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Refining method for phenolic wastewater and equipment

A refining method and technology for phenolic wastewater, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as high risk of secondary pollution, achieve the effect of broadening recycling channels and increasing yield

Active Publication Date: 2018-11-06
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods basically involve the use of chemical and chemical materials such as oxygen, solvents, or catalysts. There are problems with the reprocessing of these materials, and the risk of secondary pollution during reprocessing is high.

Method used

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  • Refining method for phenolic wastewater and equipment
  • Refining method for phenolic wastewater and equipment
  • Refining method for phenolic wastewater and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] After pulverizing 300g polyethylene (PE) waste plastic to 0.1mm, fill it into a vacuum pyrolysis reactor, and then use vacuum pump suction to keep the pressure in the vacuum pyrolysis reactor at 5kPa and increase the temperature at a rate of 10℃ / min Start heating the waste plastics, and keep the final temperature at 500℃. The waste plastics are pyrolyzed to form steam. The pyrolysis gas passes through the dielectric barrier discharge type low-temperature plasma discharge reactor under the suction of the vacuum pump. The low-temperature plasma discharge reactor uses 15kV High voltage and 8kHz high frequency discharge the pyrolysis gas, and some ethylene molecules in the pyrolysis gas are activated and dissociated to produce CH 3 , CH 2 , CH, H and other highly active particle fragments, and then pass the pyrolysis gas rich in highly active substances into the 100mL bio-oil refined water phase, and contact with phenolic substances to remove their hydroxyl groups, and at the ...

Embodiment 2

[0054] After crushing 1000g of polypropylene (PP) waste plastic to 0.1mm, fill it into a vacuum pyrolysis reactor, and then use vacuum pump suction to maintain the pressure in the vacuum pyrolysis reactor at 15kPa, and increase the temperature at a rate of 50℃ / min Start heating the waste plastics, and keep the final temperature at 600℃. The waste plastics are pyrolyzed to form vapor. The pyrolysis gas passes through a dielectric barrier discharge type low-temperature plasma discharge reactor under the suction of a vacuum pump. The low-temperature plasma discharge reactor uses 20kV High voltage and 12kHz high frequency discharge the pyrolysis gas, and some ethylene molecules in the pyrolysis gas are activated and dissociated to produce CH 3 , CH 2 , CH, H and other high-active particle fragments, and then pass the pyrolysis gas rich in high-energy active substances into 300mL of the refined water phase of bio-oil, and contact with phenolic substances to remove their hydroxyl group...

Embodiment 3

[0061] The phenol reagent was added to pure water to prepare an aqueous solution containing phenol with a moderate concentration as the treatment object of the experiment.

[0062] After crushing 300g polyethylene (PE) and 300g polypropylene (PP) waste plastics to 0.1mm and mixing them, fill them into a vacuum pyrolysis reactor, and then use vacuum pump suction to keep the pressure in the vacuum pyrolysis reactor at 10kPa, and Start heating the waste plastic at a heating rate of 30°C / min, and keep the final temperature at 550°C. The waste plastic is pyrolyzed to form vapor. The pyrolysis gas passes through a dielectric barrier discharge type low-temperature plasma discharge reactor under the suction of a vacuum pump. The low-temperature plasma discharge reactor discharges the pyrolysis gas with a high voltage of 18kV and a high frequency of 10kHz. Part of the ethylene and propylene molecules in the pyrolysis gas are activated and dissociated to produce CH 3 , CH 2 , CH, H and othe...

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Abstract

The invention belongs to the field of biomass energy transformation and utilization and environmental protection, and relates to a refining method for phenolic wastewater and equipment. The method comprises the following steps: step 1, waste plastic is pulverized by a pulverizer, and 3-10 kg of the waste plastic is required for treating every liter of aqueous bio-oil or industrial wastewater; step2, vacuum pyrolysis treatment is performed in a vacuum pyrolysis reactor, and pyrolyzed vapor is obtained; vacuum pyrolysis pressure is 5-15k Pa, heating rate is 10-50 DEG C / min, and temperature is increased to 500-600 DEG C; step 3, vapor is activated by a low-temperature plasma discharge reactor, and a high-activity substance is obtained; discharge voltage of the low-temperature plasma discharge reactor during activation is 15-20 kV, and discharge frequency is 8-12 kHz; step 4, the high-activity substance is introduced into the aqueous bio-oil or industrial wastewater and subjected to a reaction with phenols. With adoption of the method, the waste plastic can be used for refining phenols in the industrial wastewater.

Description

Technical field [0001] The invention belongs to the field of biomass energy conversion and utilization and environmental protection, and relates to a refining method of industrial wastewater, more specifically to a refining method of an aqueous phase after bio-oil refining and separation, and in particular to a refining method and equipment of phenol-containing wastewater. Background technique [0002] Biomass energy is the only renewable energy that can be directly converted into carbon-containing liquid fuels. Its development and utilization have become increasingly important today when fossil fuels are increasingly depleted and the environment is deteriorating. Biomass pyrolysis oil (hereinafter referred to as bio-oil) as a primary fuel has obvious defects in physical and chemical properties and must be modified and refined to improve the quality of bio-oil. At present, the refined modification methods mainly include catalytic cracking, catalytic hydrogenation, and catalytic e...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F101/34
CPCC02F1/00C02F2101/345
Inventor 樊永胜陈玉炜严军熊永莲金丽珠
Owner YANCHENG INST OF TECH
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