Scale inhibitor of refining equipment

Abstract

A scale inhibitor for oil refining equipment, which is composed of 60-94% of polyalkenyl succinimide alkylphenol aldehyde condensate, 1-15% of metal deactivator, and 5-25% of detergent Made, the amount of organic solvent is 20% of the total weight of the above three components. The present invention is evaluated by a laboratory, and it is proved that it has the advantages of high scale inhibition efficiency, delaying coking and scaling of equipment, and the scale inhibition rate can reach more than 80% when the filling amount is 100 μg / g. It can be used to suppress and slow down the coking and fouling of various equipment in petroleum refining and petrochemical processes, especially for the coking and fouling of hydrogenation process equipment, such as gasoline hydrofinishing, diesel hydrofinishing, distillate oil hydrocracking, etc. Raw oil heat exchangers, reactors, heating furnaces and other equipment in the process can also be used to inhibit and slow down the coking of heat exchangers, steam generators, oil transfer lines and other equipment in catalytic cracking, delayed coking, crude oil distillation and other processes Fouling, so that various devices can maintain long-term safe operation.

Description

technical field [0001] The invention belongs to the technical field of hydrocarbon oil cracking, and in particular relates to preventing or removing fouling in pipes or coils with or without accessories. technical background [0002] In recent years, the nature of my country's crude oil has become increasingly heavy and inferior, and refineries along the river and coast have also blended a large amount of high-sulfur and high-carbon residual crude oil from the Middle East. Harsh, the processing depth is increasing, which leads to the gradual weight and deterioration of raw materials used in petroleum refining and petrochemical processing, which brings great difficulties to petroleum refining and petrochemical processing, such as residual oil hydrotreating , Hydrocracking, gasoline and diesel hydrofining, crude oil distillation and heavy oil catalytic cracking, delayed coking, cracking ethylene and other equipment, such as pipelines, heating furnace tubes, heat exchangers and o...

AI Technical Summary

Problems solved by technology

[0005] The main disadvantage of the above-mentioned scale inhibitors is poor high temperature resistance. Some detergents and dispersants are decomposed and used when the temperature is higher than 300 ° C, which has a negative impact on some subsequent processing and catalysts, such as thiophosphate, sulfide Phenylphenates and phosphate esters adversely affect the hydrogenation process

The antiscalant component has a single function

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