基于发电厂电缆防火的探讨

针对发电厂电缆火灾事故时有发生的情况,分析了发电厂电缆火灾事故的起因、特点及危害。从如何预防电缆着火以及阻止火灾蔓延等方面,详细地讨论了发电厂电缆的防火措施,对保证电厂安全生产、防止电厂电缆火灾事故的发生有一定的参考价值。     

马钢新区制水厂工艺设计简述

简要介绍了马钢新区制水厂工程的设计指导思想及基本设计情况。对该工程工艺设计流程,主要处理构筑物进行了简要说明。     

Body composition and self-perceived health and fitness among indoor sports participants

Abstract

This paper examines (1) the responses of participants in specific indoor sports to questions regarding their self-perceived health and fitness, and (2) the relation betweeen these responses and body composition. A representative sample of indoor sports participants (n = 4308; 2938 male and 1370 female) from six cities in the United Kingdom responded to a questionnaire concerned with their self-perception of health and fitness. Height and weight was established from self-report and a body mass index (BMI) was calculated. Seventy eight percent of males and 85% of females reported their health as ‘good’ or ‘excellent’. Less than 2% of the sample reported their health as ‘poor’ or ‘very poor’. However, only 67% of males and 67% of females reported their fitness as ‘good’ or ‘excellent’. Again, the proportion of the sample reporting ‘poor’ or ‘very poor’ fitness was low; less than 4%. The question on health was compared with a recent general population survey and this yielded markedly more ‘unfavourable’ results; only 72% of males and 70% of females reported their health as being ‘good’ or ‘excellent’. A comparison of the response category groups for BMI showed significant differences between the ‘poor’ and ‘fair’ groups but not between the ‘good’ and ‘excellent’ groups.

It is concluded that: (1) indoor sports participants regard their health and fitness highly, but their fitness less so than their health; (2) adiposity tends to be associated with poorer perceptions of health and fitness; (3) women sports participants perceive their health more highly than others of the same age compared with men, yet the reverse is true of fitness.     

多机组集中控制技术在克拉玛依电厂的应用

介绍了克拉玛依电厂多机组集中控制系统的结构及说明,并对多机组集中控制、自动发电控制以及厂级监控信息系统进行了深入研究。     

火电厂管道螺纹吊杆最大使用荷载计算研究

火电厂管道螺纹吊杆最大使用荷载是设计和选择螺纹吊杆的重要依据,然而现有的相关规定给出的结果并不相同,造成在相同设计条件下选择的螺纹吊杆规格并不相同,影响了螺纹吊杆的准确设计和选择。为规范螺纹吊杆的设计和选择,确保火电厂的安全和经济运行,对螺纹吊杆最大使用荷载的相关问题进行了分析和探讨。分析和探讨了与螺纹吊杆最大使用荷载有关的螺纹根部截面积计算方法、许用应力确定以及材质选择等问题,并给出了相应的措施和建议。分析和研究了螺纹吊杆最大使用荷载计算方法,基于许用应力法给出了螺纹吊杆最大使用荷载计算结果。     

绿色生态法治理火力发电厂灰场扬尘

针对国电双鸭山发电有限公司储灰场扬尘问题,阐述了覆土造田法、喷淋法、无纺布法、表面固化法、灰场种植法等储灰场治理方法,通过比较,发现灰场种植法即＂生态林＂防尘固灰效果好,实施简单,维护量少,有效地治理了灰场扬尘,改善了周边环境。     

A New Water Saving Device of Swirling Flow for Cooling Towers

This paper is concerned with water saving for water-loop cooling tower system in power plants. A newly developed water saving device of swirling flow is presented. The key point is that the new water saving device makes the steam swirl up along the device wall rather than engender laminar flow in a corrugated plate. The corrugated plate device can save approximately 10 percent of the total lost water. In contrast to the scale model of corrugated plate water saving device, experimental analyses have demonstrated that the new water saving device of swirling flow is more efficient, with a capacity of saving more than 20 percent of water.     

大容量核电机组接入川渝电网适应性及参与系统调峰研究

结合四川、重庆电网的实际系统,重点从电网的潮流分布、送出线路选型、电网稳定校核、短路电流水平计算以及是否参与系统调峰运行等多方面,研究分析2020年大容量核电机组(2×175万kW)接入川渝主干电网后对川渝电网的可能影响。研究表明:大容量核电机组较为合理的接入系统方案,既能满足核电送出需要,又可以控制系统短路电流水平,远景规划年份川渝主干电网总体上能适应大容量核电机组的接入系统;同时,大容量核电机组根据电网需要实时承担系统部分调峰任务后,可实现减少川渝电网丰期调峰弃水和节约燃煤的节能减排的经济、社会和环保等多方面综合效益。     

循环水阻垢缓蚀剂在新昌电厂的应用

针对新昌电厂循环水的低硬度、低碱度水质特点,通过大量试验,筛选复配出适合低硬度低碱度水的阻垢缓蚀复合药剂.该阻垢缓蚀复合药剂在新昌电厂1年的应用效果证明,使用缓蚀阻垢剂能够较好地控制循环水系统的腐蚀与结垢问题,通过药剂的协同增效作用,能使循环冷却水的浓缩倍数达到6左右.     

抗燃油在徐州发电厂的应用

从数字式电液控制(DEH)系统的结构布置合理性、启动前系统的清洁、安装检修工艺的质量及抗燃油的新油验收、运行中油质量监督、加强技术管理等方面介绍了徐州发电厂抗燃油系统使用抗燃油的经验,指出要保证抗燃油安全运行必须系统、全面地做好汽机、化学的相关工作,把好每一个环节的质量关。