300 MW机组电袋组合式除尘技术的应用

为满足环保要求,保证脱硫设施的安全运行,洛河发电厂对2号锅炉电除尘器进行改造.即保留原电除尘壳体,1电场仍采用电除尘方式,将原2电场、3电场、4电场改为布袋除尘方式.实际应用结果表明,电袋组合方式除尘技术可满足除尘器出口含尘浓度低于50 mg/m3的环保要求,相对于增大原有电除尘空间的改造方案,可节省投资约200万元,节省电费约187.55万元,经济效益显著.     

国内首台350MW超临界锅炉制粉系统调整试验简介

对我国首台350MW超临界锅炉制粉系统调整进行介绍,为锅炉安全、经济运行及煤炭采购提供依据.     

国电泰州发电有限公司1 000MW机组防止给水流量波动大的方法探析

介绍了国电泰州发电有限公司一期2台1 000MW超超临界机组,通过对热工逻辑和运行操作2个方面的优化,减小给水泵切换时给水流量波动的方法,从而实现给水泵的并泵与切换更加简单和安全.     

10MW高温气冷实验堆项目管理系统的框架设计

介绍了１００ＭＷ高温气冷实验堆工程项目管理系统的初步设计框架，在此基础上，重点介绍了核工程管理信息系统（ＭＩＳ）和工程监控系统（ＰＭＳ）的功能设计以及ＭＩＳ各子系统的功能设计。本文在ＭＩＳ和决策支持系统（ＤＳＳ）的开发方法上也作一些尝试。     

WC-Co硬质合金表面MW-PCVD制备金刚石薄膜去钴预处理的研究

研究了ＷＣ－Ｃｏ硬质合金刀具表面微波等离子体化学气相沉积（ＭＷ－ＰＣＶＤ）制备金刚石薄膜时不同的去钴预处理方式的影响。扫描电子显微镜形貌观察和喇曼谱分析表明，利用氢－氧等离子体处理方式有显著的去钴效果，相应沉积获得的金刚石薄膜质量相对较高。与酸腐蚀处理相比，微波等离子体化学气相沉积装置中实现氢－氧等离子体处理方式具有独特的优越性。     

上空腔小破口失水事故模拟实验

文中给出了位于上空腔的中小尺寸接管破裂或安全阀意外开启引起的小破口失水事故的模拟实验研究情况。在实验中研究了系统压力,温度、空泡份额的变化和总失水量。总失水量约为初始装水量的20%。     

5MW THR燃料组件

本文介绍了5MW THR 燃料组件的设计原则、设计特性及其结构。并对其性能进行了分析与评价。     

华能玉环电厂1000MW超超临界机组的选型与特点

文章根据华能玉环电厂1000MW机组建设的实践,介绍了3大主机的结构型式,重点探讨了超超临界高参数大容量下的材料、设备选择,以及对相关的系统布置及设计理念也作了思考,所述内容对今后超超临界技术机组的推广有借鉴作用.     

Microwave preheating of anisotropic conductive adhesive films for high-speed flip chip on flex bonding

Anisotropic conductive adhesive film (ACF) can be preheated by microwave (MW) radiation in order to reduce the bonding time for flip-chip technology. Due to sluggish and nonuniform curing kinetics at the beginning of the curing reaction, thermal curing of epoxy is more time consuming. Therefore, MW radiation may be more effective, due to its uniform heating rate during the cycle. In this paper, MW preheating (for 1–4 sec) of ACF prior to final bonding has been applied to determine the electrical and mechanical performance of the bond. Powers of 80 and 240 W MW were used to study the effect of the MW preheating. A final bonding time of 6–7 sec can be used for flip chip on flex bonding instead of 10–15 sec (standard time for flip chip bonding) for MW preheating time and power used in this study. The contact resistance (as low as 0.01) is low in these samples, whereas the standard resistance is 0.017 ohm (bonded at 180°C for 10 sec without prior MW preheating). The shear forces at breakage were satisfactory (0.167–0.183 KN) for the samples bonded for 6–7 sec with MW preheating. This is very close and even higher than the standard sample (0.173 KN). For MW preheating power of 80 W and sweeping time of 2 sec, final bonding at 6 sec can also be used because of its low contact resistance (0.019 ohm). Scanning electron microscope (SEM) investigation of microjoints and fracture surface shows uneven distribution of conductive particles and thick bond lines in samples bonded for 5 sec (with MW preheating). Samples treated with MW radiation (80 W and 2–3 sec time) serve as evidence that well-distributed particles along with thin bond lines cause low contact resistance and high joint strength.