P value determination device and method for heavy oil product

Abstract

The invention discloses a P value determination device and method for a heavy oil product. The determination device comprises a potentiometric titrator, a sample tank unit, an optical path detection unit, a pumping unit and a computer data processing unit. The device and the method, disclosed by the invention, can be used for automatically detecting the P value of the heavy oil product and troubles of manual operation are avoided; the time and labor are saved and contact between a sample of an operator and a reagent is reduced; meanwhile, a flocculation result of asphaltene diluted by hexadecane is judged according to changes of transmission light and back scattering light and changes of a pump head of a negative-pressure probe in a sample titration process. When the device and the method,disclosed by the invention, are used for determining the P value of the sample, detection samples with different diluting ratios do not need to be prepared and a plurality of times of repeated dilution detection are also not needed; the size of the P value can be determined only after one time of rough determination. Furthermore, on the basis of the rough determination, fine determination is increased and a multi-terminal-point judgment mode is used, so that the accuracy of a determination result can be further improved.

Description

technical field [0001] The invention relates to the technical field of measuring the P value of oil products, in particular to a device and method for measuring the P value of heavy oil products. Background technique [0002] Heavy fuel oil is the main marine fuel. The blending of fuel oil is based on the product quality requirements, the production capacity of the refinery and the order requirements of the market, and the component oil is blended into qualified fuel oil. It is an important means to use fuel oil resources for ships on water and reduce costs and increase efficiency. At present, due to the fierce competition in the marine fuel oil market and the weak management of the oil blending industry, driven by huge interests, many unscrupulous oil companies do not follow the ISO 8217 and GB / T 17411 standards that the fuel oil should be obtained from oil. Mixture regulations. In reality, a large amount of coal-based oil and low-quality oil are used as blending raw mate...

AI Technical Summary

Problems solved by technology

The instrument method needs to prepare 6 different detection diluents for detection, and there are many detection samples, and the judgment of the detection results only relies on the optical probe to detect whether the asphaltene is flocculated. In case of misjudgment, it is easy to cause detection The results are inaccurate and the reproducibility is not high

In addition, the instrument method does not have much advantage in terms of instrument purchase cost and detection time, and the method for determining the end point of asphaltene flocculation is too simple, which is prone to misjudgment

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