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Antifouling modified walnut shell filter material as well as preparation method and application thereof

A walnut shell and filter material technology, which is applied in the field of antifouling modified walnut shell filter material and its preparation, can solve the problems of material running, poor backwash effect, filter damage, etc., achieve simple equipment and process, and improve dispersion effect , the effect of not easy oil stain adhesion

Active Publication Date: 2019-04-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the walnut shell filter material has a strong adsorption and interception ability in the initial stage of filtration, the adherence of the adsorbed oil to the surface of the filter material will cause the filter material to bond and reduce the filtration channels, resulting in a decrease in the filter's dirt interception capacity and poor filtration effect. Poor, poor backwashing effect
Over time, the walnut shell filter material agglomerates, causing damage to the internal structural parts of the filter, and the phenomenon of running out of material occurs

Method used

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  • Antifouling modified walnut shell filter material as well as preparation method and application thereof
  • Antifouling modified walnut shell filter material as well as preparation method and application thereof
  • Antifouling modified walnut shell filter material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0022] (1) At room temperature, wash the walnut shell filter material with clean water 3 times to remove surface dust and impurities, and dry for later use; (2) Respectively 0.5g of SiO with a particle size of 10-40nm and 1μm 2 Nano particles and 0.5g KH-550 are dispersed in 40g water and stirred to form a uniform mixed solution; (3) 0.5g water-based fluorocarbon resin, 0.5g water-based epoxy resin and 0.5mg tripolyphosphoric acid are added to the above-mentioned mixed solution. 0.5mg polyvinyl alcohol, mix well to obtain the required modification solution; (4) Add 20g of the washed walnut shell filter material to the obtained modification solution, and after mechanical stirring for 2h at 800r / min The modified walnut shell filter material can be obtained by drying for 8 hours at 60°C. figure 1 In order to modify the super-hydrophilic process of the walnut shell in the air, it can be seen from the figure that the water droplets spread out as soon as they touch the surface of the w...

Embodiment 2

[0024] (1) At room temperature, scrub the walnut shell filter material with water for 5 times to remove surface dust and impurities, and dry for later use; (2) Respectively add 1g of SiO with a particle size of 10-40nm and 1μm 2 Disperse nanoparticles and 1g KH-570 in 60g water, stir them to form a uniform mixed solution; (3) Add 1g water-based acrylic resin, 1g water-based polyvinyl alcohol resin, 0.5mg tripolyphosphoric acid, 0.5mg polypropylene to the above-mentioned mixed solution After mixing, the required modification solution is obtained; (4) 30g of the washed walnut shell filter material is added to the obtained modification solution, and it is mechanically stirred for 2h at a speed of 600r / min and then placed at 80℃ After drying for 5 hours, the modified walnut shell filter material can be obtained. Figure 4 Scanning electron micrograph of modified walnut shell surface morphology. It can be seen from the figure that the surface is coated with resin and SiO 2 The partic...

Embodiment 3

[0026] (1) At room temperature, wash the walnut shell filter material with clean water 5 times to remove surface dust and impurities, and dry for later use; (2) Respectively 1g of TiO with a particle size of 100-200nm and 1μm 2 Nanoparticles and 2g KH-570 are dispersed in 60g water and stirred to form a uniform mixed solution; (3) Add 1g water-based polyurethane resin, 1g water-based fluorosilicone resin, 0.5mg sodium pyrophosphate, 0.5mg polyacrylamide to the above-mentioned mixed solution After mixing, the required modification solution is obtained; (4) 40g of washed walnut shell filter material is added to the obtained modification solution, stirred at 600r / min for 2h, and dried at 60℃ for 5h , The modified walnut shell filter material can be obtained. Oilfield oily sewage treatment equipment such as Figure 5 As shown in (a), the inner diameter of the glass tube is 3cm, and the filling height of the filter material is 5cm. The device is used to filter 0.5L of oily sewage, a...

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Abstract

An antifouling modified walnut shell filter material as well as preparation method and application thereof are disclosed, and the method is as follows: washing a walnut shell filter material with water, and drying for later use; dispersing hydrophilic micro-nano particles and a silane coupling agent into water, and stirring to obtain a mixed solution; adding water-based resin and an assistant intothe mixed solution, and uniformly stirring and uniformly mixing to obtain a required modifying solution; and adding the cleaned walnut shell filter material into the modifying solution, stirring, filtering, and drying to obtain the antifouling modified walnut shell filter material. According to the invention, the surface modification is adopted, and the contact angle of the walnut shell filter material to water and oil in air is 0 degree, so that the antifouling modified walnut shell filter material has superhydrophilicity and superoleophylic property, has super-oleophobic property at underwater, and has the characteristic of low adhesion to oil drops, so that the anti-fouling property is achieved, the filtering effect is optimized, and the backwashing capability is improved.

Description

Technical field [0001] The invention belongs to the field of oily sewage treatment, in particular to the field of hydrophilic water-based oleophobic coatings, and particularly relates to an antifouling modified walnut shell filter material and a preparation method and application thereof. Background technique [0002] Walnut shell filter material, as a kind of waste renewable resource, is used as the filling filter material of the oil-water separator due to its high hardness, abrasion resistance, good pressure resistance, stable chemical performance, strong adsorption and interception ability and wide sources. Widely used in oilfield oily sewage treatment, industrial wastewater treatment and civil water treatment and other fields, it is a new generation of filter material that replaces quartz sand filter media, improves water quality, and greatly reduces water treatment costs. Although the walnut shell filter material has a strong adsorption and interception capacity in the init...

Claims

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Application Information

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IPC IPC(8): B01D39/02C02F1/28C02F101/32C02F103/10
CPCB01D39/02B01D2239/0421B01D2239/0471B01D2239/10B01D2239/1291C02F1/286C02F2101/32C02F2103/10
Inventor 张友法陈普朱海燕余新泉
Owner SOUTHEAST UNIV
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