The exhaust gas from a rotary kiln hazardous waste incinerator must be cooled from 1200 °C to 300 °C before entering a spray dryer for acid gas removal. The engineer in charge of this project investigated several alternatives to cool the exhaust gas and hes concluded that the two most practical solutions would be either the installation of a waste heat boiler or the installation of a spray injection system in which water is sprayed directly into the exhanst duct upstream of the spray dryer. Based on the following data, which option should be selected? Waste Heat Boiler Cost installed Service life $2 million 10 years $0.4 million/yr $0.4 million/yr Operating cost excluding depreciation Generated steam value Water Injection System Cost installed Service life Operating cost excluding depreciation Note: The additional water vapor added to the exhaust gas will increase the size of the spray dryer by 50%. The original spray dryer cost was estimated to be $1.0 million with a service life of 10 years. $0.5 million 5 уears $0.15 million/yr

The exhaust gas from a rotary kiln hazardous waste incinerator must be cooled from 1200 °C to 300 °C before entering a spray dryer for acid gas removal. The engineer in charge of this project investigated several alternatives to cool the exhaust gas and hes concluded that the two most practical solutions would be either the installation of a waste heat boiler or the installation of a spray injection system in which water is sprayed directly into the exhanst duct upstream of the spray dryer. Based on the following data, which option should be selected? Waste Heat Boiler Cost installed Service life $2 million 10 years $0.4 million/yr $0.4 million/yr Operating cost excluding depreciation Generated steam value Water Injection System Cost installed Service life Operating cost excluding depreciation Note: The additional water vapor added to the exhaust gas will increase the size of the spray dryer by 50%. The original spray dryer cost was estimated to be $1.0 million with a service life of 10 years. $0.5 million 5 уears $0.15 million/yr

Cornerstones of Cost Management (Cornerstones Series)

4th Edition

ISBN:9781305970663

Author:Don R. Hansen, Maryanne M. Mowen

Publisher:Don R. Hansen, Maryanne M. Mowen

Chapter14: Quality And Environmental Cost Management

Section: Chapter Questions

Problem 5CE: Verde Company reported operating costs of 50,000,000 as of December 31, 20x5, with the following...

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