The invention discloses a swirling flow type screen filtering device which comprises a first
water storage tank, a filtering screen, a waste collecting screen, a waste collecting
pipe, a waste discharging
pipe and a concentration bag. The filtering screen is located on the upper portion of the waste collecting screen, the two ends of the waste collecting
pipe are communicated with the waste collecting screen and the waste discharging pipe respectively, the other end of the waste discharging pipe is communicated with the concentration bag, the filtering screen, the waste collecting screen, the waste collecting pipe and the waste discharging pipe are located inside the first
water storage tank, the concentration bag is located outside the first
water storage tank, an aerating device is arranged at the bottom of the waste collecting screen, and a first water outlet pipe is arranged on the lower portion of the first
water storage tank. The invention further discloses a swirling flow type screen filtering
system and a method of the swirling flow type screen filtering
system for filtering waste water. The circulating water industrial
aquaculture technology of the swirling flow type screen filtering device is not dependent on an imported and high-price drum micro-filtering
machine any more, the shortcomings that an industrial
aquaculture system is high in
investment cost and energy dissipation, wastes water and the like are overcome, and the
investment cost and the operation cost are reduced by more than 20% and 15% respectively.