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

FINANCIAL ACCOUNTING

10th Edition

ISBN:9781259964947

Author:Libby

Publisher:Libby

Chapter1: Financial Statements And Business Decisions

Section: Chapter Questions

Problem 1Q

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