一、问题的提出随着城市煤气事业的发展和燃料构成的变化,煤气种类也在变化。除了煤制气外,还广泛应用天然气、液化石油气和油制气等。这些煤气的性质往往是不同的。为了使燃烧器具能适用于不同品种的煤气,或者如何混配煤气使之适应已有的燃具,均需了解煤气的互换性。 First, the issue raised With the development of the city’s gas business and changes in the composition of fuel, the type of gas is also changing. In addition to coal gas, natural gas, liquefied petroleum gas, and oil gas are widely used. The nature of these gases is often different. In order to make the burning appliance adaptable to different types of gas, or how to mix the gas to adapt it to the existing gas appliance, it is necessary to understand the interchangeability of the gas.