为使小型直流锅炉稳定运行，依托某试验项目，设计一套高参数小型燃气直流锅炉控制系统。该系统以TIA博途软件为控制平台，通过分析锅炉给水量及锅炉中间点温度两者之间的关系，建立给水量最终到达锅炉中间点温度的控制模型，利用Simulink仿真软件进行辅助设计，最终投入应用实践。结果表明：此套控制系统的有效性、可靠性达到了小型高参数直流锅炉的设计要求(负荷6 t/h、压力5 MPa、温度400 ℃)，具有在同类系直流锅炉系统中借鉴推广的价值。

In order to ensure the stable operation of small once through boiler, depending on a certain experimental project, the control system of a high parameter small gasfired oncethrough boiler was designed. This system took TIA portal software as the control platform, by analyzing the relationship between boiler water supply and boiler midpoint temperature, established a control model for the feed water flow to the midpoint temperature of the boiler.Simulink simulation software was used for auxiliary design and finally put into application practice. The results show that the effectiveness and reliability of this control system meet the design requirements of small high parameter oncethrough boilers with load of 6 t/h, pressure of 5 MPa and temperature of 400 ℃, and it has the value of reference and promotion in similar once through boiler systems.

TK323