초록 ▼

A method is disclosed of making an on-line gas analysis of a multicomponent gas emission flow by (a) continuously sequestering a sample flow from the gas emission flow, which sample flow may be filtered to substantially eliminate solid or liquid particles, diluted to lower its dew point to below roo

A method is disclosed of making an on-line gas analysis of a multicomponent gas emission flow by (a) continuously sequestering a sample flow from the gas emission flow, which sample flow may be filtered to substantially eliminate solid or liquid particles, diluted to lower its dew point to below room temperature, and changed in either temperature and/or pressure to be substantially the same in temperature and pressure as that of gases used to create reference transmission frequency spectral data employed in step (d); (b) continuously irradiating the sample flow with an electromagnetic radiation beam while modulating the amplitude of infrared frequencies in the audio frequency range of the beam, either prior to or immediately subsequent to irradiation of the sample flow, to produce electromagnetic signals having discernible amplitude variations resulting from spectral interference patterns; (c) detecting and collecting the signals at a sufficiently high rate to substantially completely distinguish between adjacent spectral pattern amplitude peaks without mutual spectral interference and to permit analysis of the signals in real time; and (d) analyzing the signals in real time by (i) mathematically manipulating the signals in accordance with Beer\s Law to create reformed background-corrected data, and (ii) applying reference transmission frequency spectral data to the reformed data for each suspected gaseous component to give a linear quantitative measure of the presence of each and every suspected gas component in the gas emission flow.

대표청구항 ▼

An on-line gas measurement apparatus, comprising: (a) dilution tube means for sequestering a sample flow from a gas emission flow, said sample flow being diluted to lower its dew point to below room temperature and changed in either temperature and/or pressure to be substantially the same in tempera

An on-line gas measurement apparatus, comprising: (a) dilution tube means for sequestering a sample flow from a gas emission flow, said sample flow being diluted to lower its dew point to below room temperature and changed in either temperature and/or pressure to be substantially the same in temperature and pressure as that of gases used to create reference transmission frequency spectral data; (b) FTIR apparatus effective to Produce electromagnetic signals with discernible amplitude variations resulting from irradiating said sample flow; (c) computer means for (i) detecting and collecting said signals at a sufficiently high rate to substantially completely distinguish between adjacent spectral amplitudes without mutual spectral interference, and (ii) analyzing said signals in accordance with Beer\s Law to create reformed background-corrected data and applying reference transmission frequency spectral data to said reformed data for each suspected gas component to give a linear quantitative measure of the presence of each and every suspected gas component in said gas emission flow.