Cleaning coke deposits from process equipment

A process equipment and a technology for removing carbon deposits. It is used in the cleaning of non-rotating equipment, mechanical equipment, lighting and heating equipment. It can solve the problems of time-consuming and uneconomical water spraying.

Pending Publication Date: 2018-12-21
CHEVRON PHILLIPS CHEMICAL CO LP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, water jet rinsing is time consuming and in many cases u

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  • Cleaning coke deposits from process equipment
  • Cleaning coke deposits from process equipment
  • Cleaning coke deposits from process equipment

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Embodiment Construction

[0015] Disclosed herein are aspects of one or more flexible pigs for removing one or more carbon deposits (e.g., coke billets) from one or more interior surfaces of process equipment and methods of using the same .

[0016] Reference herein to "process equipment" refers to any hydrocarbon process equipment that is exposed to reactions and / or conditions that form carbon deposits on interior surfaces to which the interior surfaces are exposed. For simplicity and clarity, as an aspect of the disclosed process equipment, a furnace tube with a stannide layer as a protective layer is discussed herein for use in a catalytic reforming process.

[0017] As used herein, "interior surface" refers to one or more interior surfaces of process equipment made of metal (e.g., carbon steel, mild steel, alloy steel, stainless steel, austenitic stainless steel, or combinations thereof), and Refers to one or more interior surfaces of process equipment having a protective metal layer thereon, such...

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Abstract

A method for cleaning a coke deposit from an internal surface of process equipment comprises removing at least a portion of the coke deposit from the internal surface using a flexible pig comprising aplurality of bristles, without damaging a metal protective layer of the internal surface of the process equipment. A flexible pig (100) for cleaning a coke deposit from an internal surface of processequipment without damaging a metal protective layer of the internal surface comprises a flexible body (110) formed of a polymeric material (130), and a plurality of bristles (120) partially encapsulated by the polymeric material of the flexible body.

Description

technical field [0001] The present disclosure relates to the use of pigs to remove carbon deposits from process equipment. Background technique [0002] The operation of the chemical process and the reactions involved can often result in the deposition of coke and the growth of coke billets on the interior surfaces of the process equipment. The presence of coke increases the temperature of the inner surface, leading to carburization and metal loss of the inner surface. For example, catalytic reforming reactions involving the conversion of naphtha hydrocarbons to reformate may foul the interior surfaces of furnace tubes with coke comprising at least one or more of catalytic coke and thermal coke. These initial carbon deposits may become coke billets over time. Carburization and metal loss caused by coke billets have a negative impact on the service life of process equipment. [0003] A protective metal layer (eg, a stannide layer) can protect the interior surfaces of proce...

Claims

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Application Information

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IPC IPC(8): B08B9/055C10G75/00F28G1/12
CPCB08B9/055F28G1/12F28G1/125C10G9/16C10G35/24B08B9/0557B08B9/0553B08B9/053A46B3/20A46B5/00A46B9/028A46B2200/3013B08B1/002B08B9/045C10B43/06F16L55/40F16L2101/12
Inventor V·麦加希
Owner CHEVRON PHILLIPS CHEMICAL CO LP
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