Multi-component gas analysis system and multi-component gas analysis method

Patent metadata

Field	Value
Publication number	US-2016349176-A1
Application number	US-201615161359-A
Country	US
Kind code	A1
Filing date	May 23, 2016
Priority date	May 25, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A multi-component gas analysis system includes a spectrometric analysis device configured to obtain ratio of each of first components in a multi-component gas based on an absorption spectrum of light that has transmitted through the multi-component gas; a density measurement device configured to measure a first density of the multi-component gas; and a calculation device configured to calculate a ratio of each of second components in the multi-component gas using the ratio of each of the first components obtained by the spectrometric analysis device and the first density measured by the density measurement device, the second components being components that cannot be obtained by the spectrometric analysis device.

First claim

What is claimed is:

1 . A multi-component gas analysis system comprising:
a spectrometric analysis device configured to obtain ratio of each of first components in a multi-component gas based on an absorption spectrum of light that has transmitted through the multi-component gas; a density measurement device configured to measure a first density of the multi-component gas; and a calculation device configured to calculate a ratio of each of second components in the multi-component gas using the ratio of each of the first components obtained by the spectrometric analysis device and the first density measured by the density measurement device, the second components being components that cannot be obtained by the spectrometric analysis device.

2 . The multi-component gas analysis system according to claim 1 , wherein
the calculation device is configured to calculate a second density of the multi-component gas using the ratio of each of the first components obtained by the spectrometric analysis device, and the calculation device is configured to calculate the ratio of each of the second components by comparing the second density with the first density.

3 . The multi-component gas analysis system according to claim 1 , further comprising:
a pressure measurement device configured to measure a pressure of the multi-component gas; and a temperature measurement device configured to measure a temperature of the multi-component gas, wherein the calculation device is configured to calculate the ratio of each of the second components using the pressure of the multi-component gas measured by the pressure measurement device and the temperature of the multi-component gas measured by the temperature measurement device, in addition to the ratio of each of the first components obtained by the spectrometric analysis device and the first density measured by the density measurement device.

4 . The multi-component gas analysis system according to claim 1 , wherein the spectrometric analysis device is a Fourier transform infrared spectrometric analysis meter, a near-infrared spectrometric analysis meter, a laser gas analysis meter, or a Raman spectrometer.

5 . The multi-component gas analysis system according to claim 1 , wherein the density measurement device is a gas densimeter or a mass flowmeter.

6 . The multi-component gas analysis system according to claim 1 , wherein the first components are components that absorb infrared light, and the second components are components that do not absorb the infrared light.

7 . A multi-component gas analysis method comprising:
a first step of acquiring, by a spectrometric analysis device, ratio of each of first components in a multi-component gas based on an absorption spectrum of light that has transmitted through the multi-component gas; a second step of measuring, by a density measurement device, a first density of the multi-component gas; and a third step of calculating ratio of each of second components in the multi-component gas using the ratio of each of the first components obtained in the first step and the first density measured in the second step, the second components being components that cannot be obtained by the spectrometric analysis device.

8 . The multi-component gas analysis method according to claim 7 , wherein the third step comprises:
calculating a second density of the multi-component gas using the ratio of each of the first components obtained in the first step, and comparing the second density with the first density.

9 . The multi-component gas analysis method according to claim 7 , further comprising:
measuring a pressure of the multi-component gas; and measuring a temperature of the multi-component gas, wherein in the third step, the ratio of each of the second components is calculated using the pressure of the multi-component gas that has been measured and the temperature of the multi-component gas that has been measured, in addition to the ratio of each of the first components obtained in the first step and the first density measured in the second step.

10 . The multi-component gas analysis method according to claim 7 , wherein the spectrometric analysis device is a Fourier transform infrared spectrometric analysis meter, a near-infrared spectrometric analysis meter, a laser gas analysis meter, or a Raman spectrometer.

11 . The multi-component gas analysis method according to claim 7 , wherein the density measurement device is a gas densimeter or a mass flowmeter.

12 . The multi-component gas analysis method according to claim 7 , wherein the first components are components that absorb infrared light, and the second components are components that do not absorb the infrared light.

Assignees

• Yokogawa Electric Corp

Inventors

• Takezawa Shigeru
• Yahagi Takuya
• Hidaka Yoshihisa

Classifications

• G01N21/3504 Primary

  for analysing gases, e.g. multi-gas analysis · CPC title

• G01N33/225

  Gaseous fuels, e.g. natural gas · CPC title

• G01N33/0062

  concerning the measuring method or the display, e.g. intermittent measurement or digital display · CPC title

• G01N2201/12

  Circuits of general importance; Signal processing · CPC title

• F23K5/002

  Gaseous fuel · CPC title