Application of Air Volume Cutting Technology to Prevent Plugging of Rotary Air Preheater
With the proposal of"carbon peaking"and"carbon neutrality",the country vigorously develops new clean energy such as hydro-power,wind power and photovoltaic,which is followed by the frequent and deep peaking operation conditions of thermal power units,and the rise of ammonia escape in SCR denitration system,which leads to the ash blocking problem of rotary air preheater.A series of problems such as rising pressure difference,rising smoke exhaust temperature,decreasing heat transfer efficiency,and rising power consumption of fan oper-ation cause great economic losses and security risks.In order to ensure the normal,stable and safe operation of the boiler under the condition of frequent and deep peak loading,it is urgent to prevent the blockage of the air preheater.As a new technology aimed at solving the ash blockage of rotary air preheater,air flow cutting anti-ash blocking technology is reformed inside the air preheater,so that part of the hot air is circulated to the cold end through the air duct,and the heat storage element at the cold end is heated,which can effectively prevent the con-densation of dilute sulfuric acid and remove the effect of ammonium bisulphate.Combined with the application of practical projects,Through the analysis of the operation data,the resistance of the air preheater is reduced significantly and the power consumption of the three fans is re-duced.Therefore,the technology not only solves the ash blocking problem of the current rotary air preheater,improves the stability and safety of the unit operation,but also improves the efficiency of the boiler,and the effect of energy saving and consumption reduction is remarkable.
air volume scuttlingair preheateranti-blocking ashair leakage rate
万方数据
维普
