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:
Jan. 20, 1987
Filed:
Jul. 15, 1985
Yukio Fukayama, Hiroshima, JP;
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for controlling a starting operation of a boiler which comprises a super heater, a super heater bypass valve, a turbine bypass valve and a fuel flow rate regulating valve. A temperature detector detects a temperature of the steam at a predetermined portion of the boiler. A pressure detector detect a pressure of the steam at the predetermined portion of the boiler. A desired change rate arithmetic unit calculates a desired steam temperature change rate value and a desired steam pressure change rate value on the basis of the steam pressure, the steam temperature, a desired pressure increase value, a desired temperature increase value, a saturated temperature change rate limit and a temperature increase change rate limit. An optimum operation arithmetic unit calculates opening degrees of the super heater bypassing valve, turbine bypass bypass valve and the fuel flow rate regulating valve, respectively, on the basis of the steam temperature, the steam pressure, the desired steam pressure change rate value and the desired steam temperature change rate value obtained by the desired change rate arithmetic unit. A compensation arithmetic unit compensates for the respective opening degrees obtained by the optimum operation arithmetic unit, on the basis of the change rates of the steam temperature and pressure.