干式稀油柜柜内压力波动对外部管网的影响分析

随着近些年国内钢铁行业的发展,煤气柜在钢铁厂的应用日趋广泛,干式煤气柜因其储气压力高、活塞速度快等特点已被更多人所接受。文章讨论了用于储存高炉煤气和焦炉煤气的干式稀油柜柜内压力波动情况,分析了其压力波动对外部管网产生的影响,可以此作为指导来合理确定干式稀油柜的储气压力。     

打造“金牌文化”培养一流队伍——武钢炼铁厂创建“金牌文化”的探索

武钢炼铁厂创建“金牌文化”的提出炼铁厂是冶炼工序的重要单元.而高炉则是铁厂的重中之重.一是其生产的连续性.即高炉生产从投产之日到停炉之前,生产工艺不能间断.因此,遇到问题,要在最短时间内解决.二是生产的风险性.高炉设备是个密闭容器,操作稳定性不确定,外围原燃料的波动变化,直接影响到高炉的稳定顺行,影响到生产指标的完成,影响到能耗的增加,影响到公司的效益最大化,三是高炉是“高风温、高压力、高浓度煤气”的“三高”地域,安全生产形势刻不容缓.     

高炉煤气放散塔点火装置改造

原有点火燃烧技术在运行中局部存在问题,采用目前工艺先进的高炉煤气点火伴烧的高炉煤气放散塔点火装置技术。所选用的设备为武汉维特拉自动化电气工程有限公司WZGLF-III高炉煤气自动放散点火装置,该装置具有使用低热值煤气(600 KJ/Nm3左右)点火伴烧和燃烧稳定的特点。     

高炉煤气应用于烧结点火的生产实践

昆钢300m2烧结机采用高炉煤气通过双预热点火保温炉进行点火烧结,有效解决了高炉煤气燃烧不稳定、热值低等问题,提高了烧结点火温度,改善了表层烧结矿强度,满足了烧结生产需求,使高炉煤气资源在炼铁系统内部得到了合理使用,进一步降低了生产成本。     

天然气的进入对管网煤气质量的影响

近两年来,天然气开始大量进入广州市管网,在煤气构成中的比重越来越大。混和煤气中品种的多元化、组分的波动,对进入管网的煤气质量造成一定冲击。文章用质量系数分析煤气质量的变化状态,运用数理统计方法中的直方图分析煤气热值的分布规律,以此判断生产过程稳定程度,从而为生产控制作出相应的决策,确保产品质量达到要求。     

蓄热式加热炉节能生产实践

<正>一前言河北文丰钢铁有限公司轧钢厂成立于2004年。公司根据我厂缺少高热值燃料,而低热值的高炉煤气大量富余的实际情况决定采用高温空气贫氧扩散燃烧技术,建成了三座以高炉煤气为燃料,空煤气双预热的蓄热式中板连续加热炉。该技术可以同时将空、煤气预热到1000℃以上,使高炉煤气燃烧的热值达到加热板坯的温度要求,将排烟温度降到150℃以下,最大限度地     

TRT透平机顶压不能调节问题原因及改进

<正>为了使钢铁企业高炉冶炼的副产品高炉煤气的压力能回收,在大高炉上安装了高炉煤气余压透平发电装置(Blast Furnace Gas Top-pressure Recovery Turbine unit,TRT)。高炉煤气透平发电是利用煤气的炉顶余压,把煤气导入透平膨胀机做功,驱动发电机发电的能量回收装置,这种装置既回收了高炉减压阀组白白泄放的能量,又减少了管道振动,降低了噪音,大大改     

低压省煤器在热电厂的应用

热电厂五号全烧煤气锅炉在尾部水平烟道布置有高炉煤气加热器,用来回收烟气余热,以提高入炉煤气的初温。运行多年来,此台全烧煤气锅炉工况良好,锅炉效率一直稳定维持在设计值区域。为了进一步回收烟气余热,提高锅炉效率、降低吨钢能耗,在锅炉现有煤气加热器的烟气侧之后增设低压省煤器用于加热汽轮发电机凝结水,继续回收烟气中的余热,以实现热能梯级利用。     

浅析蒸汽管网损失原因剖析及控制策略

本文通过对酒钢蒸汽系统受产量、 用量、 仪表、 压力等原因影响,管道损失率一直波动较大,尤其在冬夏交替阶段及产量、用量大幅波动的情况下,损失率最高可达9%等问题.通过对管道泄水、 温度、 计量等因素的分析,得出影响的主要因素,针对影响因素制定相应蒸汽管网运行模式,达到降低蒸汽损失的目的.     

