石灰石—石膏湿法烟气脱硫工艺不宜安装烟气换热器

随着电力工业的快速发展,特别是环境保护要求的提高,火电厂烟气脱硫(FGD)设施建设不断加快,迄今为止,国内外已开发出数百种烟气脱硫技术,其中大型火电厂机组烟气脱硫均以石灰石—石膏烟气脱硫湿法工艺为主,并已成为我国燃煤电厂烟气脱硫的首选工艺。而烟气脱硫湿法工艺是否需要     

脱硫石膏的生产工艺及其综合应用

脱硫石膏是电厂对产生的烟气进行脱硫净化处理得到的工业副产石膏。烟气脱硫治理分干法、半干法和湿法3种,目前使用最广泛的脱硫方法是湿法脱硫,约占脱硫总量的80%以上。     

火力发电厂湿法烟气脱硫工艺主要调节回路

湿法烟气脱硫需要将一些化学和物理工艺参数维持在规定范围内,以获得稳定的性能和最佳经济效益.本文将对湿法烟气脱硫工艺主要调节回路中的SO2脱除效率控制,FGD入口烟气流量控制的各种控制方法进行了介绍.     

150MW机组关于锅炉脱硫的研究

本文介绍了150MW机组锅炉脱硫方案选择情况,对目前煤粉锅炉的烟气脱硫技术进行了介绍,重点对石灰石一石膏湿法脱硫工艺及CFB干法烟气脱硫工艺方案进行了技术经济比较。对项目烟气脱硫方案选择进行了分析探讨。     

湿法脱硫常见问题的分析

湿法烟气脱硫的优点是脱硫效率高,一般可达95%以上;单机烟气处理量大,可与大型锅炉单元匹配;对煤种的适应性好,烟气脱硫的过程在锅炉尾部烟道以后,是独立的岛,不会干扰锅炉的燃烧,不会对锅炉机组的热效率、利用率产生任何影响.目前常见的湿法烟气脱琉有石灰石/石灰-石膏法、钠洗法、双碱法及氧化镁法等.湿法脱硫技术已经很成熟,但是在施工和设计中也出现了一些问题,业主在质保期内也会提一些其他问题,笔者就针对出现的问题作了详细的整理,以供参考.     

影响湿法烟气脱硫效率的因素分析

通过对平凉电厂湿法烟气脱硫工艺过程的分析,从原料、烟气和工艺控制三方面分析影响脱硫率的各种因素,对运行实践具有一定的指导意义.     

喷淋吸收塔石膏浆液ph值控制对系统安全性的影响

石灰石(石灰)-石膏湿法脱硫是燃烧后烟气脱硫的典型技术.吸收塔石膏浆液ph值的控制不好将造成系统设备结垢,甚至设备腐蚀损坏.ph值控制与烟气脱硫效率和系统设备的安全运行密不可分.     

浅议如何做好电厂烟气脱硫环保工程

电厂烟气脱硫环保工程是一项非常重要的工作，它直接关系着人们的身体健康和生命安全，更与我们所居住的环境育有着紧密的联系。目前,世界上主要有三种脱硫技术：干法脱硫、半干法脱硫和湿法脱硫，其中脱硫效率最高的是湿法悦观，它运行穗定、没有二次污染因此备受人们推崇。     

我国烟气脱硫的现状

我国是二氧化硫排放大国,并且已位居世界第一位,给我国带来了巨大的经济损失,如:生态平衡的破坏,森林的破坏,建筑物的腐蚀等.本文介绍了对二氧化硫控制技术,综述了烟气脱硫技术中湿法、干法、半干法的优缺点,针对我国的国情,开发了循环流化床烟气脱硫技术,并且简单的介绍了循环流化床烟气脱硫技术在我国的研究进展和应用情况.     

湿法脱硫吸收塔安装过程控制

为了保证火力发电厂湿法脱硫吸收塔内部结构件和外部连接管道安装质量,阐述了烟气脱硫工程吸收塔施工过程中垂直度、各定位尺寸及焊接变形的有效控制过程,保证了吸收塔的安装质量,延长了吸收塔的使用寿命.     

美债危机的成因、影响及我国未来的经济政策走势分析

美债危机的成因主要在于三个方面,即美债累积数额巨大;世界经济复苏放缓凸显了美债违约的严重性;美国两党未能及时达成共识,没有给市场充分消化的时间,引发了投资者恐慌情绪的蔓延等。美债危机短期内对我国经济的不利影响有限,但长期看将进一步推动我国经济结构调整和外汇投资多元化进程。我国经济增长不会出现大幅下滑,经济结构调整步伐将进一步加快;人民币升值趋势将加快;输入性通胀压力依然严峻;政策进入观望期,紧缩政策可能出现微调;外汇储备风险增加,多元化投资进程将加快。     

Systemic Cooperative Actions among Competitors: the Case of a Furniture Cluster in Brazil

The purpose of this article is to describe cooperation practices observed in competitors companies in a furniture cluster in Brazil. The literature refers to it as coopetition. The research method was the multiple case study. The main research technique was the semi-structured interviews with practitioners of the cluster. The study created a theoretical framework for cooperative practices in industrial clusters formed by four types of practices: logistics, marketing and sales, formation of the workforce, and innovation and technology. The study investigates these four types of cooperation in five large companies that compete in the same market, the anchor companies of the cluster. The only entirely complied type of collaboration is the formation of the workforce of the cluster. In the other practices, cooperation involving competitors is lower than reported in the literature. The main reason for this low cooperation is excessive rivalry and mutual distrust in the cluster, and competition by differentiation, which partially prevent the gain of scale provided by cooperative actions.     

