Method for predicting cold filter plugging point of light diesel oil based on blending index concept

A prediction method and cold filter point technology, applied in the direction of material inspection products, etc., can solve problems such as difficulty and achieve the effect of ensuring adaptability

Inactive Publication Date: 2013-07-24
PETROCHINA CO LTD +1
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Problems solved by technology

Because some parameters involved in the relational formula, such as wax content, normal alkanes, etc., need to be measured with special instruments, so the practical application has certain difficulties

Method used

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  • Method for predicting cold filter plugging point of light diesel oil based on blending index concept
  • Method for predicting cold filter plugging point of light diesel oil based on blending index concept
  • Method for predicting cold filter plugging point of light diesel oil based on blending index concept

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Embodiment Construction

[0019] figure 1 The flow chart of the prediction method of cold filter point of light diesel oil based on the concept of blending index is given. First, convert the units of each component oil of light diesel oil from Celsius to Fahrenheit, then obtain the volume blending index of each component oil, and then calculate by adding the cold filter point (Fahrenheit) of each component oil Cold filter point (degrees Fahrenheit) of light diesel oil. Finally, the cold filter point (Celsius) of light diesel oil is obtained by unit conversion.

[0020] The conversion relationship between Celsius and Fahrenheit is:

[0021] CPF i =CP i ×1.8+32

[0022] CPF i —Cold filter point of component i, unit: °F;

[0023] CP i —Cold filtration point of component i, unit: °C;

[0024] figure 2 The volume blending index curves of the component oils are given. The abscissa of the figure is the cold filter point value (°F) of the component oil, and the ordinate is the volume blending index...

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Abstract

The invention relates to a method for predicting the cold filter plugging point of light diesel oil based on a blending index concept. The method comprises the following steps: 1, cold filter plugging point unit transformation: transforming the unit of the cold filter plugging point of light diesel oil to Fahrenheit degree from Celsius degree; 2, cold filter plugging point volume blending index solving: solving through utilizing the blending volumes and the cold filter plugging point Fahrenheit degrees of all component oils to obtain the cold filter plugging point volume blending indexes of all the component oils; 3, light diesel oil cold filter plugging point calculation: adding the cold filter plugging point volume blending indexes of all components and the cold filter plugging point Fahrenheit degrees of all the components to obtain the cold filter plugging point Fahrenheit degree of the light diesel oil; and 4, light diesel oil cold filter plugging point calculation: calculating through using the cold filter plugging point Fahrenheit degree of the light diesel oil to obtain the Celsius degree. The method allows the blending effect of the light diesel oil to be described through a parameter, and the blending effects of all the component oils to be conveniently changed through correcting the parameter against different crude oils and different processing technologies, so the cold filter plugging point prediction adaptability of the light diesel oil is guaranteed.

Description

technical field [0001] The invention relates to a method for predicting the cold filter point of light diesel oil based on the concept of blending index. Background technique [0002] Light diesel oil is usually blended from component oils. There is a non-linear relationship between the low-temperature fluidity index cold filter point and the blending ratio of component oils. Therefore, the blending of light diesel oil is often carried out by experience, and its workload and error are relatively large. Especially in the industrial production process, it often needs several times of repeated blending to meet the index of light diesel oil. When the source of crude oil changes or the production plan needs to be adjusted, it often encounters the problem of predicting the cold filter point of the new formulation of light diesel oil. It takes about 1-1.5 hours to measure the cold filtration point according to the standard method. If the work of new formula screening and adjustm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/28
Inventor 张洪强宁书贵韩凤义尚大军王湛董树新王春明刘巍关秋丽李泽飞练弘民
Owner PETROCHINA CO LTD
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