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一、引言1.60万瓩的技术阶段法国电力公司最近已由25万瓩过渡到60万瓩的技术阶段,目前正在进行的两项工程是: 1)Porcheville电站2号机组,采用重油作为燃料; 2)Havre电站2号机组,包括一台锅炉,系由Stein et Roubaix公司与Alsthom公司合作制造。这台锅炉的最大连续蒸发量保证为1810吨/时,它可以采用煤粉和重油进行混合燃烧或分别燃烧。至于锅炉,60万瓩与25万瓩这两个等级之间,其区别仅在于蒸汽流量,而压力和温度则相同。实际上,蒸汽额定压力为195巴·绝对,这一压力已经相当接近于临界压力(221巴·绝对)。另一方面,汽温的提高势必增加所需奥氏体钢的数量,提
I. INTRODUCTION Technical phase of 60,000 tons The EDF has recently transitioned from a technological level of 250,000 tons to a technological level of 600,000 tons. The two ongoing projects are: 1) Unit 2 of Porcheville Power Station, which uses heavy oil as fuel; 2 ) Unit 2 at Havre Power Station, including a boiler, was manufactured by Stein et Roubaix in partnership with Alsthom. The maximum continuous evaporation of this boiler is guaranteed at 1810 t / h. It can be mixed or separately burned with pulverized coal and heavy oil. As for boilers, between 600,000 瓩 and 250,000 瓩, the only difference is the steam flow, while the pressure and temperature are the same. In fact, the steam has a nominal pressure of 195 bar · absolute, which is already quite close to the critical pressure (221 bar · absolute). On the other hand, an increase in steam temperature will inevitably increase the amount of austenitic steel required