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A kind of treatment method of oil refining alkali residue

A treatment method and technology for oil refining alkali residues, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as the influence of stable operation of sulfur production system, and achieve good economic benefits , the effect of reducing processing costs, saving resources and energy

Active Publication Date: 2019-06-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tail gas produced during the acidification process contains a large amount of organic sulfides such as mercaptans. If it is sent to the sulfur production unit, it will have a great impact on the stable operation of the sulfur production system.

Method used

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  • A kind of treatment method of oil refining alkali residue

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Embodiment 1

[0034] Catalyzed gasoline soda residue in a refinery, in which COD is 3.21×10 5 mg / L, the sulfide is 1.76×10 4 mg / L, volatile phenol 1.07×10 5 mg / L. Use the method of the present invention to carry out acidification treatment, at first pass into gas acidification reagent SO 2 Carry out acidification, and blow off with a certain amount of nitrogen to control the N 2 and SO 2 The molar ratio is 1:30~1:40. When the pH value of the alkali slag in the acidification reactor is reduced to 13.5, stop adding the acidification reagent. At this time, the acidified tail gas produced by acidification is passed into the incinerator for incineration, and at the same time, combustion-supporting oxygen is passed into the incinerator, and the amount of oxygen introduced is not greater than the theoretical combustion oxygen demand of the acidified tail gas. The generated high-temperature acid gas first enters the acidification reactor to acidify the alkali slag. When the temperature of the ...

Embodiment 2

[0036] A refinery liquid hydrocarbon alkali slag, 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. Use the method of the present invention to carry out acidification treatment, at first pass into gas acidification reagent SO 2 Carry out acidification, and blow off with a certain amount of nitrogen to control the N 2 and SO 2 The molar ratio is 1:20~1:30, the pH value of the alkali slag in the acidification reactor is reduced to 13, and the addition of SO 2 . At this time, the acidified tail gas produced by acidification is passed into the incinerator for incineration, and at the same time, combustion-supporting oxygen is passed into the incinerator, and the amount of oxygen introduced is not greater than the theoretical combustion oxygen demand of the acidified tail gas. The generated high-temperature acid gas first enters the acidification reactor to acidify the alkali slag, and when the temperature of the alkali slag is higher than...

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Abstract

The invention discloses a processing method of oil refining alkaline residues. The processing method comprises the following steps: (1) adding a gas acidifying reagent into an acidification reactor, and stopping acidification when the pH value of alkaline residues reaches 13 to 14; (2) burning the acidification tail gas generated in the step (1) to obtain high temperature acidic gas; (3) returning the high temperature acidic gas to the acidification reactor to acidify the alkaline residues, heating, and burning the generated acidification tail gas like the step (2); (4) when the pH value of the alkaline residues is reduced to 7-8, stopping burning, adding a gas acidifying reagent to adjust the pH value to 2-6, and stopping acidification; (5) cooling the alkaline residues obtained in the step (4), carrying out settlement, and recovering the oil phase; (6) after oil phase recovery, adding alkaline residues into lime to carry out causticization regeneration. The provided processing method can efficiently remove sulfides, COD, phenol, and sulfite radicals in oil refining alkaline residues, the discharge of waste liquid is reduced, the waste gas generated in alkaline residue acidification is effectively utilized, the acidifying reagent and energy are utilized in a balance mode, the energy and resources are saved, and secondary pollution to the environment is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection wastewater treatment, and in particular relates to a treatment method for oil refining alkali residue. Background technique [0002] During the alkaline cleaning and refining process of oil products in refineries, alkaline waste liquid containing high concentrations of pollutants is produced, and the emissions of COD, sulfides and phenols account for more than 40% to 50% of the emissions of such pollutants in refineries. If these alkali slag waste liquids are discharged directly, they will seriously pollute the environment and severely corrode the equipment. In recent years, with the increasingly complete and strict national environmental protection regulations and standards, and people's calls for improving environmental quality, more and more attention has been paid to the treatment of alkali slag. [0003] At present, the commonly used methods of alkali slag treatment are main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C10G19/08
Inventor 刘志禹赵磊刘忠生王新王海波
Owner CHINA PETROLEUM & CHEM CORP