ICP-MS法测定小麦淀粉中的钯

将试样先在微波消解仪中消解,在1.5%HNO3溶解后,用ICP-MS法直接测定药用辅料小麦淀粉中微量钯。对试样处理方法、Pd元素分析谱线、基体的影响、背景校正、仪器分析参数等进行了研究,确定了最佳实验条件。测定范围为0~19.9μg/L,加标回收率为98.0%,相对标准偏差为2.6%。该方法操作简便、快速、准确。     

多站制CW雷达目标动态模拟器设计

针对多站制连续波（CW）雷达工作特点,设计了一种CW雷达目标动态模拟器,满足多站连续 波测 量系统动态模拟联试的需求。采用高性能CPCI工控机作为模拟器硬件平台,信号处理单元 以CPCI板卡为载体,模拟控制信息依据弹道数据生成。模拟器通过控制测距信号的时间延迟 ,实现目标距离变化的模拟;通过载波频移控制,实现目标速度的模拟;通过数控衰减器控 制模拟信号的幅度,实现目标信号强弱的模拟。通过多站制测量系统动态模拟联试,验证了 模拟器的有效性和距离与速度的相关性。     

长沙走马楼吴简商业税献疑

吴简中出现了很多关于"僦钱"、"地僦钱"的记录,这些简牍给研究者带来了很多困难,其实这种制度与汉代有密切关系,西汉中期以后边郡战事频繁,物资转运甚重,因而雇佣民车转运粮草很普遍,汉简常见"就人"、"就直"和"就钱"等,其反映的含义与粮草的转运密切相关。吴简中的僦钱不是商业性之"租赁费",而是转运税,是一种政府定期征收的财政税目,而"地僦钱"账簿表示的就是一种记录临湘侯封地征收转运税的总账簿。     

经济全球化和企业发展战略

本文认为,经济全球化主要有四个特点:第一,以金融为核心。世界金融一体化主要表现为货币的虚拟化程度增加,各国货币之间的汇率会因其购买力的变化而产生较大波动,资本跨国流动的规模增大,速度加快,虚拟经济膨胀,世界金融市场的集成度提高。第二,以知识为基础。即以知识为基础的产业在产业结构中占主要成分,知识在生产力构成中发挥重要影响,在经济增长中起主要作用,与知识有关的成本在产品成本中占有较大的份额。第三,以信息技术为先导。信息技术缩小了空间距离,争取了时间,提高了效率。第四,以跨国公司为载体。文章提出,培养我国的跨国公司非常重要,企业在实现跨国经营的过程中要从全球的角度制定企业发展战略,从全球的角度考虑盈利模式和商业模式。     

Czech privatisation 25 years later

Privatisation is still a hot political topic today and divides economists as well as politicians and the general public. The paper aims to capture the Czech privatisation in its historical, economic and political contexts. The first part explains the difference between transitional privatisation and standard privatisation. The second part examines the interests in the privatisation process. The third part discusses the privatisation methods used in the Czech Republic. The fourth part offers an international comparison.     

Incentivising public service contracts: a methodology and recommendations

In October 1995 HM Treasury set up a number of working groups to examine the feasibility of applying the aspects for change listed in the White Paper ‘Setting New Standards’. The aspect of incentivisation was examined by a highly defined Research Group. The major findings of the group are contained within this case study. The Research Group was chaired by the author and the organisations represented on the group were: The Department of Transport, The Department of the Environment, HM Treasury, National Rivers Authority, The NHS Supplies Authority, Inland Revenue, The Defence Research Agency and the National Audit Office. The work the author previously published in the EJPSM (Jones, 1997) made reference to traditional Government and Public Sector contracting models that have been applied. The fixed price/cost plus type of contracts were seen to have limitations. Incentivisation within public sector contracts was suggested as a way forward for developing Government purchasing.This suggestion poses the question of how we perceive, judge and assess the use of incentives in contracts; what concepts are at the root of the term? The author chaired a UK Government Research Group which considered the concept, suggested a methodology for application and recommended action. In following this process the concept of incentives in contracts proved the most difficult to pin down. The task was completed and accepted by the UK Government. This article explains the general detail of the work, commencing with concepts of incentivisation.     

葡萄酒中恶霜灵残留液相色谱-串联质谱检测

[目的]建立了葡萄酒中中恶霜灵残留量的液相色谱-串联质谱分析方法。[方法]样品直接注入液相色谱仪,经AgilentXDB-C18色谱柱分离,以0.1%甲酸水溶液和乙腈为流动相进行梯度洗脱。以电喷雾正离子（ESI＋）模式电离,多反应监测（MRM）模式检测,基质匹配标准溶液外标法定量。[结果]恶霜灵2-400μg/L范围内呈线性相关,相关系数（r）均大于0.999;其定量限为5μg/L。葡萄酒样品在5、10和20μg/L添加水平时,恶霜灵的回收率范围分别为91.5%-111.2%,相对标准偏差（RSD）分别为6.2%-8.6%,可以满足葡萄酒中恶霜灵残留量的检测需要。[结论]本方法无需前处理,灵敏度高,选择性好,同时定性定量,对葡萄酒中恶霜灵含量的测定及评估更为准确。     

The Euro versus the U.S. dollar: an overview

The creation of the euro will prove to be a remarkable development in international relations and carries far-reaching implications for the international monetary system. The objectives of this paper are four-fold. The first objective is to provide a brief overview of previous monetary unions in Europe. It covers three surviving monetary unions and two that failed. The second objective is to provide a review of major developments leading to the creation of the euro. The third objective is to analyze the opportunities and threats associated with the euro. The fourth objective is to provide an overview of the on-going debate as to whether the euro will be a serious challenger to the U.S. dollar.