排序方式: 共有20条查询结果,搜索用时 31 毫秒
1.
同步电机并列时,须具备以下四个条件:1.发电机电压有效值和电网电压有效值相等;2.发电机电压相位与电网电压相位相同;3.发电机电压相序和电网电压相序一致;4.发电机频率和电网频率相等。半自动并列装置即按照上述条件设计的。一、自动并列装置检测信号的选取其检测信号的选取,不外乎按同步发电 相似文献
2.
3.
4.
将废旧棉纤维和对苯二甲酸(TPA)在水热条件下以一定质量比进行碳化处理,采用X射线衍射分析(XRD)、傅立叶红外光谱分析(FT-IR)、扫描电镜(SEM)、X光电子射线能谱分析(XPS)及元素分析等方法研究TPA对废旧棉纤维物化结构特性的影响。结果表明:水热条件下棉纤维碳化产物形貌为具有无定形碳结构的不规则颗粒或棒状,且表面含有丰富的含氧官能团。随着TPA含量的增加,棒状产物增多,而TPA仅有少量发生降解或接枝到棉纤维碳产物的表面,其余可回收再利用。研究表明,水热条件下TPA虽未直接参与棉纤维的碳化过程,但TPA的存在使得碳化产物形貌多呈带有沟槽的棒状形态,与纯棉纤维碳化产物相比,粒径增大且C/O质量比降低。 相似文献
5.
通过对苏里格气田数字化集气站工艺过程和操作程序的HAZOP(危险及可操作性)分析,旨在对数字化集气站的基础设计进行安全性审查。利用系统的方法及专家小组的知识和经验,识别出设计中可能存在的偏差,以保证设备的作用符合工艺设计意图,确保系统安全,将危险发生的后果降低到最低限度。介绍了HAZOP分析的程序、要求和节点划分,总结了数字化集气站HAZOP分析涉及的主要问题及解决方案,HAZOP分析丰富并优化了系统整体的安全性和可靠性,很好地指导了施工图设计。 相似文献
7.
8.
In this study,based on the actual operating conditions of the cooling water treatment device of the associated gas recovery device and the water quality conditions of the supplement water,the water quality stability index calculation and water quality control model were constructed,and the software system for water treatment dosing process detection and remote data transmission service of water treatment equipment were developed,which were integrated with the hardware to form the water quality stability treatment device of the circulating water system.The application results in Zhuangyilian Light Hydrocarbon Plant showed that the qualified rate of water quality in water treatment plant was significantly improved,reaching 90%.
The concentration multiple of the circulating water system increased from 3 times to 10 times,with an increase of 200%.The sewage discharge amount of circulating water decreased by 80%.The trend of scaling and corrosion of water quality has been effectively controlled and alleviated,and there are no obvious scaling phenomenon in cooling water tower and heat-exchange equipment.The stable treatment of circulating water can realize "unattended operation". 相似文献
The concentration multiple of the circulating water system increased from 3 times to 10 times,with an increase of 200%.The sewage discharge amount of circulating water decreased by 80%.The trend of scaling and corrosion of water quality has been effectively controlled and alleviated,and there are no obvious scaling phenomenon in cooling water tower and heat-exchange equipment.The stable treatment of circulating water can realize "unattended operation". 相似文献
9.
随着苏里格气田气井开采时间的不断延长,气井低压、低产的特征表现越来越突出,部分气田由于产量很低不能完全满足气井完全携液生产的要求,井底及井筒产生的积液造成地层回压则增大,并加重了液面下油,套管的电化学腐蚀,同时由于水侵,水锁和水敏粘土矿物的膨胀,使气象渗透率大大降低,这严重影响了气井的正常生产。因此,急需开展排水采气工艺技术研究。 相似文献
10.
苏里格第一天然气处理厂位于乌审旗,处在苏里格气田的中部,是苏里格气田各区块天然气集中、处理、外输中心场站。本文介绍了不含醇污水处理系统在运行过程中存在的问题,并针对问题提出相应的优化措施。 相似文献