The present invention relates to an immersion hollow
fibrous membrane separating device and the operation method thereof. The device comprises a membrane
filtration system, a water producing
system and a cleaning
system which are connected by the tubes and a
control system which is connected by a circuit, the present invention is characterized in that the membrane
filtration system takes an immersion type, adopting a column
external pressure hollow
fibrous membrane component, a plurality of holes are arranged at the casing, the device is directly and vertically arranged in the processed
water body; the water producing system comprises a pressure gauge, an automatic intake valve, a water producing pump, a flow meter and an automatic
discharge valve which are sequentially connected with a water producing opening of the membrane module; the cleaning system comprises a backflushing system, a gas
vacuole scrubbing system and a
chemical cleaning system, the gas
vacuole scrubbing system comprises a flow meter, an air
inlet valve, an air adjusting valve, a filtrating pressure reducing valve, an
air receiver and an air compressed valve which are sequentially connected with the backflushing air intake of the membrane module. The operation method includes a plurality of cyclic processes as follows: 1. an operating state, a backflushing state, a gas
vacuole scrubbing state and a
pollution discharge state; 2. the operating state, the backflushing and gas vacuole scrubbing state, an gas vacuole scrubbing state and the
pollution discharge state; 3. the operating state, a chemical backflushing state, the gas vacuole scrubbing state and the
pollution discharge state.