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Oily sludge recycling and innocent comprehensive treatment process

A comprehensive treatment and oil sludge technology, applied in the field of resources and environment, can solve the problems of low investment, long treatment process and high treatment cost of coking method, and achieve good resource utilization effect, elimination of secondary pollution and good social benefits

Inactive Publication Date: 2011-05-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solvent extraction method can recover most of the oil resources in the oily sludge, but at the same time there are problems such as long treatment process, high treatment cost, and immature technology; the incineration method has a short process and good volume reduction effect for oily sludge, but there are secondary The problem of serious pollution; the biological treatment method generally has a long cycle; the coking method has less investment, but the transformation of the coking unit is relatively complicated and the processing capacity is small; the solid-liquid separation method is not effective for sludge with high oil content, and the oil recovery rate lower
It can be seen that the previous methods have different degrees of problems in the reduction, recycling and harmless treatment of oily sludge, and because of the complex composition of oily sludge, a single treatment method often fails to achieve the desired effect

Method used

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  • Oily sludge recycling and innocent comprehensive treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add the same volume of water and oily sludge into the oily sludge pretreatment tank at the same time, heat the temperature of the mixed liquid to 45°C, the stirring intensity of the agitator is 450r / min, and the stirring time is 45min, so that the oily sludge becomes fluidized sewage mud. The fluidized sludge is input into the stainless steel screen by the mud pump, and the solid impurities and scum with a particle size larger than 5mm are filtered out, and the fluidized sludge passing through the stainless steel screen enters the oily sludge conditioning tank, and the large pieces are removed The solid impurities and scum are air-dried under natural conditions to make the moisture content reach 30-45%. Add a mixture of two demulsifiers, sodium dodecylbenzenesulfonate and polyoxyethylene lauryl ether, into the oily sludge conditioning tank through a dosing device. The tempering temperature is 65-80°C, the stirring intensity is 400r / min, and the stirring time is 45min. ...

Embodiment 2

[0036] The fluidization and sieving pretreatment of oily sludge is the same as in Example 1. A mixture of two demulsifiers, sodium carbonate and sodium sulfate, is added to the oily sludge conditioning tank through a dosing device, and the addition amount is 0.02% of the weight of the oily sludge. %, using electric heating to keep the tempering temperature at 65-80°C, the stirring intensity at 400r / min, and the stirring time at 50min. The oily sludge treated by demulsification is transported to the oily sludge delivery pipeline, and the flocculant copolymerized cationic polyacrylamide is added into the pipeline through the dosing device, and the amount of the flocculant added is 0.2% of the weight of the oily sludge. The oily sludge after flocculation is transported to a three-phase horizontal screw centrifuge for three-phase separation of oil, water and mud, and the separated oil enters the oil-water separation system to recover crude oil, and the oil recovery rate can reach a...

Embodiment 3

[0039] Add water and oily sludge to the oily sludge pretreatment tank at the same time, the volume ratio is 2:1, the temperature of the mixed solution is heated to 45°C, the stirring intensity of the agitator is 500r / min, and the stirring time is 40min, so that the oily sludge Mud becomes fluidized sludge. The fluidized sludge is input into the stainless steel screen by the mud pump, and the solid impurities and scum with a particle size larger than 5mm are filtered out, and the fluidized sludge passing through the stainless steel screen enters the oily sludge conditioning tank, and the large pieces are removed The solid impurities and scum are air-dried under natural conditions to make the moisture content reach 30-45%. Add a mixture of two demulsifiers, sodium dodecylbenzenesulfonate and polyoxyethylene lauryl ether, into the oily sludge conditioning tank through a dosing device. The tempering temperature is 65-80°C, the stirring intensity is 400r / min, and the stirring time...

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Abstract

The invention provides an oily sludge recycling and innocent comprehensive treatment process, which comprises the following four steps of: 1, pretreating oily sludge: adding water into the oil sludge, heating and stirring to form fluidized sludge, and separating in a stainless steel screen; 2, conditioning the oily sludge, adding a demulsifier and a flocculant into the separated fluidized sludge for conditioning the oily sludge; 3, performing centrifugal separation on three phases of the oily sludge: introducing separated oil into an oil-water separation system for recovering crude oil, conveying separated water to the oily sludge pretreatment step for recycling, drying the separated residual oily sludge, and solid impurities and floating slag which are separated in the oily sludge pretreatment, and introducing the dried substances into a rotary kiln incinerator; and 4, performing mixed combustion on the residual oily sludge and biomass, performing high temperature incineration treatment after the residual oily sludge, the separated solid impurities and floating slag, and the biomass are mixed in a rotary kiln to remove the secondary pollution of the oily sludge, and recovering afterheat from high temperature flue gas.

Description

technical field [0001] The invention relates to the technical field of resources and environment, in particular to an oily sludge resource recovery, which combines the recovery of crude oil from oily sludge and the co-firing of separated solid or semi-solid oily sludge and biomass. Hazardous comprehensive treatment process. Background technique [0002] Oily sludge is solid waste produced during oil extraction, transportation, refining and oily sewage treatment. Its main components are crude oil, water and mud, and its oil content is usually between 10% and 50%. It is estimated that China's annual output of oily sludge is nearly 3 million tons, of which crude oil resources are about 600,000 tons. In addition to a large amount of aging crude oil, wax, colloid and other substances, oily sludge also contains a large amount of toxic and harmful substances such as benzene series, phenols, anthracene, pyrene, polychlorinated biphenyls, and dioxins. The mud also contains a large ...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C10G53/02
Inventor 胡建杭王华刘慧利祝星王超
Owner KUNMING UNIV OF SCI & TECH
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