Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Heavy oil processing process

A processing technology and heavy oil technology, which is applied in the direction of refining and cracking process only in multi-stage series, can solve the problems of high investment and energy consumption, low liquid yield, etc., and achieve the effect of less investment, simple processing flow and improved yield

Inactive Publication Date: 2014-11-26
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
View PDF19 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the technical problems of high investment energy consumption and low liquid yield in the prior art, the present invention provides a heavy oil processing technology, which can reduce the yield of dry gas and coke, increase the yield of liquid products, and slow down heating Coking of the furnace tube, prolonging the operation period of the delayed coking unit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heavy oil processing process
  • Heavy oil processing process
  • Heavy oil processing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] according to figure 2 As shown in the process flow, heavy oil I (listed in Table 1) at 320°C is pressurized by a pump and enters the coking heating furnace 1 convection section for heating. same), control the temperature of the material at the outlet of the furnace tube in the convection section to be 410°C, and then enter the shallow thermal cracking reactor 2 and stay for 40.2min under the gauge pressure of 0.35MPa to carry out the shallow thermal cracking reaction.

[0046] The mixed material from the shallow thermal cracking reactor 2 is mixed with the circulating oil from the coking fractionation tower 5 and then enters the gas-liquid separation tank 3 for gas-liquid separation, and the oil gas is decoked and fractionated in the fractionation tower 5 for fractionation. The liquid phase returns to the radiant section of the coking heating furnace 1 to continue heating, injects 1.95% water vapor into the furnace tube of the radiant section, controls the furnace outl...

Embodiment 2

[0059] This example mainly investigates the change of properties of heavy oil I before and after shallow thermal cracking.

[0060] The shallow thermal cracking conditions are the same as in Example 1. The mixture of heavy oil I after shallow thermal cracking is cooled, separated and analyzed. The product distribution and main properties of the shallow thermal cracked heavy oil are listed in Table 4.

[0061] Comparing Table 1 and Table 4, it can be seen that the viscosity of shallow thermally cracked heavy oil is significantly reduced, the viscosity reduction rate at 100°C is 74.13%, the distillation range becomes lighter, and the yields of gas and gasoline fractions below 180°C respectively account for 1.56% and 3.92%, improving the feed properties of the radiant section of the heating furnace.

[0062] Table 4 Distribution of shallow thermal cracking products of heavy oil I and main properties of shallow thermal cracking heavy oil

[0063]

Embodiment 3

[0065] Investigation on coking tendency of heavy oil and its shallow thermal cracking in heating furnace tube.

[0066] Test principle: The traditional thermal scaling method (temperature difference method) is used to evaluate the coking tendency of heavy oil in the heating furnace tube. After the fluid passes through the coke scale test tube, the temperature decreases accordingly to investigate the coking tendency of heavy oil.

[0067] Test method: At the beginning of the test, the raw material oil is drawn out from the raw material tank with a pump, and input into the coke scale test tube. Control the temperature of the heating furnace to be constant, and keep the flow rate of the raw oil and the temperature of the raw oil at the inlet of the test tube constant throughout the test. At the beginning of the test, there is no fouling in the coke scale test tube, the total thermal resistance is the smallest, and the heat transferred to the fluid by the heating furnace is the m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a heavy oil processing process. According to the process, a fresh fed material is heated in a convection section of a heating furnace, and is subjected to a reaction in a shallow thermal cracking reactor; a material delivered from the reactor is subjected to gas-liquid separation; separated liquid-phase material is returned to a coking heating furnace and is heated; the heated liquid-phase material is divided into two parts which enter a coke tower respectively from the upper part (including the top part) and from the bottom part of the coke tower, and is subjected to deep thermal reaction; produced oil gas leaves from the top of the coke tower, and is fractionated in a coking fractionation tower; and after fractionation, a part of coking heavy oil is returned as circulation oil and is subjected to the reaction again. With the process, yields of dry gas and coke can be reduced, liquid product yield can be improved, heating furnace coking can be retarded, and coking device operation period can be prolonged.

Description

technical field [0001] The invention relates to a petroleum processing technology in the field of petroleum refining, in particular to a heavy oil processing technology. Background technique [0002] With the development of the global economy, the demand for light and clean fuel oil is also growing rapidly, and the quality of crude oil is getting worse and worse with the continuous increase of crude oil extraction, mainly manifested in high density, high viscosity, high content of heavy metals, High sulfur content, high nitrogen content, high colloid and asphaltene content, which brings great difficulties to the processing of crude oil, especially the secondary processing of heavy oil. [0003] At present, the processing of heavy oil is mainly based on the decarbonization process, and the delayed coking process has the characteristics of thorough decarbonization, simple process, mature technology, and low equipment investment, and has become one of the important processes fo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/04
Inventor 黄新龙李和杰王龙延王洪彬王晨涯江莉杜翔李节贺玲王少锋
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com