低循环比下1.5Mt/a原油延迟焦化的产物分布预测及前景分析  

Product Distribution Prediction and Prospect Analysis ofa 1.5Mt/a Delayed Coking Unit at Low Cycle Ratios

作　　者：田凌燕 甄新平[1] 杨军卫 王华[1] 魏军 Tian Lingyan;Zhen Xinping;Yang Junwei;Wang Hua;Wei Jun(PetroChina Karamay Petrochemical Co.,Ltd.,Karamay Xinjiang 834000;State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao Shandong 266580)

机构地区：[1]中石油克拉玛依石化有限责任公司,新疆克拉玛依834000 [2]中国石油大学(华东)重质油全国重点实验室,山东青岛266580

出　　处：《中外能源》2024年第11期84-89,共6页Sino-Global Energy

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目“催化裂化-循环油加氢组合工艺(CRH)加工焦化重蜡油新技术开发”(编号:2018B-2007)。

摘　　要：中石油克拉玛依石化有限责任公司150×10^(4)t/a延迟焦化装置目前循环比为0.54,焦炭收率高,生焦比达1.88,严重影响了延迟焦化装置经济效益,急需进行低循环比改造。以装置上的焦化原料与辐射进料通过比例复配为不同循环比的焦化试验油样,通过实验室静态小试延迟焦化装置模拟评价了R=0.3、R=0.2和R=0.1三种循环比下焦化产物分布情况。结果 表明,随着循环比的降低,焦炭收率下降,液体收率增加,循环比从现在的0.54降至0.1,可降低石油焦产率2.64%,蜡油收率提高5.77%,生焦比由1.88降至1.50,循环比降至0.2时,焦炭收率下降1.99%,汽油、柴油、蜡油液体收率提高2.84%,干气液化气降低0.85%,装置年产焦炭将降低3×104t,生焦比降至1.59。按照目前市场石油焦与液体产品均价差值计算,循环比降至0.2后效益可达1.11亿元/a,为改造设计提供了基础数据。The 1.5Mt/a delayed coking unit of PetroChina Karamay Petrochemical Co.,Ltd.currently has a cycle ratio of 0.54 and a coking ratio(coke yield/feed CCR)of 1.88,seriously affecting the economic benefits of the delayed coking unit,so it is urgent to carry out transformation for low cycle ratios.The coking feedstock and the radiation feed are proportionally compounded into coking test oil samples with different cycle ratios,and the distribution of coking products at the cycle ratios of R=0.3,R=0.2 and R=0.1 is simulated and evaluated through a static small-scale delayed coking unit in the laboratory.The results show that as the cycle ratio decreases,the coke yield decreases and the liquid yield increases.Reducing the cycle ratio from 0.54 to 0.1 can reduce the petroleum coke yield by 2.64%,increase the gas oil yield by 5.77%and reduce the coking ratio from 1.88 to 1.50.When the cycle ratio is reduced to 0.2,the coke yield is reduced by 1.99%,the gasoline,diesel and gas oil yield is increased by 2.84%,and the dry gas liquefied gas is reduced by 0.85%.The annual coke output of the unit will be reduced by 30000 tons,and the coking ratio will be reduced to 1.59.According to the current average price difference between petroleum coke and liquid products in the market,the economic benefit can reach 111 million yuan per year after the cycle ratio is reduced to 0.2,which provides basic data for the transformation design.

关 键 词：延迟焦化 低循环比 石油焦 液收 

分 类 号：TE624.32[石油与天然气工程—油气加工工程]