Immersion type hollow fiber membrane separator and its running process

Abstract

The invention relates to a submerged hollow fiber membrane separation device and an operation method thereof. The device includes a pipe-connected membrane filtration system, a water production system, a cleaning system and a line-connected control system, and is characterized in that the membrane filtration system is submerged, adopts a column-type external pressure hollow fiber membrane module, and has many holes on the shell, and The device is directly installed vertically in the treated water body; the water production system includes a pressure gauge, an automatic water inlet valve, a water production pump, a flow meter and an automatic water outlet valve that are sequentially connected to the water outlet of the membrane module; the cleaning system includes a backwash system, A bubble scrubbing system and a chemical cleaning system. The bubble scrubbing system includes a flow meter, an inlet valve, an air regulating valve, a filter pressure reducing valve, an air storage tank and a compressed air pump that are sequentially piped to the backwash inlet of the membrane module. The operation method includes the following cycle processes: 1. Working state, backwashing state, bubble scrubbing state, and sewage discharge state; 2. Working state, backwashing plus bubble scrubbing state, bubble scrubbing state, and sewage discharge state; 3. Working state, Chemical backwashing status, bubble scrubbing status, blowdown status.

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 operating method of an external pressure hollow fiber membrane separation device is introduced, which introduce...

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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. Appropriate houses must be built or arranged to provide installation sites for membrane treatment equipment or devices; 3. The design must be sensitive Membrane device damage or air leakage detection device or mechanism to ensure the quality of water after membrane treatment

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