摘要
多喷嘴对置式水煤浆气化炉是由兖矿集团和华东理工大学共同开发的具有自主知识产权水煤浆气化技术。该技术在消化、吸收德士古水煤浆气化技术的基础上应用了撞击流原理。兖矿国泰化工有限公司日处理1000t煤的多喷嘴对置式气化炉装置于2005年已成功进行了工业化示范运行,截至目前已经运行了近8年。对装置初期运行出现的拱顶超温故障进行了分析。造成拱顶砖超过正常烧蚀速率的主要原因是:气化炉的长径比选择偏小,上升气流因速度过快撞击到顶部耐火砖,造成冲刷;烧嘴速度偏高,撞击流上升流股火焰未能完全结束,对拱顶砖造成烧损。采取了严格控制喷嘴出口速度、改变了拱顶耐火砖/预制块的设计和调整工艺烧嘴结构等措施进行优化后,拱顶耐火砖的使用寿命大大提高,平均使用寿命已超过10000h,平均烧嘴使用寿命超过100d,满足了长周期运转的要求。
The opposed multi-nozzle coal-water slurry gasifier is proprietary coal-water slurry gasification technology jointly developed by Yankuang Group and East China University of Science andTechnology.Drawing on Texaco＇s coal-water slurry gasification expertise,this technology adopts the working principle of impinging streams.Yankuang Cathay Coal Chemicals Co.,Ltd.＇s 1000t/d opposed multi-nozzle gasifier went into operation under an industrial demonstration program in 2005 and has been in operation for nearly eight years.This arti- cle analyzes the malfunction of excessively high dome temperature taking place in the initial stage of operation of the unit.The main reasons for the ablation of the dome bricks at abnormal rates have been：a.As the length-diameter ratio selected for the gasifier was too small, the ascending air current would hit the refractory bricks at the top at a fairly fast speed,resuh in a washout;and b.As the burner speed was too high,the flame of the ascending streams of the impinging steams could not end completely ,leading to overburning of the dome bricks.Technicians took measures to optimize the performance of the gasifier including strictly controlling the nozzles＇ outlet velocity,changing the design of the dome bricks/precast blocks and adjusting the structure of the process burners.As a consequence,the life of the dome refractory bricks extended significantly-the average life has exceeded 10000 hours--and the average life of burners has exceeded 100 days.
出处
《中外能源》
CAS
2013年第7期97-101,共5页
Sino-Global Energy
关键词
多喷嘴
水煤浆
气化炉
耐火砖
拱顶超温
multi-nozzle
coal-water slurry
gasifier
refractory brick
excessively high temperature of the gasifier dome
