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

Method for cleaning metal oxides on ultrafiltration membrane

An ultrafiltration membrane and oxide technology, applied in the field of ultrafiltration membrane cleaning, can solve the problems of affecting the production progress, low production efficiency, easy to block ultrafiltration membrane, etc., and achieve the effect of prolonging the service life and improving the work efficiency.

Inactive Publication Date: 2012-02-15
太仓市金鹿电镀有限公司
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal oxides are very difficult to remove deposits, which can easily clog the ultrafiltration membrane, shorten the life of the ultrafiltration membrane, and need to be replaced frequently, seriously affecting the production schedule and resulting in low production efficiency

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for cleaning metal oxides on an ultrafiltration membrane, the steps of the cleaning method are as follows: (first deposit 1.7g of iron oxide on the ultrafiltration membrane)

[0022] (1) Use the cleaning pump to drive the product water from the cleaning tank into the ultrafiltration membrane and discharge it for 20 minutes;

[0023] (2) Prepare a cleaning solution; the mass parts of each component in the cleaning solution are as follows: 0.3g phosphoric acid, 1.0g sodium dithionite, 2.0g citric acid, 2.1g MCT103, 90g product water;

[0024] (3) Fill the cleaning solution into the cleaning tank, pump the cleaning solution into the ultrafiltration membrane with the cleaning pump, and circulate in the ultrafiltration membrane for 45 minutes;

[0025] (4) After cleaning, drain the cleaning liquid in the cleaning tank, and then rinse the cleaning tank with product water. After the cleaning tank is cleaned, fill the cleaning tank with product water;

[0026] (5) Use...

Embodiment 2

[0034] A method for cleaning metal oxides on an ultrafiltration membrane, the steps of the cleaning method are as follows: (first deposit 2.1g of copper oxide on the ultrafiltration membrane)

[0035] (1) Use the cleaning pump to drive the product water from the cleaning tank into the ultrafiltration membrane and discharge it for 22 minutes;

[0036] (2) Prepare a cleaning solution; the mass parts of each component in the cleaning solution are as follows: 0.6g phosphoric acid, 1.4g sodium dithionite, 2.2g citric acid, 2.2g MCT103, 91g product water;

[0037] (3) Fill the cleaning solution into the cleaning tank, pump the cleaning solution into the ultrafiltration membrane with the cleaning pump, and circulate in the ultrafiltration membrane for 55 minutes;

[0038] (4) After cleaning, drain the cleaning liquid in the cleaning tank, and then rinse the cleaning tank with product water. After the cleaning tank is cleaned, fill the cleaning tank with product water;

[0039] (5) U...

Embodiment 3

[0048] A method for cleaning metal oxides on an ultrafiltration membrane, the steps of the cleaning method are as follows: (first deposit 2.3g of nickel oxide on the ultrafiltration membrane)

[0049] (1) Use the cleaning pump to drive the product water from the cleaning tank into the ultrafiltration membrane and discharge it for 25 minutes;

[0050] (2) Prepare the cleaning solution; the mass parts of each component in the cleaning solution in the present invention are as follows: 0.7g phosphoric acid, 1.5g sodium dithionite, 2.5g citric acid, 2.5g MCT103, 94g product water;

[0051] (3) Fill the cleaning solution into the cleaning tank, pump the cleaning solution into the ultrafiltration membrane with the cleaning pump, and circulate in the ultrafiltration membrane for 60 minutes;

[0052] (4) After cleaning, drain the cleaning liquid in the cleaning tank, and then rinse the cleaning tank with product water. After the cleaning tank is cleaned, fill the cleaning tank with pro...

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 for cleaning metal oxides on an ultrafiltration membrane. The method comprises the following steps of: (1) pumping product water in the ultrafiltration membrane by using a cleaning pump, and discharging; (2) preparing a cleaning solution; (3) pumping the cleaning solution in the ultrafiltration membrane for circulating by using the cleaning pump; (4) draining the cleaning solution in a cleaning tank, and washing the cleaning tank by using the product water; (5) pumping the product water in the ultrafiltration membrane by using the cleaning pump, and discharging; (6) pumping the cleaning solution in the ultrafiltration membrane for circulating by using the cleaning pump; (7) draining the cleaning solution in the cleaning tank again, cleaning the cleaning tank by using the product water, and filling the product water into the cleaning tank; (8) performing back washing on the ultrafiltration membrane by using the product water in an ultrafiltration product water tank through a back washing pump; and (9) running an ultrafiltration system in the state of opening a product water discharge valve until the product water is clean. In the method, the metal oxides precipitated on the ultrafiltration membrane are cleaned by two-time cleaning, a reasonable washing method and the matching of a cleaning agent, the cleaning rate is over 90 percent, the service life of the ultrafiltration membrane is prolonged greatly, and the work efficiency of the ultrafiltration membrane is improved simultaneously.

Description

technical field [0001] The invention relates to a method for cleaning ultrafiltration membranes, in particular to a method for cleaning metal oxides on ultrafiltration membranes. Background technique [0002] The ultrafiltration membrane must be cleaned regularly during use to maintain a certain membrane permeation flux and prolong the life of the membrane. The cleaning method is generally determined according to the properties of the ultrafiltration membrane and the properties of the treated liquid. When cleaning, the product is usually cleaned by water first, and then different cleaning liquids are used for cleaning according to the situation, and the selection of cleaning liquid directly affects the use of the ultrafiltration membrane. life. Metal oxides are very difficult to remove deposits, which can easily clog the ultrafiltration membrane, shorten the life of the ultrafiltration membrane, and need to be replaced frequently, seriously affecting the production schedule...

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): B01D65/02B01D65/06
Inventor 支建明
Owner 太仓市金鹿电镀有限公司