论文部分内容阅读
一般沥青混合料搅拌站的燃气燃烧机火焰调节是由伺服连杆机构带动鼓风风门、燃气阀门联动实现(暂且将其称为常规燃气机),通过同步改变风门与气阀开度控制火焰强度。由于风门和气阀的开度与空气及燃气的流量呈非线性关系且无法量化,因此不仅调节繁琐,而且空燃比(空气与燃气之比)的控制精度也不高,一般操作人员很难掌控。此外,此种方式要求气源压力十分稳定,否则气压的波动会造成空燃比的改变。由于国内很多用户的气源是高压或液化天然气,气罐切换或多台机共同运行时气压经常会出现较大波动,即便是管道供
General asphalt mixing plant gas burner flame control is driven by the servo rod linkage blast door, gas valve linkage (for the time being referred to as the conventional gas engine), by changing the damper and valve opening simultaneously control the flame strength . Since the degree of opening of the damper and the air valve is non-linear with respect to the flow of the air and the gas, it is not only tedious to adjust, but also the control accuracy of the air-fuel ratio (air-fuel ratio) is not high and is generally difficult for the operator to handle. In addition, this approach requires a very stable gas pressure, or pressure fluctuations will result in changes in air-fuel ratio. Because many domestic users of the gas source is high pressure or liquefied natural gas, gas tank switching or more machines operating pressure often appear greater volatility, even if the pipeline for