초록 ▼

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 dete

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.

대표청구항 ▼

An apparatus for controlling a starting operation of a boiler, the apparatus comprising: a super heater means and a steam separator means; a first valve means for bypassing steam of said super heater means; a second valve means for bypassing steam from said super heater means to a portion other than

An apparatus for controlling a starting operation of a boiler, the apparatus comprising: a super heater means and a steam separator means; a first valve means for bypassing steam of said super heater means; a second valve means for bypassing steam from said super heater means to a portion other than a primary supply portion to be supplied with steam from said super heater means; a third valve means for regulating a fuel flow to be supplied to a burner means; a temperature detecting means for detecting a pressure of steam at a predetermined portion of the boiler; pressure detecting means for detecting a pressure of steam in the boiler; first arithmetic means for calculating a desired steam temperature change rate value represented by a preset constant or function of a signal with respect to thermal stress of a super heater outlet header and a desired steam pressure change rate value which is given by a preset constant or function of a signal representing thermal stress of said steam separator which are required for suppressing stresses to be generated in predetermined structural portions of the boiler, on the basis of said steam temperature, said steam pressure, a desired pressure increase value, and a desired temperature increase value; and second arithmetic means for calculating manipulated variables of said first valve means, said second valve means and said third valve means, respectively, in dependence upon said steam temperature, said steam pressure, said desired steam temperature change rate value and said desired steam pressure change rate value obtained by said first arithmetic means.