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对工业氮去除工艺系统优化模型预测控制器的设计和应用等方面进行论述.脱氮处理的主要作用是使氮的去除率达到污水排放标准.过程由尿素分解反应(urea+H2O 2NH3+CO2)和汽提塔组成.从控制的角度看,被考察的工厂除了液位和强压力操作系统外,至少有4×4个温控装置,整个系统具有多变量和高非线性特征.应用PID控制器可造成工作效率低下,制约氮分离的程度并造成蒸汽的过度损耗.为解决这个问题,用适配控制器软件包对工艺过程模型的预测控制进行评估.尽管不知道进料的组成分布,仍可通过控制塔内的温度分布保证蒸汽损耗量最小,同时保证含氮废水满足最终排放浓度的要求.
The design and application of the predictive controller for optimization of industrial nitrogen removal process system are discussed.The main role of denitrification is to make the nitrogen removal rate reach the standard of wastewater discharge.Urea decomposition (urea + H2O 2NH3 + CO2) And the stripping tower.From the control point of view, the factory under inspection has at least 4 × 4 temperature control devices besides the liquid level and the strong pressure operating system, and the whole system has the characteristics of multivariable and high nonlinearity.Application of PID control In order to solve this problem, an adaptive controller package is used to evaluate the predictive control of the process model.Although we do not know the composition of the feed, The temperature loss in the control tower can still be guaranteed to minimize the amount of steam loss while ensuring that the nitrogen-containing wastewater meets the final concentration requirements.