Method capable of recovering filter performance of roll type membrane assemblies for household water purifiers

A technology of filtration performance and rolled membrane, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as poor effect

Pending Publication Date: 2018-12-25
JIANGSU CIKON ENVIRONMENTAL APPLIANCE CO LTD
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method is mainly applicable to the anti-clogging technology adopted to block the membrane by colloids and other pollutants that produce SDI in the water, but the effect is poor for water with more calcium and magnesium ions in the water that are easy to scale, so how to deal with this kind of water? To restore the filtration performance of spiral membrane modules, new technologies need to be developed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method capable of recovering filter performance of roll type membrane assemblies for household water purifiers
  • Method capable of recovering filter performance of roll type membrane assemblies for household water purifiers
  • Method capable of recovering filter performance of roll type membrane assemblies for household water purifiers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 Shown is a flowchart of a method for recovering the filtration performance of the roll-type membrane module used in a household water purifier according to the present invention, wherein the roll-type membrane module is arranged inside the membrane shell of the membrane processor of the water purifier, and the membrane The shell is provided with a water inlet, a water outlet and a concentrated water discharge port. The water inlet is connected to the inlet of the raw water flow channel inside the coiled membrane module, and the outlet of the raw water flow channel is connected to the concentrated water discharge port. The outlet of the outlet is connected to the water outlet, and the method includes the following steps:

[0040] Replacement step: After the spiral membrane module has been filtered for a period of time, some pollutants that block the membrane may be deposited on the surface of the raw water side of the membrane. The raw water and concent...

Embodiment 2

[0056] Such as Figure 4 Shown is a flow chart of another method of the present application that can restore the filtration performance of the roll-type membrane module on a household water purifier, wherein the roll-type membrane module is arranged inside the membrane shell of the membrane processor of the water purifier, The membrane casing is provided with a water inlet, a water outlet and a concentrated water discharge port. The water inlet is connected to the inlet of the raw water channel inside the coiled membrane module, and the outlet of the raw water channel is connected to the concentrated water discharge port. The clean water flow inside the coiled membrane module The outlet of the channel is connected to the water outlet, and the method includes the following steps:

[0057] Replacement and backwashing steps: After the spiral membrane module has been filtered for a period of time, some pollutants that block the membrane may be deposited on the surface of the raw w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method capable of recovering the filter performance of roll type membrane assemblies for household water purifiers. The method includes a displacement step: displacing raw water and concentrated water in raw water flow channels by displacement water and reducing the concentration of pollutants or minerals in water in the raw water flow channels; a soaking step: soaking the surfaces of membranes on raw water sides inside membrane shells in the displacement water after the raw water and the concentrated water are displaced; a pulse rinsing step: rinsing the raw water flow channels by pulse type water flow after the surfaces of the membranes are soaked in the displacement water. The displacement water for displacing the raw water and the concentrated water at the displacement step is purified water or pure water. Compared with the prior art, the method capable of recovering the filter performance of the roll type membrane assemblies for the household water purifiers has the advantages of applicability to recovering the filter performance of the membranes blocked by SDI (silt density index) pollutants due to a large quantity of colloid in the water and applicability to recovering the filter performance of the membranes blocked by calcium carbonate and magnesium carbonate which are deposited on the surfaces of the membranes due to high concentration of calcium and magnesium ions in the water.

Description

technical field [0001] The invention relates to the field of drinking water production, in particular to a method for restoring the filtration performance of a roll-type membrane module used in a household water purifier. Background technique [0002] Membrane water purifiers, especially traditional household reverse osmosis water purifiers, have a low water yield and a serious waste of water resources. In order to save water resources, my country promulgated the national mandatory standard GB34914-2017 "Water Efficiency Limits and Water Efficiency Grades of Reverse Osmosis Water Purifiers" (hereinafter referred to as water efficiency standards), encouraging enterprises to develop water-saving technologies for reverse osmosis water purifiers . In this standard, the water efficiency of reverse osmosis water purifiers is divided into grades 1 to 5, and the corresponding water purification rates are 60%, 55%, 50%, 45% and 35%. Water purification rate of 55% specified in effici...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02C02F1/44
CPCB01D65/02C02F1/441C02F1/442C02F2303/14B01D2321/10B01D2321/28B01D2321/2066B01D2321/04
Inventor 徐立农黄樟焱
Owner JIANGSU CIKON ENVIRONMENTAL APPLIANCE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap