CIESC Journal ›› 2020, Vol. 71 ›› Issue (8): 3741-3751.DOI: 10.11949/0438-1157.20200149

• Energy and environmental engineering • Previous Articles     Next Articles

Modeling and simulation of wet desulfurization system dynamic process

Shuangchen MA1(),Quan ZHOU1,Jianzong CAO2,Qi LIU1,Wentong CHEN2,Shuaijun FAN1,Yakun YAO2,Chenyu LIN1,Caini MA1   

  1. 1.Department of Environmental Science and Engineering, North China Electric Power University (Baoding), Baoding 071003, Hebei, China
    2.Shenzhen Energy Baoding Power Co. , Ltd. , Baoding 072150, Hebei, China
  • Received:2020-02-17 Revised:2020-03-13 Online:2020-08-05 Published:2020-08-05
  • Contact: Shuangchen MA

湿法脱硫系统动态过程建模与仿真

马双忱1(),周权1,曹建宗2,刘琦1,陈文通2,樊帅军1,要亚坤2,林宸雨1,马彩妮1   

  1. 1.华北电力大学(保定)环境科学与工程系,河北 保定 071003
    2.深能保定发电有限公司,河北 保定 072150
  • 通讯作者: 马双忱
  • 作者简介:马双忱(1968—),男,博士,教授,msc1225@163.com

Abstract:

The chemical mechanism model of the desulfurization tower in limestone-gypsum flue gas desulfurization was established, and the chemical process of flue gas desulfurization in the tower was dynamically simulated. Based on the material balance and chemical balance in the desulfurization tower, the model is described as a differential equation and solved by the special calculation software. Based on the actual operation data of the desulfurization system of a power plant, the changes of various indexes of the desulfurization system, such as pH, desulfurization rate, etc., and the axial spatial distributions of some important chemical substances, such as H +, SO2, are predicted. According to the calculation results, the influence of pH on the desulfurization rate is analyzed, and the boundary conditions of the operating parameters are explored and found. The results of this study put forward optimization suggestions for the design and operation of the actual desulfurization tower, and strengthen the anticorrosive performance at the flue gas inlet. The pH of the power plant slurry should be controlled at 4.2—5.3.

Key words: wet flue gas desulfurization, kinetic modeling, mathematical modeling, dynamic simulation, model correction

摘要:

针对石灰石-石膏法烟气脱硫建立脱硫塔的化学机理模型,对塔内烟气脱硫的化学过程进行动态模拟与仿真。基于脱硫塔内物料平衡和化学平衡,将模型描述为微分方程,并通过计算软件求解。基于某电厂脱硫系统实际运行数据,预测一定时间内脱硫系统各项指标的变化,如pH、脱硫率等,以及一些重要化学物质的轴向空间分布情况,如H+、SO2。根据计算结果,分析pH对脱硫率的影响规律,探究和寻找运行参数的边界条件。研究结果对实际脱硫塔的设计和运行提出了优化建议,比如在烟气入口处加强防腐措施,控制浆液pH在4.2~5.3。

关键词: 湿法烟气脱硫, 动力学模型, 数学模拟, 动态仿真, 模型修正

CLC Number: