Seeking help regarding material balance issues in sulfuric acid production

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I majored in automation, and my supervisor comes from a chemical plant. I am designing a material metering system for sulfuric acid production in a plant with an annual output of 100,000 tons of sulfuric acid; such a plant generates 100,000 cubic meters of flue gas per hour. My supervisor was furious, saying that such a high flow rate is impossible. Is there something wrong with my calculation? The designed annual output of sulfuric acid is 2,000,000 tons, corresponding to 98.8% H2SO4. Therefore, the amount of acid produced per hour is calculated as follows: 100,000 × 98.8% × 1000 / (300 × 24) = 13,722.225 kg/h. In the conversion process, the sulfur dioxide content is a = 0.09, and the oxygen content is b = 0.086. In the absorption stage, the sulfur trioxide content is c = 0.089, with a total conversion rate of x = 0.98 and an absorption efficiency of η = 0.99. The standard volume of gas entering the converter, on an hourly basis, is given by V_std = Y × 22.4 / (98 × x × η_abs × a) = 35,920.52 nm3. The temperature of the flue gas entering the first section of the converter is 430°C, with a negative pressure of 10 kPa. V_actual = V_standard = 102776.27 m3. Composition of the furnace gas: SO2 = V_standard × a = 3232.85 nm3; O2 = V_standard × b = 3089.16 nm3; N2 = 34855.966 – 3137 – 2997.6 = 29598.51 nm3. The standard volume of gas flowing into the absorption tower is calculated on an hourly basis: V_standard = Y × 22.4 / (98 · x · c) = 35597.65 nm3; SO3 = V_standard × c = 3168.19 nm3; V_actual = V_standard = 56938.81 m3