Cleaning method of water purifier

Abstract

The invention discloses a cleaning method of a water purifier. The water purifier comprises a filter unit with a hollow fiber ultra-filtration membrane, a water tank unit for storing the water already purified by use of the filter unit, and a drainage unit for draining the purified water stored in the water tank unit and sewage after cleaning. The cleaning method comprises a conventional mechanical cleaning method and specifically comprises the steps of water injection, cleaning, sewage disposal and re-cleaning. The cleaning method of the water purifier is high in efficiency, simple and convenient, and an electromagnetic valve is used for controlling water inflow and outflow, so that the system is simpler and can be widely applied to cleaning of hollow fiber ultra-filtration membrane water purifiers.

Description

technical field [0001] The invention belongs to the field of cleaning water purifiers, and in particular relates to a cleaning method for water purifiers. Background technique [0002] The current household ultrafiltration water purifiers mostly use hollow fiber membranes to filter out tiny suspended solids, colloids, particles, bacteria and other substances in the water, and the filtered water can be directly drunk. Hollow fiber membranes are generally cleanable and reusable. There are mainly two ways to restore the membrane flux of hollow fiber membranes: one is chemical cleaning, and the cleaning effect is achieved by soaking in chemicals and chemically reacting with the dirt on the membrane. This cleaning method is complicated, and the frequent use of chemicals will also have a certain impact on the service life of the membrane material. It also requires supporting facilities and has high requirements for the use environment. Therefore, chemical cleaning methods are main...

AI Technical Summary

Problems solved by technology

Hollow fiber membranes are generally cleanable and reusable. There are mainly two ways to restore the membrane flux of hollow fiber membranes: one is chemical cleaning, and the cleaning effect is achieved by soaking in chemicals and chemically reacting with the dirt on the membrane. This cleaning method is complicated, and the frequent use of chemicals has a certain impact on the service life of the membrane material, and it requires supporting facilities and has high requirements for the use environment. Therefore, chemical cleaning methods are mainly used in industrial engineering projects.

The other is a physical cleaning method, such as the cleaning method used in the patent with the authorized announcement number of CN201423368 and the patent with the application publication number of CN 101757855A. The pollutants attached to the membrane are flushed forward or reverse to make them fall off to achieve cleaning. effect, but this kind of cleaning effect is poor, the recovery percentage of membrane flux after cleaning is low, and it is difficult to meet the normal water demand