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Treatment system and treatment method of oil refinery alkaline residue wastewater

A technology of alkali slag wastewater and treatment system, which is applied in natural water body treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of high cost of treatment technology, and achieve enhanced growth adaptability and cost The effect of reducing and eliminating hazards

Inactive Publication Date: 2017-06-20
DALIAN BISHUILANTIAN ENVIRONMENTAL PROTECTION TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] At present, the cost of using the existing treatment technology is very high, and the high water treatment fee has become a serious burden for refining and chemical enterprises

Method used

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  • Treatment system and treatment method of oil refinery alkaline residue wastewater
  • Treatment system and treatment method of oil refinery alkaline residue wastewater
  • Treatment system and treatment method of oil refinery alkaline residue wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as Figure 1-6 As shown, the internal circulation micro-gradient biological oxidation combined treatment system for the treatment of refinery alkali slag wastewater consists of a waste alkali storage tank, a denitrification reactor, two internal circulation aerobic bioreactors, a nitrification reactor, and an ozone catalytic reactor and nitrification reactors. The waste caustic storage tank is connected to the denitrification reactor, and there are alkali residue metering pumps, dilution water metering pumps, acid liquid metering pumps, nutrient salt metering pumps and nitrification liquid return pumps on the connecting pipeline between the waste caustic soda storage tank and the denitrification reactor . Two internal circulation aerobic bioreactors are set up in parallel, the denitrification reactors are respectively connected to the internal circulation aerobic bioreactors through pipelines, the internal circulation aerobic bioreactors are connected to the biolo...

Embodiment 2

[0044] The treatment method of the internal circulation micro-gradient biological oxidation combined treatment system of Example 1 of the present invention is as follows:

[0045] The spent alkali storage tank is connected to the denitrification reactor through the alkali slag metering pump, and the dilution water metering pump, the acid liquid metering pump, the nutrient salt metering pump and the nitrification liquid return pump are arranged on the connecting pipeline. After metering, the waste caustic liquor is mixed with dilution water in a certain proportion, and the mixed sewage is mixed and diluted again with the reflux water from the nitrification reactor at the end of the device. At this time, the COD of the total mixed sewage is controlled within the range of design requirements (usually COD≈3000mg / L or so). Add concentrated sulfuric acid to the pipeline for neutralization, control the pH of the total mixed sewage in the range of 8.5 to 10.5, and add sodium dihydrog...

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Abstract

The invention relates to a treatment system and a treatment method of oil refinery alkaline residue wastewater. The treatment system comprises a waste alkali storage tank, a denitrification unit, a primary biochemical unit, a secondary biochemical unit, an ozone catalytic oxidation unit and a nitration unit. The treatment system and the treatment method have the advantages of effective and stable removal of most CODs from the alkaline residue wastewater, mitigation of the treatment load of a subsequent common biochemical treatment technology, improvement of the impact resistance of a whole sewage treatment plant, stable quality of outlet water, simplicity in operation, and low engineering cost and running cost, and can be widely applied to the field of high-concentration alkaline residue wastewater treatment of the oil refining petrochemical industry.

Description

technical field [0001] The invention relates to a treatment technology for alkali residue wastewater, in particular to a high-efficiency biological treatment technology for alkali residue wastewater containing high-concentration sulfide and refractory organic matter produced during petroleum refining and processing. Background technique [0002] The alkali slag wastewater produced in the petroleum refining process contains a large amount of toxic and harmful pollutants such as neutral oil, organic acid, volatile phenol and sulfide. The wastewater is dark brown and has a foul smell. It is extremely difficult to treat and has always been a problem A difficult problem for my country's petrochemical refineries. Therefore, how to economically solve the problem of alkali slag disposal is an urgent problem for all refining and chemical enterprises. [0003] At present, the treatment methods of alkali slag wastewater in my country's petrochemical industry mainly include direct treat...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/36
Inventor 邓万军孙先峰张庆峰
Owner DALIAN BISHUILANTIAN ENVIRONMENTAL PROTECTION TECH ENG
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