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由于引起气化炉压差波动的因素较多,任何因素变化或波动都会导致气化炉压差也同步波动,成为制约壳牌hybrid气化炉连续、稳定、长周期运行的重要因素。从如何判断气化炉压差波动、波动原因以及对气化炉的影响进行分析总结,通过优化调整,减少气化炉压差波动频率和幅度,延长气化炉关键设备(爆破片)的使用周期。 相似文献
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详细介绍了煤气化工艺技术的种类,各种气化炉的特点以及每种气化炉适用的煤种,并对各种气化炉在国内应用现状进行了详细的阐述. 相似文献
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简述Shell气化炉工艺流程,介绍气化炉温度控制的重要性以及气化炉温度控制的关键操作对象氧煤比。目前气化炉内的反应温度无法直接测量,通过分析气化炉温度的各间接关联参数,对比利用关联参数进行炉温控制的可行性及优缺点。探讨通过汽包小室蒸汽产量来代替目前CO2进行气化炉温度控制的可行性与优越性。 相似文献
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壳牌气化技术主要运用的是干粉煤加压气化以及液态排渣形式,属于目前煤炭资源洁净使用的一种先进技术。但是在使用过程存在很多影响因素,这些因素严重影响了壳牌气化炉内流场的稳定性,为进一步探究影响因素,本文着重对壳牌气化炉内流场特征展开了研究,并且提出了影响壳牌气化炉内流场稳定性的主要因素以及危害后果,希望给壳牌气化炉的稳定运行带来积极的作用。 相似文献
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Based on the experience of the gasifier users on the efforts and energy for wood chip preparation in a typical gasifier, we have embarked on the development of a gasifier suitable to work with long stick woody biomass as the feed materials. In the context of the impact of gasifiers, as decentralized energy delivery devices such an approach, it is hoped, would be an attractive option in rural areas both in domestic and industrial sectors. In the present paper in the gasifier operation, there is a fixed quantity of char that is combusted to gasify a fixed amount of wood, and the gasifier does not operate in a steady state manner. In this present work, focus is made on the development of a gasifier using long sticks of wood as feed materials. With this concept, a 10 kW thermal output power gasifier is designed and constructed. The gas and airflows can be converted to the air/fuel ratio, the most important aspect of gasifier operation. The air/fuel ratio shows operation in a combustion mode at start up, a gasification mode for the middle part of the run and a charcoal gasification mode at the end of the run. Since the interest here is exploring and validating of this concept, a bottom lit updraft gasifier is designed mainly to look at the gas yield and other favourable factors and to use this gas so obtained for thermal applications. The rate of feed was between 9 and 10 kg/h and continuous operation for 5 h was made in a couple of runs to study the performance. In this paper we report the salient features of our efforts and results, yielding a gasifier efficiency of 73%. 相似文献
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碎煤加压固定床气化技术进展 总被引:2,自引:0,他引:2
介绍了碎煤加压固定床气化技术的发展历程、工艺特点,以及典型的Mark-Ⅳ型Lurgi气化技术的工业应用;对现代煤化工可选用的主流气化技术进行了简要分析,指出了碎煤加压固定床气化技术在褐煤气化方面具有的比较优势。最后对BRICC内径100mm小型固定床加压气化试验装置进行了介绍,该试验装置在煤样试烧评价、取得煤样气化特性数据以指导煤化工项目设计中具有重要作用。 相似文献
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根据国内鲁奇炉的使用情况,总结了山西天脊煤化工集团公司10年的运行经验和技术改造成果,提出了鲁奇炉在我国的发展方向。 相似文献
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British Coal Corporation has been developing an air-blown spouted fluidised bed gasification process for the production of low calorific value fuel gas. Development of the gasifier at atmospheric pressure for the industrial market has established the commercial basis for a flexible gasification process, which can achieve coal conversion efficiencies of up to 95%. For larger-scale use, a pressurised gasifier is under development as part of an integrated partial gasification combined cycle, coal-fired, electricity generating system. Known as the British Coal Topping Cycle, the system offers significant advantages in terms of improved thermal efficiency, reduced generating costs and low environmental impact. The paper outlines the gasifier development programme for both applications. 相似文献
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煤炭分级利用是煤炭高效低碳利用的主要途径之一,提出一种同时制备热解气和合成气的分级气流床气化炉,炉体上部为煤热解室,下部为煤焦气化室。采用PV6M颗粒测速仪对气化炉内固体颗粒的速度和浓度分布进行测量,并运用CFD软件对气化炉内气固两相流场进行模拟。结果表明,在射流发展区域与射流碰撞后的折射流发展区域,颗粒速度较高;边壁区域颗粒速度较低且出现回流现象。在惯性和气流曳力作用下,热解室内大部分颗粒自流进入气化室。热解室上部径向颗粒浓度中心高边壁低;气化室下部径向颗粒浓度中心低边壁高。热解室与气化室进气量比、喷嘴角度及颗粒直径等对气化炉出口颗粒流出量分配有重要的影响。热解室进气量增大,颗粒从热解室出口流出占比先减小后增大;热解喷嘴偏转角与颗粒Stokes数增大,颗粒从热解室出口流出占比减小。 相似文献
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煤炭分级利用是煤炭高效低碳利用的主要途径之一,提出一种同时制备热解气和合成气的分级气流床气化炉,炉体上部为煤热解室,下部为煤焦气化室。采用PV6M颗粒测速仪对气化炉内固体颗粒的速度和浓度分布进行测量,并运用CFD软件对气化炉内气固两相流场进行模拟。结果表明,在射流发展区域与射流碰撞后的折射流发展区域,颗粒速度较高;边壁区域颗粒速度较低且出现回流现象。在惯性和气流曳力作用下,热解室内大部分颗粒自流进入气化室。热解室上部径向颗粒浓度中心高边壁低;气化室下部径向颗粒浓度中心低边壁高。热解室与气化室进气量比、喷嘴角度及颗粒直径等对气化炉出口颗粒流出量分配有重要的影响。热解室进气量增大,颗粒从热解室出口流出占比先减小后增大;热解喷嘴偏转角与颗粒Stokes数增大,颗粒从热解室出口流出占比减小。 相似文献