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A kind of preparation method of TB ultrafiltration membrane, the treatment method of oily waste water

A technology of ultrafiltration membrane and scraping membrane, which is applied in osmosis/dialysis water/sewage treatment, ultrafiltration, separation methods, etc., can solve the problems of membrane fouling, reduced sewage treatment effect, membrane pore blockage, etc., to improve the retention rate, Good application prospect, the effect of reducing electrostatic force

Active Publication Date: 2021-05-07
ANHUI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In terms of membrane separation and treatment of oily wastewater, polytetrafluoroethylene (PTFE) microfiltration membranes were used to treat oil production wastewater, and the removal rate of oily substances (O / W) in wastewater reached 80.7%. Vinyl fluoride (PVDF) membrane is modified, and the obtained modified membrane can remove oil up to 90.8% of the oily sewage; the operating parameters of the ceramic membrane in the process of oilfield produced water treatment The water quality after treatment has an oily mass concentration of less than 1mg / L. Although the membrane separation method has a good performance in the treatment of oily sewage, there are still some problems in itself, mainly the problem of membrane fouling
If the membrane separation method is used to treat sewage for a long time, the pollutants trapped on the surface of the membrane will pollute the membrane itself, and the pollutants will easily block the membrane pores, resulting in a decrease in the effect of sewage treatment. Therefore, the membrane pores must be checked and cleaned regularly

Method used

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  • A kind of preparation method of TB ultrafiltration membrane, the treatment method of oily waste water
  • A kind of preparation method of TB ultrafiltration membrane, the treatment method of oily waste water
  • A kind of preparation method of TB ultrafiltration membrane, the treatment method of oily waste water

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Embodiment 1

[0039] A preparation method of TB ultrafiltration membrane, comprising the following steps:

[0040] 1) Synthesize TB polymer according to Polym.Chem.5(2014)5267-5272.

[0041] 2) Methylate the polymer TB prepared in step 1) and dimethyl sulfate according to the molar ratio of 1:0.5: weigh 12g (48.36mmol) of the polymer TB prepared in step 1), cut it into pieces with scissors and put Put into a 1000mL three-necked flask, add 440mL of diethyl ether and stir under ice bath conditions, add 2.3mL (24.29mmol) dimethyl sulfate into the three-necked flask with a pipette gun when the temperature drops to 4°C, remove the ice bath , when the temperature rises to room temperature, transfer it to an oil bath whose temperature has been stabilized at 30°C in a fume hood, and gradually increase the temperature. The reaction temperature should be kept at 35°C±1°C, and the reflux condenser tube is refluxed, and a balloon is placed on the condenser tube , to prevent ether from being evaporated...

Embodiment 2

[0047] TB and TB m Synthesis and M TBm+EGM The preparation is with embodiment 1;

[0048] The treatment method of oily waste water provided by the present invention utilizes the above-mentioned M prepared by the present invention TBm+EGM deal with. The membrane was pre-pressed at 1.5 bar for 30 minutes, and then operated at 1.0 bar for 30 minutes to obtain the initial pure water flux. Then filter with emulsified oil (1.0g / L) for 1h, rinse thoroughly with deionized water, and then measure the water flux of the washed membrane for 30min. The process of filtering the emulsified oil and backwashing the water is repeated three times. The quality of the permeate was weighed every 2 minutes with an electronic balance. With an effective membrane area of ​​35cm 2 The pure water flux of the membrane measured by the dead-end filtration membrane device is 140.45L / (m 2 h bar), M TBm+EGM The interception rate and anti-pollution of emulsified oil are 99.94% and 81.23% respectively. ...

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Abstract

The invention provides a preparation method of TB ultrafiltration membrane and a treatment method of oily wastewater. Compared with the prior art, the present invention reacts TB with dimethyl sulfate to obtain methylated TB, and then uses hydrogen to oxidize After sodium hydrolysis and ring opening, it is mixed with N-methylpyrrolidone and ethylene glycol monomethyl ether according to a certain ratio to form a casting solution to prepare a TB ultrafiltration membrane. The addition of EGM to the coating solution affects the phase separation thermodynamics and mass transfer kinetics of the casting solution membrane system, further improving the hydrophilicity of the membrane. The hydrophilic surface of the prepared base ultrafiltration membrane can combine water molecules to form an ordered water layer, thereby effectively reducing the electrostatic force between the membrane surface and protein molecules; at the same time, the polymer conformation will not change when the protein contacts the membrane surface, so Significantly reduced protein adsorption. It also has a very high interception rate for emulsified oil wastewater, which can reach 98.55%-99.64%, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of new material preparation, and specifically relates to a The invention discloses a preparation method of base ultrafiltration membrane and a treatment method of oily wastewater. Background technique [0002] Oily wastewater has the characteristics of large water volume, wide range of pollution, complex water quality and difficult biodegradation. Currently the most common oily wastewater methods can be generally divided into physical and chemical methods (mainly air flotation, adsorption and membrane separation), chemical methods (mainly flocculation and chemical oxidation, etc.) and biological methods (mainly active Sludge and biological filter method), etc., the process route is: oil separation - coagulation air flotation - aerobic biological treatment. With the continuous development of industrialization, the pollution is increasing day by day. Emulsified oil has stable physical and chemical properties, and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/58B01D69/02B01D67/00B01D61/14B01D61/40C02F1/40C02F1/44
Inventor 唐海张晨黄荣璐殷九龙李强张泽李南文
Owner ANHUI POLYTECHNIC UNIV
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