The technical requirements of combined one section pipe-blowing mode with energy-storing and pressure-reducing have been analysed

and the pipe-blowing parameters being calculated

and determind.The pipe-blowing features of a DG1089/17.4-Ⅱ1 type CFB boiler for one 300 MW unit have been summarized as in the following:(1)small amount of adjustment in air and flue gas systems;(2)large consumption of fuel oil and little consumption of coal in the process of pipe-blowing;(3)the resistance in air and flue gas systems was larger increasing the pressure gradient in said systems;(4)the steam temperature is more affected by the bed temperature;(5)the CFB boiler has larger thermal storage

the duration of single time pipe-blowing has to be longer.The key points of control in air and flue gas systems

as well as in combustion system and feed-water system are given.