Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net

Chapter 4EUR/yearWaste gas volume (Nm 3 /hour) 36000Operating time (hour/year) 8400SO 2 concentration of waste gas before emissionreduction (mg/Nm 3 )SO 2 concentration of waste gas after emissionreduction (mg/Nm 3 )1200300Reduction of SO 2 emissions (kg/hour) 32Extra investment costs (EUR) 1090000Repayment on investment incl. interest (EUR/year) 112300Period of depreciation (year) 15Interest rate (%) 6Extra costs of maintenance and wear (EUR/year) 21800Maintenance and wear (% of investment costs) 2Energy consumption extra pressure drop for the 5 thcatalyst layer (mbar)60Extra energy consumption of ventilator (kWh/hour) 92 0.044 EUR/kWh 33700Extra energy consumption of circulating pumps andadditional energy consumers (kWh/hour)42 0.044 EUR/kWh 15500Extra catalyst costs (incl. 6 % interest rate) 8900Extra amount of catalyst for the5 th catalyst layer (m 3 )30Lifetime of catalyst (year) 10Specific costs of catalyst 2180 EUR/m 3Recovered sulphuric acid (kg/hour) 50 0.051 EUR/kg -21200Estimated annual extra costs (EUR/year) 171000Specific costs related to reduction of SO 2 emissions (EUR/tonne SO 2 ) 629Specific extra costs related to the production of H 2 SO 4 (EUR/tonne H 2 SO 4 ) 1.18Basis: inlet concentration 10.5 % v/v SO 2 , production of 145000 tonnes/yearTable 4.11: Cost estimate for retrofitting a double contact plant with a 5 th catalyst bed[57, Austrian UBA, 2001]Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 177