钢铁企业无坡度敷设煤气管道跨距计算探讨

在分析了事故积水高度的来源基础上,对钢铁企业无坡度敷设的单管和有外加管道的煤气管道的跨度分别进行了强度和刚度计算,给出了管道跨距的简化计算方法。     

高炉煤气管道塌落事故的探讨

该厂Ｄ１８２０×８煤气管道突然塌落，文中从事故现场分析，对影响管道跨距的几个因素，如附加管道、管托、扭矩产生的切应力和管内积水进行了验算。指出事故的主因是管内积水和其它一些次因，并提出了相应的预防措施。     

焦炉煤气排水器堵塞处理方法改进

焦炭炼焦过程中产生的焦炉煤气经净化后可作为工业燃料，通过煤气管道提供给用户使用。然而，由于焦炉煤气中含有机械及化学杂质，主要通过煤气排水器下排尘管排出。焦炉煤气管道在长时间输送煤气的过程中,煤气沉积物持续积累在煤气排水器内部,若不及时处理将造成煤气大量积水，致使煤气管道有效管内径逐渐缩小,极大地降低管道长期输送煤气能力，严重时因积水过多造成管道支架超负荷。文中主要针对常年运行的焦炉煤气排水器堵塞问题，通过引用泄压阀对原有方法进行改进，有效避免了蒸汽烫伤与阀门开裂等安全隐患，排水器堵塞问题得到解决。     

钢厂煤气管道内腐蚀原因及防腐涂料的选用

钢厂煤气管道内腐蚀主要和煤气成分有关,对煤气管道进行内防腐是减缓管道腐蚀的较好办法.耐温环氧树脂、玻璃鳞片防腐涂料及石墨烯防腐涂料是当前煤气管道内防腐领域较受关注的内防腐涂料.分析了这几种防腐涂料的防腐机理及性能,并提出了选用意见.     

高炉炉顶粗煤气管道研究现状

对高炉粗煤气管道的相关文献资料进行归纳总结,得出了一些结论,可为相关工程设计提供有益参考.高炉炉顶粗煤气管道的连接方式主要有"裤裆管"式、"三岔管"式和"球节点"式,在使用过程中,高炉粗煤气管道出现的问题主要集中在上升管和下降管汇合处管皮和焊缝的开裂,以及下降管本身变形过大.     

AS流程负压区煤气管道沉积物的清除

针对负压区煤气管道淤堵的特点,利用"穿山甲"等新技术成功进行了包钢焦化厂二回收车间鼓冷工段煤气管道沉积物的清除,不仅解决了生产难题,同时,开创了国内负压区煤气管道不停产清淤的先例,为同行业提供了宝贵的经验和借鉴.     

煤气管道内壁腐蚀泄漏原因分析

城市生活煤气管道发生泄漏,昆钢技术中心用X、Pert MPD衍射仪对煤气管道内集水井附近的堆积物和紧贴腐蚀管道内壁表面的黑红色物质（管道锈蚀层）进行X射线衍射物相分析,并用扫描电镜能谱仪进行微观形貌观察,了解了其物相组成,探讨了煤气管道内壁的腐蚀机理。     

高炉煤气喷碱脱氯技术的应用前景

高炉煤气管道因烧结矿表面喷洒CaCl_2,高炉煤气中的氯酸根对煤气管道和不锈钢波纹管腐蚀严重,在每座高炉煤气干法除尘TRT出口和并入总管之前的管道内,利用双流体(氮气)雾化喷嘴,通过喷入一定浓度的碱液实现脱氯目的。     

煤气管道检修中的焊接质量控制

分析了碳素钢煤气管道焊接的质量管理方法,并且对煤气管道在检修中管道焊接质量控制的环节和方法进行了阐述,达到提高煤气管道检修工程质量的目的。     

煤气管道补偿问题探讨

煤气管道会因温度变化产生热胀冷缩,为保证煤气管道长期稳定安全运行,需对煤气管道进行补偿。在分析了对煤气管道进行温差补偿的必要性基础上,提出了常见的补偿方法,并对一些典型补偿问题进行了实例分析。     

煤气余热开发利用技术探讨

从发生炉出来的高温热煤气,需要进入双竖管、洗涤塔循环水喷淋,出炉热煤气几乎将70%以上的显热传给竖管循环水,大量的煤气显热被浪费。为节约能源,本文探讨安装一台废热锅炉进行煤气热交换,产生可以利用的新蒸汽和软化热水的可性行。     

利用循环氨水清洗煤气初冷器工艺改进

在焦化生产过程中,煤气中的焦油、萘类物质在初冷器内的换热管上遇冷凝结,导致煤气通道变小,系统阻力升高,冷却效果变差。分析认为：高温氨水是清洗初冷器换热管间焦油类物质既经济又有效的介质。经过对煤气初冷器的清洗喷洒系统进行改造,增加了外送泵和液位观察槽,初冷器阻力由3～4 kPa降至1 kPa,提高了清洗效果。     

