By establishing the water wall heated model

furnace regional segmentation was conducted to study the heat load distribution of water wall in height direction.Regarding the heat load distribution coefficient in horizontal direction as the medium

the heat load in height direction was transformed into the one in horizontal direction.Taking the two extreme positions where the heat load of the water wall in horizontal direction was the maximum and the minimum as the examples

calculation on opening degree of control valve at inlet of the water wall in hot state was performed.The heat transfer coefficient of the working fluid was applied to conduct the phase section division

like the saturated water

steam-water mixtures and superheated steam.Considering the water wall tubes at the position where the heat load was the highest in furnace circumferential direction(i.e.the relative width is 0.54)as the calculation criterion

the pressure drop in each phase section was obtained.Thus

the opening degree of valves at other relative positions was adjusted correspondingly to ensure the pressure difference in each water wall tube was the same and the water flow took away the heat load associated with its quantity

ensuring the hydrodynamic stability of water wall in hot state.