System and method for producing ethylene through steam thermal cracking

• Main Authors: YU CHAO, HE KUN, GU JINGRAN, LU LU, BAI MEI, YU DONGMING
• Format: Patent
• Language: Chinese; English
• Published: 03.03.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The invention discloses a system and a method for producing ethylene through steam thermal cracking, and belongs to the technical field of ethylene production. The system for producing ethylene through steam thermal cracking comprises an aromatic hydrocarbon extraction device and an ethylene cracking device, and is characterized in that extraction towers connected in parallel are arranged, naphtha and normal-pressure diesel oil are extracted and separated through the oil extraction device, and raffinate naphtha and raffinate normal-pressure diesel oil are obtained; and feeding into a cracking furnace as a cracking raw material to carry out steam thermal cracking reaction. The ethylene yield is increased under the condition of keeping the same feeding, and the method can be applied to commercial large-scale industrial production of ethylene products. 本发明公开了一种蒸汽热裂解产乙烯的系统及方法，属于乙烯生产技术领域。本发明公开的蒸汽热裂解产乙烯的系统包括芳烃抽提装置和乙烯裂解装置，本发明通过设置并联的抽提塔，将石脑油、常压柴油经过油品抽提装置萃取分离得到抽余石脑油、抽余常压柴油，并作为裂解原料进入到裂解炉中进行蒸汽热裂解反应。在保持相同进料的条件下提升乙烯产量，本发明