摘要
为降低煤直接液化装置沉积、结焦对生产过程的影响,通过分析装置沉积、结焦的部位及规律,提出了减缓或消除沉积、结焦的方法,并验证预防沉积、结焦的效果。结果表明,适当提高介质流速,消除局部死区,降低物料附着量,适当降低局部温度,提高过滤精度等可减缓或消除沉积、结焦。改造后热中压分离器结焦量从1. 86 t降至0. 27 t;冷高压分离器内的煤粉沉积量由0. 56 t降至0. 05t;减压塔进料加热炉连续运行时间从原来的不足2个月延长至6个月以上;反应器运行时间从200 d提高至420 d,有效缓解或消除了煤直接液化装置的沉积、结焦问题。
In order to reduce the influence of deposition and coking of coal direct liquefaction equipment on production process,efficient methods on mitigating or eliminating the deposition and coking during coal direct liquefaction was proposed by analyzing the deposition and coking sites and the regularity of the device.The results show that proper increase the flow rate of the medium,eliminating the local dead zone,reducing the amount of material adhesion can significantly mitigate or eliminate deposition and coking.Additionally,measures,such as reducing local temperature and improving filtration accuracy,are used to slow down or eliminate deposition or coking.Meanwhile,the effect of modification and optimization of relevant measures on prevention of deposition and coking has been verified.The coking amount of the hot medium pressure separator is reduced from 1.86 t to 0.27 t through the implementation of the above measures.The pulverized coal deposition in the cold and high pressure separator is reduced from 0.56 t to 0.05 t,and the vacuum furnace feed continuous operation.The time is extended from the original less than 2 months to more than 6 months,and the reactor operating time is increased from 200 days to 420 days.Therefore,the problem of deposition and coking of coal direct liquefaction equipment are effectively mitigated or eliminated.
作者
王建立
王喜武
WANG Jianli;WANG Xiwu(Ordos Coal Liquefaction Company,China Shenhua Coal to Liquid and Chemical Co.,Ltd.,Ordos 017209,China)
出处
《洁净煤技术》
CAS
2018年第6期122-127,共6页
Clean Coal Technology
基金
国家能源投资集团有限责任公司科技创新基金资助项目(SHJT-10-25)
关键词
煤直接液化
沉积
结焦
过滤精度
煤粉沉积量
coal direct liquefaction
deposition
coking
filtration accuracy
pulverized coal deposition
