A multi-flow-path process gas
online analysis and pretreatment device. Two-position three-way valves (102, 202, 302, 402, 502, 602) are used for switching flow directions of gases, and switching between communication of a total
exhaust pipe (01) and gas inlet paths (1, 2, 3, 4, 5, 6) and communication of a total sample detection gas path and the gas inlet paths (1, 2, 3, 4, 5, 6); according to different requirements, a multi-way switching valve (02) is used for switching between different gas inlet paths (1, 2, 3, 4, 5, 6) and the total sample detection gas path for communication; a first-stage pressure reducing valve (03) is used for regulating the pressure of sample gases to be detected and reduce the pressure of a gas having a pressure higher than a preset value; an
impurity filter (04) is used for removing mechanical impurities from the gases to be detected; a second-stage pressure reducing valve (05) is used for performing secondary pressure regulation on the gas decompressed by the first-stage pressure reducing valve (03); and a three-way filter (06) is used for removing mechanical impurities,
water vapor and oil hydrocarbons from the gases to be detected, and preventing the impurities from entering a key apparatus or element. The multi-flow-path process gas
online analysis and pretreatment device effectively improves the timeliness of
monitoring data, reduces errors generated in manual sampling, transportation and analysis processes, and achieves timely and reliable
data analysis, thereby reducing the
gas analysis cost in processes, and improving the efficiency.