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Method for processing heavy alkylbenzene sulfonate waste water

A technology of heavy alkylbenzene sulfonate and alkylbenzene sulfonate, which is applied in the field of waste water treatment, can solve the problems of high cost and poor treatment effect, and achieve stable operation, little impact on the surrounding environment, and low treatment cost Effect

Inactive Publication Date: 2013-10-02
马放
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the technical problems of high cost and poor treatment effect of the existing heavy alkylbenzenesulfonate wastewater treatment method, and provides a treatment method for heavy alkylbenzenesulfonate wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Specific embodiment one: the processing method of a kind of heavy alkylbenzene sulfonate wastewater of the present embodiment, carry out according to the following steps:

[0016] 1. Adjust the pH of heavy alkylbenzene sulfonate wastewater to 7-10, then discharge it into the fixed-bed wet catalytic oxidation tank, and add oxygen or air with a blower according to the volume ratio of oxygen to water at 30-60:1 In the tank, the hydraulic retention time is 0.3h to 1.0h, and the catalytic oxidation is completed; the catalyst is naturally accumulated in the fixed bed wet catalytic oxidation tank, and the catalyst is one or more combinations of iron, copper, aluminum, zinc, nickel and cobalt;

[0017] 2. Discharge the water after catalytic oxidation treatment into the secondary oxidation tank, add the oxidant into the pool at the rate of 1L-6L oxidant per ton of water, and complete the secondary oxidation by hydraulic retention of 0.5h-1.5h; the oxidant is One or a combination...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the pH of the heavy alkylbenzene sulfonate wastewater is adjusted to 8-9. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the volume ratio of oxygen to water is 40-55:1, and oxygen or air is added to the fixed-bed wet catalytic oxidation tank with a blower. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for processing heavy alkylbenzene sulfonate waste water, relates to a method for processing waste water, and aims to solve the technical problems that the existing method for processing the heavy alkylbenzene sulfonate waste water is high in cost and unstable in process operation. The method comprises the following steps of: after regulating pH of the heavy alkylbenzene sulfonate waste water, firstly carrying out catalytic wet oxidation processing on a fixed bed, secondly carrying out secondary oxidation, and finishing processing the heavy alkylbenzene sulfonate waste water after precipitation processing. The method has the advantages of low cost and stability in operation. The processed sewage index can reach GB8987-2002 primary B standard. The method can be used for processing organic waste water with high salinity and difficulty in biological treatment.

Description

technical field [0001] The invention relates to a method for treating waste water. Background technique [0002] Heavy alkylbenzene sulfonate (HABS) is an important surfactant used in oil displacement in my country in recent years. HABS has excellent characteristics of reducing crude oil-water interfacial tension, and has the advantages of excellent performance and low price, so it occupies an extremely important position in enhanced oil recovery, and its annual use is relatively large. [0003] Heavy alkylbenzene sulfonate is made from the main raw material dodecylbenzene rectification by-product - heavy alkylbenzene (HAB), 20% oleum, sodium hydroxide, absolute ethanol and petroleum ether, etc. And a surfactant obtained after. While producing heavy alkylbenzene sulfonate, a large amount of heavy alkylbenzene sulfonate waste water is also produced. This type of wastewater contains high concentrations of sulfite and sulfate, which are high-salt wastewater. Wastewater main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
Inventor 马放徐善文崔崇威邱珊
Owner 马放