Fiber optic methane monitor based TDLAS and its application in VAM Oxidiser system

摘要

Fiber optic methane monitor based tunable diode laser absorption spectroscope technology (TDLAS) is demonstrated, which is developed for remotely monitoring the concentration of Methane gas at multiple locations. A DFB LD light source of 1665nm is the key unit in the system.A microprocessor is used to control the driver of DFB LD and Acquire data.To realize high precision measure of CH4,we use a reference cell. The instrument achived long time precision of 0.05%(for 0～4% full scale range) and 0.5%(for 0～100% full scale range).The instruments has been used to monitor the mathane of a VAM Oxidiser unit in methane power generation in a long time .The results of measurement are shown and discussed in this paper.