摘要
煤气化是煤、O_2、水或蒸汽在加压条件下进行复杂化学反应,生成以CO和H_2为主的合成气。合成气中,CO和H_2含量是通过控制O_2和煤的进料量比例来实现的。氧煤比控制方案是煤气化装置安全、稳定运行控制方案的核心,氧煤比控制的精确性对碳的转化率、合成气组分、气化炉温度等关键工艺指标有着直接的影响。不同的工艺路线、气化炉炉型、进料方式有不同的氧煤比控制策略。通过对国内部分煤化工装置氧煤比控制方案的研究,阐述了不同装置的控制方案,并对比了优缺点。结果表明,氧煤比控制策略有着不同的适用性,需根据不同的工艺条件进行优化。该分析能为煤气化装置工程技术人员的实际应用提供借鉴。
Coal gasification is a complex chemical reaction of coal,oxygen,water,or steam under pressure conditions,which generates the syngas based on carbon monoxide and hydrogen. The content of carbon monoxide and hydrogen in the syngas is achieved by controlling the proportion of the feed of oxygen and coal. Therefore,oxygen/coal ratio control scheme is the core of long-term safe and stable operation control for coal gasification plant;the accuracy of oxygen/coal ratio control has a direct impact on key process indicators such as carbon conversion,syngas composition and gasifier temperature. Different process routes,different types of gasifier furnace,and different modes of feed have different oxygen/coal ratio control strategy. Through researching on the oxygen/coal ratio control schemes of some domestic mainstream coal gasification plants,the control scheme are introduced and the advantages and disadvantages of different control schemes are expounded and compared. Results show that different oxygen/coal ratio control strategies have different applicability,and need to be optimized according to different process conditions.The analysis can provide reference for the practical application of coal gasification plant engineering technicians.
作者
董清锋
陈菲
DONG Qingfeng;CHEN Fei(Hydrocardon High-Efficiency Utilization Technology Research Center, Shaanxi Yanchang Petroleum （Group） Co., Ltd., Xi＇ an 710075, China)
出处
《自动化仪表》
CAS
2018年第6期78-80,共3页
Process Automation Instrumentation
关键词
氧煤比
控制策略
气力输送
串级
耦合
限幅器
选择器
Oxygen/Coal ratio
Control strategy
Pneumatic conveying
Cascade
Coupling
Limiter
Selector
