Directing against the problems existing in the coldstate hydrodynamic adjustment method utilized at present

a new hydrodynamic adjustment method

namely the hotstate adjustment method

of the verticaltube platen type oncethrough boiler has been put forward

and a hydrodynamic adjustment programme being worked out on the basis of mathematic model regarding the hotstate adjustment method. The practical results of application show that the online flow distribution in the waterwall can be realized by the said hotstate method based on variation of boiler load and heat load in the furnace

making the flow in waterwall tubes and the heat load in the furnace to be coordinated in unanimity from begining to end

decreasing greatly the alternative variation of waterwall tube temperature

lengthening the service life of waterwall tubes. It has important significance for unit with oncethrough boiler to start or to stop

as well as to operate under load variation.