Method for solving problem of asphaltene coking in residual oil

A technology of asphaltene and coking, which is applied to the device for coating liquid on the surface, pretreatment of the surface, coating, etc., which can solve the problems of increasing investment cost, increasing safety risks, and affecting the long-term operation of the device

Pending Publication Date: 2020-01-31
刘鹏 +3
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The residual oil hydrogenation process is the main technology for refining heavy oil at present. The residual oil refining includes ebullating bed, suspension bed and fixed bed residual oil hydrogenation technology processes. In all three processes, there is the coking problem of the equipment. Due to the boiling Bed and suspension bed residual oil hydrogenation conversion rate is relatively high, reaching more than 80%. The residual oil contains a large amount of asphaltenes and colloids, so that the four-component balance of the residual oil is broken after the reaction, and asphaltenes that

Method used

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  • Method for solving problem of asphaltene coking in residual oil
  • Method for solving problem of asphaltene coking in residual oil
  • Method for solving problem of asphaltene coking in residual oil

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Embodiment

[0046] Such as figure 1 as shown,

[0047] For old equipment, check the fractionation column inlet filter, pump inlet filter, third-line heat exchanger, bottom-reduction heat exchanger A and bottom-reduction heat exchanger B, clean the inner surface, polish, and pre-treat. The cleaning here is mainly Including coke cleaning and high temperature steam purge cleaning.

[0048] Stir the high-temperature-resistant and anti-stick nano-composite ceramic coating on the curing machine evenly without precipitation; mix the cured high-temperature-resistant and anti-stick nano-composite ceramic coating with the curing agent of the aluminum silicate type in a mass ratio of 2:1, Roll and mature on the machine for about 5-7 days, and then filter the cured mixed paint through a 200-mesh filter. After filtering, the paint is the finished product and is ready for use.

[0049] The cleaning of the inner surface of fractionation column inlet filter, pump inlet filter, third-line heat exchanger...

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Abstract

The invention discloses a method for solving the problem of asphaltene coking in residual oil and relates to the technical field of equipment decoking. A coating is sprayed to a device and a pipelinewhich are easy to coke. The coating is a high-temperature-resistant anti-sticking nano composite ceramic coating and has the characteristics of being resistant to high temperature, capable of preventing asphaltene sticking, resistant to wear and resistant to corrode, so that the sticking of asphaltene in the residual oil to the equipment and the pipeline is avoided. Compared with other anti-cokingmethods, for example, device equipment is filled with a chemical agent and a scale inhibitor, or the coked equipment is cleaned, by the adoption of the method, the effect of preventing coking of thedevice is more remarkable, the operation is convenient, safety and environment protection are achieved, and the labor amount is saved, so that the device can operate for a long period, and great economic benefits are brought to enterprises.

Description

technical field [0001] The invention relates to the technical field of equipment decoking, in particular to a method for solving asphaltene coking in residual oil and a coating thereof. Background technique [0002] In the process of heavy oil refining in petrochemical and coal chemical industries at home and abroad, there are problems such as coking, deposition and fouling of equipment, such as residual oil hydrogenation, coal tar hydrogenation, coal direct liquefaction and coal indirect liquefaction, etc. There are different degrees of asphaltene and colloidal coking problems. Among them, in the process of refining residual oil, equipment coking is more serious. The following mainly describes the coking situation of residual oil hydrogenation process. [0003] The residual oil hydrogenation process is the main technology for refining heavy oil at present. The residual oil refining includes ebullating bed, suspension bed and fixed bed residual oil hydrogenation technology p...

Claims

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Application Information

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IPC IPC(8): B05D7/22B05D7/24B05D3/02C04B30/00
CPCB05D3/0254B05D7/222B05D7/24C04B30/00C04B2111/00525C04B22/00C04B18/025
Inventor 刘鹏戈杰王畅谭生
Owner 刘鹏
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