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首页> 外文会议>International Chemical Recovery Conference v.1; 20040606-20040610; Charleston,SC; US >A Historical Look At The Development Of Alternative Black Liquor Recovery Technologies And The Evolution Of Black Liquor Gasifier Designs
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A Historical Look At The Development Of Alternative Black Liquor Recovery Technologies And The Evolution Of Black Liquor Gasifier Designs

机译：对替代性黑液回收技术的发展以及黑液气化炉设计发展的历史考察

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Ever since the introduction of the Tomlinson recovery boiler, industrial and academic groups have worked on developing alternative recovery technologies that promise safer operation, higher efficiencies and more flexible processing options. The variety of proposed approaches is remarkable, but most—particularly those developed in the past 30 years—center on black liquor gasification. The gasification technologies are roughly evenly split between low temperature, operating below the melting point of the inorganic compounds (ash), and high temperature or smelt-phase systems. The fact that no commercial alternative to the recovery boiler is yet available is testament to the challenges associated with black liquor recovery. This paper reviews nearly two dozen of these alternative technologies, describing the processes and identifying why development was ultimately abandoned. Common threads are recognized: low temperature processes have problems achieving good conversion while avoiding ash agglomeration; high temperature processes suffer material problems caused by extremely corrosive conditions. In nearly all cases, funding has been unstable or withdrawn before the technical hurdles were overcome. The two gasification processes now under development are approaching commercial viability. Consequently, funding is shifting away from development of new recovery process concepts and towards improvement of these two technologies.
机译：自从汤姆林森回收锅炉问世以来，工业和学术团体一直致力于开发替代回收技术，以保证更安全的操作，更高的效率和更灵活的处理选择。提议的方法种类繁多，但大多数（尤其是过去30年来开发的方法）以黑液气化为中心。气化技术大致分为低温，低于无机化合物（灰分）熔点的操作温度和高温或熔融相系统。回收锅炉尚无商业替代方案这一事实证明了与黑液回收相关的挑战。本文回顾了近二十种这些替代技术，描述了这些过程并确定了为什么最终放弃了开发。公认的通用螺纹：低温工艺在避免灰分结块的同时实现良好转化的问题；高温过程会遭受由极度腐蚀条件引起的材料问题。在几乎所有情况下，在克服技术障碍之前，资金一直不稳定或被撤回。目前正在开发的两种气化工艺已接近商业可行性。因此，资金正在从开发新的回收工艺概念转移到改进这两种技术。

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