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A processing system and method for petrochemical alkali slag

A treatment method and technology of a treatment system, applied in the field of petrochemical alkali residue waste liquid treatment, can solve the problems of high energy consumption, complex treatment method, poor economy, etc., and achieve the effect of reducing environmental pollution and saving investment.

Active Publication Date: 2022-02-25
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a treatment system and treatment method for petrochemical alkali slag waste liquid, to solve the technical problems of the existing petrochemical alkali slag treatment methods are complex, energy consumption is generally poor in economy and environmental protection

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  • A processing system and method for petrochemical alkali slag

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Effect test

Embodiment 1

[0079] The liquid hydrocarbon alkali slag of a petrochemical enterprise, in which the COD is 4.13×10 5 mg / L, 0.1wt% volatile phenols, 3.6wt% sodium methyl mercaptide, Na 2 S is 0.2wt%, and the pH value is 11.67.

[0080] Using the present invention figure 1 According to the method shown, the liquid hydrocarbon alkali slag to be treated is added to the reaction tank, the flue gas of the sintering machine is passed into the reaction tank, and the temperature of the alkali residue in the first reactor (reaction tank) is adjusted by controlling the flue gas flow rate The temperature is 85°C, and the acidification reaction time is controlled to be 100min. During the acidification process, sodium naphthenate, sodium phenolate, and sodium sulfide in the alkali slag are converted into sodium carbonate, naphthenic acid, and phenol, and hydrogen sulfide is oxidized to generate SO 2 The gas enters the sintering flue gas treatment device. Add sintered desulfurization ash to the acidifi...

Embodiment 2

[0083] The liquid hydrocarbon alkali slag of a petrochemical enterprise, in which the COD is 4.13×10 5 mg / L, 0.1wt% volatile phenols, 3.6wt% sodium methyl mercaptide, Na 2 S is 0.2wt%, and the pH value is 11.67.

[0084] Using the present invention figure 1 According to the method shown, the liquid hydrocarbon alkali slag to be treated is added to the reaction tank, the flue gas of the sintering machine is passed into the first reactor (reaction tank), and the temperature of the alkali residue in the reaction tank is adjusted by controlling the flue gas flow rate The temperature is 90°C, and the acidification reaction time is controlled to be 110min. During the acidification process, sodium naphthenate, sodium phenate, and sodium sulfide in the alkali slag are converted into sodium carbonate, naphthenic acid, and phenol, and hydrogen sulfide is oxidized to generate SO 2 The gas enters the sintering flue gas treatment device. Add sintered desulfurization ash to the acidified...

Embodiment 3

[0087] The liquid hydrocarbon alkali slag of a petrochemical enterprise, in which the COD is 4.13×10 5 mg / L, 0.1wt% volatile phenols, 3.6wt% sodium methyl mercaptide, Na 2 S is 0.2wt%, and the pH value is 11.67.

[0088] Using the present invention figure 1 According to the method shown, the liquid hydrocarbon alkali slag to be treated is added to the first reactor (reaction tank), the flue gas of the sintering machine is passed into the reaction tank, and the temperature of the alkali residue in the reaction tank is adjusted by controlling the flue gas flow rate The temperature is 95°C, and the acidification reaction time is controlled to be 120min. During the acidification process, sodium naphthenate, sodium phenate, and sodium sulfide in the alkali slag are converted into sodium carbonate, naphthenic acid, and phenol, and hydrogen sulfide is oxidized to generate SO 2 The gas enters the sintering flue gas treatment device. Add sintered desulfurization ash to the acidified...

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Abstract

The invention relates to a treatment system and method for petrochemical alkali slag, which belongs to the technical field of petrochemical alkali slag treatment, and solves the technical problems that the existing petrochemical alkali slag treatment method is complicated, energy consumption is generally poor in economy, and poor in environmental protection. The treatment system includes a sintering flue gas acidification unit, a desulfurization ash calcification unit, and a sintering machine detoxification unit connected in sequence; the sintering flue gas acidification unit is connected with the sintering flue gas main pipeline, and the sintering flue gas acidification unit is also connected with the sintering flue gas treatment system; Pass the petrochemical alkali slag into the sintering flue gas acidification unit for acidification treatment; the desulfurization ash calcification unit is used for calcification of the acidified waste liquid; the calcification product is separated from solid and liquid, and the solid precipitate is sent to the lime kiln, and the alkali slag is The liquid is sent to the detoxification unit of the sintering machine; the detoxification unit of the sintering machine is used for high-temperature detoxification of neutral oil and organic acid substances remaining in the alkali slag liquid. The invention achieves 100% treatment of petrochemical alkali slag and realizes the goal of zero discharge.

Description

[0001] The invention relates to the technical field of petrochemical alkali slag waste liquid treatment, in particular to a treatment system and method for petrochemical alkali slag waste liquid. Background technique [0002] Gasoline, diesel, liquefied petroleum gas and other products produced by the petroleum processing industry contain many acidic non-hydrocarbon compounds, which may easily cause the sulfur content, corrosion, acidity and other indicators of the oil to exceed the standard. In order to ensure the stability of the oil, the acidic substances in it are generally removed by alkali washing process, and the solution after alkali washing is waste alkali liquor, commonly known as alkali residue. The main components of alkali slag are high-concentration sulfides, some neutral oil substances brought in by emulsification during the alkali cleaning process, mercaptans, and thiophenols. In addition, the COD content in each liter of alkali slag can be as high as hundreds o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/40C01F11/18A62D3/00A62D3/30A62D3/36A62D101/28A62D101/47
CPCA62D3/40C01F11/18A62D3/00A62D3/30A62D3/36A62D2101/47A62D2101/28
Inventor 万新宇许海川张俊王海风高建军王锋武兵强
Owner CENT IRON & STEEL RES INST