The 1988 VGB Guideline for Boiler Feedwater,Boiler Water,and Steam of Steam Generators with a Permissible Operating Pressure of >68 bar-Is This Guideline Still Up-to-Date?

摘要

Since 1951,the VGB Guideline for Boiler Feedwater,Boiler Water,and Steam of Steam Generators has been the most acknowledged European fossil plant cycle chemistry guideline.The current edition is from 1988.Fifteen years is a long period when looking at developments in the power and related industries.Naturally,such developments markedly influence tasks and solutions in the field of plant cycle chemistry.For this reason,the question Is this guideline still up-to-date? is asked.An evaluation of any guideline requires consideration of the historical development of the guideline and the guideline-issuing organization.This is particularly important for overseas readers who are not familiar with either the VGB organization or the VGB Guideline for Boiler Feedwater,Boiler Water,and Steam of Steam Generators.Therefore,a brief historic overview precedes the actual evaluation.Of the many possible evaluation criteria,the applicability of the guideline in utility units with all-ferrous and mixed metallurgy,in units with drum boilers,and in typical "non-utility" (industrial) steam-generating installations is considered.In addition,the appropriateness of the guideline for combined cycles with multipressure heat recovery steam generators (and for a combination of once-through and drum boilers in one combined cycle unit),the utilization of state-of-the-art knowledge of power cycle and steam chemistry,and the suitability for advanced training of chemistry and operation staff in power plants are also subjects of this assessment.The evaluation reaches the conclusion that a reediting of this guideline is urgently required to ensure that the VGB organization remains a serious worldwide player in the fossil cycle chemistry field.