Presentation is loading. Please wait.

Presentation is loading. Please wait.

Cynthia Schmidt Mechanical Engineering Department University of Texas Methods to Reduce Sulfur Dioxide Emissions From Coal-Fueled Utilities.

Similar presentations


Presentation on theme: "Cynthia Schmidt Mechanical Engineering Department University of Texas Methods to Reduce Sulfur Dioxide Emissions From Coal-Fueled Utilities."— Presentation transcript:

1 Cynthia Schmidt Mechanical Engineering Department University of Texas Methods to Reduce Sulfur Dioxide Emissions From Coal-Fueled Utilities

2 Three classes of methods exist for reducing emissions of sulfur dioxide post-combustion methods combustion methods pre-combustion methods

3 Coal switching and coal cleaning are two precombustion methods Coal Cleaning Coal Switching High Sulfur MineLow Sulfur Mine

4 Utilities can reduce SO 2 emissions by switching to low sulfur coal 70% removal of SO 2 no capital costs increased coal costs increased transportation costs Low Sulfur MineHigh Sulfur Mine

5 Coal cleaning removes sulfur from the coal after it is mined Coal Cleaning 20–70% removal of SO 2 no capital costs increased coal cost decreased transportation costs decreased operating costs

6 90% removal capability low capital cost—able to use in existing equipment high operating cost ability to use different grades of coal separator air inlet cleaned exhaust grid Choose a format that's professional The most effective combustion method is an atmospheric fluidized bed

7 Absorption and adsorption are two post-combustion processes mist eliminator spray water inlet for combustion gases gas outlet drain Absorption Adsorption inlet for combustion gases gas outlet stationary sorbent bed

8 Absorption removes SO 2 by washing the exhaust gas after combustion 90–95% removal of SO 2 high capital costs increased operating costs large amounts of water needed disposal problem for sludge mist eliminator spray water inlet for combustion gases gas outlet drain Absorption

9 Adsorption removes sulfur dioxide with a stationary sorbent bed Adsorption gas outlet inlet for combustion gases stationary sorbent bed 80% removal of SO 2 high capital costs no need for water increased operating costs

10 Percentage Reduction of SO 2 coal cleaning coal switching fluidized bed absorption adsorption % 80% 90% 95% 80% By using these methods, coal utilities can greatly reduce SO 2 emissions


Download ppt "Cynthia Schmidt Mechanical Engineering Department University of Texas Methods to Reduce Sulfur Dioxide Emissions From Coal-Fueled Utilities."

Similar presentations


Ads by Google