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A method for advanced treatment of oil refining alkali slag

A technology for refining alkali residue and advanced treatment, which is applied in the fields of natural water treatment, chemical instruments and methods, and multi-stage water/sewage treatment. The effect of easy equipment manufacturing industrialization and easy stereotyping

Active Publication Date: 2019-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkali slag treated by this method still has a high COD content after treatment, and the small molecular organic matter in the alkali slag cannot be deeply removed.

Method used

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  • A method for advanced treatment of oil refining alkali slag
  • A method for advanced treatment of oil refining alkali slag
  • A method for advanced treatment of oil refining alkali slag

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Catalytic gasoline alkali slag in a refinery, where COD is 3.21×10 5 mg / L, sulfide is 1.76×10 4 mg / L, volatile phenol 1.07×10 5 mg / L. The method of the present invention is used for treatment. Firstly, hydrochloric acid is introduced for acidification, and a certain amount of air is introduced for blowing off. At the same time, the stirrer is turned on. When the pH value of the alkali residue in the reactor drops to 7, the addition of hydrochloric acid is stopped. When the acidification process is completed, the motor and the blowing of inert gas are turned off, the acidified alkali residue is allowed to stand, and the oil phase on the liquid surface is cut out to the outside of the reactor. The negative pole of the DC power supply is connected to the stirrer, and the positive pole of the power supply is connected to the Ti-PbO of the reactor 2 The electrodes are connected. Of which Ti-PbO 2 The electrode adopts the method of electrodeposition, and a layer of PbO is depo...

Embodiment 2

[0040] Liquid hydrocarbon alkali residue of a refinery, in which COD is 7.97×10 4 mg / L, sulfide is 4×10 3 mg / L, volatile phenol 1.4×10 4 mg / L. The method of the present invention is used for treatment. Firstly, hydrochloric acid is introduced for acidification, and a certain amount of air is introduced for blowing off. At the same time, the stirrer is turned on. When the pH value of the alkali residue in the reactor drops to 7, the addition of hydrochloric acid is stopped. When the acidification process is completed, the motor and the blowing of inert gas are turned off, the acidified alkali residue is allowed to stand, and the oil phase on the liquid surface is cut out to the outside of the reactor. The negative pole of the DC power supply is connected to the stirrer, and the positive pole of the power supply is connected to the Ti-PbO of the reactor 2 The electrodes are connected. Of which Ti-PbO 2 The electrode adopts the method of electrodeposition, and a layer of PbO is de...

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Abstract

The invention discloses a deep processing method for oil refining alkaline residues. The method includes the steps of: 1) acidifying the oil refining alkaline residues with hydrochloric acid as an acidification reagent until pH reaches 6-7; 2) performing oil water separation to the acidified liquid in the step 1) to remove oil-phase substances, such as volatile phenols and the like, generated during the acidification; 3) performing electric-chemical treatment to the acidified alkaline residue wastewater generated in the step 2), wherein a negative pole of electric-chemical treatment is made of stainless steel and Ti-PbO2 is used as a positive pole, and adding hydrochloric acid to maintain the pH of the wastewater to be 2-6. The treated alkaline residue waste liquid satisfies emission requirement. In the method, the treated alkaline residue waste liquid is treated through combination of acidification and electric-chemical treatment, so that COD and sulfides in the alkaline residue waste liquid can be removed high-effectively, thereby achieving deep processing of the alkaline residue waste liquid.

Description

Technical field [0001] The invention belongs to the technical field of environmental wastewater treatment, and specifically relates to an advanced treatment method for oil refining alkali residue. Background technique [0002] In the process of caustic washing and refining of oil in the refinery, alkaline waste liquid with high concentration of pollutants is produced, and the discharge of COD, sulfide and phenol accounts for more than 40%-50% of the discharge of such pollutants in the refinery. These alkaline slag waste liquids, if directly discharged, will seriously pollute the environment and severely corrode equipment. In recent years, as national environmental protection regulations and standards have become more complete and strict, and people's calls for improving environmental quality have increased, the treatment of alkali slag waste liquid has received more and more attention. [0003] At present, the commonly used alkali residue treatment methods are mainly neutralizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G19/08C02F9/06
CPCC02F1/24C02F1/46C02F2103/365
Inventor 刘志禹赵磊刘忠生王新王海波
Owner CHINA PETROLEUM & CHEM CORP
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