Analysis of the quick corrosion of blast furnaces’gas pipes after the installation of dry-type de-dusting equipment and discussion about measures

Compared with the traditional wet-type de-dusting technology,the dry-type de-dusting technology is considered to be environmentally friendly and energy-saving.However,the pipes carrying the de-dusted blast furnace gas (BFG) tends to be corrosive more quickly and seriously.In order to investigate the reasons for the quick corrosion,the gas pipes and auxiliary bellows installed in Baosteel’s newly built BFG dry-type de-dusting system are studied.The corrosive properties of the condensed water,such as the pH value,are measured and analyzed.Meanwhile,various factors that may influence the corrosion rate of the pipes are studied by experiment.On the basis of the investigation and research,the causes of corrosion and leakage on the pipes are discovered.It is the process of dry de-dusting that is responsible,to a large extent,for the quick corrosion of the pipes.The equipment of spray tower is introduced and its effects are then discussed.This tower is designed to eliminate most of chloridion and neutralized the acid by spraying the alkaline water to the de-dusted gas flow.The practical operation shows that the tower helps to lessen the corrosiveness of the dry de-dusted gas effectively.The last part of this study analyzes the possible impacts of the dry-type de-dusting process of the newly built blast furnace (BF) on the main BFG piping which has been in the state of being corroded for years by estimating its potential corrosion rate,and some suggestions on maintenance are given as well.     

煤气换热器损坏原因分析及解决方案

针对鞍钢1700 ASP生产线加热炉煤气换热器损坏问题,从煤气换热器本身构造及外部环境进行系统分析,并采用化学检测等方法确定了换热器损坏的直接原因,具体为煤气管道中的水进入换热器内造成温度应力、内部煤气分流不均、空气换热器换热效果不佳等,并提出了改进煤气换热器结构、加大煤气管道排水能力、增加空气换热器换热而积的策略.     

利用高炉热风炉烟气余热生产热水实践

介绍了承钢2 500 m3高炉热风炉烟气余热在实施预热助燃风的基础上,采用热管换热技术,进一步回收烟气余热,加装热水发生器生产热水,供职工洗浴的工艺流程。该项目的实施可将排烟温度降至150℃以下,对降低炼铁工序能耗做出了积极贡献,推广和借鉴意义重大。     

喷粉在水冷金属型离心球墨铸铁管中的应用

为了消除水冷金属型离心球墨铸铁管的重皮、冷隔、气孔等铸造缺陷,降低管模的机械磨损及热疲劳,采用了向管横内喷撒SiBa-13合金粉的方法。经合理控制用量和喷撒工艺,消除了铸管气孔、重皮等缺陷,改善了冷却顺序,降低了热疲劳,提高了管模的使用寿命。     

珠江钢管公司在发展中崛起

叙述了珠江钢管公司发展UOE焊管的市场背景，以UOE工艺流程和X70级为代表的“西气东输”钢管的冶金工业水平，从而折射出这家公司在发展中崛起。     

我国铸铁管业的现状与发展

铸铁管的主要特点是强度高、韧性好、管壁薄、耐腐蚀 ,广泛应用于城市及工业供排水和燃气的输送等。铸铁管材质以球墨铸铁为主 ,主要采用连续铸造法。从国内外铸铁管生产及应用情况进行分析 ,提出了我国铸管行业的发展趋势。     

Set Sprinkler Irrigation and Its Cost

In this study, annual water application costs per unit area (ha) have been analyzed at the level of irrigation subunit in set sprinkler irrigation systems designed with pipes of different materials. In the cost, investment (pumping, pipes, sprinklers, ditches), energy, labor, maintenance, and water costs have been considered. Four systems were studied: one with buried pipes, in a permanent solid-set system, using: (a) polyvinyl chloride with buried pipes (PVCb), and three with pipes on the surface in surface solid-set systems, using (b) polyvinyl chloride pipes, (c) polyethylene pipes, and (d) aluminum pipes. The correct selection of the irrigation subunit size and shape can lead to a significant decrease in cost. The most economic irrigation subunits, among the four systems studied, were those formed by four laterals and a number of sprinklers per lateral of 10, 9, and 6 at 12?m×12?m, 12?m×18?m, and 18?m×18?m spacing, respectively. The most influential factor on the annual water application cost was spacing. Considering total annual cost, water cost was the most important, followed by investment and energy. Among the analyzed systems, the permanent system using PVCb produced the lowest annual water application cost per unit area.     

高炉煤气洗涤循环水管道结垢的酸性处理

本文介绍了高炉煤气洗涤循环水管道结垢情况，采用酸洗除垢方案的确定、设计、实施过程及效果。