Daily Question 2015.9.21 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers (single-choice question)
Thread Content
The current annual SO2 emission volume of a certain coal-fired boiler is 90.0 tons/year. It is planned to install desulfurization equipment on the boiler, increasing the desulfurization efficiency from the current 50% to 80%. After the technical renovation of the project, the current total emissions of SO2 are (). A. 90.0 t/a B. 45.0 t/a C. 36.0 t/a D. 18.0 t/a The correct answer is C. Explanation: First, calculate the amount of sulfur dioxide produced: (x–90)/x = 0.5 –––– x = 180 t/a. Therefore, when the desulfurization efficiency is 80%, (180–y)/180 = 80% –––– y = 36 t/a
The current annual SO2 emission volume of a certain coal-fired boiler is 90.0 tons/year. It is planned to install desulfurization equipment on the boiler, increasing the desulfurization efficiency from the current 50% to 80%. After the technical renovation of the project, the current total SO2 emissions amount to (C).
Option C, 36t/a~~~~~~~~~~~~~~~~~~
C, 90/（1-0.5）*（1-0.8）=36t/a.
C. -----------------------
The current annual SO2 emission volume of a certain coal-fired boiler is 90.0 tons/year. It is planned to install desulfurization equipment on the boiler, increasing the desulfurization efficiency from the current 50% to 80%. After the technical renovation of the project, the current total emissions of SO2 are (). C.36.0t/a
The current annual SO2 emission volume of a certain coal-fired boiler is 90.0 tons/year. It is planned to install desulfurization equipment on the boiler, increasing the desulfurization efficiency from the current 50% to 80%. After the technical renovation of the project, the current total SO2 emissions amount to (C). A.90.0t/a B.45.0t/a C.36.0t/a D.18.0t/a
The current annual SO2 emission volume of a certain coal-fired boiler is 90.0 tons/year. It is planned to install desulfurization equipment on the boiler, increasing the desulfurization efficiency from the current 50% to 80%. After the technical renovation of the project, the current total SO2 emissions amount to (C). A.90.0t/a B.45.0t/a C.36.0t/a D.18.0t/a