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:
Jul. 05, 2016
Filed:
Apr. 27, 2011
Yongfeng Liu, Shanghai, CN;
Guoqiang Qian, Shanghai, CN;
Huazhong Gu, Shanghai, CN;
Rong Chen, Shanghai, CN;
Zhicheng Wang, Shanghai, CN;
Chunguo LV, Shanghai, CN;
Dejian Wen, Shanghai, CN;
Peili Zhang, Shanghai, CN;
Yongfeng Liu, Shanghai, CN;
Guoqiang Qian, Shanghai, CN;
Huazhong Gu, Shanghai, CN;
Rong Chen, Shanghai, CN;
Zhicheng Wang, Shanghai, CN;
Chunguo Lv, Shanghai, CN;
Dejian Wen, Shanghai, CN;
Peili Zhang, Shanghai, CN;
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Abstract
A method for controlling furnace temperature of a fired heating furnace is disclosed, comprising: measuring furnace temperatures to obtain furnace temperature feedback values; calculating the differences between furnace temperature setting values and the furnace temperature feedback values as discrepancy values DV, in accordance with the furnace temperature feedback values and the furnace temperature setting value; calculating the differences between the furnace temperature setting values and the furnace temperature feedback values in a unit time, i.e., the gradient of furnace temperature change values, as discrepancy values DV; obtaining a speed V of a fired heater machine set from a speed adjuster of the fired heater machine set, and obtaining a first multiple feed forward output components FFin accordance with the speed V of the machine set (V); obtaining a second multiple feed forward output components FFin accordance with the differences between the furnace temperature setting values and the furnace temperature feedback values, i.e., the discrepancy values DV; looking up a PID control parameter in accordance with the discrepancy values DVand DV, based on fuzzy control rule, and creating an adjusting control parameter OPin accordance with the PID control parameter; controlling a valve for regulating coal gas flow and a valve for regulating air flow by combining the adjusting control parameter OPwith the first multiple feed forward components FFand the second multiple feed forward components FFas a final control output value.