为克服纸机干燥部烘缸传热过程中的大惯性，稳定烘缸干燥曲线，设计了以干空气进风量控 制作为主回路、以烘缸蒸汽压控制作为副回路，并引入前馈控制的阀位控制系统。探讨了采用排风 循环风量稳定气罩进风湿度、排风机排风量稳定零位及排风露点限制新的控制方案。结果表明：与 采用传统烘缸蒸汽压控制纸幅水分的控制系统相比，引入前馈控制的阀位控制系统，能快速稳定纸 幅水分；干扰对气罩排风露点的影响很小，排风露点设计值可取其最优化值；利用干空气进风量控 制的快速性和前馈控制的及时性，可使成纸水分波动很小，通过优化纸机质量控制系统中成纸干度 设定值可有效节约蒸汽与水资源的用量。
Abstract
In order to overcome the large inertia of moisture control and stabilize the drying curve in paper machine dryer section, valve position control system was studied with dry air intake control as the mainloop, dryer vapor pressure control as the sub loop together with feedforward control. And further, a new control strategy was established in which hood supply air moisture and zerolevel were respectively controlled by circulating load of exhaust air and exhaust rate of fan and dew point was controlled under the upper constraint. The results show that in comparation of conventional sheet moisture control system using the cylinder vapor pressure, the valve position control system with feedforward control can stable sheet moisture fast. The influence of disturbance to exhaust air dew point is so low that its optimal value can be used for system design. The rapidity of dry air intake control and timeliness of feedforward control make moisture fluctuation in sheet so small that the amount of steam and water resources can be effectively saved by optimizing the dryness setting in the quality control system of paper machine.
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基金
收稿日期：2009-10-25修回日期：2009-12-28基金项目：江苏省高校自然科 学重大基础研究项目(08KJA530003)作者简介：姚新跃(1985—)，硕士生。*张辉(通信作者)，教授 。Email: hgzh@njfu.edu.cn。引文格式：姚新跃，张辉，胡慕伊. 纸机干燥部纸幅水分控制系统 优化方案的分析[J]. 南京林业大学学报:自然科学版,2010,34(4):52-56.
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