脱硫废水引入自平衡渣水系统的物理模型研究

Research on Physical Model of Introducing Desulphurization Wastewater into Self-balanced Slag Water System

[目的]为研究脱硫废水引入自平衡渣水系统后所产生的Cl^-的富集问题,建立了自平衡渣水系统中Cl^-的浓度变化的物理模型。[方法]通过所建立物理模型的稳态和瞬态分析,对渣水系统中Cl^-浓度的变化进行详细的理论推导,得到了可以应用于工程实践的计算公式,并利用推导所得的公式对具体工程案例进行了计算。[结果]结果表明:脱硫废水引入自平衡渣水系统后,Cl^-会在刮板捞渣机内逐渐浓缩富集,经过一段时间后最终达到平衡浓度。根据国内燃煤电厂的工程数据进行计算,最终平衡浓度一般为脱硫废水Cl^-浓度的2～3倍,达到最终平衡的时间一般在数百小时之内。[结论]所建立的模型和计算结果是正确并有效的,可为实际应用提供指导。

[Introduction]In order to investigate the enrichment of Cl^-in the slag water system,the physical model of Cl^-concentration change in self-balanced slag system is established. [Method]Through steady and transient physical model analysis,the calculation formula of the concentration change in the slag water system was deduced in detail. The concrete engineering case was also calculated by using the deduced formula. [Result]The results show that Cl^-will gradually enrich in the slag water system and gradually reach the equilibrium concentration after a period of time when the desulfurization wastewater is introduced into the self-balanced slag system. According to the domestic coal-fired power plant engineering data,the final Cl^-equilibrium concentration is generally 2 to 3 times of desulfurization wastewater Cl^-concentration. It reaches the final balance generally only within hundreds of hours.[Conclusion]The established model and calculation results are correct and effective,and can provide guidance for practical applications.