Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Spiral-wound membrane element

A roll-type membrane and element technology, which is applied in the field of membrane elements, can solve the problems of restricting the permeate flux of membrane elements, and achieve the effects of improving the permeate flux, prolonging the service life, and being easy to popularize and use.

Pending Publication Date: 2018-10-16
NANJING DELNAMEM TECH CO LTD
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, when the membrane element is used under high pressure, the influence of the pressure is not obvious, but when the membrane element is used at a low pressure, this part of the resistance will restrict the water flux of the membrane element

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
  • Spiral-wound membrane element
  • Spiral-wound membrane element
  • Spiral-wound membrane element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as Figure 1 to Figure 4 As shown, this embodiment provides a roll-type membrane element, including a central water production pipe 1, and at least one set of water purification membranes 2 wound on the central water production pipe; the water purification membranes 2 include a production Water diversion net 5, two separation membranes 3 and a raw water diversion net 4, the two separation diaphragms 3 are self-made membranes with a length of 1m and a width of 0.32m folded in half; the inside of the two separation diaphragms 3 Between the surfaces is a raw water flow channel 14, and between the outer surfaces of the two separation membranes 3 is a water production flow channel 11; the raw water diversion net 4 is arranged in the raw water flow channel 14, with a thickness of 0.5 mm, a length of 51 cm, and a width of is 0.32m; the water production diversion net 5 is arranged in the water production flow channel 11; the central water production pipe 1 is provided with...

Embodiment 2

[0029] See Figure 5 , this embodiment is basically the same as Embodiment 1, the difference is that the length of the new water-producing diversion net 5 in this embodiment is four-fifths of the length of the original water diversion net 4, and the width is 4 / 5 of the original water diversion net 4. Half of the width of the flow net 4, the newly added water production diversion net 5 is placed in the middle of the central water production pipe 1, and the side is connected with the central water production pipe 1.

[0030] The test conditions of the coiled membrane element of the present embodiment are as follows:

[0031] The membrane element conventionally rolled by the above-mentioned water purification membrane group was tested under the conditions of 0.2Mpa, 200ppm sodium chloride solution, and 35% recovery rate. The efficiency is 95%; after the membrane element has been improved and implemented in this scheme, it is tested under the same conditions, and the purified wat...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Lengthaaaaaaaaaa
Widthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a spiral-wound membrane element. The spiral-wound membrane element comprises a central water producing pipe and at least one water purifying diaphragm group, wherein each waterpurifying diaphragm group comprises a water producing diversion net, two separating diaphragms and a raw water diversion net; a raw water flowing channel is formed between inner side surfaces of thetwo separating diaphragms; a water producing flow channel is formed between the outer side surfaces of the two separating diaphragms; the raw water diversion net is arranged in the raw water flow channel; the water producing diversion net is arranged in the water producing flow channel. According to the spiral-wound membrane element disclosed by the invention, under the condition that other conditions are identical with those of a traditional scheme, the thickness of the water producing diversion net is transversely distributed in a gradient manner, the water producing diversion net close to the central water producing pipe is thick, the diversion net far away from the central water diversion net is thin, and the thickness of the water producing diversion net at the central water producingpipe is increased, so that a water purifying channel is facilitated, the resistance of purified water entering the central water producing pipe is reduced, and further the water producing flux of themembrane element is improved; the spiral-wound membrane element particularly has an obvious effect on flux improvement on a low-pressure and ultra-low pressure membrane.

Description

technical field [0001] The invention relates to a membrane element and belongs to the technical field of filters in water purification devices. Background technique [0002] The principle of membrane filtration is the sieving process using the pore size of the membrane. The pressure difference on both sides of the membrane is used as the driving force, and the membrane is used as the filter medium. The raw liquid flows through the membrane surface under a certain pressure. The micropores on the membrane surface only allow Water and small molecular substances pass through to become the permeate, while the substances in the raw solution whose particle size is larger than the micropores on the membrane surface are trapped on the liquid inlet side of the membrane and become the concentrated solution, realizing the separation and concentration of the raw solution. [0003] At present, the widely used membrane filtration application method is roll membrane. The roll membrane eleme...

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
IPC IPC(8): B01D63/00B01D61/02B01D61/14C02F1/44
CPCB01D61/025B01D61/027B01D61/145B01D63/00C02F1/44C02F1/441C02F1/442C02F1/444B01D2313/08B01D2313/04
Inventor 武少禹刘星
Owner NANJING DELNAMEM TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com