Composite filter element assembly and water purification system

Abstract

The invention provides a composite filter element assembly and a water purification system.The composite filter element assembly comprises a raw water inlet, a produced water outlet, a wastewater outlet, a first filter element and a second filter element, the first filter element comprises first hollow fiber filtering membrane filaments, the second filter element comprises second hollow fiber filtering membrane filaments, and the second filter element is located on the radial inner side of the first filter element; water entering from the raw water inlet can be filtered by the first filter element, enters the first hollow fiber filter membrane filaments during filtration and is finally guided out through the produced water outlet, and water not entering the first filter element can be filtered by the second filter element. During filtration, water enters the second hollow fiber filtration membrane filaments and is finally guided out through the produced water outlet, and water which does not enter the second filter element can be communicated with the wastewater outlet and is guided out. According to the present invention, the filtration precision is high, and compared with the traditional ultrafiltration filtration core technology, the scaling risk is reduced, and the wastewater recycling rate can be improved.

Description

technical field [0001] The invention belongs to the technical field of water purification, and in particular relates to a composite filter element assembly and a water purification system. Background technique [0002] With the continuous development of the water purification market, the current high-throughput household water purifiers currently on the market account for an increasing proportion, and the flux of new household water purifiers is still increasing. Currently, 1000+G household All major brands of water purifiers are on sale; the core filter elements of large-flow household water purifiers are still reverse osmosis filters and nanofiltration filters. Due to the characteristics of low operating pressure, large pure water flux, and low operating cost, nanofiltration filter elements are becoming more and more popular in the market. [0003] At present, most of the reverse osmosis membranes and nanofiltration membranes used in the field of water treatment adopt pre...

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the traditional filter element assembly in the prior art cannot simultaneously meet the requirements of high filtration accuracy, low operating cost, large water production flux, and convenient installation, thereby providing a composite filter element assembly and a clean water system

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