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上、下布置双蓄热烧嘴在棒材加热炉上的技术应用
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作者 刘高年 侯峻巍 《中国设备工程》 2023年第24期196-198,共3页
蓄热式燃烧应用于棒材加热炉最基本的特点是极限回收烟气余热,且使用超低热值的煤气,燃烧温度也能满足棒材轧制的工艺温度要求。烟气余热极限回收是通过将空气与煤气同时加热至接近炉温来实现的。如果被预热至接近炉温的高温空气直接冲... 蓄热式燃烧应用于棒材加热炉最基本的特点是极限回收烟气余热,且使用超低热值的煤气,燃烧温度也能满足棒材轧制的工艺温度要求。烟气余热极限回收是通过将空气与煤气同时加热至接近炉温来实现的。如果被预热至接近炉温的高温空气直接冲刷钢坯,将造成严重的氧化烧损。本文重点介绍了昆玉钢铁棒材加热炉的高炉煤气双蓄热烧嘴布置采用上、下布置方式,在钢坯的上、下表面形成还原性气氛,将钢坯的氧化烧损降至最低。通过设计机理、操作和维护经验等剖析,将上、下布置双蓄热烧嘴获得更加成熟的应用与推广。 展开更多
关键词 极限回收 空煤气双蓄热 上、下布置 还原性气氛
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Capital Budgeting: Methods, Aspects, and Issues
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作者 E. Tylor Claggett 《Journal of Modern Accounting and Auditing》 2018年第2期90-101,共12页
This paper furthers the understanding of capital budgeting (CB) processes. It emphasizes the assumed disposition of the forecast cash benefits from projects. The two reasons for CB are discussed. First, which projec... This paper furthers the understanding of capital budgeting (CB) processes. It emphasizes the assumed disposition of the forecast cash benefits from projects. The two reasons for CB are discussed. First, which projects are and are not acceptable from a financial prospective? Second, of financially acceptable projects, CB methods can rank or order projects relative to desirability. Under conditions of certainty, the paper describes and contrasts three primary methods: pay back (PB), net present value (NPV), and internal rate of return (IRR) and three secondary methods: profitability index (PI), terminal value (TV), and modified internal rate of return (MIRR). The presentation lists the strengths and weaknesses of each method in order to direct attention to some of the many aspects of CB decisions that firm managers should consider. Next, approaches for taking risk into consideration are discussed. The discussion raises the important issues of what to do with the net cash benefits from various projects when and if they are received. Finally, the paper provides flexible tools and example problems for teaching CB in a variety of contexts, such as professional corporate training or academic coursework. 展开更多
关键词 company finance corporate finance corporate investment finance education
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