logging in or signing up boiler losses shivajichoudhury Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 618 Category: Science & Tech.. License: All Rights Reserved Like it (1) Dislike it (0) Added: January 06, 2011 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: dku32000 (13 month(s) ago) sir, request you to send this ppt to me on my mail id' dku32000@yahoo.com it is very useful presentation for me. thx Saving..... Post Reply Close Saving..... Edit Comment Close By: eng_khial (13 month(s) ago) gooooooooooooooooooooooooooooooooooood Saving..... Post Reply Close Saving..... Edit Comment Close By: tiwarsan (15 month(s) ago) pls send Saving..... Post Reply Close Saving..... Edit Comment Close By: tiwarsan (15 month(s) ago) good Saving..... Post Reply Close Saving..... Edit Comment Close By: slandge123 (15 month(s) ago) pl send this presentaion, thanks Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript BOILER LOSSES : BOILER LOSSES SHIVAJI CHOUDHURYBOILER LOSSES: BOILER LOSSES 1.Moisture losses 2.Dry gas losses 3.Incomplete combustion 4.Radiation losses1.MOISTURE LOSSES: 1.MOISTURE LOSSES Coal quality Increased volatile matter Increased moisture High moisture in air Tube leakage Increased make up Increased precipitated current draw Increased stack opacity Boiler walk down2.DRY LOSSES: 2.DRY LOSSES 2.1.Boiler casing leakage 2.2.Air pre heater leakage 2.3.Incorrect fuel to air ratio 2.4.Fouled heat transfer surfaces2.1.BOILER CASING AIR LEAKAGE: 2.1.BOILER CASING AIR LEAKAGE Decreased exit furnace temperature (Before econ) Low combustion air flow and normal O2 at furnace exit Decreased exit boiler temperature (after econ )2.2.AIR PRE HEATER LEAKAGE: 2.2.AIR PRE HEATER LEAKAGE Decreased avg cold end temp Increased air heater and normal O2 at boiler exit2.3.INCORRECT FUEL TO AIR RATIO: 2.3.INCORRECT FUEL TO AIR RATIO High O2 at boiler exit Incorrect combustion control signals.2.4.FOULED HEAT TRANSFER SURFACES: 2.4.FOULED HEAT TRANSFER SURFACES Boiler water walls Increased main steam temperature Super heater Decreased main steam temperature Re heater Decreased re heater temperature Economizer Decreased in economizer out temp Increase in main steam temp Air pre heater Low exit air temp Normal inlet gas and air temp3.INCOMPLETE COMBUSTION: 3.INCOMPLETE COMBUSTION SYMPTOM Unburned carbon loss CAUSE Coal quality Increased carbon content Increased ash content Burner tips plugged Burner damper setting Improper aux to burner air ratio Incorrect fuel to air ratio Decrease in mill fineness3.1.DECREASE IN MILL FINENESS : 3.1.DECREASE IN MILL FINENESS SYMPTOM Sieve test results: fineness < 70% thru 200 mesh. CAUSE Loss of roller tension Ring roller wear Classifier vane wear Exceeding mill capacity Classifier vane improperly adjusted4.RADITION LOSSES: 4.RADITION LOSSES Boiler skin temp >25 deg C above ambient air temperature Surface air velocity HI ( > design value )Losses in Thermal Power Plant: Losses in Thermal Power PlantSUPER CRITICAL BOILER: SUPER CRITICAL BOILERTHANKING YOU: THANKING YOU You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
boiler losses shivajichoudhury Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 618 Category: Science & Tech.. License: All Rights Reserved Like it (1) Dislike it (0) Added: January 06, 2011 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: dku32000 (13 month(s) ago) sir, request you to send this ppt to me on my mail id' dku32000@yahoo.com it is very useful presentation for me. thx Saving..... Post Reply Close Saving..... Edit Comment Close By: eng_khial (13 month(s) ago) gooooooooooooooooooooooooooooooooooood Saving..... Post Reply Close Saving..... Edit Comment Close By: tiwarsan (15 month(s) ago) pls send Saving..... Post Reply Close Saving..... Edit Comment Close By: tiwarsan (15 month(s) ago) good Saving..... Post Reply Close Saving..... Edit Comment Close By: slandge123 (15 month(s) ago) pl send this presentaion, thanks Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript BOILER LOSSES : BOILER LOSSES SHIVAJI CHOUDHURYBOILER LOSSES: BOILER LOSSES 1.Moisture losses 2.Dry gas losses 3.Incomplete combustion 4.Radiation losses1.MOISTURE LOSSES: 1.MOISTURE LOSSES Coal quality Increased volatile matter Increased moisture High moisture in air Tube leakage Increased make up Increased precipitated current draw Increased stack opacity Boiler walk down2.DRY LOSSES: 2.DRY LOSSES 2.1.Boiler casing leakage 2.2.Air pre heater leakage 2.3.Incorrect fuel to air ratio 2.4.Fouled heat transfer surfaces2.1.BOILER CASING AIR LEAKAGE: 2.1.BOILER CASING AIR LEAKAGE Decreased exit furnace temperature (Before econ) Low combustion air flow and normal O2 at furnace exit Decreased exit boiler temperature (after econ )2.2.AIR PRE HEATER LEAKAGE: 2.2.AIR PRE HEATER LEAKAGE Decreased avg cold end temp Increased air heater and normal O2 at boiler exit2.3.INCORRECT FUEL TO AIR RATIO: 2.3.INCORRECT FUEL TO AIR RATIO High O2 at boiler exit Incorrect combustion control signals.2.4.FOULED HEAT TRANSFER SURFACES: 2.4.FOULED HEAT TRANSFER SURFACES Boiler water walls Increased main steam temperature Super heater Decreased main steam temperature Re heater Decreased re heater temperature Economizer Decreased in economizer out temp Increase in main steam temp Air pre heater Low exit air temp Normal inlet gas and air temp3.INCOMPLETE COMBUSTION: 3.INCOMPLETE COMBUSTION SYMPTOM Unburned carbon loss CAUSE Coal quality Increased carbon content Increased ash content Burner tips plugged Burner damper setting Improper aux to burner air ratio Incorrect fuel to air ratio Decrease in mill fineness3.1.DECREASE IN MILL FINENESS : 3.1.DECREASE IN MILL FINENESS SYMPTOM Sieve test results: fineness < 70% thru 200 mesh. CAUSE Loss of roller tension Ring roller wear Classifier vane wear Exceeding mill capacity Classifier vane improperly adjusted4.RADITION LOSSES: 4.RADITION LOSSES Boiler skin temp >25 deg C above ambient air temperature Surface air velocity HI ( > design value )Losses in Thermal Power Plant: Losses in Thermal Power PlantSUPER CRITICAL BOILER: SUPER CRITICAL BOILERTHANKING YOU: THANKING YOU