The invention relates to a device for changing a
water channel to remove iron and
manganese ions in water in a forced mode. The device consists of a water inlet
pipe, a water distribution plate, a
filter material bed, a
water flow resistance plate, a water outlet
pipe, a water
distribution system and a tank body, and is characterized in that the top end of the filter tank is connected with the water inlet
pipe; the water distribution plate is positioned in the filter tank; the water distribution plate is horizontally centered and is arranged at the lower end of the water inlet pipe; the
filter material bed is positioned at the middle section in the filter tank; the
water flow resistance plate is arranged on two sides of the inner wall of the filter tank; the water
distribution system is positioned below the
filter material bed in the filter tank; and the water outlet pipe is connected to the bottom of the filter tank. The structure in the filter tank is changed, and the
water channel is changed in a forced mode, so that the
water flow is uniformly filled with the whole filter material, the filter material is fully utilized, the water distribution plate is flushed through hydraulic power, the
potential energy of the water flow is reduced, and the direct
impact of the water flow on the lower filter material is reduced; and due to the water flow resistance plate on the tank wall, the water flow in the filter can be uniform in water distribution, the resistance of each point in the plane is balanced, the removal rate of iron and
manganese is improved, and the stable operation of the filter tank is not influenced.