烟气脱硫讲座在中国
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一本专门介绍镍及其应用的杂志 |
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FOUR FGD WORKSHOPS were attended by 110 people, representing 51 organizations. |
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镍杂志，2005年11 -- 中国正处于大规模的工业化过程中，因此出现了能源短缺，其结果是全国都在建设新的电站，实际上现在中国每年新建发电能力相当于整个英国的全部发电能力。中国所建的电站中，大部分是燃煤发电站，电站燃烧气体大大加剧了全国许多地方存在的本已严重的空气污染。为避免空气污染，必须对烟气体进行净化，而最常用的净化方法是安装湿法洗涤装置，将石灰石浆液喷入烟气，通过生成石膏脱除二氧化硫。
该工艺被称为烟气脱硫(FGD)，洗涤塔以及烟道和烟囱烟道等相关设备内的环境是强腐蚀性的。不锈钢和镍合金广泛用于烟气脱硫装置，已有30多年的经验。
为了使中国工程师、制造商和运行者们了解这些经验，9月份先后在上海、南京、杭州和北京举办了一系列烟气脱硫讲座。镍学会组织了这些讲座，并作了总体介绍，相关的不锈钢和镍合金供应商在讲座中作了主要发言。发言单位有蒂森克虏伯VDM、国际镍合金公司（Special Metal）、奥托昆普(Outokumpu)，美国冶联公司(Allegheny Ludlum)和罗兰公司（Rolled Alloys）。
代表51家机构的110名代表参加了讲座。鉴于发电和空气污染控制仍将是中国的主要问题，计划明年还将举办这类讲座。
New Welded Tube Standard
A new standard for welded stainless steel tube, long awaited by the market, has finally come to
light. It is outlined in EN 10217-7, "Welded steel tubes for pressure purposes – Technical delivery
conditions – Part 7: Stainless steel tubes."
The document is an essential reference for manufacturers and users of welded stainless steel tube. The tubes are used in various applications, some of which involve heat exchangers, equipment for the food industry, mechanical and civil constructions, chemical-pharmaceutical equipment, and tubes for conduction and plant engineering.
The new standard, once it has been implemented by all members of the European Community, will replace all national standards that have applied to this field.
EN 10217-7 will be subject to the procedure for inclusion in the new, harmonized standards under Directive 97/23/EC (PED - Pressure Equipment Directive). This will have an important bearing on the construction of tube bundle heat exchangers, which are subject to the above-mentioned directive, and on all devices considered to be under pressure (min 0.5 bar).
In the end, widespread national standards will be replaced with DIN 17457 and NF A 49-147, which were the references in Europe for quality welded stainless steel tube. The table below, extrapolated from a publication of the European Steel Tube Association, shows the national standards that will be replaced by EN 10217-7.
