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Pretreatment method for oily wastewater

A pretreatment and waste water technology, which is applied in the direction of water treatment parameter control, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems that affect the promotion of pyrolysis technology, difficult to treat oily waste water, etc., and achieve reduction Operating cost, the effect of reducing the oil content and COD of wastewater

Inactive Publication Date: 2019-10-22
杰瑞环境工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of pyrolysis treatment of oil sludge, a large amount of refractory oily wastewater will also be produced. At present, this wastewater has become a bottleneck affecting the promotion of pyrolysis technology.

Method used

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  • Pretreatment method for oily wastewater

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Experimental program
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Effect test

Embodiment 1

[0027] Firstly, the preparation of degreasing agent is carried out, taking 65% of montmorillonite, based on montmorillonite, adding 10% of alumina, 10% of silicon dioxide, 5% of calcium oxide, 3% of manganese oxide, 5% of magnesium oxide, After the 1% titanium is mixed and stirred evenly, 30% sulfuric acid is added for activation, and the activation temperature is 70°C. The activation time is 2 hours, and finally neutralized, rinsed and dried to obtain a degreasing agent. Use the degreasing agent to treat the oily wastewater in the oily wastewater pool 1. The oily wastewater passes through the oil separation treatment tank 2 to remove the slick oil, and then enters the degreasing sedimentation tank 3. In the deoiling sedimentation tank 3, add the degreasing agent , the dosage is 5g / L, and the treated supernatant enters the back-end process treatment 4; and the oil-removed sediment enters the sediment separation and recovery tank 5 for treatment after dehydration, and the water...

Embodiment 2

[0029] Firstly, the preparation of the degreasing agent is carried out, taking 50% of montmorillonite, based on montmorillonite, adding 15% of alumina, 15% of silicon dioxide, 8% of calcium oxide, 2% of manganese oxide, 2.5% of magnesium oxide, After 0.5% titanium is mixed and stirred evenly, 50% sulfuric acid is added for activation, and the activation temperature is 100°C. The activation time is 2.5 hours, and finally neutralized, rinsed and dried to obtain a degreasing agent. Use the degreasing agent to treat the oily wastewater in the oily wastewater pool 1. The oily wastewater passes through the oil separation treatment tank 2 to remove the slick oil, and then enters the degreasing sedimentation tank 3. In the deoiling sedimentation tank 3, add the degreasing agent , the dosage is 5g / L, and the treated supernatant enters the back-end process treatment 4; and the oil-removed sediment enters the sediment separation and recovery tank 5 for treatment after being dehydrated, a...

Embodiment 3

[0031] First of all, the preparation of degreasing agent is carried out, taking 70% of montmorillonite, based on montmorillonite, adding 20% ​​of alumina, 10% of silicon dioxide, 10% of calcium oxide, 1% of manganese oxide, 3% of magnesium oxide, After 0.1% titanium is mixed and stirred evenly, 20% sulfuric acid is added for activation, and the activation temperature is 120°C. The activation time is 1h, and finally neutralized, rinsed and dried to obtain a degreasing agent. Use the degreasing agent to treat the oily wastewater in the oily wastewater pool 1. The oily wastewater passes through the oil separation treatment tank 2 to remove the slick oil, and then enters the degreasing sedimentation tank 3. In the deoiling sedimentation tank 3, add the degreasing agent , the dosage is 5g / L, and the treated supernatant enters the back-end process treatment 4; and the deoiled sediment enters the sediment separation and recovery tank 5 for treatment after dehydration, and the water c...

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Abstract

The invention discloses a pretreatment method for oily wastewater. According to the invention, a degreasing agent is introduced, so the contents of oil and CODs in the wastewater can be significantlyreduced, and better conditions are created for subsequent treatment such as advanced oxidation and biochemical treatment; and at the same time, a produced degreasing precipitate can be sent to wastewater-producing thermal desorption for treatment so as to recover oil and the degreasing agent, so the recovery and repeated use of the waste oil and the degreasing agent are achieved, and the operatingcost of wastewater treatment is reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a pretreatment method for oily wastewater. Background technique [0002] Oil sludge is an oily solid waste produced in the process of oil exploration, mining, refining, tank cleaning, storage and transportation, and oily sewage treatment. Its composition is extremely complex, not only containing benzene series, phenols, anthracene, pyrene and other refractory organic substances, but also containing a large amount of flocculants, scale inhibitors, corrosion inhibitors and other water treatment chemicals added in the production process, and also Contains a large number of toxic and harmful substances such as pathogenic bacteria, heavy metals, and radioactive elements. According to a large number of studies, oil sludge is difficult to degrade naturally. If it cannot be disposed of properly and discharged at will, it will cause great harm to human health and the ecologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01D17/05C10G1/00C10G1/02C02F101/32C02F101/34
CPCB01D17/047C02F1/40C02F1/52C02F9/00C02F2001/007C02F2101/32C02F2101/34C02F2209/08C10G1/00C10G1/02
Inventor 徐辉王斯靖尹啊惠杨彬郑致力郭文辉姜志光
Owner 杰瑞环境工程技术有限公司