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THEORETICAL ANALYSIS AND PRACTICE ON THE SELECTION OF KEY PARAMETERS FOR HORIZONTAL BIAS BURNER
作者姓名:刘泰生  许晋源
作者单位:School of Energy and Power Engineering,Xi’an Jiaotong University,School of Energy and Power Engineering,Xi’an Jiaotong University Xi’an 710049,China,Xi’an 710049,China
基金项目:ThisworkwassupportedbytheNationalKeyTechnologiesR&DProgramduringthe9thFiveYearPlanPeriod( 96 A1 9 0 1 0 1 1 2 )
摘    要:1 INTRODUCTIONIthasbeentestifiedboththeoreticallyandprac ticallythattheignitiontemperatureofpulverized coalcanbelowered ,theignitionheatrequiredcanbedecreasedandtheNOxemissioncanbeloweredduetotheadoptionofthebiascombustiontechnolo gy1 ] .Withthehorizontalbiasburneradopted,theprimary airisdividedintotwopartswithdifferentconcentrationsofpulverized coalhorizontally .Therichprimary airisshotintothefurnacewindward(facingthefireball) ,andthelean primary airisshotintothefurnaceleeward (backtot…


THEORETICAL ANALYSIS AND PRACTICE ON THE SELECTION OF KEY PARAMETERS FOR HORIZONTAL BIAS BURNER
Abstract:The air flow ratio and the pulverized coal mass flux ratio between the rich and lean sides are the key parameters of horizontal bias burner. In order to realize high combustion efficiency, excellent stability of ignition, low NO x emission and safe operation, six principal demands are presented on the selection of key parameters. An analytical model is established on the basis of the demands, the fundamentals of combustion and the operation results. An improved horizontal bias burner is also presented and applied. The experiment and numerical simulation results show the improved horizontal bias burner can realize proper key parameters, lower NO x emission, high combustion efficiency and excellent performance of part load operation without oil support. It also can reduce the circumfluence and low velocity zone existing at the downstream sections of vanes, and avoid the burnout of the lean primary air nozzle and the jam in the lean primary air channel. The operation and test results verify the reasonableness and feasibility of the analytical model.
Keywords:burner  key parameters  analytical model
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