The Study On Combustion Adjustment And Burner Modification For The Boiler Of DG670/13.7-4

With increasing of capacity of power grid, every unit may turn into peak load unit. This article analyzes thoroughly problems that unstable combustion, low capacity of peak shaving,low-level automatization etc. occur in peak shaving operation by taking example for boiler MOD DG670/13.7-4. Steps are revealed that must be taken when boiler without designed capability of peak shaving takes part in peak shaving operation: one is combustion adjustment, the other one modification of burner. By analysis of factors that influence stability of boiler combustion, test project is validated. After combustion adjustment test, an optimized adjustment project is worked out. By analysis of mechanism of stable combustion of different burners, burners are modified according to principle of buner selection. After authentication and analysis of buner modification, combustion adjustment project is optimized again, burner modification scheme is validated.Using opportunity of upgrading of DCS, work are completed that design and optimization of logic diagram of BMS of homemade boiler put into production early. Level of unit operation automatization is increased greatly, operation gets more economical.This study is a successful example of modificatiion of old unit, has reference to operation, regulation and modificatiion of old unit.Xu Wenbiao (power plant Thermal power engineering) Directed by prof. Sun Baomin...