A method for measuring the solid content of catalytic cracking oil slurry

Abstract

The invention discloses a method for measuring the solid content of catalytic cracking oil slurry, which comprises weighing a centrifuge tube; pretreating the catalytic cracking oil slurry; taking the treated oil slurry with a set quality and adding it into the centrifuge tube, and adding a set amount Diluent, stir evenly, put it in a centrifuge for centrifugation; take out the centrifuge tube, pour out the liquid phase, re-add the set amount of diluent, stir well, and then put it in the centrifuge for centrifugation; take out the centrifuge tube, pour out the liquid phase , dry the centrifuge tube and the solid phase deposited at the bottom of the centrifuge tube; weigh the dried centrifuge tube and the solid phase deposited at the bottom of the centrifuge tube; Calculate the solid content of FCC oil slurry. The invention solves the problem of introducing colloid and asphaltene content into the measurement result and volume reading error when the traditional centrifugal method measures the solid content, and provides technical support for the investigation of the desolidification efficiency of the oil slurry and the safe and stable operation monitoring of the catalytic cracking unit of the refinery .

Description

technical field [0001] The invention relates to a method for analyzing and detecting catalytic cracking oil slurry, in particular to a method for measuring the solid content of catalytic cracking oil slurry. Background technique [0002] Catalytic cracking oil slurry is an external by-product of the catalytic cracking process. Because it contains a relatively high content of short-chain polycyclic aromatic hydrocarbons, it has become a high-quality raw material for the production of high value-added chemical products such as needle coke and carbon fiber. However, the oil slurry generally contains more than 2g / L solid particles (mainly catalyst and coke powder), which severely limit the efficient utilization of the oil slurry, so it is necessary to remove the solid particles in the oil slurry. The stable, accurate and rapid determination of the solid content in the oil slurry is the basis for investigating the desolidification efficiency of the oil slurry, and it is also the ...

AI Technical Summary

Problems solved by technology

The centrifugation method obtains the solid content by reading the volume of the solid phase in the centrifuge tube and looking up the table. The error is relatively large due to the influence of subjective factors and the inconspicuous solid-liquid interface in the reading.

In addition, the precision of the centrifuge tube used in the centrifugation method is 0.05mL, and the specifications are special. The centrifuges used are generally expensive petroleum centrifuges. It is generally difficult for laboratories other than refineries to meet the conditions required for the centrifugation method.

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