Apparatus used for determining sediments in crude oil and fuel oil

Abstract

The invention discloses an apparatus used for determining sediments in crude oil and fuel oil. The apparatus is mainly composed of a heating apparatus and an extracting apparatus. The extracting apparatus comprises an extracting flask, a condensing coil pipe, an extracting liner, and a liner support. The condensing coil pipe is fixed on the cap of the extracting flask. The two ends of the coil pipe penetrate through the cap, and the rest part of the coil pipe is positioned in the extracting flask. The liner support is suspended in the extracting flask. The extracting liner is arranged in the liner support. The extracting apparatus also comprises a flow guiding apparatus. The flow guiding apparatus comprises a round flow guiding plate with a diameter slightly smaller than the caliber of the extracting liner, and a connecting piece used for connecting the flow guiding plate and the condensing coil pipe. According to the invention, the flow guiding apparatus composed of the flow guiding plate and the connecting piece is added to the apparatus, such that a washing method with up-to-bottom washing is realized. In prior arts, 20 to 24 hours are required for determining a sample. With the apparatus provided by the invention, only 3 to 5 hours are needed. Therefore, determining efficiency is greatly improved, and the accuracy and high precision of determining results can be ensured.

Description

technical field [0001] The invention relates to a device for measuring sediment in crude oil and fuel oil. Background technique [0002] At present, according to GB / T6531-86 "Determination of Sediments in Crude Oil and Fuel Oil (Extraction Method)", there is a device for extracting toluene to determine the sediment content in crude oil and fuel oil, mainly by heating device ( Usually an electric heater) and an extraction device, the extraction device includes an extraction flask, a condensation coil, an extraction sleeve and a sleeve support, and the condensation coil is fixed on the cap of the extraction flask, The two ends are connected to the cooling liquid through the cap, and the rest are located in the extraction flask. The sleeve bracket is suspended in the extraction flask by a metal wire, and is located between the condenser coil and the solvent level contained in the extraction flask. , the extraction sleeve is placed in the sleeve support. The above equipment us...

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Problems solved by technology

When the above-mentioned device is used for detection, since the cooled solvent (toluene) directly drops into the sleeve from the condensation coil, this will cause the organic components in the crude oil or fuel oil to diffuse upward along the sleeve wall, and the flushing method is as follows: From bottom to top, it can be said that it is soaking rather than flushing in the true sense, which leads to a longer flushing time. Generally, the time to detect a sample is at least 20-24h, or even longer, which directly leads to staff's The detection efficiency is low; moreover, due to the high liquid level of the mixture of oil and toluene, this will also cause the organic components of the oil on the upper part of the sleeve wall to be difficult to wash off, which will affect the accuracy of the test results

In addition, since the temperature of the wall of the extraction flask is closely related to the temperature of the bottom of the flask, the volatilization rate of the solvent is relatively slow, and a lot of solvent vapor is absorbed by the extraction flask (such as the wall of the bottle) before it reaches the surface of the condenser. Cooling, resulting in too slow dripping of the solvent vapor into the extraction sleeve after condensation, which is also one of the reasons for the long flushing time of the existing detection device, especially when the temperature is low

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