煤粉低尘燃烧器实验研究
文献类型：学位论文
| 作者 | 蒋利桥 |
| 学位类别 | 硕士 |
| 答辩日期 | 2001 |
| 授予单位 | 中国科学院广州能源研究所 |
| 授予地点 | 中国科学院广州能源研究所 |
| 导师 | 陈恩鉴 |
| 关键词 | 低尘 旋流 液排渣 旋风燃烧 |
| 学位专业 | 热能工程 |
| 中文摘要 | In this paper, we have contrived a new type of lower-ash coal pulverized combustor, and obtained several important conclusions by studying the cold-condition model and hot-condition experiment. The velocity field and the pressure field are more symmetrical than the average combustor. The annular back-flow exists in the axial velocity distribution in all experimental conditions, it is so deep that it nearly puts through whole the combustor. The "two peak-value" phenomena exists in the tangential velocity distribution. The magnitude of radial velocity is the same scale as the axial velocity's. The magnitude of D_(out)/D is the key factor to influence the cold velocity field, the less it is, the more annular back-flow ratio increases. Inlet diameter influences the velocity field in the headspace, both annular back-flow and central back-flow rate increase while the magnitude of D_(in)/D is less. Adding the length can lead central back-flow to move back, annular and central back-flow rate to increase respectively. With the same swirl direction, primary air's entrance can enlarge the central back-flow, the best condition is flux ratio Q_1/Q_2=5%, but if the way of primary air's entrance is straight injection, the central back-flow will disappear, it is harmful for pulverized coal to be combusted. In a word, the preferred condition construction is D_(out)=200mm, L=600mm, D_(int)=200mm, Q_1/1_2=5%. In the hot-condition experiment, the combustor can run normally, when the ash fusion is not too high (about 1400℃), the slag can flow out easily, and the temperature can reach 1600-1800℃ in the combustor. The combustion efficiency is 99.97% and slag-capture rate is about 90%. |
| 语种 | 中文 |
| 公开日期 | 2011-07-06 ; 2011-07-08 |
| 页码 | 64 |
| 源URL | [http://ir.giec.ac.cn/handle/344007/3847]  |
| 专题 | 中国科学院广州能源研究所 |
| 推荐引用方式 GB/T 7714 | 蒋利桥. 煤粉低尘燃烧器实验研究[D]. 中国科学院广州能源研究所. 中国科学院广州能源研究所. 2001. |
入库方式： OAI收割
来源：广州能源研究所
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