Automatic forward-backward flushing membrane filtering water-cleaning system

Abstract

The invention provides an automatic forward-backward flushing membrane filtering water cleaning system which comprises a water incoming pipeline, a blow-off pipeline, a water outgoing pipeline, a control system and two identical inner-pressure hollow fiber ultra-filtration membrane components. A water inlet, a water outlet and a clean water producing port are arranged on the inner-pressure hollow fiber ultra-filtration membrane components, a raw water inlet end is connected with a first electric ball valve and a second electric ball valve through the water incoming pipeline respectively, a blow-off outlet end is connected with a third electric ball valve and a fourth electric ball valve through the blow-off pipeline respectively, and a clean water outlet end is connected with a fifth electric ball valve through the water outgoing pipeline. The invention further provides a control method of the water cleaning system and an automatic forward-backward flushing ultra-filtration anti-seepage water cleaning system comprising the water cleaning system. The automatic forward-backward flushing membrane filtering water cleaning system has the advantages that forward flushing and backward flushing of an ultra-filtration membrane can be realized automatically when the water cleaning system is in use, service life of the ultra-filtration membrane is prolonged, and the water cleaning system is free of maintenance; the water cleaning system can provide ultra-filtration clean water and anti-seepage pure water at the same time, so that using needs of people are met.

Description

Technical field [0001] The invention belongs to the field of water purification treatment, and particularly relates to an automatic positive and negative washing membrane filtration water purification system. Background technique [0002] The water purification process of the existing water purification system is usually: pre-filtration device→pre-filtration device→ultrafiltration device→reverse osmosis device. The raw water is transformed into purified water containing minerals through the ultrafiltration device, and it is changed by the reverse osmosis device. For pure water, the large particles in the raw water are removed through the pre-filtration device and the pre-filtration device. The ultra-filtration device intercepts microorganisms, colloids, suspended solids, and macromolecular organic substances. The water filtered by the ultra-filtration device becomes mineral-containing Material water purification, reverse osmosis device removes ions, small molecules, etc. in the w...

AI Technical Summary

Problems solved by technology

[0002] In the existing water purification system, the water purification process is usually: pre-filtration device → pre-filtration device → ultrafiltration device → reverse osmosis device, the raw water is converted into purified water containing minerals through the ultrafiltration device, and transformed into For pure water, the large particles in the raw water are removed through the pre-filtration device and the pre-filtration device, and the ultra-filtration device intercepts microorganisms, colloids, suspended solids and macromolecular organic matter, etc., and the water filtered by the ultra-filtration device becomes mineral-containing For water purification of substances, the reverse osmosis device removes ions and small molecules in the water to become pure water. The filter element and filter membrane of the above-mentioned water purification system do not have automatic cleaning function, and need to be replaced after about 3-6 months of use. The purchase of filter elements and filter membranes requires professionals to replace them, which brings a lot of inconvenience to users and increases the cost of use

[0003] Chinese patent CN101143303B discloses a household fully automatic double-membrane self-flushing water purification device, which realizes the backwash of the filter membrane, but it lacks the positive flushing process of the filter membrane, and it is easy to form a dead angle at the port of the filter membrane. Incomplete; and the control system of the water purification device uses a solenoid valve. The action process of the solenoid valve opening and closing is instantaneous, and water hammer is easily generated, causing impact damage to the ultrafiltration membrane and reducing the life of the membrane.

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