工业循环冷却水系统过渡过程分析研究

发布时间：2018-03-05 19:33

本文选题：工业循环冷却水系统　切入点：过渡过程　出处：《扬州大学》2015年硕士论文　论文类型：学位论文

【摘要】：循环冷却水系统是钢铁企业、石化企业和火电企业等基础工业系统的重要组成部分,为保证整个系统的安全运行起着重要作用。其中,循环冷却水系统循环泵在开机和事故停泵等工况下,易产生较大水锤压力和长时间的压力波动,造成水锤事故,导致管道和系统设备等的损坏,最终影响整个生产系统安全运行。因此,开展工业循环冷却水系统过渡过程的研究,为系统设计和管路及设备强度校核提供依据,对保证循环冷却水系统安全稳定运行,具有十分重要的意义。本文在江苏省产学研前瞻性联合研究项目和扬州市—扬州大学市校合作基金资助下,对工业循环冷却水系统过渡过程开展研究,主要研究工作和成果如下：(1)分析了不同工业循环冷却水系统的结构形式和主要设备。(2)根据水泵全特性曲线数据三维可视化模型,预测不同比转速的水泵全特性曲线数据。(3)介绍了循环冷却水系统过渡过程计算的特征线法,利用基于特征线法的Flowmaster软件对几种典型工业循环冷却水系统进行了建模仿真,计算了系统循环水泵开机起动过渡过程、不同关阀规律下系统事故停泵过渡过程和不同台数水泵事故停泵的过渡过程,并对计算结果进行了分析。(4)计算分析了事故停泵过渡过程对不同供水管径和不同供水方式下循环水系统的影响；在考虑过渡过程对系统的影响的基础上,针对循环冷却水系统循环水水管的选择提出了建议；对循环水管路布置提出了一些参考原则；介绍了可供循环水泵出口选择的阀门和空气罐等水锤防护措施。
[Abstract]:The circulating cooling water system is an important part of the basic industrial systems such as iron and steel enterprises, petrochemical enterprises and thermal power enterprises, and plays an important role in ensuring the safe operation of the whole system. The circulating pump of circulating cooling water system is easy to produce large water hammer pressure and long time pressure fluctuation under the working conditions such as start up and accident stop pump, resulting in water hammer accident, resulting in pipeline and system equipment damage, etc. Therefore, the research on the transition process of industrial circulating cooling water system can provide the basis for system design and strength check of pipes and equipment, and ensure the safe and stable operation of circulating cooling water system. This paper studies the transition process of industrial circulating cooling water system under the support of Jiangsu Prospecting Joint Research Project and Yangzhou-Yangzhou University City School Cooperation Fund. The main research work and results are as follows: (1) the structure and main equipment of different industrial circulating cooling water system are analyzed. (2) according to the data of the whole characteristic curve of water pump, the 3D visualization model is analyzed. The characteristic line method for calculating the transition process of circulating cooling water system is introduced. Several typical industrial circulating cooling water systems are modeled and simulated by Flowmaster software based on characteristic line method. The transition process of system circulating water pump starting up, system accident stopping pump under different shutoff valve law and different number of pump accident stop pump are calculated. The effect of the transient process of the accident shutdown on the circulating water system under different water supply pipe diameters and different water supply modes is analyzed, and the influence of the transition process on the system is considered. Suggestions on the selection of circulating water pipes for circulating cooling water system, some reference principles for the arrangement of circulating water pipes, and water hammer protection measures such as valves and air tanks for outlet selection of circulating water pumps are presented.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ085

【相似文献】