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In situ coking of heavy pitch and other feedstocks with high fouling tendency

A heavy bitumen, in-situ technology, used in coking carbonaceous materials, processing tar pitch/petroleum pitch/natural pitch by heating, cracking, etc., can solve the problem of increasing coke production, accelerating heater tube fouling, and increasing device size And other issues

Pending Publication Date: 2020-11-24
LUMMUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recycle of light coker gas oil and higher recycle rates to limit fouling of heater tubes also increases unit size and results in increased coke production and lower liquids yield
Residual oils obtained from tight oil sources are highly paraffinic in nature and require higher heat input for conversion, thus accelerating heater tube fouling

Method used

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  • In situ coking of heavy pitch and other feedstocks with high fouling tendency

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Experimental program
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Embodiment Construction

[0017] specific implementation plan

[0018] Embodiments herein relate to systems and methods for in situ coking of heavy bitumen and other high fouling feedstocks by a delayed coking process. The heavy bitumen feedstock can include any number of refinery process streams that cannot be economically further distilled, catalytically cracked, or otherwise processed to produce a fuel-grade blended stream. Typically, these materials are not suitable for catalytic operation due to catalyst fouling and / or deactivation by ash and metals. Embodiments herein relate to the use of heavy bitumen or other high-fouling feedstocks as coking feedstocks, including residues from solvent deasphalting, ROSE units, resid hydrocracking, slurry hydrocracking, and shale (tight) oil. Oily heavy bitumen.

[0019] In some embodiments, the neat feedstock described above (undiluted) may be fed to a coker for delayed coking. In other embodiments, the feedstock can be minimally diluted, for example by add...

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Abstract

Processes and systems for in situ heating of a heavy pitch within a coking drum are disclosed. The in situ heating may provide for processing of neat pitch, improving coking operations and increasingliquid yield.

Description

Background technique [0001] Upgrading heavy bitumen and other high-fouling feedstocks through delayed coking is challenging at best, if possible. Heavy bitumen can be derived from a variety of processes including solvent deasphalting, supercritical solvent deasphalting (eg Rose unit or LC Fining), resid slurry hydrocracking, and resid from tight oil, among others. The difficulty in processing heavy pitches by delayed coking is primarily due to operational reliability or relative unreliability due to rapid coking of the fired heater tubes, which forces the plant to slow down or shut down for mechanical heater tube decoking. [0002] In processing heavy bitumen and addressing the above issues, refiners choose to process these bitumen streams by blending them with vacuum resid, atmospheric resid and other lighter hydrocarbon streams while achieving acceptable heater operation Length, design and / or operate cokers for high production rates. As a result, compounding with other str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00C10B57/16
CPCC10G9/005C10B55/00C10B57/045C10B57/16C10C3/002C10G9/36C10G51/023C10G2300/206C10G2300/1077C10G2300/807C10G2300/708C10G2300/4037C10G2300/4006
Inventor 艾哈迈德·A.·费格丹尼尔·布鲁斯·吉利斯
Owner LUMMUS TECH INC