High acid value hydrocarbon oil delayed coking method

Abstract

The invention is a kind of method of delaying peracid hydrocarbon oil's burning. The process follows this. first, lead the raw material to coking heater to warm-up at the convection section, at upside of the beamy, heat up to temperature of 350 to 450 degree. Second, put outcome into cracking case and distill cymogene hydrocarbon and gas which come out from the top of reactor. Third, heat up the weight crackate, which comes out from the top of reactor, at radiant section of furnace to the temperature of 480-510 degree. Forth burn the outcome in coke chamber and then distill the burned gas to gain coking gas, gasoline, diesel, petrolatum oil and circulation oil. The advantages of the invention is that, first, it can produce peracid base oil by delayed coke equipment. Second, it can delay the coke's canker by peracid base oil and prolong the burning cycle length.

Description

technical field [0001] The invention belongs to a method for non-catalytic thermal cracking of hydrocarbon oil in the absence of hydrogen, more specifically, a method for delayed coking of hydrocarbon oil with high acid value. Background technique [0002] The research on the corrosion and anticorrosion of petroleum acid to production and refining equipment shows that when the total acid value in petroleum exceeds 1mgKOH / g, the acid corrosion will be quite serious. The acid in petroleum is mainly naphthenic acid. When processing crude oil with high acid value, naphthenic acid reacts with iron in refining equipment, causing corrosion of towers, furnace tubes, heat exchangers, pumps and other equipment; naphthenic acid The acid can also react with the protective film FeS on the surface of the refining equipment, exposing the metal surface of the equipment and subject to new corrosion. Petroleum acid eventually causes damage to petroleum processing e...

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Problems solved by technology

In this way, the naphthenic acid and other acidic substances in the raw oil not only corrode the convection section of the heating furnace, but also corrode the lower part of the fractionation tower, the radiant feed pump and the radiant furnace tube, etc., and because the raw oil may contain light components, With the evaporation of light components, the light naphthenic acid is brought to the middle and upper parts of the fractionation tower, and the middle and upper parts of the fractionation tower and trays, distillate oil pipelines, heat exchangers, radiant feed pumps, radiant furnace tubes and even Severe corrosion will occur in downstream processing units

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