Double-reactor coking raw material evaluation system

Abstract

The invention discloses a double-reactor coking raw material evaluation system, characterized in that: tubular reactors, condensers, liquid collectors and gas collectors are all two sets, two reactors are arranged individually, one of the reactor is a standard sample reactor used for holding standard samples, the other reactor is a sample to be tested reactor for holding samples to be tested, the heater is a container having two inward cavities which are isolated from each other, the standard sample reactor and the sample to be tested reactor respectively stick into the two inward cavities and are immersed in the heating medium of an external heating source; the two reactors are respectively communicated with the liquid collectors through liquid transport tubes, the condensers are arranges on the liquid transport tubes, and the liquid collectors are communicated with the gas collectors through gas transport tubes. According to the invention, by adopting the standard sample reactor and the sample to be tested reactor, the standard samples can be used for eliminating the difference of residual oil yields of the samples to be tested caused by different reaction processes in parallel experiments, thus the data of the samples to be tested are accurate, and the parallelism is good; and the standard samples can be used for controlling the reaction process of each experiment.

Description

technical field [0001] The invention relates to the evaluation of characteristics of coking raw materials applied in delayed coking production in petroleum refining process, in particular to a dual-reactor coking raw material evaluation system. Background technique [0002] In the process of petroleum refining, coking is the abbreviation of residual oil coking, which refers to the deep cracking of heavy oil (such as heavy oil, vacuum residue, cracked residue and even soil asphalt) at a high temperature of about 500 °C And condensation reaction, the process of producing gas, gasoline, diesel oil, wax oil and petroleum coke. Coking mainly includes five processes including delayed coking, kettle coking, open hearth coking, fluidized coking and flexible coking. Among them, the delayed coking process is to heat the coking raw materials to the reaction temperature in the heating furnace and leave the heating furnace quickly to ensure that the cracking reaction occurs as little as...

AI Technical Summary

Problems solved by technology

The traditional method of judging whether it is a projectile tar sample is mainly based on the physical parameters of the raw material, and the following two evaluation and analysis methods are commonly used: (1) Judging based on the API value of the coking raw material; (2) Judging based on the ratio of carbon residue and asphaltene of the coking raw material According to the statistics of the applicant, among the 34 oil samples collected, according to the two criteria of the ratio method of carbon residue and asphaltene, 14 oil samples were wrongly judged, and the correct rate Less than 60%

[0007] The limitations of this evaluation device are as follows: (1) Although the repeatability of the reaction process is good, the experimental results in different seasons have large errors; (2) when using this device for testing, due to the The samples to be tested are all placed, so there is no reference object, and the problem of who compares the experimental results of the samples to be tested with; (3) the heater has only one heating chamber, and the two reactors share a loam cake. When testing, The two reactors are located in the same heating chamber, there is heat transfer phenomenon, interference occurs, and the experimental results are affected

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