Method of measuring temperature of an object to be measured, dust temperature and dust concentration

Patent metadata

Field	Value
Publication number	US-2020141809-A1
Application number	US-201615758835-A
Country	US
Kind code	A1
Filing date	Aug 30, 2016
Priority date	Sep 16, 2015
Publication date	May 7, 2020
Grant date	—

Abstract

A first radiance meter is directed toward an object to be measured, radiance is measured through a space where dust is present with the use of at least two wavelengths by the first radiance meter, second radiance meters which are equal in number to one or more objects having temperatures different from that of the object to be measured are directed toward the objects, radiances are measured through the space with the use of at least two wavelengths by the second radiance meters respectively, and a temperature of the object to be measured, a temperature of the dust, and concentration of the dust are measured from the radiances measured by the first radiance meter and the second radiance meters.

First claim

1 . A method of measuring a temperature of an object to be measured, a temperature of dust, and concentration of the dust, comprising:
directing a first radiance meter toward the object to be measured and measuring radiance through a space where the dust is present with the use of at least two wavelengths by the first radiance meter; directing second radiance meters, which are equal in number to one or more objects having temperatures different from that of the object to be measured, toward the objects, and measuring radiances through the space with the use of at least two wavelengths by the second radiance meters respectively; and measuring a temperature of the object to be measured, a temperature of the dust, and concentration of the dust from the radiances measured by the first radiance meter and the second radiance meters.

2 . The method according to claim 1 , wherein the objects are blackbody cavities.

3 . The method according to claim 1 , wherein the object to be measured is an object to be heated in a rotary kiln.

4 . The method according to claim 3 , wherein the objects are blackbody cavities.

5 . The method according to claim 3 , wherein the object is a discharge-end metal fitting of a rotary kiln.

6 . The method according to claim 1 , wherein the objects are two objects which are an object having a temperature higher than that of the object to be measured and an object having a temperature lower than the object to be measured.

7 . The method according to claim 6 , wherein the object to be measured is an object to be heated in a rotary kiln, the object having a temperature higher than that of the object to be measured is a flame of a burner, and the object having a temperature lower than that of the object to be measured is a discharge-end metal fitting provided in the rotary kiln.

8 . The method according to claim 1 , wherein measurement wavelengths for radiances are two wavelengths which are a wavelength λ 1 and a wavelength λ 2 , and a numerical product of these wavelengths meets 0.8 or less when they are represented in units of μm.

9 . The method according to claim 1 , wherein measurement wavelengths for radiances are three wavelengths which are a wavelength λ 1 , a wavelength λ 2 , and a wavelength λ 3 , measurement is performed with a combination of two of these wavelengths, and a temperature of the object to be measured, a temperature of the dust, and concentration of the dust are measured from obtained two temperatures of the object to be measured.

10 . The method according to claim 3 , wherein measurement wavelengths for radiances are two wavelengths which are a wavelength λ 1 and a wavelength λ 2 , and a numerical product of these wavelengths meets 0.8 or less when they are represented in units of μm.

11 . The method according to claim 5 , wherein measurement wavelengths for radiances are two wavelengths which are a wavelength λ 1 and a wavelength λ 2 , and a numerical product of these wavelengths meets 0.8 or less when they are represented in units of μm.

12 . The method according to claim 6 , wherein measurement wavelengths for radiances are two wavelengths which are a wavelength λ 1 and a wavelength λ 2 , and a numerical product of these wavelengths meets 0.8 or less when they are represented in units of μm.

13 . The method according to claim 7 , wherein measurement wavelengths for radiances are two wavelengths which are a wavelength λ 1 and a wavelength λ 2 , and a numerical product of these wavelengths meets 0.8 or less when they are represented in units of μm.

14 . The method according to claim 3 , wherein measurement wavelengths for radiances are three wavelengths which are a wavelength λ 1 , a wavelength λ 2 , and a wavelength λ 3 , measurement is performed with a combination of two of these wavelengths, and a temperature of the object to be measured, a temperature of the dust, and concentration of the dust are measured from obtained two temperatures of the object to be measured.

15 . The method according to claim 5 , wherein measurement wavelengths for radiances are three wavelengths which are a wavelength λ 1 a wavelength λ 2 , and a wavelength λ 3 , measurement is performed with a combination of two of these wavelengths, and a temperature of the object to be measured, a temperature of the dust, and concentration of the dust are measured from obtained two temperatures of the object to be measured.

16 . The method according to claim 6 , wherein measurement wavelengths for radiances are three wavelengths which are a wavelength λ 1 , a wavelength λ 2 , and a wavelength λ 3 , measurement is performed with a combination of two of these wavelengths, and a temperature of the object to be measured, a temperature of the dust, and concentration of the dust are measured from obtained two temperatures of the object to be measured.

17 . The method according to claim 7 , wherein measurement wavelengths for radiances are three wavelengths which are a wavelength λ 1 , a wavelength λ 2 , and a wavelength λ 3 , measurement is performed with a combination of two of these wavelengths, and a temperature of the object to be measured, a temperature of the dust, and concentration of the dust are measured from obtained two temperatures of the object to be measured.

Assignees

• Mitsubishi Materials Corp
• Ube Industries
• Sumitomo Osaka Cement Co Ltd
• Taiheiyo Cement Corp

Inventors

• Shima Hirokazu
• Takata Yoshiaki

Classifications

• F27D21/0014

  Devices for monitoring temperature · CPC title

• G01J2005/607

  on two separate detectors · CPC title

• F27D2019/0006

  Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value · CPC title

• F27B7/42

  Arrangement of controlling, monitoring, alarm or like devices · CPC title

• G01J5/0044

  Furnaces, ovens, kilns (G01J5/0007, G01J5/004 take precedence) · CPC title