Adopting the water sample prepared from actual corrosion products of iron in power plants

the performance of home-made new type(CAD) high gradient electro-magnetic filter has been tested.Results show that the iron content in effluent water is 2.5 μg/L

while that in inffluent water is 20 μg/L under condition of the rated flow rate in said CAD filter being 10 m3/h(flow speed 266 m/h)

the iron removal rate is 86.8%

the iron content in effluent water reaching the water quality standard of 5μg/L iron content in feed-water of supercritical once-through boiler specified in GB/T 12145—2008 《The water-steam quality of thermal power units and steam power equipments》.In the case of iron content in inffluent water being 40

185

700

and 1500 μg/L respectively

the iron content in effluent water is 7.6

12.2

18.1

and 26.2 μg/L respectively

the iron removal rate is 81.4%

93.4%

97.4%

and 98.3% respectively.Excepting the CAD high gradient electro-magnetic filter can remove the ferromagnetic corrosion products

its removal efficiency for paramagnetic corrosion products is also higher.