The structure of double - flow weak - acid resin hydrogen ion exchanger introduced in this Paper is line a double - flow mechanical filter. The lowerresin bed under the easting tube is higher than the upper resin aam by 0. sin. It has the advantage of doubled output flow with a lower resin consump-tion

which will result in less investment and occupation of space. It has also a higher regeneration rate with lOwer water demand. Since the first actwas Put into operation in 1990

this type of exchanger has been applied to over 30 POwer plants for circulating water treatment

most of the units inthese Plants are of 300MW.