Method for degrading waste alkaline residues through ozone-light wave catalytic oxidation

A technology of catalytic oxidation and waste alkali residue, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as refractory degradation and no treatment process, and reduce impact , to ensure the effect of normal operation

Inactive Publication Date: 2015-06-10
NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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Problems solved by technology

But there is not yet a better treatment process,

Method used

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  • Method for degrading waste alkaline residues through ozone-light wave catalytic oxidation
  • Method for degrading waste alkaline residues through ozone-light wave catalytic oxidation

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Embodiment Construction

[0022] Put refinery waste alkaline water (7% free NaOH, 3% petroleum, 3450mg / L sulfide, 3000mg / L volatile phenol, 136000mg / L COD) into the dilution tank and dilute it with water at 10:1, and then dilute the diluted The final waste alkaline water is poured into the neutralization tank, and concentrated H 2 SO 4 Adjust the pH value to about 8, and then send it to the ozone-light wave catalytic oxidation reactor.

[0023] The neutralized sewage enters the ozone-photocatalytic oxidation reactor from the water inlet ①, and the ozone generator ⑧ converts the air into ozone, and enters the ozone-photocatalytic oxidation reactor through the spherical diaphragm microporous aerator ⑥. The ozone-light wave catalytic oxidation reactor is filled with a solid catalyst ⑤ (Cu-Mn-Co composite heterogeneous catalyst), and the waste alkaline water is fully and uniformly contacted with ozone, catalyst, and ultraviolet light, and a catalytic oxidation reaction occurs, accompanied by A large amou...

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Abstract

The invention aims to provide a method for treating waste alkaline residues of a refinery plant. The method includes the steps that waste alkaline water of the refinery plant is delivered into a dilution tank and diluted with water according to the ratio of 7-15:1, the diluted waste alkaline water is delivered into a neutralization tank, the pH value is adjusted to 7-9 with a neutralization agent, then the waste alkaline water is delivered into an ozone-light wave catalytic oxidation reactor which is provided with a solid catalyst and an ultraviolet light generator inside, ozone is led into the ozone-light wave catalytic oxidation reactor, the waste alkaline water makes even and full contact with the ozone, the catalyst and ultraviolet light with catalytic oxidation reaction generated, foam generated in the reaction is led into a demister at the top of the ozone-light wave catalytic oxidation reactor, the demister performs foam killing, waste gas generated in the reaction is led into an incinerator through an exhaust pipe at the top of the demister, and the waste alkaline water treated through ozone-light wave catalytic oxidation is delivered into a waste water treatment plant to be further treated. By treating the waste alkaline residues through the method, the removal rate of various components of the waste alkaline residues is high, and the difficulty of further treatment of the waste water is greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an ozone-light wave catalytic oxidation degradation method for waste alkali slag. Background technique [0002] The wastewater produced by the oil refining industry has a large volume and complex components, and is a relatively difficult organic wastewater to treat, especially the alkali-containing wastewater produced by the refining system. Among them, the mass fraction of alkali is generally 5%-10%, the pH is above 11, and it contains high concentrations of phenols, sulfides, mercaptans, naphthenic acids and other substances. If it is above L, it will cause an impact on the subsequent biochemical system, thereby affecting the normal operation of the sewage treatment system and affecting the quality of the final effluent. [0003] Refinery waste alkali slag mainly contains reaction residual free sodium hydroxide, phenols, petroleum, sulfides, and a small am...

Claims

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Application Information

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IPC IPC(8): C02F9/08
Inventor 高占龙黄越
Owner NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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