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A method and equipment for refining phenol-containing wastewater

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: 2020-03-17
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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  • A method and equipment for refining phenol-containing wastewater
  • A method and equipment for refining phenol-containing wastewater
  • A method and equipment for refining phenol-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] After crushing 300g of polyethylene (PE) waste plastics to 0.1mm, fill it into the vacuum pyrolysis reactor, and then use the vacuum pump to keep the pressure in the vacuum pyrolysis reactor at 5kPa, and at a heating rate of 10°C / min Start to heat the waste plastics, and keep the final temperature at 500°C. The waste plastics are pyrolyzed to form steam. The pyrolysis gas passes through the low-temperature plasma discharge reactor of the dielectric barrier discharge type under the suction of the vacuum pump. The low-temperature plasma discharge reactor is powered by 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 water phase after 100mL of bio-oil refining, and react with phenolic substances to remove their hydroxyl groups a...

Embodiment 2

[0054] After crushing 1000g of polypropylene (PP) waste plastics to 0.1mm, fill it into a vacuum pyrolysis reactor, and then use a vacuum pump to maintain the pressure in the vacuum pyrolysis reactor at 15kPa, and at a heating rate of 50°C / min Start to heat the waste plastics, and keep the final temperature at 600°C. The waste plastics are pyrolyzed to form steam. The pyrolysis gas passes through the low-temperature plasma discharge reactor of the dielectric barrier discharge type under the suction of the vacuum pump. The low-temperature plasma discharge reactor is powered by 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 highly active particle fragments, and then pass the pyrolysis gas rich in high-energy active substances into the water phase after 300mL of bio-oil refining, and react with phenolic substances to remove their hydroxyl...

Embodiment 3

[0061] Add the phenol reagent into pure water to prepare a moderately concentrated phenol-containing aqueous solution 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 a vacuum pump to keep the pressure in the vacuum pyrolysis reactor at 10kPa, and Start heating waste plastics at a heating rate of 30°C / min, and keep the final temperature at 550°C. Waste plastics are pyrolyzed to form steam, and the pyrolysis gas passes through a low-temperature plasma discharge reactor of a dielectric barrier discharge type 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 other highly ...

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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 method for refining industrial wastewater, more specifically to a method for refining the water phase after bio-oil refining and separation, and in detail to a method and equipment for refining wastewater containing phenol. Background technique [0002] As the only renewable energy that can be directly converted into carbon-containing liquid fuels, biomass energy is becoming more and more important for its development and utilization today when fossil fuels are depleted and the environment is deteriorating. As a primary fuel, biomass pyrolysis oil (hereinafter referred to as bio-oil) has obvious defects in physical and chemical properties, so it must be modified and refined to improve the quality of bio-oil. At present, the refining modification methods mainly include catalytic cracking, catalytic hydrogenation, and catalytic e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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