Patent ID: 6050656
Filing Date: 2000-04-18
Classification: G01N

Abstract:
A pollutant emissions monitoring system for stack gases passing through a stack having a pair of diametrically opposed stack penetrations said system comprising:an entirely optical-based emission monitor mounted on the stack for measuring opacity and flow rate of gas passing through the stack, said emission monitor comprising:a first assembly for generating optical signals having an opacity monitor and a light beam assembly, said first assembly positionable in one of the stack penetrations, said first assembly having means for encoding the generated optical signals; anda second assembly for monitoring flow rate, said second assembly positionable across from said first assembly and in the opposing stack penetration, said second assembly having means for decoding the encoded optical signals from said first assembly;a fiber optic cable connected to said emission monitor for conducting optical data; anda remote data processor optically connected to said emission monitor by said fiber optic cable for receiving optical data from said emission monitor, said remote data processor determining the opacity and the flow rate of gas passing through the stack based on the encoded and decoded optical signals from said first assembly and said second assembly;wherein said remote data processor determines the weight of fly ash in the stack gases based on the opacity and the flow rate.