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Water comprehensive characterization method for oil-containing sludge

A technology for sludge and characterization, applied in particle size analysis, particle and sedimentation analysis, measuring devices, etc., can solve the problems of complex operation, long test time, low efficiency, etc., and achieve the effect of good test repeatability and low test cost

Active Publication Date: 2013-09-18
ZHEJIANG UNIV
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Problems solved by technology

[0004] The common determination methods of oil sludge moisture content mainly include: distillation method, Karl Fischer method, extraction method, etc. There are some problems and defects in the above-mentioned methods, namely: 1. Only the water content can be measured but the emulsion water droplets can not be measured 2. It cannot be used to determine the stability of oil-sludge oil-water emulsion; 3. The test time is long, the efficiency is low, the operation is complicated, and the sample cannot be tested repeatedly
4. The measurement process uses toxic organic chemical solvents

Method used

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  • Water comprehensive characterization method for oil-containing sludge
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Embodiment

[0033] Weigh 9.3261g of oil sludge sample into an aluminum crucible, and cover the crucible lid. Put the crucible of the sample to be tested and the reference crucible into the differential scanning calorimeter, and set the temperature program according to the temperature control parameters designed in the present invention. Start the testing process. At the end of the test process, the DSC curve is obtained.

[0034] In order to describe the practicability of the present invention in detail, the oil sludge sample was extracted by Soxhlet extraction with petroleum ether (60-90° C.) until it was free of water to obtain an oil phase. The oil phase was tested in the same procedure as it was. At the end of the test, a DSC curve is obtained.

[0035] In order to describe the practicability of the present invention in detail, the sludge sample was centrifuged at 2500 rpm / min for 20 minutes to obtain the upper oil phase. The oil phase is tested according to the same procedure as ...

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Abstract

The invention discloses a water comprehensive characterization method for oil-containing sludge. According to the conventional measurement method, the measurement time is long, the efficiency is low and the operation is complicated, samples cannot be repeatedly tested, and toxic and organic chemical solvents are used in a measurement process. According to the water comprehensive characterization method, an oil-containing sludge sample with a certain weight is directly and flatly arranged at the bottom of an experiment container; temperature is controlled by a dynamic stability control (DSC) temperature control program; the oil-containing sludge is measured by a differential scanning calorimety, so that heat flow of crystallization and melting of emulsified water in the oil-containing sludge at different temperatures can be obtained; the stability and the salt content of the emulsified water in the oil-containing sludge can be quantitatively judged according to a DSC curve; the water content and the water drop distribution of the oil-containing sludge sample are quantitatively calculated according to the DSC curve and a formula. The water comprehensive characterization method can quickly obtain information such as the stability of the oil sludge, the water content, the water drop distribution and the salt content, and is high in measurement repeatability and low in measurement cost.

Description

technical field [0001] The invention relates to a method for comprehensively characterizing emulsified water in oil sludge by means of differential scanning calorimetry, in particular to a method for comprehensively characterizing water in oily sludge. Background technique [0002] Oily sludge (referred to as oil sludge) is an accompanying product of petroleum production, and is a kind of hazardous waste with recycling value composed of water, petroleum hydrocarbons and solid sediment. With the increasing shortage of conventional oil supply, many countries have carried out research on oil sludge recycling technology. In addition, oil sludge contains a large amount of toxic and harmful substances such as hydrocarbons, heavy metals, and persistent organic compounds. Without effective treatment and disposal, it is very easy to cause serious pollution to groundwater and soil, directly threatening environmental safety and public health. Therefore, the effective resource utilizat...

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Application Information

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IPC IPC(8): G01N25/20G01N15/02
Inventor 黄群星毛飞燕韩旭严建华池涌李晓东蒋旭光马增益王飞金余其陆胜勇薄拯
Owner ZHEJIANG UNIV
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