Equal-space constant steam pressure measurement method and device for distillation range of petroleum product

Abstract

The invention relates to an equal-space constant steam pressure measurement method and an equal-space constant vapor pressure measurement device for a distillation range of a petroleum product and belongs to the technical field of on-line analysis of the product quality in the petrification refinery production process. The invention designs a method and a device for measuring an initial boiling point of the distillation range of the petroleum product by utilizing a steam pressure of an oil sample. The method has strong shock resistance and no pollution or signal loss, thus the repeated accuracy of monitoring the initial boiling point of the distillation range of the petroleum product is improved, but also the comparison property between the equal-space constant steam pressure measurement method and a national standard method is improved. An equal-space constant steam pressure uniform-speed distillation method is designed, a linear relation of the distilling speed and the heating power is established, and a uniform-speed distillation testing method regulated by the national standard is equivalently converted into an on-line analysis method. Not only the repeated accuracy of monitoring an intermediate fraction and a dry point of the distillation range of the petroleum product is improved, but also the comparison property between the equal-space constant steam pressure measurement method and the national standard method is improved. A capacitive sensing servo system for measuring the liquid level of the condensed oil sample in a measurement cylinder is designed. The measurement accuracy of the liquid level is ensured. The pollution easiness of a photoelectric servo system is also avoided.

Description

technical field [0001] In the production process of refineries of petrochemical companies, the method of online monitoring of light component oil extraction rate, especially involves the research and manufacture technology of high-precision petroleum product distillation range online analyzer that can save resources and increase output rate. Background technique [0002] 1. The application value of full distillation range online analyzer for petroleum products [0003] It is self-evident that the world oil crisis is becoming increasingly severe. China's self-sufficiency in crude oil has almost reached its limit. According to relevant data, China consumed 365 million tons of crude oil in 2008, an increase of 5.8% over 2007. In 2004, China's net import of crude oil reached 122.7 million tons, replacing Japan as the world's second largest oil consumer after the United States. At present, China's proven oil reserves are 2.38 billion tons. Based on the annual oil production rat...

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Problems solved by technology

[0006] At present, during the production process of my country's oil refineries, the laboratory collects sample oil every four hours for distillation analysis, and reports the results to the production workshop to guide the operators to correct operations. During the four hours, the workers are in a state of blind operation. Without sacrificing the product output rate, once the product is unqualified, it will cause a great waste of energy

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