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介绍了中国石油天然气股份有限公司大庆石化分公司化工一厂老区裂解碳二加氢装置所使用的全部控制方案,实践证明该套控制方案设计合理、性能可靠、适应性强、操作灵活方便,达到了预期的效果。 相似文献
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以honeywell PKS系统PID参数的组成为依据,介绍honeywell PKS系统的PID参数整定方法。 相似文献
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孙增平 《化工自动化及仪表》2019,46(1)
以年产80万吨硫酸装置为背景,对过热蒸汽准确测量和由前馈(蒸汽流量)-串级(汽包水位-给水流量)组成的锅炉汽包液位三冲量控制系统设计进行了详细阐述。该系统有效克服了蒸汽流量和给水流量波动对液位的干扰,克服了"虚假液位"的影响。 相似文献
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叙述了FB2000型工控机在35t/h沸腾炉的应用,并给出了锅炉水位调节系统、燃烧控制系统、炉膛负压调节系统的控制方案。 相似文献
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《中国石油和化工标准与质量》2017,(24):117-118
介绍了汽包水位三冲量自动调节的量化控制策略,串级三冲量调节系统已经相当成熟,但在实际锅炉运行中各种原因导致水位自动调节系统投入困难,甚至自动不能投入。为此结合国内外石化项目,整理总结出三冲量的量化控制策略,通过实际运行,验证了其可行性和科学性。 相似文献
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描述了CBL-Ⅱ型乙烯裂解炉的先进控制策略,包括平均COT温度控制、管间温度平衡控制、总进料流量控制和汽/烃比控制,讨论了其工程实现问题,并给出了控制结果。 相似文献
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聚氯乙烯聚合反应过程的串级预测函数控制 总被引:6,自引:1,他引:5
介绍并分析了预测函数控制方法的主要思想和特点,并针对聚氯乙烯聚合反应装置采用串级预测函数控制方法进行控制,取得了很好的控制效果和经济效益。 相似文献
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Simple, explicit and physically intuitive Feedforward and Feedback control policies are designed for Fluidized Catalytic Cracking Processes. The Feedforward (FF) control algorithm compensates for changes in the feed rate and feed coking tendency by the use of the air flow and catalyst circulation rates as control variables to maintain the conversion and the reactor temperature at fixed levels. Through steady state and dynamic simulations the FF controller is shown to be very effective. To improve the dynamic response of the process and to account for the process/model mismatch a feedback (FB) controller is also designed to complement the FF action. The FB action is designed by use of the transformation related to the physical modes which correspond to the extensive variables of the process. It is shown that the required control structure consists of two loops. One uses the air flow rate to control the total sensible heat content of the reactor and regenerator solid phases. The other loop controls the regenerator enthalpy by changes in the catalyst circulation rate. The air flow rate controller includes an integral action to avoid reactor temperature offsets, while the catalyst circulation rate controller requires a nonlinear static observer to predict the coke concentration on the regenerated catalyst from dense bed and flue gas regenerator temperatures. The performance of the controller for changes on the oil feed rate, caking tendency of the feed, as well as for reactor temperature set point changes is faster and smoother than Kurihara's scheme. 相似文献
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通过对一理想模型的推算,比较模型与实际的结果,推算石墨化炉通电后期电阻公式。利用这一公式,可以通过调整装炉方法、产品规格等,选择合适的后期炉阻,以便最大限度地有效利用现有的石墨化炉和供电系统,充分发挥设备的最大功率和最大电流,生产出高质量的石墨化产品。 相似文献
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Design of one parameter tuning of three-mode PID controller was developed in this present study. The integral time and the derivative time of the controller were expressed in terms of the time constant and dead time of the process. Only the proportional gain was observed to be dependent on the implemented tunable parameter in which the stable region could be predetermined by the Routh test. Extension of the concept towards designing cascade PID controllers was straightforward such that only two parameters for the inner and outer PID controllers required to be tuned, respectively. The optimal tuning correlative formulas of the proportional gain for single and cascade control systems were obtained by the least square regression method. 相似文献
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:针对提高电阻炉温度的控制质量 ,研究了利用单片机实现以微分先行、P -PI为控制算法的智能化控制方案 ,给出了单片机的硬件组成和控制算法。实践证明该控制方案在性能指标如超调量、稳定时间和稳态误差等方面 ,取得了较为满意的结果 相似文献
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