Immersion type hollow fiber membrane separator and its running process

Abstract

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.

Description

technical field [0001] The invention relates to a membrane separation technology, specifically a submerged hollow fiber membrane separation device mainly used for water purification treatment and its operating method. Background technique [0002] Membrane separation or filtration can be divided into column type membrane separation device and curtain type membrane separation device in two ways. The curtain membrane separation device generally adopts the submerged design and is used in the pretreatment process of membrane bioreactor or seawater desalination. Column membrane separation devices generally adopt a non-immersed design and are mainly used in sewage or water treatment processes. For example, the applicant's prior Chinese patent (ZL00238164.8) discloses a technology for the application of an internal pressure membrane column membrane separation device; An operation method of an external pressure hollow fiber membrane separation device is introduced, which introduce...

AI Technical Summary

Problems solved by technology

The obvious disadvantages of this non-submerged column membrane separation or filtration device are: 1. It must be equipped with a powerful pressure pump and a complex pipeline and valve control system to allow the treatment object to enter and output from the membrane device; 2. It is necessary to build or arrange appropriate houses to provide installation sites for membrane treatment equipment or devices; 3. It is necessary to design sensitive and reliable membrane device damage or air leakage detection devices or mechanisms to ensure the quality of water after membrane treatment

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