VALUE of coal = 26 MJ/kg⇒ Mass flow rate of fuel supplied = 43.75/26 = 1.6827 kg/s;GIVEN coal has sulphur content of 3.6 %⇒ Mass flow rate of sulphur = 1.6827 × 0.036 = 0.0605 kg/s;Moles of sulphur = 0.0605/32 = 1.89 × 10-3 kmol/s;A particular limestone to be FED to it at a calcium-sulphur molar ratio of 3.0Moles of calcium (CaCO3) required = 3 × 1.89 × 10-3 kmol/s = 5.679 × 10-3 kmol/s;Mass of CaCO3 required = 0.5679 kg/s;Mass of limestone required = 0.5679/0.85 = 0.668 kg/s = 2405 kg/hr;

"> VALUE of coal = 26 MJ/kg⇒ Mass flow rate of fuel supplied = 43.75/26 = 1.6827 kg/s;GIVEN coal has sulphur content of 3.6 %⇒ Mass flow rate of sulphur = 1.6827 × 0.036 = 0.0605 kg/s;Moles of sulphur = 0.0605/32 = 1.89 × 10-3 kmol/s;A particular limestone to be FED to it at a calcium-sulphur molar ratio of 3.0Moles of calcium (CaCO3) required = 3 × 1.89 × 10-3 kmol/s = 5.679 × 10-3 kmol/s;Mass of CaCO3 required = 0.5679 kg/s;Mass of limestone required = 0.5679/0.85 = 0.668 kg/s = 2405 kg/hr;

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A fluidized bed combustion system having an output of 35 MW at 80% efficiency when using a coal of heating value 26 MJ/kg with a sulphur content of 3.6% requires a particular limestone to be fed to it at a calcium-sulphur molar ratio of 3.0 so as to limit emissions of SO2 adequately. The limestone used contains 85% CaCO3. The required flow rate of limestone will be

Power Engineering Gas And Vapor Power Cycles in Power Engineering 8 months ago

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Calculation:GivenOutput = 35 MW; η = 80%⇒ Heat supplied = 35/0.80 = 43.75 MW;Heating VALUE of coal = 26 MJ/kg⇒ Mass flow rate of fuel supplied = 43.75/26 = 1.6827 kg/s;GIVEN coal has sulphur content of 3.6 %⇒ Mass flow rate of sulphur = 1.6827 × 0.036 = 0.0605 kg/s;Moles of sulphur = 0.0605/32 = 1.89 × 10-3 kmol/s;A particular limestone to be FED to it at a calcium-sulphur molar ratio of 3.0Moles of calcium (CaCO3) required = 3 × 1.89 × 10-3 kmol/s = 5.679 × 10-3 kmol/s;Mass of CaCO3 required = 0.5679 kg/s;Mass of limestone required = 0.5679/0.85 = 0.668 kg/s = 2405 kg/hr;

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Posted on 09 Nov 2024, this text provides information on Power Engineering related to Gas And Vapor Power Cycles in Power Engineering. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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