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垃圾焚烧炉的运行过程受到众多因素的影响,焚烧过程的不稳定将导致产生大量新的有害物质,为了确保垃圾的清洁燃烧需要将整个炉膛的温度控制在一定范围之内。该文针对循环流化床垃圾焚烧炉,取炉膛上部和下部两个温度变量作为被控量,采用多变量内模控制的策略,实现了输出变量之间的解耦,保证了全炉膛温度的稳定。文中给出了控制器的设计过程,并分析了控制器稳定的条件。对所设计的多变量内模控制器进行了仿真验证,仿真结果表明所采用的控制策略是有效的。
The operation of the waste incinerator is affected by many factors. The instability of the incineration process will result in a large amount of new harmful substances. To ensure the clean burning of the garbage, the temperature of the entire furnace needs to be controlled within a certain range. In this paper, the circulating fluidized bed wastes incinerator, take the upper and lower furnace temperature as the controlled variable, the use of multivariable internal control strategy to achieve decoupling between the output variables to ensure the full furnace temperature stable. The design process of the controller is given in this paper, and the condition of the controller stability is analyzed. The multivariable internal model controller is verified by simulation. The simulation results show that the control strategy adopted is effective.