高炉煤气锅炉煤气扰动试验

为了提高全烧高炉煤气锅炉设计、改造技术水平,完善全烧高炉煤气锅炉运行操作技术能力,开展高温高压全烧高炉煤气锅炉过热器在燃料波动变化状况下的试验研究工作,试验主要基于锅炉在全烧高炉煤气的情况下,针对不同的过热器受热面布置量,在不同的蒸汽负荷下,进行不同的高炉煤气扰动量性能特征的试验测试,从而对高炉煤气锅炉运行操作和全烧高炉煤气锅炉改造设计提供借鉴依据和帮助。     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.     

Sixty years of discrimination and diversity research in human resource management: A review with suggestions for future research directions

This article reviews discrimination and diversity research published in Human Resource Management (HRM) over the past 60 years. While discrimination and diversity are very different constructs, it is often informative to study them together, because when people recognize each other's diversity, this can result in bias, stereotyping, and discrimination. We conducted bibliographic searches for terms related to discrimination and diversity as well as a manual search through every title and abstract published in HRM over the last 60 years to assess article relevance. The search resulted in 135 research articles with 136 unique studies (i.e., samples) which are reviewed in this article. Sex and race are the demographics that have been examined the most in HRM, while religion has been examined the least. Moreover, the number of studies examining lesbian, gay, bisexual, transgender, and queer (LGBTQ) employees in the workplace in HRM has grown quickly within the past 10 years, culminating in a recent meta‐analysis. Our review looks at some of the earliest research published, the most recent research published, and the overall trends we identified in the research over the years for both discrimination and diversity articles. We then make future research suggestions and recommendations to advance the study of discrimination and diversity in the coming years.     

The Early History of the Cumulants and the Gram-Charlier Series

The early history of the Gram-Charlier series is discussed from three points of view: (1) a generalization of Laplace's central limit theorem, (2) a least squares approximation to a continuous function by means of Chebyshev-Hermite polynomials, (3) a generalization of Gauss's normal distribution to a system of skew distributions. Thiele defined the cumulants in terms of the moments, first by a recursion formula and later by an expansion of the logarithm of the moment generating function. He devised a differential operator which adjusts any cumulant to a desired value. His little known 1899 paper in Danish on the properties of the cumulants is translated into English in the Appendix.     

Capturing the Implications of Services Trade Liberalization

This paper evaluates the impact of service sector trade liberalization on the world economy by a ten-region, eleven-sector CGE model with import embodied technology transfer from developed countries to developing countries. Simulation results show that service sector trade liberalization not only directly affects world service production and trade, but also has significant implications for other sectors in the economy. The major channel of the impact is through inter-industry input-output relations and TFP growth induced from services imported by developing countries from developed countries, which may be embodied with new information and advanced technology.     

City Children and Genderfied Neighbourhoods: The New Generation as Urban Regeneration Strategy

Former industrial cities in the West are employing gentrification as urban policy. In these policies, women and families currently play an important role as gentrification pioneers. In my analysis of Rotterdam in the Netherlands, I propose the term genderfication to understand the gender dimensions of this process. Genderfication refers to the production of space for different gender relations. I analyse Rotterdam's urban planning program for becoming a ‘child‐friendly city’, which entails replacing existing urban dwellings with new, larger and more expensive ‘family‐friendly homes’ as a strategy for urban re‐generation. Urban re‐generation supplements regeneration in the form of material and economic restructuring, and refers to the replacement of part of the current population by a new and better suited generation. The ‘child‐friendly city program’ is considered in tandem with punitive ‘youth policies’.     

Hierarchical Models in Environmental Science

Environmental systems are complicated. They include very intricate spatio-temporal processes, interacting on a wide variety of scales. There is increasingly vast amounts of data for such processes from geographical information systems, remote sensing platforms, monitoring networks, and computer models. In addition, often there is a great variety of scientific knowledge available for such systems, from partial differential equations based on first principles to panel surveys. It is argued that it is not generally adequate to consider such processes from a joint perspective. Instead, the processes often must be considered as a coherently linked system of conditional models. This paper provides a brief overview of hierarchical approaches applied to environmental processes. The key elements of such models can be considered in three general stages, the data stage, process stage, and parameter stage. In each stage, complicated dependence structure is mitigated by conditioning. For example, the data stage can incorporate measurement errors as well as multiple datasets with varying supports. The process and parameter stages can allow spatial and spatio-temporal processes as well as the direct inclusion of scientific knowledge. The paper concludes with a discussion of some outstanding problems in hierarchical modelling of environmental systems, including the need for new collaboration approaches.