Method for processing oily sludge through supercutical fluid

A supercritical fluid and oil sludge technology, which is applied in sludge treatment, special treatment targets, mining wastewater treatment, etc., can solve the problems of waste of crude oil resources, complicated treatment process, high treatment cost, etc. Simple process and high processing efficiency

Inactive Publication Date: 2015-06-24
南通睿智超临界科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Solidified landfill: Landfill sites not only waste land resources, but also have the risk of polluting groundwater;
[0005] (2) pyrolysis method: high investment in pyrolysis method equipment; oxidation method needs to be carried out under high temperature and high pressure, and the processing cost is high;
[0006] (3) incineration: the incineration method needs auxiliary combustion, and the cost is high, and it is easy to produce secondary pollution to the atmosphere, which wastes crude oil resources;
[0007] (4) Biodegradation method: the biodegradation method has too long treatment cycle, slow effect, is greatly affected by environmental factors, and crude oil resources cannot be recycled;
[0009] There are some problems in the above methods, and there are limitations in practical application.

Method used

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  • Method for processing oily sludge through supercutical fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, set the extraction temperature, extraction pressure, and separation temperature and separation pressure to 35°C, 15MPa, 40°C, 5MPa, put 1000 grams of pretreated oily sludge into the extractor 1, and the other extractor 2 to be used Standby, when the extraction temperature is stable at 35°C, pump carbon dioxide from the carbon dioxide storage tank 4 into the extractor 1 through the carbon dioxide high-pressure pump 3, adjust the pressure of the extractor to 15 MPa through the valve 5, and at the same time, through the carrier pump 6 The carrier acetone is injected into the extractor according to the weight ratio of 15% of the amount of carbon dioxide from the carrier tank 7, and then the carbon dioxide and the carrier agent dissolved in the fuel oil are allowed to enter the primary separator 8, and the pressure of the separator is adjusted through the valve 9 8MPa, let the fuel oil be separated out in the primary separator 8, adjust the pressure of the secondary se...

Embodiment 2

[0028] First, set the extraction temperature, extraction pressure and separation temperature and separation pressure to 45°C, 30MPa, 40°C, 5MPa, put 1000 grams of pretreated oily sludge into the extractor 1, and the other extractor 2 to be used Standby, when the extraction temperature is stable at 45°C, pump carbon dioxide from the carbon dioxide storage tank 4 into the extractor 1 through the carbon dioxide high-pressure pump 3, adjust the pressure of the extractor to 30 MPa through the valve 5, and at the same time, through the carrier pump 6 The carrier agent ethyl acetate is injected into the extractor according to the weight ratio of 15% of the amount of carbon dioxide from the carrier agent tank 7, and then the carbon dioxide and the carrier agent dissolved in the fuel oil are allowed to enter the primary separator 8, and the separation is regulated by the valve 9 The device pressure is 8MPa, allowing the fuel oil to separate out in the primary separator 8, regulating the...

Embodiment 3

[0030] First, set the extraction temperature, extraction pressure and separation temperature and separation pressure to 55°C, 45MPa, 40°C, 5MPa, put 1000 grams of pretreated oily sludge into the extractor 1, and the other extractor 2 to be used Standby, when the extraction temperature is stable at 550°C, pump carbon dioxide from the carbon dioxide storage tank 4 into the extractor 1 through the carbon dioxide high-pressure pump 3, adjust the pressure of the extractor to 45 MPa through the valve 5, and at the same time, through the carrier pump 6 The carrier agent acetocyanide is injected into the extractor 1 according to the weight ratio of 20% of the amount of carbon dioxide from the carrier tank 7, and then the carbon dioxide and the carrier agent dissolved in the fuel oil are allowed to enter the primary separator 8, and the separation is regulated by the valve 9 The device pressure is 8MPa, allowing the fuel oil to separate out in the primary separator 8, regulating the pre...

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Abstract

The invention relates to a method for processing oily sludge through a supercutical fluid. The method comprises the steps of extracting the fuel oil from a routine preprocessed oily sludge due to the mutual effect of the supercutical fluid and a carrying agent under a certain temperature and pressure, wherein the extracting temperature is 35-80 DEG C, the pressure is 15-50 MPa, the separation temperature of a separator is 20-45 DEG C and the separation pressure is normal pressure-5 MPa; the supercutical fluid is supercritical carbon dioxide; and the carrying agent is one or more mixtures of methylene dichloride, ethyl acetate, acetone, petroleum ether and acetonitrile. The method has the following advantages that by adopting the method for processing the oily sludge through the supercutical fluid, the oily sludge is processed through a supercutical fluid extracting technology; the method is simple in process flow, high in processing efficiency, low in investment running cost and complete in oily sludge treatment; and the processed sludge can reach the national emission standard, the secondary pollution cannot be caused in the treatment process and the method is an environment-friendly green treatment process.

Description

technical field [0001] The invention relates to the technical field of oily sludge treatment and resource utilization, in particular to a method for supercritical fluid treatment of oily sludge. Background technique [0002] Oily sludge is a pollutant produced in the production process and gathering and transportation process of oilfields, and it is a major problem affecting the oilfield and surrounding environment and the sustainable development of oilfield economy. At present, oily sludge has been listed as oily waste in the "National Hazardous Waste Catalog", and the "National Cleaner Production Promotion Law" requires that oily sludge must be treated in a harmless manner. In addition, the oil content in oily sludge is 10-30%. Therefore, these oily sludges are valuable secondary resources. Collecting and processing these oily sludges can not only eliminate environmental pollution and generate environmental benefits, but also recycle The fuel oil can be recycled and reuse...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F103/10
CPCC02F11/00C02F2103/10C02F2303/06
Inventor 赵亚平孙明华
Owner 南通睿智超临界科技发展有限公司
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