Treatment method for tank bottom oil sludge

A treatment method and technology for sludge, applied in sludge treatment, water/sludge/sewage treatment, special treatment targets, etc., can solve the problems of low deoiling rate and slow deoiling speed, and achieve convenient operation and rapid separation. , the effect of simple reaction conditions

Pending Publication Date: 2018-10-26
中科海创环境科技(大连)有限公司
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Problems solved by technology

However, the deoiling speed of these methods is slow and the deoiling rate is not high.

Method used

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Embodiment 1

[0017] A method for treating tank bottom sludge. The existing oilfield tank bottom sludge has a solid content of 14%, an oil content of 17%, and a water content of 69%. The oilfield tank bottom sludge is processed, comprising the following steps:

[0018] Step 1. Add water to the oil sludge to adjust the slurry. The slurry adjustment is completed in the first-stage reactor. The amount of water is adjusted according to the ratio of the oil sludge to the oil sludge cake, and water is added to adjust the slurry according to the solid content of 8%. And while adding water to the oil sludge, use a metering pump to add the demulsifier AFTN204010 in the AFTN series crude oil demulsifier according to the addition amount of 100mg / L, adjust the rotation speed of the primary reactor to 900r / min for stirring reaction, and the reaction temperature is 50°C , the reaction time is 30min, and the oily slurry is obtained.

[0019] Step 2. Transfer the oil slurry in step 1 to the secondary react...

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Abstract

The invention provides a treatment method for tank bottom oil sludge. The method comprises the following steps: step one, performing water adding and mixing treatment on the oil sludge, enabling the solid content of the oil sludge to reach 4-15%; step two, adding sodium hydroxide solution to adjust a pH value to be 7.5-9; step three, adding a non-ionic surfactant and stirring in a high speed; andstep four, pumping into a clarification tank for precipitation separation. The provided treatment method for the tank bottom oil sludge is simple in reaction condition, convenient in operation, and capable of combining a demulsifying agent, the surfactant and an alkaline water washing technology in a specific reaction sequence and the reaction condition, realizing the rapid separation of the oil sludge, enabling a deoiling rate to reach 95% or more, and reducing the pollution of the oil sludge to the environment.

Description

technical field [0001] The invention relates to a treatment method for oil sludge at the bottom of a tank. Background technique [0002] The reduction treatment of oily sludge has always been one of the key points and difficulties in the work of environmental protection and petroleum business circles at home and abroad. So far, the chemical treatment methods of oily sludge at home and abroad are roughly divided into surfactant elution and degreasing, demulsifier demulsification and degreasing, alkaline water washing and degreasing, flocculant flocculation and degreasing and compound degreasing between agents. [0003] The demulsifier can destroy the emulsified liquid structure to achieve the purpose of separating the phases in the emulsion; the surfactant can reduce the tension of the liquid-liquid interface, and has dual characteristics of hydrophilic and lipophilic and special adsorption properties. The oil is removed from the sludge; and under alkaline conditions, the oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
CPCC02F11/00C02F2303/06
Inventor 郭光刘兴革王英健张欣欣尹伟
Owner 中科海创环境科技(大连)有限公司
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