共查询到19条相似文献,搜索用时 93 毫秒
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德士古气化炉投料失败原因分析 总被引:1,自引:0,他引:1
德士古气化炉投料成功与否,受诸多因素影响,如气化炉膛温度,煤浆浓度,氧煤比及煤浆、氧气阀门动作顺序正确与否等,其中气化炉的蓄热量(即气化炉炉膛温度)是一个关键因素。在气化炉投料过程中,出现了各种各样影响气化炉投料失败的原因,通过比较有针对意义的德士古气化炉开车投料过程进行了分析、总结。 相似文献
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在气化装置安全保护控制系统中,阶段1程序和阶段2程序贯穿于气化炉投料的始终。针对投料程序联锁条件多、逻辑关系复杂、程序长、动作时间短、跳车后故障原因难以分析等特点,编写了气化炉投料程序动态信息表,利用PLC软件功能,通过参考数据子程序将其在具有编程器功能的PC机上显示,可以跟踪和监视投料程序动作的全过程,一旦投料受阻能立即判明原因,指导排除故障,为投料成功提供了有力的保证。 相似文献
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Obtaining the temperature inside the gasifier of a Shell coal gasification process (SCGP) in real-time is very important for safe process operation. However, this temperature cannot be measured directly due to the harsh operating condition. Estimating this temperature using the extended Kalman filter (EKF) based on a simplified mechanistic model is proposed in this paper. The gasifier is partitioned into three zones. The quench pipe and the transfer duct are seen as two additional zones. A simplified mechanistic model is developed in each zone and formulated as a state-space representation. The temperature in each zone is estimated by the EKF in real-time. The proposed method is applied to an industrial SCGP and the effectiveness of the estimated temperatures is verified by a process variable both qualitatively and quantitatively. The prediction capability of the simplified mechanistic model is validated. The effectiveness of the proposed method is further verified by comparing it to a Kalman filter-based single-zone temperature estimation method. 相似文献
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Heat transfer between a bed of nickel pellets and a vertical section of electrically heated steel pipe has been measured, with the pellet bed inside the vertical pipe. Most of the data are for a 20.27 cm diameter pipe but some data were also obtained for a 10.23 cm diameter pipe. The effective thermal conductivity of the stationary pellet bed has been estimated approximately from the results of unsteady heating tests. Tests have been carried out with a downwardly moving bed, including the effect of air flowing upwards through the bed. Average values of the pellet‐side heat transfer coefficient are between 72 and 135 W/(m2°C) depending on the mass fluxes of air and pellets, and have been expressed as an empirical correlation. 相似文献
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从化学反应和传热两个方面考虑,建立了生物质间接供热气化模型,包括化学反应和传热两个子模型。化学反应子模型可以预测产气主要成分以及气化反应需要的热量,而传热子模型则可以估算热管的总热阻和传热功率。在模型分析基础上,开发设计了热管式生物质气化炉,并对化学反应子模型进行了验证。结果表明生物质间接供热气化模型成功地预测了产气主要成分,在利用热管间接供热的生物质气化产气中氢气含量在50%~60%之间,并且气体热值较高,可达10 MJ·m-3 相似文献
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本文所提出的联合传热模型的管道倾斜范围为-90°到+90°。联合传热模型所需的参数由Zhang等人提出的气液混输管道联合水动力学模型计算得到。用本模型计算管道内的对流换热系数与实验得到的对流换热系数相一致。 相似文献
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德士古气化炉渣堵机理探讨 总被引:1,自引:0,他引:1
介绍了造成德士古冰煤浆加压气化炉渣堵的几个影响因素,并分析了产生原因,从选用优质耐火砖,稳定气化炉运行,严格控制炉温,使用破渣机等几个方面提出了预防气化炉渣堵的有效措施。 相似文献