Membrane filter

Abstract

The membrane filter apparatus includes a water inlet system, a membrane filter system, a water producing system, an aeration system and a control system. The membrane filter system includes membrane filter tank and inside immersed modules, which has gas inlet pipe connected via the aeration system to the control system, water outlet port connected to the water producing system via valve and pressure meter and 2-10 membrane assemblies comprising curtain type membrane and connected to the aeration system via pipeline. The aeration system includes blower, gas flow meter, aeration regulating valve and aeration pipe connected successively via pipes and connected to the control system. The control system has PLC controller and corresponding software. The membrane filter apparatus is used in pre-treatment of sea water and the unique aeration mode results in raised antifouling capacity and long service life of the membrane and stable water output quality and amount.

Description

technical field [0001] The invention relates to a membrane filtration device in the field of membrane separation technology, specifically a submerged curtain membrane filtration device mainly used for water purification and reverse osmosis seawater desalination pretreatment, and the international patent main classification number is intended to be Int.Cl 7 B01D63 / 02. Background technique [0002] The core desalination element in the reverse osmosis seawater desalination process is the reverse osmosis membrane. This kind of reverse osmosis membrane requires that the incoming seawater must meet a certain water quality index before it can enter. Therefore, the seawater must be pretreated before the reverse osmosis membrane element, that is, to remove solid particles, bacteria, algae and other impurities in the seawater. , so as not to cause contamination of the reverse osmosis membrane. Among the above-mentioned water quality indicators, the most important indicator is the p...

AI Technical Summary

Problems solved by technology

For the membrane module composed of two diaphragms, its main disadvantage is that it cannot solve the pollution problem of the curtain membrane well

During use, because the membrane module only aerates the lower part of the membrane, there will be sludge between the two membranes of the same membrane module, resulting in a decrease in the effective filtration area of ​​the membrane and a decrease in flux. Causes the root of the membrane to break, leading to loss of membrane function and serious deterioration of effluent quality

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