| abstract |
The invention provides an on-line pretreatment device of a chromatographic gas sample, and the device is mainly used for on-line pretreatment of gas samples of an ethylene cracking furnace. The pretreatment device is a box structure, and is mounted between an outlet of an online analysis sampler of the ethylene cracking furnace and an on-line chromatogram. The on-line pretreatment device is mainly composed of a buffer sedimentation tank, a visual liquid-discharge tank, a gas filter, a pressure regulating valve, a cleaning transfer valve, a steam system and insulating parts. Inner surfaces of the connecting pipelines use ultramicro nanostructures with a low surface tension. The chromatographic gas sample can be treated to remove water, solid impurities and heavy hydrocarbon droplets, and outputted to the on-line chromatogram with a stable flow. |