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Method for highly-efficiently performing hazard-free and biochemical treatment on alkaline residue from oil refinery

A technology for harmless treatment and oil refining alkali residue, which is applied in the removal of solid waste and other directions, can solve the problems of large investment, high operating cost, high energy consumption, etc., and achieve the effect of less investment, high operating cost, and simple operation and management.

Inactive Publication Date: 2010-06-30
广东奥美特集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings are large energy consumption, large investment, and high operating costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Alkali slag (usually sulfide≤40000mg / L, volatile phenol≤15000mg / L, COD≤150000mg / L) is treated as follows:

[0015] (1) Dilute the alkali slag with 10 times the volume of tap water in a static mixer, control the water temperature at 20°C, and the concentration of sulfide within the range of 2500mg / L, and use concentrated sulfuric acid to neutralize the diluted alkali slag sewage And, the pH value of control neutralization is 7.

[0016] (2) High-efficiency biological pretreatment is carried out on the diluted and neutralized alkaline slag sewage. The high-efficiency biological oxidation pretreatment is set in two stages, mainly to create different growth environments for different biochemical reaction stages from the microcosmic level, so as to improve the biological efficiency. oxidation efficiency. The first-stage biological oxidation mainly removes sulfide and some COD; the second-stage biological oxidation mainly removes phenol and COD; in order to prevent the pH va...

Embodiment 2

[0021] The alkali slag is diluted with 20 times the volume of tap water in a static mixer, and the water temperature is controlled at 40°C. The diluted alkali slag sewage is neutralized with concentrated sulfuric acid, and the pH value of the neutralization is controlled at 8. Other methods are the same as in Example 1. The treated sewage can be discharged up to standard.

Embodiment 3

[0023] The alkali slag is diluted with 15 times the volume of tap water in a static mixer, and the water temperature is controlled at 30°C. The diluted alkali slag sewage is neutralized with concentrated sulfuric acid, and the neutralized pH value is controlled at 7.5. Other methods are the same as in Example 1. The treated sewage can be discharged up to standard.

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Abstract

The invention relates to a method for highly-efficiently performing hazard-free and biochemical treatment on alkaline residue from oil refinery, which mainly comprises the following steps: diluting and neutralizing the alkaline residue; performing two stages of biological pretreatment on alkaline residue sewage produced by the dilution and neutralization; and filtering the alkaline residue sewage subjected to the two stages of biological oxidation pretreatment, introducing the filtered alkaline residue sewage into an oxidation column, catalyzing and oxidizing the alkaline residue sewage at the normal temperature and under the normal pressure, performing a subsequent third stage of biological oxidation treatment on the alkaline residue sewage which is catalyzed and oxidized with ozone until the alkaline residue sewage reaches a standard, and discharging the alkaline residue sewage. The method has the advantages of low investment, low operating cost and high pollutant removal rate.

Description

technical field [0001] The invention relates to a harmless treatment method for oil refining alkali slag. Background technique [0002] Refinery alkali slag waste liquid usually contains 3% to 10% free alkali. At present, the treatment methods of alkali slag wastewater in the petrochemical industry mainly include wet air oxidation and wet catalytic oxidation, but the above methods require large investment, high operating costs, and expensive catalysts. Wet air oxidation usually adopts a temperature of 200-320 degrees and a pressure of 1.5-20Mpa. The operating conditions for the treatment of petroleum alkali residue by Zimpro Company of the United States are temperature of 268 degrees and pressure of 11.3Mpa. COD, sulfide, and total phenol removal rates were 89.3%, 99.98%, and 99.8%, respectively. Its disadvantages are large energy consumption, large investment, and high operating costs. Contents of the invention [0003] Technical problem to be solved: The present inven...

Claims

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Application Information

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IPC IPC(8): B09B1/00
Inventor 林春涛
Owner 广东奥美特集团有限公司
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