... , it will produce a large amount of unliquefied gas-CH4& C4H8 , which cant be formed at normal temperature, normal pressure. If ... In our process, it is transferred first through a water close device and a safety device- burning air muzzle. Before burning, we should ensure ... , it will produce a large amount of unliquefied gas-CH4& C4H8 , which cant be formed at normal temperature, normal pressure. If ...