Title:
METHOD AND SYSTEM FOR DIRECTLY CRACKING CRUDE OIL TO PREPARE OLEFIN
Document Type and Number:
WIPO Patent Application WO/2021/083165
Kind Code:
A1
Abstract:
The present invention relates to a crude oil cracking method and system. The method comprises: delivering crude oil to a first tube group of a convection section of a cracking furnace for preheating and then performing vaporization to obtain a first gas phase and a first liquid phase; performing high-pressure extraction on the first liquid phase to obtain a non-asphalt oil and asphalt; and mixing the first gas phase and the non-asphalt oil with water vapor separately, or mixing the first gas phase with the non-asphalt oil first and then mixing the mixture with water vapor, then delivering the same to a second tube group of the convection section of the cracking furnace for heating, then delivering same to a radiation section of the cracking furnace for cracking to obtain a cracking product, and separating the cracking product to obtain a low-carbon olefin. In the present invention, after crude oil is preheated and vaporized in a cracking furnace, an obtained gas phase enters the cracking furnace, and an obtained liquid phase passes through a supercritical extraction unit to obtain a separated extract oil and the extract oil enters the cracking furnace; the method can effectively improve the crude oil cracking efficiency, improve the yield of a low-carbon olefin in the product, extend the operating cycle, and reduce coking of a gasified crude oil mixture in a cracking process.
Inventors:
LIU TONGJU (CN)
WANG GUOQING (CN)
ZHANG LIJUN (CN)
ZHANG ZHAOBIN (CN)
ZHOU CONG (CN)
JIANG BING (CN)
SHI YING (CN)
WANG GUOQING (CN)
ZHANG LIJUN (CN)
ZHANG ZHAOBIN (CN)
ZHOU CONG (CN)
JIANG BING (CN)
SHI YING (CN)
Application Number:
PCT/CN2020/124197
Publication Date:
May 06, 2021
Filing Date:
October 28, 2020
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
BEIJING RES INST CHEMICAL IND CHINA PETROLEUM & CHEMICAL CORP (CN)
BEIJING RES INST CHEMICAL IND CHINA PETROLEUM & CHEMICAL CORP (CN)
International Classes:
C10G55/00; C10G9/14
Foreign References:
| CN109694730A | 2019-04-30 | |||
| CN103788988A | 2014-05-14 | |||
| CN109694740A | 2019-04-30 | |||
| CN101583697A | 2009-11-18 | |||
| CN1957068A | 2007-05-02 | |||
| US3617493A | 1971-11-02 | |||
| CN1041967A | 1990-05-09 |
Other References:
ZHANG LIJUN: "Study on Modeling of Thermal Cracking and Its Application", CHINESE DOCTORAL DISSERTATIONS FULL-TEXT DATABASE, 15 June 2011 (2011-06-15), pages 1 - 141, XP055919318
See also references of EP 4053248A4
See also references of EP 4053248A4
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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