共查询到19条相似文献,搜索用时 140 毫秒
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前馈控制策略在德士古水煤浆气化炉进氧流量压力控制中的应用 总被引:1,自引:0,他引:1
谷修文 《化工自动化及仪表》2009,36(2):97-99
介绍了一种使用前馈控制策略提高多台并列运行德士古水煤浆气化炉入口氧气总管流量压力控制稳定性的方法,该方法将水煤浆气化炉事故停炉过程中的支管氧气流量变化量、氧气总管放空阀的流量特性和开关速度及支管氧气切断阀关断时间综合起来生成前馈控制信号,将此前馈控制信号加到氧气总管放空回路中,及时放掉事故停炉过程中多余的氧气,以达到稳定剩余运行气化炉支管入口氧气流量压力的目的。实际使用证明,此方法控制效果良好,提高了德士古气化炉的运行安全性。 相似文献
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烟机是催化裂化装置的重要设备,一般与主风机串联构成三机组运行模式。烟机切断蝶阀是保障烟机运行的关键联锁阀门,该阀若出现故障,直接影响主风机组运行,极易造成装置再生器瞬间超压,主风机组喘振,装置切断进料,后果十分严重。本文主要对茂名某催化裂化装置烟机入口切断阀控制机构在使用过程中经常出现的控制不稳定、锁位不可靠、电机频繁启停等突发故障的现象、原因进行了详细分析,并对烟机切断蝶阀的控制机构提出了一系列的改造意见,保障了切断阀的运行安全可靠。 相似文献
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朱海祥 《中国石油和化工标准与质量》2012,32(4):28
依据水煤浆气化工艺的特点及要求,综合实际的使用状况,重点阐述了气化工艺中重要阀门的选择原则,为设计同类装置的工艺和仪表选型提供了重要依据。本文介绍了气化炉锁渣阀,氧气调节阀和切断阀,煤浆灰水控制阀,合成气蝶阀。 相似文献
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针对天然气长输管线压缩机组设计过程中遇到的技术难点——一键全目动顺序开车,通过分析低压电控设备及工艺管线阀门的启/停逻辑等多种影响因素,设计全自动开车系统,实现了压缩机组辅助设备的综合控制. 相似文献
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某煤化工装置,设置了1开1备两系列气化炉,灰水系统共用。为了节省投资,对水煤浆进料系统、氧气进料系统、洗涤塔系统进行优化。水煤浆进料系统进行合并,共用一台高压煤浆泵及相应的管线、自动切断阀,节省投资约275万元。氧气进料系统除部分使用Inconel外,其他地方使用不锈钢304L,节省投资约100万元。洗涤塔系统进行合并,共用一台文丘里洗涤器、一台洗涤塔及相应的管线、阀门,节省投资约180万元。 相似文献
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以某绿色煤电250MWIGCC气化炉设备为实践对象,对生产全过程的质量控制手段及结果进行详细的分析,对IGCC气化炉的质量控制进行理论上的研究与实践上的探讨,对类似项目的质量控制总结了经验。 相似文献
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结合福炼乙烯IGCC装置气化单元氧气管道施工经历,通过简析引起氧气管道燃烧、爆炸的原因,从项目实施管控角度,阐述福炼乙烯IGCC装置气化单元氧气管道施工过程中质量控制的方法。 相似文献
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兖矿国泰化工有限公司是以新型对置式多喷嘴气化炉为龙头的化电联产新型洁净煤利用企业,IGCC联产甲醇为国家"863"示范装置。投产以来运行稳定,变换与燃气热回收工艺的选择,既满足甲醇生产的需要,又满足IGCC中燃气轮机的需要,设计选择合理,对全系统的经济、稳定运行及优化IGCC联合循环发电的排放指标起到突出作用。 相似文献
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IGCC联产甲醇工艺为国家“863”项目示范装置,采用新型多喷嘴气化炉,煤处理量为1000t/d,配套240kt/a甲醇和71.8MW发电装置。自2005年10月投产以来运行十分稳定,其中变换与燃气热回收工艺的合理选择。对全系统的经济、稳定运行及优化IGCC联合循环发电的排放指标起到了非常重要的的作用。 相似文献
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Lili Cai Xiao-Yu Wu Xuefeng Zhu Ahmed F. Ghoniem Weishen Yang 《American Institute of Chemical Engineers》2020,66(7):e16427
Precombustion carbon capture is an effective strategy to reduce large-scale CO2 emissions, which is mainly used in the area of integrated gasification combined cycle (IGCC) power plants. Oxygen transport membranes (OTMs) were suggested as the air separation unit to produce high purity oxygen for the gasifier. However, the improvement in efficiency was limited. Here, a new IGCC process is reported based on a robust OTM reactor, where the OTM reactor is used behind the coal gasifier. This IGCC-OTM process fulfills syngas oxidation, H2 production, and carbon capture in one unit, thus a significant decrease of the energy penalty is expectable. The membrane reactor does not use noble metal components, and exhibits high hydrogen production rates, high hydrogen separation factor (103–104), and stable performance in a gas mixture mimicking real syngas compositions from a coal gasifier with H2S concentrations up to 1,000 ppm. 相似文献
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Kostas S. Hatzilyberis 《Fuel Processing Technology》2011,92(12):2429-2454
A non-ordinary type of solid fuel gasification reactor, which was under development for the few past decades and it is briefly described as indirect heat rotary kiln gasifier, seems to be capable of sufficiently satisfying the incorporated gasification needs in the most challenging contemporary power technologies using solid fuels, like IGCC and CLC combustion. The design of such a gasifier emerges in this work, while the focus is mostly on the presentation of the relevant theoretical model. Moreover, model predictions are compared and optimized with respect to experimental data that were acquired in a pilot scale gasification unit including the suggested type of gasifier. Comparisons showed successful predictions of such a marginal error that could be characterized as quite sufficient for a primary model validation. However, the model flexibility to a wide variety of different solid fuels, rotary kiln configurations and operating conditions has to be verified by assessment of further experimental results. 相似文献
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目前有部分轮胎半钢液压热板式硫化机在热工管路设计时,上下热板和模套的蒸汽管道冷凝水排放采用活塞切断阀方式(也称A/P阀,Air Pison Valve),通过PLC程序控制电磁阀的供/断气来控制切断阀定时排放冷凝水,从而实现蒸汽系统冷凝水的排出,虽然能实现冷凝水的排放,但会带来蒸汽的泄漏浪费,从而带来较大的能耗,本文就切断阀更换为疏水阀,节约蒸汽进行探讨。 相似文献
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Caixia Chen Takahiro Miyoshi Hidehiro Kamiya Masayuki Horio Toshinori Kojima 《加拿大化工杂志》1999,77(4):745-750
A two-stage air blown entrained flow gasifier is being developed in Japan for the IGCC process. However, its scale-up up faces significant difficulties because of ash/slag deposition problems. The ash/slag deposition in the gasifier depends on both the ash properties and entrainment produced by the swirling gas flow. Therefore, the flow hydrodynamics are critical issues for the control of the ash behavior. In this paper, a comprehensive simulation model is used to examine the effects of the gasifier geometry and jet configuration on the flow hydrodynamics in order to control the ash deposition on the gasifier walls. A swirl number for the multi-stage injection swirling gas flow is defined and proved to be the most important hydrodynamic scaling law for the entrained flow gasifier. 相似文献
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