上思路和工艺路线，分析和借鉴煤一氧制备直接还原气、全氧高炉、COREX、高炉喷吹燃料、煤气发生炉等造气工艺和设备在原料准备、操作条件、合成气成分等几方面具有共性的经验和数据，总结提出研究重点和关键问题，并在实验室通过大量的试验探索，为进一步中试研究提供参考。在实验室建成产气量10-20m3／h的热态气化炉实验系统，对比研究制备合成气过程中多种因素对火焰区温度场、合成气成分的影响，如氧气与天然气入炉枪位，气化炉外加热温度，CH4／O2和H2O／O2的供气配比、流量、预热方式，床层高度和煤种等，从而为我们控制高温火焰区温度、选择煤种、确定操作参数等难题的解决提供思路，并为中试方案的流程、炉型、喷枪结构等设计工作提供依据。试验结果主要说明了（1）天然气与氧气避免直接燃烧，在入口处要分开一段距离以便天然气先期裂解和气化。而且，试验证实天然气的入口位置环境温度要保证在900℃以上。（2）有必要对天然气或氧气与水同时预热送入炉内，但二者的预热方式对火焰区温度和合成气成分影响不同，而且H2O／O2的值对在0.25较适宜。（3）气化炉外加热温度越高就越有利于气化反应。（4）采用阳城无烟煤比焦碳更有利于联合气化，其温度调节范围大，合成气成分更优化，容易达到H2／CO＝1-2、H2+CO＝95％的实验指标。（5）同种炉料的床层高度1500mm优于1200mm，床层高则其温度变化趋于平缓、设备易于维护，合成气的裂解与气化反应时间相对延长、成分更优化。本研究对中试高炉的工艺设计和操作参数有一定的参考价值，并对采用高炉系统进行联合气化具有启示作用。 |
| 英文摘要 | Sole material for gasification process which already used widely in chemical industry as a dependable technology were adopted in China and abroad. Some difficulties in the process hereinbefore such as flow, facility, investment and cost will be impacted with China situation. Therefore, a generally used technology accord with china resources for synthetic gasification with our own knowledge property right, matched liquid fuel synthetic technology of our country, good economical and environment benefits should be researched and developed rapidly. An innovation project and "863" project have been accepted and applied for manufacturing syngas by co-gasification of coal and natural gas/COG based on prophase data in simulating calculation and minitype experiments. It will be tried to manufacture syngas with ratio of H2/CO between 1~2. According to above research idea and practicable flow, oxygen BE, COREX, gas generator and etc. were analyzed and summarized. A experiment system of high temperature with 10~20m3/h out gas was set up in laboratory. Some influence factors of syngas manufacturing were studied such as combustion zone temperature, composition of syngas, injecting position of oxygen and natural gas, heating temperature, injecting flux and feed height of coke or coal, etc. The solutions of how to control combustion zone tempeture, which kind of coal to choose, what operation parameters would be picked up and etc. were advanced. The basis of plan for trial process and some equipments designing was provided. As a result, (1) In order to avoid oxygen would be burned with natural gas directly, a period of natural gas cracking and gasification would be needed at injecting position of oxygen and natural gas. The temperature of injecting position should up to 900'C. (2)Need to pre-heat both natural gas with steam and oxygen with steam, and keep 0.25 as a benifiting ratio of H2O/O2. (3)A higher temperature would benefit to high efficiency gasification. (4)A YANGCHENG anthracite was good at gasification but coke. The goal of the project, H2/CO=1~2 and H2+CO=95% was easy to obtain. (5)The height of stock 1500mm was advantaged to control combustion zone temperature and optimize composition of syngas but height 1200mm. Higher height of stock would helped to device maintenancing, natural gas cracking and syngas optimizing. There would be some reference to trial blast furnace and coa -natural gas gasification with blast furnace system. |
| 语种 | 中文 |
| 公开日期 | 2013-09-16 |
| 页码 | 91 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/1389]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 | 段东平. 煤-天然气/焦炉气联合气化制备化工合成气[D]. 中国科学院过程工程研究所. 中国科学院过程工程研究所. 2004. |
入库方式： OAI收割
来源：过程工程研究所
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