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对烃烃分馏塔进行模拟计算,结果表明尽管原料处理量,组成及分离要求发生发显著变化,但经塔盘梢加堵孔改造后,通过大幅度降低幅操作压力,仍能进行塔的平衡操作,并得到符合要求的新产品。 相似文献
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孤网运行是电站运行中的特例,其运行工况和方式都与大电网运行有诸多不同之处,孤网运行系统中对电网频率进行控制的机组调速器更显得尤为重要。本文针对非洲加蓬大布巴哈电站孤网运行中存在的实际问题及调速器系统调试进行分析所取得的结论,可供同行相关人员参考。 相似文献
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通过对某燃气公司全自动焊机(包括全自动热熔焊机、全自动电熔焊机)产品质量与性能、相关人员素质与操作规范性、焊接记录完整性、破坏性试验及抽样方案的调研,分析提高PE燃气管道焊接质量的途径。 相似文献
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In order to obtain enhanced plasma parameters a complete new tokamak HL-2M is now under construction in Southwestern Institute of Physics. To assure the structural safety of the device for the entire operation cycle, one of the most important issues is the lifetime-limiting effects due to the pulsed operation mode. Fatigue is one of the major failure modes to be considered in mechanical design, and pulsed operation imposes stress with significant alternating components on the support structure (SS). Therefore, the reliability of the whole device is strongly affected by the stress and fatigue characteristic of the SS as the interface structure. This article introduces the SS design and details the fatigue life calculation methods based on the different characteristics of the sub-structures. The fatigue life in hazardous areas of the toroidal field coils anti-torque structure (TFCs-ATs) has been determined by non-linear analysis results. And with the stress- time history data of the vacuum vessel & poloidal field coils support structure (VV&PFCs SS), the fatigue analysis of the hot spots has been completed based on rain-flow counting method and linear cumulative damage method. The calculated minimum fatigue life on TFCs-ATs and VVSzPFCs SS is 4.743E+05 and 1.805E+06 cycles, respectively. And the calculated fatigue life on sub-structures can meet the required life for HL-2M tokamak: 1.0E+05 cycles. 相似文献
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准确的油井资料信息是油田开发科技水平不断提高、持续科学开发油田的先决条件,而单井日产液是油田开发生产中的基础资料。青化砭采油厂地埋斜底储油罐因各种原因导致罐体不规则,如按现用的参考理论值方法计算误差较大,致使单井日产液量计算准确率低。主要介绍为完成对不规则斜底罐的液位、容积精确测量,对液位计、流量计的实验选型,无线传感器网络的数据同步采集处理,上位机软件的开发,野外现场使用仪表及计算机的低功耗研究,定制高效可靠的通讯协议,采用一套科学的数字滤波和差值算法等,实现了快速、高效、准确的对不规则斜底罐容积自动化标定。 相似文献
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