The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2020
Filed:
Jun. 09, 2016
Riken Keiki Co., Ltd., Tokyo, JP;
Tomoo Ishiguro, Kasukabe, JP;
Kenichi Kojima, Kasukabe, JP;
RIKEN KEIKI CO., LTD., Tokyo, JP;
Abstract
It is an object of the present invention to provide a calorific value measuring device and a calorific value measuring method which enable highly reliable measurement of the calorific value of a by-product gas produced in a steelmaking process. In the present invention, with a by-product gas produced in a steelmaking process being employed as an object gas of which calorific value is to be measured, the refractive index and the sonic speed of the by-product gas are measured so as to compute a refractive index equivalent calorific value Qfrom the value of the refractive index as well as a sonic speed equivalent calorific value Qfrom the value of the sonic speed. On the basis of the concentration Xof carbon monoxide gas contained in the by-product gas, an error calorific value Qis computed by Equation (1) below using a value selected within a range of −0.08 to −0.03 as a calorific value equivalent coefficient ζ. On the basis of the refractive index equivalent calorific value Q, the sonic speed equivalent calorific value Qand the error calorific value Qwhich have been computed, the calorific value Q of the by-product gas is determined by Equation (2) below using a value selected within a range of 1.1 to 4.2 as a correction factor α.