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Oilfield oil sludge treatment novel process

A technology of sludge and new technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problems of waste of resources, large space occupation, high failure rate, etc. Achieve the effects of less number of modules, small footprint and low failure rate

Active Publication Date: 2015-04-08
南京莫尼亚离心机科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing technology has the following disadvantages: due to the addition of chemicals in the process, on the one hand, resources are wasted, and on the other hand, secondary pollution can be generated. In addition, this process is difficult to meet the national standard for oil content in sludge. If the sludge contains oil It is difficult to carry out industrial production if the amount is lower than the national standard, and the processing amount is small, generally 200-300KG / H
[0004] The existing treatment process is complex, the number of modules is large, the failure rate is high, and the floor space is large. Oil, water, and separation are separated by settling and separating tanks; if more than 2 tons of sediment are produced per hour, the oil content is 3% to 6%, and the oil content in the water is greater than 500PPM. Oil contains more than 5% water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Daqing Oilfield Storage and Transportation Company North Oil Depot construction site construction, first put 300kg of sludge into the heating mixing tank with 5000kg of water, 5kg of demulsifier and 10kg of cleaning agent, through stirring to make the sludge evenly dispersed in the tank while heating When the temperature reaches 70°C, the mixed solution is poured into the ordinary sewage decanter centrifuge, and 6kg of flocculant is added online to separate 321kg of sediment mixture (the oil content of the sediment mixture is 4.3%) and 5000kg of oil-water mixture, and then the oil-water mixture is injected into the oil-water separation The device separates the oil and water to obtain 28.32kg of crude oil (the water content of crude oil is 9%) and 4971.68kg of water. The whole process takes 79 minutes.

Embodiment 2

[0020] Daqing Oilfield Storage and Transportation Company North Oil Depot construction site construction, first pump 300kg of sludge into the heating and mixing tank, add 1000kg of water, stir and heat to 70°C; add the sludge to the shearing machine (shearing machine The weight is 5000kg / 60 minutes), cut into lumps below 0.03cm, and the oil sludge is directly injected into a high-speed horizontal sludge sludge centrifuge to separate 31.16kg of crude oil (the moisture content of crude oil is 1%), sediment and 1268.84kg of water (the oil content of the mixture of sediment and water is 78ppm), then add 4000kg of water to the sediment and water, pass through a two-phase sewage decanter centrifuge and add 6kg of flocculant to separate 4969.84kg of water to obtain 305kg of mud cake It only needs to be discharged up to the standard, the oil content of the mud cake is 0.9%, and the whole process takes 12 minutes. Among them, the working time of the decanter is 3.5 minutes, and the pre...

Embodiment 3

[0022] At the field sludge storage site of the No. 3 Oil Production Plant of Daqing Oilfield, Heilongjiang Province, first put 300kg of sludge into a heating and stirring tank with 5000kg of water, 5kg of demulsifier and 10kg of cleaning agent. The sludge is evenly dispersed in the tank by stirring At the same time, it is heated to 70°C, and the mixed solution is poured into the ordinary sewage decanter centrifuge, and 6kg of flocculant is added online to separate 317kg of sediment mixture (the oil content of the sediment mixture is 5.1%) and 5004kg of oil-water mixture, and then the oil-water mixture is injected into The oil-water separator separates the oil and water to obtain 21.3kg of crude oil (the water content of crude oil is 13%) and 4982.7kg of water. The whole process takes 71 minutes.

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Abstract

The invention relates to an oilfield oil sludge treatment novel process, and aims at providing an oilfield oil sludge treatment novel process with which no agent is needed to be added, oil content in oil sludge can be lower than a national standard, and mass production can be realized. According to the invention, oil sludge and water with an amount 2-4 times that of the oil sludge are added into a heating and stirring tank, and are heated to a temperature of 60-80 DEG C; a mixture of oil sludge and water is added into a high-speed horizontal oil sludge special-purposed centrifuge, such that oil is separated from sediment water; water for diluting and a flocculating agent with weight 1 / 40 to 1 / 60 that of the oil sludge are added to the sediment water, and water is separated through a two-phase sewage horizontal screw centrifuge, wherein the amount of added water is 3-5 times that of water added in the step (1); and an obtained mud cake reaches a standard and can be discharged.

Description

technical field [0001] The invention relates to the technical field of oil sludge treatment produced by oil field drilling, tank cleaning, water treatment, oil refining, petrochemical industry, tanker clearance, oil storage units, desert oil lakes, oil pipelines, oil tank leaks, aging oil and industrial waste oil, etc. , especially relates to a new oilfield sludge treatment process. Background technique [0002] The current oilfield sludge treatment technical plan is: put the sludge into the heating and stirring tank, add demulsifier and cleaning agent and other agents, heat it to 60-80°C, and then enter the two-phase ordinary sewage decanter centrifuge while adding flocculant to separate the sludge The mud is separated from the oil-water mixture, and then the oil and water are separated. [0003] However, the existing technology has the following disadvantages: due to the addition of chemicals in the process, on the one hand, resources are wasted, and on the other hand, se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/14
Inventor 徐云飞
Owner 南京莫尼亚离心机科技发展有限公司
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