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CFD Modelling of Industrial Plant from a Viewpoint of Dioxins Formation

机译：从二恶英形成的角度看工业厂房的CFD建模

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摘要

Design procedures of thermal industrial plant should take into account all aspects governing future plant emissions, in order to devise in due course all necessary primary (preventive) as well as secondary (curative) measures. For dioxin-sensitive operations, such as incineration and thermal metallurgical processes, the specific characteristics of dioxin formation and destruction should be carefully considered from the start. This means that different dioxin-relevant plant operating parameters, such as gas and particle flow, field of temperature, oxygen concentration and dust content of the off-gases, the residence times of entrained particles and – as far as possible - their contribution to dioxin formation should be established. The possibilities and limitations of the method are highlighted and a number of possible primary and secondary measures are presented. The best method of establishing the data required is based on Computer Fluid Dynamics (CFD) studies, which should be an intrinsic part of plant design. This CFD-analysis may proceed, e.g., by means of the FLUENT programme, which was initially co-developed by one of the authors (J.S.) and thoroughly tested for dioxin applications during the MINIDIP programme.
机译：热力工厂的设计程序应考虑到控制未来工厂排放的所有方面，以便在适当时候制定所有必要的主要（预防）和次要（治疗）措施。对于焚烧和热冶金过程等对二恶英敏感的操作，应从一开始就认真考虑二恶英形成和破坏的具体特征。这意味着与二恶英有关的不同工厂运行参数，例如气体和颗粒流量，温度场，氧气浓度和废气中的粉尘含量，夹带的颗粒的停留时间，以及（尽可能）它们对二恶英的贡献应该建立阵型。强调了该方法的可能性和局限性，并提出了许多可能的主要和次要措施。建立所需数据的最佳方法是基于计算机流体动力学（CFD）研究，这应该是工厂设计的固有部分。可以通过例如FLUENT程序进行CFD分析，该程序最初由一位作者（J.S.）共同开发，并在MINIDIP程序中经过了彻底的二恶英应用测试。

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