基于自适应寻优锅炉一次风宽负荷先进控制的研究与应用

针对现有的一次风运行控制逻辑下存在磨煤机冷热风门动作相互干扰严重、磨煤机运行工况不稳定、电耗不可控等问题,本文研究了基于自适应寻优锅炉一次风宽负荷先进控制系统。该系统可通过在锅炉DCS系统一次风压控制器中增加新的控制策略,实现动态自适应锅炉一次风控制,在保证磨煤机通风量及风速一定的条件下,最大限度地降低一次风机电耗,提高一次风系统的自动调节品质和锅炉效率。

制曲发酵床气流分布均匀性的试验研究

为了提高制曲发酵床气流分布的均匀性。运用二次通用旋转组合试验设计方法,对影响气流分布均匀性的主要工作参数冷风开度、热风开度、曲料厚度和导风板角度等进行试验验证,获得了曲料通风层的气流分布规律,具有较强的实践指导意义。

基于PID控制器的磨煤机进料控制单元设计

磨煤机的工作性能与进料配比关系密切。针对原煤在水分、灰分、挥发分和可磨性方面的特征差异,设计了基于模糊控制理论的磨煤机进料控制单元。通过应用模糊控制理论,对PID控制参数进行优化,实现了磨煤机工作过程的自动调节,提高了磨煤机的工作性能。文章重点阐述了模糊控制器的设计和PID参数的优化过程。

Development and Introduction of Monitoring System of Refractory Lining Wear in Blast Furnace Hearth

To diagnose the lining condition of the blast furnace hearth during its campaign, are widely used methods based on the analysis of the temperature characteristics of the refractory lining. Measurement of the temperature characteristics is performed by means of a few hundred thermocouples placed inside the refractory lining. The peculiarity of proposed and used mathematical models is a fully three-dimensional assessment of the refractory lining, presence mechanisms of adaptation to the actual thermal conductivity of refractories and optimization calculations to the work in the on-line mode. The new monitoring systems of the lining wear of the blast furnace hearth are established on 5 blast furnaces of integrated iron-and-steel works of China： No.4 by volume 3,200 m3 of “Jinan Iron ＆ Steel Company” in Jinan （683 thermocouples）, No.2 by volume 1,080 m3 of “Henan Jiyuan Iron ＆ Steel （Group） Company” in Jiyuan （212 thermocouples）, No.4 by volume 2,500 m3 of “Guangxi Liuzhou Iron ＆ Steel （Group） Company” in Liuzhou （383 thermocouples）, No.3 by volume 1,750 m3 of “Jinan Iron ＆ Steel Company” in Jinan （524 thermocouples）; No.1 by volume 1,750 m3 of “Jinan Iron ＆ Steel Company” in Jinan （524 thermocouples）.