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A 1000 MW coal-burning power plant is burning West Virginia bituminous coal with 8% ash content. The power plant is 33% efficient, with 35% of the ash settling out in the firing chamber as bottom ash. A simplified schematic diagram is shown below. Assume 3.5 kWh per pound of coal. (a) Draw an energy diagram for the facility and calculate the rate of heat emitted to the environment in kJ/s; (b) Determine the rate of coal input to the furnace in kg/day; and (c) Assuming that the electrostatic precipitator (ESP) is 99% efficient, calculate the rate of fly ash emitted to the atmosphere in kg/day. Coal Furnace Bottom ash Gases and fly ash ESP Fly ash Exit gases and fly ash Stack

A 1000 MW coal-burning power plant is burning West Virginia bituminous coal with 8% ash content. The power plant is 33% efficient, with 35% of the ash settling out in the firing chamber as bottom ash. A simplified schematic diagram is shown below. Assume 3.5 kWh per pound of coal. (a) Draw an energy diagram for the facility and calculate the rate of heat emitted to the environment in kJ/s; (b) Determine the rate of coal input to the furnace in kg/day; and (c) Assuming that the electrostatic precipitator (ESP) is 99% efficient, calculate the rate of fly ash emitted to the atmosphere in kg/day. Coal Furnace Bottom ash Gases and fly ash ESP Fly ash Exit gases and fly ash Stack

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Problem 6.11** A 1000 MW coal-burning power plant is burning West Virginia bituminous coal with 8% ash content. The power plant is 33% efficient, with 35% of the ash settling out in the firing chamber as bottom ash. A simplified schematic diagram is shown below. Assume 3.5 kWh per pound of coal. (a) Draw an energy diagram for the facility and calculate the rate of heat emitted to the environment in kJ/s; (b) Determine the rate of coal input to the furnace in kg/day; (c) Assuming that the electrostatic precipitator (ESP) is 99% efficient, calculate the rate of fly ash emitted to the atmosphere in kg/day. **Diagram Explanation:** - The diagram illustrates the process flow in a coal-burning power plant. - **Furnace:** Coal enters the furnace where it burns, producing gases and fly ash, as well as bottom ash which settles from the firing chamber. - **ESP (Electrostatic Precipitator):** The gases and fly ash are directed to the ESP, which removes the fly ash effectively. - **Stack:** The exit gases and any remaining fly ash are released through the stack into the atmosphere. The schematic also shows the coal entering the furnace and the pathways of both bottom ash and fly ash, culminating in the release of exit gases through the stack. The ESP helps in significantly reducing fly ash emissions, given its 99% efficiency.
Transcribed Image Text:**Problem 6.11** A 1000 MW coal-burning power plant is burning West Virginia bituminous coal with 8% ash content. The power plant is 33% efficient, with 35% of the ash settling out in the firing chamber as bottom ash. A simplified schematic diagram is shown below. Assume 3.5 kWh per pound of coal. (a) Draw an energy diagram for the facility and calculate the rate of heat emitted to the environment in kJ/s; (b) Determine the rate of coal input to the furnace in kg/day; (c) Assuming that the electrostatic precipitator (ESP) is 99% efficient, calculate the rate of fly ash emitted to the atmosphere in kg/day. **Diagram Explanation:** - The diagram illustrates the process flow in a coal-burning power plant. - **Furnace:** Coal enters the furnace where it burns, producing gases and fly ash, as well as bottom ash which settles from the firing chamber. - **ESP (Electrostatic Precipitator):** The gases and fly ash are directed to the ESP, which removes the fly ash effectively. - **Stack:** The exit gases and any remaining fly ash are released through the stack into the atmosphere. The schematic also shows the coal entering the furnace and the pathways of both bottom ash and fly ash, culminating in the release of exit gases through the stack. The ESP helps in significantly reducing fly ash emissions, given its 99% efficiency.
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