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Rapid dehydration method for dirty oil

A technology for rapid dehydration and slop oil, which is applied in the petroleum industry, processing hydrocarbon oil, and only multi-stage series refining process treatment, etc. The effect of shortening the settling distance, increasing the treatment capacity and enhancing the dehydration effect

Pending Publication Date: 2021-03-16
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a single method is used, including: heat deposition, chemical demulsification and ultrasonic treatment, the dehydration efficiency of the single method is low
With the development of technology, multiple methods are used to dehydrate dirty oil, such as: chemical demulsification + ultrasonic treatment + sedimentation, heat treatment + ultrasonic treatment + sedimentation, heat treatment + chemical demulsifier + ultrasonic treatment + sedimentation, these methods are all in After ultrasonic treatment, the material is transferred or transported to another equipment for sedimentation. When the dirty oil is transferred or transported from the ultrasonic equipment to the sedimentation equipment, water droplets and dirty oil will remix and shear emulsification, resulting in a decrease in dehydration efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for quick dehydration of dirty oil. The dirty oil stored in the dirty oil storage tank 13 (the dirty oil is taken from a refinery, with a water content of 20%) is pumped into the heat exchanger 15 by the pump 14 for heating, and the dirty oil is After heating to 75 °C, the flow rate is adjusted to 0.3 m / h by the flow meter 16, and then enters the ultrasonic sedimentation integrated partition processor for processing. The heat exchanger is heated by a steam generator 19 . The overall flow chart of the treatment process is as follows figure 1 shown.

[0031] Such as Figure 2~Figure 4 As shown, the ultrasonic sedimentation integrated partition processor includes a housing 1 and an ultrasonic zone 2 and a sedimentation zone 3 sequentially arranged in the housing 1; the housing 1 is a cuboid, and the aspect ratio of the housing is 3:1. , height 200 mm. The ratio of the lengths of the ultrasonic zone 2 to the settling zone 3 is 1:30. An ultrasonic transducer 4 ...

Embodiment 2

[0039] Same as Example 1, the only difference is that the dirty oil is heated to 75 °C, the flow rate is adjusted by the flowmeter to 0.3 m / h, the aspect ratio of the shell is 3.5:1, and the ratio of the length of the ultrasonic zone to the settlement zone 1:35, the number of horizontal partitions is 2, and the ultrasonic sound intensity in the ultrasonic area is 0.65 W / cm 2 . The time for dirty oil to flow through the ultrasonic zone is 25 minutes, and the time for dirty oil to flow through the settling zone is 11 hours.

[0040] The dirty oil is the same as in Example 1, the initial water content of the dirty oil is 20%, and after treatment, the water content of the purified oil is 0.85%.

Embodiment 3

[0042] Same as Example 1, the only difference is that the dirty oil is heated to 80 °C, the flow rate is adjusted by the flowmeter to 0.3 m / h, the aspect ratio of the shell is 4:1, and the ratio of the length of the ultrasonic zone to the settlement zone 1:40, the number of horizontal partitions is 3, and the ultrasonic sound intensity in the ultrasonic area is 0.70 W / cm 2 . The time for dirty oil to flow through the ultrasonic zone is 30 minutes, and the time for dirty oil to flow through the settling zone is 10 hours.

[0043] The dirty oil is the same as in Example 1, the initial water content of the dirty oil is 20%, and after treatment, the water content of the purified oil is 0.71%.

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Abstract

The invention relates to a rapid dehydration method for dirty oil. The method comprises the following steps of: heating the dirty oil to 70-80 DEG C, and treating the dirty oil by using an ultrasonicand sedimentation integrated partitioned treatment instrument. The ultrasonic and sedimentation integrated partitioned treatment instrument comprises a shell, an ultrasonic area and a sedimentation area which are sequentially arranged in the shell. An ultrasonic transducer is arranged in the ultrasonic area, and horizontal partition plates are arranged in the sedimentation area. The N horizontal partition plates divide the sedimentation area into N+1 horizontal sedimentation layers, and each horizontal sedimentation layer is provided with a purified oil outlet and a sewage outlet at the tail end of the shell. The method disclosed by the invention is continuous operation, so that the dirty oil can be quickly and deeply dehydrated and can meet the recycling requirement.

Description

technical field [0001] The invention relates to a method for treating dirty oil, in particular to a method for quickly dehydrating dirty oil. Background technique [0002] During refinery or oil field production, such as crude oil tank water cutting, top reduction tank water cutting, equipment cleaning and other processes will produce dirty oil. Due to the complex form, high water content and serious emulsification of dirty oil, it is difficult to recycle and treat. [0003] The dehydration of waste oil is the key to realize the recovery and reuse of waste oil. If a single method is used, including: heat deposition, chemical demulsification and ultrasonic treatment, the dehydration efficiency of the single method is low. With the development of technology, multiple methods are used to dehydrate dirty oil, such as: chemical demulsification + ultrasonic treatment + sedimentation, heat treatment + ultrasonic treatment + sedimentation, heat treatment + chemical demulsifier + ul...

Claims

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Application Information

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IPC IPC(8): C10G53/02
CPCC10G53/02C10G2300/1007C10G2300/202
Inventor 赵平杜新充任振军郭铁军张月萍
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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