A magnetic filtration process and device for removing hydrocarbon-based pollutants in wastewater

A magnetic filtration and pollutant technology, applied in water pollutants, filtration treatment, water/sewage treatment, etc., can solve the problems of high cost of activated carbon, inability to reuse, etc., to solve difficult removal, increase high-efficiency removal effect, cost reduction effect

Inactive Publication Date: 2019-01-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, there is a method of adding activated carbon, but the cost of activated carbon is too high, and it cannot be reused

Method used

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  • A magnetic filtration process and device for removing hydrocarbon-based pollutants in wastewater
  • A magnetic filtration process and device for removing hydrocarbon-based pollutants in wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A magnetic filtration process for removing hydrocarbon-based pollutants in wastewater, including the steps of magnetic filtration, backwashing, magnetic powder recovery, and high-temperature catalytic regeneration; the specific process is:

[0034] 1) Magnetic filtration: a. Add 30 g of decane to 200 ml of distilled water and stir, adjust the pH to 3.5 with hydrochloric acid, then place 100 ml of the obtained water sample in beaker A, and put the other half in beaker B, respectively as Wastewater sample A and wastewater sample B;

[0035] b. Use the preloading method to fix the magnetic powder into the homogeneous filter material layer of the magnetic filter device (the particle size of the homogeneous filter material is 3mm). The specific method is: add tap water mixed with magnetic powder into the water inlet pool, Add 0.01g of magnetic powder per 1L of tap water for pre-fixation, and then control the feeding speed to 5m 3 / h, fix the magnetic powder in the homogeneo...

Embodiment 2

[0042] The difference between this embodiment and embodiment 1 is:

[0043] 1) Magnetic filtration:

[0044] a. The wastewater pH is pre-adjusted to 3.0;

[0045] b. The particle size of the homogeneous filter material is 2mm; add tap water mixed with magnetic powder into the water inlet pool, and add 0.012g of magnetic powder per 1L of tap water for pre-fixation, and then control the feeding speed to 4m 3 / h, fix the magnetic powder in the homogeneous filter material layer;

[0046] c. Use the magnetic powder dosing tube to add 2g of magnetic powder and 100mL of waste water to mix in the suspension tank, and then flow into the homogeneous filter material layer pre-loaded with magnetic powder from the suspension tank for filtration, with a filtration rate of 9m / h;

[0047] 2) Backwashing: water flushing intensity 6L / s.m 2 , air impact strength 14L / s.m 2 , Backwashing time: single air flushing 3min, air-water combined backflushing 3min, separate water flushing 3min; flushin...

Embodiment 3

[0051] The difference between this embodiment and embodiment 1 is:

[0052] 1) Magnetic filtration:

[0053] a. The pH of the wastewater is pre-adjusted to 4.0;

[0054] b. The particle size of the homogeneous filter material is 3mm; add tap water mixed with magnetic powder into the water inlet pool, add 0.015g of magnetic powder per 1L of tap water for pre-fixation, and then control the feeding speed to 6m 3 / h, fix the magnetic powder in the homogeneous filter material layer;

[0055] c. Use the magnetic powder dosing tube to add 3g of magnetic powder and 100mL of waste water to mix in the suspension tank, and then flow into the homogeneous filter material layer pre-loaded with magnetic powder from the suspension tank for filtration. The filtration rate is 12m / h;

[0056] 2) Backwash: water flushing intensity 7L / s.m 2 , air impact intensity 15L / s.m 2 , Backwashing time: single air flushing 4min, combined air-water backflushing 4min, single water flushing 3min; flushing c...

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Abstract

The invention discloses a magnetic filtering process for removing alkyl pollutants in waste water. The magnetic filtering process is characterized by comprising steps as follows: magnetic filtration, back flushing, magnetic powder recovery and high-temperature catalytic regeneration and comprises specific steps as follows: 1) magnetic filtration: magnetic powder is fixed in a homogeneous filtering medium layer with a pre-loading method, waste water and the magnetic powder are mixed and filtered through the homogeneous filtering medium layer pre-loaded with the magnetic powder, and the waste water with alkyl pollutants removed and the homogeneous filtering medium layer after magnetic filtering are obtained; 2) back flushing: the homogeneous filtering medium layer obtained in the step 1) after magnetic filtering is subjected to back flushing, and a water solution containing the magnetic powder is obtained; 3) magnetic powder recovery: the magnetic powder in the water solution containing the magnetic powder and obtained in the step 2) is adsorbed and recovered by means of a magnet; 4) high-temperature catalytic regeneration: the magnetic powder obtained in the step 3) is subjected to high-temperature catalytic regeneration. Traditional homogeneous filtering medium filtering is combined with magnetic filtering, the filtering reliability is guaranteed, the efficient removal effect on alkyl substances in water is improved, and the problem of difficulty in removal of alkyl substances is solved.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a magnetic filtration process and a device for removing hydrocarbon-based pollutants in waste water. Background technique [0002] In the engineering practice of water treatment, dealing with high-concentration hydrocarbons has always been one of the difficult problems in wastewater purification. Conventional treatment technologies cannot meet the relevant discharge standards of wastewater, while the traditional SBR, hydrolytic acidification and other processes are difficult to resist impact loads and sludge bulking problems. [0003] The traditional treatment of wastewater containing high hydrocarbons generally adopts biological technology such as SBR method and hydrolysis acidification method. The SBR process is simple, does not require a secondary settling tank, and is not easy to generate sludge bulking, but its shock load resistance is poor. However, the hydrolytic acidification ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/48C02F1/00C02F101/32
CPCC02F1/001C02F1/48C02F1/488C02F2101/32C02F2303/16
Inventor 李孟冯晟丁京楠包宇飞
Owner WUHAN UNIV OF TECH
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