Question 476Steam Plants - Assistant Engineer70% to pass
One factor for determining the minimum feed water inlet temperature to a boiler economizer is the _______________.
AI Explanation
The correct answer is D) dew point temperature of the stack gases.
The dew point temperature of the stack gases is a key factor in determining the minimum feed water inlet temperature to a boiler economizer. This is because the economizer is designed to extract heat from the exhaust gases before they are vented, and the feed water inlet temperature must be kept above the dew point to prevent condensation and potential corrosion in the economizer.
The other options, such as desuperheater outlet temperature, steam bled off the LP turbine, and superheater inlet temperature, are not directly related to the minimum feed water inlet temperature required for the economizer to function effectively.
Related Questions
#474 Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on an auxiliary boiler, are _______________.#475 During unsafe firing conditions in a large automatic auxiliary boiler, various control actuators are interlocked with the burner circuit to prevent start-up, in addition to safety shutdown. These controls are referred to as _______________.#477 If there is a sudden drop in the outlet temperature of an uncontrolled superheater, you should _______________.#478 To safely decrease the boiler firing rate, you should always reduce the fuel pressure _______________.#479 As the percentage of CO2 in the stack gas decreases, you can assume that _______________.