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5906-011Cf2A/APPENDIX/4/18/95 APPENDIX A-I Energy Conservatlon Opportumtles (ECO's)
ECO-04. ECO-06, AND ECO-OB CALCULATIONS IN-SITU OXYGEN ANALYZERS. MAZUT FLOW METERS AND COAL FLOW METERS 1 0 INTRODUCTION The bOilers air to fuel ratio IS controlled manually The eXisting extractive paramagnetic type oxygen analyzers are maintained and calibrated However, the Instruments are prone to being fouled by mOisture and aCid sludge from the flue gas. Also, there IS a slgntflcant time lag between sample POint and readout, which IS aggravated by sWings In excess oxygen due to fluctuations of coal feed to burners The biggest problem with the eXisting extractive analyzers IS that the sample IS taken after major air In-leakages has already occurred Installation of in-Situ zircontum oXide cells upstream of major In-leakages would Improve reliability, response, and accuracy of readings 2 0 ASSESSMENT OF POTENTIAL EXCESS OXYGEN REDUCTION There IS the potential to reduce the levels of excess oxygen at the Burshtyn untts This potential IS based on the current levels of excess oxygen that are maintained at the burners In order to assess thiS potential, It IS necessary to evaluate the measured excess oxygen levels and account for air In-leakage through the various sections of the bOiler Normal burner deSign calls for an excess oxygen level at the burners of 3 5% For burners of thiS deSign and vintage, It would be more appropriate to assume that the excess oxygen level would be closer to 4 0% These are the minimum levels required for stable flame and proper combustion. Excess oxygen levels higher than thiS prOVide the opportuntty for a reduction In the operating levels. 2.1 Evaluation of Excess Oxygen at the Burners At full load firing coal, the excess oxygen was measured In the convection pass and ahead of the air heaters The excess oxygen measured was a maximum of 6 1% BRC calculation Indicates that the corresponding excess oxygen at the burner IS about 5.0% Accounting for the eXisting burner deSign, the minimum excess oxygen at the burners would be assumed to be approximately 4 0% Thus, the potential reduction In excess oxygen at the burners would be 5 0 - 4 0 = 1 0% 2.2 Effect of Excess Oxygen on BOiler EffiCiency Baller effiCiency IS calculated based on the ASME Baller Test Code, PTC-4 1 The losses In bOiler effiCiency affected by the excess oxygen levels are the dry flue gas loss and the mOisture In air loss The dry flue gas loss IS the loss of heat determined by the flue gas flow and the difference In temperature of the flue gas and the ambient air. The mOisture In air loss IS the same loss calculated for the mOisture that IS contained in the air The reference excess oxygen was selected to be 4 0%, which IS typical for coal fired burners of thiS deSign and vintage BOiler effiCiency was calculated for excess oxygen levels up to 6%, to account for pOSSible operating conditions above the optimum G \BENDER\BURSCALC 1 MAY 3, 1995
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5906-01I02A1APPENDIX/41l8/95 APPEND
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) Audit Equipment RECOMMENDATIONS B
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') CHECKLIST IMPROVING COMBUSTION E
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EXECUTIVE SUMMARY INTRODUCTION GENE
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INTRODUCTION ENERGO SYSTEM: LOCATIO
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PC boilers. They are also intereste
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1.1 IntroductIon TRIP REPORT USAID/
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• • • technology and requeste
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TRIP REPORT Delivery Order No 6 - E
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cooling water flow to condensers. N
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• • • Instromet natural gas c
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• • 1 PTVM-100, Station 2 - adj
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availability of a pnnter, Its possi
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State Committee of the Autonomous C
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Month Consumption ODESSA CHP PLANT
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Month Consumption ODESSA CHP PLANT
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BURsHTYN NATURAL GAS 1996 P 1997 P
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