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Method for protecting tubular membrane element end face

A tubular membrane and end face technology, applied in the direction of chemical instruments and methods, membranes, membrane technology, etc., to achieve the effects of preventing fluid erosion, reducing use costs, and avoiding impact and erosion

Inactive Publication Date: 2016-10-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is: Based on the above problems, the present invention provides a method for protecting the end face of a tubular membrane element without changing the pore size, membrane area, number of membrane tube channels and size parameters of the membrane element. , to protect the end face of the tubular membrane element, thereby improving its corrosion resistance and mechanical strength, while avoiding membrane fouling caused by end face permeation, and ensuring the quality of the filtrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In tubular Al 2 o 3 The ceramic membrane element (average pore diameter 200nm, outer diameter 30mm, 19 channels, channel diameter 4mm, length 1100mm) is the membrane element to be treated. Mix the calcium borosilicate glass-based fusible glaze with water at a weight ratio of 100:30, and mill in a fast ball mill for 4 to 8 hours (the ratio of material to ball is 1:2), and the final powder particles are controlled below 300 mesh. Prepare a glaze solution with a concentration of about 65° Baume (preferably non-flowing glaze), and spray or rinse or dip it on the end surface of the ceramic membrane element. Insulate at 850-950°C for 10 minutes to sinter and set the shape. A ceramic membrane element with end face sealing, good acid resistance, temperature resistance and mechanical strength is obtained.

Embodiment 2

[0021] In tubular Al 2 o 3 The ceramic membrane element (average pore diameter 100nm, outer diameter 40mm, 37 channels, channel diameter 3mm, length 1100mm) is the membrane element to be treated. Use room temperature vulcanizing silicone rubber (RTV-1 silicone) as the end face protection material. Clean the grease, water, dust, and other impurities and pollutants on the end face of the membrane element; apply the glue solution to the cleaned surface to make it evenly distributed and penetrate into the inside of the support properly; clean the end face of the coated membrane element Place up in the air to cure naturally. A ceramic membrane element with end face sealing, good acid resistance, temperature resistance and end face toughness is obtained.

Embodiment 3

[0023] A tubular stainless steel membrane element (average pore diameter 200nm, outer diameter 15mm, single channel, channel diameter 10mm, length 1100mm) is used as the membrane element to be treated. Borosilicate glass is used as end face protection material. Remove grease, moisture, dust, and other impurities and pollutants from the end face of the membrane element; melt the borosilicate glass, and immerse the end face of the preheated stainless steel membrane element in the molten glass to make the end face dipped evenly, and Appropriately penetrate into the inside of the support body; cool down the impregnated membrane element. A stainless steel membrane element with end face sealing and good acid resistance and temperature resistance is obtained.

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Abstract

The invention relates to a method for protecting the end face of a tubular membrane element. The end face protection material is used as a raw material, and the end face protection material is partially infiltrated into the pores of the porous material on the end face of the tubular membrane element by a combination method, and the end face protection material is attached. A protective layer is formed on the end face of the tubular membrane element and the local surface close to the end face, and the appearance and morphology of the tubular membrane element after the end face protection treatment are subjected to secondary treatment by mechanical processing. The invention has the beneficial effects of preventing fluid erosion, improving the strength of the end face, preventing pollutants from directly entering the interior of the membrane element and filtrate through the large pores of the end face support layer, and repairing damaged membrane tubes.

Description

technical field [0001] The invention relates to a method for protecting the end face of a tubular membrane element. Background technique [0002] The tubular membrane element is a core component used in the membrane filtration process. It is generally composed of a support body, a transition layer and a membrane layer. Its filtration precision covers microfiltration, ultrafiltration, nanofiltration and other levels. Membrane elements are the key to the membrane separation process, and tubular membrane elements, as one of them, are widely used in the membrane filtration process. Using the principle of shape-selective screening, driven by the pressure difference on both sides of the membrane, the selective permeation of specific components in the fluid is realized, so as to achieve the purpose of separation, concentration and purification of the feed liquid. Inorganic tubular membrane elements have the advantages of high separation efficiency, high temperature resistance, hig...

Claims

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Application Information

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IPC IPC(8): B01D63/06
CPCB01D63/06B01D2313/23
Inventor 王龙耀陈秋霞王岚赵宇培陈群
Owner CHANGZHOU UNIV
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