制氢装置水碳比的交叉限幅控制方案  

Cross limit control of water to carbon ratio of hydrogen generation plant

作　　者：崔欣[1] 张彩慧[1] 席小明 

机构地区：[1]中国石油化工股份有限公司洛阳分公司,河南省洛阳市471012

出　　处：《炼油技术与工程》2016年第10期45-47,共3页Petroleum Refinery Engineering

摘　　要：制氢装置一般进料种类较多,进料量不稳定,正常生产过程中系统压力波动较大,调整不及时可能会引起转化炉水碳比失调,造成转化催化剂结炭、失活。根据装置多种进料的实际情况,提出水碳比交叉限幅控制方案,通过单独核算每股进料的碳含量,以此作为依据计算混合进料的碳含量,当上游外来进料性质变化不大时,可以保证负荷调整过程中碳含量计量的准确。同时通过高低选择器调整蒸汽流量和原料流量,确保水碳比始终在设定范围内,满足生产调整负荷的需要。与传统的水碳比控制方案相比,交叉限幅控制方案操作便捷,更有利于指导调整生产,保护转化催化剂长周期运行。Since there are many types of feedstocks for hydrogen generation plant, the unstable feedflow- rate, greater fluctuation of system pressure in normal operation will lead to the failure of control of water to carbon ratio of reforming furnace and coking and deactivation of the reforming catalysts if they are not timely con- trolled. Based upon the multiple feeds conditions of the unit, the cross limit control of water to carbon ratio is proposed. The carbon in each stream of feedstock is independently calculated, which is the basis for the calculation of total carbon in the mixed feed. When there are no great variations of properties of feedstock from up-stream units, the carbon content in the adjustment of operating capacity can be correctly calculated. In addition, the water to carbon ratio can be always maintained within the design range to meet the requirement of capacity adjustment through control of steam flowrate and feedstock flowrate by high-low selector. As compared with the conventional control scheme of water to carbon ratio, the cross limit control is easy in operation, favorable for operation adjustment and good for the long-term operation of catalysts.

关 键 词：制氢装置 水碳比 交叉限幅 控制方案 

分 类 号：TQ116.2[化学工程—无机化工]