Unlock instant, AI-driven research and patent intelligence for your innovation.

An anti-biological fouling filter element and security filter

A security filter and filter element technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage treatment equipment, etc., can solve the problem of biological fouling that cannot protect reverse osmosis systems, biological fouling of filter elements, and the decline of water quality. and other problems, to achieve the effect of solving the problem of being susceptible to biological fouling, simple structure and good killing effect.

Active Publication Date: 2022-01-04
TSINGHUA UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The decrease of membrane flux and the decrease of product water quality caused by membrane fouling are the main problems that limit the stable operation of reverse osmosis process.
Studies have shown that biofouling caused by microorganisms is an important cause of reverse osmosis fouling. A security filter is usually installed before the reverse osmosis device to retain pollutants such as particulate matter in the water to protect the reverse osmosis membrane. However, the existing The filter element of the security filter has almost no interception effect on microorganisms, and cannot protect the reverse osmosis system from biofouling. At the same time, the filter element of the security filter itself often occurs biofouling.

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
  • An anti-biological fouling filter element and security filter
  • An anti-biological fouling filter element and security filter
  • An anti-biological fouling filter element and security filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the anti-biofouling filter element 1 provided by the present invention is a hollow cylindrical structure, including a porous support layer 11 and an electrode filter layer 12 stacked from the inside to the outside, the porous support layer 11 is cylindrical, and the electrode filter layer 12 includes Covered on the outer circumference of the support layer, it is composed of porous anode 121, porous electrode separator 122 and porous cathode 123 laminated from the inside to the outside. The porous anode and the porous cathode are respectively connected to the positive and negative electrodes of the power supply through wires. 1-5V, preferably 2-3V, the porous anode 121 and the porous cathode 123 are both made of conductive materials, the porous support layer 11 and the porous electrode separator 122 are made of insulating materials.

[0029] Specifically, the wire can be fixed on the upper end or the lower end of the filter core, and the wire i...

Embodiment 2

[0035]In the combined unit of single cathode paired with single anode provided in Example 1, when the influent flow rate becomes larger, the hydroxide ion accumulation efficiency of the cathode becomes lower, loses the advantage of the rear anode, and its disinfection effect becomes worse. In order to solve For this technical problem, this embodiment provides a combined unit form using multiple cathodes paired with a single anode. After multi-layer cathode treatment, the generated strong alkaline treatment liquid will flow into the anode, and microorganisms are very easy to directly oxidize under alkaline conditions. The reaction can realize the complete inactivation of microorganisms under low voltage ((1-5V). This unit setting method makes the unit disinfection ability significantly improved, greatly shortens the hydraulic retention time of the unit, and can effectively avoid excessive oxidation or fragmentation of microorganisms. The resulting waste of energy and subsequent ...

Embodiment 3

[0038] On the basis of embodiment 1 and embodiment 2, in order to improve the effective treatment water capacity of filter element, can be provided with multiple groups (at least two groups) electrode filter layer 12 on the outside of porous support layer 11, as image 3 As shown, the more the number of electrode filter layers used, the greater the amount of water that can be effectively treated, and the adjacent two groups of electrode filter layers 12 are separated by porous electrode separators 122, preferably 2-4 groups of electrode filter layers, each The electrode group filter layer can adopt the combined form of a single cathode paired with a single anode, and can also adopt the combined form of a multi-cathode paired with a single anode.

[0039] The filtration method using any of the above filter elements is as follows: control the flow rate of the water sample to be treated between 40-60L / min, make the water sample first contact the porous cathode of the electrode fil...

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
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an anti-biological fouling filter element and a security filter. The filter element is a hollow cylinder structure, including a porous support layer and an electrode filter layer stacked from the inside to the outside. The porous support layer is cylindrical, and the electrode filter layer Layers are covered on the outer circumference of the support layer, including porous anodes, porous electrode separators and porous cathodes stacked from the inside to the outside. The porous anodes and porous cathodes are respectively connected to the positive and negative electrodes of the power supply. Both the porous anodes and the porous cathodes are made of conductive materials. The porous support layer and the porous electrode interlayer are made of insulating materials; the security filter adopts the above-mentioned filter element. The invention can effectively kill microorganisms in water without adding any chemical reagents, and only needs extremely low voltage to realize high-standard disinfection with high disinfection efficiency, which can effectively solve the problem that security filters are susceptible to biological fouling, and Protect the back-end reverse osmosis unit from biofouling.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to an anti-biological fouling filter core and a security filter with the filter core. Background technique [0002] The decrease of membrane flux and the decrease of product water quality caused by membrane fouling are the main problems that limit the stable operation of reverse osmosis process. Studies have shown that biofouling caused by microorganisms is an important cause of reverse osmosis fouling. A security filter is usually installed before the reverse osmosis device to retain pollutants such as particulate matter in the water to protect the reverse osmosis membrane. However, the existing The filter element of the security filter has almost no interception effect on microorganisms, and cannot protect the reverse osmosis system from biofouling. At the same time, the filter element of the security filter itself often occurs biofouling. Contents of the invention [0003] In or...

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 Patents(China)
IPC IPC(8): C02F1/467
CPCC02F1/46104C02F1/46109C02F1/467C02F1/4672C02F2201/46105C02F2001/46161C02F2303/04
Inventor 巫寅虎胡洪营刘海倪欣业
Owner TSINGHUA UNIV